Füge Countdown-Logik für den Spielstart hinzu und verbessere die Benutzerverwaltung in Lobbys

frontend/dashboard/lobby/scripts/Handler/StartGameHandler.js

@@ -0,0 +1,26 @@
+class StartGameHandler {
+    /**@param {import("../../../../../backend/node_modules/socket.io-client".Socket} socket Autocompletions VSC*/
+    constructor(socket) {
+        this.socket = socket;
+
+        this.countDownText = document.getElementById("countdown");
+
+        this.socket.on("startGame", (data) => { this.startGame(data) });
+        this.socket.on("interruptStart", () => { this.interruptStart() });
+    }
+
+    startGame(data) {
+        document.getElementById("gameStartCountdown").style.display = "block";
+        this.countDownText.innerText = data.currentSecond;
+
+        if(data.needRedirect){
+            window.location.pathname = `/game`;
+        }
+    }
+
+    interruptStart() {
+        document.getElementById("gameStartCountdown").style.display = "none";
+    }
+}
+
+export default StartGameHandler;