Fixed bug where you could join the room multiple times

server/src/socket/routes/join_room.ts

@@ -21,14 +21,25 @@ export function JoinRoomHandler(ctx: Context<JoinRoomPayload>) {
     let room: Room;
 
     if (ctx.payload.roomId && !ctx.server.rooms[ctx.payload.roomId]) {
+        // User sent roomId, but room doesn't exist
         room = new Room(ctx.payload.roomId);
         ctx.server.rooms[room.id] = room;
+
     } else if (!ctx.payload.roomId) {
+        // Didn't include RoomID, creating new one
         ctx.payload.roomId = generateSessionToken(12);
         room = new Room(ctx.payload.roomId);
         ctx.server.rooms[room.id] = room;
+
     } else {
+        // RoomId included and room exists, joining...
         room = ctx.server.rooms[ctx.payload.roomId]
+        if (room.hasUser(ctx.user.id)) {
+            return ctx.ws.send(JSON.stringify({
+                "message": "join_room_response",
+                "status": "failed, you are already part of this room",
+            }))
+        }
     }
 
     ctx.user.currentRoom = room;