1. Keep session alive with ping-pong. 2. Refreshed tests.

backend/dist/ws/index.js

@@ -92,6 +92,12 @@ const createWebSocketServer = (server) => {
         }
         const sessionData = exports.sessions.get(sessionId);
         console.log(`Client connecting to session: ${sessionId}`);
+        // Set up a ping interval to keep the connection alive
+        const pingInterval = setInterval(() => {
+            if (ws.readyState === ws_1.WebSocket.OPEN) {
+                ws.ping();
+            }
+        }, 30000); // Send ping every 30 seconds
         ws.on('message', (message) => __awaiter(void 0, void 0, void 0, function* () {
             const parsedMessage = JSON.parse(message.toString());
             const { type, clientId, payload } = parsedMessage;
@@ -109,6 +115,7 @@ const createWebSocketServer = (server) => {
             yield (0, exports.handleWebSocketMessage)(ws, sessionId, parsedMessage);
         }));
         ws.on('close', () => {
+            clearInterval(pingInterval); // Clear the interval when the connection closes
             let disconnectedClientId = null;
             for (const [clientId, clientWs] of sessionData.clients.entries()) {
                 if (clientWs === ws) {
@@ -154,6 +161,12 @@ const handleWebSocketMessage = (ws, sessionId, parsedMessage) => __awaiter(void
         case 'REGISTER_CLIENT':
             console.log(`Client ${clientId} registered successfully for session ${sessionId}.`);
             break;
+        case 'PING':
+            // Respond to client pings with a pong
+            if (ws.readyState === ws_1.WebSocket.OPEN) {
+                ws.pong();
+            }
+            break;
         case 'SETUP_SESSION':
             if (sessionData.state === SessionState.SETUP) {
                 const { expectedResponses, topic, description } = payload;