show last messae and date

src/app/module/chat/domain/service/room-last-message.service.ts

@@ -0,0 +1,33 @@
+import { Injectable } from '@angular/core';
+import { filter, map } from 'rxjs/operators';
+import { MessageEntity } from 'src/app/core/chat/entity/message';
+import { IMessageSocketRepository } from 'src/app/core/chat/repository/message/message-socket-repository';
+import { InstanceId } from '../chat-service.service';
+import { IRoomLocalRepository } from 'src/app/core/chat/repository/room/room-local-repository';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class RoomLastMessageService {
+
+  constructor(
+    private MessageSocketRepositoryService: IMessageSocketRepository,
+    private roomLocalRepository: IRoomLocalRepository
+  ) { 
+    this.listenToIncomingMessage()
+  }
+
+  
+  listenToIncomingMessage() {
+    return this.MessageSocketRepositoryService.listenToMessages().pipe(
+      filter((message) => !message?.requestId?.startsWith(InstanceId)),
+      map(message => Object.assign(new MessageEntity(), message))
+    ).subscribe(async (message) => {
+      this.roomLocalRepository.update(message.roomId, {
+        messages: [message]
+      })
+      
+    });
+
+  }
+}