session start works

backend/src/routes/sessions.ts

@@ -0,0 +1,22 @@
+import express from 'express';
+import { v4 as uuidv4 } from 'uuid';
+import { sessions, SessionState } from '../ws'; // Import sessions and SessionState from ws/index.ts
+
+const router = express.Router();
+
+router.post('/sessions', (req, res) => {
+    const sessionId = uuidv4();
+    sessions.set(sessionId, {
+        state: SessionState.SETUP,
+        topic: null,
+        expectedResponses: 0,
+        submittedCount: 0,
+        responses: new Map(),
+        clients: new Map(),
+        finalResult: null,
+    });
+    console.log(`New session created: ${sessionId}`);
+    res.status(201).json({ sessionId });
+});
+
+export default router;