Plugin PositionNotifier into the main application.

back/src/Model/Websocket/JoinRoomMessage.ts

@@ -1,9 +1,11 @@
 import * as tg from "generic-type-guard";
 import {isPointInterface} from "./PointInterface";
+import {isViewport} from "./ViewportMessage";
 
 export const isJoinRoomMessageInterface =
     new tg.IsInterface().withProperties({
         roomId: tg.isString,
         position: isPointInterface,
+        viewport: isViewport
     }).get();
 export type JoinRoomMessageInterface = tg.GuardedType<typeof isJoinRoomMessageInterface>;