client/src/app/core/notification/user-notification-socket.service.ts

   1 import { Injectable } from '@angular/core'
   2 import { environment } from '../../../environments/environment'
   3 import { UserNotification as UserNotificationServer } from '../../../../../shared'
   4 import { Subject } from 'rxjs'
   5 import { AuthService } from '../auth'
   6
   7 export type NotificationEvent = 'new' | 'read' | 'read-all'
   8
   9 @Injectable()
  10 export class UserNotificationSocket {
  11   private notificationSubject = new Subject<{ type: NotificationEvent, notification?: UserNotificationServer }>()
  12
  13   private socket: SocketIOClient.Socket
  14
  15   constructor (
  16     private auth: AuthService
  17   ) {}
  18
  19   dispatch (type: NotificationEvent, notification?: UserNotificationServer) {
  20     this.notificationSubject.next({ type, notification })
  21   }
  22
  23   async getMyNotificationsSocket () {
  24     await this.initSocket()
  25
  26     return this.notificationSubject.asObservable()
  27   }
  28
  29   private async initSocket () {
  30     if (this.socket) return
  31
  32     // FIXME: import('..') returns a struct module, containing a "default" field corresponding to our sanitizeHtml function
  33     const io: typeof import ('socket.io-client') = (await import('socket.io-client') as any).default
  34
  35     this.socket = io(environment.apiUrl + '/user-notifications', {
  36       query: { accessToken: this.auth.getAccessToken() }
  37     })
  38
  39     this.socket.on('new-notification', (n: UserNotificationServer) => this.dispatch('new', n))
  40   }
  41 }