# Guardians Backend

## Purpose

`guardians` is the per-organization roster of student guardians/contacts, each optionally linked
to a single `student`. It is a generic-CRUD slice assembled from the shared factories; the
backend is the source of truth for guardian records.

## Slice Files (by layer)

- Route: `src/routes/guardians.ts` — `createCrudRouter(controller, { permission: 'guardians' })`.
- Controller: `src/api/controllers/guardians.controller.ts` — `createCrudController(service, { csvFields })`.
- Service (BLL): `src/services/guardians.ts` — `createCrudService(DbApi, { notFoundCode: 'guardiansNotFound' })`.
- Repository (DAL): `src/db/api/guardians.ts` (`GuardiansDBApi`) — entity-specific
  `create`/`bulkImport`/`update`/`findBy`/`findAll`; `remove`/`deleteByIds`/`findAllAutocomplete`
  delegate to `db/api/shared/repository.ts`.
- Model: `src/db/models/guardians.ts`.
- Shared used: CRUD factories (`services/shared/crud-service.ts`,
  `api/controllers/shared/crud-controller.ts`, `api/http/crud-router.ts`), repository helpers
  (`db/api/shared/repository.ts`), `shared/constants/pagination.ts` (`resolvePagination`),
  `shared/constants/database.ts` (`BULK_IMPORT_TIMESTAMP_STEP_MS`), `db/utils.ts` (`Utils`).

## API

The standard generic-CRUD surface (all under `/api/guardians`, JWT + `${METHOD}_GUARDIANS`
permission, all `200`) — see `backend-architecture.md` for the shared contract:

- `POST /` — body `{ data }`, returns `true`.
- `POST /bulk-import` — multipart CSV file, returns `true`.
- `PUT /:id` — body `{ data, id }` (the service reads the id from the **body**, not the path
  param), returns `true`.
- `DELETE /:id` — returns `true`.
- `POST /deleteByIds` — body `{ data: string[] }`, returns `true`.
- `GET /` — query filters, returns `{ rows, count }`; `?filetype=csv` streams a CSV of `csvFields`.
- `GET /count` — returns `{ rows: [], count }`.
- `GET /autocomplete` — `?query&limit&offset`, returns `[{ id, label }]` where `label` is
  `full_name`.
- `GET /:id` — returns the record with eager associations (see Data Contract).

`csvFields`: `id`, `full_name`, `phone`, `email`, `address`.

## Access Rules

- JWT required; the whole router is guarded by `checkCrudPermissions('guardians')`, deriving
  `READ_GUARDIANS` / `CREATE_GUARDIANS` / `UPDATE_GUARDIANS` / `DELETE_GUARDIANS` per HTTP method.
- Access is granted by role permission or per-user `custom_permissions` (see `permissions.md`).

## Tenant Scope

- `findAll` scopes `where.organizationId` to `currentUser.organizationId`; a `globalAccess`
  role clears the org filter (sees all tenants).
- `create` assigns the organization from `currentUser.organizationId`; `update` only reassigns
  organization for `globalAccess` users (otherwise it stays the caller's org), and only when
  `data.organization` is provided.

## Data Contract

Model columns (`paranoid`, soft-delete via `deletedAt`):

- `id` (UUID PK), `full_name`, `phone`, `email`, `address` (TEXT, nullable).
- `relationship` — ENUM `mother` | `father` | `guardian` | `other`.
- `primary_contact` — BOOLEAN, `allowNull: false`, default `false`.
- `importHash` (unique), `organizationId`, `studentId`, `createdById`, `updatedById`, timestamps.

Associations: `belongsTo` organization, student, createdBy/updatedBy (users). `findBy`/`GET /:id`
eager-load organization and student in a single `Promise.all`.

List filters (`GuardiansFilter`): `id`, `full_name`, `phone`, `email`, `address`, `relationship`,
`primary_contact`, `student` (id or `student_number`, `|`-separated), `organization` (id list,
`|`-separated), `createdAtRange`, plus `field`/`sort` ordering and `limit`/`page` pagination.

## Behavior / Notes

- `bulkImport` offsets `createdAt` per row by `BULK_IMPORT_TIMESTAMP_STEP_MS` to preserve order.
- List pagination uses the shared `resolvePagination` defaults (page size 10, capped at 100).
- Note: `GuardiansFilter` accepts an `active` flag and `findAll` filters on an `active` column,
  but the model has no `active` column; this filter is currently inert (kept for source accuracy).

## Tests

None yet.

## Related

- Generic-CRUD contract: `backend-architecture.md`; related slices: `students`, `organizations`,
  `permissions.md`.