# Archive & Search Implementation Plan

> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.

**Goal:** Index every ⭐-approved message into Meilisearch and expose a paginated full-text search endpoint on the API.

**Architecture:** A shared `@tower/search` package owns the Meilisearch client factory, index name constant, settings configuration, and document type — consumed by both the worker (indexing) and the API (querying). `handleStarReaction` is extended to return an `ApprovalResult` containing both forward jobs and an `IndexJobData` document. The worker enqueues that document into a BullMQ `tower-index` queue immediately after approval; a processor converts it to a `MeiliDocument` (Unix ms timestamp) and calls `indexMessage`. The NestJS API gets a `SearchModule` with a `GET /search` endpoint that filters by `sourceGroupId` and `tags`.

**Tech Stack:** Meilisearch v1.11 (already in docker-compose), `meilisearch` npm SDK ^0.44.0, BullMQ 5, NestJS 11, `@nestjs/config`, TypeScript 5, Jest 29

---

## File Map

**Create:**
- `packages/search/package.json` — `@tower/search` package manifest
- `packages/search/tsconfig.json` — extends base tsconfig
- `packages/search/jest.config.js` — ts-jest preset
- `packages/search/src/index.ts` — `MeiliDocument`, `MESSAGES_INDEX`, `createMeiliClient`, `configureIndex`, `indexMessage`, `deleteMessage`, re-export `MeiliSearch` type
- `packages/search/src/index.test.ts` — unit tests for all exports
- `apps/worker/src/queues/index.queue.ts` — BullMQ Queue for `IndexJobData`
- `apps/worker/src/queues/index.processor.ts` — Worker that calls `indexMessage`
- `apps/worker/src/queues/index.processor.test.ts` — unit tests
- `apps/api/src/modules/search/search.module.ts`
- `apps/api/src/modules/search/search.service.ts` — wraps Meilisearch, `onModuleInit` calls `configureIndex`
- `apps/api/src/modules/search/search.controller.ts` — `GET /search`
- `apps/api/src/modules/search/search.controller.spec.ts`
- `apps/api/src/modules/search/search.service.spec.ts`

**Modify:**
- `packages/types/src/message.ts` — add `IndexJobData` interface
- `apps/worker/src/core/approval.ts` — new `ApprovalResult` return type; build `indexDoc`
- `apps/worker/src/core/approval.test.ts` — update assertions to `result.forwardJobs` / `result.indexDoc`; add missing mock fields
- `apps/worker/src/main.ts` — create meiliClient + indexQueue + indexWorker; call `configureIndex`; enqueue index jobs after approval
- `apps/worker/package.json` — add `@tower/search: workspace:*`
- `apps/api/package.json` — add `@tower/search: workspace:*`
- `apps/api/src/app.module.ts` — import `SearchModule`

---

### Task 1: Add `IndexJobData` to `@tower/types`

**Files:**
- Modify: `packages/types/src/message.ts`

- [ ] **Step 1: Write the failing test**

Add to end of `packages/types/src/message.ts` — first verify the type compiles by adding a test file. Actually `@tower/types` has no test runner; type correctness is verified at build time. Skip to Step 2.

- [ ] **Step 2: Add `IndexJobData` to `packages/types/src/message.ts`**

Append after the `ForwardJobData` interface (keep every existing line intact):

```typescript
export interface IndexJobData {
  messageId: string;       // DB Message.id (cuid)
  content: string;
  senderName: string | null;
  sourceGroupId: string;   // DB Group.id
  sourceGroupName: string;
  tags: string[];
  platform: string;
  approvedAt: string;      // ISO 8601 — converted to Unix ms in the processor
}
```

- [ ] **Step 3: Build the package to verify no compile errors**

```bash
cd /path/to/tower
pnpm --filter @tower/types build
```

Expected: `dist/` updated, zero errors.

- [ ] **Step 4: Commit**

```bash
git add packages/types/src/message.ts
git commit -m "feat(types): add IndexJobData for Meilisearch indexing"
```

---

### Task 2: Create `packages/search` package

**Files:**
- Create: `packages/search/package.json`
- Create: `packages/search/tsconfig.json`
- Create: `packages/search/jest.config.js`
- Create: `packages/search/src/index.ts`
- Create: `packages/search/src/index.test.ts`

- [ ] **Step 1: Write the failing tests**

Create `packages/search/src/index.test.ts`:

```typescript
import {
  MESSAGES_INDEX,
  configureIndex,
  indexMessage,
  deleteMessage,
  MeiliDocument,
} from './index';

function makeMockClient() {
  const mockUpdateSettings = jest.fn().mockResolvedValue({});
  const mockAddDocuments = jest.fn().mockResolvedValue({});
  const mockDeleteDocument = jest.fn().mockResolvedValue({});
  const mockIndex = jest.fn().mockReturnValue({
    updateSettings: mockUpdateSettings,
    addDocuments: mockAddDocuments,
    deleteDocument: mockDeleteDocument,
  });
  return { client: { index: mockIndex } as any, mockIndex, mockUpdateSettings, mockAddDocuments, mockDeleteDocument };
}

describe('MESSAGES_INDEX', () => {
  it('is the string tower-messages', () => {
    expect(MESSAGES_INDEX).toBe('tower-messages');
  });
});

describe('configureIndex', () => {
  it('sets searchable, filterable, and sortable attributes on the correct index', async () => {
    const { client, mockIndex, mockUpdateSettings } = makeMockClient();
    await configureIndex(client);
    expect(mockIndex).toHaveBeenCalledWith('tower-messages');
    expect(mockUpdateSettings).toHaveBeenCalledWith({
      searchableAttributes: ['content', 'senderName', 'sourceGroupName'],
      filterableAttributes: ['sourceGroupId', 'tags', 'platform'],
      sortableAttributes: ['approvedAt'],
    });
  });
});

describe('indexMessage', () => {
  it('adds the document to the messages index', async () => {
    const { client, mockIndex, mockAddDocuments } = makeMockClient();
    const doc: MeiliDocument = {
      id: 'msg-1',
      content: 'Hello community',
      senderName: 'Alice',
      sourceGroupId: 'grp-1',
      sourceGroupName: 'UP Parivar',
      tags: ['#important'],
      platform: 'whatsapp',
      approvedAt: 1716825600000,
    };
    await indexMessage(client, doc);
    expect(mockIndex).toHaveBeenCalledWith('tower-messages');
    expect(mockAddDocuments).toHaveBeenCalledWith([doc]);
  });
});

describe('deleteMessage', () => {
  it('deletes document by id from the messages index', async () => {
    const { client, mockIndex, mockDeleteDocument } = makeMockClient();
    await deleteMessage(client, 'msg-1');
    expect(mockIndex).toHaveBeenCalledWith('tower-messages');
    expect(mockDeleteDocument).toHaveBeenCalledWith('msg-1');
  });
});
```

- [ ] **Step 2: Create `packages/search/src/index.ts`**

```typescript
import { MeiliSearch } from 'meilisearch';

export { MeiliSearch } from 'meilisearch';

export interface MeiliDocument {
  id: string;              // DB Message.id
  content: string;
  senderName: string;      // empty string when null
  sourceGroupId: string;
  sourceGroupName: string;
  tags: string[];
  platform: string;
  approvedAt: number;      // Unix ms — Meilisearch sorts numbers, not ISO strings
}

export const MESSAGES_INDEX = 'tower-messages';

export function createMeiliClient(url: string, masterKey: string): MeiliSearch {
  return new MeiliSearch({ host: url, apiKey: masterKey });
}

export async function configureIndex(client: MeiliSearch): Promise<void> {
  await client.index(MESSAGES_INDEX).updateSettings({
    searchableAttributes: ['content', 'senderName', 'sourceGroupName'],
    filterableAttributes: ['sourceGroupId', 'tags', 'platform'],
    sortableAttributes: ['approvedAt'],
  });
}

export async function indexMessage(client: MeiliSearch, doc: MeiliDocument): Promise<void> {
  await client.index(MESSAGES_INDEX).addDocuments([doc]);
}

export async function deleteMessage(client: MeiliSearch, id: string): Promise<void> {
  await client.index(MESSAGES_INDEX).deleteDocument(id);
}
```

- [ ] **Step 3: Create `packages/search/package.json`**

```json
{
  "name": "@tower/search",
  "version": "0.0.1",
  "main": "./dist/index.js",
  "types": "./dist/index.d.ts",
  "exports": {
    ".": {
      "types": "./dist/index.d.ts",
      "default": "./dist/index.js"
    }
  },
  "scripts": {
    "build": "tsc",
    "dev": "tsc --watch",
    "test": "jest"
  },
  "dependencies": {
    "meilisearch": "^0.44.0"
  },
  "devDependencies": {
    "@types/jest": "^29.0.0",
    "@types/node": "^22.0.0",
    "jest": "^29.0.0",
    "ts-jest": "^29.0.0",
    "typescript": "^5.7.0"
  }
}
```

- [ ] **Step 4: Create `packages/search/tsconfig.json`**

```json
{
  "extends": "../../tsconfig.base.json",
  "compilerOptions": {
    "outDir": "./dist",
    "rootDir": "./src"
  },
  "include": ["src"]
}
```

- [ ] **Step 5: Create `packages/search/jest.config.js`**

```js
module.exports = {
  preset: 'ts-jest',
  testEnvironment: 'node',
  testMatch: ['**/*.test.ts'],
  rootDir: 'src',
};
```

- [ ] **Step 6: Install dependencies and run tests**

```bash
cd /path/to/tower
pnpm install
pnpm --filter @tower/search test
```

Expected: 4 tests pass (MESSAGES_INDEX, configureIndex, indexMessage, deleteMessage).

- [ ] **Step 7: Build**

```bash
pnpm --filter @tower/search build
```

Expected: `packages/search/dist/` created, zero errors.

- [ ] **Step 8: Commit**

```bash
git add packages/search/
git commit -m "feat(search): add @tower/search package with Meilisearch client and helpers"
```

---

### Task 3: Update `handleStarReaction` to return `ApprovalResult`

**Files:**
- Modify: `apps/worker/src/core/approval.ts`
- Modify: `apps/worker/src/core/approval.test.ts`

The current return type is `ForwardJobData[] | null`. Change it to `ApprovalResult | null` where `ApprovalResult` includes both the forward jobs and the data needed for Meilisearch indexing. This lets `main.ts` index the message without an extra DB query.

- [ ] **Step 1: Update `approval.test.ts` first (TDD — tests fail before change)**

Replace `apps/worker/src/core/approval.test.ts` entirely:

```typescript
import { handleStarReaction } from './approval';
import { NormalizedReaction } from '@tower/types';

function makeReaction(overrides: Partial<NormalizedReaction> = {}): NormalizedReaction {
  return {
    reactorJid: '919876543210@s.whatsapp.net',
    targetMsgId: 'TARGET_MSG_123',
    sourceGroupJid: '120363043312345678@g.us',
    emoji: '⭐',
    accountId: 'acc_1',
    ...overrides,
  };
}

const adminJids = ['919876543210@s.whatsapp.net'];

// Minimal valid message returned by prisma.message.findUnique
function makeMessage(overrides: object = {}) {
  return {
    id: 'msg_1',
    status: 'PENDING',
    approval: null,
    content: 'hello world',
    senderName: 'Alice',
    sourceGroupId: 'grp_1',
    tags: ['#important'],
    platform: 'whatsapp',
    sourceGroup: { name: 'UP Parivar Dallas', syncRoutesFrom: [] },
    ...overrides,
  };
}

function makePrisma(messageOverrides: object = {}, txCount = 1) {
  return {
    message: { findUnique: jest.fn().mockResolvedValue(makeMessage(messageOverrides)) },
    $transaction: jest.fn().mockImplementation(async (fn: any) =>
      fn({
        message: { updateMany: jest.fn().mockResolvedValue({ count: txCount }) },
        approval: { create: jest.fn().mockResolvedValue({}) },
      }),
    ),
  } as any;
}

describe('handleStarReaction', () => {
  it('returns null for non-star emoji', async () => {
    expect(await handleStarReaction(makeReaction({ emoji: '👍' }), adminJids, {} as any)).toBeNull();
  });

  it('returns null when reactor is not an admin', async () => {
    expect(
      await handleStarReaction(makeReaction({ reactorJid: 'stranger@s.whatsapp.net' }), adminJids, {} as any),
    ).toBeNull();
  });

  it('returns null when message not found', async () => {
    const prisma = { message: { findUnique: jest.fn().mockResolvedValue(null) } } as any;
    expect(await handleStarReaction(makeReaction(), adminJids, prisma)).toBeNull();
    expect(prisma.message.findUnique).toHaveBeenCalledWith({
      where: { platform_platformMsgId: { platform: 'whatsapp', platformMsgId: 'TARGET_MSG_123' } },
      include: {
        approval: true,
        sourceGroup: {
          include: { syncRoutesFrom: { where: { isActive: true }, include: { targetGroup: true } } },
        },
      },
    });
  });

  it('returns null when message status is not PENDING', async () => {
    const prisma = {
      message: { findUnique: jest.fn().mockResolvedValue(makeMessage({ status: 'REJECTED' })) },
    } as any;
    expect(await handleStarReaction(makeReaction(), adminJids, prisma)).toBeNull();
  });

  it('returns null when approval record already exists', async () => {
    const prisma = {
      message: {
        findUnique: jest.fn().mockResolvedValue(makeMessage({ status: 'APPROVED', approval: { id: 'appr_1' } })),
      },
    } as any;
    expect(await handleStarReaction(makeReaction(), adminJids, prisma)).toBeNull();
  });

  it('returns null on double-approval race (updateMany count=0)', async () => {
    const result = await handleStarReaction(makeReaction(), adminJids, makePrisma({}, 0));
    expect(result).toBeNull();
  });

  it('returns ApprovalResult with empty forwardJobs and valid indexDoc when no sync routes', async () => {
    const result = await handleStarReaction(makeReaction(), adminJids, makePrisma());
    expect(result).not.toBeNull();
    expect(result!.forwardJobs).toEqual([]);
    expect(result!.indexDoc).toMatchObject({
      messageId: 'msg_1',
      content: 'hello world',
      senderName: 'Alice',
      sourceGroupId: 'grp_1',
      sourceGroupName: 'UP Parivar Dallas',
      tags: ['#important'],
      platform: 'whatsapp',
    });
    expect(result!.indexDoc.approvedAt).toMatch(/^\d{4}-\d{2}-\d{2}T/);
  });

  it('returns ForwardJobData for each active sync route', async () => {
    const prisma = makePrisma({
      content: 'important announcement',
      senderName: 'Bob',
      sourceGroup: {
        name: 'Source Group',
        syncRoutesFrom: [
          { targetGroup: { platformId: '999@g.us', accountId: 'acc_2' } },
          { targetGroup: { platformId: '888@g.us', accountId: null } },
        ],
      },
    });

    const result = await handleStarReaction(makeReaction(), adminJids, prisma);
    expect(result!.forwardJobs).toHaveLength(2);
    expect(result!.forwardJobs[0]).toMatchObject({
      messageId: 'msg_1',
      content: 'important announcement',
      sourceGroupName: 'Source Group',
      senderName: 'Bob',
      toGroupJid: '999@g.us',
      fromAccountId: 'acc_2',
    });
    expect(result!.forwardJobs[1]).toMatchObject({
      toGroupJid: '888@g.us',
      fromAccountId: 'acc_1', // falls back to reaction.accountId
    });
  });
});
```

- [ ] **Step 2: Run tests — expect 2 failures** (the two tests that check `result.forwardJobs` and `result.indexDoc`)

```bash
pnpm --filter @tower/worker test -- --testPathPattern=approval
```

Expected: `FAIL` on the last two tests.

- [ ] **Step 3: Update `apps/worker/src/core/approval.ts`**

```typescript
import { NormalizedReaction, ForwardJobData, IndexJobData } from '@tower/types';

export interface ApprovalResult {
  forwardJobs: ForwardJobData[];
  indexDoc: IndexJobData;
}

export async function handleStarReaction(
  reaction: NormalizedReaction,
  adminJids: string[],
  prisma: any,
): Promise<ApprovalResult | null> {
  if (reaction.emoji !== '⭐') return null;
  if (!adminJids.includes(reaction.reactorJid)) return null;

  const message = await prisma.message.findUnique({
    where: {
      platform_platformMsgId: {
        // TODO: derive platform from NormalizedReaction when multi-platform support is added
        platform: 'whatsapp',
        platformMsgId: reaction.targetMsgId,
      },
    },
    include: {
      approval: true,
      sourceGroup: {
        include: {
          syncRoutesFrom: { where: { isActive: true }, include: { targetGroup: true } },
        },
      },
    },
  });

  if (!message) return null;
  if (message.status !== 'PENDING') return null;
  if (message.approval) return null;

  let approved = false;
  await prisma.$transaction(async (tx: any) => {
    const updated = await tx.message.updateMany({
      where: { id: message.id, status: 'PENDING' },
      data: { status: 'APPROVED' },
    });
    if (updated.count === 0) return;
    approved = true;
    await tx.approval.create({
      data: {
        messageId: message.id,
        adminId: reaction.reactorJid,
        decision: 'APPROVED',
      },
    });
  });

  if (!approved) return null;

  const forwardJobs: ForwardJobData[] = message.sourceGroup.syncRoutesFrom
    .filter((route: any) => route.targetGroup != null)
    .map((route: any) => ({
      messageId: message.id,
      content: message.content,
      sourceGroupName: message.sourceGroup.name,
      senderName: message.senderName ?? undefined,
      toGroupJid: route.targetGroup.platformId,
      fromAccountId: route.targetGroup.accountId ?? reaction.accountId,
    }));

  const indexDoc: IndexJobData = {
    messageId: message.id,
    content: message.content,
    senderName: message.senderName ?? null,
    sourceGroupId: message.sourceGroupId,
    sourceGroupName: message.sourceGroup.name,
    tags: message.tags,
    platform: message.platform,
    approvedAt: new Date().toISOString(),
  };

  return { forwardJobs, indexDoc };
}
```

- [ ] **Step 4: Run tests — all pass**

```bash
pnpm --filter @tower/worker test -- --testPathPattern=approval
```

Expected: 8 tests pass.

- [ ] **Step 5: Commit**

```bash
git add apps/worker/src/core/approval.ts apps/worker/src/core/approval.test.ts
git commit -m "feat(worker): handleStarReaction returns ApprovalResult with indexDoc"
```

---

### Task 4: Worker — index queue, processor, and wire `main.ts`

**Files:**
- Create: `apps/worker/src/queues/index.queue.ts`
- Create: `apps/worker/src/queues/index.processor.ts`
- Create: `apps/worker/src/queues/index.processor.test.ts`
- Modify: `apps/worker/package.json` — add `@tower/search: workspace:*`
- Modify: `apps/worker/src/main.ts` — create meiliClient, configureIndex, indexQueue, indexWorker, update reaction handler, update shutdown

- [ ] **Step 1: Add `@tower/search` to worker dependencies**

Edit `apps/worker/package.json` — add to the `"dependencies"` object:

```json
"@tower/search": "workspace:*"
```

Then install:

```bash
pnpm install
```

- [ ] **Step 2: Write the failing processor test**

Create `apps/worker/src/queues/index.processor.test.ts`:

```typescript
import { processIndexJob } from './index.processor';
import { indexMessage } from '@tower/search';
import { IndexJobData } from '@tower/types';

jest.mock('@tower/search', () => ({
  indexMessage: jest.fn().mockResolvedValue(undefined),
  MESSAGES_INDEX: 'tower-messages',
}));

function makeJob(overrides: Partial<IndexJobData> = {}): IndexJobData {
  return {
    messageId: 'msg-1',
    content: 'hello world',
    senderName: 'Alice',
    sourceGroupId: 'grp-1',
    sourceGroupName: 'UP Parivar',
    tags: ['#important'],
    platform: 'whatsapp',
    approvedAt: '2026-05-27T10:00:00.000Z',
    ...overrides,
  };
}

describe('processIndexJob', () => {
  beforeEach(() => jest.clearAllMocks());

  it('calls indexMessage with MeiliDocument shape', async () => {
    const mockClient = {} as any;
    await processIndexJob(makeJob(), mockClient);
    expect(indexMessage).toHaveBeenCalledWith(mockClient, {
      id: 'msg-1',
      content: 'hello world',
      senderName: 'Alice',
      sourceGroupId: 'grp-1',
      sourceGroupName: 'UP Parivar',
      tags: ['#important'],
      platform: 'whatsapp',
      approvedAt: new Date('2026-05-27T10:00:00.000Z').getTime(),
    });
  });

  it('converts null senderName to empty string', async () => {
    const mockClient = {} as any;
    await processIndexJob(makeJob({ senderName: null }), mockClient);
    expect(indexMessage).toHaveBeenCalledWith(
      mockClient,
      expect.objectContaining({ senderName: '' }),
    );
  });

  it('converts approvedAt ISO string to Unix ms number', async () => {
    const mockClient = {} as any;
    await processIndexJob(makeJob({ approvedAt: '2026-01-01T00:00:00.000Z' }), mockClient);
    expect(indexMessage).toHaveBeenCalledWith(
      mockClient,
      expect.objectContaining({ approvedAt: new Date('2026-01-01T00:00:00.000Z').getTime() }),
    );
  });
});
```

- [ ] **Step 3: Run test — expect failure**

```bash
pnpm --filter @tower/worker test -- --testPathPattern=index.processor
```

Expected: `FAIL` — `Cannot find module './index.processor'`.

- [ ] **Step 4: Create `apps/worker/src/queues/index.queue.ts`**

```typescript
import { Queue } from 'bullmq';
import { IndexJobData } from '@tower/types';
import { parseRedisUrl } from './redis-connection';

export function createIndexQueue(redisUrl: string): Queue<IndexJobData> {
  return new Queue<IndexJobData>('tower-index', { connection: parseRedisUrl(redisUrl) });
}
```

- [ ] **Step 5: Create `apps/worker/src/queues/index.processor.ts`**

```typescript
import { Worker } from 'bullmq';
import { IndexJobData } from '@tower/types';
import { MeiliSearch, MeiliDocument, indexMessage } from '@tower/search';
import { parseRedisUrl } from './redis-connection';

export async function processIndexJob(job: IndexJobData, meiliClient: MeiliSearch): Promise<void> {
  const doc: MeiliDocument = {
    id: job.messageId,
    content: job.content,
    senderName: job.senderName ?? '',
    sourceGroupId: job.sourceGroupId,
    sourceGroupName: job.sourceGroupName,
    tags: job.tags,
    platform: job.platform,
    approvedAt: new Date(job.approvedAt).getTime(),
  };
  await indexMessage(meiliClient, doc);
}

export function createIndexWorker(redisUrl: string, meiliClient: MeiliSearch): Worker<IndexJobData> {
  return new Worker<IndexJobData>(
    'tower-index',
    async (job) => processIndexJob(job.data, meiliClient),
    { connection: parseRedisUrl(redisUrl) },
  );
}
```

- [ ] **Step 6: Run tests — all pass**

```bash
pnpm --filter @tower/worker test -- --testPathPattern=index.processor
```

Expected: 3 tests pass.

- [ ] **Step 7: Update `apps/worker/src/main.ts`**

Replace the entire file with:

```typescript
import { PrismaClient } from '@prisma/client';
import { createLogger } from '@tower/logger';
import { validateEnv } from '@tower/config';
import { createMeiliClient, configureIndex } from '@tower/search';
import { createIngestQueue } from './queues/ingest.queue';
import { createIngestWorker } from './queues/ingest.processor';
import { createForwardQueue } from './queues/forward.queue';
import { createForwardWorker } from './queues/forward.processor';
import { createIndexQueue } from './queues/index.queue';
import { createIndexWorker } from './queues/index.processor';
import { WhatsAppSessionPool } from './whatsapp/session-pool';
import { detectTags, isFlagged } from './whatsapp/tag-detector';
import { syncGroups } from './whatsapp/group-sync';
import { handleStarReaction } from './core/approval';

const logger = createLogger('tower-worker');

async function bootstrap() {
  const env = validateEnv();
  const prisma = new PrismaClient();
  await prisma.$connect();

  const adminJids = env.TOWER_ADMIN_JIDS
    ? env.TOWER_ADMIN_JIDS.split(',').map((j) => j.trim()).filter(Boolean)
    : [];

  const meiliClient = createMeiliClient(env.MEILI_URL, env.MEILI_MASTER_KEY);
  await configureIndex(meiliClient).catch((err) =>
    logger.warn({ err }, 'Failed to configure Meilisearch index — search may be degraded'),
  );

  const ingestQueue = createIngestQueue(env.REDIS_URL);
  const forwardQueue = createForwardQueue(env.REDIS_URL);
  const indexQueue = createIndexQueue(env.REDIS_URL);
  const pool = new WhatsAppSessionPool();

  const ingestWorker = createIngestWorker(env.REDIS_URL, prisma);
  const forwardWorker = createForwardWorker(env.REDIS_URL, pool);
  const indexWorker = createIndexWorker(env.REDIS_URL, meiliClient);

  ingestWorker.on('completed', (job) => logger.info({ jobId: job.id }, 'Ingest job completed'));
  ingestWorker.on('failed', (job, err) => logger.error({ jobId: job?.id, err }, 'Ingest job failed'));
  forwardWorker.on('completed', (job) => logger.info({ jobId: job.id }, 'Forward job completed'));
  forwardWorker.on('failed', (job, err) => logger.error({ jobId: job?.id, err }, 'Forward job failed'));
  indexWorker.on('completed', (job) => logger.info({ jobId: job.id }, 'Index job completed'));
  indexWorker.on('failed', (job, err) => logger.error({ jobId: job?.id, err }, 'Index job failed'));

  const accounts = await prisma.account.findMany({
    where: { status: 'ACTIVE', platform: 'whatsapp' },
  });

  if (accounts.length === 0) {
    logger.warn('No active WhatsApp accounts found — seed one in the Account table (see docs)');
  }

  const groupMaps = new Map<string, Map<string, string>>();

  for (const account of accounts) {
    groupMaps.set(account.id, new Map());

    try {
      await pool.add(
        account.id,
        account.sessionPath,
        async (msg, accountId) => {
          const tags = detectTags(msg.content, msg.senderJid, adminJids);
          if (!isFlagged(tags)) return;

          const groupMap = groupMaps.get(accountId);
          if (!groupMap) {
            logger.error({ accountId }, 'No group map for account — message dropped');
            return;
          }
          const sourceGroupId = groupMap.get(msg.sourceGroupJid);
          if (!sourceGroupId) {
            logger.warn({ jid: msg.sourceGroupJid, accountId }, 'Unknown group — skipping message');
            return;
          }

          await ingestQueue.add(
            'ingest',
            {
              platformMsgId: msg.platformMsgId,
              platform: 'whatsapp',
              accountId,
              sourceGroupId,
              senderJid: msg.senderJid,
              senderName: msg.senderName,
              content: msg.content,
              tags,
            },
            { attempts: 3, backoff: { type: 'exponential', delay: 1000 } },
          );

          logger.info({ platformMsgId: msg.platformMsgId, tags }, 'Message enqueued');
        },
        async (reaction) => {
          const result = await handleStarReaction(reaction, adminJids, prisma);
          if (!result) return;

          const { forwardJobs, indexDoc } = result;

          await indexQueue.add('index', indexDoc, {
            attempts: 3,
            backoff: { type: 'exponential', delay: 1000 },
          });

          for (const job of forwardJobs) {
            await forwardQueue.add('forward', job, {
              attempts: 3,
              backoff: { type: 'exponential', delay: 2000 },
            });
          }

          logger.info(
            { messageId: indexDoc.messageId, forwardCount: forwardJobs.length },
            'Message approved — indexed and forwarded',
          );
        },
        async (groups, accountId) => {
          logger.info({ count: Object.keys(groups).length, accountId }, 'Syncing groups');
          const map = await syncGroups(groups, accountId, prisma);
          groupMaps.set(accountId, map);
        },
      );
    } catch (err) {
      logger.error({ accountId: account.id, err }, 'Failed to start session — skipping account');
    }
  }

  logger.info({ accountCount: accounts.length }, 'Tower worker ready');

  const shutdown = async () => {
    logger.info('Shutting down...');
    await pool.closeAll();
    await ingestWorker.close();
    await forwardWorker.close();
    await indexWorker.close();
    await ingestQueue.close();
    await forwardQueue.close();
    await indexQueue.close();
    await prisma.$disconnect();
    process.exit(0);
  };

  process.on('SIGTERM', shutdown);
  process.on('SIGINT', shutdown);
}

bootstrap().catch((err) => {
  console.error('Worker failed to start', err);
  process.exit(1);
});
```

- [ ] **Step 8: Run all worker tests and build**

```bash
pnpm --filter @tower/worker test
pnpm --filter @tower/worker build
```

Expected: All tests pass (the `approval.test.ts` changes in Task 3 must already be committed), zero build errors.

- [ ] **Step 9: Commit**

```bash
git add apps/worker/src/queues/index.queue.ts \
        apps/worker/src/queues/index.processor.ts \
        apps/worker/src/queues/index.processor.test.ts \
        apps/worker/src/main.ts \
        apps/worker/package.json \
        pnpm-lock.yaml
git commit -m "feat(worker): add index queue and wire Meilisearch indexing after approval"
```

---

### Task 5: API — SearchModule

**Files:**
- Create: `apps/api/src/modules/search/search.module.ts`
- Create: `apps/api/src/modules/search/search.service.ts`
- Create: `apps/api/src/modules/search/search.controller.ts`
- Create: `apps/api/src/modules/search/search.controller.spec.ts`
- Create: `apps/api/src/modules/search/search.service.spec.ts`
- Modify: `apps/api/package.json` — add `@tower/search: workspace:*`
- Modify: `apps/api/src/app.module.ts` — register `SearchModule`

- [ ] **Step 1: Add `@tower/search` to API dependencies**

Edit `apps/api/package.json` — add to `"dependencies"`:

```json
"@tower/search": "workspace:*"
```

Then:

```bash
pnpm install
```

- [ ] **Step 2: Write failing controller spec**

Create `apps/api/src/modules/search/search.controller.spec.ts`:

```typescript
import { Test, TestingModule } from '@nestjs/testing';
import { SearchController } from './search.controller';
import { SearchService } from './search.service';

const mockSearchService = { search: jest.fn() };

describe('SearchController', () => {
  let controller: SearchController;

  beforeEach(async () => {
    jest.clearAllMocks();
    const module: TestingModule = await Test.createTestingModule({
      controllers: [SearchController],
      providers: [{ provide: SearchService, useValue: mockSearchService }],
    }).compile();
    controller = module.get<SearchController>(SearchController);
  });

  it('calls service with all parsed params', async () => {
    mockSearchService.search.mockResolvedValue({ hits: [], total: 0, page: 2, limit: 10, query: 'hello' });
    await controller.search('hello', 'grp-1', 'important,event', '2', '10');
    expect(mockSearchService.search).toHaveBeenCalledWith('hello', 'grp-1', ['important', 'event'], 2, 10);
  });

  it('defaults page to 1 and limit to 20 when not provided', async () => {
    mockSearchService.search.mockResolvedValue({ hits: [], total: 0, page: 1, limit: 20, query: '' });
    await controller.search('');
    expect(mockSearchService.search).toHaveBeenCalledWith('', undefined, undefined, 1, 20);
  });

  it('returns the service result directly', async () => {
    const expected = { hits: [{ id: 'msg-1' }], total: 1, page: 1, limit: 20, query: 'test' };
    mockSearchService.search.mockResolvedValue(expected);
    const result = await controller.search('test');
    expect(result).toEqual(expected);
  });

  it('splits tags on comma and trims whitespace', async () => {
    mockSearchService.search.mockResolvedValue({ hits: [], total: 0, page: 1, limit: 20, query: '' });
    await controller.search('', undefined, ' important , event ');
    expect(mockSearchService.search).toHaveBeenCalledWith('', undefined, ['important', 'event'], 1, 20);
  });
});
```

- [ ] **Step 3: Write failing service spec**

Create `apps/api/src/modules/search/search.service.spec.ts`:

```typescript
import { Test, TestingModule } from '@nestjs/testing';
import { ConfigService } from '@nestjs/config';
import { SearchService } from './search.service';
import * as searchPkg from '@tower/search';

jest.mock('@tower/search', () => ({
  createMeiliClient: jest.fn(),
  configureIndex: jest.fn().mockResolvedValue(undefined),
  MESSAGES_INDEX: 'tower-messages',
}));

describe('SearchService', () => {
  let service: SearchService;
  const mockSearch = jest.fn();
  const mockIndex = jest.fn().mockReturnValue({ search: mockSearch });
  const mockClient = { index: mockIndex };

  beforeEach(async () => {
    jest.clearAllMocks();
    (searchPkg.createMeiliClient as jest.Mock).mockReturnValue(mockClient);

    const module: TestingModule = await Test.createTestingModule({
      providers: [
        SearchService,
        { provide: ConfigService, useValue: { get: jest.fn().mockReturnValue('') } },
      ],
    }).compile();

    service = module.get<SearchService>(SearchService);
    await service.onModuleInit();
  });

  it('calls configureIndex on init', () => {
    expect(searchPkg.configureIndex).toHaveBeenCalledWith(mockClient);
  });

  it('returns hits and total', async () => {
    mockSearch.mockResolvedValue({ hits: [{ id: 'msg-1', content: 'hello' }], totalHits: 1 });
    const result = await service.search('hello');
    expect(result.hits).toHaveLength(1);
    expect(result.total).toBe(1);
    expect(result.query).toBe('hello');
  });

  it('searches with no filter when no groupId or tags', async () => {
    mockSearch.mockResolvedValue({ hits: [], totalHits: 0 });
    await service.search('test');
    expect(mockSearch).toHaveBeenCalledWith('test', expect.objectContaining({ filter: undefined }));
  });

  it('applies sourceGroupId filter', async () => {
    mockSearch.mockResolvedValue({ hits: [], totalHits: 0 });
    await service.search('hello', 'grp-1');
    expect(mockSearch).toHaveBeenCalledWith(
      'hello',
      expect.objectContaining({ filter: 'sourceGroupId = "grp-1"' }),
    );
  });

  it('applies tags filter', async () => {
    mockSearch.mockResolvedValue({ hits: [], totalHits: 0 });
    await service.search('hello', undefined, ['#important']);
    expect(mockSearch).toHaveBeenCalledWith(
      'hello',
      expect.objectContaining({ filter: 'tags = "#important"' }),
    );
  });

  it('combines groupId and tags filters with AND', async () => {
    mockSearch.mockResolvedValue({ hits: [], totalHits: 0 });
    await service.search('hello', 'grp-1', ['#important', '#event']);
    expect(mockSearch).toHaveBeenCalledWith(
      'hello',
      expect.objectContaining({
        filter: 'sourceGroupId = "grp-1" AND tags = "#important" AND tags = "#event"',
      }),
    );
  });

  it('defaults page to 1 and hitsPerPage to 20', async () => {
    mockSearch.mockResolvedValue({ hits: [], totalHits: 0 });
    await service.search('hello');
    expect(mockSearch).toHaveBeenCalledWith(
      'hello',
      expect.objectContaining({ page: 1, hitsPerPage: 20 }),
    );
  });
});
```

- [ ] **Step 4: Run specs — expect failure**

```bash
pnpm --filter @tower/api test
```

Expected: `FAIL` — modules not found.

- [ ] **Step 5: Create `apps/api/src/modules/search/search.service.ts`**

```typescript
import { Injectable, OnModuleInit } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';
import {
  MeiliSearch,
  MeiliDocument,
  MESSAGES_INDEX,
  createMeiliClient,
  configureIndex,
} from '@tower/search';

@Injectable()
export class SearchService implements OnModuleInit {
  private readonly client: MeiliSearch;

  constructor(private readonly config: ConfigService) {
    this.client = createMeiliClient(
      this.config.get('MEILI_URL', 'http://localhost:7700'),
      this.config.get('MEILI_MASTER_KEY', ''),
    );
  }

  async onModuleInit(): Promise<void> {
    await configureIndex(this.client).catch((err) =>
      console.warn('Failed to configure Meilisearch index:', err),
    );
  }

  async search(
    query: string,
    groupId?: string,
    tags?: string[],
    page = 1,
    limit = 20,
  ): Promise<{ hits: MeiliDocument[]; total: number; page: number; limit: number; query: string }> {
    const filters: string[] = [];
    if (groupId) filters.push(`sourceGroupId = "${groupId}"`);
    if (tags?.length) filters.push(...tags.map((t) => `tags = "${t}"`));

    const result = await this.client.index(MESSAGES_INDEX).search(query, {
      filter: filters.length ? filters.join(' AND ') : undefined,
      page,
      hitsPerPage: limit,
      sort: ['approvedAt:desc'],
    });

    return {
      hits: result.hits as MeiliDocument[],
      total: result.totalHits ?? 0,
      page,
      limit,
      query,
    };
  }
}
```

- [ ] **Step 6: Create `apps/api/src/modules/search/search.controller.ts`**

```typescript
import { Controller, Get, Query } from '@nestjs/common';
import { SearchService } from './search.service';

@Controller('search')
export class SearchController {
  constructor(private readonly searchService: SearchService) {}

  @Get()
  search(
    @Query('q') q = '',
    @Query('groupId') groupId?: string,
    @Query('tags') tags?: string,
    @Query('page') page = '1',
    @Query('limit') limit = '20',
  ) {
    const tagList = tags
      ? tags.split(',').map((t) => t.trim()).filter(Boolean)
      : undefined;
    return this.searchService.search(q, groupId, tagList, Number(page), Number(limit));
  }
}
```

- [ ] **Step 7: Create `apps/api/src/modules/search/search.module.ts`**

```typescript
import { Module } from '@nestjs/common';
import { ConfigModule } from '@nestjs/config';
import { SearchController } from './search.controller';
import { SearchService } from './search.service';

@Module({
  imports: [ConfigModule],
  controllers: [SearchController],
  providers: [SearchService],
})
export class SearchModule {}
```

- [ ] **Step 8: Register SearchModule in `apps/api/src/app.module.ts`**

```typescript
import { Module } from '@nestjs/common';
import { ConfigModule } from '@nestjs/config';
import { PrismaModule } from './prisma/prisma.module';
import { HealthModule } from './modules/health/health.module';
import { SearchModule } from './modules/search/search.module';

@Module({
  imports: [
    ConfigModule.forRoot({ isGlobal: true }),
    PrismaModule,
    HealthModule,
    SearchModule,
  ],
})
export class AppModule {}
```

- [ ] **Step 9: Run all API tests and build**

```bash
pnpm --filter @tower/api test
pnpm --filter @tower/api build
```

Expected: All specs pass (health controller + search controller + search service), zero build errors.

- [ ] **Step 10: Commit**

```bash
git add apps/api/src/modules/search/ \
        apps/api/src/app.module.ts \
        apps/api/package.json \
        pnpm-lock.yaml
git commit -m "feat(api): add SearchModule with GET /search endpoint backed by Meilisearch"
```

---

## Self-Review

**Spec coverage:**
- ✅ Approved messages indexed in Meilisearch — Task 4 (index queue + processor)
- ✅ Index stays in sync with approvals — Task 3 wires indexDoc into approval result, Task 4 enqueues it
- ✅ Full-text search endpoint — Task 5 `GET /search`
- ✅ Filterable by group and tags — `SearchService.search` builds Meilisearch filter string
- ✅ Paginated results — `page` + `limit` query params, `hitsPerPage` in Meilisearch query
- ✅ Index configured with correct attributes — `configureIndex` called on both worker startup and API `onModuleInit`
- ✅ Messages indexed even with no sync routes — `main.ts` always enqueues index job regardless of `forwardJobs.length`

**Placeholder scan:** None found. All code steps contain complete implementations.

**Type consistency:**
- `IndexJobData.approvedAt` is `string` (ISO) throughout types and approval.ts
- `MeiliDocument.approvedAt` is `number` (Unix ms) — conversion happens in `processIndexJob`
- `handleStarReaction` returns `ApprovalResult | null` consistently across approval.ts and approval.test.ts
- `result.forwardJobs` and `result.indexDoc` used consistently in tests and main.ts