Adjust room list so that the getRooms() distinguishes between participant and creator

src/app/room-list/room-list.component.ts

@@ -17,7 +17,8 @@ export class RoomListComponent implements OnInit {
 
   constructor(
     private roomService: RoomService,
-    protected authenticationService: AuthenticationService) {}
+    protected authenticationService: AuthenticationService) {
+  }
 
   ngOnInit() {
     this.getRooms();

src/app/room.service.ts

@@ -21,7 +21,7 @@ export class RoomService extends ErrorHandlingService {
     super();
   }
 
-  getRooms(): Observable<Room[]> {
+  getCreatorRooms(): Observable<Room[]> {
     const url = this.apiBaseUrl + this.roomsUrl + this.findRoomsUrl;
     return this.http.post<Room[]>(url, {
       properties: { ownerId: this.authService.getUser().userId },
@@ -32,6 +32,17 @@ export class RoomService extends ErrorHandlingService {
     );
   }
 
+  getParticipantRooms(): Observable<Room[]> {
+    const url = this.apiBaseUrl + this.roomsUrl + this.findRoomsUrl;
+    return this.http.post<Room[]>(url, {
+      properties: {},
+      externalFilters: { inHistoryOfUserId: this.authService.getUser().userId }
+    }).pipe(
+      tap(_ => ''),
+      catchError(this.handleError('getRooms', []))
+    );
+  }
+
   addRoom(room: Room): Observable<Room> {
     const connectionUrl = this.apiBaseUrl + this.roomsUrl + '/';
     return this.http.post<Room>(connectionUrl, {