feat: Implement in-app notifications with new database model, enhance Firebase initialization to support service account files, and add message read functionalities.

src/notifications/notifications.controller.ts

@@ -1,8 +1,12 @@
 import {
   Controller,
+  Get,
   Post,
+  Patch,
   Delete,
   Body,
+  Param,
+  Query,
   UseGuards,
   HttpCode,
   HttpStatus,
@@ -12,6 +16,7 @@ import {
   ApiOperation,
   ApiResponse,
   ApiBearerAuth,
+  ApiQuery,
 } from '@nestjs/swagger';
 import { JwtAuthGuard } from '../auth/guards';
 import { CurrentUser } from '../auth/decorators';
@@ -27,6 +32,63 @@ export class NotificationsController {
     private readonly notificationsService: NotificationsService,
   ) {}
 
+  // ==========================================
+  // IN-APP NOTIFICATIONS
+  // ==========================================
+
+  @Get()
+  @ApiOperation({ summary: 'Get notifications list' })
+  @ApiQuery({ name: 'filter', required: false, enum: ['all', 'unread'] })
+  @ApiQuery({ name: 'page', required: false, type: Number })
+  @ApiQuery({ name: 'limit', required: false, type: Number })
+  @ApiResponse({ status: 200, description: 'Notifications list with pagination' })
+  async getNotifications(
+    @CurrentUser('id') userId: string,
+    @Query('filter') filter?: 'all' | 'unread',
+    @Query('page') page?: string,
+    @Query('limit') limit?: string,
+  ) {
+    return this.notificationsService.getNotifications(
+      userId,
+      filter || 'all',
+      page ? parseInt(page, 10) : 1,
+      limit ? parseInt(limit, 10) : 20,
+    );
+  }
+
+  @Get('unread-count')
+  @ApiOperation({ summary: 'Get unread notification count' })
+  @ApiResponse({ status: 200, description: 'Unread count' })
+  async getUnreadCount(@CurrentUser('id') userId: string) {
+    const count = await this.notificationsService.getUnreadCount(userId);
+    return { unreadCount: count };
+  }
+
+  @Patch(':id/read')
+  @HttpCode(HttpStatus.OK)
+  @ApiOperation({ summary: 'Mark a notification as read' })
+  @ApiResponse({ status: 200, description: 'Notification marked as read' })
+  async markAsRead(
+    @CurrentUser('id') userId: string,
+    @Param('id') notificationId: string,
+  ) {
+    await this.notificationsService.markAsRead(userId, notificationId);
+    return null;
+  }
+
+  @Patch('read-all')
+  @HttpCode(HttpStatus.OK)
+  @ApiOperation({ summary: 'Mark all notifications as read' })
+  @ApiResponse({ status: 200, description: 'All notifications marked as read' })
+  async markAllAsRead(@CurrentUser('id') userId: string) {
+    await this.notificationsService.markAllAsRead(userId);
+    return null;
+  }
+
+  // ==========================================
+  // FCM TOKEN MANAGEMENT
+  // ==========================================
+
   @Post('fcm-token')
   @HttpCode(HttpStatus.OK)
   @ApiOperation({ summary: 'Register FCM token for push notifications' })