95 lines
4.6 KiB
Markdown
95 lines
4.6 KiB
Markdown
# Messages Backend
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## Purpose
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`messages` is the per-organization store of broadcast/announcement messages (subject, body,
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channel, audience). It is a generic-CRUD slice assembled from the shared factories; the backend
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is the source of truth for message records. This is the generic-CRUD slice for the `messages`
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table; the higher-level parent-messaging workflow is documented separately in `communications.md`.
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## Slice Files (by layer)
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- Route: `src/routes/messages.ts` — `createCrudRouter(controller, { permission: 'messages' })`.
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- Controller: `src/api/controllers/messages.controller.ts` — `createCrudController(service, { csvFields })`.
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- Service (BLL): `src/services/messages.ts` — `createCrudService(DbApi, { notFoundCode: 'messagesNotFound' })`.
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- Repository (DAL): `src/db/api/messages.ts` (`MessagesDBApi`) — entity-specific
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`create`/`bulkImport`/`update`/`findBy`/`findAll`; `remove`/`deleteByIds`/`findAllAutocomplete`
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delegate to `db/api/shared/repository.ts`.
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- Model: `src/db/models/messages.ts`.
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- Shared used: CRUD factories (`services/shared/crud-service.ts`,
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`api/controllers/shared/crud-controller.ts`, `api/http/crud-router.ts`), repository helpers
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(`db/api/shared/repository.ts`), `shared/constants/pagination.ts` (`resolvePagination`),
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`db/api/file.ts` (`replaceRelationFiles` for the `attachments` relation).
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## API
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The standard generic-CRUD surface (all under `/api/messages`, JWT + `${METHOD}_MESSAGES`
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permission, all `200`) — see `backend-architecture.md` for the shared contract:
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- `POST /` — body `{ data }`, returns `true`.
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- `POST /bulk-import` — multipart CSV file, returns `true`.
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- `PUT /:id` — body `{ data, id }` (the service reads the id from the **body**, not the path
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param), returns `true`.
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- `DELETE /:id` — returns `true`.
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- `POST /deleteByIds` — body `{ data: string[] }`, returns `true`.
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- `GET /` — query filters, returns `{ rows, count }`; `?filetype=csv` streams a CSV of `csvFields`.
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- `GET /count` — returns `{ rows: [], count }`.
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- `GET /autocomplete` — `?query&limit&offset`, returns `[{ id, label }]` where `label` is
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`subject`.
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- `GET /:id` — returns the record with eager associations (see Data Contract).
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`csvFields`: `id`, `subject`, `body`, `sent_at`.
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## Access Rules
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- JWT required; the whole router is guarded by `checkCrudPermissions('messages')`, deriving
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`READ_MESSAGES` / `CREATE_MESSAGES` / `UPDATE_MESSAGES` / `DELETE_MESSAGES` per HTTP method.
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- Access is granted by role permission or per-user `custom_permissions` (see `permissions.md`).
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## Tenant Scope
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- `findAll` scopes `where.organizationId` to `currentUser.organizationId`; a `globalAccess`
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role clears the org filter (sees all tenants).
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- `create` assigns the organization from `currentUser.organizationId`; `update` only reassigns
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organization for `globalAccess` users (otherwise it stays the caller's org).
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## Data Contract
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Model columns (`paranoid`, soft-delete via `deletedAt`):
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- `id` (UUID PK), `subject`, `body` (TEXT, nullable).
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- `channel` — ENUM `in_app` | `email` | `sms`.
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- `audience` — ENUM `all_org` | `campus` | `class` | `staff` | `students` | `guardians` | `custom`.
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- `sent_at` — DATE.
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- `status` — ENUM `draft` | `scheduled` | `sent` | `failed`.
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- `importHash` (unique), `campusId`, `organizationId`, `sent_byId`, `createdById`, `updatedById`,
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timestamps.
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Associations: `belongsTo` organization, campus, sent_by (users), createdBy/updatedBy (users);
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`hasMany` `message_recipients_message` (message_recipients); `hasMany` file as `attachments`
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(scoped relation). `findBy`/`GET /:id` eager-load `message_recipients_message`, organization,
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campus, sent_by, attachments in a single `Promise.all`.
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List filters (`MessagesFilter`): `id`, `subject`, `body`, `sent_atRange`, `channel`, `audience`,
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`status`, `campus` (id or name, `|`-separated), `sent_by` (id or firstName, `|`-separated),
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`organization`, `createdAtRange`, plus `field`/`sort` ordering and `limit`/`page` pagination.
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## Behavior / Notes
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- `create`/`bulkImport`/`update` manage the `attachments` file relation via
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`FileDBApi.replaceRelationFiles`.
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- `bulkImport` offsets `createdAt` per row by `BULK_IMPORT_TIMESTAMP_STEP_MS` to preserve order.
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- List pagination uses the shared `resolvePagination` defaults (page size 10, capped at 100).
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- Note: `MessagesFilter` accepts an `active` flag the model has no column for; it is currently
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inert (kept for source accuracy).
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## Tests
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None yet.
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## Related
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- Generic-CRUD contract: `backend-architecture.md`; parent-messaging workflow:
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`communications.md`; related slices: `message_recipients`, `campuses`, `file.md`,
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`permissions.md`.
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