resubcribe on reconnect

src/app/services/chat/ws-chat-methods.service.ts

@@ -54,6 +54,18 @@ export class WsChatMethodsService {
 
     })()
 
+
+    /**
+     * @description when the phone is in the background for a long time it could disconnects from the socket then the socket reconnects automatically,
+     *  when the connection is lost the subscribe is also lost, so we have to subscribe again when reconnection is establish.
+     */
+    this.WsChatService.registerCallback({
+      type: 'reConnect',
+      funx: ()=>{
+        this.subscribeToRoom()
+      }
+    })
+
   }
 
   openRoom(roomId) {
@@ -116,11 +128,17 @@ export class WsChatMethodsService {
     this.loadingWholeList = false
   }
 
+  /**
+   * @description sort room list by last message date
+   */
   sortRoomList() {
     this._dm = this.sortService.sortDate(this._dm,'_updatedAt').reverse()
     this._group = this.sortService.sortDate(this._group,'_updatedAt').reverse()
   }
 
+  /**
+   * @description subscribe all room
+   */
   subscribeToRoom() {
 
     for (const id in this.dm) {