add basic socketio to server

src/middleware/checkSocketExists.ts

@@ -0,0 +1,11 @@
+import { Event, Socket } from "socket.io";
+import UnauthorizedRequestException from "../exceptions/unauthorizedRequestException";
+import { SocketMap } from "../storage/socketMap";
+
+export default async (socket: Socket, [event, ...args]: Event, next: any) => {
+  if (SocketMap.exists(socket.id)) {
+    next();
+  } else {
+    next(new UnauthorizedRequestException("not authorized for connection"));
+  }
+};