FEAT: Adicionado configuraçãoes de pausa e presença

src/modules/admin/admin.module.ts

@@ -3,11 +3,14 @@ import { AdminAccessController } from './admin-access.controller';
 import { AdminAccessService } from './admin-access.service';
 import { AgentNotesController } from './agent-notes.controller';
 import { AgentNotesService } from './agent-notes.service';
+import { AgentPresenceController } from './agent-presence.controller';
+import { AgentPresenceService } from './agent-presence.service';
 import { CustomerContactsController } from './customer-contacts.controller';
 import { CustomerContactsService } from './customer-contacts.service';
 
 @Module({
-  controllers: [AdminAccessController, AgentNotesController, CustomerContactsController],
+  controllers: [AdminAccessController, AgentNotesController, AgentPresenceController, CustomerContactsController],
-  providers: [AdminAccessService, AgentNotesService, CustomerContactsService],
+  providers: [AdminAccessService, AgentNotesService, AgentPresenceService, CustomerContactsService],
+  exports: [AgentPresenceService],
 })
 export class AdminModule {}

src/modules/admin/agent-presence.controller.ts

@@ -0,0 +1,32 @@
+import { Body, Controller, Get, Post, Query } from '@nestjs/common';
+import { AgentPresenceService } from './agent-presence.service';
+
+@Controller('agent/presence')
+export class AgentPresenceController {
+  constructor(private readonly agentPresenceService: AgentPresenceService) {}
+
+  @Get()
+  listPresence() {
+    return this.agentPresenceService.listPresence();
+  }
+
+  @Get('me')
+  getPresence(@Query('userId') userId: string) {
+    return this.agentPresenceService.getPresence(Number(userId));
+  }
+
+  @Post('pause')
+  pause(@Body() body: { userId: number }) {
+    return this.agentPresenceService.pause(Number(body.userId));
+  }
+
+  @Post('resume')
+  resume(@Body() body: { userId: number }) {
+    return this.agentPresenceService.resume(Number(body.userId));
+  }
+
+  @Post('offline')
+  offline(@Body() body: { userId: number }) {
+    return this.agentPresenceService.offline(Number(body.userId));
+  }
+}

src/modules/admin/agent-presence.service.ts

@@ -0,0 +1,260 @@
+import { BadRequestException, Injectable, OnModuleInit } from '@nestjs/common';
+import { DatabaseService } from '../../infra/database/database.service';
+
+type AgentPresenceStatus = 'available' | 'paused' | 'offline';
+
+@Injectable()
+export class AgentPresenceService implements OnModuleInit {
+  constructor(private readonly database: DatabaseService) {}
+
+  async onModuleInit() {
+    await this.ensureSchema();
+  }
+
+  async ensureSchema() {
+    await this.database.query(`
+      CREATE TABLE IF NOT EXISTS agent_presence (
+        user_id INTEGER PRIMARY KEY REFERENCES usuarios(id) ON DELETE CASCADE,
+        status VARCHAR(40) NOT NULL DEFAULT 'offline',
+        paused_at TIMESTAMP WITH TIME ZONE,
+        last_seen_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
+        updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
+      );
+    `);
+
+    await this.database.query(`
+      ALTER TABLE whatsapp_chat_atribuicoes
+        ADD COLUMN IF NOT EXISTS reserved_user_id INTEGER REFERENCES usuarios(id) ON DELETE SET NULL,
+        ADD COLUMN IF NOT EXISTS reserved_at TIMESTAMP WITH TIME ZONE,
+        ADD COLUMN IF NOT EXISTS pause_released_at TIMESTAMP WITH TIME ZONE;
+    `);
+  }
+
+  async listPresence() {
+    const result = await this.database.query(`
+      SELECT
+        u.id AS user_id,
+        u.nome,
+        u.email,
+        COALESCE(ap.status, 'offline') AS status,
+        ap.paused_at,
+        ap.last_seen_at,
+        ap.updated_at,
+        CASE
+          WHEN ap.status = 'paused' AND ap.paused_at IS NOT NULL
+            THEN FLOOR(EXTRACT(EPOCH FROM (CURRENT_TIMESTAMP - ap.paused_at)))::INTEGER
+          ELSE 0
+        END AS paused_seconds,
+        COUNT(DISTINCT assigned.chat_id)::INTEGER AS assigned_count,
+        COUNT(DISTINCT reserved.chat_id)::INTEGER AS reserved_count
+      FROM usuarios u
+      LEFT JOIN agent_presence ap ON ap.user_id = u.id
+      LEFT JOIN whatsapp_chat_atribuicoes assigned
+        ON assigned.user_id = u.id
+       AND assigned.status = 'assigned'
+      LEFT JOIN whatsapp_chat_atribuicoes reserved
+        ON reserved.reserved_user_id = u.id
+       AND reserved.status = 'queued'
+       AND reserved.user_id IS NULL
+      WHERE u.ativo = TRUE
+      GROUP BY u.id, u.nome, u.email, ap.status, ap.paused_at, ap.last_seen_at, ap.updated_at
+      ORDER BY u.nome ASC
+    `);
+
+    return result.rows;
+  }
+
+  async getPresence(userId: number) {
+    this.assertUserId(userId);
+    await this.touchPresence(userId, 'available', false);
+
+    const result = await this.database.query(
+      `
+        SELECT
+          user_id,
+          status,
+          paused_at,
+          last_seen_at,
+          updated_at,
+          CASE
+            WHEN status = 'paused' AND paused_at IS NOT NULL
+              THEN FLOOR(EXTRACT(EPOCH FROM (CURRENT_TIMESTAMP - paused_at)))::INTEGER
+            ELSE 0
+          END AS paused_seconds
+        FROM agent_presence
+        WHERE user_id = $1
+      `,
+      [userId],
+    );
+
+    return result.rows[0];
+  }
+
+  async pause(userId: number) {
+    this.assertUserId(userId);
+
+    return this.database.transaction(async (client) => {
+      const presence = await client.query(
+        `
+          INSERT INTO agent_presence (user_id, status, paused_at, last_seen_at, updated_at)
+          VALUES ($1, 'paused', CURRENT_TIMESTAMP, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
+          ON CONFLICT (user_id) DO UPDATE SET
+            status = 'paused',
+            paused_at = COALESCE(agent_presence.paused_at, CURRENT_TIMESTAMP),
+            last_seen_at = CURRENT_TIMESTAMP,
+            updated_at = CURRENT_TIMESTAMP
+          RETURNING *
+        `,
+        [userId],
+      );
+
+      const released = await client.query(
+        `
+          UPDATE whatsapp_chat_atribuicoes
+          SET
+            reserved_user_id = $1,
+            reserved_at = CURRENT_TIMESTAMP,
+            pause_released_at = CURRENT_TIMESTAMP,
+            user_id = NULL,
+            status = 'queued',
+            updated_at = CURRENT_TIMESTAMP
+          WHERE user_id = $1
+            AND status = 'assigned'
+          RETURNING *
+        `,
+        [userId],
+      );
+
+      return {
+        presence: presence.rows[0],
+        releasedCount: released.rowCount,
+        releasedChats: released.rows,
+      };
+    });
+  }
+
+  async resume(userId: number) {
+    this.assertUserId(userId);
+
+    return this.database.transaction(async (client) => {
+      const presence = await client.query(
+        `
+          INSERT INTO agent_presence (user_id, status, paused_at, last_seen_at, updated_at)
+          VALUES ($1, 'available', NULL, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
+          ON CONFLICT (user_id) DO UPDATE SET
+            status = 'available',
+            paused_at = NULL,
+            last_seen_at = CURRENT_TIMESTAMP,
+            updated_at = CURRENT_TIMESTAMP
+          RETURNING *
+        `,
+        [userId],
+      );
+
+      const restored = await client.query(
+        `
+          UPDATE whatsapp_chat_atribuicoes
+          SET
+            user_id = $1,
+            status = 'assigned',
+            assigned_at = CURRENT_TIMESTAMP,
+            reserved_user_id = NULL,
+            reserved_at = NULL,
+            pause_released_at = NULL,
+            updated_at = CURRENT_TIMESTAMP
+          WHERE reserved_user_id = $1
+            AND status = 'queued'
+            AND user_id IS NULL
+          RETURNING *
+        `,
+        [userId],
+      );
+
+      return {
+        presence: presence.rows[0],
+        restoredCount: restored.rowCount,
+        restoredChats: restored.rows,
+      };
+    });
+  }
+
+  async offline(userId: number) {
+    this.assertUserId(userId);
+
+    return this.database.transaction(async (client) => {
+      const presence = await client.query(
+        `
+          INSERT INTO agent_presence (user_id, status, paused_at, last_seen_at, updated_at)
+          VALUES ($1, 'offline', NULL, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
+          ON CONFLICT (user_id) DO UPDATE SET
+            status = 'offline',
+            paused_at = NULL,
+            last_seen_at = CURRENT_TIMESTAMP,
+            updated_at = CURRENT_TIMESTAMP
+          RETURNING *
+        `,
+        [userId],
+      );
+
+      const released = await client.query(
+        `
+          UPDATE whatsapp_chat_atribuicoes
+          SET
+            user_id = NULL,
+            status = 'queued',
+            reserved_user_id = NULL,
+            reserved_at = NULL,
+            pause_released_at = NULL,
+            updated_at = CURRENT_TIMESTAMP
+          WHERE (user_id = $1 OR reserved_user_id = $1)
+            AND status IN ('assigned', 'queued')
+          RETURNING *
+        `,
+        [userId],
+      );
+
+      return {
+        presence: presence.rows[0],
+        releasedCount: released.rowCount,
+        releasedChats: released.rows,
+      };
+    });
+  }
+
+  async isAvailable(userId: number) {
+    this.assertUserId(userId);
+    const result = await this.database.query<{ status: AgentPresenceStatus }>(
+      `
+        SELECT COALESCE(ap.status, 'offline') AS status
+        FROM usuarios u
+        LEFT JOIN agent_presence ap ON ap.user_id = u.id
+        WHERE u.id = $1
+          AND u.ativo = TRUE
+        LIMIT 1
+      `,
+      [userId],
+    );
+
+    return result.rows[0]?.status === 'available';
+  }
+
+  private async touchPresence(userId: number, fallbackStatus: AgentPresenceStatus, updateStatus = true) {
+    await this.database.query(
+      `
+        INSERT INTO agent_presence (user_id, status, last_seen_at, updated_at)
+        VALUES ($1, $2, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
+        ON CONFLICT (user_id) DO UPDATE SET
+          status = CASE WHEN $3 THEN EXCLUDED.status ELSE agent_presence.status END,
+          last_seen_at = CURRENT_TIMESTAMP,
+          updated_at = CURRENT_TIMESTAMP
+      `,
+      [userId, fallbackStatus, updateStatus],
+    );
+  }
+
+  private assertUserId(userId: number) {
+    if (!Number.isFinite(userId) || userId <= 0) {
+      throw new BadRequestException('Usuario invalido para controle de presenca.');
+    }
+  }
+}

src/modules/whatsapp/whatsapp-assignment.service.ts

@@ -1,5 +1,6 @@
-import { Injectable, Logger, OnModuleInit } from '@nestjs/common';
+import { BadRequestException, Injectable, Logger, OnModuleInit } from '@nestjs/common';
 import { DatabaseService } from '../../infra/database/database.service';
+import { AgentPresenceService } from '../admin/agent-presence.service';
 
 interface TransferInput {
   chatId: string;
@@ -52,7 +53,10 @@ const SALES_KEYWORDS = [
 export class WhatsappAssignmentService implements OnModuleInit {
   private readonly logger = new Logger(WhatsappAssignmentService.name);
 
-  constructor(private readonly db: DatabaseService) {}
+  constructor(
+    private readonly db: DatabaseService,
+    private readonly agentPresenceService: AgentPresenceService,
+  ) {}
 
   async onModuleInit() {
     await this.ensureSchema();
@@ -75,12 +79,16 @@ export class WhatsappAssignmentService implements OnModuleInit {
         ADD COLUMN IF NOT EXISTS last_routed_message_id VARCHAR(255),
         ADD COLUMN IF NOT EXISTS last_bot_sent_at TIMESTAMP WITH TIME ZONE,
         ADD COLUMN IF NOT EXISTS awaiting_customer_reply BOOLEAN NOT NULL DEFAULT FALSE,
+        ADD COLUMN IF NOT EXISTS reserved_user_id INTEGER REFERENCES usuarios(id) ON DELETE SET NULL,
+        ADD COLUMN IF NOT EXISTS reserved_at TIMESTAMP WITH TIME ZONE,
+        ADD COLUMN IF NOT EXISTS pause_released_at TIMESTAMP WITH TIME ZONE,
         ADD COLUMN IF NOT EXISTS updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP;
     `);
   }
 
   async assignChat(chatId: string, userId: string | number, areaId?: string | number | null) {
     this.logger.log(`Atribuindo chat ${chatId} ao usuario ${userId}`);
+    await this.assertUserCanReceiveAssignment(Number(userId));
 
     const query = `
       INSERT INTO whatsapp_chat_atribuicoes (
@@ -92,6 +100,9 @@ export class WhatsappAssignmentService implements OnModuleInit {
         area_id = COALESCE(EXCLUDED.area_id, whatsapp_chat_atribuicoes.area_id),
         status = 'assigned',
         awaiting_customer_reply = FALSE,
+        reserved_user_id = NULL,
+        reserved_at = NULL,
+        pause_released_at = NULL,
         assigned_at = CURRENT_TIMESTAMP,
         updated_at = CURRENT_TIMESTAMP
       RETURNING *;
@@ -111,6 +122,9 @@ export class WhatsappAssignmentService implements OnModuleInit {
         user_id = NULL,
         area_id = EXCLUDED.area_id,
         status = 'queued',
+        reserved_user_id = NULL,
+        reserved_at = NULL,
+        pause_released_at = NULL,
         conversation_started_at = CASE
           WHEN whatsapp_chat_atribuicoes.expires_at <= CURRENT_TIMESTAMP THEN CURRENT_TIMESTAMP
           ELSE whatsapp_chat_atribuicoes.conversation_started_at
@@ -130,6 +144,10 @@ export class WhatsappAssignmentService implements OnModuleInit {
 
   async transferChat(input: TransferInput) {
     const status = input.userId ? 'assigned' : 'queued';
+    if (input.userId) {
+      await this.assertUserCanReceiveAssignment(input.userId);
+    }
+
     const query = `
       INSERT INTO whatsapp_chat_atribuicoes (
         chat_id, user_id, area_id, status, conversation_started_at, expires_at, transfer_note, assigned_at, updated_at
@@ -140,6 +158,9 @@ export class WhatsappAssignmentService implements OnModuleInit {
         area_id = EXCLUDED.area_id,
         status = EXCLUDED.status,
         transfer_note = EXCLUDED.transfer_note,
+        reserved_user_id = NULL,
+        reserved_at = NULL,
+        pause_released_at = NULL,
         assigned_at = CURRENT_TIMESTAMP,
         updated_at = CURRENT_TIMESTAMP
       RETURNING *;
@@ -181,7 +202,13 @@ export class WhatsappAssignmentService implements OnModuleInit {
     this.logger.log(`Liberando chat ${chatId}`);
     const query = `
       UPDATE whatsapp_chat_atribuicoes
-      SET user_id = NULL, status = 'queued', updated_at = CURRENT_TIMESTAMP
+      SET
+        user_id = NULL,
+        status = 'queued',
+        reserved_user_id = NULL,
+        reserved_at = NULL,
+        pause_released_at = NULL,
+        updated_at = CURRENT_TIMESTAMP
       WHERE chat_id = $1
       RETURNING *;
     `;
@@ -347,6 +374,13 @@ export class WhatsappAssignmentService implements OnModuleInit {
     return this.getAreaByName(targetName);
   }
 
+  private async assertUserCanReceiveAssignment(userId: number) {
+    const canReceive = await this.agentPresenceService.isAvailable(userId);
+    if (!canReceive) {
+      throw new BadRequestException('Usuario indisponivel para receber atendimento.');
+    }
+  }
+
   private async getAreaByName(targetName: string) {
     const result = await this.db.query<{ id: number; nome: string }>(
       `SELECT id, nome FROM areas WHERE nome = $1 LIMIT 1`,

src/modules/whatsapp/whatsapp.module.ts

@@ -3,8 +3,10 @@ import { WhatsappService } from './whatsapp.service';
 import { WhatsappGateway } from './whatsapp.gateway';
 import { WhatsappController } from './whatsapp.controller';
 import { WhatsappAssignmentService } from './whatsapp-assignment.service';
+import { AdminModule } from '../admin/admin.module';
 
 @Module({
+  imports: [AdminModule],
   providers: [WhatsappService, WhatsappGateway, WhatsappAssignmentService],
   controllers: [WhatsappController],
   exports: [WhatsappService, WhatsappAssignmentService],