implemented frontend including separate message system; started to implement backend

yjs-poll/backend.js

@@ -0,0 +1,28 @@
+import { WebSocketServer } from 'ws';
+
+// Create a WebSocket server
+const WS_PORT = 8080;
+const wss = new WebSocketServer({ port: WS_PORT });
+
+console.log('WebSocket server is running on ws://localhost:' + String(WS_PORT));
+
+// Connection event handler
+wss.on('connection', (ws) => {
+  console.log('Client connected');
+
+  // Message event handler
+  ws.on('message', (message) => {
+    let msg_str = String(message);
+    console.log("Received: " + msg_str);
+    
+    // If this is a text or state message (no Yjs logic) - echo the message back to the client
+    if (msg_str.startsWith("TEXT_MESSAGE") | msg_str.startsWith("STATE_MESSAGE")) {
+      ws.send(msg_str);
+    }
+  });
+
+  // Close event handler
+  ws.on('close', () => {
+    console.log('Client disconnected');
+  });
+});