commit before upgrade

src/app/views/chat/chat.component.html

@@ -1,8 +1,14 @@
-<ng-container *ngIf="!isLogged;else elseIfBlock">
+<ng-container *ngIf="!isLogged;else elseIfNeedsInvitationBlock">
   <p>Login for seeing the chat.</p>
 </ng-container>
 
-<ng-template #elseIfBlock>
+<ng-template #elseIfNeedsInvitationBlock>
+    <ng-container *ngIf="needsInvitation | async;else elseIfNeedsToJoinBlock">
+      <p>This chat is private, you need to join the travel to see it.</p>
+    </ng-container>
+</ng-template>
+
+<ng-template #elseIfNeedsToJoinBlock>
     <ng-container *ngIf="!isInRoom;else elseBlock">
       <button mat-raised-button class="btn btn-default" (click)="join()">Join chat</button>
     </ng-container>

src/app/views/chat/chat.component.ts

@@ -72,8 +72,11 @@ export class ChatComponent implements OnInit, AfterViewInit {
     return this.chatService.isInRoom(this.roomId);
   }
 
-  get isInvitedToRoom(): boolean {
-    return this.chatService.isInvitedToRoom(this.roomId);
+  get needsInvitation(): Promise<boolean> {
+    if (this.chatService.isInRoom(this.roomId)) { return new Promise(() => false); }
+
+
+    return this.chatService.roomNeedsInvitation(this.roomId);
   }
 
   get members(): RoomMember[] {