WIP: how to respond to too many users

back/src/Controller/IoSocketController.ts

@@ -163,8 +163,8 @@ export class IoSocketController {
                         let memberTags: string[] = [];
                         let memberTextures: CharacterTexture[] = [];
                         const room = await socketManager.getOrCreateRoom(roomId);
-                        if (room.getUsers().size > MAX_USERS_PER_ROOM) {
-                            res.writeStatus("302").end('Too many users');
+                        if (room.isFull()) {
+                            res.writeStatus("503").end('Too many users');
                             return;
                         }
                         try {

back/src/Controller/MapController.ts

@@ -4,6 +4,7 @@ import {HttpRequest, HttpResponse, TemplatedApp} from "uWebSockets.js";
 import {BaseController} from "./BaseController";
 import {parse} from "query-string";
 import {adminApi} from "../Services/AdminApi";
+import {socketManager} from "../Services/SocketManager";
 
 //todo: delete this
 export class MapController extends BaseController{
@@ -12,6 +13,7 @@ export class MapController extends BaseController{
         super();
         this.App = App;
         this.getMapUrl();
+        this.canConnectToMap();
     }
 
 
@@ -67,4 +69,23 @@ export class MapController extends BaseController{
 
         });
     }
+    
+    canConnectToMap() {
+        this.App.options("/canjoin", (res: HttpResponse, req: HttpRequest) => {
+            this.addCorsHeaders(res);
+
+            res.end();
+        });
+
+        this.App.get("/canjoin", (res: HttpResponse, req: HttpRequest) => {
+            const query = parse(req.getQuery());
+            const roomId = query.roomId as string;
+            const world = socketManager.getWorlds().get(roomId);
+            if (!world) {
+                res.writeStatus('404').end('No room found');
+                return;
+            }
+            res.writeStatus("200").end(world.isFull() ? '1':'0');
+        });
+    }
 }

back/src/Model/GameRoom.ts

@@ -10,6 +10,7 @@ import {ViewportInterface} from "_Model/Websocket/ViewportMessage";
 import {Movable} from "_Model/Movable";
 import {extractDataFromPrivateRoomId, extractRoomSlugPublicRoomId, isRoomAnonymous} from "./RoomIdentifier";
 import {arrayIntersect} from "../Services/ArrayHelper";
+import {MAX_USERS_PER_ROOM} from "_Enum/EnvironmentVariable";
 
 export type ConnectCallback = (user: User, group: Group) => void;
 export type DisconnectCallback = (user: User, group: Group) => void;
@@ -179,6 +180,10 @@ export class GameRoom {
         }
     }
 
+    isFull() : boolean {
+        return this.getUsers().size > MAX_USERS_PER_ROOM;
+    }
+
     /**
      * Makes a user leave a group and closes and destroy the group if the group contains only one remaining person.
      *