Add event emitter

Push RoomDeleted event when creator delets it. React to RoomDeleted event in RoomList.

This enables communication between components that aren't directly related. The emitter could be used to reduce requests sent to the API.

Currently known problems: No type safety.

src/app/components/creator/_dialogs/room-edit/room-edit.component.ts

@@ -9,8 +9,10 @@ import { Router } from '@angular/router';
 import { RoomCreatorPageComponent } from '../../room-creator-page/room-creator-page.component';
 import { DeleteCommentComponent } from '../delete-comment/delete-comment.component';
 import { CommentService } from '../../../../services/http/comment.service';
+import { EventService } from '../../../../services/util/event.service';
 import { CommentExportComponent } from '../comment-export/comment-export.component';
 import { Comment } from '../../../../models/comment';
+import { RoomDeleted } from '../../../../models/messages/room-deleted';
 
 @Component({
   selector: 'app-room-edit',
@@ -29,6 +31,7 @@ export class RoomEditComponent implements OnInit {
               protected roomService: RoomService,
               public router: Router,
               public commentService: CommentService,
+              public eventService: EventService,
               @Inject(MAT_DIALOG_DATA) public data: any) {
   }
 
@@ -69,7 +72,10 @@ export class RoomEditComponent implements OnInit {
     this.translationService.get('room-page.deleted').subscribe(msg => {
       this.notificationService.show(room.name + msg);
     });
-    this.roomService.deleteRoom(room.id).subscribe();
+    this.roomService.deleteRoom(room.id).subscribe(result => {
+      const event = new RoomDeleted(room.id);
+      this.eventService.broadcast(event.type, event.payload);
+    });
     this.dialogRef.close('delete');
     this.router.navigate([`/creator`]);
   }