feat: working on push notifications journey

src/common/modules/notification/services/notifications.service.ts

@@ -0,0 +1,44 @@
+import { Injectable } from '@nestjs/common';
+import { DeviceService } from '~/auth/services';
+import { PageOptionsRequestDto } from '~/core/dtos';
+import { Notification } from '../entities';
+import { NotificationsRepository } from '../repositories';
+import { FirebaseService } from './firebase.service';
+
+@Injectable()
+export class NotificationsService {
+  constructor(
+    private readonly deviceService: DeviceService,
+    private readonly firebaseService: FirebaseService,
+    private readonly notificationRepository: NotificationsRepository,
+  ) {}
+
+  async sendPushNotification(userId: string, title: string, body: string) {
+    // Get the device tokens for the user
+
+    const tokens = await this.deviceService.getTokens(userId);
+
+    if (!tokens.length) {
+      return;
+    }
+    // Send the notification
+    return this.firebaseService.sendNotification(tokens, title, body);
+  }
+
+  async getNotifications(userId: string, pageOptionsDto: PageOptionsRequestDto) {
+    const [[notifications, count], unreadCount] = await Promise.all([
+      this.notificationRepository.getNotifications(userId, pageOptionsDto),
+      this.notificationRepository.getUnreadNotificationsCount(userId),
+    ]);
+
+    return { notifications, count, unreadCount };
+  }
+
+  createNotification(notification: Partial<Notification>) {
+    return this.notificationRepository.createNotification(notification);
+  }
+
+  markAsRead(userId: string) {
+    return this.notificationRepository.markAsRead(userId);
+  }
+}