Initial commit

.gitignore

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+node_modules/
+*/node_modules/
+app-shell/
+*/build/

backend/.prettierrc

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+{
+  "singleQuote": true,
+  "tabWidth": 2,
+  "printWidth": 80,
+  "trailingComma": "all",
+  "quoteProps": "as-needed",
+  "jsxSingleQuote": true,
+  "bracketSpacing": true,
+  "bracketSameLine": false,
+  "arrowParens": "always"
+}

backend/.sequelizerc

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+const path = require('path');
+module.exports = {
+  "config": path.resolve("src", "db", "db.config.js"),
+  "models-path": path.resolve("src", "db", "models"),
+  "seeders-path": path.resolve("src", "db", "seeders"),
+  "migrations-path": path.resolve("src", "db", "migrations")
+};

backend/Dockerfile

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+FROM node:20.15.1-alpine
+
+RUN apk update && apk add bash
+# Create app directory
+WORKDIR /usr/src/app
+
+# Install app dependencies
+# A wildcard is used to ensure both package.json AND package-lock.json are copied
+# where available (npm@5+)
+COPY package*.json ./
+
+RUN yarn install
+# If you are building your code for production
+# RUN npm ci --only=production
+
+
+# Bundle app source
+COPY . .
+
+
+EXPOSE 8080
+
+CMD [ "yarn", "start" ]

backend/README.md

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+#Student Learner - template backend,
+
+#### Run App on local machine:
+
+##### Install local dependencies:
+
+- `yarn install`
+
+---
+
+##### Adjust local db:
+
+###### 1. Install postgres:
+
+- MacOS:
+
+  - `brew install postgres`
+
+- Ubuntu:
+  - `sudo apt update`
+  - `sudo apt install postgresql postgresql-contrib`
+
+###### 2. Create db and admin user:
+
+- Before run and test connection, make sure you have created a database as described in the above configuration. You can use the `psql` command to create a user and database.
+
+  - `psql postgres --u postgres`
+
+- Next, type this command for creating a new user with password then give access for creating the database.
+
+  - `postgres-# CREATE ROLE admin WITH LOGIN PASSWORD 'admin_pass';`
+  - `postgres-# ALTER ROLE admin CREATEDB;`
+
+- Quit `psql` then log in again using the new user that previously created.
+
+  - `postgres-# \q`
+  - `psql postgres -U admin`
+
+- Type this command to creating a new database.
+
+  - `postgres=> CREATE DATABASE db_student_learner;`
+
+- Then give that new user privileges to the new database then quit the `psql`.
+  - `postgres=> GRANT ALL PRIVILEGES ON DATABASE db_student_learner TO admin;`
+  - `postgres=> \q`
+
+---
+
+#### Api Documentation (Swagger)
+
+http://localhost:8080/api-docs (local host)
+
+http://host_name/api-docs
+
+---
+
+##### Setup database tables or update after schema change
+
+- `yarn db:migrate`
+
+##### Seed the initial data (admin accounts, relevant for the first setup):
+
+- `yarn db:seed`
+
+##### Start build:
+
+- `yarn start`

backend/package.json

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+{
+  "name": "studentlearner",
+  "description": "Student Learner - template backend",
+  "scripts": {
+    "start": "npm run db:migrate && npm run db:seed && nodemon ./src/index.js",
+    "db:migrate": "sequelize-cli db:migrate",
+    "db:seed": "sequelize-cli db:seed:all",
+    "db:drop": "sequelize-cli db:drop",
+    "db:create": "sequelize-cli db:create"
+  },
+  "dependencies": {
+    "@google-cloud/storage": "^5.18.2",
+    "axios": "^1.6.7",
+    "bcrypt": "5.1.1",
+    "cors": "2.8.5",
+    "csv-parser": "^3.0.0",
+    "express": "4.18.2",
+    "formidable": "1.2.2",
+    "helmet": "4.1.1",
+    "json2csv": "^5.0.7",
+    "jsonwebtoken": "8.5.1",
+    "lodash": "4.17.21",
+    "moment": "2.30.1",
+    "multer": "^1.4.4",
+    "mysql2": "2.2.5",
+    "nodemailer": "6.9.9",
+    "passport": "^0.7.0",
+    "passport-google-oauth2": "^0.2.0",
+    "passport-jwt": "^4.0.1",
+    "passport-microsoft": "^0.1.0",
+    "pg": "8.4.1",
+    "pg-hstore": "2.3.4",
+    "sequelize": "6.35.2",
+    "sequelize-json-schema": "^2.1.1",
+    "sqlite": "4.0.15",
+    "swagger-jsdoc": "^6.2.8",
+    "swagger-ui-express": "^5.0.0",
+    "tedious": "^18.2.4"
+  },
+  "engines": {
+    "node": ">=18"
+  },
+  "private": true,
+  "devDependencies": {
+    "cross-env": "7.0.3",
+    "mocha": "8.1.3",
+    "node-mocks-http": "1.9.0",
+    "nodemon": "2.0.5",
+    "sequelize-cli": "6.6.2"
+  }
+}

backend/src/auth/auth.js

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+const config = require('../config');
+const providers = config.providers;
+const helpers = require('../helpers');
+const db = require('../db/models');
+
+const passport = require('passport');
+const JWTstrategy = require('passport-jwt').Strategy;
+const ExtractJWT = require('passport-jwt').ExtractJwt;
+const GoogleStrategy = require('passport-google-oauth2').Strategy;
+const MicrosoftStrategy = require('passport-microsoft').Strategy;
+const UsersDBApi = require('../db/api/users');
+
+passport.use(
+  new JWTstrategy(
+    {
+      passReqToCallback: true,
+      secretOrKey: config.secret_key,
+      jwtFromRequest: ExtractJWT.fromAuthHeaderAsBearerToken(),
+    },
+    async (req, token, done) => {
+      try {
+        const user = await UsersDBApi.findBy({ email: token.user.email });
+
+        if (user && user.disabled) {
+          return done(new Error(`User '${user.email}' is disabled`));
+        }
+
+        req.currentUser = user;
+
+        return done(null, user);
+      } catch (error) {
+        done(error);
+      }
+    },
+  ),
+);
+
+passport.use(
+  new GoogleStrategy(
+    {
+      clientID: config.google.clientId,
+      clientSecret: config.google.clientSecret,
+      callbackURL: config.apiUrl + '/auth/signin/google/callback',
+      passReqToCallback: true,
+    },
+    function (request, accessToken, refreshToken, profile, done) {
+      socialStrategy(profile.email, profile, providers.GOOGLE, done);
+    },
+  ),
+);
+
+passport.use(
+  new MicrosoftStrategy(
+    {
+      clientID: config.microsoft.clientId,
+      clientSecret: config.microsoft.clientSecret,
+      callbackURL: config.apiUrl + '/auth/signin/microsoft/callback',
+      passReqToCallback: true,
+    },
+    function (request, accessToken, refreshToken, profile, done) {
+      const email = profile._json.mail || profile._json.userPrincipalName;
+      socialStrategy(email, profile, providers.MICROSOFT, done);
+    },
+  ),
+);
+
+function socialStrategy(email, profile, provider, done) {
+  db.users
+    .findOrCreate({ where: { email, provider } })
+    .then(([user, created]) => {
+      const body = {
+        id: user.id,
+        email: user.email,
+        name: profile.displayName,
+      };
+      const token = helpers.jwtSign({ user: body });
+      return done(null, { token });
+    });
+}

backend/src/config.js

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+const os = require('os');
+
+const config = {
+  gcloud: {
+    bucket: 'fldemo-files',
+    hash: '0b98e0a54372d9b288fb7a14b178d5d6',
+  },
+  bcrypt: {
+    saltRounds: 12,
+  },
+  admin_pass: 'password',
+  admin_email: 'admin@flatlogic.com',
+  providers: {
+    LOCAL: 'local',
+    GOOGLE: 'google',
+    MICROSOFT: 'microsoft',
+  },
+  secret_key: 'HUEyqESqgQ1yTwzVlO6wprC9Kf1J1xuA',
+  remote: '',
+  port: process.env.NODE_ENV === 'production' ? '' : '8080',
+  hostUI: process.env.NODE_ENV === 'production' ? '' : 'http://localhost',
+  portUI: process.env.NODE_ENV === 'production' ? '' : '3000',
+
+  portUIProd: process.env.NODE_ENV === 'production' ? '' : ':3000',
+
+  swaggerUI: process.env.NODE_ENV === 'production' ? '' : 'http://localhost',
+  swaggerPort: process.env.NODE_ENV === 'production' ? '' : ':8080',
+  google: {
+    clientId:
+      '671001533244-kf1k1gmp6mnl0r030qmvdu6v36ghmim6.apps.googleusercontent.com',
+    clientSecret: 'Yo4qbKZniqvojzUQ60iKlxqR',
+  },
+  microsoft: {
+    clientId: '4696f457-31af-40de-897c-e00d7d4cff73',
+    clientSecret: 'm8jzZ.5UpHF3=-dXzyxiZ4e[F8OF54@p',
+  },
+  uploadDir: os.tmpdir(),
+  email: {
+    from: 'Student Learner <app@flatlogic.app>',
+    host: 'email-smtp.us-east-1.amazonaws.com',
+    port: 587,
+    auth: {
+      user: 'AKIAVEW7G4PQUBGM52OF',
+      pass: process.env.EMAIL_PASS,
+    },
+    tls: {
+      rejectUnauthorized: false,
+    },
+  },
+  roles: {
+    admin: 'Administrator',
+    user: 'User',
+  },
+
+  project_uuid: 'f72b3a89-d8e7-43bb-91d4-c7613361ba43',
+  flHost:
+    process.env.NODE_ENV === 'production' ||
+    process.env.NODE_ENV === 'dev_stage'
+      ? 'https://flatlogic.com/projects'
+      : 'http://localhost:3000/projects',
+};
+config.pexelsKey = 'Vc99rnmOhHhJAbgGQoKLZtsaIVfkeownoQNbTj78VemUjKh08ZYRbf18';
+config.pexelsQuery = 'abstract educational technology';
+config.host =
+  process.env.NODE_ENV === 'production' ? config.remote : 'http://localhost';
+config.apiUrl = `${config.host}${config.port ? `:${config.port}` : ``}/api`;
+config.swaggerUrl = `${config.swaggerUI}${config.swaggerPort}`;
+config.uiUrl = `${config.hostUI}${config.portUI ? `:${config.portUI}` : ``}/#`;
+config.backUrl = `${config.hostUI}${config.portUI ? `:${config.portUI}` : ``}`;
+
+module.exports = config;

backend/src/db/api/achievements.js

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+const db = require('../models');
+const FileDBApi = require('./file');
+const crypto = require('crypto');
+const Utils = require('../utils');
+
+const Sequelize = db.Sequelize;
+const Op = Sequelize.Op;
+
+module.exports = class AchievementsDBApi {
+  static async create(data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const achievements = await db.achievements.create(
+      {
+        id: data.id || undefined,
+
+        name: data.name || null,
+        description: data.description || null,
+        importHash: data.importHash || null,
+        createdById: currentUser.id,
+        updatedById: currentUser.id,
+      },
+      { transaction },
+    );
+
+    await achievements.setStudents(data.students || [], {
+      transaction,
+    });
+
+    return achievements;
+  }
+
+  static async bulkImport(data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    // Prepare data - wrapping individual data transformations in a map() method
+    const achievementsData = data.map((item, index) => ({
+      id: item.id || undefined,
+
+      name: item.name || null,
+      description: item.description || null,
+      importHash: item.importHash || null,
+      createdById: currentUser.id,
+      updatedById: currentUser.id,
+      createdAt: new Date(Date.now() + index * 1000),
+    }));
+
+    // Bulk create items
+    const achievements = await db.achievements.bulkCreate(achievementsData, {
+      transaction,
+    });
+
+    // For each item created, replace relation files
+
+    return achievements;
+  }
+
+  static async update(id, data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const achievements = await db.achievements.findByPk(
+      id,
+      {},
+      { transaction },
+    );
+
+    const updatePayload = {};
+
+    if (data.name !== undefined) updatePayload.name = data.name;
+
+    if (data.description !== undefined)
+      updatePayload.description = data.description;
+
+    updatePayload.updatedById = currentUser.id;
+
+    await achievements.update(updatePayload, { transaction });
+
+    if (data.students !== undefined) {
+      await achievements.setStudents(data.students, { transaction });
+    }
+
+    return achievements;
+  }
+
+  static async deleteByIds(ids, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const achievements = await db.achievements.findAll({
+      where: {
+        id: {
+          [Op.in]: ids,
+        },
+      },
+      transaction,
+    });
+
+    await db.sequelize.transaction(async (transaction) => {
+      for (const record of achievements) {
+        await record.update({ deletedBy: currentUser.id }, { transaction });
+      }
+      for (const record of achievements) {
+        await record.destroy({ transaction });
+      }
+    });
+
+    return achievements;
+  }
+
+  static async remove(id, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const achievements = await db.achievements.findByPk(id, options);
+
+    await achievements.update(
+      {
+        deletedBy: currentUser.id,
+      },
+      {
+        transaction,
+      },
+    );
+
+    await achievements.destroy({
+      transaction,
+    });
+
+    return achievements;
+  }
+
+  static async findBy(where, options) {
+    const transaction = (options && options.transaction) || undefined;
+
+    const achievements = await db.achievements.findOne(
+      { where },
+      { transaction },
+    );
+
+    if (!achievements) {
+      return achievements;
+    }
+
+    const output = achievements.get({ plain: true });
+
+    output.students = await achievements.getStudents({
+      transaction,
+    });
+
+    return output;
+  }
+
+  static async findAll(filter, options) {
+    const limit = filter.limit || 0;
+    let offset = 0;
+    let where = {};
+    const currentPage = +filter.page;
+
+    offset = currentPage * limit;
+
+    const orderBy = null;
+
+    const transaction = (options && options.transaction) || undefined;
+
+    let include = [
+      {
+        model: db.students,
+        as: 'students',
+      },
+    ];
+
+    if (filter) {
+      if (filter.id) {
+        where = {
+          ...where,
+          ['id']: Utils.uuid(filter.id),
+        };
+      }
+
+      if (filter.name) {
+        where = {
+          ...where,
+          [Op.and]: Utils.ilike('achievements', 'name', filter.name),
+        };
+      }
+
+      if (filter.description) {
+        where = {
+          ...where,
+          [Op.and]: Utils.ilike(
+            'achievements',
+            'description',
+            filter.description,
+          ),
+        };
+      }
+
+      if (filter.active !== undefined) {
+        where = {
+          ...where,
+          active: filter.active === true || filter.active === 'true',
+        };
+      }
+
+      if (filter.students) {
+        const searchTerms = filter.students.split('|');
+
+        include = [
+          {
+            model: db.students,
+            as: 'students_filter',
+            required: searchTerms.length > 0,
+            where:
+              searchTerms.length > 0
+                ? {
+                    [Op.or]: [
+                      {
+                        id: {
+                          [Op.in]: searchTerms.map((term) => Utils.uuid(term)),
+                        },
+                      },
+                      {
+                        name: {
+                          [Op.or]: searchTerms.map((term) => ({
+                            [Op.iLike]: `%${term}%`,
+                          })),
+                        },
+                      },
+                    ],
+                  }
+                : undefined,
+          },
+          ...include,
+        ];
+      }
+
+      if (filter.createdAtRange) {
+        const [start, end] = filter.createdAtRange;
+
+        if (start !== undefined && start !== null && start !== '') {
+          where = {
+            ...where,
+            ['createdAt']: {
+              ...where.createdAt,
+              [Op.gte]: start,
+            },
+          };
+        }
+
+        if (end !== undefined && end !== null && end !== '') {
+          where = {
+            ...where,
+            ['createdAt']: {
+              ...where.createdAt,
+              [Op.lte]: end,
+            },
+          };
+        }
+      }
+    }
+
+    const queryOptions = {
+      where,
+      include,
+      distinct: true,
+      order:
+        filter.field && filter.sort
+          ? [[filter.field, filter.sort]]
+          : [['createdAt', 'desc']],
+      transaction: options?.transaction,
+      logging: console.log,
+    };
+
+    if (!options?.countOnly) {
+      queryOptions.limit = limit ? Number(limit) : undefined;
+      queryOptions.offset = offset ? Number(offset) : undefined;
+    }
+
+    try {
+      const { rows, count } = await db.achievements.findAndCountAll(
+        queryOptions,
+      );
+
+      return {
+        rows: options?.countOnly ? [] : rows,
+        count: count,
+      };
+    } catch (error) {
+      console.error('Error executing query:', error);
+      throw error;
+    }
+  }
+
+  static async findAllAutocomplete(query, limit, offset) {
+    let where = {};
+
+    if (query) {
+      where = {
+        [Op.or]: [
+          { ['id']: Utils.uuid(query) },
+          Utils.ilike('achievements', 'name', query),
+        ],
+      };
+    }
+
+    const records = await db.achievements.findAll({
+      attributes: ['id', 'name'],
+      where,
+      limit: limit ? Number(limit) : undefined,
+      offset: offset ? Number(offset) : undefined,
+      orderBy: [['name', 'ASC']],
+    });
+
+    return records.map((record) => ({
+      id: record.id,
+      label: record.name,
+    }));
+  }
+};

backend/src/db/api/courses.js

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+const db = require('../models');
+const FileDBApi = require('./file');
+const crypto = require('crypto');
+const Utils = require('../utils');
+
+const Sequelize = db.Sequelize;
+const Op = Sequelize.Op;
+
+module.exports = class CoursesDBApi {
+  static async create(data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const courses = await db.courses.create(
+      {
+        id: data.id || undefined,
+
+        title: data.title || null,
+        description: data.description || null,
+        importHash: data.importHash || null,
+        createdById: currentUser.id,
+        updatedById: currentUser.id,
+      },
+      { transaction },
+    );
+
+    await courses.setTeacher(data.teacher || null, {
+      transaction,
+    });
+
+    await courses.setStudents(data.students || [], {
+      transaction,
+    });
+
+    return courses;
+  }
+
+  static async bulkImport(data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    // Prepare data - wrapping individual data transformations in a map() method
+    const coursesData = data.map((item, index) => ({
+      id: item.id || undefined,
+
+      title: item.title || null,
+      description: item.description || null,
+      importHash: item.importHash || null,
+      createdById: currentUser.id,
+      updatedById: currentUser.id,
+      createdAt: new Date(Date.now() + index * 1000),
+    }));
+
+    // Bulk create items
+    const courses = await db.courses.bulkCreate(coursesData, { transaction });
+
+    // For each item created, replace relation files
+
+    return courses;
+  }
+
+  static async update(id, data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const courses = await db.courses.findByPk(id, {}, { transaction });
+
+    const updatePayload = {};
+
+    if (data.title !== undefined) updatePayload.title = data.title;
+
+    if (data.description !== undefined)
+      updatePayload.description = data.description;
+
+    updatePayload.updatedById = currentUser.id;
+
+    await courses.update(updatePayload, { transaction });
+
+    if (data.teacher !== undefined) {
+      await courses.setTeacher(
+        data.teacher,
+
+        { transaction },
+      );
+    }
+
+    if (data.students !== undefined) {
+      await courses.setStudents(data.students, { transaction });
+    }
+
+    return courses;
+  }
+
+  static async deleteByIds(ids, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const courses = await db.courses.findAll({
+      where: {
+        id: {
+          [Op.in]: ids,
+        },
+      },
+      transaction,
+    });
+
+    await db.sequelize.transaction(async (transaction) => {
+      for (const record of courses) {
+        await record.update({ deletedBy: currentUser.id }, { transaction });
+      }
+      for (const record of courses) {
+        await record.destroy({ transaction });
+      }
+    });
+
+    return courses;
+  }
+
+  static async remove(id, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const courses = await db.courses.findByPk(id, options);
+
+    await courses.update(
+      {
+        deletedBy: currentUser.id,
+      },
+      {
+        transaction,
+      },
+    );
+
+    await courses.destroy({
+      transaction,
+    });
+
+    return courses;
+  }
+
+  static async findBy(where, options) {
+    const transaction = (options && options.transaction) || undefined;
+
+    const courses = await db.courses.findOne({ where }, { transaction });
+
+    if (!courses) {
+      return courses;
+    }
+
+    const output = courses.get({ plain: true });
+
+    output.quizzes_course = await courses.getQuizzes_course({
+      transaction,
+    });
+
+    output.teacher = await courses.getTeacher({
+      transaction,
+    });
+
+    output.students = await courses.getStudents({
+      transaction,
+    });
+
+    return output;
+  }
+
+  static async findAll(filter, options) {
+    const limit = filter.limit || 0;
+    let offset = 0;
+    let where = {};
+    const currentPage = +filter.page;
+
+    offset = currentPage * limit;
+
+    const orderBy = null;
+
+    const transaction = (options && options.transaction) || undefined;
+
+    let include = [
+      {
+        model: db.teachers,
+        as: 'teacher',
+
+        where: filter.teacher
+          ? {
+              [Op.or]: [
+                {
+                  id: {
+                    [Op.in]: filter.teacher
+                      .split('|')
+                      .map((term) => Utils.uuid(term)),
+                  },
+                },
+                {
+                  name: {
+                    [Op.or]: filter.teacher
+                      .split('|')
+                      .map((term) => ({ [Op.iLike]: `%${term}%` })),
+                  },
+                },
+              ],
+            }
+          : {},
+      },
+
+      {
+        model: db.students,
+        as: 'students',
+      },
+    ];
+
+    if (filter) {
+      if (filter.id) {
+        where = {
+          ...where,
+          ['id']: Utils.uuid(filter.id),
+        };
+      }
+
+      if (filter.title) {
+        where = {
+          ...where,
+          [Op.and]: Utils.ilike('courses', 'title', filter.title),
+        };
+      }
+
+      if (filter.description) {
+        where = {
+          ...where,
+          [Op.and]: Utils.ilike('courses', 'description', filter.description),
+        };
+      }
+
+      if (filter.active !== undefined) {
+        where = {
+          ...where,
+          active: filter.active === true || filter.active === 'true',
+        };
+      }
+
+      if (filter.students) {
+        const searchTerms = filter.students.split('|');
+
+        include = [
+          {
+            model: db.students,
+            as: 'students_filter',
+            required: searchTerms.length > 0,
+            where:
+              searchTerms.length > 0
+                ? {
+                    [Op.or]: [
+                      {
+                        id: {
+                          [Op.in]: searchTerms.map((term) => Utils.uuid(term)),
+                        },
+                      },
+                      {
+                        name: {
+                          [Op.or]: searchTerms.map((term) => ({
+                            [Op.iLike]: `%${term}%`,
+                          })),
+                        },
+                      },
+                    ],
+                  }
+                : undefined,
+          },
+          ...include,
+        ];
+      }
+
+      if (filter.createdAtRange) {
+        const [start, end] = filter.createdAtRange;
+
+        if (start !== undefined && start !== null && start !== '') {
+          where = {
+            ...where,
+            ['createdAt']: {
+              ...where.createdAt,
+              [Op.gte]: start,
+            },
+          };
+        }
+
+        if (end !== undefined && end !== null && end !== '') {
+          where = {
+            ...where,
+            ['createdAt']: {
+              ...where.createdAt,
+              [Op.lte]: end,
+            },
+          };
+        }
+      }
+    }
+
+    const queryOptions = {
+      where,
+      include,
+      distinct: true,
+      order:
+        filter.field && filter.sort
+          ? [[filter.field, filter.sort]]
+          : [['createdAt', 'desc']],
+      transaction: options?.transaction,
+      logging: console.log,
+    };
+
+    if (!options?.countOnly) {
+      queryOptions.limit = limit ? Number(limit) : undefined;
+      queryOptions.offset = offset ? Number(offset) : undefined;
+    }
+
+    try {
+      const { rows, count } = await db.courses.findAndCountAll(queryOptions);
+
+      return {
+        rows: options?.countOnly ? [] : rows,
+        count: count,
+      };
+    } catch (error) {
+      console.error('Error executing query:', error);
+      throw error;
+    }
+  }
+
+  static async findAllAutocomplete(query, limit, offset) {
+    let where = {};
+
+    if (query) {
+      where = {
+        [Op.or]: [
+          { ['id']: Utils.uuid(query) },
+          Utils.ilike('courses', 'title', query),
+        ],
+      };
+    }
+
+    const records = await db.courses.findAll({
+      attributes: ['id', 'title'],
+      where,
+      limit: limit ? Number(limit) : undefined,
+      offset: offset ? Number(offset) : undefined,
+      orderBy: [['title', 'ASC']],
+    });
+
+    return records.map((record) => ({
+      id: record.id,
+      label: record.title,
+    }));
+  }
+};

backend/src/db/api/file.js

@@ -0,0 +1,73 @@
+const db = require('../models');
+const assert = require('assert');
+const services = require('../../services/file');
+
+module.exports = class FileDBApi {
+  static async replaceRelationFiles(relation, rawFiles, options) {
+    assert(relation.belongsTo, 'belongsTo is required');
+    assert(relation.belongsToColumn, 'belongsToColumn is required');
+    assert(relation.belongsToId, 'belongsToId is required');
+
+    let files = [];
+
+    if (Array.isArray(rawFiles)) {
+      files = rawFiles;
+    } else {
+      files = rawFiles ? [rawFiles] : [];
+    }
+
+    await this._removeLegacyFiles(relation, files, options);
+    await this._addFiles(relation, files, options);
+  }
+
+  static async _addFiles(relation, files, options) {
+    const transaction = (options && options.transaction) || undefined;
+    const currentUser = (options && options.currentUser) || { id: null };
+
+    const inexistentFiles = files.filter((file) => !!file.new);
+
+    for (const file of inexistentFiles) {
+      await db.file.create(
+        {
+          belongsTo: relation.belongsTo,
+          belongsToColumn: relation.belongsToColumn,
+          belongsToId: relation.belongsToId,
+          name: file.name,
+          sizeInBytes: file.sizeInBytes,
+          privateUrl: file.privateUrl,
+          publicUrl: file.publicUrl,
+          createdById: currentUser.id,
+          updatedById: currentUser.id,
+        },
+        {
+          transaction,
+        },
+      );
+    }
+  }
+
+  static async _removeLegacyFiles(relation, files, options) {
+    const transaction = (options && options.transaction) || undefined;
+
+    const filesToDelete = await db.file.findAll({
+      where: {
+        belongsTo: relation.belongsTo,
+        belongsToId: relation.belongsToId,
+        belongsToColumn: relation.belongsToColumn,
+        id: {
+          [db.Sequelize.Op.notIn]: files
+            .filter((file) => !file.new)
+            .map((file) => file.id),
+        },
+      },
+      transaction,
+    });
+
+    for (let file of filesToDelete) {
+      await services.deleteGCloud(file.privateUrl);
+      await file.destroy({
+        transaction,
+      });
+    }
+  }
+};

backend/src/db/api/options.js

@@ -0,0 +1,260 @@
+const db = require('../models');
+const FileDBApi = require('./file');
+const crypto = require('crypto');
+const Utils = require('../utils');
+
+const Sequelize = db.Sequelize;
+const Op = Sequelize.Op;
+
+module.exports = class OptionsDBApi {
+  static async create(data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const options = await db.options.create(
+      {
+        id: data.id || undefined,
+
+        text: data.text || null,
+        is_correct: data.is_correct || false,
+
+        importHash: data.importHash || null,
+        createdById: currentUser.id,
+        updatedById: currentUser.id,
+      },
+      { transaction },
+    );
+
+    return options;
+  }
+
+  static async bulkImport(data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    // Prepare data - wrapping individual data transformations in a map() method
+    const optionsData = data.map((item, index) => ({
+      id: item.id || undefined,
+
+      text: item.text || null,
+      is_correct: item.is_correct || false,
+
+      importHash: item.importHash || null,
+      createdById: currentUser.id,
+      updatedById: currentUser.id,
+      createdAt: new Date(Date.now() + index * 1000),
+    }));
+
+    // Bulk create items
+    const options = await db.options.bulkCreate(optionsData, { transaction });
+
+    // For each item created, replace relation files
+
+    return options;
+  }
+
+  static async update(id, data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const options = await db.options.findByPk(id, {}, { transaction });
+
+    const updatePayload = {};
+
+    if (data.text !== undefined) updatePayload.text = data.text;
+
+    if (data.is_correct !== undefined)
+      updatePayload.is_correct = data.is_correct;
+
+    updatePayload.updatedById = currentUser.id;
+
+    await options.update(updatePayload, { transaction });
+
+    return options;
+  }
+
+  static async deleteByIds(ids, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const options = await db.options.findAll({
+      where: {
+        id: {
+          [Op.in]: ids,
+        },
+      },
+      transaction,
+    });
+
+    await db.sequelize.transaction(async (transaction) => {
+      for (const record of options) {
+        await record.update({ deletedBy: currentUser.id }, { transaction });
+      }
+      for (const record of options) {
+        await record.destroy({ transaction });
+      }
+    });
+
+    return options;
+  }
+
+  static async remove(id, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const options = await db.options.findByPk(id, options);
+
+    await options.update(
+      {
+        deletedBy: currentUser.id,
+      },
+      {
+        transaction,
+      },
+    );
+
+    await options.destroy({
+      transaction,
+    });
+
+    return options;
+  }
+
+  static async findBy(where, options) {
+    const transaction = (options && options.transaction) || undefined;
+
+    const options = await db.options.findOne({ where }, { transaction });
+
+    if (!options) {
+      return options;
+    }
+
+    const output = options.get({ plain: true });
+
+    return output;
+  }
+
+  static async findAll(filter, options) {
+    const limit = filter.limit || 0;
+    let offset = 0;
+    let where = {};
+    const currentPage = +filter.page;
+
+    offset = currentPage * limit;
+
+    const orderBy = null;
+
+    const transaction = (options && options.transaction) || undefined;
+
+    let include = [];
+
+    if (filter) {
+      if (filter.id) {
+        where = {
+          ...where,
+          ['id']: Utils.uuid(filter.id),
+        };
+      }
+
+      if (filter.text) {
+        where = {
+          ...where,
+          [Op.and]: Utils.ilike('options', 'text', filter.text),
+        };
+      }
+
+      if (filter.active !== undefined) {
+        where = {
+          ...where,
+          active: filter.active === true || filter.active === 'true',
+        };
+      }
+
+      if (filter.is_correct) {
+        where = {
+          ...where,
+          is_correct: filter.is_correct,
+        };
+      }
+
+      if (filter.createdAtRange) {
+        const [start, end] = filter.createdAtRange;
+
+        if (start !== undefined && start !== null && start !== '') {
+          where = {
+            ...where,
+            ['createdAt']: {
+              ...where.createdAt,
+              [Op.gte]: start,
+            },
+          };
+        }
+
+        if (end !== undefined && end !== null && end !== '') {
+          where = {
+            ...where,
+            ['createdAt']: {
+              ...where.createdAt,
+              [Op.lte]: end,
+            },
+          };
+        }
+      }
+    }
+
+    const queryOptions = {
+      where,
+      include,
+      distinct: true,
+      order:
+        filter.field && filter.sort
+          ? [[filter.field, filter.sort]]
+          : [['createdAt', 'desc']],
+      transaction: options?.transaction,
+      logging: console.log,
+    };
+
+    if (!options?.countOnly) {
+      queryOptions.limit = limit ? Number(limit) : undefined;
+      queryOptions.offset = offset ? Number(offset) : undefined;
+    }
+
+    try {
+      const { rows, count } = await db.options.findAndCountAll(queryOptions);
+
+      return {
+        rows: options?.countOnly ? [] : rows,
+        count: count,
+      };
+    } catch (error) {
+      console.error('Error executing query:', error);
+      throw error;
+    }
+  }
+
+  static async findAllAutocomplete(query, limit, offset) {
+    let where = {};
+
+    if (query) {
+      where = {
+        [Op.or]: [
+          { ['id']: Utils.uuid(query) },
+          Utils.ilike('options', 'text', query),
+        ],
+      };
+    }
+
+    const records = await db.options.findAll({
+      attributes: ['id', 'text'],
+      where,
+      limit: limit ? Number(limit) : undefined,
+      offset: offset ? Number(offset) : undefined,
+      orderBy: [['text', 'ASC']],
+    });
+
+    return records.map((record) => ({
+      id: record.id,
+      label: record.text,
+    }));
+  }
+};

backend/src/db/api/parents.js

@@ -0,0 +1,337 @@
+const db = require('../models');
+const FileDBApi = require('./file');
+const crypto = require('crypto');
+const Utils = require('../utils');
+
+const Sequelize = db.Sequelize;
+const Op = Sequelize.Op;
+
+module.exports = class ParentsDBApi {
+  static async create(data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const parents = await db.parents.create(
+      {
+        id: data.id || undefined,
+
+        name: data.name || null,
+        importHash: data.importHash || null,
+        createdById: currentUser.id,
+        updatedById: currentUser.id,
+      },
+      { transaction },
+    );
+
+    await parents.setUser(data.user || null, {
+      transaction,
+    });
+
+    await parents.setChildren(data.children || [], {
+      transaction,
+    });
+
+    return parents;
+  }
+
+  static async bulkImport(data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    // Prepare data - wrapping individual data transformations in a map() method
+    const parentsData = data.map((item, index) => ({
+      id: item.id || undefined,
+
+      name: item.name || null,
+      importHash: item.importHash || null,
+      createdById: currentUser.id,
+      updatedById: currentUser.id,
+      createdAt: new Date(Date.now() + index * 1000),
+    }));
+
+    // Bulk create items
+    const parents = await db.parents.bulkCreate(parentsData, { transaction });
+
+    // For each item created, replace relation files
+
+    return parents;
+  }
+
+  static async update(id, data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const parents = await db.parents.findByPk(id, {}, { transaction });
+
+    const updatePayload = {};
+
+    if (data.name !== undefined) updatePayload.name = data.name;
+
+    updatePayload.updatedById = currentUser.id;
+
+    await parents.update(updatePayload, { transaction });
+
+    if (data.user !== undefined) {
+      await parents.setUser(
+        data.user,
+
+        { transaction },
+      );
+    }
+
+    if (data.children !== undefined) {
+      await parents.setChildren(data.children, { transaction });
+    }
+
+    return parents;
+  }
+
+  static async deleteByIds(ids, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const parents = await db.parents.findAll({
+      where: {
+        id: {
+          [Op.in]: ids,
+        },
+      },
+      transaction,
+    });
+
+    await db.sequelize.transaction(async (transaction) => {
+      for (const record of parents) {
+        await record.update({ deletedBy: currentUser.id }, { transaction });
+      }
+      for (const record of parents) {
+        await record.destroy({ transaction });
+      }
+    });
+
+    return parents;
+  }
+
+  static async remove(id, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const parents = await db.parents.findByPk(id, options);
+
+    await parents.update(
+      {
+        deletedBy: currentUser.id,
+      },
+      {
+        transaction,
+      },
+    );
+
+    await parents.destroy({
+      transaction,
+    });
+
+    return parents;
+  }
+
+  static async findBy(where, options) {
+    const transaction = (options && options.transaction) || undefined;
+
+    const parents = await db.parents.findOne({ where }, { transaction });
+
+    if (!parents) {
+      return parents;
+    }
+
+    const output = parents.get({ plain: true });
+
+    output.user = await parents.getUser({
+      transaction,
+    });
+
+    output.children = await parents.getChildren({
+      transaction,
+    });
+
+    return output;
+  }
+
+  static async findAll(filter, options) {
+    const limit = filter.limit || 0;
+    let offset = 0;
+    let where = {};
+    const currentPage = +filter.page;
+
+    offset = currentPage * limit;
+
+    const orderBy = null;
+
+    const transaction = (options && options.transaction) || undefined;
+
+    let include = [
+      {
+        model: db.users,
+        as: 'user',
+
+        where: filter.user
+          ? {
+              [Op.or]: [
+                {
+                  id: {
+                    [Op.in]: filter.user
+                      .split('|')
+                      .map((term) => Utils.uuid(term)),
+                  },
+                },
+                {
+                  firstName: {
+                    [Op.or]: filter.user
+                      .split('|')
+                      .map((term) => ({ [Op.iLike]: `%${term}%` })),
+                  },
+                },
+              ],
+            }
+          : {},
+      },
+
+      {
+        model: db.students,
+        as: 'children',
+      },
+    ];
+
+    if (filter) {
+      if (filter.id) {
+        where = {
+          ...where,
+          ['id']: Utils.uuid(filter.id),
+        };
+      }
+
+      if (filter.name) {
+        where = {
+          ...where,
+          [Op.and]: Utils.ilike('parents', 'name', filter.name),
+        };
+      }
+
+      if (filter.active !== undefined) {
+        where = {
+          ...where,
+          active: filter.active === true || filter.active === 'true',
+        };
+      }
+
+      if (filter.children) {
+        const searchTerms = filter.children.split('|');
+
+        include = [
+          {
+            model: db.students,
+            as: 'children_filter',
+            required: searchTerms.length > 0,
+            where:
+              searchTerms.length > 0
+                ? {
+                    [Op.or]: [
+                      {
+                        id: {
+                          [Op.in]: searchTerms.map((term) => Utils.uuid(term)),
+                        },
+                      },
+                      {
+                        name: {
+                          [Op.or]: searchTerms.map((term) => ({
+                            [Op.iLike]: `%${term}%`,
+                          })),
+                        },
+                      },
+                    ],
+                  }
+                : undefined,
+          },
+          ...include,
+        ];
+      }
+
+      if (filter.createdAtRange) {
+        const [start, end] = filter.createdAtRange;
+
+        if (start !== undefined && start !== null && start !== '') {
+          where = {
+            ...where,
+            ['createdAt']: {
+              ...where.createdAt,
+              [Op.gte]: start,
+            },
+          };
+        }
+
+        if (end !== undefined && end !== null && end !== '') {
+          where = {
+            ...where,
+            ['createdAt']: {
+              ...where.createdAt,
+              [Op.lte]: end,
+            },
+          };
+        }
+      }
+    }
+
+    const queryOptions = {
+      where,
+      include,
+      distinct: true,
+      order:
+        filter.field && filter.sort
+          ? [[filter.field, filter.sort]]
+          : [['createdAt', 'desc']],
+      transaction: options?.transaction,
+      logging: console.log,
+    };
+
+    if (!options?.countOnly) {
+      queryOptions.limit = limit ? Number(limit) : undefined;
+      queryOptions.offset = offset ? Number(offset) : undefined;
+    }
+
+    try {
+      const { rows, count } = await db.parents.findAndCountAll(queryOptions);
+
+      return {
+        rows: options?.countOnly ? [] : rows,
+        count: count,
+      };
+    } catch (error) {
+      console.error('Error executing query:', error);
+      throw error;
+    }
+  }
+
+  static async findAllAutocomplete(query, limit, offset) {
+    let where = {};
+
+    if (query) {
+      where = {
+        [Op.or]: [
+          { ['id']: Utils.uuid(query) },
+          Utils.ilike('parents', 'name', query),
+        ],
+      };
+    }
+
+    const records = await db.parents.findAll({
+      attributes: ['id', 'name'],
+      where,
+      limit: limit ? Number(limit) : undefined,
+      offset: offset ? Number(offset) : undefined,
+      orderBy: [['name', 'ASC']],
+    });
+
+    return records.map((record) => ({
+      id: record.id,
+      label: record.name,
+    }));
+  }
+};

backend/src/db/api/permissions.js

@@ -0,0 +1,253 @@
+const db = require('../models');
+const FileDBApi = require('./file');
+const crypto = require('crypto');
+const Utils = require('../utils');
+
+const Sequelize = db.Sequelize;
+const Op = Sequelize.Op;
+
+module.exports = class PermissionsDBApi {
+  static async create(data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const permissions = await db.permissions.create(
+      {
+        id: data.id || undefined,
+
+        name: data.name || null,
+        importHash: data.importHash || null,
+        createdById: currentUser.id,
+        updatedById: currentUser.id,
+      },
+      { transaction },
+    );
+
+    return permissions;
+  }
+
+  static async bulkImport(data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    // Prepare data - wrapping individual data transformations in a map() method
+    const permissionsData = data.map((item, index) => ({
+      id: item.id || undefined,
+
+      name: item.name || null,
+      importHash: item.importHash || null,
+      createdById: currentUser.id,
+      updatedById: currentUser.id,
+      createdAt: new Date(Date.now() + index * 1000),
+    }));
+
+    // Bulk create items
+    const permissions = await db.permissions.bulkCreate(permissionsData, {
+      transaction,
+    });
+
+    // For each item created, replace relation files
+
+    return permissions;
+  }
+
+  static async update(id, data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const permissions = await db.permissions.findByPk(id, {}, { transaction });
+
+    const updatePayload = {};
+
+    if (data.name !== undefined) updatePayload.name = data.name;
+
+    updatePayload.updatedById = currentUser.id;
+
+    await permissions.update(updatePayload, { transaction });
+
+    return permissions;
+  }
+
+  static async deleteByIds(ids, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const permissions = await db.permissions.findAll({
+      where: {
+        id: {
+          [Op.in]: ids,
+        },
+      },
+      transaction,
+    });
+
+    await db.sequelize.transaction(async (transaction) => {
+      for (const record of permissions) {
+        await record.update({ deletedBy: currentUser.id }, { transaction });
+      }
+      for (const record of permissions) {
+        await record.destroy({ transaction });
+      }
+    });
+
+    return permissions;
+  }
+
+  static async remove(id, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const permissions = await db.permissions.findByPk(id, options);
+
+    await permissions.update(
+      {
+        deletedBy: currentUser.id,
+      },
+      {
+        transaction,
+      },
+    );
+
+    await permissions.destroy({
+      transaction,
+    });
+
+    return permissions;
+  }
+
+  static async findBy(where, options) {
+    const transaction = (options && options.transaction) || undefined;
+
+    const permissions = await db.permissions.findOne(
+      { where },
+      { transaction },
+    );
+
+    if (!permissions) {
+      return permissions;
+    }
+
+    const output = permissions.get({ plain: true });
+
+    return output;
+  }
+
+  static async findAll(filter, options) {
+    const limit = filter.limit || 0;
+    let offset = 0;
+    let where = {};
+    const currentPage = +filter.page;
+
+    offset = currentPage * limit;
+
+    const orderBy = null;
+
+    const transaction = (options && options.transaction) || undefined;
+
+    let include = [];
+
+    if (filter) {
+      if (filter.id) {
+        where = {
+          ...where,
+          ['id']: Utils.uuid(filter.id),
+        };
+      }
+
+      if (filter.name) {
+        where = {
+          ...where,
+          [Op.and]: Utils.ilike('permissions', 'name', filter.name),
+        };
+      }
+
+      if (filter.active !== undefined) {
+        where = {
+          ...where,
+          active: filter.active === true || filter.active === 'true',
+        };
+      }
+
+      if (filter.createdAtRange) {
+        const [start, end] = filter.createdAtRange;
+
+        if (start !== undefined && start !== null && start !== '') {
+          where = {
+            ...where,
+            ['createdAt']: {
+              ...where.createdAt,
+              [Op.gte]: start,
+            },
+          };
+        }
+
+        if (end !== undefined && end !== null && end !== '') {
+          where = {
+            ...where,
+            ['createdAt']: {
+              ...where.createdAt,
+              [Op.lte]: end,
+            },
+          };
+        }
+      }
+    }
+
+    const queryOptions = {
+      where,
+      include,
+      distinct: true,
+      order:
+        filter.field && filter.sort
+          ? [[filter.field, filter.sort]]
+          : [['createdAt', 'desc']],
+      transaction: options?.transaction,
+      logging: console.log,
+    };
+
+    if (!options?.countOnly) {
+      queryOptions.limit = limit ? Number(limit) : undefined;
+      queryOptions.offset = offset ? Number(offset) : undefined;
+    }
+
+    try {
+      const { rows, count } = await db.permissions.findAndCountAll(
+        queryOptions,
+      );
+
+      return {
+        rows: options?.countOnly ? [] : rows,
+        count: count,
+      };
+    } catch (error) {
+      console.error('Error executing query:', error);
+      throw error;
+    }
+  }
+
+  static async findAllAutocomplete(query, limit, offset) {
+    let where = {};
+
+    if (query) {
+      where = {
+        [Op.or]: [
+          { ['id']: Utils.uuid(query) },
+          Utils.ilike('permissions', 'name', query),
+        ],
+      };
+    }
+
+    const records = await db.permissions.findAll({
+      attributes: ['id', 'name'],
+      where,
+      limit: limit ? Number(limit) : undefined,
+      offset: offset ? Number(offset) : undefined,
+      orderBy: [['name', 'ASC']],
+    });
+
+    return records.map((record) => ({
+      id: record.id,
+      label: record.name,
+    }));
+  }
+};

backend/src/db/api/questions.js

@@ -0,0 +1,308 @@
+const db = require('../models');
+const FileDBApi = require('./file');
+const crypto = require('crypto');
+const Utils = require('../utils');
+
+const Sequelize = db.Sequelize;
+const Op = Sequelize.Op;
+
+module.exports = class QuestionsDBApi {
+  static async create(data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const questions = await db.questions.create(
+      {
+        id: data.id || undefined,
+
+        content: data.content || null,
+        type: data.type || null,
+        importHash: data.importHash || null,
+        createdById: currentUser.id,
+        updatedById: currentUser.id,
+      },
+      { transaction },
+    );
+
+    await questions.setOptions(data.options || [], {
+      transaction,
+    });
+
+    return questions;
+  }
+
+  static async bulkImport(data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    // Prepare data - wrapping individual data transformations in a map() method
+    const questionsData = data.map((item, index) => ({
+      id: item.id || undefined,
+
+      content: item.content || null,
+      type: item.type || null,
+      importHash: item.importHash || null,
+      createdById: currentUser.id,
+      updatedById: currentUser.id,
+      createdAt: new Date(Date.now() + index * 1000),
+    }));
+
+    // Bulk create items
+    const questions = await db.questions.bulkCreate(questionsData, {
+      transaction,
+    });
+
+    // For each item created, replace relation files
+
+    return questions;
+  }
+
+  static async update(id, data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const questions = await db.questions.findByPk(id, {}, { transaction });
+
+    const updatePayload = {};
+
+    if (data.content !== undefined) updatePayload.content = data.content;
+
+    if (data.type !== undefined) updatePayload.type = data.type;
+
+    updatePayload.updatedById = currentUser.id;
+
+    await questions.update(updatePayload, { transaction });
+
+    if (data.options !== undefined) {
+      await questions.setOptions(data.options, { transaction });
+    }
+
+    return questions;
+  }
+
+  static async deleteByIds(ids, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const questions = await db.questions.findAll({
+      where: {
+        id: {
+          [Op.in]: ids,
+        },
+      },
+      transaction,
+    });
+
+    await db.sequelize.transaction(async (transaction) => {
+      for (const record of questions) {
+        await record.update({ deletedBy: currentUser.id }, { transaction });
+      }
+      for (const record of questions) {
+        await record.destroy({ transaction });
+      }
+    });
+
+    return questions;
+  }
+
+  static async remove(id, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const questions = await db.questions.findByPk(id, options);
+
+    await questions.update(
+      {
+        deletedBy: currentUser.id,
+      },
+      {
+        transaction,
+      },
+    );
+
+    await questions.destroy({
+      transaction,
+    });
+
+    return questions;
+  }
+
+  static async findBy(where, options) {
+    const transaction = (options && options.transaction) || undefined;
+
+    const questions = await db.questions.findOne({ where }, { transaction });
+
+    if (!questions) {
+      return questions;
+    }
+
+    const output = questions.get({ plain: true });
+
+    output.options = await questions.getOptions({
+      transaction,
+    });
+
+    return output;
+  }
+
+  static async findAll(filter, options) {
+    const limit = filter.limit || 0;
+    let offset = 0;
+    let where = {};
+    const currentPage = +filter.page;
+
+    offset = currentPage * limit;
+
+    const orderBy = null;
+
+    const transaction = (options && options.transaction) || undefined;
+
+    let include = [
+      {
+        model: db.options,
+        as: 'options',
+      },
+    ];
+
+    if (filter) {
+      if (filter.id) {
+        where = {
+          ...where,
+          ['id']: Utils.uuid(filter.id),
+        };
+      }
+
+      if (filter.content) {
+        where = {
+          ...where,
+          [Op.and]: Utils.ilike('questions', 'content', filter.content),
+        };
+      }
+
+      if (filter.active !== undefined) {
+        where = {
+          ...where,
+          active: filter.active === true || filter.active === 'true',
+        };
+      }
+
+      if (filter.type) {
+        where = {
+          ...where,
+          type: filter.type,
+        };
+      }
+
+      if (filter.options) {
+        const searchTerms = filter.options.split('|');
+
+        include = [
+          {
+            model: db.options,
+            as: 'options_filter',
+            required: searchTerms.length > 0,
+            where:
+              searchTerms.length > 0
+                ? {
+                    [Op.or]: [
+                      {
+                        id: {
+                          [Op.in]: searchTerms.map((term) => Utils.uuid(term)),
+                        },
+                      },
+                      {
+                        text: {
+                          [Op.or]: searchTerms.map((term) => ({
+                            [Op.iLike]: `%${term}%`,
+                          })),
+                        },
+                      },
+                    ],
+                  }
+                : undefined,
+          },
+          ...include,
+        ];
+      }
+
+      if (filter.createdAtRange) {
+        const [start, end] = filter.createdAtRange;
+
+        if (start !== undefined && start !== null && start !== '') {
+          where = {
+            ...where,
+            ['createdAt']: {
+              ...where.createdAt,
+              [Op.gte]: start,
+            },
+          };
+        }
+
+        if (end !== undefined && end !== null && end !== '') {
+          where = {
+            ...where,
+            ['createdAt']: {
+              ...where.createdAt,
+              [Op.lte]: end,
+            },
+          };
+        }
+      }
+    }
+
+    const queryOptions = {
+      where,
+      include,
+      distinct: true,
+      order:
+        filter.field && filter.sort
+          ? [[filter.field, filter.sort]]
+          : [['createdAt', 'desc']],
+      transaction: options?.transaction,
+      logging: console.log,
+    };
+
+    if (!options?.countOnly) {
+      queryOptions.limit = limit ? Number(limit) : undefined;
+      queryOptions.offset = offset ? Number(offset) : undefined;
+    }
+
+    try {
+      const { rows, count } = await db.questions.findAndCountAll(queryOptions);
+
+      return {
+        rows: options?.countOnly ? [] : rows,
+        count: count,
+      };
+    } catch (error) {
+      console.error('Error executing query:', error);
+      throw error;
+    }
+  }
+
+  static async findAllAutocomplete(query, limit, offset) {
+    let where = {};
+
+    if (query) {
+      where = {
+        [Op.or]: [
+          { ['id']: Utils.uuid(query) },
+          Utils.ilike('questions', 'content', query),
+        ],
+      };
+    }
+
+    const records = await db.questions.findAll({
+      attributes: ['id', 'content'],
+      where,
+      limit: limit ? Number(limit) : undefined,
+      offset: offset ? Number(offset) : undefined,
+      orderBy: [['content', 'ASC']],
+    });
+
+    return records.map((record) => ({
+      id: record.id,
+      label: record.content,
+    }));
+  }
+};

backend/src/db/api/quizzes.js

@@ -0,0 +1,337 @@
+const db = require('../models');
+const FileDBApi = require('./file');
+const crypto = require('crypto');
+const Utils = require('../utils');
+
+const Sequelize = db.Sequelize;
+const Op = Sequelize.Op;
+
+module.exports = class QuizzesDBApi {
+  static async create(data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const quizzes = await db.quizzes.create(
+      {
+        id: data.id || undefined,
+
+        title: data.title || null,
+        importHash: data.importHash || null,
+        createdById: currentUser.id,
+        updatedById: currentUser.id,
+      },
+      { transaction },
+    );
+
+    await quizzes.setCourse(data.course || null, {
+      transaction,
+    });
+
+    await quizzes.setQuestions(data.questions || [], {
+      transaction,
+    });
+
+    return quizzes;
+  }
+
+  static async bulkImport(data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    // Prepare data - wrapping individual data transformations in a map() method
+    const quizzesData = data.map((item, index) => ({
+      id: item.id || undefined,
+
+      title: item.title || null,
+      importHash: item.importHash || null,
+      createdById: currentUser.id,
+      updatedById: currentUser.id,
+      createdAt: new Date(Date.now() + index * 1000),
+    }));
+
+    // Bulk create items
+    const quizzes = await db.quizzes.bulkCreate(quizzesData, { transaction });
+
+    // For each item created, replace relation files
+
+    return quizzes;
+  }
+
+  static async update(id, data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const quizzes = await db.quizzes.findByPk(id, {}, { transaction });
+
+    const updatePayload = {};
+
+    if (data.title !== undefined) updatePayload.title = data.title;
+
+    updatePayload.updatedById = currentUser.id;
+
+    await quizzes.update(updatePayload, { transaction });
+
+    if (data.course !== undefined) {
+      await quizzes.setCourse(
+        data.course,
+
+        { transaction },
+      );
+    }
+
+    if (data.questions !== undefined) {
+      await quizzes.setQuestions(data.questions, { transaction });
+    }
+
+    return quizzes;
+  }
+
+  static async deleteByIds(ids, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const quizzes = await db.quizzes.findAll({
+      where: {
+        id: {
+          [Op.in]: ids,
+        },
+      },
+      transaction,
+    });
+
+    await db.sequelize.transaction(async (transaction) => {
+      for (const record of quizzes) {
+        await record.update({ deletedBy: currentUser.id }, { transaction });
+      }
+      for (const record of quizzes) {
+        await record.destroy({ transaction });
+      }
+    });
+
+    return quizzes;
+  }
+
+  static async remove(id, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const quizzes = await db.quizzes.findByPk(id, options);
+
+    await quizzes.update(
+      {
+        deletedBy: currentUser.id,
+      },
+      {
+        transaction,
+      },
+    );
+
+    await quizzes.destroy({
+      transaction,
+    });
+
+    return quizzes;
+  }
+
+  static async findBy(where, options) {
+    const transaction = (options && options.transaction) || undefined;
+
+    const quizzes = await db.quizzes.findOne({ where }, { transaction });
+
+    if (!quizzes) {
+      return quizzes;
+    }
+
+    const output = quizzes.get({ plain: true });
+
+    output.course = await quizzes.getCourse({
+      transaction,
+    });
+
+    output.questions = await quizzes.getQuestions({
+      transaction,
+    });
+
+    return output;
+  }
+
+  static async findAll(filter, options) {
+    const limit = filter.limit || 0;
+    let offset = 0;
+    let where = {};
+    const currentPage = +filter.page;
+
+    offset = currentPage * limit;
+
+    const orderBy = null;
+
+    const transaction = (options && options.transaction) || undefined;
+
+    let include = [
+      {
+        model: db.courses,
+        as: 'course',
+
+        where: filter.course
+          ? {
+              [Op.or]: [
+                {
+                  id: {
+                    [Op.in]: filter.course
+                      .split('|')
+                      .map((term) => Utils.uuid(term)),
+                  },
+                },
+                {
+                  title: {
+                    [Op.or]: filter.course
+                      .split('|')
+                      .map((term) => ({ [Op.iLike]: `%${term}%` })),
+                  },
+                },
+              ],
+            }
+          : {},
+      },
+
+      {
+        model: db.questions,
+        as: 'questions',
+      },
+    ];
+
+    if (filter) {
+      if (filter.id) {
+        where = {
+          ...where,
+          ['id']: Utils.uuid(filter.id),
+        };
+      }
+
+      if (filter.title) {
+        where = {
+          ...where,
+          [Op.and]: Utils.ilike('quizzes', 'title', filter.title),
+        };
+      }
+
+      if (filter.active !== undefined) {
+        where = {
+          ...where,
+          active: filter.active === true || filter.active === 'true',
+        };
+      }
+
+      if (filter.questions) {
+        const searchTerms = filter.questions.split('|');
+
+        include = [
+          {
+            model: db.questions,
+            as: 'questions_filter',
+            required: searchTerms.length > 0,
+            where:
+              searchTerms.length > 0
+                ? {
+                    [Op.or]: [
+                      {
+                        id: {
+                          [Op.in]: searchTerms.map((term) => Utils.uuid(term)),
+                        },
+                      },
+                      {
+                        content: {
+                          [Op.or]: searchTerms.map((term) => ({
+                            [Op.iLike]: `%${term}%`,
+                          })),
+                        },
+                      },
+                    ],
+                  }
+                : undefined,
+          },
+          ...include,
+        ];
+      }
+
+      if (filter.createdAtRange) {
+        const [start, end] = filter.createdAtRange;
+
+        if (start !== undefined && start !== null && start !== '') {
+          where = {
+            ...where,
+            ['createdAt']: {
+              ...where.createdAt,
+              [Op.gte]: start,
+            },
+          };
+        }
+
+        if (end !== undefined && end !== null && end !== '') {
+          where = {
+            ...where,
+            ['createdAt']: {
+              ...where.createdAt,
+              [Op.lte]: end,
+            },
+          };
+        }
+      }
+    }
+
+    const queryOptions = {
+      where,
+      include,
+      distinct: true,
+      order:
+        filter.field && filter.sort
+          ? [[filter.field, filter.sort]]
+          : [['createdAt', 'desc']],
+      transaction: options?.transaction,
+      logging: console.log,
+    };
+
+    if (!options?.countOnly) {
+      queryOptions.limit = limit ? Number(limit) : undefined;
+      queryOptions.offset = offset ? Number(offset) : undefined;
+    }
+
+    try {
+      const { rows, count } = await db.quizzes.findAndCountAll(queryOptions);
+
+      return {
+        rows: options?.countOnly ? [] : rows,
+        count: count,
+      };
+    } catch (error) {
+      console.error('Error executing query:', error);
+      throw error;
+    }
+  }
+
+  static async findAllAutocomplete(query, limit, offset) {
+    let where = {};
+
+    if (query) {
+      where = {
+        [Op.or]: [
+          { ['id']: Utils.uuid(query) },
+          Utils.ilike('quizzes', 'title', query),
+        ],
+      };
+    }
+
+    const records = await db.quizzes.findAll({
+      attributes: ['id', 'title'],
+      where,
+      limit: limit ? Number(limit) : undefined,
+      offset: offset ? Number(offset) : undefined,
+      orderBy: [['title', 'ASC']],
+    });
+
+    return records.map((record) => ({
+      id: record.id,
+      label: record.title,
+    }));
+  }
+};

backend/src/db/api/roles.js

@@ -0,0 +1,315 @@
+const db = require('../models');
+const FileDBApi = require('./file');
+const crypto = require('crypto');
+const Utils = require('../utils');
+
+const Sequelize = db.Sequelize;
+const Op = Sequelize.Op;
+
+module.exports = class RolesDBApi {
+  static async create(data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const roles = await db.roles.create(
+      {
+        id: data.id || undefined,
+
+        name: data.name || null,
+        role_customization: data.role_customization || null,
+        importHash: data.importHash || null,
+        createdById: currentUser.id,
+        updatedById: currentUser.id,
+      },
+      { transaction },
+    );
+
+    await roles.setPermissions(data.permissions || [], {
+      transaction,
+    });
+
+    return roles;
+  }
+
+  static async bulkImport(data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    // Prepare data - wrapping individual data transformations in a map() method
+    const rolesData = data.map((item, index) => ({
+      id: item.id || undefined,
+
+      name: item.name || null,
+      role_customization: item.role_customization || null,
+      importHash: item.importHash || null,
+      createdById: currentUser.id,
+      updatedById: currentUser.id,
+      createdAt: new Date(Date.now() + index * 1000),
+    }));
+
+    // Bulk create items
+    const roles = await db.roles.bulkCreate(rolesData, { transaction });
+
+    // For each item created, replace relation files
+
+    return roles;
+  }
+
+  static async update(id, data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const roles = await db.roles.findByPk(id, {}, { transaction });
+
+    const updatePayload = {};
+
+    if (data.name !== undefined) updatePayload.name = data.name;
+
+    if (data.role_customization !== undefined)
+      updatePayload.role_customization = data.role_customization;
+
+    updatePayload.updatedById = currentUser.id;
+
+    await roles.update(updatePayload, { transaction });
+
+    if (data.permissions !== undefined) {
+      await roles.setPermissions(data.permissions, { transaction });
+    }
+
+    return roles;
+  }
+
+  static async deleteByIds(ids, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const roles = await db.roles.findAll({
+      where: {
+        id: {
+          [Op.in]: ids,
+        },
+      },
+      transaction,
+    });
+
+    await db.sequelize.transaction(async (transaction) => {
+      for (const record of roles) {
+        await record.update({ deletedBy: currentUser.id }, { transaction });
+      }
+      for (const record of roles) {
+        await record.destroy({ transaction });
+      }
+    });
+
+    return roles;
+  }
+
+  static async remove(id, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const roles = await db.roles.findByPk(id, options);
+
+    await roles.update(
+      {
+        deletedBy: currentUser.id,
+      },
+      {
+        transaction,
+      },
+    );
+
+    await roles.destroy({
+      transaction,
+    });
+
+    return roles;
+  }
+
+  static async findBy(where, options) {
+    const transaction = (options && options.transaction) || undefined;
+
+    const roles = await db.roles.findOne({ where }, { transaction });
+
+    if (!roles) {
+      return roles;
+    }
+
+    const output = roles.get({ plain: true });
+
+    output.users_app_role = await roles.getUsers_app_role({
+      transaction,
+    });
+
+    output.permissions = await roles.getPermissions({
+      transaction,
+    });
+
+    return output;
+  }
+
+  static async findAll(filter, options) {
+    const limit = filter.limit || 0;
+    let offset = 0;
+    let where = {};
+    const currentPage = +filter.page;
+
+    offset = currentPage * limit;
+
+    const orderBy = null;
+
+    const transaction = (options && options.transaction) || undefined;
+
+    let include = [
+      {
+        model: db.permissions,
+        as: 'permissions',
+      },
+    ];
+
+    if (filter) {
+      if (filter.id) {
+        where = {
+          ...where,
+          ['id']: Utils.uuid(filter.id),
+        };
+      }
+
+      if (filter.name) {
+        where = {
+          ...where,
+          [Op.and]: Utils.ilike('roles', 'name', filter.name),
+        };
+      }
+
+      if (filter.role_customization) {
+        where = {
+          ...where,
+          [Op.and]: Utils.ilike(
+            'roles',
+            'role_customization',
+            filter.role_customization,
+          ),
+        };
+      }
+
+      if (filter.active !== undefined) {
+        where = {
+          ...where,
+          active: filter.active === true || filter.active === 'true',
+        };
+      }
+
+      if (filter.permissions) {
+        const searchTerms = filter.permissions.split('|');
+
+        include = [
+          {
+            model: db.permissions,
+            as: 'permissions_filter',
+            required: searchTerms.length > 0,
+            where:
+              searchTerms.length > 0
+                ? {
+                    [Op.or]: [
+                      {
+                        id: {
+                          [Op.in]: searchTerms.map((term) => Utils.uuid(term)),
+                        },
+                      },
+                      {
+                        name: {
+                          [Op.or]: searchTerms.map((term) => ({
+                            [Op.iLike]: `%${term}%`,
+                          })),
+                        },
+                      },
+                    ],
+                  }
+                : undefined,
+          },
+          ...include,
+        ];
+      }
+
+      if (filter.createdAtRange) {
+        const [start, end] = filter.createdAtRange;
+
+        if (start !== undefined && start !== null && start !== '') {
+          where = {
+            ...where,
+            ['createdAt']: {
+              ...where.createdAt,
+              [Op.gte]: start,
+            },
+          };
+        }
+
+        if (end !== undefined && end !== null && end !== '') {
+          where = {
+            ...where,
+            ['createdAt']: {
+              ...where.createdAt,
+              [Op.lte]: end,
+            },
+          };
+        }
+      }
+    }
+
+    const queryOptions = {
+      where,
+      include,
+      distinct: true,
+      order:
+        filter.field && filter.sort
+          ? [[filter.field, filter.sort]]
+          : [['createdAt', 'desc']],
+      transaction: options?.transaction,
+      logging: console.log,
+    };
+
+    if (!options?.countOnly) {
+      queryOptions.limit = limit ? Number(limit) : undefined;
+      queryOptions.offset = offset ? Number(offset) : undefined;
+    }
+
+    try {
+      const { rows, count } = await db.roles.findAndCountAll(queryOptions);
+
+      return {
+        rows: options?.countOnly ? [] : rows,
+        count: count,
+      };
+    } catch (error) {
+      console.error('Error executing query:', error);
+      throw error;
+    }
+  }
+
+  static async findAllAutocomplete(query, limit, offset) {
+    let where = {};
+
+    if (query) {
+      where = {
+        [Op.or]: [
+          { ['id']: Utils.uuid(query) },
+          Utils.ilike('roles', 'name', query),
+        ],
+      };
+    }
+
+    const records = await db.roles.findAll({
+      attributes: ['id', 'name'],
+      where,
+      limit: limit ? Number(limit) : undefined,
+      offset: offset ? Number(offset) : undefined,
+      orderBy: [['name', 'ASC']],
+    });
+
+    return records.map((record) => ({
+      id: record.id,
+      label: record.name,
+    }));
+  }
+};

backend/src/db/api/students.js

@@ -0,0 +1,490 @@
+const db = require('../models');
+const FileDBApi = require('./file');
+const crypto = require('crypto');
+const Utils = require('../utils');
+
+const Sequelize = db.Sequelize;
+const Op = Sequelize.Op;
+
+module.exports = class StudentsDBApi {
+  static async create(data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const students = await db.students.create(
+      {
+        id: data.id || undefined,
+
+        name: data.name || null,
+        importHash: data.importHash || null,
+        createdById: currentUser.id,
+        updatedById: currentUser.id,
+      },
+      { transaction },
+    );
+
+    await students.setUser(data.user || null, {
+      transaction,
+    });
+
+    await students.setCourses(data.courses || [], {
+      transaction,
+    });
+
+    await students.setQuizzes(data.quizzes || [], {
+      transaction,
+    });
+
+    await students.setTasks(data.tasks || [], {
+      transaction,
+    });
+
+    await students.setAchievements(data.achievements || [], {
+      transaction,
+    });
+
+    return students;
+  }
+
+  static async bulkImport(data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    // Prepare data - wrapping individual data transformations in a map() method
+    const studentsData = data.map((item, index) => ({
+      id: item.id || undefined,
+
+      name: item.name || null,
+      importHash: item.importHash || null,
+      createdById: currentUser.id,
+      updatedById: currentUser.id,
+      createdAt: new Date(Date.now() + index * 1000),
+    }));
+
+    // Bulk create items
+    const students = await db.students.bulkCreate(studentsData, {
+      transaction,
+    });
+
+    // For each item created, replace relation files
+
+    return students;
+  }
+
+  static async update(id, data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const students = await db.students.findByPk(id, {}, { transaction });
+
+    const updatePayload = {};
+
+    if (data.name !== undefined) updatePayload.name = data.name;
+
+    updatePayload.updatedById = currentUser.id;
+
+    await students.update(updatePayload, { transaction });
+
+    if (data.user !== undefined) {
+      await students.setUser(
+        data.user,
+
+        { transaction },
+      );
+    }
+
+    if (data.courses !== undefined) {
+      await students.setCourses(data.courses, { transaction });
+    }
+
+    if (data.quizzes !== undefined) {
+      await students.setQuizzes(data.quizzes, { transaction });
+    }
+
+    if (data.tasks !== undefined) {
+      await students.setTasks(data.tasks, { transaction });
+    }
+
+    if (data.achievements !== undefined) {
+      await students.setAchievements(data.achievements, { transaction });
+    }
+
+    return students;
+  }
+
+  static async deleteByIds(ids, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const students = await db.students.findAll({
+      where: {
+        id: {
+          [Op.in]: ids,
+        },
+      },
+      transaction,
+    });
+
+    await db.sequelize.transaction(async (transaction) => {
+      for (const record of students) {
+        await record.update({ deletedBy: currentUser.id }, { transaction });
+      }
+      for (const record of students) {
+        await record.destroy({ transaction });
+      }
+    });
+
+    return students;
+  }
+
+  static async remove(id, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const students = await db.students.findByPk(id, options);
+
+    await students.update(
+      {
+        deletedBy: currentUser.id,
+      },
+      {
+        transaction,
+      },
+    );
+
+    await students.destroy({
+      transaction,
+    });
+
+    return students;
+  }
+
+  static async findBy(where, options) {
+    const transaction = (options && options.transaction) || undefined;
+
+    const students = await db.students.findOne({ where }, { transaction });
+
+    if (!students) {
+      return students;
+    }
+
+    const output = students.get({ plain: true });
+
+    output.tasks_student = await students.getTasks_student({
+      transaction,
+    });
+
+    output.user = await students.getUser({
+      transaction,
+    });
+
+    output.courses = await students.getCourses({
+      transaction,
+    });
+
+    output.quizzes = await students.getQuizzes({
+      transaction,
+    });
+
+    output.tasks = await students.getTasks({
+      transaction,
+    });
+
+    output.achievements = await students.getAchievements({
+      transaction,
+    });
+
+    return output;
+  }
+
+  static async findAll(filter, options) {
+    const limit = filter.limit || 0;
+    let offset = 0;
+    let where = {};
+    const currentPage = +filter.page;
+
+    offset = currentPage * limit;
+
+    const orderBy = null;
+
+    const transaction = (options && options.transaction) || undefined;
+
+    let include = [
+      {
+        model: db.users,
+        as: 'user',
+
+        where: filter.user
+          ? {
+              [Op.or]: [
+                {
+                  id: {
+                    [Op.in]: filter.user
+                      .split('|')
+                      .map((term) => Utils.uuid(term)),
+                  },
+                },
+                {
+                  firstName: {
+                    [Op.or]: filter.user
+                      .split('|')
+                      .map((term) => ({ [Op.iLike]: `%${term}%` })),
+                  },
+                },
+              ],
+            }
+          : {},
+      },
+
+      {
+        model: db.courses,
+        as: 'courses',
+      },
+
+      {
+        model: db.quizzes,
+        as: 'quizzes',
+      },
+
+      {
+        model: db.tasks,
+        as: 'tasks',
+      },
+
+      {
+        model: db.achievements,
+        as: 'achievements',
+      },
+    ];
+
+    if (filter) {
+      if (filter.id) {
+        where = {
+          ...where,
+          ['id']: Utils.uuid(filter.id),
+        };
+      }
+
+      if (filter.name) {
+        where = {
+          ...where,
+          [Op.and]: Utils.ilike('students', 'name', filter.name),
+        };
+      }
+
+      if (filter.active !== undefined) {
+        where = {
+          ...where,
+          active: filter.active === true || filter.active === 'true',
+        };
+      }
+
+      if (filter.courses) {
+        const searchTerms = filter.courses.split('|');
+
+        include = [
+          {
+            model: db.courses,
+            as: 'courses_filter',
+            required: searchTerms.length > 0,
+            where:
+              searchTerms.length > 0
+                ? {
+                    [Op.or]: [
+                      {
+                        id: {
+                          [Op.in]: searchTerms.map((term) => Utils.uuid(term)),
+                        },
+                      },
+                      {
+                        title: {
+                          [Op.or]: searchTerms.map((term) => ({
+                            [Op.iLike]: `%${term}%`,
+                          })),
+                        },
+                      },
+                    ],
+                  }
+                : undefined,
+          },
+          ...include,
+        ];
+      }
+
+      if (filter.quizzes) {
+        const searchTerms = filter.quizzes.split('|');
+
+        include = [
+          {
+            model: db.quizzes,
+            as: 'quizzes_filter',
+            required: searchTerms.length > 0,
+            where:
+              searchTerms.length > 0
+                ? {
+                    [Op.or]: [
+                      {
+                        id: {
+                          [Op.in]: searchTerms.map((term) => Utils.uuid(term)),
+                        },
+                      },
+                      {
+                        title: {
+                          [Op.or]: searchTerms.map((term) => ({
+                            [Op.iLike]: `%${term}%`,
+                          })),
+                        },
+                      },
+                    ],
+                  }
+                : undefined,
+          },
+          ...include,
+        ];
+      }
+
+      if (filter.tasks) {
+        const searchTerms = filter.tasks.split('|');
+
+        include = [
+          {
+            model: db.tasks,
+            as: 'tasks_filter',
+            required: searchTerms.length > 0,
+            where:
+              searchTerms.length > 0
+                ? {
+                    [Op.or]: [
+                      {
+                        id: {
+                          [Op.in]: searchTerms.map((term) => Utils.uuid(term)),
+                        },
+                      },
+                      {
+                        title: {
+                          [Op.or]: searchTerms.map((term) => ({
+                            [Op.iLike]: `%${term}%`,
+                          })),
+                        },
+                      },
+                    ],
+                  }
+                : undefined,
+          },
+          ...include,
+        ];
+      }
+
+      if (filter.achievements) {
+        const searchTerms = filter.achievements.split('|');
+
+        include = [
+          {
+            model: db.achievements,
+            as: 'achievements_filter',
+            required: searchTerms.length > 0,
+            where:
+              searchTerms.length > 0
+                ? {
+                    [Op.or]: [
+                      {
+                        id: {
+                          [Op.in]: searchTerms.map((term) => Utils.uuid(term)),
+                        },
+                      },
+                      {
+                        name: {
+                          [Op.or]: searchTerms.map((term) => ({
+                            [Op.iLike]: `%${term}%`,
+                          })),
+                        },
+                      },
+                    ],
+                  }
+                : undefined,
+          },
+          ...include,
+        ];
+      }
+
+      if (filter.createdAtRange) {
+        const [start, end] = filter.createdAtRange;
+
+        if (start !== undefined && start !== null && start !== '') {
+          where = {
+            ...where,
+            ['createdAt']: {
+              ...where.createdAt,
+              [Op.gte]: start,
+            },
+          };
+        }
+
+        if (end !== undefined && end !== null && end !== '') {
+          where = {
+            ...where,
+            ['createdAt']: {
+              ...where.createdAt,
+              [Op.lte]: end,
+            },
+          };
+        }
+      }
+    }
+
+    const queryOptions = {
+      where,
+      include,
+      distinct: true,
+      order:
+        filter.field && filter.sort
+          ? [[filter.field, filter.sort]]
+          : [['createdAt', 'desc']],
+      transaction: options?.transaction,
+      logging: console.log,
+    };
+
+    if (!options?.countOnly) {
+      queryOptions.limit = limit ? Number(limit) : undefined;
+      queryOptions.offset = offset ? Number(offset) : undefined;
+    }
+
+    try {
+      const { rows, count } = await db.students.findAndCountAll(queryOptions);
+
+      return {
+        rows: options?.countOnly ? [] : rows,
+        count: count,
+      };
+    } catch (error) {
+      console.error('Error executing query:', error);
+      throw error;
+    }
+  }
+
+  static async findAllAutocomplete(query, limit, offset) {
+    let where = {};
+
+    if (query) {
+      where = {
+        [Op.or]: [
+          { ['id']: Utils.uuid(query) },
+          Utils.ilike('students', 'name', query),
+        ],
+      };
+    }
+
+    const records = await db.students.findAll({
+      attributes: ['id', 'name'],
+      where,
+      limit: limit ? Number(limit) : undefined,
+      offset: offset ? Number(offset) : undefined,
+      orderBy: [['name', 'ASC']],
+    });
+
+    return records.map((record) => ({
+      id: record.id,
+      label: record.name,
+    }));
+  }
+};

backend/src/db/api/tasks.js

@@ -0,0 +1,334 @@
+const db = require('../models');
+const FileDBApi = require('./file');
+const crypto = require('crypto');
+const Utils = require('../utils');
+
+const Sequelize = db.Sequelize;
+const Op = Sequelize.Op;
+
+module.exports = class TasksDBApi {
+  static async create(data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const tasks = await db.tasks.create(
+      {
+        id: data.id || undefined,
+
+        title: data.title || null,
+        due_date: data.due_date || null,
+        importHash: data.importHash || null,
+        createdById: currentUser.id,
+        updatedById: currentUser.id,
+      },
+      { transaction },
+    );
+
+    await tasks.setStudent(data.student || null, {
+      transaction,
+    });
+
+    return tasks;
+  }
+
+  static async bulkImport(data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    // Prepare data - wrapping individual data transformations in a map() method
+    const tasksData = data.map((item, index) => ({
+      id: item.id || undefined,
+
+      title: item.title || null,
+      due_date: item.due_date || null,
+      importHash: item.importHash || null,
+      createdById: currentUser.id,
+      updatedById: currentUser.id,
+      createdAt: new Date(Date.now() + index * 1000),
+    }));
+
+    // Bulk create items
+    const tasks = await db.tasks.bulkCreate(tasksData, { transaction });
+
+    // For each item created, replace relation files
+
+    return tasks;
+  }
+
+  static async update(id, data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const tasks = await db.tasks.findByPk(id, {}, { transaction });
+
+    const updatePayload = {};
+
+    if (data.title !== undefined) updatePayload.title = data.title;
+
+    if (data.due_date !== undefined) updatePayload.due_date = data.due_date;
+
+    updatePayload.updatedById = currentUser.id;
+
+    await tasks.update(updatePayload, { transaction });
+
+    if (data.student !== undefined) {
+      await tasks.setStudent(
+        data.student,
+
+        { transaction },
+      );
+    }
+
+    return tasks;
+  }
+
+  static async deleteByIds(ids, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const tasks = await db.tasks.findAll({
+      where: {
+        id: {
+          [Op.in]: ids,
+        },
+      },
+      transaction,
+    });
+
+    await db.sequelize.transaction(async (transaction) => {
+      for (const record of tasks) {
+        await record.update({ deletedBy: currentUser.id }, { transaction });
+      }
+      for (const record of tasks) {
+        await record.destroy({ transaction });
+      }
+    });
+
+    return tasks;
+  }
+
+  static async remove(id, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const tasks = await db.tasks.findByPk(id, options);
+
+    await tasks.update(
+      {
+        deletedBy: currentUser.id,
+      },
+      {
+        transaction,
+      },
+    );
+
+    await tasks.destroy({
+      transaction,
+    });
+
+    return tasks;
+  }
+
+  static async findBy(where, options) {
+    const transaction = (options && options.transaction) || undefined;
+
+    const tasks = await db.tasks.findOne({ where }, { transaction });
+
+    if (!tasks) {
+      return tasks;
+    }
+
+    const output = tasks.get({ plain: true });
+
+    output.student = await tasks.getStudent({
+      transaction,
+    });
+
+    return output;
+  }
+
+  static async findAll(filter, options) {
+    const limit = filter.limit || 0;
+    let offset = 0;
+    let where = {};
+    const currentPage = +filter.page;
+
+    offset = currentPage * limit;
+
+    const orderBy = null;
+
+    const transaction = (options && options.transaction) || undefined;
+
+    let include = [
+      {
+        model: db.students,
+        as: 'student',
+
+        where: filter.student
+          ? {
+              [Op.or]: [
+                {
+                  id: {
+                    [Op.in]: filter.student
+                      .split('|')
+                      .map((term) => Utils.uuid(term)),
+                  },
+                },
+                {
+                  name: {
+                    [Op.or]: filter.student
+                      .split('|')
+                      .map((term) => ({ [Op.iLike]: `%${term}%` })),
+                  },
+                },
+              ],
+            }
+          : {},
+      },
+    ];
+
+    if (filter) {
+      if (filter.id) {
+        where = {
+          ...where,
+          ['id']: Utils.uuid(filter.id),
+        };
+      }
+
+      if (filter.title) {
+        where = {
+          ...where,
+          [Op.and]: Utils.ilike('tasks', 'title', filter.title),
+        };
+      }
+
+      if (filter.calendarStart && filter.calendarEnd) {
+        where = {
+          ...where,
+          [Op.or]: [
+            {
+              due_date: {
+                [Op.between]: [filter.calendarStart, filter.calendarEnd],
+              },
+            },
+            {
+              due_date: {
+                [Op.between]: [filter.calendarStart, filter.calendarEnd],
+              },
+            },
+          ],
+        };
+      }
+
+      if (filter.due_dateRange) {
+        const [start, end] = filter.due_dateRange;
+
+        if (start !== undefined && start !== null && start !== '') {
+          where = {
+            ...where,
+            due_date: {
+              ...where.due_date,
+              [Op.gte]: start,
+            },
+          };
+        }
+
+        if (end !== undefined && end !== null && end !== '') {
+          where = {
+            ...where,
+            due_date: {
+              ...where.due_date,
+              [Op.lte]: end,
+            },
+          };
+        }
+      }
+
+      if (filter.active !== undefined) {
+        where = {
+          ...where,
+          active: filter.active === true || filter.active === 'true',
+        };
+      }
+
+      if (filter.createdAtRange) {
+        const [start, end] = filter.createdAtRange;
+
+        if (start !== undefined && start !== null && start !== '') {
+          where = {
+            ...where,
+            ['createdAt']: {
+              ...where.createdAt,
+              [Op.gte]: start,
+            },
+          };
+        }
+
+        if (end !== undefined && end !== null && end !== '') {
+          where = {
+            ...where,
+            ['createdAt']: {
+              ...where.createdAt,
+              [Op.lte]: end,
+            },
+          };
+        }
+      }
+    }
+
+    const queryOptions = {
+      where,
+      include,
+      distinct: true,
+      order:
+        filter.field && filter.sort
+          ? [[filter.field, filter.sort]]
+          : [['createdAt', 'desc']],
+      transaction: options?.transaction,
+      logging: console.log,
+    };
+
+    if (!options?.countOnly) {
+      queryOptions.limit = limit ? Number(limit) : undefined;
+      queryOptions.offset = offset ? Number(offset) : undefined;
+    }
+
+    try {
+      const { rows, count } = await db.tasks.findAndCountAll(queryOptions);
+
+      return {
+        rows: options?.countOnly ? [] : rows,
+        count: count,
+      };
+    } catch (error) {
+      console.error('Error executing query:', error);
+      throw error;
+    }
+  }
+
+  static async findAllAutocomplete(query, limit, offset) {
+    let where = {};
+
+    if (query) {
+      where = {
+        [Op.or]: [
+          { ['id']: Utils.uuid(query) },
+          Utils.ilike('tasks', 'title', query),
+        ],
+      };
+    }
+
+    const records = await db.tasks.findAll({
+      attributes: ['id', 'title'],
+      where,
+      limit: limit ? Number(limit) : undefined,
+      offset: offset ? Number(offset) : undefined,
+      orderBy: [['title', 'ASC']],
+    });
+
+    return records.map((record) => ({
+      id: record.id,
+      label: record.title,
+    }));
+  }
+};

backend/src/db/api/teachers.js

@@ -0,0 +1,392 @@
+const db = require('../models');
+const FileDBApi = require('./file');
+const crypto = require('crypto');
+const Utils = require('../utils');
+
+const Sequelize = db.Sequelize;
+const Op = Sequelize.Op;
+
+module.exports = class TeachersDBApi {
+  static async create(data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const teachers = await db.teachers.create(
+      {
+        id: data.id || undefined,
+
+        name: data.name || null,
+        importHash: data.importHash || null,
+        createdById: currentUser.id,
+        updatedById: currentUser.id,
+      },
+      { transaction },
+    );
+
+    await teachers.setUser(data.user || null, {
+      transaction,
+    });
+
+    await teachers.setCourses(data.courses || [], {
+      transaction,
+    });
+
+    await teachers.setQuizzes(data.quizzes || [], {
+      transaction,
+    });
+
+    return teachers;
+  }
+
+  static async bulkImport(data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    // Prepare data - wrapping individual data transformations in a map() method
+    const teachersData = data.map((item, index) => ({
+      id: item.id || undefined,
+
+      name: item.name || null,
+      importHash: item.importHash || null,
+      createdById: currentUser.id,
+      updatedById: currentUser.id,
+      createdAt: new Date(Date.now() + index * 1000),
+    }));
+
+    // Bulk create items
+    const teachers = await db.teachers.bulkCreate(teachersData, {
+      transaction,
+    });
+
+    // For each item created, replace relation files
+
+    return teachers;
+  }
+
+  static async update(id, data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const teachers = await db.teachers.findByPk(id, {}, { transaction });
+
+    const updatePayload = {};
+
+    if (data.name !== undefined) updatePayload.name = data.name;
+
+    updatePayload.updatedById = currentUser.id;
+
+    await teachers.update(updatePayload, { transaction });
+
+    if (data.user !== undefined) {
+      await teachers.setUser(
+        data.user,
+
+        { transaction },
+      );
+    }
+
+    if (data.courses !== undefined) {
+      await teachers.setCourses(data.courses, { transaction });
+    }
+
+    if (data.quizzes !== undefined) {
+      await teachers.setQuizzes(data.quizzes, { transaction });
+    }
+
+    return teachers;
+  }
+
+  static async deleteByIds(ids, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const teachers = await db.teachers.findAll({
+      where: {
+        id: {
+          [Op.in]: ids,
+        },
+      },
+      transaction,
+    });
+
+    await db.sequelize.transaction(async (transaction) => {
+      for (const record of teachers) {
+        await record.update({ deletedBy: currentUser.id }, { transaction });
+      }
+      for (const record of teachers) {
+        await record.destroy({ transaction });
+      }
+    });
+
+    return teachers;
+  }
+
+  static async remove(id, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const teachers = await db.teachers.findByPk(id, options);
+
+    await teachers.update(
+      {
+        deletedBy: currentUser.id,
+      },
+      {
+        transaction,
+      },
+    );
+
+    await teachers.destroy({
+      transaction,
+    });
+
+    return teachers;
+  }
+
+  static async findBy(where, options) {
+    const transaction = (options && options.transaction) || undefined;
+
+    const teachers = await db.teachers.findOne({ where }, { transaction });
+
+    if (!teachers) {
+      return teachers;
+    }
+
+    const output = teachers.get({ plain: true });
+
+    output.courses_teacher = await teachers.getCourses_teacher({
+      transaction,
+    });
+
+    output.user = await teachers.getUser({
+      transaction,
+    });
+
+    output.courses = await teachers.getCourses({
+      transaction,
+    });
+
+    output.quizzes = await teachers.getQuizzes({
+      transaction,
+    });
+
+    return output;
+  }
+
+  static async findAll(filter, options) {
+    const limit = filter.limit || 0;
+    let offset = 0;
+    let where = {};
+    const currentPage = +filter.page;
+
+    offset = currentPage * limit;
+
+    const orderBy = null;
+
+    const transaction = (options && options.transaction) || undefined;
+
+    let include = [
+      {
+        model: db.users,
+        as: 'user',
+
+        where: filter.user
+          ? {
+              [Op.or]: [
+                {
+                  id: {
+                    [Op.in]: filter.user
+                      .split('|')
+                      .map((term) => Utils.uuid(term)),
+                  },
+                },
+                {
+                  firstName: {
+                    [Op.or]: filter.user
+                      .split('|')
+                      .map((term) => ({ [Op.iLike]: `%${term}%` })),
+                  },
+                },
+              ],
+            }
+          : {},
+      },
+
+      {
+        model: db.courses,
+        as: 'courses',
+      },
+
+      {
+        model: db.quizzes,
+        as: 'quizzes',
+      },
+    ];
+
+    if (filter) {
+      if (filter.id) {
+        where = {
+          ...where,
+          ['id']: Utils.uuid(filter.id),
+        };
+      }
+
+      if (filter.name) {
+        where = {
+          ...where,
+          [Op.and]: Utils.ilike('teachers', 'name', filter.name),
+        };
+      }
+
+      if (filter.active !== undefined) {
+        where = {
+          ...where,
+          active: filter.active === true || filter.active === 'true',
+        };
+      }
+
+      if (filter.courses) {
+        const searchTerms = filter.courses.split('|');
+
+        include = [
+          {
+            model: db.courses,
+            as: 'courses_filter',
+            required: searchTerms.length > 0,
+            where:
+              searchTerms.length > 0
+                ? {
+                    [Op.or]: [
+                      {
+                        id: {
+                          [Op.in]: searchTerms.map((term) => Utils.uuid(term)),
+                        },
+                      },
+                      {
+                        title: {
+                          [Op.or]: searchTerms.map((term) => ({
+                            [Op.iLike]: `%${term}%`,
+                          })),
+                        },
+                      },
+                    ],
+                  }
+                : undefined,
+          },
+          ...include,
+        ];
+      }
+
+      if (filter.quizzes) {
+        const searchTerms = filter.quizzes.split('|');
+
+        include = [
+          {
+            model: db.quizzes,
+            as: 'quizzes_filter',
+            required: searchTerms.length > 0,
+            where:
+              searchTerms.length > 0
+                ? {
+                    [Op.or]: [
+                      {
+                        id: {
+                          [Op.in]: searchTerms.map((term) => Utils.uuid(term)),
+                        },
+                      },
+                      {
+                        title: {
+                          [Op.or]: searchTerms.map((term) => ({
+                            [Op.iLike]: `%${term}%`,
+                          })),
+                        },
+                      },
+                    ],
+                  }
+                : undefined,
+          },
+          ...include,
+        ];
+      }
+
+      if (filter.createdAtRange) {
+        const [start, end] = filter.createdAtRange;
+
+        if (start !== undefined && start !== null && start !== '') {
+          where = {
+            ...where,
+            ['createdAt']: {
+              ...where.createdAt,
+              [Op.gte]: start,
+            },
+          };
+        }
+
+        if (end !== undefined && end !== null && end !== '') {
+          where = {
+            ...where,
+            ['createdAt']: {
+              ...where.createdAt,
+              [Op.lte]: end,
+            },
+          };
+        }
+      }
+    }
+
+    const queryOptions = {
+      where,
+      include,
+      distinct: true,
+      order:
+        filter.field && filter.sort
+          ? [[filter.field, filter.sort]]
+          : [['createdAt', 'desc']],
+      transaction: options?.transaction,
+      logging: console.log,
+    };
+
+    if (!options?.countOnly) {
+      queryOptions.limit = limit ? Number(limit) : undefined;
+      queryOptions.offset = offset ? Number(offset) : undefined;
+    }
+
+    try {
+      const { rows, count } = await db.teachers.findAndCountAll(queryOptions);
+
+      return {
+        rows: options?.countOnly ? [] : rows,
+        count: count,
+      };
+    } catch (error) {
+      console.error('Error executing query:', error);
+      throw error;
+    }
+  }
+
+  static async findAllAutocomplete(query, limit, offset) {
+    let where = {};
+
+    if (query) {
+      where = {
+        [Op.or]: [
+          { ['id']: Utils.uuid(query) },
+          Utils.ilike('teachers', 'name', query),
+        ],
+      };
+    }
+
+    const records = await db.teachers.findAll({
+      attributes: ['id', 'name'],
+      where,
+      limit: limit ? Number(limit) : undefined,
+      offset: offset ? Number(offset) : undefined,
+      orderBy: [['name', 'ASC']],
+    });
+
+    return records.map((record) => ({
+      id: record.id,
+      label: record.name,
+    }));
+  }
+};

backend/src/db/api/users.js

@@ -0,0 +1,754 @@
+const db = require('../models');
+const FileDBApi = require('./file');
+const crypto = require('crypto');
+const Utils = require('../utils');
+
+const bcrypt = require('bcrypt');
+const config = require('../../config');
+
+const Sequelize = db.Sequelize;
+const Op = Sequelize.Op;
+
+module.exports = class UsersDBApi {
+  static async create(data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const users = await db.users.create(
+      {
+        id: data.data.id || undefined,
+
+        firstName: data.data.firstName || null,
+        lastName: data.data.lastName || null,
+        phoneNumber: data.data.phoneNumber || null,
+        email: data.data.email || null,
+        disabled: data.data.disabled || false,
+
+        password: data.data.password || null,
+        emailVerified: data.data.emailVerified || true,
+
+        emailVerificationToken: data.data.emailVerificationToken || null,
+        emailVerificationTokenExpiresAt:
+          data.data.emailVerificationTokenExpiresAt || null,
+        passwordResetToken: data.data.passwordResetToken || null,
+        passwordResetTokenExpiresAt:
+          data.data.passwordResetTokenExpiresAt || null,
+        provider: data.data.provider || null,
+        importHash: data.data.importHash || null,
+        createdById: currentUser.id,
+        updatedById: currentUser.id,
+      },
+      { transaction },
+    );
+
+    if (!data.data.app_role) {
+      const role = await db.roles.findOne({
+        where: { name: 'User' },
+      });
+      if (role) {
+        await users.setApp_role(role, {
+          transaction,
+        });
+      }
+    } else {
+      await users.setApp_role(data.data.app_role || null, {
+        transaction,
+      });
+    }
+
+    await users.setCustom_permissions(data.data.custom_permissions || [], {
+      transaction,
+    });
+
+    await FileDBApi.replaceRelationFiles(
+      {
+        belongsTo: db.users.getTableName(),
+        belongsToColumn: 'avatar',
+        belongsToId: users.id,
+      },
+      data.data.avatar,
+      options,
+    );
+
+    return users;
+  }
+
+  static async bulkImport(data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    // Prepare data - wrapping individual data transformations in a map() method
+    const usersData = data.map((item, index) => ({
+      id: item.id || undefined,
+
+      firstName: item.firstName || null,
+      lastName: item.lastName || null,
+      phoneNumber: item.phoneNumber || null,
+      email: item.email || null,
+      disabled: item.disabled || false,
+
+      password: item.password || null,
+      emailVerified: item.emailVerified || false,
+
+      emailVerificationToken: item.emailVerificationToken || null,
+      emailVerificationTokenExpiresAt:
+        item.emailVerificationTokenExpiresAt || null,
+      passwordResetToken: item.passwordResetToken || null,
+      passwordResetTokenExpiresAt: item.passwordResetTokenExpiresAt || null,
+      provider: item.provider || null,
+      importHash: item.importHash || null,
+      createdById: currentUser.id,
+      updatedById: currentUser.id,
+      createdAt: new Date(Date.now() + index * 1000),
+    }));
+
+    // Bulk create items
+    const users = await db.users.bulkCreate(usersData, { transaction });
+
+    // For each item created, replace relation files
+
+    for (let i = 0; i < users.length; i++) {
+      await FileDBApi.replaceRelationFiles(
+        {
+          belongsTo: db.users.getTableName(),
+          belongsToColumn: 'avatar',
+          belongsToId: users[i].id,
+        },
+        data[i].avatar,
+        options,
+      );
+    }
+
+    return users;
+  }
+
+  static async update(id, data, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const users = await db.users.findByPk(id, {}, { transaction });
+
+    if (!data?.app_role) {
+      data.app_role = users?.app_role?.id;
+    }
+    if (!data?.custom_permissions) {
+      data.custom_permissions = users?.custom_permissions?.map(
+        (item) => item.id,
+      );
+    }
+
+    if (data.password) {
+      data.password = bcrypt.hashSync(data.password, config.bcrypt.saltRounds);
+    } else {
+      data.password = users.password;
+    }
+
+    const updatePayload = {};
+
+    if (data.firstName !== undefined) updatePayload.firstName = data.firstName;
+
+    if (data.lastName !== undefined) updatePayload.lastName = data.lastName;
+
+    if (data.phoneNumber !== undefined)
+      updatePayload.phoneNumber = data.phoneNumber;
+
+    if (data.email !== undefined) updatePayload.email = data.email;
+
+    if (data.disabled !== undefined) updatePayload.disabled = data.disabled;
+
+    if (data.password !== undefined) updatePayload.password = data.password;
+
+    if (data.emailVerified !== undefined)
+      updatePayload.emailVerified = data.emailVerified;
+    else updatePayload.emailVerified = true;
+
+    if (data.emailVerificationToken !== undefined)
+      updatePayload.emailVerificationToken = data.emailVerificationToken;
+
+    if (data.emailVerificationTokenExpiresAt !== undefined)
+      updatePayload.emailVerificationTokenExpiresAt =
+        data.emailVerificationTokenExpiresAt;
+
+    if (data.passwordResetToken !== undefined)
+      updatePayload.passwordResetToken = data.passwordResetToken;
+
+    if (data.passwordResetTokenExpiresAt !== undefined)
+      updatePayload.passwordResetTokenExpiresAt =
+        data.passwordResetTokenExpiresAt;
+
+    if (data.provider !== undefined) updatePayload.provider = data.provider;
+
+    updatePayload.updatedById = currentUser.id;
+
+    await users.update(updatePayload, { transaction });
+
+    if (data.app_role !== undefined) {
+      await users.setApp_role(
+        data.app_role,
+
+        { transaction },
+      );
+    }
+
+    if (data.custom_permissions !== undefined) {
+      await users.setCustom_permissions(data.custom_permissions, {
+        transaction,
+      });
+    }
+
+    await FileDBApi.replaceRelationFiles(
+      {
+        belongsTo: db.users.getTableName(),
+        belongsToColumn: 'avatar',
+        belongsToId: users.id,
+      },
+      data.avatar,
+      options,
+    );
+
+    return users;
+  }
+
+  static async deleteByIds(ids, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const users = await db.users.findAll({
+      where: {
+        id: {
+          [Op.in]: ids,
+        },
+      },
+      transaction,
+    });
+
+    await db.sequelize.transaction(async (transaction) => {
+      for (const record of users) {
+        await record.update({ deletedBy: currentUser.id }, { transaction });
+      }
+      for (const record of users) {
+        await record.destroy({ transaction });
+      }
+    });
+
+    return users;
+  }
+
+  static async remove(id, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const users = await db.users.findByPk(id, options);
+
+    await users.update(
+      {
+        deletedBy: currentUser.id,
+      },
+      {
+        transaction,
+      },
+    );
+
+    await users.destroy({
+      transaction,
+    });
+
+    return users;
+  }
+
+  static async findBy(where, options) {
+    const transaction = (options && options.transaction) || undefined;
+
+    const users = await db.users.findOne({ where }, { transaction });
+
+    if (!users) {
+      return users;
+    }
+
+    const output = users.get({ plain: true });
+
+    output.parents_user = await users.getParents_user({
+      transaction,
+    });
+
+    output.students_user = await users.getStudents_user({
+      transaction,
+    });
+
+    output.teachers_user = await users.getTeachers_user({
+      transaction,
+    });
+
+    output.avatar = await users.getAvatar({
+      transaction,
+    });
+
+    output.app_role = await users.getApp_role({
+      transaction,
+    });
+
+    if (output.app_role) {
+      output.app_role_permissions = await output.app_role.getPermissions({
+        transaction,
+      });
+    }
+
+    output.custom_permissions = await users.getCustom_permissions({
+      transaction,
+    });
+
+    return output;
+  }
+
+  static async findAll(filter, options) {
+    const limit = filter.limit || 0;
+    let offset = 0;
+    let where = {};
+    const currentPage = +filter.page;
+
+    offset = currentPage * limit;
+
+    const orderBy = null;
+
+    const transaction = (options && options.transaction) || undefined;
+
+    let include = [
+      {
+        model: db.roles,
+        as: 'app_role',
+
+        where: filter.app_role
+          ? {
+              [Op.or]: [
+                {
+                  id: {
+                    [Op.in]: filter.app_role
+                      .split('|')
+                      .map((term) => Utils.uuid(term)),
+                  },
+                },
+                {
+                  name: {
+                    [Op.or]: filter.app_role
+                      .split('|')
+                      .map((term) => ({ [Op.iLike]: `%${term}%` })),
+                  },
+                },
+              ],
+            }
+          : {},
+      },
+
+      {
+        model: db.permissions,
+        as: 'custom_permissions',
+      },
+
+      {
+        model: db.file,
+        as: 'avatar',
+      },
+    ];
+
+    if (filter) {
+      if (filter.id) {
+        where = {
+          ...where,
+          ['id']: Utils.uuid(filter.id),
+        };
+      }
+
+      if (filter.firstName) {
+        where = {
+          ...where,
+          [Op.and]: Utils.ilike('users', 'firstName', filter.firstName),
+        };
+      }
+
+      if (filter.lastName) {
+        where = {
+          ...where,
+          [Op.and]: Utils.ilike('users', 'lastName', filter.lastName),
+        };
+      }
+
+      if (filter.phoneNumber) {
+        where = {
+          ...where,
+          [Op.and]: Utils.ilike('users', 'phoneNumber', filter.phoneNumber),
+        };
+      }
+
+      if (filter.email) {
+        where = {
+          ...where,
+          [Op.and]: Utils.ilike('users', 'email', filter.email),
+        };
+      }
+
+      if (filter.password) {
+        where = {
+          ...where,
+          [Op.and]: Utils.ilike('users', 'password', filter.password),
+        };
+      }
+
+      if (filter.emailVerificationToken) {
+        where = {
+          ...where,
+          [Op.and]: Utils.ilike(
+            'users',
+            'emailVerificationToken',
+            filter.emailVerificationToken,
+          ),
+        };
+      }
+
+      if (filter.passwordResetToken) {
+        where = {
+          ...where,
+          [Op.and]: Utils.ilike(
+            'users',
+            'passwordResetToken',
+            filter.passwordResetToken,
+          ),
+        };
+      }
+
+      if (filter.provider) {
+        where = {
+          ...where,
+          [Op.and]: Utils.ilike('users', 'provider', filter.provider),
+        };
+      }
+
+      if (filter.emailVerificationTokenExpiresAtRange) {
+        const [start, end] = filter.emailVerificationTokenExpiresAtRange;
+
+        if (start !== undefined && start !== null && start !== '') {
+          where = {
+            ...where,
+            emailVerificationTokenExpiresAt: {
+              ...where.emailVerificationTokenExpiresAt,
+              [Op.gte]: start,
+            },
+          };
+        }
+
+        if (end !== undefined && end !== null && end !== '') {
+          where = {
+            ...where,
+            emailVerificationTokenExpiresAt: {
+              ...where.emailVerificationTokenExpiresAt,
+              [Op.lte]: end,
+            },
+          };
+        }
+      }
+
+      if (filter.passwordResetTokenExpiresAtRange) {
+        const [start, end] = filter.passwordResetTokenExpiresAtRange;
+
+        if (start !== undefined && start !== null && start !== '') {
+          where = {
+            ...where,
+            passwordResetTokenExpiresAt: {
+              ...where.passwordResetTokenExpiresAt,
+              [Op.gte]: start,
+            },
+          };
+        }
+
+        if (end !== undefined && end !== null && end !== '') {
+          where = {
+            ...where,
+            passwordResetTokenExpiresAt: {
+              ...where.passwordResetTokenExpiresAt,
+              [Op.lte]: end,
+            },
+          };
+        }
+      }
+
+      if (filter.active !== undefined) {
+        where = {
+          ...where,
+          active: filter.active === true || filter.active === 'true',
+        };
+      }
+
+      if (filter.disabled) {
+        where = {
+          ...where,
+          disabled: filter.disabled,
+        };
+      }
+
+      if (filter.emailVerified) {
+        where = {
+          ...where,
+          emailVerified: filter.emailVerified,
+        };
+      }
+
+      if (filter.custom_permissions) {
+        const searchTerms = filter.custom_permissions.split('|');
+
+        include = [
+          {
+            model: db.permissions,
+            as: 'custom_permissions_filter',
+            required: searchTerms.length > 0,
+            where:
+              searchTerms.length > 0
+                ? {
+                    [Op.or]: [
+                      {
+                        id: {
+                          [Op.in]: searchTerms.map((term) => Utils.uuid(term)),
+                        },
+                      },
+                      {
+                        name: {
+                          [Op.or]: searchTerms.map((term) => ({
+                            [Op.iLike]: `%${term}%`,
+                          })),
+                        },
+                      },
+                    ],
+                  }
+                : undefined,
+          },
+          ...include,
+        ];
+      }
+
+      if (filter.createdAtRange) {
+        const [start, end] = filter.createdAtRange;
+
+        if (start !== undefined && start !== null && start !== '') {
+          where = {
+            ...where,
+            ['createdAt']: {
+              ...where.createdAt,
+              [Op.gte]: start,
+            },
+          };
+        }
+
+        if (end !== undefined && end !== null && end !== '') {
+          where = {
+            ...where,
+            ['createdAt']: {
+              ...where.createdAt,
+              [Op.lte]: end,
+            },
+          };
+        }
+      }
+    }
+
+    const queryOptions = {
+      where,
+      include,
+      distinct: true,
+      order:
+        filter.field && filter.sort
+          ? [[filter.field, filter.sort]]
+          : [['createdAt', 'desc']],
+      transaction: options?.transaction,
+      logging: console.log,
+    };
+
+    if (!options?.countOnly) {
+      queryOptions.limit = limit ? Number(limit) : undefined;
+      queryOptions.offset = offset ? Number(offset) : undefined;
+    }
+
+    try {
+      const { rows, count } = await db.users.findAndCountAll(queryOptions);
+
+      return {
+        rows: options?.countOnly ? [] : rows,
+        count: count,
+      };
+    } catch (error) {
+      console.error('Error executing query:', error);
+      throw error;
+    }
+  }
+
+  static async findAllAutocomplete(query, limit, offset) {
+    let where = {};
+
+    if (query) {
+      where = {
+        [Op.or]: [
+          { ['id']: Utils.uuid(query) },
+          Utils.ilike('users', 'firstName', query),
+        ],
+      };
+    }
+
+    const records = await db.users.findAll({
+      attributes: ['id', 'firstName'],
+      where,
+      limit: limit ? Number(limit) : undefined,
+      offset: offset ? Number(offset) : undefined,
+      orderBy: [['firstName', 'ASC']],
+    });
+
+    return records.map((record) => ({
+      id: record.id,
+      label: record.firstName,
+    }));
+  }
+
+  static async createFromAuth(data, options) {
+    const transaction = (options && options.transaction) || undefined;
+    const users = await db.users.create(
+      {
+        email: data.email,
+        firstName: data.firstName,
+        authenticationUid: data.authenticationUid,
+        password: data.password,
+      },
+      { transaction },
+    );
+
+    const app_role = await db.roles.findOne({
+      where: { name: 'User' },
+    });
+    if (app_role?.id) {
+      await users.setApp_role(app_role?.id || null, {
+        transaction,
+      });
+    }
+
+    await users.update(
+      {
+        authenticationUid: users.id,
+      },
+      { transaction },
+    );
+
+    delete users.password;
+    return users;
+  }
+
+  static async updatePassword(id, password, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+
+    const transaction = (options && options.transaction) || undefined;
+
+    const users = await db.users.findByPk(id, {
+      transaction,
+    });
+
+    await users.update(
+      {
+        password,
+        authenticationUid: id,
+        updatedById: currentUser.id,
+      },
+      { transaction },
+    );
+
+    return users;
+  }
+
+  static async generateEmailVerificationToken(email, options) {
+    return this._generateToken(
+      ['emailVerificationToken', 'emailVerificationTokenExpiresAt'],
+      email,
+      options,
+    );
+  }
+
+  static async generatePasswordResetToken(email, options) {
+    return this._generateToken(
+      ['passwordResetToken', 'passwordResetTokenExpiresAt'],
+      email,
+      options,
+    );
+  }
+
+  static async findByPasswordResetToken(token, options) {
+    const transaction = (options && options.transaction) || undefined;
+
+    return db.users.findOne(
+      {
+        where: {
+          passwordResetToken: token,
+          passwordResetTokenExpiresAt: {
+            [db.Sequelize.Op.gt]: Date.now(),
+          },
+        },
+      },
+      { transaction },
+    );
+  }
+
+  static async findByEmailVerificationToken(token, options) {
+    const transaction = (options && options.transaction) || undefined;
+    return db.users.findOne(
+      {
+        where: {
+          emailVerificationToken: token,
+          emailVerificationTokenExpiresAt: {
+            [db.Sequelize.Op.gt]: Date.now(),
+          },
+        },
+      },
+      { transaction },
+    );
+  }
+
+  static async markEmailVerified(id, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+
+    const users = await db.users.findByPk(id, {
+      transaction,
+    });
+
+    await users.update(
+      {
+        emailVerified: true,
+        updatedById: currentUser.id,
+      },
+      { transaction },
+    );
+
+    return true;
+  }
+
+  static async _generateToken(keyNames, email, options) {
+    const currentUser = (options && options.currentUser) || { id: null };
+    const transaction = (options && options.transaction) || undefined;
+    const users = await db.users.findOne(
+      {
+        where: { email: email.toLowerCase() },
+      },
+      {
+        transaction,
+      },
+    );
+
+    const token = crypto.randomBytes(20).toString('hex');
+    const tokenExpiresAt = Date.now() + 360000;
+
+    if (users) {
+      await users.update(
+        {
+          [keyNames[0]]: token,
+          [keyNames[1]]: tokenExpiresAt,
+          updatedById: currentUser.id,
+        },
+        { transaction },
+      );
+    }
+
+    return token;
+  }
+};

backend/src/db/db.config.js

@@ -0,0 +1,31 @@
+module.exports = {
+  production: {
+    dialect: 'postgres',
+    username: process.env.DB_USER,
+    password: process.env.DB_PASS,
+    database: process.env.DB_NAME,
+    host: process.env.DB_HOST,
+    port: process.env.DB_PORT,
+    logging: console.log,
+    seederStorage: 'sequelize',
+  },
+  development: {
+    username: 'postgres',
+    dialect: 'postgres',
+    password: '',
+    database: 'db_student_learner',
+    host: process.env.DB_HOST || 'localhost',
+    logging: console.log,
+    seederStorage: 'sequelize',
+  },
+  dev_stage: {
+    dialect: 'postgres',
+    username: process.env.DB_USER,
+    password: process.env.DB_PASS,
+    database: process.env.DB_NAME,
+    host: process.env.DB_HOST,
+    port: process.env.DB_PORT,
+    logging: console.log,
+    seederStorage: 'sequelize',
+  },
+};

backend/src/db/migrations/1741182468346.js

@@ -0,0 +1,940 @@
+module.exports = {
+  /**
+   * @param {QueryInterface} queryInterface
+   * @param {Sequelize} Sequelize
+   * @returns {Promise<void>}
+   */
+  async up(queryInterface, Sequelize) {
+    /**
+     * @type {Transaction}
+     */
+    const transaction = await queryInterface.sequelize.transaction();
+    try {
+      await queryInterface.createTable(
+        'users',
+        {
+          id: {
+            type: Sequelize.DataTypes.UUID,
+            defaultValue: Sequelize.DataTypes.UUIDV4,
+            primaryKey: true,
+          },
+          createdById: {
+            type: Sequelize.DataTypes.UUID,
+            references: {
+              key: 'id',
+              model: 'users',
+            },
+          },
+          updatedById: {
+            type: Sequelize.DataTypes.UUID,
+            references: {
+              key: 'id',
+              model: 'users',
+            },
+          },
+          createdAt: { type: Sequelize.DataTypes.DATE },
+          updatedAt: { type: Sequelize.DataTypes.DATE },
+          deletedAt: { type: Sequelize.DataTypes.DATE },
+          importHash: {
+            type: Sequelize.DataTypes.STRING(255),
+            allowNull: true,
+            unique: true,
+          },
+        },
+        { transaction },
+      );
+
+      await queryInterface.createTable(
+        'achievements',
+        {
+          id: {
+            type: Sequelize.DataTypes.UUID,
+            defaultValue: Sequelize.DataTypes.UUIDV4,
+            primaryKey: true,
+          },
+          createdById: {
+            type: Sequelize.DataTypes.UUID,
+            references: {
+              key: 'id',
+              model: 'users',
+            },
+          },
+          updatedById: {
+            type: Sequelize.DataTypes.UUID,
+            references: {
+              key: 'id',
+              model: 'users',
+            },
+          },
+          createdAt: { type: Sequelize.DataTypes.DATE },
+          updatedAt: { type: Sequelize.DataTypes.DATE },
+          deletedAt: { type: Sequelize.DataTypes.DATE },
+          importHash: {
+            type: Sequelize.DataTypes.STRING(255),
+            allowNull: true,
+            unique: true,
+          },
+        },
+        { transaction },
+      );
+
+      await queryInterface.createTable(
+        'courses',
+        {
+          id: {
+            type: Sequelize.DataTypes.UUID,
+            defaultValue: Sequelize.DataTypes.UUIDV4,
+            primaryKey: true,
+          },
+          createdById: {
+            type: Sequelize.DataTypes.UUID,
+            references: {
+              key: 'id',
+              model: 'users',
+            },
+          },
+          updatedById: {
+            type: Sequelize.DataTypes.UUID,
+            references: {
+              key: 'id',
+              model: 'users',
+            },
+          },
+          createdAt: { type: Sequelize.DataTypes.DATE },
+          updatedAt: { type: Sequelize.DataTypes.DATE },
+          deletedAt: { type: Sequelize.DataTypes.DATE },
+          importHash: {
+            type: Sequelize.DataTypes.STRING(255),
+            allowNull: true,
+            unique: true,
+          },
+        },
+        { transaction },
+      );
+
+      await queryInterface.createTable(
+        'options',
+        {
+          id: {
+            type: Sequelize.DataTypes.UUID,
+            defaultValue: Sequelize.DataTypes.UUIDV4,
+            primaryKey: true,
+          },
+          createdById: {
+            type: Sequelize.DataTypes.UUID,
+            references: {
+              key: 'id',
+              model: 'users',
+            },
+          },
+          updatedById: {
+            type: Sequelize.DataTypes.UUID,
+            references: {
+              key: 'id',
+              model: 'users',
+            },
+          },
+          createdAt: { type: Sequelize.DataTypes.DATE },
+          updatedAt: { type: Sequelize.DataTypes.DATE },
+          deletedAt: { type: Sequelize.DataTypes.DATE },
+          importHash: {
+            type: Sequelize.DataTypes.STRING(255),
+            allowNull: true,
+            unique: true,
+          },
+        },
+        { transaction },
+      );
+
+      await queryInterface.createTable(
+        'parents',
+        {
+          id: {
+            type: Sequelize.DataTypes.UUID,
+            defaultValue: Sequelize.DataTypes.UUIDV4,
+            primaryKey: true,
+          },
+          createdById: {
+            type: Sequelize.DataTypes.UUID,
+            references: {
+              key: 'id',
+              model: 'users',
+            },
+          },
+          updatedById: {
+            type: Sequelize.DataTypes.UUID,
+            references: {
+              key: 'id',
+              model: 'users',
+            },
+          },
+          createdAt: { type: Sequelize.DataTypes.DATE },
+          updatedAt: { type: Sequelize.DataTypes.DATE },
+          deletedAt: { type: Sequelize.DataTypes.DATE },
+          importHash: {
+            type: Sequelize.DataTypes.STRING(255),
+            allowNull: true,
+            unique: true,
+          },
+        },
+        { transaction },
+      );
+
+      await queryInterface.createTable(
+        'questions',
+        {
+          id: {
+            type: Sequelize.DataTypes.UUID,
+            defaultValue: Sequelize.DataTypes.UUIDV4,
+            primaryKey: true,
+          },
+          createdById: {
+            type: Sequelize.DataTypes.UUID,
+            references: {
+              key: 'id',
+              model: 'users',
+            },
+          },
+          updatedById: {
+            type: Sequelize.DataTypes.UUID,
+            references: {
+              key: 'id',
+              model: 'users',
+            },
+          },
+          createdAt: { type: Sequelize.DataTypes.DATE },
+          updatedAt: { type: Sequelize.DataTypes.DATE },
+          deletedAt: { type: Sequelize.DataTypes.DATE },
+          importHash: {
+            type: Sequelize.DataTypes.STRING(255),
+            allowNull: true,
+            unique: true,
+          },
+        },
+        { transaction },
+      );
+
+      await queryInterface.createTable(
+        'quizzes',
+        {
+          id: {
+            type: Sequelize.DataTypes.UUID,
+            defaultValue: Sequelize.DataTypes.UUIDV4,
+            primaryKey: true,
+          },
+          createdById: {
+            type: Sequelize.DataTypes.UUID,
+            references: {
+              key: 'id',
+              model: 'users',
+            },
+          },
+          updatedById: {
+            type: Sequelize.DataTypes.UUID,
+            references: {
+              key: 'id',
+              model: 'users',
+            },
+          },
+          createdAt: { type: Sequelize.DataTypes.DATE },
+          updatedAt: { type: Sequelize.DataTypes.DATE },
+          deletedAt: { type: Sequelize.DataTypes.DATE },
+          importHash: {
+            type: Sequelize.DataTypes.STRING(255),
+            allowNull: true,
+            unique: true,
+          },
+        },
+        { transaction },
+      );
+
+      await queryInterface.createTable(
+        'students',
+        {
+          id: {
+            type: Sequelize.DataTypes.UUID,
+            defaultValue: Sequelize.DataTypes.UUIDV4,
+            primaryKey: true,
+          },
+          createdById: {
+            type: Sequelize.DataTypes.UUID,
+            references: {
+              key: 'id',
+              model: 'users',
+            },
+          },
+          updatedById: {
+            type: Sequelize.DataTypes.UUID,
+            references: {
+              key: 'id',
+              model: 'users',
+            },
+          },
+          createdAt: { type: Sequelize.DataTypes.DATE },
+          updatedAt: { type: Sequelize.DataTypes.DATE },
+          deletedAt: { type: Sequelize.DataTypes.DATE },
+          importHash: {
+            type: Sequelize.DataTypes.STRING(255),
+            allowNull: true,
+            unique: true,
+          },
+        },
+        { transaction },
+      );
+
+      await queryInterface.createTable(
+        'tasks',
+        {
+          id: {
+            type: Sequelize.DataTypes.UUID,
+            defaultValue: Sequelize.DataTypes.UUIDV4,
+            primaryKey: true,
+          },
+          createdById: {
+            type: Sequelize.DataTypes.UUID,
+            references: {
+              key: 'id',
+              model: 'users',
+            },
+          },
+          updatedById: {
+            type: Sequelize.DataTypes.UUID,
+            references: {
+              key: 'id',
+              model: 'users',
+            },
+          },
+          createdAt: { type: Sequelize.DataTypes.DATE },
+          updatedAt: { type: Sequelize.DataTypes.DATE },
+          deletedAt: { type: Sequelize.DataTypes.DATE },
+          importHash: {
+            type: Sequelize.DataTypes.STRING(255),
+            allowNull: true,
+            unique: true,
+          },
+        },
+        { transaction },
+      );
+
+      await queryInterface.createTable(
+        'teachers',
+        {
+          id: {
+            type: Sequelize.DataTypes.UUID,
+            defaultValue: Sequelize.DataTypes.UUIDV4,
+            primaryKey: true,
+          },
+          createdById: {
+            type: Sequelize.DataTypes.UUID,
+            references: {
+              key: 'id',
+              model: 'users',
+            },
+          },
+          updatedById: {
+            type: Sequelize.DataTypes.UUID,
+            references: {
+              key: 'id',
+              model: 'users',
+            },
+          },
+          createdAt: { type: Sequelize.DataTypes.DATE },
+          updatedAt: { type: Sequelize.DataTypes.DATE },
+          deletedAt: { type: Sequelize.DataTypes.DATE },
+          importHash: {
+            type: Sequelize.DataTypes.STRING(255),
+            allowNull: true,
+            unique: true,
+          },
+        },
+        { transaction },
+      );
+
+      await queryInterface.createTable(
+        'roles',
+        {
+          id: {
+            type: Sequelize.DataTypes.UUID,
+            defaultValue: Sequelize.DataTypes.UUIDV4,
+            primaryKey: true,
+          },
+          createdById: {
+            type: Sequelize.DataTypes.UUID,
+            references: {
+              key: 'id',
+              model: 'users',
+            },
+          },
+          updatedById: {
+            type: Sequelize.DataTypes.UUID,
+            references: {
+              key: 'id',
+              model: 'users',
+            },
+          },
+          createdAt: { type: Sequelize.DataTypes.DATE },
+          updatedAt: { type: Sequelize.DataTypes.DATE },
+          deletedAt: { type: Sequelize.DataTypes.DATE },
+          importHash: {
+            type: Sequelize.DataTypes.STRING(255),
+            allowNull: true,
+            unique: true,
+          },
+        },
+        { transaction },
+      );
+
+      await queryInterface.createTable(
+        'permissions',
+        {
+          id: {
+            type: Sequelize.DataTypes.UUID,
+            defaultValue: Sequelize.DataTypes.UUIDV4,
+            primaryKey: true,
+          },
+          createdById: {
+            type: Sequelize.DataTypes.UUID,
+            references: {
+              key: 'id',
+              model: 'users',
+            },
+          },
+          updatedById: {
+            type: Sequelize.DataTypes.UUID,
+            references: {
+              key: 'id',
+              model: 'users',
+            },
+          },
+          createdAt: { type: Sequelize.DataTypes.DATE },
+          updatedAt: { type: Sequelize.DataTypes.DATE },
+          deletedAt: { type: Sequelize.DataTypes.DATE },
+          importHash: {
+            type: Sequelize.DataTypes.STRING(255),
+            allowNull: true,
+            unique: true,
+          },
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'users',
+        'firstName',
+        {
+          type: Sequelize.DataTypes.TEXT,
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'users',
+        'lastName',
+        {
+          type: Sequelize.DataTypes.TEXT,
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'users',
+        'phoneNumber',
+        {
+          type: Sequelize.DataTypes.TEXT,
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'users',
+        'email',
+        {
+          type: Sequelize.DataTypes.TEXT,
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'users',
+        'disabled',
+        {
+          type: Sequelize.DataTypes.BOOLEAN,
+
+          defaultValue: false,
+          allowNull: false,
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'users',
+        'password',
+        {
+          type: Sequelize.DataTypes.TEXT,
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'users',
+        'emailVerified',
+        {
+          type: Sequelize.DataTypes.BOOLEAN,
+
+          defaultValue: false,
+          allowNull: false,
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'users',
+        'emailVerificationToken',
+        {
+          type: Sequelize.DataTypes.TEXT,
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'users',
+        'emailVerificationTokenExpiresAt',
+        {
+          type: Sequelize.DataTypes.DATE,
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'users',
+        'passwordResetToken',
+        {
+          type: Sequelize.DataTypes.TEXT,
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'users',
+        'passwordResetTokenExpiresAt',
+        {
+          type: Sequelize.DataTypes.DATE,
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'users',
+        'provider',
+        {
+          type: Sequelize.DataTypes.TEXT,
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'achievements',
+        'name',
+        {
+          type: Sequelize.DataTypes.TEXT,
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'achievements',
+        'description',
+        {
+          type: Sequelize.DataTypes.TEXT,
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'courses',
+        'title',
+        {
+          type: Sequelize.DataTypes.TEXT,
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'courses',
+        'description',
+        {
+          type: Sequelize.DataTypes.TEXT,
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'courses',
+        'teacherId',
+        {
+          type: Sequelize.DataTypes.UUID,
+
+          references: {
+            model: 'teachers',
+            key: 'id',
+          },
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'options',
+        'text',
+        {
+          type: Sequelize.DataTypes.TEXT,
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'options',
+        'is_correct',
+        {
+          type: Sequelize.DataTypes.BOOLEAN,
+
+          defaultValue: false,
+          allowNull: false,
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'parents',
+        'name',
+        {
+          type: Sequelize.DataTypes.TEXT,
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'parents',
+        'userId',
+        {
+          type: Sequelize.DataTypes.UUID,
+
+          references: {
+            model: 'users',
+            key: 'id',
+          },
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'questions',
+        'content',
+        {
+          type: Sequelize.DataTypes.TEXT,
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'questions',
+        'type',
+        {
+          type: Sequelize.DataTypes.ENUM,
+
+          values: ['multiple_choice', 'true_false', 'short_answer'],
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'quizzes',
+        'title',
+        {
+          type: Sequelize.DataTypes.TEXT,
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'quizzes',
+        'courseId',
+        {
+          type: Sequelize.DataTypes.UUID,
+
+          references: {
+            model: 'courses',
+            key: 'id',
+          },
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'students',
+        'name',
+        {
+          type: Sequelize.DataTypes.TEXT,
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'students',
+        'userId',
+        {
+          type: Sequelize.DataTypes.UUID,
+
+          references: {
+            model: 'users',
+            key: 'id',
+          },
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'tasks',
+        'title',
+        {
+          type: Sequelize.DataTypes.TEXT,
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'tasks',
+        'due_date',
+        {
+          type: Sequelize.DataTypes.DATE,
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'tasks',
+        'studentId',
+        {
+          type: Sequelize.DataTypes.UUID,
+
+          references: {
+            model: 'students',
+            key: 'id',
+          },
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'teachers',
+        'name',
+        {
+          type: Sequelize.DataTypes.TEXT,
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'teachers',
+        'userId',
+        {
+          type: Sequelize.DataTypes.UUID,
+
+          references: {
+            model: 'users',
+            key: 'id',
+          },
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'permissions',
+        'name',
+        {
+          type: Sequelize.DataTypes.TEXT,
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'roles',
+        'name',
+        {
+          type: Sequelize.DataTypes.TEXT,
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'roles',
+        'role_customization',
+        {
+          type: Sequelize.DataTypes.TEXT,
+        },
+        { transaction },
+      );
+
+      await queryInterface.addColumn(
+        'users',
+        'app_roleId',
+        {
+          type: Sequelize.DataTypes.UUID,
+
+          references: {
+            model: 'roles',
+            key: 'id',
+          },
+        },
+        { transaction },
+      );
+
+      await transaction.commit();
+    } catch (err) {
+      await transaction.rollback();
+      throw err;
+    }
+  },
+  /**
+   * @param {QueryInterface} queryInterface
+   * @param {Sequelize} Sequelize
+   * @returns {Promise<void>}
+   */
+  async down(queryInterface, Sequelize) {
+    /**
+     * @type {Transaction}
+     */
+    const transaction = await queryInterface.sequelize.transaction();
+    try {
+      await queryInterface.removeColumn('users', 'app_roleId', { transaction });
+
+      await queryInterface.removeColumn('roles', 'role_customization', {
+        transaction,
+      });
+
+      await queryInterface.removeColumn('roles', 'name', { transaction });
+
+      await queryInterface.removeColumn('permissions', 'name', { transaction });
+
+      await queryInterface.removeColumn('teachers', 'userId', { transaction });
+
+      await queryInterface.removeColumn('teachers', 'name', { transaction });
+
+      await queryInterface.removeColumn('tasks', 'studentId', { transaction });
+
+      await queryInterface.removeColumn('tasks', 'due_date', { transaction });
+
+      await queryInterface.removeColumn('tasks', 'title', { transaction });
+
+      await queryInterface.removeColumn('students', 'userId', { transaction });
+
+      await queryInterface.removeColumn('students', 'name', { transaction });
+
+      await queryInterface.removeColumn('quizzes', 'courseId', { transaction });
+
+      await queryInterface.removeColumn('quizzes', 'title', { transaction });
+
+      await queryInterface.removeColumn('questions', 'type', { transaction });
+
+      await queryInterface.removeColumn('questions', 'content', {
+        transaction,
+      });
+
+      await queryInterface.removeColumn('parents', 'userId', { transaction });
+
+      await queryInterface.removeColumn('parents', 'name', { transaction });
+
+      await queryInterface.removeColumn('options', 'is_correct', {
+        transaction,
+      });
+
+      await queryInterface.removeColumn('options', 'text', { transaction });
+
+      await queryInterface.removeColumn('courses', 'teacherId', {
+        transaction,
+      });
+
+      await queryInterface.removeColumn('courses', 'description', {
+        transaction,
+      });
+
+      await queryInterface.removeColumn('courses', 'title', { transaction });
+
+      await queryInterface.removeColumn('achievements', 'description', {
+        transaction,
+      });
+
+      await queryInterface.removeColumn('achievements', 'name', {
+        transaction,
+      });
+
+      await queryInterface.removeColumn('users', 'provider', { transaction });
+
+      await queryInterface.removeColumn(
+        'users',
+        'passwordResetTokenExpiresAt',
+        { transaction },
+      );
+
+      await queryInterface.removeColumn('users', 'passwordResetToken', {
+        transaction,
+      });
+
+      await queryInterface.removeColumn(
+        'users',
+        'emailVerificationTokenExpiresAt',
+        { transaction },
+      );
+
+      await queryInterface.removeColumn('users', 'emailVerificationToken', {
+        transaction,
+      });
+
+      await queryInterface.removeColumn('users', 'emailVerified', {
+        transaction,
+      });
+
+      await queryInterface.removeColumn('users', 'password', { transaction });
+
+      await queryInterface.removeColumn('users', 'disabled', { transaction });
+
+      await queryInterface.removeColumn('users', 'email', { transaction });
+
+      await queryInterface.removeColumn('users', 'phoneNumber', {
+        transaction,
+      });
+
+      await queryInterface.removeColumn('users', 'lastName', { transaction });
+
+      await queryInterface.removeColumn('users', 'firstName', { transaction });
+
+      await queryInterface.dropTable('permissions', { transaction });
+
+      await queryInterface.dropTable('roles', { transaction });
+
+      await queryInterface.dropTable('teachers', { transaction });
+
+      await queryInterface.dropTable('tasks', { transaction });
+
+      await queryInterface.dropTable('students', { transaction });
+
+      await queryInterface.dropTable('quizzes', { transaction });
+
+      await queryInterface.dropTable('questions', { transaction });
+
+      await queryInterface.dropTable('parents', { transaction });
+
+      await queryInterface.dropTable('options', { transaction });
+
+      await queryInterface.dropTable('courses', { transaction });
+
+      await queryInterface.dropTable('achievements', { transaction });
+
+      await queryInterface.dropTable('users', { transaction });
+
+      await transaction.commit();
+    } catch (err) {
+      await transaction.rollback();
+      throw err;
+    }
+  },
+};

backend/src/db/models/achievements.js

@@ -0,0 +1,71 @@
+const config = require('../../config');
+const providers = config.providers;
+const crypto = require('crypto');
+const bcrypt = require('bcrypt');
+const moment = require('moment');
+
+module.exports = function (sequelize, DataTypes) {
+  const achievements = sequelize.define(
+    'achievements',
+    {
+      id: {
+        type: DataTypes.UUID,
+        defaultValue: DataTypes.UUIDV4,
+        primaryKey: true,
+      },
+
+      name: {
+        type: DataTypes.TEXT,
+      },
+
+      description: {
+        type: DataTypes.TEXT,
+      },
+
+      importHash: {
+        type: DataTypes.STRING(255),
+        allowNull: true,
+        unique: true,
+      },
+    },
+    {
+      timestamps: true,
+      paranoid: true,
+      freezeTableName: true,
+    },
+  );
+
+  achievements.associate = (db) => {
+    db.achievements.belongsToMany(db.students, {
+      as: 'students',
+      foreignKey: {
+        name: 'achievements_studentsId',
+      },
+      constraints: false,
+      through: 'achievementsStudentsStudents',
+    });
+
+    db.achievements.belongsToMany(db.students, {
+      as: 'students_filter',
+      foreignKey: {
+        name: 'achievements_studentsId',
+      },
+      constraints: false,
+      through: 'achievementsStudentsStudents',
+    });
+
+    /// loop through entities and it's fields, and if ref === current e[name] and create relation has many on parent entity
+
+    //end loop
+
+    db.achievements.belongsTo(db.users, {
+      as: 'createdBy',
+    });
+
+    db.achievements.belongsTo(db.users, {
+      as: 'updatedBy',
+    });
+  };
+
+  return achievements;
+};

backend/src/db/models/courses.js

@@ -0,0 +1,87 @@
+const config = require('../../config');
+const providers = config.providers;
+const crypto = require('crypto');
+const bcrypt = require('bcrypt');
+const moment = require('moment');
+
+module.exports = function (sequelize, DataTypes) {
+  const courses = sequelize.define(
+    'courses',
+    {
+      id: {
+        type: DataTypes.UUID,
+        defaultValue: DataTypes.UUIDV4,
+        primaryKey: true,
+      },
+
+      title: {
+        type: DataTypes.TEXT,
+      },
+
+      description: {
+        type: DataTypes.TEXT,
+      },
+
+      importHash: {
+        type: DataTypes.STRING(255),
+        allowNull: true,
+        unique: true,
+      },
+    },
+    {
+      timestamps: true,
+      paranoid: true,
+      freezeTableName: true,
+    },
+  );
+
+  courses.associate = (db) => {
+    db.courses.belongsToMany(db.students, {
+      as: 'students',
+      foreignKey: {
+        name: 'courses_studentsId',
+      },
+      constraints: false,
+      through: 'coursesStudentsStudents',
+    });
+
+    db.courses.belongsToMany(db.students, {
+      as: 'students_filter',
+      foreignKey: {
+        name: 'courses_studentsId',
+      },
+      constraints: false,
+      through: 'coursesStudentsStudents',
+    });
+
+    /// loop through entities and it's fields, and if ref === current e[name] and create relation has many on parent entity
+
+    db.courses.hasMany(db.quizzes, {
+      as: 'quizzes_course',
+      foreignKey: {
+        name: 'courseId',
+      },
+      constraints: false,
+    });
+
+    //end loop
+
+    db.courses.belongsTo(db.teachers, {
+      as: 'teacher',
+      foreignKey: {
+        name: 'teacherId',
+      },
+      constraints: false,
+    });
+
+    db.courses.belongsTo(db.users, {
+      as: 'createdBy',
+    });
+
+    db.courses.belongsTo(db.users, {
+      as: 'updatedBy',
+    });
+  };
+
+  return courses;
+};

backend/src/db/models/file.js

@@ -0,0 +1,53 @@
+module.exports = function (sequelize, DataTypes) {
+  const file = sequelize.define(
+    'file',
+    {
+      id: {
+        type: DataTypes.UUID,
+        defaultValue: DataTypes.UUIDV4,
+        primaryKey: true,
+      },
+      belongsTo: DataTypes.STRING(255),
+      belongsToId: DataTypes.UUID,
+      belongsToColumn: DataTypes.STRING(255),
+      name: {
+        type: DataTypes.STRING(2083),
+        allowNull: false,
+        validate: {
+          notEmpty: true,
+        },
+      },
+      sizeInBytes: {
+        type: DataTypes.INTEGER,
+        allowNull: true,
+      },
+      privateUrl: {
+        type: DataTypes.STRING(2083),
+        allowNull: true,
+      },
+      publicUrl: {
+        type: DataTypes.STRING(2083),
+        allowNull: false,
+        validate: {
+          notEmpty: true,
+        },
+      },
+    },
+    {
+      timestamps: true,
+      paranoid: true,
+    },
+  );
+
+  file.associate = (db) => {
+    db.file.belongsTo(db.users, {
+      as: 'createdBy',
+    });
+
+    db.file.belongsTo(db.users, {
+      as: 'updatedBy',
+    });
+  };
+
+  return file;
+};

backend/src/db/models/index.js

@@ -0,0 +1,47 @@
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+const Sequelize = require('sequelize');
+const basename = path.basename(__filename);
+const env = process.env.NODE_ENV || 'development';
+const config = require('../db.config')[env];
+const db = {};
+
+let sequelize;
+console.log(env);
+if (config.use_env_variable) {
+  sequelize = new Sequelize(process.env[config.use_env_variable], config);
+} else {
+  sequelize = new Sequelize(
+    config.database,
+    config.username,
+    config.password,
+    config,
+  );
+}
+
+fs.readdirSync(__dirname)
+  .filter((file) => {
+    return (
+      file.indexOf('.') !== 0 && file !== basename && file.slice(-3) === '.js'
+    );
+  })
+  .forEach((file) => {
+    const model = require(path.join(__dirname, file))(
+      sequelize,
+      Sequelize.DataTypes,
+    );
+    db[model.name] = model;
+  });
+
+Object.keys(db).forEach((modelName) => {
+  if (db[modelName].associate) {
+    db[modelName].associate(db);
+  }
+});
+
+db.sequelize = sequelize;
+db.Sequelize = Sequelize;
+
+module.exports = db;

backend/src/db/models/options.js

@@ -0,0 +1,56 @@
+const config = require('../../config');
+const providers = config.providers;
+const crypto = require('crypto');
+const bcrypt = require('bcrypt');
+const moment = require('moment');
+
+module.exports = function (sequelize, DataTypes) {
+  const options = sequelize.define(
+    'options',
+    {
+      id: {
+        type: DataTypes.UUID,
+        defaultValue: DataTypes.UUIDV4,
+        primaryKey: true,
+      },
+
+      text: {
+        type: DataTypes.TEXT,
+      },
+
+      is_correct: {
+        type: DataTypes.BOOLEAN,
+
+        allowNull: false,
+        defaultValue: false,
+      },
+
+      importHash: {
+        type: DataTypes.STRING(255),
+        allowNull: true,
+        unique: true,
+      },
+    },
+    {
+      timestamps: true,
+      paranoid: true,
+      freezeTableName: true,
+    },
+  );
+
+  options.associate = (db) => {
+    /// loop through entities and it's fields, and if ref === current e[name] and create relation has many on parent entity
+
+    //end loop
+
+    db.options.belongsTo(db.users, {
+      as: 'createdBy',
+    });
+
+    db.options.belongsTo(db.users, {
+      as: 'updatedBy',
+    });
+  };
+
+  return options;
+};

backend/src/db/models/parents.js

@@ -0,0 +1,75 @@
+const config = require('../../config');
+const providers = config.providers;
+const crypto = require('crypto');
+const bcrypt = require('bcrypt');
+const moment = require('moment');
+
+module.exports = function (sequelize, DataTypes) {
+  const parents = sequelize.define(
+    'parents',
+    {
+      id: {
+        type: DataTypes.UUID,
+        defaultValue: DataTypes.UUIDV4,
+        primaryKey: true,
+      },
+
+      name: {
+        type: DataTypes.TEXT,
+      },
+
+      importHash: {
+        type: DataTypes.STRING(255),
+        allowNull: true,
+        unique: true,
+      },
+    },
+    {
+      timestamps: true,
+      paranoid: true,
+      freezeTableName: true,
+    },
+  );
+
+  parents.associate = (db) => {
+    db.parents.belongsToMany(db.students, {
+      as: 'children',
+      foreignKey: {
+        name: 'parents_childrenId',
+      },
+      constraints: false,
+      through: 'parentsChildrenStudents',
+    });
+
+    db.parents.belongsToMany(db.students, {
+      as: 'children_filter',
+      foreignKey: {
+        name: 'parents_childrenId',
+      },
+      constraints: false,
+      through: 'parentsChildrenStudents',
+    });
+
+    /// loop through entities and it's fields, and if ref === current e[name] and create relation has many on parent entity
+
+    //end loop
+
+    db.parents.belongsTo(db.users, {
+      as: 'user',
+      foreignKey: {
+        name: 'userId',
+      },
+      constraints: false,
+    });
+
+    db.parents.belongsTo(db.users, {
+      as: 'createdBy',
+    });
+
+    db.parents.belongsTo(db.users, {
+      as: 'updatedBy',
+    });
+  };
+
+  return parents;
+};

backend/src/db/models/permissions.js

@@ -0,0 +1,49 @@
+const config = require('../../config');
+const providers = config.providers;
+const crypto = require('crypto');
+const bcrypt = require('bcrypt');
+const moment = require('moment');
+
+module.exports = function (sequelize, DataTypes) {
+  const permissions = sequelize.define(
+    'permissions',
+    {
+      id: {
+        type: DataTypes.UUID,
+        defaultValue: DataTypes.UUIDV4,
+        primaryKey: true,
+      },
+
+      name: {
+        type: DataTypes.TEXT,
+      },
+
+      importHash: {
+        type: DataTypes.STRING(255),
+        allowNull: true,
+        unique: true,
+      },
+    },
+    {
+      timestamps: true,
+      paranoid: true,
+      freezeTableName: true,
+    },
+  );
+
+  permissions.associate = (db) => {
+    /// loop through entities and it's fields, and if ref === current e[name] and create relation has many on parent entity
+
+    //end loop
+
+    db.permissions.belongsTo(db.users, {
+      as: 'createdBy',
+    });
+
+    db.permissions.belongsTo(db.users, {
+      as: 'updatedBy',
+    });
+  };
+
+  return permissions;
+};

backend/src/db/models/questions.js

@@ -0,0 +1,73 @@
+const config = require('../../config');
+const providers = config.providers;
+const crypto = require('crypto');
+const bcrypt = require('bcrypt');
+const moment = require('moment');
+
+module.exports = function (sequelize, DataTypes) {
+  const questions = sequelize.define(
+    'questions',
+    {
+      id: {
+        type: DataTypes.UUID,
+        defaultValue: DataTypes.UUIDV4,
+        primaryKey: true,
+      },
+
+      content: {
+        type: DataTypes.TEXT,
+      },
+
+      type: {
+        type: DataTypes.ENUM,
+
+        values: ['multiple_choice', 'true_false', 'short_answer'],
+      },
+
+      importHash: {
+        type: DataTypes.STRING(255),
+        allowNull: true,
+        unique: true,
+      },
+    },
+    {
+      timestamps: true,
+      paranoid: true,
+      freezeTableName: true,
+    },
+  );
+
+  questions.associate = (db) => {
+    db.questions.belongsToMany(db.options, {
+      as: 'options',
+      foreignKey: {
+        name: 'questions_optionsId',
+      },
+      constraints: false,
+      through: 'questionsOptionsOptions',
+    });
+
+    db.questions.belongsToMany(db.options, {
+      as: 'options_filter',
+      foreignKey: {
+        name: 'questions_optionsId',
+      },
+      constraints: false,
+      through: 'questionsOptionsOptions',
+    });
+
+    /// loop through entities and it's fields, and if ref === current e[name] and create relation has many on parent entity
+
+    //end loop
+
+    db.questions.belongsTo(db.users, {
+      as: 'createdBy',
+    });
+
+    db.questions.belongsTo(db.users, {
+      as: 'updatedBy',
+    });
+  };
+
+  return questions;
+};

backend/src/db/models/quizzes.js

@@ -0,0 +1,75 @@
+const config = require('../../config');
+const providers = config.providers;
+const crypto = require('crypto');
+const bcrypt = require('bcrypt');
+const moment = require('moment');
+
+module.exports = function (sequelize, DataTypes) {
+  const quizzes = sequelize.define(
+    'quizzes',
+    {
+      id: {
+        type: DataTypes.UUID,
+        defaultValue: DataTypes.UUIDV4,
+        primaryKey: true,
+      },
+
+      title: {
+        type: DataTypes.TEXT,
+      },
+
+      importHash: {
+        type: DataTypes.STRING(255),
+        allowNull: true,
+        unique: true,
+      },
+    },
+    {
+      timestamps: true,
+      paranoid: true,
+      freezeTableName: true,
+    },
+  );
+
+  quizzes.associate = (db) => {
+    db.quizzes.belongsToMany(db.questions, {
+      as: 'questions',
+      foreignKey: {
+        name: 'quizzes_questionsId',
+      },
+      constraints: false,
+      through: 'quizzesQuestionsQuestions',
+    });
+
+    db.quizzes.belongsToMany(db.questions, {
+      as: 'questions_filter',
+      foreignKey: {
+        name: 'quizzes_questionsId',
+      },
+      constraints: false,
+      through: 'quizzesQuestionsQuestions',
+    });
+
+    /// loop through entities and it's fields, and if ref === current e[name] and create relation has many on parent entity
+
+    //end loop
+
+    db.quizzes.belongsTo(db.courses, {
+      as: 'course',
+      foreignKey: {
+        name: 'courseId',
+      },
+      constraints: false,
+    });
+
+    db.quizzes.belongsTo(db.users, {
+      as: 'createdBy',
+    });
+
+    db.quizzes.belongsTo(db.users, {
+      as: 'updatedBy',
+    });
+  };
+
+  return quizzes;
+};

backend/src/db/models/roles.js

@@ -0,0 +1,79 @@
+const config = require('../../config');
+const providers = config.providers;
+const crypto = require('crypto');
+const bcrypt = require('bcrypt');
+const moment = require('moment');
+
+module.exports = function (sequelize, DataTypes) {
+  const roles = sequelize.define(
+    'roles',
+    {
+      id: {
+        type: DataTypes.UUID,
+        defaultValue: DataTypes.UUIDV4,
+        primaryKey: true,
+      },
+
+      name: {
+        type: DataTypes.TEXT,
+      },
+
+      role_customization: {
+        type: DataTypes.TEXT,
+      },
+
+      importHash: {
+        type: DataTypes.STRING(255),
+        allowNull: true,
+        unique: true,
+      },
+    },
+    {
+      timestamps: true,
+      paranoid: true,
+      freezeTableName: true,
+    },
+  );
+
+  roles.associate = (db) => {
+    db.roles.belongsToMany(db.permissions, {
+      as: 'permissions',
+      foreignKey: {
+        name: 'roles_permissionsId',
+      },
+      constraints: false,
+      through: 'rolesPermissionsPermissions',
+    });
+
+    db.roles.belongsToMany(db.permissions, {
+      as: 'permissions_filter',
+      foreignKey: {
+        name: 'roles_permissionsId',
+      },
+      constraints: false,
+      through: 'rolesPermissionsPermissions',
+    });
+
+    /// loop through entities and it's fields, and if ref === current e[name] and create relation has many on parent entity
+
+    db.roles.hasMany(db.users, {
+      as: 'users_app_role',
+      foreignKey: {
+        name: 'app_roleId',
+      },
+      constraints: false,
+    });
+
+    //end loop
+
+    db.roles.belongsTo(db.users, {
+      as: 'createdBy',
+    });
+
+    db.roles.belongsTo(db.users, {
+      as: 'updatedBy',
+    });
+  };
+
+  return roles;
+};

backend/src/db/models/students.js

@@ -0,0 +1,137 @@
+const config = require('../../config');
+const providers = config.providers;
+const crypto = require('crypto');
+const bcrypt = require('bcrypt');
+const moment = require('moment');
+
+module.exports = function (sequelize, DataTypes) {
+  const students = sequelize.define(
+    'students',
+    {
+      id: {
+        type: DataTypes.UUID,
+        defaultValue: DataTypes.UUIDV4,
+        primaryKey: true,
+      },
+
+      name: {
+        type: DataTypes.TEXT,
+      },
+
+      importHash: {
+        type: DataTypes.STRING(255),
+        allowNull: true,
+        unique: true,
+      },
+    },
+    {
+      timestamps: true,
+      paranoid: true,
+      freezeTableName: true,
+    },
+  );
+
+  students.associate = (db) => {
+    db.students.belongsToMany(db.courses, {
+      as: 'courses',
+      foreignKey: {
+        name: 'students_coursesId',
+      },
+      constraints: false,
+      through: 'studentsCoursesCourses',
+    });
+
+    db.students.belongsToMany(db.courses, {
+      as: 'courses_filter',
+      foreignKey: {
+        name: 'students_coursesId',
+      },
+      constraints: false,
+      through: 'studentsCoursesCourses',
+    });
+
+    db.students.belongsToMany(db.quizzes, {
+      as: 'quizzes',
+      foreignKey: {
+        name: 'students_quizzesId',
+      },
+      constraints: false,
+      through: 'studentsQuizzesQuizzes',
+    });
+
+    db.students.belongsToMany(db.quizzes, {
+      as: 'quizzes_filter',
+      foreignKey: {
+        name: 'students_quizzesId',
+      },
+      constraints: false,
+      through: 'studentsQuizzesQuizzes',
+    });
+
+    db.students.belongsToMany(db.tasks, {
+      as: 'tasks',
+      foreignKey: {
+        name: 'students_tasksId',
+      },
+      constraints: false,
+      through: 'studentsTasksTasks',
+    });
+
+    db.students.belongsToMany(db.tasks, {
+      as: 'tasks_filter',
+      foreignKey: {
+        name: 'students_tasksId',
+      },
+      constraints: false,
+      through: 'studentsTasksTasks',
+    });
+
+    db.students.belongsToMany(db.achievements, {
+      as: 'achievements',
+      foreignKey: {
+        name: 'students_achievementsId',
+      },
+      constraints: false,
+      through: 'studentsAchievementsAchievements',
+    });
+
+    db.students.belongsToMany(db.achievements, {
+      as: 'achievements_filter',
+      foreignKey: {
+        name: 'students_achievementsId',
+      },
+      constraints: false,
+      through: 'studentsAchievementsAchievements',
+    });
+
+    /// loop through entities and it's fields, and if ref === current e[name] and create relation has many on parent entity
+
+    db.students.hasMany(db.tasks, {
+      as: 'tasks_student',
+      foreignKey: {
+        name: 'studentId',
+      },
+      constraints: false,
+    });
+
+    //end loop
+
+    db.students.belongsTo(db.users, {
+      as: 'user',
+      foreignKey: {
+        name: 'userId',
+      },
+      constraints: false,
+    });
+
+    db.students.belongsTo(db.users, {
+      as: 'createdBy',
+    });
+
+    db.students.belongsTo(db.users, {
+      as: 'updatedBy',
+    });
+  };
+
+  return students;
+};

backend/src/db/models/tasks.js

@@ -0,0 +1,61 @@
+const config = require('../../config');
+const providers = config.providers;
+const crypto = require('crypto');
+const bcrypt = require('bcrypt');
+const moment = require('moment');
+
+module.exports = function (sequelize, DataTypes) {
+  const tasks = sequelize.define(
+    'tasks',
+    {
+      id: {
+        type: DataTypes.UUID,
+        defaultValue: DataTypes.UUIDV4,
+        primaryKey: true,
+      },
+
+      title: {
+        type: DataTypes.TEXT,
+      },
+
+      due_date: {
+        type: DataTypes.DATE,
+      },
+
+      importHash: {
+        type: DataTypes.STRING(255),
+        allowNull: true,
+        unique: true,
+      },
+    },
+    {
+      timestamps: true,
+      paranoid: true,
+      freezeTableName: true,
+    },
+  );
+
+  tasks.associate = (db) => {
+    /// loop through entities and it's fields, and if ref === current e[name] and create relation has many on parent entity
+
+    //end loop
+
+    db.tasks.belongsTo(db.students, {
+      as: 'student',
+      foreignKey: {
+        name: 'studentId',
+      },
+      constraints: false,
+    });
+
+    db.tasks.belongsTo(db.users, {
+      as: 'createdBy',
+    });
+
+    db.tasks.belongsTo(db.users, {
+      as: 'updatedBy',
+    });
+  };
+
+  return tasks;
+};

backend/src/db/models/teachers.js

@@ -0,0 +1,101 @@
+const config = require('../../config');
+const providers = config.providers;
+const crypto = require('crypto');
+const bcrypt = require('bcrypt');
+const moment = require('moment');
+
+module.exports = function (sequelize, DataTypes) {
+  const teachers = sequelize.define(
+    'teachers',
+    {
+      id: {
+        type: DataTypes.UUID,
+        defaultValue: DataTypes.UUIDV4,
+        primaryKey: true,
+      },
+
+      name: {
+        type: DataTypes.TEXT,
+      },
+
+      importHash: {
+        type: DataTypes.STRING(255),
+        allowNull: true,
+        unique: true,
+      },
+    },
+    {
+      timestamps: true,
+      paranoid: true,
+      freezeTableName: true,
+    },
+  );
+
+  teachers.associate = (db) => {
+    db.teachers.belongsToMany(db.courses, {
+      as: 'courses',
+      foreignKey: {
+        name: 'teachers_coursesId',
+      },
+      constraints: false,
+      through: 'teachersCoursesCourses',
+    });
+
+    db.teachers.belongsToMany(db.courses, {
+      as: 'courses_filter',
+      foreignKey: {
+        name: 'teachers_coursesId',
+      },
+      constraints: false,
+      through: 'teachersCoursesCourses',
+    });
+
+    db.teachers.belongsToMany(db.quizzes, {
+      as: 'quizzes',
+      foreignKey: {
+        name: 'teachers_quizzesId',
+      },
+      constraints: false,
+      through: 'teachersQuizzesQuizzes',
+    });
+
+    db.teachers.belongsToMany(db.quizzes, {
+      as: 'quizzes_filter',
+      foreignKey: {
+        name: 'teachers_quizzesId',
+      },
+      constraints: false,
+      through: 'teachersQuizzesQuizzes',
+    });
+
+    /// loop through entities and it's fields, and if ref === current e[name] and create relation has many on parent entity
+
+    db.teachers.hasMany(db.courses, {
+      as: 'courses_teacher',
+      foreignKey: {
+        name: 'teacherId',
+      },
+      constraints: false,
+    });
+
+    //end loop
+
+    db.teachers.belongsTo(db.users, {
+      as: 'user',
+      foreignKey: {
+        name: 'userId',
+      },
+      constraints: false,
+    });
+
+    db.teachers.belongsTo(db.users, {
+      as: 'createdBy',
+    });
+
+    db.teachers.belongsTo(db.users, {
+      as: 'updatedBy',
+    });
+  };
+
+  return teachers;
+};

backend/src/db/models/users.js

@@ -0,0 +1,195 @@
+const config = require('../../config');
+const providers = config.providers;
+const crypto = require('crypto');
+const bcrypt = require('bcrypt');
+const moment = require('moment');
+
+module.exports = function (sequelize, DataTypes) {
+  const users = sequelize.define(
+    'users',
+    {
+      id: {
+        type: DataTypes.UUID,
+        defaultValue: DataTypes.UUIDV4,
+        primaryKey: true,
+      },
+
+      firstName: {
+        type: DataTypes.TEXT,
+      },
+
+      lastName: {
+        type: DataTypes.TEXT,
+      },
+
+      phoneNumber: {
+        type: DataTypes.TEXT,
+      },
+
+      email: {
+        type: DataTypes.TEXT,
+      },
+
+      disabled: {
+        type: DataTypes.BOOLEAN,
+
+        allowNull: false,
+        defaultValue: false,
+      },
+
+      password: {
+        type: DataTypes.TEXT,
+      },
+
+      emailVerified: {
+        type: DataTypes.BOOLEAN,
+
+        allowNull: false,
+        defaultValue: false,
+      },
+
+      emailVerificationToken: {
+        type: DataTypes.TEXT,
+      },
+
+      emailVerificationTokenExpiresAt: {
+        type: DataTypes.DATE,
+      },
+
+      passwordResetToken: {
+        type: DataTypes.TEXT,
+      },
+
+      passwordResetTokenExpiresAt: {
+        type: DataTypes.DATE,
+      },
+
+      provider: {
+        type: DataTypes.TEXT,
+      },
+
+      importHash: {
+        type: DataTypes.STRING(255),
+        allowNull: true,
+        unique: true,
+      },
+    },
+    {
+      timestamps: true,
+      paranoid: true,
+      freezeTableName: true,
+    },
+  );
+
+  users.associate = (db) => {
+    db.users.belongsToMany(db.permissions, {
+      as: 'custom_permissions',
+      foreignKey: {
+        name: 'users_custom_permissionsId',
+      },
+      constraints: false,
+      through: 'usersCustom_permissionsPermissions',
+    });
+
+    db.users.belongsToMany(db.permissions, {
+      as: 'custom_permissions_filter',
+      foreignKey: {
+        name: 'users_custom_permissionsId',
+      },
+      constraints: false,
+      through: 'usersCustom_permissionsPermissions',
+    });
+
+    /// loop through entities and it's fields, and if ref === current e[name] and create relation has many on parent entity
+
+    db.users.hasMany(db.parents, {
+      as: 'parents_user',
+      foreignKey: {
+        name: 'userId',
+      },
+      constraints: false,
+    });
+
+    db.users.hasMany(db.students, {
+      as: 'students_user',
+      foreignKey: {
+        name: 'userId',
+      },
+      constraints: false,
+    });
+
+    db.users.hasMany(db.teachers, {
+      as: 'teachers_user',
+      foreignKey: {
+        name: 'userId',
+      },
+      constraints: false,
+    });
+
+    //end loop
+
+    db.users.belongsTo(db.roles, {
+      as: 'app_role',
+      foreignKey: {
+        name: 'app_roleId',
+      },
+      constraints: false,
+    });
+
+    db.users.hasMany(db.file, {
+      as: 'avatar',
+      foreignKey: 'belongsToId',
+      constraints: false,
+      scope: {
+        belongsTo: db.users.getTableName(),
+        belongsToColumn: 'avatar',
+      },
+    });
+
+    db.users.belongsTo(db.users, {
+      as: 'createdBy',
+    });
+
+    db.users.belongsTo(db.users, {
+      as: 'updatedBy',
+    });
+  };
+
+  users.beforeCreate((users, options) => {
+    users = trimStringFields(users);
+
+    if (
+      users.provider !== providers.LOCAL &&
+      Object.values(providers).indexOf(users.provider) > -1
+    ) {
+      users.emailVerified = true;
+
+      if (!users.password) {
+        const password = crypto.randomBytes(20).toString('hex');
+
+        const hashedPassword = bcrypt.hashSync(
+          password,
+          config.bcrypt.saltRounds,
+        );
+
+        users.password = hashedPassword;
+      }
+    }
+  });
+
+  users.beforeUpdate((users, options) => {
+    users = trimStringFields(users);
+  });
+
+  return users;
+};
+
+function trimStringFields(users) {
+  users.email = users.email.trim();
+
+  users.firstName = users.firstName ? users.firstName.trim() : null;
+
+  users.lastName = users.lastName ? users.lastName.trim() : null;
+
+  return users;
+}

backend/src/db/reset.js

@@ -0,0 +1,16 @@
+const db = require('./models');
+const { execSync } = require('child_process');
+
+console.log('Resetting Database');
+
+db.sequelize
+  .sync({ force: true })
+  .then(() => {
+    execSync('sequelize db:seed:all');
+    console.log('OK');
+    process.exit();
+  })
+  .catch((error) => {
+    console.error(error);
+    process.exit(1);
+  });

backend/src/db/seeders/20200430130759-admin-user.js

@@ -0,0 +1,69 @@
+'use strict';
+const bcrypt = require('bcrypt');
+const config = require('../../config');
+
+const ids = [
+  '193bf4b5-9f07-4bd5-9a43-e7e41f3e96af',
+  'af5a87be-8f9c-4630-902a-37a60b7005ba',
+  '5bc531ab-611f-41f3-9373-b7cc5d09c93d',
+];
+
+module.exports = {
+  up: async (queryInterface, Sequelize) => {
+    let hash = bcrypt.hashSync(config.admin_pass, config.bcrypt.saltRounds);
+
+    try {
+      await queryInterface.bulkInsert('users', [
+        {
+          id: ids[0],
+          firstName: 'Admin',
+          email: config.admin_email,
+          emailVerified: true,
+          provider: config.providers.LOCAL,
+          password: hash,
+          createdAt: new Date(),
+          updatedAt: new Date(),
+        },
+        {
+          id: ids[1],
+          firstName: 'John',
+          email: 'john@doe.com',
+          emailVerified: true,
+          provider: config.providers.LOCAL,
+          password: hash,
+          createdAt: new Date(),
+          updatedAt: new Date(),
+        },
+        {
+          id: ids[2],
+          firstName: 'Client',
+          email: 'client@hello.com',
+          emailVerified: true,
+          provider: config.providers.LOCAL,
+          password: hash,
+          createdAt: new Date(),
+          updatedAt: new Date(),
+        },
+      ]);
+    } catch (error) {
+      console.error('Error during bulkInsert:', error);
+      throw error;
+    }
+  },
+  down: async (queryInterface, Sequelize) => {
+    try {
+      await queryInterface.bulkDelete(
+        'users',
+        {
+          id: {
+            [Sequelize.Op.in]: ids,
+          },
+        },
+        {},
+      );
+    } catch (error) {
+      console.error('Error during bulkDelete:', error);
+      throw error;
+    }
+  },
+};

backend/src/db/seeders/20231127130745-sample-data.js

@@ -0,0 +1,884 @@
+const db = require('../models');
+const Users = db.users;
+
+const Achievements = db.achievements;
+
+const Courses = db.courses;
+
+const Options = db.options;
+
+const Parents = db.parents;
+
+const Questions = db.questions;
+
+const Quizzes = db.quizzes;
+
+const Students = db.students;
+
+const Tasks = db.tasks;
+
+const Teachers = db.teachers;
+
+const AchievementsData = [
+  {
+    name: 'Math Whiz',
+
+    description: 'Excelled in mathematics quizzes',
+
+    // type code here for "relation_many" field
+  },
+
+  {
+    name: 'Science Star',
+
+    description: 'Outstanding performance in science subjects',
+
+    // type code here for "relation_many" field
+  },
+
+  {
+    name: 'History Buff',
+
+    description: 'Exceptional knowledge in history',
+
+    // type code here for "relation_many" field
+  },
+
+  {
+    name: 'Quiz Master',
+
+    description: 'Top scores in all quizzes',
+
+    // type code here for "relation_many" field
+  },
+
+  {
+    name: 'Task Completer',
+
+    description: 'Completed all tasks on time',
+
+    // type code here for "relation_many" field
+  },
+];
+
+const CoursesData = [
+  {
+    title: 'Mathematics 101',
+
+    description: 'Basic concepts of mathematics',
+
+    // type code here for "relation_one" field
+
+    // type code here for "relation_many" field
+  },
+
+  {
+    title: 'Physics 101',
+
+    description: 'Introduction to physics',
+
+    // type code here for "relation_one" field
+
+    // type code here for "relation_many" field
+  },
+
+  {
+    title: 'Chemistry 101',
+
+    description: 'Fundamentals of chemistry',
+
+    // type code here for "relation_one" field
+
+    // type code here for "relation_many" field
+  },
+
+  {
+    title: 'Biology 101',
+
+    description: 'Basics of biology',
+
+    // type code here for "relation_one" field
+
+    // type code here for "relation_many" field
+  },
+
+  {
+    title: 'History 101',
+
+    description: 'World history overview',
+
+    // type code here for "relation_one" field
+
+    // type code here for "relation_many" field
+  },
+];
+
+const OptionsData = [
+  {
+    text: '4',
+
+    is_correct: true,
+  },
+
+  {
+    text: '3',
+
+    is_correct: false,
+  },
+
+  {
+    text: '5',
+
+    is_correct: false,
+  },
+
+  {
+    text: 'True',
+
+    is_correct: true,
+  },
+
+  {
+    text: 'False',
+
+    is_correct: true,
+  },
+];
+
+const ParentsData = [
+  {
+    name: 'Karen Johnson',
+
+    // type code here for "relation_one" field
+
+    // type code here for "relation_many" field
+  },
+
+  {
+    name: 'Larry Smith',
+
+    // type code here for "relation_one" field
+
+    // type code here for "relation_many" field
+  },
+
+  {
+    name: 'Mona Brown',
+
+    // type code here for "relation_one" field
+
+    // type code here for "relation_many" field
+  },
+
+  {
+    name: 'Nathan Prince',
+
+    // type code here for "relation_one" field
+
+    // type code here for "relation_many" field
+  },
+
+  {
+    name: 'Olivia Hunt',
+
+    // type code here for "relation_one" field
+
+    // type code here for "relation_many" field
+  },
+];
+
+const QuestionsData = [
+  {
+    content: 'What is 2+2?',
+
+    type: 'true_false',
+
+    // type code here for "relation_many" field
+  },
+
+  {
+    content: 'What is the capital of France?',
+
+    type: 'true_false',
+
+    // type code here for "relation_many" field
+  },
+
+  {
+    content: 'Is the Earth flat?',
+
+    type: 'short_answer',
+
+    // type code here for "relation_many" field
+  },
+
+  {
+    content: 'What is the chemical symbol for water?',
+
+    type: 'short_answer',
+
+    // type code here for "relation_many" field
+  },
+
+  {
+    content: 'Who discovered gravity?',
+
+    type: 'short_answer',
+
+    // type code here for "relation_many" field
+  },
+];
+
+const QuizzesData = [
+  {
+    title: 'Math Quiz 1',
+
+    // type code here for "relation_one" field
+
+    // type code here for "relation_many" field
+  },
+
+  {
+    title: 'Physics Quiz 1',
+
+    // type code here for "relation_one" field
+
+    // type code here for "relation_many" field
+  },
+
+  {
+    title: 'Chemistry Quiz 1',
+
+    // type code here for "relation_one" field
+
+    // type code here for "relation_many" field
+  },
+
+  {
+    title: 'Biology Quiz 1',
+
+    // type code here for "relation_one" field
+
+    // type code here for "relation_many" field
+  },
+
+  {
+    title: 'History Quiz 1',
+
+    // type code here for "relation_one" field
+
+    // type code here for "relation_many" field
+  },
+];
+
+const StudentsData = [
+  {
+    name: 'Alice Johnson',
+
+    // type code here for "relation_one" field
+
+    // type code here for "relation_many" field
+
+    // type code here for "relation_many" field
+
+    // type code here for "relation_many" field
+
+    // type code here for "relation_many" field
+  },
+
+  {
+    name: 'Bob Smith',
+
+    // type code here for "relation_one" field
+
+    // type code here for "relation_many" field
+
+    // type code here for "relation_many" field
+
+    // type code here for "relation_many" field
+
+    // type code here for "relation_many" field
+  },
+
+  {
+    name: 'Charlie Brown',
+
+    // type code here for "relation_one" field
+
+    // type code here for "relation_many" field
+
+    // type code here for "relation_many" field
+
+    // type code here for "relation_many" field
+
+    // type code here for "relation_many" field
+  },
+
+  {
+    name: 'Diana Prince',
+
+    // type code here for "relation_one" field
+
+    // type code here for "relation_many" field
+
+    // type code here for "relation_many" field
+
+    // type code here for "relation_many" field
+
+    // type code here for "relation_many" field
+  },
+
+  {
+    name: 'Ethan Hunt',
+
+    // type code here for "relation_one" field
+
+    // type code here for "relation_many" field
+
+    // type code here for "relation_many" field
+
+    // type code here for "relation_many" field
+
+    // type code here for "relation_many" field
+  },
+];
+
+const TasksData = [
+  {
+    title: 'Math Homework',
+
+    due_date: new Date('2023-11-01T10:00:00Z'),
+
+    // type code here for "relation_one" field
+  },
+
+  {
+    title: 'Physics Assignment',
+
+    due_date: new Date('2023-11-02T10:00:00Z'),
+
+    // type code here for "relation_one" field
+  },
+
+  {
+    title: 'Chemistry Lab Report',
+
+    due_date: new Date('2023-11-03T10:00:00Z'),
+
+    // type code here for "relation_one" field
+  },
+
+  {
+    title: 'Biology Project',
+
+    due_date: new Date('2023-11-04T10:00:00Z'),
+
+    // type code here for "relation_one" field
+  },
+
+  {
+    title: 'History Essay',
+
+    due_date: new Date('2023-11-05T10:00:00Z'),
+
+    // type code here for "relation_one" field
+  },
+];
+
+const TeachersData = [
+  {
+    name: 'Fiona Gallagher',
+
+    // type code here for "relation_one" field
+
+    // type code here for "relation_many" field
+
+    // type code here for "relation_many" field
+  },
+
+  {
+    name: 'George Martin',
+
+    // type code here for "relation_one" field
+
+    // type code here for "relation_many" field
+
+    // type code here for "relation_many" field
+  },
+
+  {
+    name: 'Hannah Lee',
+
+    // type code here for "relation_one" field
+
+    // type code here for "relation_many" field
+
+    // type code here for "relation_many" field
+  },
+
+  {
+    name: 'Ian Wright',
+
+    // type code here for "relation_one" field
+
+    // type code here for "relation_many" field
+
+    // type code here for "relation_many" field
+  },
+
+  {
+    name: 'Julia Roberts',
+
+    // type code here for "relation_one" field
+
+    // type code here for "relation_many" field
+
+    // type code here for "relation_many" field
+  },
+];
+
+// Similar logic for "relation_many"
+
+// Similar logic for "relation_many"
+
+async function associateCourseWithTeacher() {
+  const relatedTeacher0 = await Teachers.findOne({
+    offset: Math.floor(Math.random() * (await Teachers.count())),
+  });
+  const Course0 = await Courses.findOne({
+    order: [['id', 'ASC']],
+    offset: 0,
+  });
+  if (Course0?.setTeacher) {
+    await Course0.setTeacher(relatedTeacher0);
+  }
+
+  const relatedTeacher1 = await Teachers.findOne({
+    offset: Math.floor(Math.random() * (await Teachers.count())),
+  });
+  const Course1 = await Courses.findOne({
+    order: [['id', 'ASC']],
+    offset: 1,
+  });
+  if (Course1?.setTeacher) {
+    await Course1.setTeacher(relatedTeacher1);
+  }
+
+  const relatedTeacher2 = await Teachers.findOne({
+    offset: Math.floor(Math.random() * (await Teachers.count())),
+  });
+  const Course2 = await Courses.findOne({
+    order: [['id', 'ASC']],
+    offset: 2,
+  });
+  if (Course2?.setTeacher) {
+    await Course2.setTeacher(relatedTeacher2);
+  }
+
+  const relatedTeacher3 = await Teachers.findOne({
+    offset: Math.floor(Math.random() * (await Teachers.count())),
+  });
+  const Course3 = await Courses.findOne({
+    order: [['id', 'ASC']],
+    offset: 3,
+  });
+  if (Course3?.setTeacher) {
+    await Course3.setTeacher(relatedTeacher3);
+  }
+
+  const relatedTeacher4 = await Teachers.findOne({
+    offset: Math.floor(Math.random() * (await Teachers.count())),
+  });
+  const Course4 = await Courses.findOne({
+    order: [['id', 'ASC']],
+    offset: 4,
+  });
+  if (Course4?.setTeacher) {
+    await Course4.setTeacher(relatedTeacher4);
+  }
+}
+
+// Similar logic for "relation_many"
+
+async function associateParentWithUser() {
+  const relatedUser0 = await Users.findOne({
+    offset: Math.floor(Math.random() * (await Users.count())),
+  });
+  const Parent0 = await Parents.findOne({
+    order: [['id', 'ASC']],
+    offset: 0,
+  });
+  if (Parent0?.setUser) {
+    await Parent0.setUser(relatedUser0);
+  }
+
+  const relatedUser1 = await Users.findOne({
+    offset: Math.floor(Math.random() * (await Users.count())),
+  });
+  const Parent1 = await Parents.findOne({
+    order: [['id', 'ASC']],
+    offset: 1,
+  });
+  if (Parent1?.setUser) {
+    await Parent1.setUser(relatedUser1);
+  }
+
+  const relatedUser2 = await Users.findOne({
+    offset: Math.floor(Math.random() * (await Users.count())),
+  });
+  const Parent2 = await Parents.findOne({
+    order: [['id', 'ASC']],
+    offset: 2,
+  });
+  if (Parent2?.setUser) {
+    await Parent2.setUser(relatedUser2);
+  }
+
+  const relatedUser3 = await Users.findOne({
+    offset: Math.floor(Math.random() * (await Users.count())),
+  });
+  const Parent3 = await Parents.findOne({
+    order: [['id', 'ASC']],
+    offset: 3,
+  });
+  if (Parent3?.setUser) {
+    await Parent3.setUser(relatedUser3);
+  }
+
+  const relatedUser4 = await Users.findOne({
+    offset: Math.floor(Math.random() * (await Users.count())),
+  });
+  const Parent4 = await Parents.findOne({
+    order: [['id', 'ASC']],
+    offset: 4,
+  });
+  if (Parent4?.setUser) {
+    await Parent4.setUser(relatedUser4);
+  }
+}
+
+// Similar logic for "relation_many"
+
+// Similar logic for "relation_many"
+
+async function associateQuizWithCourse() {
+  const relatedCourse0 = await Courses.findOne({
+    offset: Math.floor(Math.random() * (await Courses.count())),
+  });
+  const Quiz0 = await Quizzes.findOne({
+    order: [['id', 'ASC']],
+    offset: 0,
+  });
+  if (Quiz0?.setCourse) {
+    await Quiz0.setCourse(relatedCourse0);
+  }
+
+  const relatedCourse1 = await Courses.findOne({
+    offset: Math.floor(Math.random() * (await Courses.count())),
+  });
+  const Quiz1 = await Quizzes.findOne({
+    order: [['id', 'ASC']],
+    offset: 1,
+  });
+  if (Quiz1?.setCourse) {
+    await Quiz1.setCourse(relatedCourse1);
+  }
+
+  const relatedCourse2 = await Courses.findOne({
+    offset: Math.floor(Math.random() * (await Courses.count())),
+  });
+  const Quiz2 = await Quizzes.findOne({
+    order: [['id', 'ASC']],
+    offset: 2,
+  });
+  if (Quiz2?.setCourse) {
+    await Quiz2.setCourse(relatedCourse2);
+  }
+
+  const relatedCourse3 = await Courses.findOne({
+    offset: Math.floor(Math.random() * (await Courses.count())),
+  });
+  const Quiz3 = await Quizzes.findOne({
+    order: [['id', 'ASC']],
+    offset: 3,
+  });
+  if (Quiz3?.setCourse) {
+    await Quiz3.setCourse(relatedCourse3);
+  }
+
+  const relatedCourse4 = await Courses.findOne({
+    offset: Math.floor(Math.random() * (await Courses.count())),
+  });
+  const Quiz4 = await Quizzes.findOne({
+    order: [['id', 'ASC']],
+    offset: 4,
+  });
+  if (Quiz4?.setCourse) {
+    await Quiz4.setCourse(relatedCourse4);
+  }
+}
+
+// Similar logic for "relation_many"
+
+async function associateStudentWithUser() {
+  const relatedUser0 = await Users.findOne({
+    offset: Math.floor(Math.random() * (await Users.count())),
+  });
+  const Student0 = await Students.findOne({
+    order: [['id', 'ASC']],
+    offset: 0,
+  });
+  if (Student0?.setUser) {
+    await Student0.setUser(relatedUser0);
+  }
+
+  const relatedUser1 = await Users.findOne({
+    offset: Math.floor(Math.random() * (await Users.count())),
+  });
+  const Student1 = await Students.findOne({
+    order: [['id', 'ASC']],
+    offset: 1,
+  });
+  if (Student1?.setUser) {
+    await Student1.setUser(relatedUser1);
+  }
+
+  const relatedUser2 = await Users.findOne({
+    offset: Math.floor(Math.random() * (await Users.count())),
+  });
+  const Student2 = await Students.findOne({
+    order: [['id', 'ASC']],
+    offset: 2,
+  });
+  if (Student2?.setUser) {
+    await Student2.setUser(relatedUser2);
+  }
+
+  const relatedUser3 = await Users.findOne({
+    offset: Math.floor(Math.random() * (await Users.count())),
+  });
+  const Student3 = await Students.findOne({
+    order: [['id', 'ASC']],
+    offset: 3,
+  });
+  if (Student3?.setUser) {
+    await Student3.setUser(relatedUser3);
+  }
+
+  const relatedUser4 = await Users.findOne({
+    offset: Math.floor(Math.random() * (await Users.count())),
+  });
+  const Student4 = await Students.findOne({
+    order: [['id', 'ASC']],
+    offset: 4,
+  });
+  if (Student4?.setUser) {
+    await Student4.setUser(relatedUser4);
+  }
+}
+
+// Similar logic for "relation_many"
+
+// Similar logic for "relation_many"
+
+// Similar logic for "relation_many"
+
+// Similar logic for "relation_many"
+
+async function associateTaskWithStudent() {
+  const relatedStudent0 = await Students.findOne({
+    offset: Math.floor(Math.random() * (await Students.count())),
+  });
+  const Task0 = await Tasks.findOne({
+    order: [['id', 'ASC']],
+    offset: 0,
+  });
+  if (Task0?.setStudent) {
+    await Task0.setStudent(relatedStudent0);
+  }
+
+  const relatedStudent1 = await Students.findOne({
+    offset: Math.floor(Math.random() * (await Students.count())),
+  });
+  const Task1 = await Tasks.findOne({
+    order: [['id', 'ASC']],
+    offset: 1,
+  });
+  if (Task1?.setStudent) {
+    await Task1.setStudent(relatedStudent1);
+  }
+
+  const relatedStudent2 = await Students.findOne({
+    offset: Math.floor(Math.random() * (await Students.count())),
+  });
+  const Task2 = await Tasks.findOne({
+    order: [['id', 'ASC']],
+    offset: 2,
+  });
+  if (Task2?.setStudent) {
+    await Task2.setStudent(relatedStudent2);
+  }
+
+  const relatedStudent3 = await Students.findOne({
+    offset: Math.floor(Math.random() * (await Students.count())),
+  });
+  const Task3 = await Tasks.findOne({
+    order: [['id', 'ASC']],
+    offset: 3,
+  });
+  if (Task3?.setStudent) {
+    await Task3.setStudent(relatedStudent3);
+  }
+
+  const relatedStudent4 = await Students.findOne({
+    offset: Math.floor(Math.random() * (await Students.count())),
+  });
+  const Task4 = await Tasks.findOne({
+    order: [['id', 'ASC']],
+    offset: 4,
+  });
+  if (Task4?.setStudent) {
+    await Task4.setStudent(relatedStudent4);
+  }
+}
+
+async function associateTeacherWithUser() {
+  const relatedUser0 = await Users.findOne({
+    offset: Math.floor(Math.random() * (await Users.count())),
+  });
+  const Teacher0 = await Teachers.findOne({
+    order: [['id', 'ASC']],
+    offset: 0,
+  });
+  if (Teacher0?.setUser) {
+    await Teacher0.setUser(relatedUser0);
+  }
+
+  const relatedUser1 = await Users.findOne({
+    offset: Math.floor(Math.random() * (await Users.count())),
+  });
+  const Teacher1 = await Teachers.findOne({
+    order: [['id', 'ASC']],
+    offset: 1,
+  });
+  if (Teacher1?.setUser) {
+    await Teacher1.setUser(relatedUser1);
+  }
+
+  const relatedUser2 = await Users.findOne({
+    offset: Math.floor(Math.random() * (await Users.count())),
+  });
+  const Teacher2 = await Teachers.findOne({
+    order: [['id', 'ASC']],
+    offset: 2,
+  });
+  if (Teacher2?.setUser) {
+    await Teacher2.setUser(relatedUser2);
+  }
+
+  const relatedUser3 = await Users.findOne({
+    offset: Math.floor(Math.random() * (await Users.count())),
+  });
+  const Teacher3 = await Teachers.findOne({
+    order: [['id', 'ASC']],
+    offset: 3,
+  });
+  if (Teacher3?.setUser) {
+    await Teacher3.setUser(relatedUser3);
+  }
+
+  const relatedUser4 = await Users.findOne({
+    offset: Math.floor(Math.random() * (await Users.count())),
+  });
+  const Teacher4 = await Teachers.findOne({
+    order: [['id', 'ASC']],
+    offset: 4,
+  });
+  if (Teacher4?.setUser) {
+    await Teacher4.setUser(relatedUser4);
+  }
+}
+
+// Similar logic for "relation_many"
+
+// Similar logic for "relation_many"
+
+module.exports = {
+  up: async (queryInterface, Sequelize) => {
+    await Achievements.bulkCreate(AchievementsData);
+
+    await Courses.bulkCreate(CoursesData);
+
+    await Options.bulkCreate(OptionsData);
+
+    await Parents.bulkCreate(ParentsData);
+
+    await Questions.bulkCreate(QuestionsData);
+
+    await Quizzes.bulkCreate(QuizzesData);
+
+    await Students.bulkCreate(StudentsData);
+
+    await Tasks.bulkCreate(TasksData);
+
+    await Teachers.bulkCreate(TeachersData);
+
+    await Promise.all([
+      // Similar logic for "relation_many"
+
+      // Similar logic for "relation_many"
+
+      await associateCourseWithTeacher(),
+
+      // Similar logic for "relation_many"
+
+      await associateParentWithUser(),
+
+      // Similar logic for "relation_many"
+
+      // Similar logic for "relation_many"
+
+      await associateQuizWithCourse(),
+
+      // Similar logic for "relation_many"
+
+      await associateStudentWithUser(),
+
+      // Similar logic for "relation_many"
+
+      // Similar logic for "relation_many"
+
+      // Similar logic for "relation_many"
+
+      // Similar logic for "relation_many"
+
+      await associateTaskWithStudent(),
+
+      await associateTeacherWithUser(),
+
+      // Similar logic for "relation_many"
+
+      // Similar logic for "relation_many"
+    ]);
+  },
+
+  down: async (queryInterface, Sequelize) => {
+    await queryInterface.bulkDelete('achievements', null, {});
+
+    await queryInterface.bulkDelete('courses', null, {});
+
+    await queryInterface.bulkDelete('options', null, {});
+
+    await queryInterface.bulkDelete('parents', null, {});
+
+    await queryInterface.bulkDelete('questions', null, {});
+
+    await queryInterface.bulkDelete('quizzes', null, {});
+
+    await queryInterface.bulkDelete('students', null, {});
+
+    await queryInterface.bulkDelete('tasks', null, {});
+
+    await queryInterface.bulkDelete('teachers', null, {});
+  },
+};

backend/src/db/utils.js

@@ -0,0 +1,24 @@
+const validator = require('validator');
+const { v4: uuid } = require('uuid');
+const Sequelize = require('./models').Sequelize;
+
+module.exports = class Utils {
+  static uuid(value) {
+    let id = value;
+
+    if (!validator.isUUID(id)) {
+      id = uuid();
+    }
+
+    return id;
+  }
+
+  static ilike(model, column, value) {
+    return Sequelize.where(
+      Sequelize.fn('lower', Sequelize.col(`${model}.${column}`)),
+      {
+        [Sequelize.Op.like]: `%${value}%`.toLowerCase(),
+      },
+    );
+  }
+};

backend/src/helpers.js

@@ -0,0 +1,23 @@
+const jwt = require('jsonwebtoken');
+const config = require('./config');
+
+module.exports = class Helpers {
+  static wrapAsync(fn) {
+    return function (req, res, next) {
+      fn(req, res, next).catch(next);
+    };
+  }
+
+  static commonErrorHandler(error, req, res, next) {
+    if ([400, 403, 404].includes(error.code)) {
+      return res.status(error.code).send(error.message);
+    }
+
+    console.error(error);
+    return res.status(500).send(error.message);
+  }
+
+  static jwtSign(data) {
+    return jwt.sign(data, config.secret_key, { expiresIn: '6h' });
+  }
+};

backend/src/index.js

@@ -0,0 +1,209 @@
+const express = require('express');
+const cors = require('cors');
+const app = express();
+const passport = require('passport');
+const path = require('path');
+const fs = require('fs');
+const bodyParser = require('body-parser');
+const db = require('./db/models');
+const config = require('./config');
+const swaggerUI = require('swagger-ui-express');
+const swaggerJsDoc = require('swagger-jsdoc');
+
+const authRoutes = require('./routes/auth');
+const fileRoutes = require('./routes/file');
+const searchRoutes = require('./routes/search');
+const pexelsRoutes = require('./routes/pexels');
+
+const openaiRoutes = require('./routes/openai');
+
+const contactFormRoutes = require('./routes/contactForm');
+
+const usersRoutes = require('./routes/users');
+
+const achievementsRoutes = require('./routes/achievements');
+
+const coursesRoutes = require('./routes/courses');
+
+const optionsRoutes = require('./routes/options');
+
+const parentsRoutes = require('./routes/parents');
+
+const questionsRoutes = require('./routes/questions');
+
+const quizzesRoutes = require('./routes/quizzes');
+
+const studentsRoutes = require('./routes/students');
+
+const tasksRoutes = require('./routes/tasks');
+
+const teachersRoutes = require('./routes/teachers');
+
+const rolesRoutes = require('./routes/roles');
+
+const permissionsRoutes = require('./routes/permissions');
+
+const options = {
+  definition: {
+    openapi: '3.0.0',
+    info: {
+      version: '1.0.0',
+      title: 'Student Learner',
+      description:
+        'Student Learner Online REST API for Testing and Prototyping application. You can perform all major operations with your entities - create, delete and etc.',
+    },
+    servers: [
+      {
+        url: config.swaggerUrl,
+        description: 'Development server',
+      },
+    ],
+    components: {
+      securitySchemes: {
+        bearerAuth: {
+          type: 'http',
+          scheme: 'bearer',
+          bearerFormat: 'JWT',
+        },
+      },
+      responses: {
+        UnauthorizedError: {
+          description: 'Access token is missing or invalid',
+        },
+      },
+    },
+    security: [
+      {
+        bearerAuth: [],
+      },
+    ],
+  },
+  apis: ['./src/routes/*.js'],
+};
+
+const specs = swaggerJsDoc(options);
+app.use(
+  '/api-docs',
+  function (req, res, next) {
+    swaggerUI.host = req.get('host');
+    next();
+  },
+  swaggerUI.serve,
+  swaggerUI.setup(specs),
+);
+
+app.use(cors({ origin: true }));
+require('./auth/auth');
+
+app.use(bodyParser.json());
+
+app.use('/api/auth', authRoutes);
+app.use('/api/file', fileRoutes);
+app.use('/api/pexels', pexelsRoutes);
+app.enable('trust proxy');
+
+app.use(
+  '/api/users',
+  passport.authenticate('jwt', { session: false }),
+  usersRoutes,
+);
+
+app.use(
+  '/api/achievements',
+  passport.authenticate('jwt', { session: false }),
+  achievementsRoutes,
+);
+
+app.use(
+  '/api/courses',
+  passport.authenticate('jwt', { session: false }),
+  coursesRoutes,
+);
+
+app.use(
+  '/api/options',
+  passport.authenticate('jwt', { session: false }),
+  optionsRoutes,
+);
+
+app.use(
+  '/api/parents',
+  passport.authenticate('jwt', { session: false }),
+  parentsRoutes,
+);
+
+app.use(
+  '/api/questions',
+  passport.authenticate('jwt', { session: false }),
+  questionsRoutes,
+);
+
+app.use(
+  '/api/quizzes',
+  passport.authenticate('jwt', { session: false }),
+  quizzesRoutes,
+);
+
+app.use(
+  '/api/students',
+  passport.authenticate('jwt', { session: false }),
+  studentsRoutes,
+);
+
+app.use(
+  '/api/tasks',
+  passport.authenticate('jwt', { session: false }),
+  tasksRoutes,
+);
+
+app.use(
+  '/api/teachers',
+  passport.authenticate('jwt', { session: false }),
+  teachersRoutes,
+);
+
+app.use(
+  '/api/roles',
+  passport.authenticate('jwt', { session: false }),
+  rolesRoutes,
+);
+
+app.use(
+  '/api/permissions',
+  passport.authenticate('jwt', { session: false }),
+  permissionsRoutes,
+);
+
+app.use(
+  '/api/openai',
+  passport.authenticate('jwt', { session: false }),
+  openaiRoutes,
+);
+
+app.use('/api/contact-form', contactFormRoutes);
+
+app.use(
+  '/api/search',
+  passport.authenticate('jwt', { session: false }),
+  searchRoutes,
+);
+
+const publicDir = path.join(__dirname, '../public');
+
+if (fs.existsSync(publicDir)) {
+  app.use('/', express.static(publicDir));
+
+  app.get('*', function (request, response) {
+    response.sendFile(path.resolve(publicDir, 'index.html'));
+  });
+}
+
+const PORT = process.env.NODE_ENV === 'dev_stage' ? 3000 : 8080;
+
+db.sequelize.sync().then(function () {
+  app.listen(PORT, () => {
+    console.log(`Listening on port ${PORT}`);
+  });
+});
+
+module.exports = app;

backend/src/middlewares/check-permissions.js

@@ -0,0 +1,64 @@
+const ValidationError = require('../services/notifications/errors/validation');
+
+/**
+ * @param {string} permission
+ * @return {import("express").RequestHandler}
+ */
+function checkPermissions(permission) {
+  return (req, res, next) => {
+    const { currentUser } = req;
+    if (currentUser) {
+      if (currentUser.id === req.params.id || currentUser.id === req.body.id) {
+        next();
+        return;
+      }
+      const userPermission = currentUser.custom_permissions.find(
+        (cp) => cp.name === permission,
+      );
+
+      if (userPermission) {
+        next();
+      } else {
+        if (!currentUser.app_role) {
+          return next(new ValidationError('auth.forbidden'));
+        }
+        currentUser.app_role
+          .getPermissions()
+          .then((permissions) => {
+            if (permissions.find((p) => p.name === permission)) {
+              next();
+            } else {
+              next(new ValidationError('auth.forbidden'));
+            }
+          })
+          .catch((e) => next(e));
+      }
+    } else {
+      next(new ValidationError('auth.unauthorized'));
+    }
+  };
+}
+
+const METHOD_MAP = {
+  POST: 'CREATE',
+  GET: 'READ',
+  PUT: 'UPDATE',
+  PATCH: 'UPDATE',
+  DELETE: 'DELETE',
+};
+
+/**
+ * @param {string} name
+ * @return {import("express").RequestHandler}
+ */
+function checkCrudPermissions(name) {
+  return (req, res, next) => {
+    const permissionName = `${METHOD_MAP[req.method]}_${name.toUpperCase()}`;
+    checkPermissions(permissionName)(req, res, next);
+  };
+}
+
+module.exports = {
+  checkPermissions,
+  checkCrudPermissions,
+};

backend/src/middlewares/upload.js

@@ -0,0 +1,11 @@
+const util = require('util');
+const Multer = require('multer');
+const maxSize = 10 * 1024 * 1024;
+
+let processFile = Multer({
+  storage: Multer.memoryStorage(),
+  limits: { fileSize: maxSize },
+}).single('file');
+
+let processFileMiddleware = util.promisify(processFile);
+module.exports = processFileMiddleware;

backend/src/routes/achievements.js

@@ -0,0 +1,445 @@
+const express = require('express');
+
+const AchievementsService = require('../services/achievements');
+const AchievementsDBApi = require('../db/api/achievements');
+const wrapAsync = require('../helpers').wrapAsync;
+
+const router = express.Router();
+
+const { parse } = require('json2csv');
+
+const { checkCrudPermissions } = require('../middlewares/check-permissions');
+
+router.use(checkCrudPermissions('achievements'));
+
+/**
+ *  @swagger
+ *  components:
+ *    schemas:
+ *      Achievements:
+ *        type: object
+ *        properties:
+
+ *          name:
+ *            type: string
+ *            default: name
+ *          description:
+ *            type: string
+ *            default: description
+
+ */
+
+/**
+ *  @swagger
+ * tags:
+ *   name: Achievements
+ *   description: The Achievements managing API
+ */
+
+/**
+ *  @swagger
+ *  /api/achievements:
+ *    post:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Achievements]
+ *      summary: Add new item
+ *      description: Add new item
+ *      requestBody:
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                data:
+ *                  description: Data of the updated item
+ *                  type: object
+ *                  $ref: "#/components/schemas/Achievements"
+ *      responses:
+ *        200:
+ *          description: The item was successfully added
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Achievements"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        405:
+ *          description: Invalid input data
+ *        500:
+ *          description: Some server error
+ */
+router.post(
+  '/',
+  wrapAsync(async (req, res) => {
+    const referer =
+      req.headers.referer ||
+      `${req.protocol}://${req.hostname}${req.originalUrl}`;
+    const link = new URL(referer);
+    await AchievementsService.create(
+      req.body.data,
+      req.currentUser,
+      true,
+      link.host,
+    );
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ * @swagger
+ * /api/budgets/bulk-import:
+ *  post:
+ *    security:
+ *      - bearerAuth: []
+ *    tags: [Achievements]
+ *    summary: Bulk import items
+ *    description: Bulk import items
+ *    requestBody:
+ *      required: true
+ *      content:
+ *        application/json:
+ *         schema:
+ *          properties:
+ *            data:
+ *              description: Data of the updated items
+ *              type: array
+ *              items:
+ *                $ref: "#/components/schemas/Achievements"
+ *    responses:
+ *      200:
+ *        description: The items were successfully imported
+ *    content:
+ *      application/json:
+ *        schema:
+ *          $ref: "#/components/schemas/Achievements"
+ *      401:
+ *        $ref: "#/components/responses/UnauthorizedError"
+ *      405:
+ *        description: Invalid input data
+ *      500:
+ *        description: Some server error
+ *
+ */
+router.post(
+  '/bulk-import',
+  wrapAsync(async (req, res) => {
+    const referer =
+      req.headers.referer ||
+      `${req.protocol}://${req.hostname}${req.originalUrl}`;
+    const link = new URL(referer);
+    await AchievementsService.bulkImport(req, res, true, link.host);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/achievements/{id}:
+ *    put:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Achievements]
+ *      summary: Update the data of the selected item
+ *      description: Update the data of the selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: Item ID to update
+ *          required: true
+ *          schema:
+ *            type: string
+ *      requestBody:
+ *        description: Set new item data
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                id:
+ *                  description: ID of the updated item
+ *                  type: string
+ *                data:
+ *                  description: Data of the updated item
+ *                  type: object
+ *                  $ref: "#/components/schemas/Achievements"
+ *              required:
+ *                - id
+ *      responses:
+ *        200:
+ *          description: The item data was successfully updated
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Achievements"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.put(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    await AchievementsService.update(
+      req.body.data,
+      req.body.id,
+      req.currentUser,
+    );
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ * @swagger
+ *  /api/achievements/{id}:
+ *    delete:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Achievements]
+ *      summary: Delete the selected item
+ *      description: Delete the selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: Item ID to delete
+ *          required: true
+ *          schema:
+ *            type: string
+ *      responses:
+ *        200:
+ *          description: The item was successfully deleted
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Achievements"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.delete(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    await AchievementsService.remove(req.params.id, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/achievements/deleteByIds:
+ *    post:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Achievements]
+ *      summary: Delete the selected item list
+ *      description: Delete the selected item list
+ *      requestBody:
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                ids:
+ *                  description: IDs of the updated items
+ *                  type: array
+ *      responses:
+ *        200:
+ *          description: The items was successfully deleted
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Achievements"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Items not found
+ *        500:
+ *          description: Some server error
+ */
+router.post(
+  '/deleteByIds',
+  wrapAsync(async (req, res) => {
+    await AchievementsService.deleteByIds(req.body.data, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/achievements:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Achievements]
+ *      summary: Get all achievements
+ *      description: Get all achievements
+ *      responses:
+ *        200:
+ *          description: Achievements list successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Achievements"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/',
+  wrapAsync(async (req, res) => {
+    const filetype = req.query.filetype;
+
+    const currentUser = req.currentUser;
+    const payload = await AchievementsDBApi.findAll(req.query, { currentUser });
+    if (filetype && filetype === 'csv') {
+      const fields = ['id', 'name', 'description'];
+      const opts = { fields };
+      try {
+        const csv = parse(payload.rows, opts);
+        res.status(200).attachment(csv);
+        res.send(csv);
+      } catch (err) {
+        console.error(err);
+      }
+    } else {
+      res.status(200).send(payload);
+    }
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/achievements/count:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Achievements]
+ *      summary: Count all achievements
+ *      description: Count all achievements
+ *      responses:
+ *        200:
+ *          description: Achievements count successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Achievements"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/count',
+  wrapAsync(async (req, res) => {
+    const currentUser = req.currentUser;
+    const payload = await AchievementsDBApi.findAll(req.query, null, {
+      countOnly: true,
+      currentUser,
+    });
+
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/achievements/autocomplete:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Achievements]
+ *      summary: Find all achievements that match search criteria
+ *      description: Find all achievements that match search criteria
+ *      responses:
+ *        200:
+ *          description: Achievements list successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Achievements"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get('/autocomplete', async (req, res) => {
+  const payload = await AchievementsDBApi.findAllAutocomplete(
+    req.query.query,
+    req.query.limit,
+    req.query.offset,
+  );
+
+  res.status(200).send(payload);
+});
+
+/**
+ * @swagger
+ *  /api/achievements/{id}:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Achievements]
+ *      summary: Get selected item
+ *      description: Get selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: ID of item to get
+ *          required: true
+ *          schema:
+ *            type: string
+ *      responses:
+ *        200:
+ *          description: Selected item successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Achievements"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    const payload = await AchievementsDBApi.findBy({ id: req.params.id });
+
+    res.status(200).send(payload);
+  }),
+);
+
+router.use('/', require('../helpers').commonErrorHandler);
+
+module.exports = router;

backend/src/routes/auth.js

@@ -0,0 +1,268 @@
+const express = require('express');
+const passport = require('passport');
+
+const config = require('../config');
+const AuthService = require('../services/auth');
+const ForbiddenError = require('../services/notifications/errors/forbidden');
+const EmailSender = require('../services/email');
+const wrapAsync = require('../helpers').wrapAsync;
+
+const router = express.Router();
+
+/**
+ *  @swagger
+ *  components:
+ *    schemas:
+ *      Auth:
+ *        type: object
+ *        required:
+ *          - email
+ *          - password
+ *        properties:
+ *          email:
+ *            type: string
+ *            default: admin@flatlogic.com
+ *            description: User email
+ *          password:
+ *            type: string
+ *            default: password
+ *            description: User password
+ */
+
+/**
+ * @swagger
+ * tags:
+ *   name: Auth
+ *   description: Authorization operations
+ */
+
+/**
+ * @swagger
+ *  /api/auth/signin/local:
+ *    post:
+ *      tags: [Auth]
+ *      summary: Logs user into the system
+ *      description: Logs user into the system
+ *      requestBody:
+ *        description: Set valid user email and password
+ *        content:
+ *          application/json:
+ *            schema:
+ *              $ref: "#/components/schemas/Auth"
+ *      responses:
+ *        200:
+ *          description: Successful login
+ *        400:
+ *          description: Invalid username/password supplied
+ *      x-codegen-request-body-name: body
+ */
+
+router.post(
+  '/signin/local',
+  wrapAsync(async (req, res) => {
+    const payload = await AuthService.signin(
+      req.body.email,
+      req.body.password,
+      req,
+    );
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ * @swagger
+ *  /api/auth/me:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Auth]
+ *      summary: Get current authorized user info
+ *      description: Get current authorized user info
+ *      responses:
+ *        200:
+ *          description: Successful retrieval of current authorized user data
+ *        400:
+ *          description: Invalid username/password supplied
+ *      x-codegen-request-body-name: body
+ */
+
+router.get(
+  '/me',
+  passport.authenticate('jwt', { session: false }),
+  (req, res) => {
+    if (!req.currentUser || !req.currentUser.id) {
+      throw new ForbiddenError();
+    }
+
+    const payload = req.currentUser;
+    delete payload.password;
+    res.status(200).send(payload);
+  },
+);
+
+router.put(
+  '/password-reset',
+  wrapAsync(async (req, res) => {
+    const payload = await AuthService.passwordReset(
+      req.body.token,
+      req.body.password,
+      req,
+    );
+    res.status(200).send(payload);
+  }),
+);
+
+router.put(
+  '/password-update',
+  passport.authenticate('jwt', { session: false }),
+  wrapAsync(async (req, res) => {
+    const payload = await AuthService.passwordUpdate(
+      req.body.currentPassword,
+      req.body.newPassword,
+      req,
+    );
+    res.status(200).send(payload);
+  }),
+);
+
+router.post(
+  '/send-email-address-verification-email',
+  passport.authenticate('jwt', { session: false }),
+  wrapAsync(async (req, res) => {
+    if (!req.currentUser) {
+      throw new ForbiddenError();
+    }
+
+    await AuthService.sendEmailAddressVerificationEmail(req.currentUser.email);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+router.post(
+  '/send-password-reset-email',
+  wrapAsync(async (req, res) => {
+    const link = new URL(req.headers.referer);
+    await AuthService.sendPasswordResetEmail(
+      req.body.email,
+      'register',
+      link.host,
+    );
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ * @swagger
+ *  /api/auth/signup:
+ *    post:
+ *      tags: [Auth]
+ *      summary: Register new user into the system
+ *      description: Register new user into the system
+ *      requestBody:
+ *        description: Set valid user email and password
+ *        content:
+ *          application/json:
+ *            schema:
+ *              $ref: "#/components/schemas/Auth"
+ *      responses:
+ *        200:
+ *          description: New user successfully signed up
+ *        400:
+ *          description: Invalid username/password supplied
+ *        500:
+ *          description: Some server error
+ *      x-codegen-request-body-name: body
+ */
+
+router.post(
+  '/signup',
+  wrapAsync(async (req, res) => {
+    const link = new URL(req.headers.referer);
+    const payload = await AuthService.signup(
+      req.body.email,
+      req.body.password,
+
+      req,
+      link.host,
+    );
+    res.status(200).send(payload);
+  }),
+);
+
+router.put(
+  '/profile',
+  passport.authenticate('jwt', { session: false }),
+  wrapAsync(async (req, res) => {
+    if (!req.currentUser || !req.currentUser.id) {
+      throw new ForbiddenError();
+    }
+
+    await AuthService.updateProfile(req.body.profile, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+router.put(
+  '/verify-email',
+  wrapAsync(async (req, res) => {
+    const payload = await AuthService.verifyEmail(
+      req.body.token,
+      req,
+      req.headers.referer,
+    );
+    res.status(200).send(payload);
+  }),
+);
+
+router.get('/email-configured', (req, res) => {
+  const payload = EmailSender.isConfigured;
+  res.status(200).send(payload);
+});
+
+router.get('/signin/google', (req, res, next) => {
+  passport.authenticate('google', {
+    scope: ['profile', 'email'],
+    state: req.query.app,
+  })(req, res, next);
+});
+
+router.get(
+  '/signin/google/callback',
+  passport.authenticate('google', {
+    failureRedirect: '/login',
+    session: false,
+  }),
+
+  function (req, res) {
+    socialRedirect(res, req.query.state, req.user.token, config);
+  },
+);
+
+router.get('/signin/microsoft', (req, res, next) => {
+  passport.authenticate('microsoft', {
+    scope: ['https://graph.microsoft.com/user.read openid'],
+    state: req.query.app,
+  })(req, res, next);
+});
+
+router.get(
+  '/signin/microsoft/callback',
+  passport.authenticate('microsoft', {
+    failureRedirect: '/login',
+    session: false,
+  }),
+  function (req, res) {
+    socialRedirect(res, req.query.state, req.user.token, config);
+  },
+);
+
+router.use('/', require('../helpers').commonErrorHandler);
+
+function socialRedirect(res, state, token, config) {
+  res.redirect(config.uiUrl + '/login?token=' + token);
+}
+
+module.exports = router;

backend/src/routes/contactForm.js

@@ -0,0 +1,33 @@
+const express = require('express');
+const router = express.Router();
+const EmailSender = require('../services/email');
+
+router.post('/send', async (req, res) => {
+  try {
+    const { email, subject, message } = req.body;
+
+    if (!email || !subject || !message) {
+      return res.status(400).json({ error: 'All fields are required' });
+    }
+
+    const emailSender = new EmailSender({
+      to: 'krishkpatelk2005@gmail.com',
+      subject: subject,
+      html: () => `
+          <p><strong>From:</strong> ${email}</p>
+          <p><strong>Subject:</strong> ${subject}</p>
+          <p><strong>Message:</strong></p>
+          <p>${message}</p>
+        `,
+      text: () => `From: ${email}\nSubject: ${subject}\nMessage:\n${message}`,
+    });
+
+    await emailSender.send();
+    res.status(200).json({ message: 'Email sent successfully' });
+  } catch (error) {
+    console.error('Error sending email:', error);
+    res.status(500).json({ error: 'Error sending email' });
+  }
+});
+
+module.exports = router;

backend/src/routes/courses.js

@@ -0,0 +1,441 @@
+const express = require('express');
+
+const CoursesService = require('../services/courses');
+const CoursesDBApi = require('../db/api/courses');
+const wrapAsync = require('../helpers').wrapAsync;
+
+const router = express.Router();
+
+const { parse } = require('json2csv');
+
+const { checkCrudPermissions } = require('../middlewares/check-permissions');
+
+router.use(checkCrudPermissions('courses'));
+
+/**
+ *  @swagger
+ *  components:
+ *    schemas:
+ *      Courses:
+ *        type: object
+ *        properties:
+
+ *          title:
+ *            type: string
+ *            default: title
+ *          description:
+ *            type: string
+ *            default: description
+
+ */
+
+/**
+ *  @swagger
+ * tags:
+ *   name: Courses
+ *   description: The Courses managing API
+ */
+
+/**
+ *  @swagger
+ *  /api/courses:
+ *    post:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Courses]
+ *      summary: Add new item
+ *      description: Add new item
+ *      requestBody:
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                data:
+ *                  description: Data of the updated item
+ *                  type: object
+ *                  $ref: "#/components/schemas/Courses"
+ *      responses:
+ *        200:
+ *          description: The item was successfully added
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Courses"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        405:
+ *          description: Invalid input data
+ *        500:
+ *          description: Some server error
+ */
+router.post(
+  '/',
+  wrapAsync(async (req, res) => {
+    const referer =
+      req.headers.referer ||
+      `${req.protocol}://${req.hostname}${req.originalUrl}`;
+    const link = new URL(referer);
+    await CoursesService.create(
+      req.body.data,
+      req.currentUser,
+      true,
+      link.host,
+    );
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ * @swagger
+ * /api/budgets/bulk-import:
+ *  post:
+ *    security:
+ *      - bearerAuth: []
+ *    tags: [Courses]
+ *    summary: Bulk import items
+ *    description: Bulk import items
+ *    requestBody:
+ *      required: true
+ *      content:
+ *        application/json:
+ *         schema:
+ *          properties:
+ *            data:
+ *              description: Data of the updated items
+ *              type: array
+ *              items:
+ *                $ref: "#/components/schemas/Courses"
+ *    responses:
+ *      200:
+ *        description: The items were successfully imported
+ *    content:
+ *      application/json:
+ *        schema:
+ *          $ref: "#/components/schemas/Courses"
+ *      401:
+ *        $ref: "#/components/responses/UnauthorizedError"
+ *      405:
+ *        description: Invalid input data
+ *      500:
+ *        description: Some server error
+ *
+ */
+router.post(
+  '/bulk-import',
+  wrapAsync(async (req, res) => {
+    const referer =
+      req.headers.referer ||
+      `${req.protocol}://${req.hostname}${req.originalUrl}`;
+    const link = new URL(referer);
+    await CoursesService.bulkImport(req, res, true, link.host);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/courses/{id}:
+ *    put:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Courses]
+ *      summary: Update the data of the selected item
+ *      description: Update the data of the selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: Item ID to update
+ *          required: true
+ *          schema:
+ *            type: string
+ *      requestBody:
+ *        description: Set new item data
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                id:
+ *                  description: ID of the updated item
+ *                  type: string
+ *                data:
+ *                  description: Data of the updated item
+ *                  type: object
+ *                  $ref: "#/components/schemas/Courses"
+ *              required:
+ *                - id
+ *      responses:
+ *        200:
+ *          description: The item data was successfully updated
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Courses"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.put(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    await CoursesService.update(req.body.data, req.body.id, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ * @swagger
+ *  /api/courses/{id}:
+ *    delete:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Courses]
+ *      summary: Delete the selected item
+ *      description: Delete the selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: Item ID to delete
+ *          required: true
+ *          schema:
+ *            type: string
+ *      responses:
+ *        200:
+ *          description: The item was successfully deleted
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Courses"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.delete(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    await CoursesService.remove(req.params.id, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/courses/deleteByIds:
+ *    post:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Courses]
+ *      summary: Delete the selected item list
+ *      description: Delete the selected item list
+ *      requestBody:
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                ids:
+ *                  description: IDs of the updated items
+ *                  type: array
+ *      responses:
+ *        200:
+ *          description: The items was successfully deleted
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Courses"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Items not found
+ *        500:
+ *          description: Some server error
+ */
+router.post(
+  '/deleteByIds',
+  wrapAsync(async (req, res) => {
+    await CoursesService.deleteByIds(req.body.data, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/courses:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Courses]
+ *      summary: Get all courses
+ *      description: Get all courses
+ *      responses:
+ *        200:
+ *          description: Courses list successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Courses"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/',
+  wrapAsync(async (req, res) => {
+    const filetype = req.query.filetype;
+
+    const currentUser = req.currentUser;
+    const payload = await CoursesDBApi.findAll(req.query, { currentUser });
+    if (filetype && filetype === 'csv') {
+      const fields = ['id', 'title', 'description'];
+      const opts = { fields };
+      try {
+        const csv = parse(payload.rows, opts);
+        res.status(200).attachment(csv);
+        res.send(csv);
+      } catch (err) {
+        console.error(err);
+      }
+    } else {
+      res.status(200).send(payload);
+    }
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/courses/count:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Courses]
+ *      summary: Count all courses
+ *      description: Count all courses
+ *      responses:
+ *        200:
+ *          description: Courses count successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Courses"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/count',
+  wrapAsync(async (req, res) => {
+    const currentUser = req.currentUser;
+    const payload = await CoursesDBApi.findAll(req.query, null, {
+      countOnly: true,
+      currentUser,
+    });
+
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/courses/autocomplete:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Courses]
+ *      summary: Find all courses that match search criteria
+ *      description: Find all courses that match search criteria
+ *      responses:
+ *        200:
+ *          description: Courses list successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Courses"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get('/autocomplete', async (req, res) => {
+  const payload = await CoursesDBApi.findAllAutocomplete(
+    req.query.query,
+    req.query.limit,
+    req.query.offset,
+  );
+
+  res.status(200).send(payload);
+});
+
+/**
+ * @swagger
+ *  /api/courses/{id}:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Courses]
+ *      summary: Get selected item
+ *      description: Get selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: ID of item to get
+ *          required: true
+ *          schema:
+ *            type: string
+ *      responses:
+ *        200:
+ *          description: Selected item successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Courses"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    const payload = await CoursesDBApi.findBy({ id: req.params.id });
+
+    res.status(200).send(payload);
+  }),
+);
+
+router.use('/', require('../helpers').commonErrorHandler);
+
+module.exports = router;

backend/src/routes/file.js

@@ -0,0 +1,40 @@
+const express = require('express');
+const config = require('../config');
+const path = require('path');
+const passport = require('passport');
+const services = require('../services/file');
+const router = express.Router();
+
+router.get('/download', (req, res) => {
+  if (
+    process.env.NODE_ENV == 'production' ||
+    process.env.NEXT_PUBLIC_BACK_API
+  ) {
+    services.downloadGCloud(req, res);
+  } else {
+    services.downloadLocal(req, res);
+  }
+});
+
+router.post(
+  '/upload/:table/:field',
+  passport.authenticate('jwt', { session: false }),
+  (req, res) => {
+    const fileName = `${req.params.table}/${req.params.field}`;
+
+    if (
+      process.env.NODE_ENV == 'production' ||
+      process.env.NEXT_PUBLIC_BACK_API
+    ) {
+      services.uploadGCloud(fileName, req, res);
+    } else {
+      services.uploadLocal(fileName, {
+        entity: null,
+        maxFileSize: 10 * 1024 * 1024,
+        folderIncludesAuthenticationUid: false,
+      })(req, res);
+    }
+  },
+);
+
+module.exports = router;

backend/src/routes/openai.js

@@ -0,0 +1,180 @@
+const express = require('express');
+const db = require('../db/models');
+const wrapAsync = require('../helpers').wrapAsync;
+const router = express.Router();
+const sjs = require('sequelize-json-schema');
+const { getWidget } = require('../services/openai');
+const RolesService = require('../services/roles');
+const RolesDBApi = require('../db/api/roles');
+
+/**
+ * @swagger
+ * /api/roles/roles-info/{infoId}:
+ *   delete:
+ *     security:
+ *       - bearerAuth: []
+ *     tags: [Roles]
+ *     summary: Remove role information by ID
+ *     description: Remove specific role information by ID
+ *     parameters:
+ *       - in: path
+ *         name: infoId
+ *         description: ID of role information to remove
+ *         required: true
+ *         schema:
+ *           type: string
+ *       - in: query
+ *         name: userId
+ *         description: ID of the user
+ *         required: true
+ *         schema:
+ *           type: string
+ *       - in: query
+ *         name: key
+ *         description: Key of the role information to remove
+ *         required: true
+ *         schema:
+ *           type: string
+ *     responses:
+ *       200:
+ *         description: Role information successfully removed
+ *         content:
+ *           application/json:
+ *             schema:
+ *               type: object
+ *               properties:
+ *                 user:
+ *                   type: string
+ *                   description: The user information
+ *       400:
+ *         description: Invalid ID or key supplied
+ *       401:
+ *         $ref: "#/components/responses/UnauthorizedError"
+ *       404:
+ *         description: Role not found
+ *       500:
+ *         description: Some server error
+ */
+
+router.delete(
+  '/roles-info/:infoId',
+  wrapAsync(async (req, res) => {
+    const role = await RolesService.removeRoleInfoById(
+      req.query.infoId,
+      req.query.roleId,
+      req.query.key,
+      req.currentUser,
+    );
+
+    res.status(200).send(role);
+  }),
+);
+
+/**
+ * @swagger
+ * /api/roles/role-info/{roleId}:
+ *   get:
+ *     security:
+ *       - bearerAuth: []
+ *     tags: [Roles]
+ *     summary: Get role information by key
+ *     description: Get specific role information by key
+ *     parameters:
+ *       - in: path
+ *         name: roleId
+ *         description: ID of role to get information for
+ *         required: true
+ *         schema:
+ *           type: string
+ *       - in: query
+ *         name: key
+ *         description: Key of the role information to retrieve
+ *         required: true
+ *         schema:
+ *           type: string
+ *     responses:
+ *       200:
+ *         description: Role information successfully received
+ *         content:
+ *           application/json:
+ *             schema:
+ *               type: object
+ *               properties:
+ *                 info:
+ *                   type: string
+ *                   description: The role information
+ *       400:
+ *         description: Invalid ID or key supplied
+ *       401:
+ *         $ref: "#/components/responses/UnauthorizedError"
+ *       404:
+ *         description: Role not found
+ *       500:
+ *         description: Some server error
+ */
+
+router.get(
+  '/info-by-key',
+  wrapAsync(async (req, res) => {
+    const roleId = req.query.roleId;
+    const key = req.query.key;
+    const currentUser = req.currentUser;
+    let info = await RolesService.getRoleInfoByKey(key, roleId, currentUser);
+    const role = await RolesDBApi.findBy({ id: roleId });
+    if (!role?.role_customization) {
+      await Promise.all(
+        ['pie', 'bar'].map(async (e) => {
+          const schema = await sjs.getSequelizeSchema(db.sequelize, {});
+          const payload = {
+            description: `Create some cool ${e} chart`,
+            modelDefinition: schema.definitions,
+          };
+          const widgetId = await getWidget(payload, currentUser?.id, roleId);
+          if (widgetId) {
+            await RolesService.addRoleInfo(
+              roleId,
+              currentUser?.id,
+              'widgets',
+              widgetId,
+              req.currentUser,
+            );
+          }
+        }),
+      );
+      info = await RolesService.getRoleInfoByKey(key, roleId, currentUser);
+    }
+    res.status(200).send(info);
+  }),
+);
+
+router.post(
+  '/create_widget',
+  wrapAsync(async (req, res) => {
+    const { description, userId, roleId } = req.body;
+
+    const currentUser = req.currentUser;
+    const schema = await sjs.getSequelizeSchema(db.sequelize, {});
+    const payload = {
+      description,
+      modelDefinition: schema.definitions,
+    };
+
+    const widgetId = await getWidget(payload, userId, roleId);
+
+    if (widgetId) {
+      await RolesService.addRoleInfo(
+        roleId,
+        userId,
+        'widgets',
+        widgetId,
+        currentUser,
+      );
+
+      return res.status(200).send(widgetId);
+    } else {
+      return res.status(400).send(widgetId);
+    }
+  }),
+);
+
+module.exports = router;

backend/src/routes/options.js

@@ -0,0 +1,438 @@
+const express = require('express');
+
+const OptionsService = require('../services/options');
+const OptionsDBApi = require('../db/api/options');
+const wrapAsync = require('../helpers').wrapAsync;
+
+const router = express.Router();
+
+const { parse } = require('json2csv');
+
+const { checkCrudPermissions } = require('../middlewares/check-permissions');
+
+router.use(checkCrudPermissions('options'));
+
+/**
+ *  @swagger
+ *  components:
+ *    schemas:
+ *      Options:
+ *        type: object
+ *        properties:
+
+ *          text:
+ *            type: string
+ *            default: text
+
+ */
+
+/**
+ *  @swagger
+ * tags:
+ *   name: Options
+ *   description: The Options managing API
+ */
+
+/**
+ *  @swagger
+ *  /api/options:
+ *    post:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Options]
+ *      summary: Add new item
+ *      description: Add new item
+ *      requestBody:
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                data:
+ *                  description: Data of the updated item
+ *                  type: object
+ *                  $ref: "#/components/schemas/Options"
+ *      responses:
+ *        200:
+ *          description: The item was successfully added
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Options"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        405:
+ *          description: Invalid input data
+ *        500:
+ *          description: Some server error
+ */
+router.post(
+  '/',
+  wrapAsync(async (req, res) => {
+    const referer =
+      req.headers.referer ||
+      `${req.protocol}://${req.hostname}${req.originalUrl}`;
+    const link = new URL(referer);
+    await OptionsService.create(
+      req.body.data,
+      req.currentUser,
+      true,
+      link.host,
+    );
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ * @swagger
+ * /api/budgets/bulk-import:
+ *  post:
+ *    security:
+ *      - bearerAuth: []
+ *    tags: [Options]
+ *    summary: Bulk import items
+ *    description: Bulk import items
+ *    requestBody:
+ *      required: true
+ *      content:
+ *        application/json:
+ *         schema:
+ *          properties:
+ *            data:
+ *              description: Data of the updated items
+ *              type: array
+ *              items:
+ *                $ref: "#/components/schemas/Options"
+ *    responses:
+ *      200:
+ *        description: The items were successfully imported
+ *    content:
+ *      application/json:
+ *        schema:
+ *          $ref: "#/components/schemas/Options"
+ *      401:
+ *        $ref: "#/components/responses/UnauthorizedError"
+ *      405:
+ *        description: Invalid input data
+ *      500:
+ *        description: Some server error
+ *
+ */
+router.post(
+  '/bulk-import',
+  wrapAsync(async (req, res) => {
+    const referer =
+      req.headers.referer ||
+      `${req.protocol}://${req.hostname}${req.originalUrl}`;
+    const link = new URL(referer);
+    await OptionsService.bulkImport(req, res, true, link.host);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/options/{id}:
+ *    put:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Options]
+ *      summary: Update the data of the selected item
+ *      description: Update the data of the selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: Item ID to update
+ *          required: true
+ *          schema:
+ *            type: string
+ *      requestBody:
+ *        description: Set new item data
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                id:
+ *                  description: ID of the updated item
+ *                  type: string
+ *                data:
+ *                  description: Data of the updated item
+ *                  type: object
+ *                  $ref: "#/components/schemas/Options"
+ *              required:
+ *                - id
+ *      responses:
+ *        200:
+ *          description: The item data was successfully updated
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Options"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.put(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    await OptionsService.update(req.body.data, req.body.id, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ * @swagger
+ *  /api/options/{id}:
+ *    delete:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Options]
+ *      summary: Delete the selected item
+ *      description: Delete the selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: Item ID to delete
+ *          required: true
+ *          schema:
+ *            type: string
+ *      responses:
+ *        200:
+ *          description: The item was successfully deleted
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Options"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.delete(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    await OptionsService.remove(req.params.id, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/options/deleteByIds:
+ *    post:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Options]
+ *      summary: Delete the selected item list
+ *      description: Delete the selected item list
+ *      requestBody:
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                ids:
+ *                  description: IDs of the updated items
+ *                  type: array
+ *      responses:
+ *        200:
+ *          description: The items was successfully deleted
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Options"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Items not found
+ *        500:
+ *          description: Some server error
+ */
+router.post(
+  '/deleteByIds',
+  wrapAsync(async (req, res) => {
+    await OptionsService.deleteByIds(req.body.data, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/options:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Options]
+ *      summary: Get all options
+ *      description: Get all options
+ *      responses:
+ *        200:
+ *          description: Options list successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Options"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/',
+  wrapAsync(async (req, res) => {
+    const filetype = req.query.filetype;
+
+    const currentUser = req.currentUser;
+    const payload = await OptionsDBApi.findAll(req.query, { currentUser });
+    if (filetype && filetype === 'csv') {
+      const fields = ['id', 'text'];
+      const opts = { fields };
+      try {
+        const csv = parse(payload.rows, opts);
+        res.status(200).attachment(csv);
+        res.send(csv);
+      } catch (err) {
+        console.error(err);
+      }
+    } else {
+      res.status(200).send(payload);
+    }
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/options/count:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Options]
+ *      summary: Count all options
+ *      description: Count all options
+ *      responses:
+ *        200:
+ *          description: Options count successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Options"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/count',
+  wrapAsync(async (req, res) => {
+    const currentUser = req.currentUser;
+    const payload = await OptionsDBApi.findAll(req.query, null, {
+      countOnly: true,
+      currentUser,
+    });
+
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/options/autocomplete:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Options]
+ *      summary: Find all options that match search criteria
+ *      description: Find all options that match search criteria
+ *      responses:
+ *        200:
+ *          description: Options list successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Options"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get('/autocomplete', async (req, res) => {
+  const payload = await OptionsDBApi.findAllAutocomplete(
+    req.query.query,
+    req.query.limit,
+    req.query.offset,
+  );
+
+  res.status(200).send(payload);
+});
+
+/**
+ * @swagger
+ *  /api/options/{id}:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Options]
+ *      summary: Get selected item
+ *      description: Get selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: ID of item to get
+ *          required: true
+ *          schema:
+ *            type: string
+ *      responses:
+ *        200:
+ *          description: Selected item successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Options"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    const payload = await OptionsDBApi.findBy({ id: req.params.id });
+
+    res.status(200).send(payload);
+  }),
+);
+
+router.use('/', require('../helpers').commonErrorHandler);
+
+module.exports = router;

backend/src/routes/parents.js

@@ -0,0 +1,438 @@
+const express = require('express');
+
+const ParentsService = require('../services/parents');
+const ParentsDBApi = require('../db/api/parents');
+const wrapAsync = require('../helpers').wrapAsync;
+
+const router = express.Router();
+
+const { parse } = require('json2csv');
+
+const { checkCrudPermissions } = require('../middlewares/check-permissions');
+
+router.use(checkCrudPermissions('parents'));
+
+/**
+ *  @swagger
+ *  components:
+ *    schemas:
+ *      Parents:
+ *        type: object
+ *        properties:
+
+ *          name:
+ *            type: string
+ *            default: name
+
+ */
+
+/**
+ *  @swagger
+ * tags:
+ *   name: Parents
+ *   description: The Parents managing API
+ */
+
+/**
+ *  @swagger
+ *  /api/parents:
+ *    post:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Parents]
+ *      summary: Add new item
+ *      description: Add new item
+ *      requestBody:
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                data:
+ *                  description: Data of the updated item
+ *                  type: object
+ *                  $ref: "#/components/schemas/Parents"
+ *      responses:
+ *        200:
+ *          description: The item was successfully added
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Parents"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        405:
+ *          description: Invalid input data
+ *        500:
+ *          description: Some server error
+ */
+router.post(
+  '/',
+  wrapAsync(async (req, res) => {
+    const referer =
+      req.headers.referer ||
+      `${req.protocol}://${req.hostname}${req.originalUrl}`;
+    const link = new URL(referer);
+    await ParentsService.create(
+      req.body.data,
+      req.currentUser,
+      true,
+      link.host,
+    );
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ * @swagger
+ * /api/budgets/bulk-import:
+ *  post:
+ *    security:
+ *      - bearerAuth: []
+ *    tags: [Parents]
+ *    summary: Bulk import items
+ *    description: Bulk import items
+ *    requestBody:
+ *      required: true
+ *      content:
+ *        application/json:
+ *         schema:
+ *          properties:
+ *            data:
+ *              description: Data of the updated items
+ *              type: array
+ *              items:
+ *                $ref: "#/components/schemas/Parents"
+ *    responses:
+ *      200:
+ *        description: The items were successfully imported
+ *    content:
+ *      application/json:
+ *        schema:
+ *          $ref: "#/components/schemas/Parents"
+ *      401:
+ *        $ref: "#/components/responses/UnauthorizedError"
+ *      405:
+ *        description: Invalid input data
+ *      500:
+ *        description: Some server error
+ *
+ */
+router.post(
+  '/bulk-import',
+  wrapAsync(async (req, res) => {
+    const referer =
+      req.headers.referer ||
+      `${req.protocol}://${req.hostname}${req.originalUrl}`;
+    const link = new URL(referer);
+    await ParentsService.bulkImport(req, res, true, link.host);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/parents/{id}:
+ *    put:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Parents]
+ *      summary: Update the data of the selected item
+ *      description: Update the data of the selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: Item ID to update
+ *          required: true
+ *          schema:
+ *            type: string
+ *      requestBody:
+ *        description: Set new item data
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                id:
+ *                  description: ID of the updated item
+ *                  type: string
+ *                data:
+ *                  description: Data of the updated item
+ *                  type: object
+ *                  $ref: "#/components/schemas/Parents"
+ *              required:
+ *                - id
+ *      responses:
+ *        200:
+ *          description: The item data was successfully updated
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Parents"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.put(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    await ParentsService.update(req.body.data, req.body.id, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ * @swagger
+ *  /api/parents/{id}:
+ *    delete:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Parents]
+ *      summary: Delete the selected item
+ *      description: Delete the selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: Item ID to delete
+ *          required: true
+ *          schema:
+ *            type: string
+ *      responses:
+ *        200:
+ *          description: The item was successfully deleted
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Parents"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.delete(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    await ParentsService.remove(req.params.id, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/parents/deleteByIds:
+ *    post:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Parents]
+ *      summary: Delete the selected item list
+ *      description: Delete the selected item list
+ *      requestBody:
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                ids:
+ *                  description: IDs of the updated items
+ *                  type: array
+ *      responses:
+ *        200:
+ *          description: The items was successfully deleted
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Parents"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Items not found
+ *        500:
+ *          description: Some server error
+ */
+router.post(
+  '/deleteByIds',
+  wrapAsync(async (req, res) => {
+    await ParentsService.deleteByIds(req.body.data, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/parents:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Parents]
+ *      summary: Get all parents
+ *      description: Get all parents
+ *      responses:
+ *        200:
+ *          description: Parents list successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Parents"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/',
+  wrapAsync(async (req, res) => {
+    const filetype = req.query.filetype;
+
+    const currentUser = req.currentUser;
+    const payload = await ParentsDBApi.findAll(req.query, { currentUser });
+    if (filetype && filetype === 'csv') {
+      const fields = ['id', 'name'];
+      const opts = { fields };
+      try {
+        const csv = parse(payload.rows, opts);
+        res.status(200).attachment(csv);
+        res.send(csv);
+      } catch (err) {
+        console.error(err);
+      }
+    } else {
+      res.status(200).send(payload);
+    }
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/parents/count:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Parents]
+ *      summary: Count all parents
+ *      description: Count all parents
+ *      responses:
+ *        200:
+ *          description: Parents count successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Parents"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/count',
+  wrapAsync(async (req, res) => {
+    const currentUser = req.currentUser;
+    const payload = await ParentsDBApi.findAll(req.query, null, {
+      countOnly: true,
+      currentUser,
+    });
+
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/parents/autocomplete:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Parents]
+ *      summary: Find all parents that match search criteria
+ *      description: Find all parents that match search criteria
+ *      responses:
+ *        200:
+ *          description: Parents list successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Parents"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get('/autocomplete', async (req, res) => {
+  const payload = await ParentsDBApi.findAllAutocomplete(
+    req.query.query,
+    req.query.limit,
+    req.query.offset,
+  );
+
+  res.status(200).send(payload);
+});
+
+/**
+ * @swagger
+ *  /api/parents/{id}:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Parents]
+ *      summary: Get selected item
+ *      description: Get selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: ID of item to get
+ *          required: true
+ *          schema:
+ *            type: string
+ *      responses:
+ *        200:
+ *          description: Selected item successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Parents"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    const payload = await ParentsDBApi.findBy({ id: req.params.id });
+
+    res.status(200).send(payload);
+  }),
+);
+
+router.use('/', require('../helpers').commonErrorHandler);
+
+module.exports = router;

backend/src/routes/permissions.js

@@ -0,0 +1,442 @@
+const express = require('express');
+
+const PermissionsService = require('../services/permissions');
+const PermissionsDBApi = require('../db/api/permissions');
+const wrapAsync = require('../helpers').wrapAsync;
+
+const router = express.Router();
+
+const { parse } = require('json2csv');
+
+const { checkCrudPermissions } = require('../middlewares/check-permissions');
+
+router.use(checkCrudPermissions('permissions'));
+
+/**
+ *  @swagger
+ *  components:
+ *    schemas:
+ *      Permissions:
+ *        type: object
+ *        properties:
+
+ *          name:
+ *            type: string
+ *            default: name
+
+ */
+
+/**
+ *  @swagger
+ * tags:
+ *   name: Permissions
+ *   description: The Permissions managing API
+ */
+
+/**
+ *  @swagger
+ *  /api/permissions:
+ *    post:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Permissions]
+ *      summary: Add new item
+ *      description: Add new item
+ *      requestBody:
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                data:
+ *                  description: Data of the updated item
+ *                  type: object
+ *                  $ref: "#/components/schemas/Permissions"
+ *      responses:
+ *        200:
+ *          description: The item was successfully added
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Permissions"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        405:
+ *          description: Invalid input data
+ *        500:
+ *          description: Some server error
+ */
+router.post(
+  '/',
+  wrapAsync(async (req, res) => {
+    const referer =
+      req.headers.referer ||
+      `${req.protocol}://${req.hostname}${req.originalUrl}`;
+    const link = new URL(referer);
+    await PermissionsService.create(
+      req.body.data,
+      req.currentUser,
+      true,
+      link.host,
+    );
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ * @swagger
+ * /api/budgets/bulk-import:
+ *  post:
+ *    security:
+ *      - bearerAuth: []
+ *    tags: [Permissions]
+ *    summary: Bulk import items
+ *    description: Bulk import items
+ *    requestBody:
+ *      required: true
+ *      content:
+ *        application/json:
+ *         schema:
+ *          properties:
+ *            data:
+ *              description: Data of the updated items
+ *              type: array
+ *              items:
+ *                $ref: "#/components/schemas/Permissions"
+ *    responses:
+ *      200:
+ *        description: The items were successfully imported
+ *    content:
+ *      application/json:
+ *        schema:
+ *          $ref: "#/components/schemas/Permissions"
+ *      401:
+ *        $ref: "#/components/responses/UnauthorizedError"
+ *      405:
+ *        description: Invalid input data
+ *      500:
+ *        description: Some server error
+ *
+ */
+router.post(
+  '/bulk-import',
+  wrapAsync(async (req, res) => {
+    const referer =
+      req.headers.referer ||
+      `${req.protocol}://${req.hostname}${req.originalUrl}`;
+    const link = new URL(referer);
+    await PermissionsService.bulkImport(req, res, true, link.host);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/permissions/{id}:
+ *    put:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Permissions]
+ *      summary: Update the data of the selected item
+ *      description: Update the data of the selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: Item ID to update
+ *          required: true
+ *          schema:
+ *            type: string
+ *      requestBody:
+ *        description: Set new item data
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                id:
+ *                  description: ID of the updated item
+ *                  type: string
+ *                data:
+ *                  description: Data of the updated item
+ *                  type: object
+ *                  $ref: "#/components/schemas/Permissions"
+ *              required:
+ *                - id
+ *      responses:
+ *        200:
+ *          description: The item data was successfully updated
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Permissions"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.put(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    await PermissionsService.update(
+      req.body.data,
+      req.body.id,
+      req.currentUser,
+    );
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ * @swagger
+ *  /api/permissions/{id}:
+ *    delete:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Permissions]
+ *      summary: Delete the selected item
+ *      description: Delete the selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: Item ID to delete
+ *          required: true
+ *          schema:
+ *            type: string
+ *      responses:
+ *        200:
+ *          description: The item was successfully deleted
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Permissions"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.delete(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    await PermissionsService.remove(req.params.id, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/permissions/deleteByIds:
+ *    post:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Permissions]
+ *      summary: Delete the selected item list
+ *      description: Delete the selected item list
+ *      requestBody:
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                ids:
+ *                  description: IDs of the updated items
+ *                  type: array
+ *      responses:
+ *        200:
+ *          description: The items was successfully deleted
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Permissions"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Items not found
+ *        500:
+ *          description: Some server error
+ */
+router.post(
+  '/deleteByIds',
+  wrapAsync(async (req, res) => {
+    await PermissionsService.deleteByIds(req.body.data, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/permissions:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Permissions]
+ *      summary: Get all permissions
+ *      description: Get all permissions
+ *      responses:
+ *        200:
+ *          description: Permissions list successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Permissions"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/',
+  wrapAsync(async (req, res) => {
+    const filetype = req.query.filetype;
+
+    const currentUser = req.currentUser;
+    const payload = await PermissionsDBApi.findAll(req.query, { currentUser });
+    if (filetype && filetype === 'csv') {
+      const fields = ['id', 'name'];
+      const opts = { fields };
+      try {
+        const csv = parse(payload.rows, opts);
+        res.status(200).attachment(csv);
+        res.send(csv);
+      } catch (err) {
+        console.error(err);
+      }
+    } else {
+      res.status(200).send(payload);
+    }
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/permissions/count:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Permissions]
+ *      summary: Count all permissions
+ *      description: Count all permissions
+ *      responses:
+ *        200:
+ *          description: Permissions count successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Permissions"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/count',
+  wrapAsync(async (req, res) => {
+    const currentUser = req.currentUser;
+    const payload = await PermissionsDBApi.findAll(req.query, null, {
+      countOnly: true,
+      currentUser,
+    });
+
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/permissions/autocomplete:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Permissions]
+ *      summary: Find all permissions that match search criteria
+ *      description: Find all permissions that match search criteria
+ *      responses:
+ *        200:
+ *          description: Permissions list successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Permissions"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get('/autocomplete', async (req, res) => {
+  const payload = await PermissionsDBApi.findAllAutocomplete(
+    req.query.query,
+    req.query.limit,
+    req.query.offset,
+  );
+
+  res.status(200).send(payload);
+});
+
+/**
+ * @swagger
+ *  /api/permissions/{id}:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Permissions]
+ *      summary: Get selected item
+ *      description: Get selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: ID of item to get
+ *          required: true
+ *          schema:
+ *            type: string
+ *      responses:
+ *        200:
+ *          description: Selected item successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Permissions"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    const payload = await PermissionsDBApi.findBy({ id: req.params.id });
+
+    res.status(200).send(payload);
+  }),
+);
+
+router.use('/', require('../helpers').commonErrorHandler);
+
+module.exports = router;

backend/src/routes/pexels.js

@@ -0,0 +1,106 @@
+const express = require('express');
+const router = express.Router();
+const { pexelsKey, pexelsQuery } = require('../config');
+const fetch = require('node-fetch');
+
+const KEY = pexelsKey;
+
+router.get('/image', async (req, res) => {
+  const headers = {
+    Authorization: `${KEY}`,
+  };
+  const query = pexelsQuery || 'nature';
+  const orientation = 'portrait';
+  const perPage = 1;
+  const url = `https://api.pexels.com/v1/search?query=${query}&orientation=${orientation}&per_page=${perPage}&page=1`;
+
+  try {
+    const response = await fetch(url, { headers });
+    const data = await response.json();
+    res.status(200).json(data.photos[0]);
+  } catch (error) {
+    res.status(500).json({ error: 'Failed to fetch image' });
+  }
+});
+
+router.get('/video', async (req, res) => {
+  const headers = {
+    Authorization: `${KEY}`,
+  };
+  const query = pexelsQuery || 'nature';
+  const orientation = 'portrait';
+  const perPage = 1;
+  const url = `https://api.pexels.com/videos/search?query=${query}&orientation=${orientation}&per_page=${perPage}&page=1`;
+
+  try {
+    const response = await fetch(url, { headers });
+    const data = await response.json();
+    res.status(200).json(data.videos[0]);
+  } catch (error) {
+    res.status(500).json({ error: 'Failed to fetch video' });
+  }
+});
+
+router.get('/multiple-images', async (req, res) => {
+  const headers = {
+    Authorization: `${KEY}`,
+  };
+
+  const queries = req.query.queries
+    ? req.query.queries.split(',')
+    : ['home', 'apple', 'pizza', 'mountains', 'cat'];
+  const orientation = 'square';
+  const perPage = 1;
+
+  const fallbackImage = {
+    src: 'https://images.pexels.com/photos/8199252/pexels-photo-8199252.jpeg',
+    photographer: 'Yan Krukau',
+    photographer_url: 'https://www.pexels.com/@yankrukov',
+  };
+  const fetchFallbackImage = async () => {
+    try {
+      const response = await fetch('https://picsum.photos/600');
+      return {
+        src: response.url,
+        photographer: 'Random Picsum',
+        photographer_url: 'https://picsum.photos/',
+      };
+    } catch (error) {
+      return fallbackImage;
+    }
+  };
+  const fetchImage = async (query) => {
+    const url = `https://api.pexels.com/v1/search?query=${query}&orientation=${orientation}&per_page=${perPage}&page=1`;
+    const response = await fetch(url, { headers });
+    const data = await response.json();
+    return data.photos[0] || null;
+  };
+
+  const imagePromises = queries.map((query) => fetchImage(query));
+  const imagesResults = await Promise.allSettled(imagePromises);
+
+  const formattedImages = await Promise.all(
+    imagesResults.map(async (result) => {
+      if (result.status === 'fulfilled' && result.value) {
+        const image = result.value;
+        return {
+          src: image.src?.original || fallbackImage.src,
+          photographer: image.photographer || fallbackImage.photographer,
+          photographer_url:
+            image.photographer_url || fallbackImage.photographer_url,
+        };
+      } else {
+        const fallback = await fetchFallbackImage();
+        return {
+          src: fallback.src || '',
+          photographer: fallback.photographer || 'Unknown',
+          photographer_url: fallback.photographer_url || '',
+        };
+      }
+    }),
+  );
+
+  res.json(formattedImages);
+});
+
+module.exports = router;

backend/src/routes/questions.js

@@ -0,0 +1,439 @@
+const express = require('express');
+
+const QuestionsService = require('../services/questions');
+const QuestionsDBApi = require('../db/api/questions');
+const wrapAsync = require('../helpers').wrapAsync;
+
+const router = express.Router();
+
+const { parse } = require('json2csv');
+
+const { checkCrudPermissions } = require('../middlewares/check-permissions');
+
+router.use(checkCrudPermissions('questions'));
+
+/**
+ *  @swagger
+ *  components:
+ *    schemas:
+ *      Questions:
+ *        type: object
+ *        properties:
+
+ *          content:
+ *            type: string
+ *            default: content
+
+ *          
+ */
+
+/**
+ *  @swagger
+ * tags:
+ *   name: Questions
+ *   description: The Questions managing API
+ */
+
+/**
+ *  @swagger
+ *  /api/questions:
+ *    post:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Questions]
+ *      summary: Add new item
+ *      description: Add new item
+ *      requestBody:
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                data:
+ *                  description: Data of the updated item
+ *                  type: object
+ *                  $ref: "#/components/schemas/Questions"
+ *      responses:
+ *        200:
+ *          description: The item was successfully added
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Questions"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        405:
+ *          description: Invalid input data
+ *        500:
+ *          description: Some server error
+ */
+router.post(
+  '/',
+  wrapAsync(async (req, res) => {
+    const referer =
+      req.headers.referer ||
+      `${req.protocol}://${req.hostname}${req.originalUrl}`;
+    const link = new URL(referer);
+    await QuestionsService.create(
+      req.body.data,
+      req.currentUser,
+      true,
+      link.host,
+    );
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ * @swagger
+ * /api/budgets/bulk-import:
+ *  post:
+ *    security:
+ *      - bearerAuth: []
+ *    tags: [Questions]
+ *    summary: Bulk import items
+ *    description: Bulk import items
+ *    requestBody:
+ *      required: true
+ *      content:
+ *        application/json:
+ *         schema:
+ *          properties:
+ *            data:
+ *              description: Data of the updated items
+ *              type: array
+ *              items:
+ *                $ref: "#/components/schemas/Questions"
+ *    responses:
+ *      200:
+ *        description: The items were successfully imported
+ *    content:
+ *      application/json:
+ *        schema:
+ *          $ref: "#/components/schemas/Questions"
+ *      401:
+ *        $ref: "#/components/responses/UnauthorizedError"
+ *      405:
+ *        description: Invalid input data
+ *      500:
+ *        description: Some server error
+ *
+ */
+router.post(
+  '/bulk-import',
+  wrapAsync(async (req, res) => {
+    const referer =
+      req.headers.referer ||
+      `${req.protocol}://${req.hostname}${req.originalUrl}`;
+    const link = new URL(referer);
+    await QuestionsService.bulkImport(req, res, true, link.host);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/questions/{id}:
+ *    put:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Questions]
+ *      summary: Update the data of the selected item
+ *      description: Update the data of the selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: Item ID to update
+ *          required: true
+ *          schema:
+ *            type: string
+ *      requestBody:
+ *        description: Set new item data
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                id:
+ *                  description: ID of the updated item
+ *                  type: string
+ *                data:
+ *                  description: Data of the updated item
+ *                  type: object
+ *                  $ref: "#/components/schemas/Questions"
+ *              required:
+ *                - id
+ *      responses:
+ *        200:
+ *          description: The item data was successfully updated
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Questions"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.put(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    await QuestionsService.update(req.body.data, req.body.id, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ * @swagger
+ *  /api/questions/{id}:
+ *    delete:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Questions]
+ *      summary: Delete the selected item
+ *      description: Delete the selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: Item ID to delete
+ *          required: true
+ *          schema:
+ *            type: string
+ *      responses:
+ *        200:
+ *          description: The item was successfully deleted
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Questions"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.delete(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    await QuestionsService.remove(req.params.id, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/questions/deleteByIds:
+ *    post:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Questions]
+ *      summary: Delete the selected item list
+ *      description: Delete the selected item list
+ *      requestBody:
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                ids:
+ *                  description: IDs of the updated items
+ *                  type: array
+ *      responses:
+ *        200:
+ *          description: The items was successfully deleted
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Questions"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Items not found
+ *        500:
+ *          description: Some server error
+ */
+router.post(
+  '/deleteByIds',
+  wrapAsync(async (req, res) => {
+    await QuestionsService.deleteByIds(req.body.data, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/questions:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Questions]
+ *      summary: Get all questions
+ *      description: Get all questions
+ *      responses:
+ *        200:
+ *          description: Questions list successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Questions"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/',
+  wrapAsync(async (req, res) => {
+    const filetype = req.query.filetype;
+
+    const currentUser = req.currentUser;
+    const payload = await QuestionsDBApi.findAll(req.query, { currentUser });
+    if (filetype && filetype === 'csv') {
+      const fields = ['id', 'content'];
+      const opts = { fields };
+      try {
+        const csv = parse(payload.rows, opts);
+        res.status(200).attachment(csv);
+        res.send(csv);
+      } catch (err) {
+        console.error(err);
+      }
+    } else {
+      res.status(200).send(payload);
+    }
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/questions/count:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Questions]
+ *      summary: Count all questions
+ *      description: Count all questions
+ *      responses:
+ *        200:
+ *          description: Questions count successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Questions"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/count',
+  wrapAsync(async (req, res) => {
+    const currentUser = req.currentUser;
+    const payload = await QuestionsDBApi.findAll(req.query, null, {
+      countOnly: true,
+      currentUser,
+    });
+
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/questions/autocomplete:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Questions]
+ *      summary: Find all questions that match search criteria
+ *      description: Find all questions that match search criteria
+ *      responses:
+ *        200:
+ *          description: Questions list successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Questions"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get('/autocomplete', async (req, res) => {
+  const payload = await QuestionsDBApi.findAllAutocomplete(
+    req.query.query,
+    req.query.limit,
+    req.query.offset,
+  );
+
+  res.status(200).send(payload);
+});
+
+/**
+ * @swagger
+ *  /api/questions/{id}:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Questions]
+ *      summary: Get selected item
+ *      description: Get selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: ID of item to get
+ *          required: true
+ *          schema:
+ *            type: string
+ *      responses:
+ *        200:
+ *          description: Selected item successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Questions"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    const payload = await QuestionsDBApi.findBy({ id: req.params.id });
+
+    res.status(200).send(payload);
+  }),
+);
+
+router.use('/', require('../helpers').commonErrorHandler);
+
+module.exports = router;

backend/src/routes/quizzes.js

@@ -0,0 +1,438 @@
+const express = require('express');
+
+const QuizzesService = require('../services/quizzes');
+const QuizzesDBApi = require('../db/api/quizzes');
+const wrapAsync = require('../helpers').wrapAsync;
+
+const router = express.Router();
+
+const { parse } = require('json2csv');
+
+const { checkCrudPermissions } = require('../middlewares/check-permissions');
+
+router.use(checkCrudPermissions('quizzes'));
+
+/**
+ *  @swagger
+ *  components:
+ *    schemas:
+ *      Quizzes:
+ *        type: object
+ *        properties:
+
+ *          title:
+ *            type: string
+ *            default: title
+
+ */
+
+/**
+ *  @swagger
+ * tags:
+ *   name: Quizzes
+ *   description: The Quizzes managing API
+ */
+
+/**
+ *  @swagger
+ *  /api/quizzes:
+ *    post:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Quizzes]
+ *      summary: Add new item
+ *      description: Add new item
+ *      requestBody:
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                data:
+ *                  description: Data of the updated item
+ *                  type: object
+ *                  $ref: "#/components/schemas/Quizzes"
+ *      responses:
+ *        200:
+ *          description: The item was successfully added
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Quizzes"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        405:
+ *          description: Invalid input data
+ *        500:
+ *          description: Some server error
+ */
+router.post(
+  '/',
+  wrapAsync(async (req, res) => {
+    const referer =
+      req.headers.referer ||
+      `${req.protocol}://${req.hostname}${req.originalUrl}`;
+    const link = new URL(referer);
+    await QuizzesService.create(
+      req.body.data,
+      req.currentUser,
+      true,
+      link.host,
+    );
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ * @swagger
+ * /api/budgets/bulk-import:
+ *  post:
+ *    security:
+ *      - bearerAuth: []
+ *    tags: [Quizzes]
+ *    summary: Bulk import items
+ *    description: Bulk import items
+ *    requestBody:
+ *      required: true
+ *      content:
+ *        application/json:
+ *         schema:
+ *          properties:
+ *            data:
+ *              description: Data of the updated items
+ *              type: array
+ *              items:
+ *                $ref: "#/components/schemas/Quizzes"
+ *    responses:
+ *      200:
+ *        description: The items were successfully imported
+ *    content:
+ *      application/json:
+ *        schema:
+ *          $ref: "#/components/schemas/Quizzes"
+ *      401:
+ *        $ref: "#/components/responses/UnauthorizedError"
+ *      405:
+ *        description: Invalid input data
+ *      500:
+ *        description: Some server error
+ *
+ */
+router.post(
+  '/bulk-import',
+  wrapAsync(async (req, res) => {
+    const referer =
+      req.headers.referer ||
+      `${req.protocol}://${req.hostname}${req.originalUrl}`;
+    const link = new URL(referer);
+    await QuizzesService.bulkImport(req, res, true, link.host);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/quizzes/{id}:
+ *    put:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Quizzes]
+ *      summary: Update the data of the selected item
+ *      description: Update the data of the selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: Item ID to update
+ *          required: true
+ *          schema:
+ *            type: string
+ *      requestBody:
+ *        description: Set new item data
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                id:
+ *                  description: ID of the updated item
+ *                  type: string
+ *                data:
+ *                  description: Data of the updated item
+ *                  type: object
+ *                  $ref: "#/components/schemas/Quizzes"
+ *              required:
+ *                - id
+ *      responses:
+ *        200:
+ *          description: The item data was successfully updated
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Quizzes"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.put(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    await QuizzesService.update(req.body.data, req.body.id, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ * @swagger
+ *  /api/quizzes/{id}:
+ *    delete:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Quizzes]
+ *      summary: Delete the selected item
+ *      description: Delete the selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: Item ID to delete
+ *          required: true
+ *          schema:
+ *            type: string
+ *      responses:
+ *        200:
+ *          description: The item was successfully deleted
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Quizzes"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.delete(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    await QuizzesService.remove(req.params.id, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/quizzes/deleteByIds:
+ *    post:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Quizzes]
+ *      summary: Delete the selected item list
+ *      description: Delete the selected item list
+ *      requestBody:
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                ids:
+ *                  description: IDs of the updated items
+ *                  type: array
+ *      responses:
+ *        200:
+ *          description: The items was successfully deleted
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Quizzes"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Items not found
+ *        500:
+ *          description: Some server error
+ */
+router.post(
+  '/deleteByIds',
+  wrapAsync(async (req, res) => {
+    await QuizzesService.deleteByIds(req.body.data, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/quizzes:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Quizzes]
+ *      summary: Get all quizzes
+ *      description: Get all quizzes
+ *      responses:
+ *        200:
+ *          description: Quizzes list successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Quizzes"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/',
+  wrapAsync(async (req, res) => {
+    const filetype = req.query.filetype;
+
+    const currentUser = req.currentUser;
+    const payload = await QuizzesDBApi.findAll(req.query, { currentUser });
+    if (filetype && filetype === 'csv') {
+      const fields = ['id', 'title'];
+      const opts = { fields };
+      try {
+        const csv = parse(payload.rows, opts);
+        res.status(200).attachment(csv);
+        res.send(csv);
+      } catch (err) {
+        console.error(err);
+      }
+    } else {
+      res.status(200).send(payload);
+    }
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/quizzes/count:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Quizzes]
+ *      summary: Count all quizzes
+ *      description: Count all quizzes
+ *      responses:
+ *        200:
+ *          description: Quizzes count successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Quizzes"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/count',
+  wrapAsync(async (req, res) => {
+    const currentUser = req.currentUser;
+    const payload = await QuizzesDBApi.findAll(req.query, null, {
+      countOnly: true,
+      currentUser,
+    });
+
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/quizzes/autocomplete:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Quizzes]
+ *      summary: Find all quizzes that match search criteria
+ *      description: Find all quizzes that match search criteria
+ *      responses:
+ *        200:
+ *          description: Quizzes list successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Quizzes"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get('/autocomplete', async (req, res) => {
+  const payload = await QuizzesDBApi.findAllAutocomplete(
+    req.query.query,
+    req.query.limit,
+    req.query.offset,
+  );
+
+  res.status(200).send(payload);
+});
+
+/**
+ * @swagger
+ *  /api/quizzes/{id}:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Quizzes]
+ *      summary: Get selected item
+ *      description: Get selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: ID of item to get
+ *          required: true
+ *          schema:
+ *            type: string
+ *      responses:
+ *        200:
+ *          description: Selected item successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Quizzes"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    const payload = await QuizzesDBApi.findBy({ id: req.params.id });
+
+    res.status(200).send(payload);
+  }),
+);
+
+router.use('/', require('../helpers').commonErrorHandler);
+
+module.exports = router;

backend/src/routes/roles.js

@@ -0,0 +1,433 @@
+const express = require('express');
+
+const RolesService = require('../services/roles');
+const RolesDBApi = require('../db/api/roles');
+const wrapAsync = require('../helpers').wrapAsync;
+
+const router = express.Router();
+
+const { parse } = require('json2csv');
+
+const { checkCrudPermissions } = require('../middlewares/check-permissions');
+
+router.use(checkCrudPermissions('roles'));
+
+/**
+ *  @swagger
+ *  components:
+ *    schemas:
+ *      Roles:
+ *        type: object
+ *        properties:
+
+ *          name:
+ *            type: string
+ *            default: name
+
+ */
+
+/**
+ *  @swagger
+ * tags:
+ *   name: Roles
+ *   description: The Roles managing API
+ */
+
+/**
+ *  @swagger
+ *  /api/roles:
+ *    post:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Roles]
+ *      summary: Add new item
+ *      description: Add new item
+ *      requestBody:
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                data:
+ *                  description: Data of the updated item
+ *                  type: object
+ *                  $ref: "#/components/schemas/Roles"
+ *      responses:
+ *        200:
+ *          description: The item was successfully added
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Roles"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        405:
+ *          description: Invalid input data
+ *        500:
+ *          description: Some server error
+ */
+router.post(
+  '/',
+  wrapAsync(async (req, res) => {
+    const referer =
+      req.headers.referer ||
+      `${req.protocol}://${req.hostname}${req.originalUrl}`;
+    const link = new URL(referer);
+    await RolesService.create(req.body.data, req.currentUser, true, link.host);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ * @swagger
+ * /api/budgets/bulk-import:
+ *  post:
+ *    security:
+ *      - bearerAuth: []
+ *    tags: [Roles]
+ *    summary: Bulk import items
+ *    description: Bulk import items
+ *    requestBody:
+ *      required: true
+ *      content:
+ *        application/json:
+ *         schema:
+ *          properties:
+ *            data:
+ *              description: Data of the updated items
+ *              type: array
+ *              items:
+ *                $ref: "#/components/schemas/Roles"
+ *    responses:
+ *      200:
+ *        description: The items were successfully imported
+ *    content:
+ *      application/json:
+ *        schema:
+ *          $ref: "#/components/schemas/Roles"
+ *      401:
+ *        $ref: "#/components/responses/UnauthorizedError"
+ *      405:
+ *        description: Invalid input data
+ *      500:
+ *        description: Some server error
+ *
+ */
+router.post(
+  '/bulk-import',
+  wrapAsync(async (req, res) => {
+    const referer =
+      req.headers.referer ||
+      `${req.protocol}://${req.hostname}${req.originalUrl}`;
+    const link = new URL(referer);
+    await RolesService.bulkImport(req, res, true, link.host);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/roles/{id}:
+ *    put:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Roles]
+ *      summary: Update the data of the selected item
+ *      description: Update the data of the selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: Item ID to update
+ *          required: true
+ *          schema:
+ *            type: string
+ *      requestBody:
+ *        description: Set new item data
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                id:
+ *                  description: ID of the updated item
+ *                  type: string
+ *                data:
+ *                  description: Data of the updated item
+ *                  type: object
+ *                  $ref: "#/components/schemas/Roles"
+ *              required:
+ *                - id
+ *      responses:
+ *        200:
+ *          description: The item data was successfully updated
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Roles"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.put(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    await RolesService.update(req.body.data, req.body.id, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ * @swagger
+ *  /api/roles/{id}:
+ *    delete:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Roles]
+ *      summary: Delete the selected item
+ *      description: Delete the selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: Item ID to delete
+ *          required: true
+ *          schema:
+ *            type: string
+ *      responses:
+ *        200:
+ *          description: The item was successfully deleted
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Roles"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.delete(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    await RolesService.remove(req.params.id, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/roles/deleteByIds:
+ *    post:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Roles]
+ *      summary: Delete the selected item list
+ *      description: Delete the selected item list
+ *      requestBody:
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                ids:
+ *                  description: IDs of the updated items
+ *                  type: array
+ *      responses:
+ *        200:
+ *          description: The items was successfully deleted
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Roles"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Items not found
+ *        500:
+ *          description: Some server error
+ */
+router.post(
+  '/deleteByIds',
+  wrapAsync(async (req, res) => {
+    await RolesService.deleteByIds(req.body.data, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/roles:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Roles]
+ *      summary: Get all roles
+ *      description: Get all roles
+ *      responses:
+ *        200:
+ *          description: Roles list successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Roles"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/',
+  wrapAsync(async (req, res) => {
+    const filetype = req.query.filetype;
+
+    const currentUser = req.currentUser;
+    const payload = await RolesDBApi.findAll(req.query, { currentUser });
+    if (filetype && filetype === 'csv') {
+      const fields = ['id', 'name'];
+      const opts = { fields };
+      try {
+        const csv = parse(payload.rows, opts);
+        res.status(200).attachment(csv);
+        res.send(csv);
+      } catch (err) {
+        console.error(err);
+      }
+    } else {
+      res.status(200).send(payload);
+    }
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/roles/count:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Roles]
+ *      summary: Count all roles
+ *      description: Count all roles
+ *      responses:
+ *        200:
+ *          description: Roles count successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Roles"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/count',
+  wrapAsync(async (req, res) => {
+    const currentUser = req.currentUser;
+    const payload = await RolesDBApi.findAll(req.query, null, {
+      countOnly: true,
+      currentUser,
+    });
+
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/roles/autocomplete:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Roles]
+ *      summary: Find all roles that match search criteria
+ *      description: Find all roles that match search criteria
+ *      responses:
+ *        200:
+ *          description: Roles list successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Roles"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get('/autocomplete', async (req, res) => {
+  const payload = await RolesDBApi.findAllAutocomplete(
+    req.query.query,
+    req.query.limit,
+    req.query.offset,
+  );
+
+  res.status(200).send(payload);
+});
+
+/**
+ * @swagger
+ *  /api/roles/{id}:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Roles]
+ *      summary: Get selected item
+ *      description: Get selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: ID of item to get
+ *          required: true
+ *          schema:
+ *            type: string
+ *      responses:
+ *        200:
+ *          description: Selected item successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Roles"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    const payload = await RolesDBApi.findBy({ id: req.params.id });
+
+    res.status(200).send(payload);
+  }),
+);
+
+router.use('/', require('../helpers').commonErrorHandler);
+
+module.exports = router;

backend/src/routes/search.js

@@ -0,0 +1,54 @@
+const express = require('express');
+const SearchService = require('../services/search');
+
+const router = express.Router();
+
+const { checkCrudPermissions } = require('../middlewares/check-permissions');
+router.use(checkCrudPermissions('search'));
+
+/**
+ * @swagger
+ * path:
+ *  /api/search:
+ *    post:
+ *      summary: Search
+ *      description: Search results across multiple tables
+ *      requestBody:
+ *        content:
+ *          application/json:
+ *            schema:
+ *              type: object
+ *              properties:
+ *                searchQuery:
+ *                  type: string
+ *              required:
+ *                - searchQuery
+ *      responses:
+ *        200:
+ *          description: Successful request
+ *        400:
+ *          description: Invalid request
+ *        500:
+ *          description: Internal server error
+ */
+
+router.post('/', async (req, res) => {
+  const { searchQuery } = req.body;
+
+  if (!searchQuery) {
+    return res.status(400).json({ error: 'Please enter a search query' });
+  }
+
+  try {
+    const foundMatches = await SearchService.search(
+      searchQuery,
+      req.currentUser,
+    );
+    res.json(foundMatches);
+  } catch (error) {
+    console.error('Internal Server Error', error);
+    res.status(500).json({ error: 'Internal Server Error' });
+  }
+});
+
+module.exports = router;

backend/src/routes/students.js

@@ -0,0 +1,438 @@
+const express = require('express');
+
+const StudentsService = require('../services/students');
+const StudentsDBApi = require('../db/api/students');
+const wrapAsync = require('../helpers').wrapAsync;
+
+const router = express.Router();
+
+const { parse } = require('json2csv');
+
+const { checkCrudPermissions } = require('../middlewares/check-permissions');
+
+router.use(checkCrudPermissions('students'));
+
+/**
+ *  @swagger
+ *  components:
+ *    schemas:
+ *      Students:
+ *        type: object
+ *        properties:
+
+ *          name:
+ *            type: string
+ *            default: name
+
+ */
+
+/**
+ *  @swagger
+ * tags:
+ *   name: Students
+ *   description: The Students managing API
+ */
+
+/**
+ *  @swagger
+ *  /api/students:
+ *    post:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Students]
+ *      summary: Add new item
+ *      description: Add new item
+ *      requestBody:
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                data:
+ *                  description: Data of the updated item
+ *                  type: object
+ *                  $ref: "#/components/schemas/Students"
+ *      responses:
+ *        200:
+ *          description: The item was successfully added
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Students"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        405:
+ *          description: Invalid input data
+ *        500:
+ *          description: Some server error
+ */
+router.post(
+  '/',
+  wrapAsync(async (req, res) => {
+    const referer =
+      req.headers.referer ||
+      `${req.protocol}://${req.hostname}${req.originalUrl}`;
+    const link = new URL(referer);
+    await StudentsService.create(
+      req.body.data,
+      req.currentUser,
+      true,
+      link.host,
+    );
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ * @swagger
+ * /api/budgets/bulk-import:
+ *  post:
+ *    security:
+ *      - bearerAuth: []
+ *    tags: [Students]
+ *    summary: Bulk import items
+ *    description: Bulk import items
+ *    requestBody:
+ *      required: true
+ *      content:
+ *        application/json:
+ *         schema:
+ *          properties:
+ *            data:
+ *              description: Data of the updated items
+ *              type: array
+ *              items:
+ *                $ref: "#/components/schemas/Students"
+ *    responses:
+ *      200:
+ *        description: The items were successfully imported
+ *    content:
+ *      application/json:
+ *        schema:
+ *          $ref: "#/components/schemas/Students"
+ *      401:
+ *        $ref: "#/components/responses/UnauthorizedError"
+ *      405:
+ *        description: Invalid input data
+ *      500:
+ *        description: Some server error
+ *
+ */
+router.post(
+  '/bulk-import',
+  wrapAsync(async (req, res) => {
+    const referer =
+      req.headers.referer ||
+      `${req.protocol}://${req.hostname}${req.originalUrl}`;
+    const link = new URL(referer);
+    await StudentsService.bulkImport(req, res, true, link.host);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/students/{id}:
+ *    put:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Students]
+ *      summary: Update the data of the selected item
+ *      description: Update the data of the selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: Item ID to update
+ *          required: true
+ *          schema:
+ *            type: string
+ *      requestBody:
+ *        description: Set new item data
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                id:
+ *                  description: ID of the updated item
+ *                  type: string
+ *                data:
+ *                  description: Data of the updated item
+ *                  type: object
+ *                  $ref: "#/components/schemas/Students"
+ *              required:
+ *                - id
+ *      responses:
+ *        200:
+ *          description: The item data was successfully updated
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Students"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.put(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    await StudentsService.update(req.body.data, req.body.id, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ * @swagger
+ *  /api/students/{id}:
+ *    delete:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Students]
+ *      summary: Delete the selected item
+ *      description: Delete the selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: Item ID to delete
+ *          required: true
+ *          schema:
+ *            type: string
+ *      responses:
+ *        200:
+ *          description: The item was successfully deleted
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Students"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.delete(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    await StudentsService.remove(req.params.id, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/students/deleteByIds:
+ *    post:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Students]
+ *      summary: Delete the selected item list
+ *      description: Delete the selected item list
+ *      requestBody:
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                ids:
+ *                  description: IDs of the updated items
+ *                  type: array
+ *      responses:
+ *        200:
+ *          description: The items was successfully deleted
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Students"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Items not found
+ *        500:
+ *          description: Some server error
+ */
+router.post(
+  '/deleteByIds',
+  wrapAsync(async (req, res) => {
+    await StudentsService.deleteByIds(req.body.data, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/students:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Students]
+ *      summary: Get all students
+ *      description: Get all students
+ *      responses:
+ *        200:
+ *          description: Students list successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Students"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/',
+  wrapAsync(async (req, res) => {
+    const filetype = req.query.filetype;
+
+    const currentUser = req.currentUser;
+    const payload = await StudentsDBApi.findAll(req.query, { currentUser });
+    if (filetype && filetype === 'csv') {
+      const fields = ['id', 'name'];
+      const opts = { fields };
+      try {
+        const csv = parse(payload.rows, opts);
+        res.status(200).attachment(csv);
+        res.send(csv);
+      } catch (err) {
+        console.error(err);
+      }
+    } else {
+      res.status(200).send(payload);
+    }
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/students/count:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Students]
+ *      summary: Count all students
+ *      description: Count all students
+ *      responses:
+ *        200:
+ *          description: Students count successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Students"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/count',
+  wrapAsync(async (req, res) => {
+    const currentUser = req.currentUser;
+    const payload = await StudentsDBApi.findAll(req.query, null, {
+      countOnly: true,
+      currentUser,
+    });
+
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/students/autocomplete:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Students]
+ *      summary: Find all students that match search criteria
+ *      description: Find all students that match search criteria
+ *      responses:
+ *        200:
+ *          description: Students list successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Students"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get('/autocomplete', async (req, res) => {
+  const payload = await StudentsDBApi.findAllAutocomplete(
+    req.query.query,
+    req.query.limit,
+    req.query.offset,
+  );
+
+  res.status(200).send(payload);
+});
+
+/**
+ * @swagger
+ *  /api/students/{id}:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Students]
+ *      summary: Get selected item
+ *      description: Get selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: ID of item to get
+ *          required: true
+ *          schema:
+ *            type: string
+ *      responses:
+ *        200:
+ *          description: Selected item successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Students"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    const payload = await StudentsDBApi.findBy({ id: req.params.id });
+
+    res.status(200).send(payload);
+  }),
+);
+
+router.use('/', require('../helpers').commonErrorHandler);
+
+module.exports = router;

backend/src/routes/tasks.js

@@ -0,0 +1,433 @@
+const express = require('express');
+
+const TasksService = require('../services/tasks');
+const TasksDBApi = require('../db/api/tasks');
+const wrapAsync = require('../helpers').wrapAsync;
+
+const router = express.Router();
+
+const { parse } = require('json2csv');
+
+const { checkCrudPermissions } = require('../middlewares/check-permissions');
+
+router.use(checkCrudPermissions('tasks'));
+
+/**
+ *  @swagger
+ *  components:
+ *    schemas:
+ *      Tasks:
+ *        type: object
+ *        properties:
+
+ *          title:
+ *            type: string
+ *            default: title
+
+ */
+
+/**
+ *  @swagger
+ * tags:
+ *   name: Tasks
+ *   description: The Tasks managing API
+ */
+
+/**
+ *  @swagger
+ *  /api/tasks:
+ *    post:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Tasks]
+ *      summary: Add new item
+ *      description: Add new item
+ *      requestBody:
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                data:
+ *                  description: Data of the updated item
+ *                  type: object
+ *                  $ref: "#/components/schemas/Tasks"
+ *      responses:
+ *        200:
+ *          description: The item was successfully added
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Tasks"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        405:
+ *          description: Invalid input data
+ *        500:
+ *          description: Some server error
+ */
+router.post(
+  '/',
+  wrapAsync(async (req, res) => {
+    const referer =
+      req.headers.referer ||
+      `${req.protocol}://${req.hostname}${req.originalUrl}`;
+    const link = new URL(referer);
+    await TasksService.create(req.body.data, req.currentUser, true, link.host);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ * @swagger
+ * /api/budgets/bulk-import:
+ *  post:
+ *    security:
+ *      - bearerAuth: []
+ *    tags: [Tasks]
+ *    summary: Bulk import items
+ *    description: Bulk import items
+ *    requestBody:
+ *      required: true
+ *      content:
+ *        application/json:
+ *         schema:
+ *          properties:
+ *            data:
+ *              description: Data of the updated items
+ *              type: array
+ *              items:
+ *                $ref: "#/components/schemas/Tasks"
+ *    responses:
+ *      200:
+ *        description: The items were successfully imported
+ *    content:
+ *      application/json:
+ *        schema:
+ *          $ref: "#/components/schemas/Tasks"
+ *      401:
+ *        $ref: "#/components/responses/UnauthorizedError"
+ *      405:
+ *        description: Invalid input data
+ *      500:
+ *        description: Some server error
+ *
+ */
+router.post(
+  '/bulk-import',
+  wrapAsync(async (req, res) => {
+    const referer =
+      req.headers.referer ||
+      `${req.protocol}://${req.hostname}${req.originalUrl}`;
+    const link = new URL(referer);
+    await TasksService.bulkImport(req, res, true, link.host);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/tasks/{id}:
+ *    put:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Tasks]
+ *      summary: Update the data of the selected item
+ *      description: Update the data of the selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: Item ID to update
+ *          required: true
+ *          schema:
+ *            type: string
+ *      requestBody:
+ *        description: Set new item data
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                id:
+ *                  description: ID of the updated item
+ *                  type: string
+ *                data:
+ *                  description: Data of the updated item
+ *                  type: object
+ *                  $ref: "#/components/schemas/Tasks"
+ *              required:
+ *                - id
+ *      responses:
+ *        200:
+ *          description: The item data was successfully updated
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Tasks"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.put(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    await TasksService.update(req.body.data, req.body.id, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ * @swagger
+ *  /api/tasks/{id}:
+ *    delete:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Tasks]
+ *      summary: Delete the selected item
+ *      description: Delete the selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: Item ID to delete
+ *          required: true
+ *          schema:
+ *            type: string
+ *      responses:
+ *        200:
+ *          description: The item was successfully deleted
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Tasks"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.delete(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    await TasksService.remove(req.params.id, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/tasks/deleteByIds:
+ *    post:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Tasks]
+ *      summary: Delete the selected item list
+ *      description: Delete the selected item list
+ *      requestBody:
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                ids:
+ *                  description: IDs of the updated items
+ *                  type: array
+ *      responses:
+ *        200:
+ *          description: The items was successfully deleted
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Tasks"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Items not found
+ *        500:
+ *          description: Some server error
+ */
+router.post(
+  '/deleteByIds',
+  wrapAsync(async (req, res) => {
+    await TasksService.deleteByIds(req.body.data, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/tasks:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Tasks]
+ *      summary: Get all tasks
+ *      description: Get all tasks
+ *      responses:
+ *        200:
+ *          description: Tasks list successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Tasks"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/',
+  wrapAsync(async (req, res) => {
+    const filetype = req.query.filetype;
+
+    const currentUser = req.currentUser;
+    const payload = await TasksDBApi.findAll(req.query, { currentUser });
+    if (filetype && filetype === 'csv') {
+      const fields = ['id', 'title', 'due_date'];
+      const opts = { fields };
+      try {
+        const csv = parse(payload.rows, opts);
+        res.status(200).attachment(csv);
+        res.send(csv);
+      } catch (err) {
+        console.error(err);
+      }
+    } else {
+      res.status(200).send(payload);
+    }
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/tasks/count:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Tasks]
+ *      summary: Count all tasks
+ *      description: Count all tasks
+ *      responses:
+ *        200:
+ *          description: Tasks count successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Tasks"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/count',
+  wrapAsync(async (req, res) => {
+    const currentUser = req.currentUser;
+    const payload = await TasksDBApi.findAll(req.query, null, {
+      countOnly: true,
+      currentUser,
+    });
+
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/tasks/autocomplete:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Tasks]
+ *      summary: Find all tasks that match search criteria
+ *      description: Find all tasks that match search criteria
+ *      responses:
+ *        200:
+ *          description: Tasks list successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Tasks"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get('/autocomplete', async (req, res) => {
+  const payload = await TasksDBApi.findAllAutocomplete(
+    req.query.query,
+    req.query.limit,
+    req.query.offset,
+  );
+
+  res.status(200).send(payload);
+});
+
+/**
+ * @swagger
+ *  /api/tasks/{id}:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Tasks]
+ *      summary: Get selected item
+ *      description: Get selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: ID of item to get
+ *          required: true
+ *          schema:
+ *            type: string
+ *      responses:
+ *        200:
+ *          description: Selected item successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Tasks"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    const payload = await TasksDBApi.findBy({ id: req.params.id });
+
+    res.status(200).send(payload);
+  }),
+);
+
+router.use('/', require('../helpers').commonErrorHandler);
+
+module.exports = router;

backend/src/routes/teachers.js

@@ -0,0 +1,438 @@
+const express = require('express');
+
+const TeachersService = require('../services/teachers');
+const TeachersDBApi = require('../db/api/teachers');
+const wrapAsync = require('../helpers').wrapAsync;
+
+const router = express.Router();
+
+const { parse } = require('json2csv');
+
+const { checkCrudPermissions } = require('../middlewares/check-permissions');
+
+router.use(checkCrudPermissions('teachers'));
+
+/**
+ *  @swagger
+ *  components:
+ *    schemas:
+ *      Teachers:
+ *        type: object
+ *        properties:
+
+ *          name:
+ *            type: string
+ *            default: name
+
+ */
+
+/**
+ *  @swagger
+ * tags:
+ *   name: Teachers
+ *   description: The Teachers managing API
+ */
+
+/**
+ *  @swagger
+ *  /api/teachers:
+ *    post:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Teachers]
+ *      summary: Add new item
+ *      description: Add new item
+ *      requestBody:
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                data:
+ *                  description: Data of the updated item
+ *                  type: object
+ *                  $ref: "#/components/schemas/Teachers"
+ *      responses:
+ *        200:
+ *          description: The item was successfully added
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Teachers"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        405:
+ *          description: Invalid input data
+ *        500:
+ *          description: Some server error
+ */
+router.post(
+  '/',
+  wrapAsync(async (req, res) => {
+    const referer =
+      req.headers.referer ||
+      `${req.protocol}://${req.hostname}${req.originalUrl}`;
+    const link = new URL(referer);
+    await TeachersService.create(
+      req.body.data,
+      req.currentUser,
+      true,
+      link.host,
+    );
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ * @swagger
+ * /api/budgets/bulk-import:
+ *  post:
+ *    security:
+ *      - bearerAuth: []
+ *    tags: [Teachers]
+ *    summary: Bulk import items
+ *    description: Bulk import items
+ *    requestBody:
+ *      required: true
+ *      content:
+ *        application/json:
+ *         schema:
+ *          properties:
+ *            data:
+ *              description: Data of the updated items
+ *              type: array
+ *              items:
+ *                $ref: "#/components/schemas/Teachers"
+ *    responses:
+ *      200:
+ *        description: The items were successfully imported
+ *    content:
+ *      application/json:
+ *        schema:
+ *          $ref: "#/components/schemas/Teachers"
+ *      401:
+ *        $ref: "#/components/responses/UnauthorizedError"
+ *      405:
+ *        description: Invalid input data
+ *      500:
+ *        description: Some server error
+ *
+ */
+router.post(
+  '/bulk-import',
+  wrapAsync(async (req, res) => {
+    const referer =
+      req.headers.referer ||
+      `${req.protocol}://${req.hostname}${req.originalUrl}`;
+    const link = new URL(referer);
+    await TeachersService.bulkImport(req, res, true, link.host);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/teachers/{id}:
+ *    put:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Teachers]
+ *      summary: Update the data of the selected item
+ *      description: Update the data of the selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: Item ID to update
+ *          required: true
+ *          schema:
+ *            type: string
+ *      requestBody:
+ *        description: Set new item data
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                id:
+ *                  description: ID of the updated item
+ *                  type: string
+ *                data:
+ *                  description: Data of the updated item
+ *                  type: object
+ *                  $ref: "#/components/schemas/Teachers"
+ *              required:
+ *                - id
+ *      responses:
+ *        200:
+ *          description: The item data was successfully updated
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Teachers"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.put(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    await TeachersService.update(req.body.data, req.body.id, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ * @swagger
+ *  /api/teachers/{id}:
+ *    delete:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Teachers]
+ *      summary: Delete the selected item
+ *      description: Delete the selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: Item ID to delete
+ *          required: true
+ *          schema:
+ *            type: string
+ *      responses:
+ *        200:
+ *          description: The item was successfully deleted
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Teachers"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.delete(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    await TeachersService.remove(req.params.id, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/teachers/deleteByIds:
+ *    post:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Teachers]
+ *      summary: Delete the selected item list
+ *      description: Delete the selected item list
+ *      requestBody:
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                ids:
+ *                  description: IDs of the updated items
+ *                  type: array
+ *      responses:
+ *        200:
+ *          description: The items was successfully deleted
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Teachers"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Items not found
+ *        500:
+ *          description: Some server error
+ */
+router.post(
+  '/deleteByIds',
+  wrapAsync(async (req, res) => {
+    await TeachersService.deleteByIds(req.body.data, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/teachers:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Teachers]
+ *      summary: Get all teachers
+ *      description: Get all teachers
+ *      responses:
+ *        200:
+ *          description: Teachers list successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Teachers"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/',
+  wrapAsync(async (req, res) => {
+    const filetype = req.query.filetype;
+
+    const currentUser = req.currentUser;
+    const payload = await TeachersDBApi.findAll(req.query, { currentUser });
+    if (filetype && filetype === 'csv') {
+      const fields = ['id', 'name'];
+      const opts = { fields };
+      try {
+        const csv = parse(payload.rows, opts);
+        res.status(200).attachment(csv);
+        res.send(csv);
+      } catch (err) {
+        console.error(err);
+      }
+    } else {
+      res.status(200).send(payload);
+    }
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/teachers/count:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Teachers]
+ *      summary: Count all teachers
+ *      description: Count all teachers
+ *      responses:
+ *        200:
+ *          description: Teachers count successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Teachers"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/count',
+  wrapAsync(async (req, res) => {
+    const currentUser = req.currentUser;
+    const payload = await TeachersDBApi.findAll(req.query, null, {
+      countOnly: true,
+      currentUser,
+    });
+
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/teachers/autocomplete:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Teachers]
+ *      summary: Find all teachers that match search criteria
+ *      description: Find all teachers that match search criteria
+ *      responses:
+ *        200:
+ *          description: Teachers list successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Teachers"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get('/autocomplete', async (req, res) => {
+  const payload = await TeachersDBApi.findAllAutocomplete(
+    req.query.query,
+    req.query.limit,
+    req.query.offset,
+  );
+
+  res.status(200).send(payload);
+});
+
+/**
+ * @swagger
+ *  /api/teachers/{id}:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Teachers]
+ *      summary: Get selected item
+ *      description: Get selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: ID of item to get
+ *          required: true
+ *          schema:
+ *            type: string
+ *      responses:
+ *        200:
+ *          description: Selected item successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Teachers"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    const payload = await TeachersDBApi.findBy({ id: req.params.id });
+
+    res.status(200).send(payload);
+  }),
+);
+
+router.use('/', require('../helpers').commonErrorHandler);
+
+module.exports = router;

backend/src/routes/users.js

@@ -0,0 +1,444 @@
+const express = require('express');
+
+const UsersService = require('../services/users');
+const UsersDBApi = require('../db/api/users');
+const wrapAsync = require('../helpers').wrapAsync;
+
+const router = express.Router();
+
+const { parse } = require('json2csv');
+
+const { checkCrudPermissions } = require('../middlewares/check-permissions');
+
+router.use(checkCrudPermissions('users'));
+
+/**
+ *  @swagger
+ *  components:
+ *    schemas:
+ *      Users:
+ *        type: object
+ *        properties:
+
+ *          firstName:
+ *            type: string
+ *            default: firstName
+ *          lastName:
+ *            type: string
+ *            default: lastName
+ *          phoneNumber:
+ *            type: string
+ *            default: phoneNumber
+ *          email:
+ *            type: string
+ *            default: email
+
+ */
+
+/**
+ *  @swagger
+ * tags:
+ *   name: Users
+ *   description: The Users managing API
+ */
+
+/**
+ *  @swagger
+ *  /api/users:
+ *    post:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Users]
+ *      summary: Add new item
+ *      description: Add new item
+ *      requestBody:
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                data:
+ *                  description: Data of the updated item
+ *                  type: object
+ *                  $ref: "#/components/schemas/Users"
+ *      responses:
+ *        200:
+ *          description: The item was successfully added
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Users"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        405:
+ *          description: Invalid input data
+ *        500:
+ *          description: Some server error
+ */
+router.post(
+  '/',
+  wrapAsync(async (req, res) => {
+    const referer =
+      req.headers.referer ||
+      `${req.protocol}://${req.hostname}${req.originalUrl}`;
+    const link = new URL(referer);
+    await UsersService.create(req.body.data, req.currentUser, true, link.host);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ * @swagger
+ * /api/budgets/bulk-import:
+ *  post:
+ *    security:
+ *      - bearerAuth: []
+ *    tags: [Users]
+ *    summary: Bulk import items
+ *    description: Bulk import items
+ *    requestBody:
+ *      required: true
+ *      content:
+ *        application/json:
+ *         schema:
+ *          properties:
+ *            data:
+ *              description: Data of the updated items
+ *              type: array
+ *              items:
+ *                $ref: "#/components/schemas/Users"
+ *    responses:
+ *      200:
+ *        description: The items were successfully imported
+ *    content:
+ *      application/json:
+ *        schema:
+ *          $ref: "#/components/schemas/Users"
+ *      401:
+ *        $ref: "#/components/responses/UnauthorizedError"
+ *      405:
+ *        description: Invalid input data
+ *      500:
+ *        description: Some server error
+ *
+ */
+router.post(
+  '/bulk-import',
+  wrapAsync(async (req, res) => {
+    const referer =
+      req.headers.referer ||
+      `${req.protocol}://${req.hostname}${req.originalUrl}`;
+    const link = new URL(referer);
+    await UsersService.bulkImport(req, res, true, link.host);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/users/{id}:
+ *    put:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Users]
+ *      summary: Update the data of the selected item
+ *      description: Update the data of the selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: Item ID to update
+ *          required: true
+ *          schema:
+ *            type: string
+ *      requestBody:
+ *        description: Set new item data
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                id:
+ *                  description: ID of the updated item
+ *                  type: string
+ *                data:
+ *                  description: Data of the updated item
+ *                  type: object
+ *                  $ref: "#/components/schemas/Users"
+ *              required:
+ *                - id
+ *      responses:
+ *        200:
+ *          description: The item data was successfully updated
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Users"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.put(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    await UsersService.update(req.body.data, req.body.id, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ * @swagger
+ *  /api/users/{id}:
+ *    delete:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Users]
+ *      summary: Delete the selected item
+ *      description: Delete the selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: Item ID to delete
+ *          required: true
+ *          schema:
+ *            type: string
+ *      responses:
+ *        200:
+ *          description: The item was successfully deleted
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Users"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.delete(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    await UsersService.remove(req.params.id, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/users/deleteByIds:
+ *    post:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Users]
+ *      summary: Delete the selected item list
+ *      description: Delete the selected item list
+ *      requestBody:
+ *        required: true
+ *        content:
+ *          application/json:
+ *            schema:
+ *              properties:
+ *                ids:
+ *                  description: IDs of the updated items
+ *                  type: array
+ *      responses:
+ *        200:
+ *          description: The items was successfully deleted
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Users"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Items not found
+ *        500:
+ *          description: Some server error
+ */
+router.post(
+  '/deleteByIds',
+  wrapAsync(async (req, res) => {
+    await UsersService.deleteByIds(req.body.data, req.currentUser);
+    const payload = true;
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/users:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Users]
+ *      summary: Get all users
+ *      description: Get all users
+ *      responses:
+ *        200:
+ *          description: Users list successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Users"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/',
+  wrapAsync(async (req, res) => {
+    const filetype = req.query.filetype;
+
+    const currentUser = req.currentUser;
+    const payload = await UsersDBApi.findAll(req.query, { currentUser });
+    if (filetype && filetype === 'csv') {
+      const fields = ['id', 'firstName', 'lastName', 'phoneNumber', 'email'];
+      const opts = { fields };
+      try {
+        const csv = parse(payload.rows, opts);
+        res.status(200).attachment(csv);
+        res.send(csv);
+      } catch (err) {
+        console.error(err);
+      }
+    } else {
+      res.status(200).send(payload);
+    }
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/users/count:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Users]
+ *      summary: Count all users
+ *      description: Count all users
+ *      responses:
+ *        200:
+ *          description: Users count successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Users"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/count',
+  wrapAsync(async (req, res) => {
+    const currentUser = req.currentUser;
+    const payload = await UsersDBApi.findAll(req.query, null, {
+      countOnly: true,
+      currentUser,
+    });
+
+    res.status(200).send(payload);
+  }),
+);
+
+/**
+ *  @swagger
+ *  /api/users/autocomplete:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Users]
+ *      summary: Find all users that match search criteria
+ *      description: Find all users that match search criteria
+ *      responses:
+ *        200:
+ *          description: Users list successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                type: array
+ *                items:
+ *                  $ref: "#/components/schemas/Users"
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Data not found
+ *        500:
+ *          description: Some server error
+ */
+router.get('/autocomplete', async (req, res) => {
+  const payload = await UsersDBApi.findAllAutocomplete(
+    req.query.query,
+    req.query.limit,
+    req.query.offset,
+  );
+
+  res.status(200).send(payload);
+});
+
+/**
+ * @swagger
+ *  /api/users/{id}:
+ *    get:
+ *      security:
+ *        - bearerAuth: []
+ *      tags: [Users]
+ *      summary: Get selected item
+ *      description: Get selected item
+ *      parameters:
+ *        - in: path
+ *          name: id
+ *          description: ID of item to get
+ *          required: true
+ *          schema:
+ *            type: string
+ *      responses:
+ *        200:
+ *          description: Selected item successfully received
+ *          content:
+ *            application/json:
+ *              schema:
+ *                $ref: "#/components/schemas/Users"
+ *        400:
+ *          description: Invalid ID supplied
+ *        401:
+ *          $ref: "#/components/responses/UnauthorizedError"
+ *        404:
+ *          description: Item not found
+ *        500:
+ *          description: Some server error
+ */
+router.get(
+  '/:id',
+  wrapAsync(async (req, res) => {
+    const payload = await UsersDBApi.findBy({ id: req.params.id });
+
+    delete payload.password;
+
+    res.status(200).send(payload);
+  }),
+);
+
+router.use('/', require('../helpers').commonErrorHandler);
+
+module.exports = router;

backend/src/services/achievements.js

@@ -0,0 +1,117 @@
+const db = require('../db/models');
+const AchievementsDBApi = require('../db/api/achievements');
+const processFile = require('../middlewares/upload');
+const ValidationError = require('./notifications/errors/validation');
+const csv = require('csv-parser');
+const axios = require('axios');
+const config = require('../config');
+const stream = require('stream');
+
+module.exports = class AchievementsService {
+  static async create(data, currentUser) {
+    const transaction = await db.sequelize.transaction();
+    try {
+      await AchievementsDBApi.create(data, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async bulkImport(req, res, sendInvitationEmails = true, host) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await processFile(req, res);
+      const bufferStream = new stream.PassThrough();
+      const results = [];
+
+      await bufferStream.end(Buffer.from(req.file.buffer, 'utf-8')); // convert Buffer to Stream
+
+      await new Promise((resolve, reject) => {
+        bufferStream
+          .pipe(csv())
+          .on('data', (data) => results.push(data))
+          .on('end', async () => {
+            console.log('CSV results', results);
+            resolve();
+          })
+          .on('error', (error) => reject(error));
+      });
+
+      await AchievementsDBApi.bulkImport(results, {
+        transaction,
+        ignoreDuplicates: true,
+        validate: true,
+        currentUser: req.currentUser,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async update(data, id, currentUser) {
+    const transaction = await db.sequelize.transaction();
+    try {
+      let achievements = await AchievementsDBApi.findBy(
+        { id },
+        { transaction },
+      );
+
+      if (!achievements) {
+        throw new ValidationError('achievementsNotFound');
+      }
+
+      const updatedAchievements = await AchievementsDBApi.update(id, data, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+      return updatedAchievements;
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async deleteByIds(ids, currentUser) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await AchievementsDBApi.deleteByIds(ids, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async remove(id, currentUser) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await AchievementsDBApi.remove(id, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+};

backend/src/services/auth.js

@@ -0,0 +1,226 @@
+const UsersDBApi = require('../db/api/users');
+const ValidationError = require('./notifications/errors/validation');
+const ForbiddenError = require('./notifications/errors/forbidden');
+const bcrypt = require('bcrypt');
+const EmailAddressVerificationEmail = require('./email/list/addressVerification');
+const InvitationEmail = require('./email/list/invitation');
+const PasswordResetEmail = require('./email/list/passwordReset');
+const EmailSender = require('./email');
+const config = require('../config');
+const helpers = require('../helpers');
+
+class Auth {
+  static async signup(email, password, options = {}, host) {
+    const user = await UsersDBApi.findBy({ email });
+
+    const hashedPassword = await bcrypt.hash(
+      password,
+      config.bcrypt.saltRounds,
+    );
+
+    if (user) {
+      if (user.authenticationUid) {
+        throw new ValidationError('auth.emailAlreadyInUse');
+      }
+
+      if (user.disabled) {
+        throw new ValidationError('auth.userDisabled');
+      }
+
+      await UsersDBApi.updatePassword(user.id, hashedPassword, options);
+
+      if (EmailSender.isConfigured) {
+        await this.sendEmailAddressVerificationEmail(user.email, host);
+      }
+
+      const data = {
+        user: {
+          id: user.id,
+          email: user.email,
+        },
+      };
+
+      return helpers.jwtSign(data);
+    }
+
+    const newUser = await UsersDBApi.createFromAuth(
+      {
+        firstName: email.split('@')[0],
+        password: hashedPassword,
+        email: email,
+      },
+      options,
+    );
+
+    if (EmailSender.isConfigured) {
+      await this.sendEmailAddressVerificationEmail(newUser.email, host);
+    }
+
+    const data = {
+      user: {
+        id: newUser.id,
+        email: newUser.email,
+      },
+    };
+
+    return helpers.jwtSign(data);
+  }
+
+  static async signin(email, password, options = {}) {
+    const user = await UsersDBApi.findBy({ email });
+
+    if (!user) {
+      throw new ValidationError('auth.userNotFound');
+    }
+
+    if (user.disabled) {
+      throw new ValidationError('auth.userDisabled');
+    }
+
+    if (!user.password) {
+      throw new ValidationError('auth.wrongPassword');
+    }
+
+    if (!EmailSender.isConfigured) {
+      user.emailVerified = true;
+    }
+
+    if (!user.emailVerified) {
+      throw new ValidationError('auth.userNotVerified');
+    }
+
+    const passwordsMatch = await bcrypt.compare(password, user.password);
+
+    if (!passwordsMatch) {
+      throw new ValidationError('auth.wrongPassword');
+    }
+
+    const data = {
+      user: {
+        id: user.id,
+        email: user.email,
+      },
+    };
+
+    return helpers.jwtSign(data);
+  }
+
+  static async sendEmailAddressVerificationEmail(email, host) {
+    let link;
+    try {
+      const token = await UsersDBApi.generateEmailVerificationToken(email);
+      link = `${host}/verify-email?token=${token}`;
+    } catch (error) {
+      console.error(error);
+      throw new ValidationError('auth.emailAddressVerificationEmail.error');
+    }
+
+    const emailAddressVerificationEmail = new EmailAddressVerificationEmail(
+      email,
+      link,
+    );
+
+    return new EmailSender(emailAddressVerificationEmail).send();
+  }
+
+  static async sendPasswordResetEmail(email, type = 'register', host) {
+    let link;
+
+    try {
+      const token = await UsersDBApi.generatePasswordResetToken(email);
+      link = `${host}/password-reset?token=${token}`;
+    } catch (error) {
+      console.error(error);
+      throw new ValidationError('auth.passwordReset.error');
+    }
+
+    let passwordResetEmail;
+    if (type === 'register') {
+      passwordResetEmail = new PasswordResetEmail(email, link);
+    }
+    if (type === 'invitation') {
+      passwordResetEmail = new InvitationEmail(email, link);
+    }
+
+    return new EmailSender(passwordResetEmail).send();
+  }
+
+  static async verifyEmail(token, options = {}) {
+    const user = await UsersDBApi.findByEmailVerificationToken(token, options);
+
+    if (!user) {
+      throw new ValidationError(
+        'auth.emailAddressVerificationEmail.invalidToken',
+      );
+    }
+
+    return UsersDBApi.markEmailVerified(user.id, options);
+  }
+
+  static async passwordUpdate(currentPassword, newPassword, options) {
+    const currentUser = options.currentUser || null;
+    if (!currentUser) {
+      throw new ForbiddenError();
+    }
+
+    const currentPasswordMatch = await bcrypt.compare(
+      currentPassword,
+      currentUser.password,
+    );
+
+    if (!currentPasswordMatch) {
+      throw new ValidationError('auth.wrongPassword');
+    }
+
+    const newPasswordMatch = await bcrypt.compare(
+      newPassword,
+      currentUser.password,
+    );
+
+    if (newPasswordMatch) {
+      throw new ValidationError('auth.passwordUpdate.samePassword');
+    }
+
+    const hashedPassword = await bcrypt.hash(
+      newPassword,
+      config.bcrypt.saltRounds,
+    );
+
+    return UsersDBApi.updatePassword(currentUser.id, hashedPassword, options);
+  }
+
+  static async passwordReset(token, password, options = {}) {
+    const user = await UsersDBApi.findByPasswordResetToken(token, options);
+
+    if (!user) {
+      throw new ValidationError('auth.passwordReset.invalidToken');
+    }
+
+    const hashedPassword = await bcrypt.hash(
+      password,
+      config.bcrypt.saltRounds,
+    );
+
+    return UsersDBApi.updatePassword(user.id, hashedPassword, options);
+  }
+
+  static async updateProfile(data, currentUser) {
+    let transaction = await db.sequelize.transaction();
+
+    try {
+      await UsersDBApi.findBy({ id: currentUser.id }, { transaction });
+
+      await UsersDBApi.update(currentUser.id, data, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+}
+
+module.exports = Auth;

backend/src/services/courses.js

@@ -0,0 +1,114 @@
+const db = require('../db/models');
+const CoursesDBApi = require('../db/api/courses');
+const processFile = require('../middlewares/upload');
+const ValidationError = require('./notifications/errors/validation');
+const csv = require('csv-parser');
+const axios = require('axios');
+const config = require('../config');
+const stream = require('stream');
+
+module.exports = class CoursesService {
+  static async create(data, currentUser) {
+    const transaction = await db.sequelize.transaction();
+    try {
+      await CoursesDBApi.create(data, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async bulkImport(req, res, sendInvitationEmails = true, host) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await processFile(req, res);
+      const bufferStream = new stream.PassThrough();
+      const results = [];
+
+      await bufferStream.end(Buffer.from(req.file.buffer, 'utf-8')); // convert Buffer to Stream
+
+      await new Promise((resolve, reject) => {
+        bufferStream
+          .pipe(csv())
+          .on('data', (data) => results.push(data))
+          .on('end', async () => {
+            console.log('CSV results', results);
+            resolve();
+          })
+          .on('error', (error) => reject(error));
+      });
+
+      await CoursesDBApi.bulkImport(results, {
+        transaction,
+        ignoreDuplicates: true,
+        validate: true,
+        currentUser: req.currentUser,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async update(data, id, currentUser) {
+    const transaction = await db.sequelize.transaction();
+    try {
+      let courses = await CoursesDBApi.findBy({ id }, { transaction });
+
+      if (!courses) {
+        throw new ValidationError('coursesNotFound');
+      }
+
+      const updatedCourses = await CoursesDBApi.update(id, data, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+      return updatedCourses;
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async deleteByIds(ids, currentUser) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await CoursesDBApi.deleteByIds(ids, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async remove(id, currentUser) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await CoursesDBApi.remove(id, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+};

backend/src/services/email/htmlTemplates/addressVerification/emailAddressVerification.html

@@ -0,0 +1,52 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <style>
+      .email-container {
+        max-width: 600px;
+        margin: auto;
+        background-color: #ffffff;
+        border: 1px solid #e2e8f0;
+        border-radius: 4px;
+        overflow: hidden;
+      }
+      .email-header {
+        background-color: #3498db;
+        color: #fff;
+        padding: 16px;
+        text-align: center;
+      }
+      .email-body {
+        padding: 16px;
+      }
+      .email-footer {
+        padding: 16px;
+        background-color: #f7fafc;
+        text-align: center;
+        color: #4a5568;
+        font-size: 14px;
+      }
+      .link-primary {
+        color: #3498db;
+        text-decoration: none;
+      }
+    </style>
+  </head>
+  <body>
+    <div class="email-container">
+      <div class="email-header">Verify your email for {appTitle}!</div>
+      <div class="email-body">
+        <p>Hello,</p>
+        <p>Follow this link to verify your email address.</p>
+        <p>
+          If you didn't ask to verify this address, you can ignore this email.
+        </p>
+        <p><a href="{signupUrl}" class="link-primary">{signupUrl}</a></p>
+      </div>
+      <div class="email-footer">
+        Thanks,<br />
+        The {appTitle} Team
+      </div>
+    </div>
+  </body>
+</html>

backend/src/services/email/htmlTemplates/invitation/invitationTemplate.html

@@ -0,0 +1,56 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <style>
+      .email-container {
+        max-width: 600px;
+        margin: auto;
+        background-color: #ffffff;
+        border: 1px solid #e2e8f0;
+        border-radius: 4px;
+        overflow: hidden;
+      }
+      .email-header {
+        background-color: #3498db;
+        color: #fff;
+        padding: 16px;
+        text-align: center;
+      }
+      .email-body {
+        padding: 16px;
+      }
+      .email-footer {
+        padding: 16px;
+        background-color: #f7fafc;
+        text-align: center;
+        color: #4a5568;
+        font-size: 14px;
+      }
+      .btn-primary {
+        background-color: #3498db;
+        color: #fff !important;
+        padding: 8px 16px;
+        border-radius: 4px;
+        text-decoration: none;
+        display: inline-block;
+      }
+    </style>
+  </head>
+  <body>
+    <div class="email-container">
+      <div class="email-header">Welcome to {appTitle}!</div>
+      <div class="email-body">
+        <p>Hello,</p>
+        <p>
+          You've been invited to join {appTitle}. Please click the button below
+          to set up your account.
+        </p>
+        <a href="{signupUrl}" class="btn-primary">Set up account</a>
+      </div>
+      <div class="email-footer">
+        Thanks,<br />
+        The {appTitle} Team
+      </div>
+    </div>
+  </body>
+</html>

backend/src/services/email/htmlTemplates/passwordReset/passwordResetEmail.html

@@ -0,0 +1,55 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <style>
+      .email-container {
+        max-width: 600px;
+        margin: auto;
+        background-color: #ffffff;
+        border: 1px solid #e2e8f0;
+        border-radius: 4px;
+        overflow: hidden;
+      }
+      .email-header {
+        background-color: #3498db;
+        color: #fff;
+        padding: 16px;
+        text-align: center;
+      }
+      .email-body {
+        padding: 16px;
+      }
+      .email-footer {
+        padding: 16px;
+        background-color: #f7fafc;
+        text-align: center;
+        color: #4a5568;
+        font-size: 14px;
+      }
+      .link-primary {
+        color: #3498db;
+        text-decoration: none;
+      }
+    </style>
+  </head>
+  <body>
+    <div class="email-container">
+      <div class="email-header">Reset your password for {appTitle}</div>
+      <div class="email-body">
+        <p>Hello,</p>
+        <p>
+          Follow this link to reset your {appTitle} password for your
+          {accountName} account.
+        </p>
+        <p><a href="{resetUrl}" class="link-primary">{resetUrl}</a></p>
+        <p>
+          If you didn't ask to reset your password, you can ignore this email.
+        </p>
+      </div>
+      <div class="email-footer">
+        Thanks,<br />
+        The {appTitle} Team
+      </div>
+    </div>
+  </body>
+</html>

backend/src/services/email/index.js

@@ -0,0 +1,41 @@
+const config = require('../../config');
+const assert = require('assert');
+const nodemailer = require('nodemailer');
+
+module.exports = class EmailSender {
+  constructor(email) {
+    this.email = email;
+  }
+
+  async send() {
+    assert(this.email, 'email is required');
+    assert(this.email.to, 'email.to is required');
+    assert(this.email.subject, 'email.subject is required');
+    assert(this.email.html, 'email.html is required');
+
+    const htmlContent = await this.email.html();
+
+    const transporter = nodemailer.createTransport(this.transportConfig);
+
+    const mailOptions = {
+      from: this.from,
+      to: this.email.to,
+      subject: this.email.subject,
+      html: htmlContent,
+    };
+
+    return transporter.sendMail(mailOptions);
+  }
+
+  static get isConfigured() {
+    return !!config.email?.auth?.pass && !!config.email?.auth?.user;
+  }
+
+  get transportConfig() {
+    return config.email;
+  }
+
+  get from() {
+    return config.email.from;
+  }
+};

backend/src/services/email/list/addressVerification.js

@@ -0,0 +1,41 @@
+const { getNotification } = require('../../notifications/helpers');
+const fs = require('fs').promises;
+const path = require('path');
+
+module.exports = class EmailAddressVerificationEmail {
+  constructor(to, link) {
+    this.to = to;
+    this.link = link;
+  }
+
+  get subject() {
+    return getNotification(
+      'emails.emailAddressVerification.subject',
+      getNotification('app.title'),
+    );
+  }
+
+  async html() {
+    try {
+      const templatePath = path.join(
+        __dirname,
+        '../../email/htmlTemplates/addressVerification/emailAddressVerification.html',
+      );
+
+      const template = await fs.readFile(templatePath, 'utf8');
+
+      const appTitle = getNotification('app.title');
+      const signupUrl = this.link;
+
+      let html = template
+        .replace(/{appTitle}/g, appTitle)
+        .replace(/{signupUrl}/g, signupUrl)
+        .replace(/{to}/g, this.to);
+
+      return html;
+    } catch (error) {
+      console.error('Error generating invitation email HTML:', error);
+      throw error;
+    }
+  }
+};

backend/src/services/email/list/invitation.js

@@ -0,0 +1,41 @@
+const fs = require('fs').promises;
+const path = require('path');
+const { getNotification } = require('../../notifications/helpers');
+
+module.exports = class InvitationEmail {
+  constructor(to, host) {
+    this.to = to;
+    this.host = host;
+  }
+
+  get subject() {
+    return getNotification(
+      'emails.invitation.subject',
+      getNotification('app.title'),
+    );
+  }
+
+  async html() {
+    try {
+      const templatePath = path.join(
+        __dirname,
+        '../../email/htmlTemplates/invitation/invitationTemplate.html',
+      );
+
+      const template = await fs.readFile(templatePath, 'utf8');
+
+      const appTitle = getNotification('app.title');
+      const signupUrl = `${this.host}&invitation=true`;
+
+      let html = template
+        .replace(/{appTitle}/g, appTitle)
+        .replace(/{signupUrl}/g, signupUrl)
+        .replace(/{to}/g, this.to);
+
+      return html;
+    } catch (error) {
+      console.error('Error generating invitation email HTML:', error);
+      throw error;
+    }
+  }
+};

backend/src/services/email/list/passwordReset.js

@@ -0,0 +1,42 @@
+const { getNotification } = require('../../notifications/helpers');
+const path = require('path');
+const { promises: fs } = require('fs');
+
+module.exports = class PasswordResetEmail {
+  constructor(to, link) {
+    this.to = to;
+    this.link = link;
+  }
+
+  get subject() {
+    return getNotification(
+      'emails.passwordReset.subject',
+      getNotification('app.title'),
+    );
+  }
+
+  async html() {
+    try {
+      const templatePath = path.join(
+        __dirname,
+        '../../email/htmlTemplates/passwordReset/passwordResetEmail.html',
+      );
+
+      const template = await fs.readFile(templatePath, 'utf8');
+
+      const appTitle = getNotification('app.title');
+      const resetUrl = this.link;
+      const accountName = this.to;
+
+      let html = template
+        .replace(/{appTitle}/g, appTitle)
+        .replace(/{resetUrl}/g, resetUrl)
+        .replace(/{accountName}/g, accountName);
+
+      return html;
+    } catch (error) {
+      console.error('Error generating invitation email HTML:', error);
+      throw error;
+    }
+  }
+};

backend/src/services/file.js

@@ -0,0 +1,202 @@
+const formidable = require('formidable');
+const fs = require('fs');
+const config = require('../config');
+const path = require('path');
+const { format } = require('util');
+
+const ensureDirectoryExistence = (filePath) => {
+  const dirname = path.dirname(filePath);
+
+  if (fs.existsSync(dirname)) {
+    return true;
+  }
+
+  ensureDirectoryExistence(dirname);
+  fs.mkdirSync(dirname);
+};
+
+const uploadLocal = (
+  folder,
+  validations = {
+    entity: null,
+    maxFileSize: null,
+    folderIncludesAuthenticationUid: false,
+  },
+) => {
+  return (req, res) => {
+    if (!req.currentUser) {
+      res.sendStatus(403);
+      return;
+    }
+
+    if (validations.entity) {
+      res.sendStatus(403);
+      return;
+    }
+
+    if (validations.folderIncludesAuthenticationUid) {
+      folder = folder.replace(':userId', req.currentUser.authenticationUid);
+      if (
+        !req.currentUser.authenticationUid ||
+        !folder.includes(req.currentUser.authenticationUid)
+      ) {
+        res.sendStatus(403);
+        return;
+      }
+    }
+
+    const form = new formidable.IncomingForm();
+    form.uploadDir = config.uploadDir;
+
+    if (validations && validations.maxFileSize) {
+      form.maxFileSize = validations.maxFileSize;
+    }
+
+    form.parse(req, function (err, fields, files) {
+      const filename = String(fields.filename);
+      const fileTempUrl = files.file.path;
+
+      if (!filename) {
+        fs.unlinkSync(fileTempUrl);
+        res.sendStatus(500);
+        return;
+      }
+
+      const privateUrl = path.join(form.uploadDir, folder, filename);
+      ensureDirectoryExistence(privateUrl);
+      fs.renameSync(fileTempUrl, privateUrl);
+      res.sendStatus(200);
+    });
+
+    form.on('error', function (err) {
+      res.status(500).send(err);
+    });
+  };
+};
+
+const downloadLocal = async (req, res) => {
+  const privateUrl = req.query.privateUrl;
+  if (!privateUrl) {
+    return res.sendStatus(404);
+  }
+  res.download(path.join(config.uploadDir, privateUrl));
+};
+
+const initGCloud = () => {
+  const processFile = require('../middlewares/upload');
+  const { Storage } = require('@google-cloud/storage');
+
+  const crypto = require('crypto');
+  const hash = config.gcloud.hash;
+
+  const privateKey = process.env.GC_PRIVATE_KEY.replace(/\\\n/g, '\n');
+
+  const storage = new Storage({
+    projectId: process.env.GC_PROJECT_ID,
+    credentials: {
+      client_email: process.env.GC_CLIENT_EMAIL,
+      private_key: privateKey,
+    },
+  });
+
+  const bucket = storage.bucket(config.gcloud.bucket);
+  return { hash, bucket, processFile };
+};
+
+const uploadGCloud = async (folder, req, res) => {
+  try {
+    const { hash, bucket, processFile } = initGCloud();
+    await processFile(req, res);
+    let buffer = await req.file.buffer;
+    let filename = await req.body.filename;
+
+    if (!req.file) {
+      return res.status(400).send({ message: 'Please upload a file!' });
+    }
+
+    let path = `${hash}/${folder}/${filename}`;
+    let blob = bucket.file(path);
+
+    console.log(path);
+
+    const blobStream = blob.createWriteStream({
+      resumable: false,
+    });
+
+    blobStream.on('error', (err) => {
+      console.log('Upload error');
+      console.log(err.message);
+      res.status(500).send({ message: err.message });
+    });
+
+    console.log(`https://storage.googleapis.com/${bucket.name}/${blob.name}`);
+
+    blobStream.on('finish', async (data) => {
+      const publicUrl = format(
+        `https://storage.googleapis.com/${bucket.name}/${blob.name}`,
+      );
+
+      res.status(200).send({
+        message: 'Uploaded the file successfully: ' + path,
+        url: publicUrl,
+      });
+    });
+
+    blobStream.end(buffer);
+  } catch (err) {
+    console.log(err);
+
+    res.status(500).send({
+      message: `Could not upload the file. ${err}`,
+    });
+  }
+};
+
+const downloadGCloud = async (req, res) => {
+  try {
+    const { hash, bucket, processFile } = initGCloud();
+
+    const privateUrl = await req.query.privateUrl;
+    const filePath = `${hash}/${privateUrl}`;
+    const file = bucket.file(filePath);
+    const fileExists = await file.exists();
+
+    if (fileExists[0]) {
+      const stream = file.createReadStream();
+      stream.pipe(res);
+    } else {
+      res.status(404).send({
+        message: 'Could not download the file. ' + err,
+      });
+    }
+  } catch (err) {
+    res.status(404).send({
+      message: 'Could not download the file. ' + err,
+    });
+  }
+};
+
+const deleteGCloud = async (privateUrl) => {
+  try {
+    const { hash, bucket, processFile } = initGCloud();
+    const filePath = `${hash}/${privateUrl}`;
+
+    const file = bucket.file(filePath);
+    const fileExists = await file.exists();
+
+    if (fileExists[0]) {
+      file.delete();
+    }
+  } catch (err) {
+    console.log(`Cannot find the file ${privateUrl}`);
+  }
+};
+
+module.exports = {
+  initGCloud,
+  uploadLocal,
+  downloadLocal,
+  deleteGCloud,
+  uploadGCloud,
+  downloadGCloud,
+};

backend/src/services/notifications/errors/forbidden.js

@@ -0,0 +1,16 @@
+const { getNotification, isNotification } = require('../helpers');
+
+module.exports = class ForbiddenError extends Error {
+  constructor(messageCode) {
+    let message;
+
+    if (messageCode && isNotification(messageCode)) {
+      message = getNotification(messageCode);
+    }
+
+    message = message || getNotification('errors.forbidden.message');
+
+    super(message);
+    this.code = 403;
+  }
+};

backend/src/services/notifications/errors/validation.js

@@ -0,0 +1,16 @@
+const { getNotification, isNotification } = require('../helpers');
+
+module.exports = class ValidationError extends Error {
+  constructor(messageCode) {
+    let message;
+
+    if (messageCode && isNotification(messageCode)) {
+      message = getNotification(messageCode);
+    }
+
+    message = message || getNotification('errors.validation.message');
+
+    super(message);
+    this.code = 400;
+  }
+};

backend/src/services/notifications/helpers.js

@@ -0,0 +1,30 @@
+const _get = require('lodash/get');
+const errors = require('./list');
+
+function format(message, args) {
+  if (!message) {
+    return null;
+  }
+
+  return message.replace(/{(\d+)}/g, function (match, number) {
+    return typeof args[number] != 'undefined' ? args[number] : match;
+  });
+}
+
+const isNotification = (key) => {
+  const message = _get(errors, key);
+  return !!message;
+};
+
+const getNotification = (key, ...args) => {
+  const message = _get(errors, key);
+
+  if (!message) {
+    return key;
+  }
+
+  return format(message, args);
+};
+
+exports.getNotification = getNotification;
+exports.isNotification = isNotification;

backend/src/services/notifications/list.js

@@ -0,0 +1,100 @@
+const errors = {
+  app: {
+    title: 'Student Learner',
+  },
+
+  auth: {
+    userDisabled: 'Your account is disabled',
+    forbidden: 'Forbidden',
+    unauthorized: 'Unauthorized',
+    userNotFound: `Sorry, we don't recognize your credentials`,
+    wrongPassword: `Sorry, we don't recognize your credentials`,
+    weakPassword: 'This password is too weak',
+    emailAlreadyInUse: 'Email is already in use',
+    invalidEmail: 'Please provide a valid email',
+    passwordReset: {
+      invalidToken: 'Password reset link is invalid or has expired',
+      error: `Email not recognized`,
+    },
+    passwordUpdate: {
+      samePassword: `You can't use the same password. Please create new password`,
+    },
+    userNotVerified: `Sorry, your email has not been verified yet`,
+    emailAddressVerificationEmail: {
+      invalidToken: 'Email verification link is invalid or has expired',
+      error: `Email not recognized`,
+    },
+  },
+
+  iam: {
+    errors: {
+      userAlreadyExists: 'User with this email already exists',
+      userNotFound: 'User not found',
+      disablingHimself: `You can't disable yourself`,
+      revokingOwnPermission: `You can't revoke your own owner permission`,
+      deletingHimself: `You can't delete yourself`,
+      emailRequired: 'Email is required',
+    },
+  },
+
+  importer: {
+    errors: {
+      invalidFileEmpty: 'The file is empty',
+      invalidFileExcel: 'Only excel (.xlsx) files are allowed',
+      invalidFileUpload:
+        'Invalid file. Make sure you are using the last version of the template.',
+      importHashRequired: 'Import hash is required',
+      importHashExistent: 'Data has already been imported',
+      userEmailMissing: 'Some items in the CSV do not have an email',
+    },
+  },
+
+  errors: {
+    forbidden: {
+      message: 'Forbidden',
+    },
+    validation: {
+      message: 'An error occurred',
+    },
+    searchQueryRequired: {
+      message: 'Search query is required',
+    },
+  },
+
+  emails: {
+    invitation: {
+      subject: `You've been invited to {0}`,
+      body: `    
+        <p>Hello,</p>
+        <p>You've been invited to {0} set password for your {1} account.</p>
+        <p><a href='{2}'>{2}</a></p>
+        <p>Thanks,</p>
+        <p>Your {0} team</p>
+      `,
+    },
+    emailAddressVerification: {
+      subject: `Verify your email for {0}`,
+      body: `
+        <p>Hello,</p>
+        <p>Follow this link to verify your email address.</p>
+        <p><a href='{0}'>{0}</a></p>
+        <p>If you didn't ask to verify this address, you can ignore this email.</p>
+        <p>Thanks,</p>
+        <p>Your {1} team</p>
+      `,
+    },
+    passwordReset: {
+      subject: `Reset your password for {0}`,
+      body: `
+        <p>Hello,</p>
+        <p>Follow this link to reset your {0} password for your {1} account.</p>
+        <p><a href='{2}'>{2}</a></p>
+        <p>If you didn't ask to reset your password, you can ignore this email.</p>
+        <p>Thanks,</p>
+        <p>Your {0} team</p>
+      `,
+    },
+  },
+};
+
+module.exports = errors;

backend/src/services/openai.js

@@ -0,0 +1,22 @@
+const axios = require('axios');
+const { v4: uuid } = require('uuid');
+const RoleService = require('./roles');
+const config = require('../config');
+
+module.exports = class OpenAiService {
+  static async getWidget(payload, userId, roleId) {
+    const response = await axios.post(
+      `${config.flHost}/${config.project_uuid}/project_customization_widgets.json`,
+      payload,
+    );
+
+    if (response.status >= 200 && response.status < 300) {
+      const { widget_id } = await response.data;
+      await RoleService.addRoleInfo(roleId, userId, 'widgets', widget_id);
+      return widget_id;
+    } else {
+      console.error('=======error=======', response.data);
+      return { value: null, error: response.data };
+    }
+  }
+};

backend/src/services/options.js

@@ -0,0 +1,114 @@
+const db = require('../db/models');
+const OptionsDBApi = require('../db/api/options');
+const processFile = require('../middlewares/upload');
+const ValidationError = require('./notifications/errors/validation');
+const csv = require('csv-parser');
+const axios = require('axios');
+const config = require('../config');
+const stream = require('stream');
+
+module.exports = class OptionsService {
+  static async create(data, currentUser) {
+    const transaction = await db.sequelize.transaction();
+    try {
+      await OptionsDBApi.create(data, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async bulkImport(req, res, sendInvitationEmails = true, host) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await processFile(req, res);
+      const bufferStream = new stream.PassThrough();
+      const results = [];
+
+      await bufferStream.end(Buffer.from(req.file.buffer, 'utf-8')); // convert Buffer to Stream
+
+      await new Promise((resolve, reject) => {
+        bufferStream
+          .pipe(csv())
+          .on('data', (data) => results.push(data))
+          .on('end', async () => {
+            console.log('CSV results', results);
+            resolve();
+          })
+          .on('error', (error) => reject(error));
+      });
+
+      await OptionsDBApi.bulkImport(results, {
+        transaction,
+        ignoreDuplicates: true,
+        validate: true,
+        currentUser: req.currentUser,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async update(data, id, currentUser) {
+    const transaction = await db.sequelize.transaction();
+    try {
+      let options = await OptionsDBApi.findBy({ id }, { transaction });
+
+      if (!options) {
+        throw new ValidationError('optionsNotFound');
+      }
+
+      const updatedOptions = await OptionsDBApi.update(id, data, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+      return updatedOptions;
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async deleteByIds(ids, currentUser) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await OptionsDBApi.deleteByIds(ids, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async remove(id, currentUser) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await OptionsDBApi.remove(id, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+};

backend/src/services/parents.js

@@ -0,0 +1,114 @@
+const db = require('../db/models');
+const ParentsDBApi = require('../db/api/parents');
+const processFile = require('../middlewares/upload');
+const ValidationError = require('./notifications/errors/validation');
+const csv = require('csv-parser');
+const axios = require('axios');
+const config = require('../config');
+const stream = require('stream');
+
+module.exports = class ParentsService {
+  static async create(data, currentUser) {
+    const transaction = await db.sequelize.transaction();
+    try {
+      await ParentsDBApi.create(data, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async bulkImport(req, res, sendInvitationEmails = true, host) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await processFile(req, res);
+      const bufferStream = new stream.PassThrough();
+      const results = [];
+
+      await bufferStream.end(Buffer.from(req.file.buffer, 'utf-8')); // convert Buffer to Stream
+
+      await new Promise((resolve, reject) => {
+        bufferStream
+          .pipe(csv())
+          .on('data', (data) => results.push(data))
+          .on('end', async () => {
+            console.log('CSV results', results);
+            resolve();
+          })
+          .on('error', (error) => reject(error));
+      });
+
+      await ParentsDBApi.bulkImport(results, {
+        transaction,
+        ignoreDuplicates: true,
+        validate: true,
+        currentUser: req.currentUser,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async update(data, id, currentUser) {
+    const transaction = await db.sequelize.transaction();
+    try {
+      let parents = await ParentsDBApi.findBy({ id }, { transaction });
+
+      if (!parents) {
+        throw new ValidationError('parentsNotFound');
+      }
+
+      const updatedParents = await ParentsDBApi.update(id, data, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+      return updatedParents;
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async deleteByIds(ids, currentUser) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await ParentsDBApi.deleteByIds(ids, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async remove(id, currentUser) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await ParentsDBApi.remove(id, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+};

backend/src/services/permissions.js

@@ -0,0 +1,114 @@
+const db = require('../db/models');
+const PermissionsDBApi = require('../db/api/permissions');
+const processFile = require('../middlewares/upload');
+const ValidationError = require('./notifications/errors/validation');
+const csv = require('csv-parser');
+const axios = require('axios');
+const config = require('../config');
+const stream = require('stream');
+
+module.exports = class PermissionsService {
+  static async create(data, currentUser) {
+    const transaction = await db.sequelize.transaction();
+    try {
+      await PermissionsDBApi.create(data, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async bulkImport(req, res, sendInvitationEmails = true, host) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await processFile(req, res);
+      const bufferStream = new stream.PassThrough();
+      const results = [];
+
+      await bufferStream.end(Buffer.from(req.file.buffer, 'utf-8')); // convert Buffer to Stream
+
+      await new Promise((resolve, reject) => {
+        bufferStream
+          .pipe(csv())
+          .on('data', (data) => results.push(data))
+          .on('end', async () => {
+            console.log('CSV results', results);
+            resolve();
+          })
+          .on('error', (error) => reject(error));
+      });
+
+      await PermissionsDBApi.bulkImport(results, {
+        transaction,
+        ignoreDuplicates: true,
+        validate: true,
+        currentUser: req.currentUser,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async update(data, id, currentUser) {
+    const transaction = await db.sequelize.transaction();
+    try {
+      let permissions = await PermissionsDBApi.findBy({ id }, { transaction });
+
+      if (!permissions) {
+        throw new ValidationError('permissionsNotFound');
+      }
+
+      const updatedPermissions = await PermissionsDBApi.update(id, data, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+      return updatedPermissions;
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async deleteByIds(ids, currentUser) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await PermissionsDBApi.deleteByIds(ids, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async remove(id, currentUser) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await PermissionsDBApi.remove(id, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+};

backend/src/services/questions.js

@@ -0,0 +1,114 @@
+const db = require('../db/models');
+const QuestionsDBApi = require('../db/api/questions');
+const processFile = require('../middlewares/upload');
+const ValidationError = require('./notifications/errors/validation');
+const csv = require('csv-parser');
+const axios = require('axios');
+const config = require('../config');
+const stream = require('stream');
+
+module.exports = class QuestionsService {
+  static async create(data, currentUser) {
+    const transaction = await db.sequelize.transaction();
+    try {
+      await QuestionsDBApi.create(data, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async bulkImport(req, res, sendInvitationEmails = true, host) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await processFile(req, res);
+      const bufferStream = new stream.PassThrough();
+      const results = [];
+
+      await bufferStream.end(Buffer.from(req.file.buffer, 'utf-8')); // convert Buffer to Stream
+
+      await new Promise((resolve, reject) => {
+        bufferStream
+          .pipe(csv())
+          .on('data', (data) => results.push(data))
+          .on('end', async () => {
+            console.log('CSV results', results);
+            resolve();
+          })
+          .on('error', (error) => reject(error));
+      });
+
+      await QuestionsDBApi.bulkImport(results, {
+        transaction,
+        ignoreDuplicates: true,
+        validate: true,
+        currentUser: req.currentUser,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async update(data, id, currentUser) {
+    const transaction = await db.sequelize.transaction();
+    try {
+      let questions = await QuestionsDBApi.findBy({ id }, { transaction });
+
+      if (!questions) {
+        throw new ValidationError('questionsNotFound');
+      }
+
+      const updatedQuestions = await QuestionsDBApi.update(id, data, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+      return updatedQuestions;
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async deleteByIds(ids, currentUser) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await QuestionsDBApi.deleteByIds(ids, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async remove(id, currentUser) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await QuestionsDBApi.remove(id, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+};

backend/src/services/quizzes.js

@@ -0,0 +1,114 @@
+const db = require('../db/models');
+const QuizzesDBApi = require('../db/api/quizzes');
+const processFile = require('../middlewares/upload');
+const ValidationError = require('./notifications/errors/validation');
+const csv = require('csv-parser');
+const axios = require('axios');
+const config = require('../config');
+const stream = require('stream');
+
+module.exports = class QuizzesService {
+  static async create(data, currentUser) {
+    const transaction = await db.sequelize.transaction();
+    try {
+      await QuizzesDBApi.create(data, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async bulkImport(req, res, sendInvitationEmails = true, host) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await processFile(req, res);
+      const bufferStream = new stream.PassThrough();
+      const results = [];
+
+      await bufferStream.end(Buffer.from(req.file.buffer, 'utf-8')); // convert Buffer to Stream
+
+      await new Promise((resolve, reject) => {
+        bufferStream
+          .pipe(csv())
+          .on('data', (data) => results.push(data))
+          .on('end', async () => {
+            console.log('CSV results', results);
+            resolve();
+          })
+          .on('error', (error) => reject(error));
+      });
+
+      await QuizzesDBApi.bulkImport(results, {
+        transaction,
+        ignoreDuplicates: true,
+        validate: true,
+        currentUser: req.currentUser,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async update(data, id, currentUser) {
+    const transaction = await db.sequelize.transaction();
+    try {
+      let quizzes = await QuizzesDBApi.findBy({ id }, { transaction });
+
+      if (!quizzes) {
+        throw new ValidationError('quizzesNotFound');
+      }
+
+      const updatedQuizzes = await QuizzesDBApi.update(id, data, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+      return updatedQuizzes;
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async deleteByIds(ids, currentUser) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await QuizzesDBApi.deleteByIds(ids, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async remove(id, currentUser) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await QuizzesDBApi.remove(id, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+};

backend/src/services/roles.js

@@ -0,0 +1,430 @@
+const db = require('../db/models');
+const RolesDBApi = require('../db/api/roles');
+const processFile = require('../middlewares/upload');
+const ValidationError = require('./notifications/errors/validation');
+const csv = require('csv-parser');
+const axios = require('axios');
+const config = require('../config');
+const stream = require('stream');
+
+function buildWidgetResult(widget, queryResult, queryString) {
+  if (queryResult[0] && queryResult[0].length) {
+    const key = Object.keys(queryResult[0][0])[0];
+    const value =
+      widget.widget_type === 'scalar' ? queryResult[0][0][key] : queryResult[0];
+    const widgetData = JSON.parse(widget.data);
+    return { ...widget, ...widgetData, value, query: queryString };
+  } else {
+    return { ...widget, value: [], query: queryString };
+  }
+}
+
+async function executeQuery(queryString, currentUser) {
+  try {
+    return await db.sequelize.query(queryString, {
+      replacements: { organizationId: currentUser.organizationId },
+    });
+  } catch (e) {
+    console.log(e);
+    return [];
+  }
+}
+
+function insertWhereConditions(queryString, whereConditions) {
+  if (!whereConditions) return queryString;
+
+  const whereIndex = queryString.toLowerCase().indexOf('where');
+  const groupByIndex = queryString.toLowerCase().indexOf('group by');
+  const insertIndex =
+    whereIndex === -1
+      ? groupByIndex !== -1
+        ? groupByIndex
+        : queryString.length
+      : whereIndex + 5;
+
+  const prefix = queryString.substring(0, insertIndex);
+  const suffix = queryString.substring(insertIndex);
+  const conditionString =
+    whereIndex === -1
+      ? ` WHERE ${whereConditions} `
+      : ` ${whereConditions} AND `;
+
+  return `${prefix}${conditionString}${suffix}`;
+}
+
+function constructWhereConditions(mainTable, currentUser, replacements) {
+  const {
+    organizationId,
+    app_role: { globalAccess },
+  } = currentUser;
+  const tablesWithoutOrgId = ['permissions', 'roles'];
+  let whereConditions = '';
+
+  if (!globalAccess && !tablesWithoutOrgId.includes(mainTable)) {
+    whereConditions += `"${mainTable}"."organizationId" = :organizationId`;
+    replacements.organizationId = organizationId;
+  }
+
+  if (mainTable !== 'users') {
+    whereConditions += whereConditions ? ' AND ' : '';
+    whereConditions += `"${mainTable}"."deletedAt" IS NULL`;
+  }
+
+  return whereConditions;
+}
+
+function extractTableName(queryString) {
+  const tableNameRegex = /FROM\s+("?)([^"\s]+)\1\s*/i;
+  const match = tableNameRegex.exec(queryString);
+  return match ? match[2] : null;
+}
+
+function buildQueryString(widget, currentUser) {
+  let queryString = widget?.query || '';
+  const tableName = extractTableName(queryString);
+  const mainTable = JSON.parse(widget?.data)?.main_table || tableName;
+  const replacements = {};
+  const whereConditions = constructWhereConditions(
+    mainTable,
+    currentUser,
+    replacements,
+  );
+  queryString = insertWhereConditions(queryString, whereConditions);
+  console.log(queryString, 'queryString');
+  return queryString;
+}
+
+async function constructWidgetsResults(widgets, currentUser) {
+  const widgetsResults = [];
+  for (const widget of widgets) {
+    if (!widget) continue;
+    const queryString = buildQueryString(widget, currentUser);
+    const queryResult = await executeQuery(queryString, currentUser);
+    widgetsResults.push(buildWidgetResult(widget, queryResult, queryString));
+  }
+  return widgetsResults;
+}
+
+async function fetchWidgetsData(widgets) {
+  const widgetPromises = (widgets || []).map((widgetId) =>
+    axios.get(
+      `${config.flHost}/${config.project_uuid}/project_customization_widgets/${widgetId}.json`,
+    ),
+  );
+  const widgetResults = widgetPromises
+    ? await Promise.allSettled(widgetPromises)
+    : [];
+  return widgetResults
+    .filter((result) => result.status === 'fulfilled')
+    .map((result) => result.value.data);
+}
+
+async function processWidgets(widgets, currentUser) {
+  const widgetData = await fetchWidgetsData(widgets);
+  return constructWidgetsResults(widgetData, currentUser);
+}
+
+function parseCustomization(role) {
+  try {
+    return JSON.parse(role.role_customization || '{}');
+  } catch (e) {
+    console.log(e);
+    return {};
+  }
+}
+
+async function findRole(roleId, currentUser) {
+  const transaction = await db.sequelize.transaction();
+  try {
+    const role = roleId
+      ? await RolesDBApi.findBy({ id: roleId }, { transaction })
+      : await RolesDBApi.findBy({ name: 'User' }, { transaction });
+    await transaction.commit();
+    return role;
+  } catch (error) {
+    await transaction.rollback();
+    throw error;
+  }
+}
+
+module.exports = class RolesService {
+  static async create(data, currentUser) {
+    const transaction = await db.sequelize.transaction();
+    try {
+      await RolesDBApi.create(data, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async bulkImport(req, res, sendInvitationEmails = true, host) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await processFile(req, res);
+      const bufferStream = new stream.PassThrough();
+      const results = [];
+
+      await bufferStream.end(Buffer.from(req.file.buffer, 'utf-8')); // convert Buffer to Stream
+
+      await new Promise((resolve, reject) => {
+        bufferStream
+          .pipe(csv())
+          .on('data', (data) => results.push(data))
+          .on('end', async () => {
+            console.log('CSV results', results);
+            resolve();
+          })
+          .on('error', (error) => reject(error));
+      });
+
+      await RolesDBApi.bulkImport(results, {
+        transaction,
+        ignoreDuplicates: true,
+        validate: true,
+        currentUser: req.currentUser,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async update(data, id, currentUser) {
+    const transaction = await db.sequelize.transaction();
+    try {
+      let roles = await RolesDBApi.findBy({ id }, { transaction });
+
+      if (!roles) {
+        throw new ValidationError('rolesNotFound');
+      }
+
+      const updatedRoles = await RolesDBApi.update(id, data, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+      return updatedRoles;
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async deleteByIds(ids, currentUser) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await RolesDBApi.deleteByIds(ids, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async remove(id, currentUser) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await RolesDBApi.remove(id, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async addRoleInfo(roleId, userId, key, widgetId, currentUser) {
+    const regexExpForUuid =
+      /^[0-9a-fA-F]{8}\b-[0-9a-fA-F]{4}\b-[0-9a-fA-F]{4}\b-[0-9a-fA-F]{4}\b-[0-9a-fA-F]{12}$/gi;
+    const widgetIdIsUUID = regexExpForUuid.test(widgetId);
+
+    const transaction = await db.sequelize.transaction();
+    let role;
+    if (roleId) {
+      role = await RolesDBApi.findBy({ id: roleId }, { transaction });
+    } else {
+      role = await RolesDBApi.findBy({ name: 'User' }, { transaction });
+    }
+
+    if (!role) {
+      throw new ValidationError('rolesNotFound');
+    }
+
+    try {
+      let customization = {};
+      try {
+        customization = JSON.parse(role.role_customization || '{}');
+      } catch (e) {
+        console.log(e);
+      }
+
+      if (widgetIdIsUUID && Array.isArray(customization[key])) {
+        const el = customization[key].find((e) => e === widgetId);
+        !el ? customization[key].unshift(widgetId) : null;
+      }
+
+      if (widgetIdIsUUID && !customization[key]) {
+        customization[key] = [widgetId];
+      }
+
+      const newRole = await RolesDBApi.update(
+        role.id,
+        {
+          role_customization: JSON.stringify(customization),
+          name: role.name,
+          permissions: role.permissions,
+        },
+        {
+          currentUser,
+          transaction,
+        },
+      );
+
+      await transaction.commit();
+
+      return newRole;
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async removeRoleInfoById(infoId, roleId, key, currentUser) {
+    const transaction = await db.sequelize.transaction();
+
+    let role;
+    if (roleId) {
+      role = await RolesDBApi.findBy({ id: roleId }, { transaction });
+    } else {
+      role = await RolesDBApi.findBy({ name: 'User' }, { transaction });
+    }
+    if (!role) {
+      await transaction.rollback();
+      throw new ValidationError('rolesNotFound');
+    }
+
+    let customization = {};
+    try {
+      customization = JSON.parse(role.role_customization || '{}');
+    } catch (e) {
+      console.log(e);
+    }
+
+    customization[key] = customization[key].filter((item) => item !== infoId);
+
+    const response = await axios.delete(
+      `${config.flHost}/${config.project_uuid}/project_customization_widgets/${infoId}.json`,
+    );
+    const { status } = await response;
+    try {
+      const result = await RolesDBApi.update(
+        role.id,
+        {
+          role_customization: JSON.stringify(customization),
+          name: role.name,
+          permissions: role.permissions,
+        },
+        {
+          currentUser,
+          transaction,
+        },
+      );
+
+      await transaction.commit();
+      return result;
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async getRoleInfoByKey(key, roleId, currentUser) {
+    const transaction = await db.sequelize.transaction();
+
+    const organizationId = currentUser.organizationId;
+    let globalAccess = currentUser.app_role?.globalAccess;
+    let queryString = '';
+
+    let role;
+    try {
+      if (roleId) {
+        role = await RolesDBApi.findBy({ id: roleId }, { transaction });
+      } else {
+        role = await RolesDBApi.findBy({ name: 'User' }, { transaction });
+      }
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+
+    let customization = '{}';
+
+    try {
+      customization = JSON.parse(role.role_customization || '{}');
+    } catch (e) {
+      console.log(e);
+    }
+
+    if (key === 'widgets') {
+      const widgets = customization[key] || [];
+      const widgetArray = widgets.map((widget) => {
+        return axios.get(
+          `${config.flHost}/${config.project_uuid}/project_customization_widgets/${widget}.json`,
+        );
+      });
+      const widgetResults = await Promise.allSettled(widgetArray);
+
+      const fulfilledWidgets = widgetResults.map((result) => {
+        if (result.status === 'fulfilled') {
+          return result.value.data;
+        }
+      });
+
+      const widgetsResults = [];
+
+      if (Array.isArray(fulfilledWidgets)) {
+        for (const widget of fulfilledWidgets) {
+          let result = [];
+          try {
+            result = await db.sequelize.query(widget.query);
+          } catch (e) {
+            console.log(e);
+          }
+
+          if (result[0] && result[0].length) {
+            const key = Object.keys(result[0][0])[0];
+            const value =
+              widget.widget_type === 'scalar' ? result[0][0][key] : result[0];
+            const widgetData = JSON.parse(widget.data);
+            widgetsResults.push({ ...widget, ...widgetData, value });
+          } else {
+            widgetsResults.push({ ...widget, value: null });
+          }
+        }
+      }
+      return widgetsResults;
+    }
+    return customization[key];
+  }
+};

backend/src/services/search.js

@@ -0,0 +1,147 @@
+const db = require('../db/models');
+const ValidationError = require('./notifications/errors/validation');
+
+const Sequelize = db.Sequelize;
+const Op = Sequelize.Op;
+
+/**
+ * @param {string} permission
+ * @param {object} currentUser
+ */
+async function checkPermissions(permission, currentUser) {
+  if (!currentUser) {
+    throw new ValidationError('auth.unauthorized');
+  }
+
+  const userPermission = currentUser.custom_permissions.find(
+    (cp) => cp.name === permission,
+  );
+
+  if (userPermission) {
+    return true;
+  }
+
+  try {
+    if (!currentUser.app_role) {
+      throw new ValidationError('auth.forbidden');
+    }
+
+    const permissions = await currentUser.app_role.getPermissions();
+
+    return !!permissions.find((p) => p.name === permission);
+  } catch (e) {
+    throw e;
+  }
+}
+
+module.exports = class SearchService {
+  static async search(searchQuery, currentUser) {
+    try {
+      if (!searchQuery) {
+        throw new ValidationError('iam.errors.searchQueryRequired');
+      }
+      const tableColumns = {
+        users: ['firstName', 'lastName', 'phoneNumber', 'email'],
+
+        achievements: ['name', 'description'],
+
+        courses: ['title', 'description'],
+
+        options: ['text'],
+
+        parents: ['name'],
+
+        questions: ['content'],
+
+        quizzes: ['title'],
+
+        students: ['name'],
+
+        tasks: ['title'],
+
+        teachers: ['name'],
+      };
+      const columnsInt = {};
+
+      let allFoundRecords = [];
+
+      for (const tableName in tableColumns) {
+        if (tableColumns.hasOwnProperty(tableName)) {
+          const attributesToSearch = tableColumns[tableName];
+          const attributesIntToSearch = columnsInt[tableName] || [];
+          const whereCondition = {
+            [Op.or]: [
+              ...attributesToSearch.map((attribute) => ({
+                [attribute]: {
+                  [Op.iLike]: `%${searchQuery}%`,
+                },
+              })),
+              ...attributesIntToSearch.map((attribute) =>
+                Sequelize.where(
+                  Sequelize.cast(
+                    Sequelize.col(`${tableName}.${attribute}`),
+                    'varchar',
+                  ),
+                  { [Op.iLike]: `%${searchQuery}%` },
+                ),
+              ),
+            ],
+          };
+
+          const hasPermission = await checkPermissions(
+            `READ_${tableName.toUpperCase()}`,
+            currentUser,
+          );
+          if (!hasPermission) {
+            continue;
+          }
+
+          const foundRecords = await db[tableName].findAll({
+            where: whereCondition,
+            attributes: [
+              ...tableColumns[tableName],
+              'id',
+              ...attributesIntToSearch,
+            ],
+          });
+
+          const modifiedRecords = foundRecords.map((record) => {
+            const matchAttribute = [];
+
+            for (const attribute of attributesToSearch) {
+              if (
+                record[attribute]
+                  ?.toLowerCase()
+                  ?.includes(searchQuery.toLowerCase())
+              ) {
+                matchAttribute.push(attribute);
+              }
+            }
+
+            for (const attribute of attributesIntToSearch) {
+              const castedValue = String(record[attribute]);
+              if (
+                castedValue &&
+                castedValue.toLowerCase().includes(searchQuery.toLowerCase())
+              ) {
+                matchAttribute.push(attribute);
+              }
+            }
+
+            return {
+              ...record.get(),
+              matchAttribute,
+              tableName,
+            };
+          });
+
+          allFoundRecords = allFoundRecords.concat(modifiedRecords);
+        }
+      }
+
+      return allFoundRecords;
+    } catch (error) {
+      throw error;
+    }
+  }
+};

backend/src/services/students.js

@@ -0,0 +1,114 @@
+const db = require('../db/models');
+const StudentsDBApi = require('../db/api/students');
+const processFile = require('../middlewares/upload');
+const ValidationError = require('./notifications/errors/validation');
+const csv = require('csv-parser');
+const axios = require('axios');
+const config = require('../config');
+const stream = require('stream');
+
+module.exports = class StudentsService {
+  static async create(data, currentUser) {
+    const transaction = await db.sequelize.transaction();
+    try {
+      await StudentsDBApi.create(data, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async bulkImport(req, res, sendInvitationEmails = true, host) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await processFile(req, res);
+      const bufferStream = new stream.PassThrough();
+      const results = [];
+
+      await bufferStream.end(Buffer.from(req.file.buffer, 'utf-8')); // convert Buffer to Stream
+
+      await new Promise((resolve, reject) => {
+        bufferStream
+          .pipe(csv())
+          .on('data', (data) => results.push(data))
+          .on('end', async () => {
+            console.log('CSV results', results);
+            resolve();
+          })
+          .on('error', (error) => reject(error));
+      });
+
+      await StudentsDBApi.bulkImport(results, {
+        transaction,
+        ignoreDuplicates: true,
+        validate: true,
+        currentUser: req.currentUser,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async update(data, id, currentUser) {
+    const transaction = await db.sequelize.transaction();
+    try {
+      let students = await StudentsDBApi.findBy({ id }, { transaction });
+
+      if (!students) {
+        throw new ValidationError('studentsNotFound');
+      }
+
+      const updatedStudents = await StudentsDBApi.update(id, data, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+      return updatedStudents;
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async deleteByIds(ids, currentUser) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await StudentsDBApi.deleteByIds(ids, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async remove(id, currentUser) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await StudentsDBApi.remove(id, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+};

backend/src/services/tasks.js

@@ -0,0 +1,114 @@
+const db = require('../db/models');
+const TasksDBApi = require('../db/api/tasks');
+const processFile = require('../middlewares/upload');
+const ValidationError = require('./notifications/errors/validation');
+const csv = require('csv-parser');
+const axios = require('axios');
+const config = require('../config');
+const stream = require('stream');
+
+module.exports = class TasksService {
+  static async create(data, currentUser) {
+    const transaction = await db.sequelize.transaction();
+    try {
+      await TasksDBApi.create(data, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async bulkImport(req, res, sendInvitationEmails = true, host) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await processFile(req, res);
+      const bufferStream = new stream.PassThrough();
+      const results = [];
+
+      await bufferStream.end(Buffer.from(req.file.buffer, 'utf-8')); // convert Buffer to Stream
+
+      await new Promise((resolve, reject) => {
+        bufferStream
+          .pipe(csv())
+          .on('data', (data) => results.push(data))
+          .on('end', async () => {
+            console.log('CSV results', results);
+            resolve();
+          })
+          .on('error', (error) => reject(error));
+      });
+
+      await TasksDBApi.bulkImport(results, {
+        transaction,
+        ignoreDuplicates: true,
+        validate: true,
+        currentUser: req.currentUser,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async update(data, id, currentUser) {
+    const transaction = await db.sequelize.transaction();
+    try {
+      let tasks = await TasksDBApi.findBy({ id }, { transaction });
+
+      if (!tasks) {
+        throw new ValidationError('tasksNotFound');
+      }
+
+      const updatedTasks = await TasksDBApi.update(id, data, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+      return updatedTasks;
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async deleteByIds(ids, currentUser) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await TasksDBApi.deleteByIds(ids, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async remove(id, currentUser) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await TasksDBApi.remove(id, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+};

backend/src/services/teachers.js

@@ -0,0 +1,114 @@
+const db = require('../db/models');
+const TeachersDBApi = require('../db/api/teachers');
+const processFile = require('../middlewares/upload');
+const ValidationError = require('./notifications/errors/validation');
+const csv = require('csv-parser');
+const axios = require('axios');
+const config = require('../config');
+const stream = require('stream');
+
+module.exports = class TeachersService {
+  static async create(data, currentUser) {
+    const transaction = await db.sequelize.transaction();
+    try {
+      await TeachersDBApi.create(data, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async bulkImport(req, res, sendInvitationEmails = true, host) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await processFile(req, res);
+      const bufferStream = new stream.PassThrough();
+      const results = [];
+
+      await bufferStream.end(Buffer.from(req.file.buffer, 'utf-8')); // convert Buffer to Stream
+
+      await new Promise((resolve, reject) => {
+        bufferStream
+          .pipe(csv())
+          .on('data', (data) => results.push(data))
+          .on('end', async () => {
+            console.log('CSV results', results);
+            resolve();
+          })
+          .on('error', (error) => reject(error));
+      });
+
+      await TeachersDBApi.bulkImport(results, {
+        transaction,
+        ignoreDuplicates: true,
+        validate: true,
+        currentUser: req.currentUser,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async update(data, id, currentUser) {
+    const transaction = await db.sequelize.transaction();
+    try {
+      let teachers = await TeachersDBApi.findBy({ id }, { transaction });
+
+      if (!teachers) {
+        throw new ValidationError('teachersNotFound');
+      }
+
+      const updatedTeachers = await TeachersDBApi.update(id, data, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+      return updatedTeachers;
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async deleteByIds(ids, currentUser) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await TeachersDBApi.deleteByIds(ids, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async remove(id, currentUser) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      await TeachersDBApi.remove(id, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+};

backend/src/services/users.js

@@ -0,0 +1,152 @@
+const db = require('../db/models');
+const UsersDBApi = require('../db/api/users');
+const processFile = require('../middlewares/upload');
+const ValidationError = require('./notifications/errors/validation');
+const csv = require('csv-parser');
+const axios = require('axios');
+const config = require('../config');
+const stream = require('stream');
+
+const InvitationEmail = require('./email/list/invitation');
+const EmailSender = require('./email');
+const AuthService = require('./auth');
+
+module.exports = class UsersService {
+  static async create(data, currentUser, sendInvitationEmails = true, host) {
+    let transaction = await db.sequelize.transaction();
+
+    let email = data.email;
+    let emailsToInvite = [];
+    try {
+      if (email) {
+        let user = await UsersDBApi.findBy({ email }, { transaction });
+        if (user) {
+          throw new ValidationError('iam.errors.userAlreadyExists');
+        } else {
+          await UsersDBApi.create(
+            { data },
+
+            {
+              currentUser,
+              transaction,
+            },
+          );
+          emailsToInvite.push(email);
+        }
+      } else {
+        throw new ValidationError('iam.errors.emailRequired');
+      }
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+    if (emailsToInvite && emailsToInvite.length) {
+      if (!sendInvitationEmails) return;
+
+      AuthService.sendPasswordResetEmail(email, 'invitation', host);
+    }
+  }
+
+  static async bulkImport(req, res, sendInvitationEmails = true, host) {
+    const transaction = await db.sequelize.transaction();
+    let emailsToInvite = [];
+
+    try {
+      await processFile(req, res);
+      const bufferStream = new stream.PassThrough();
+      const results = [];
+
+      await bufferStream.end(Buffer.from(req.file.buffer, 'utf-8')); // convert Buffer to Stream
+
+      await new Promise((resolve, reject) => {
+        bufferStream
+          .pipe(csv())
+          .on('data', (data) => results.push(data))
+          .on('end', () => {
+            console.log('results csv', results);
+            resolve();
+          })
+          .on('error', (error) => reject(error));
+      });
+
+      const hasAllEmails = results.every((result) => result.email);
+
+      if (!hasAllEmails) {
+        throw new ValidationError('importer.errors.userEmailMissing');
+      }
+
+      await UsersDBApi.bulkImport(results, {
+        transaction,
+        ignoreDuplicates: true,
+        validate: true,
+        currentUser: req.currentUser,
+      });
+
+      emailsToInvite = results.map((result) => result.email);
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+
+    if (emailsToInvite && emailsToInvite.length && !sendInvitationEmails) {
+      emailsToInvite.forEach((email) => {
+        AuthService.sendPasswordResetEmail(email, 'invitation', host);
+      });
+    }
+  }
+
+  static async update(data, id, currentUser) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      let users = await UsersDBApi.findBy({ id }, { transaction });
+
+      if (!users) {
+        throw new ValidationError('iam.errors.userNotFound');
+      }
+
+      const updatedUser = await UsersDBApi.update(
+        id,
+        data,
+
+        {
+          currentUser,
+          transaction,
+        },
+      );
+
+      await transaction.commit();
+      return updatedUser;
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+
+  static async remove(id, currentUser) {
+    const transaction = await db.sequelize.transaction();
+
+    try {
+      if (currentUser.id === id) {
+        throw new ValidationError('iam.errors.deletingHimself');
+      }
+
+      if (currentUser.app_role?.name !== config.roles.admin) {
+        throw new ValidationError('errors.forbidden.message');
+      }
+
+      await UsersDBApi.remove(id, {
+        currentUser,
+        transaction,
+      });
+
+      await transaction.commit();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
+};

frontend/.eslintrc.cjs

@@ -0,0 +1,11 @@
+module.exports = {
+  extends: [
+    'next/core-web-vitals',
+    'eslint-config-prettier',
+    'eslint:recommended',
+    'plugin:@typescript-eslint/recommended',
+  ],
+  parser: '@typescript-eslint/parser',
+  plugins: ['@typescript-eslint'],
+  root: true,
+};

frontend/.prettierrc

@@ -0,0 +1,10 @@
+{
+  "singleQuote": true,
+  "tabWidth": 2,
+  "trailingComma": "all",
+  "quoteProps": "as-needed",
+  "jsxSingleQuote": true,
+  "bracketSpacing": true,
+  "bracketSameLine": false,
+  "arrowParens": "always"
+}

frontend/Dockerfile

@@ -0,0 +1,19 @@
+FROM node:20.15.1-alpine
+
+# Create app directory
+WORKDIR /usr/src/app
+
+# Install app dependencies
+# A wildcard is used to ensure both package.json AND package-lock.json are copied
+# where available (npm@5+)
+COPY package*.json ./
+
+RUN yarn install
+# If you are building your code for production
+# RUN npm ci --only=production
+
+# Bundle app source
+COPY . .
+
+EXPOSE 3000
+CMD [ "yarn", "dev" ]

frontend/LICENSE-justboil

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2019-current JustBoil.me (https://justboil.me)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

frontend/README.md

@@ -0,0 +1,91 @@
+# Student Learner
+
+## This project was generated by Flatlogic Platform.
+
+## Install
+
+`cd` to project's dir and run `npm install`
+
+### Builds
+
+Build are handled by Next.js CLI — [Info](https://nextjs.org/docs/api-reference/cli)
+
+### Hot-reloads for development
+
+```
+npm run dev
+```
+
+### Builds and minifies for production
+
+```
+npm run build
+```
+
+### Exports build for static hosts
+
+```
+npm run export
+```
+
+### Lint
+
+```
+npm run lint
+```
+
+### Format with prettier
+
+```
+npm run format
+```
+
+## Support
+
+For any additional information please refer to [Flatlogic homepage](https://flatlogic.com).
+
+## To start the project with Docker:
+
+### Description:
+
+The project contains the **docker folder** and the `Dockerfile`.
+
+The `Dockerfile` is used to Deploy the project to Google Cloud.
+
+The **docker folder** contains a couple of helper scripts:
+
+- `docker-compose.yml` (all our services: web, backend, db are described here)
+- `start-backend.sh` (starts backend, but only after the database)
+- `wait-for-it.sh` (imported from https://github.com/vishnubob/wait-for-it)
+
+  > To avoid breaking the application, we recommend you don't edit the following files: everything that includes the **docker folder** and `Dokerfile`.
+
+### Run services:
+
+1. Install docker compose (https://docs.docker.com/compose/install/)
+
+2. Move to `docker` folder. All next steps should be done from this folder.
+
+   `cd docker`
+
+3. Make executables from `wait-for-it.sh` and `start-backend.sh`:
+
+   `chmod +x start-backend.sh && chmod +x wait-for-it.sh`
+
+4. Download dependend projects for services.
+
+5. Review the docker-compose.yml file. Make sure that all services have Dockerfiles. Only db service doesn't require a Dockerfile.
+
+6. Make sure you have needed ports (see them in `ports`) available on your local machine.
+
+7. Start services:
+
+   7.1. With an empty database `rm -rf data && docker-compose up`
+
+   7.2. With a stored (from previus runs) database data `docker-compose up`
+
+8. Check http://localhost:3000
+
+9. Stop services:
+
+   9.1. Just press `Ctr+C`

frontend/next-env.d.ts

@@ -0,0 +1,5 @@
+/// <reference types="next" />
+/// <reference types="next/image-types/global" />
+
+// NOTE: This file should not be edited
+// see https://nextjs.org/docs/pages/building-your-application/configuring/typescript for more information.

frontend/next.config.mjs

@@ -0,0 +1,51 @@
+/**
+ * @type {import('next').NextConfig}
+ */
+const output = process.env.NODE_ENV === 'production' ? 'export' : 'standalone';
+const nextConfig = {
+  trailingSlash: true,
+  distDir: 'build',
+  output,
+  basePath: '',
+  swcMinify: false,
+  images: {
+    unoptimized: true,
+    remotePatterns: [
+      {
+        protocol: 'https',
+        hostname: '**',
+      },
+    ],
+  },
+
+  async rewrites() {
+    return [
+      {
+        source: '/home',
+        destination: '/web_pages/home',
+      },
+
+      {
+        source: '/about',
+        destination: '/web_pages/about',
+      },
+
+      {
+        source: '/services',
+        destination: '/web_pages/services',
+      },
+
+      {
+        source: '/contact',
+        destination: '/web_pages/contact',
+      },
+
+      {
+        source: '/faq',
+        destination: '/web_pages/faq',
+      },
+    ];
+  },
+};
+
+export default nextConfig;