add server code

.gitignore

@@ -0,0 +1,2 @@
+node_modules/
+.env

package-lock.json

@@ -9,7 +9,8 @@
       "version": "1.0.0",
       "license": "MIT",
       "dependencies": {
-        "express": "^5.1.0"
+        "express": "^5.1.0",
+        "ws": "^8.18.2"
       }
     },
     "node_modules/accepts": {
@@ -811,6 +812,27 @@
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
       "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==",
       "license": "ISC"
+    },
+    "node_modules/ws": {
+      "version": "8.18.2",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-8.18.2.tgz",
+      "integrity": "sha512-DMricUmwGZUVr++AEAe2uiVM7UoO9MAVZMDu05UQOaUII0lp+zOzLLU4Xqh/JvTqklB1T4uELaaPBKyjE1r4fQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=10.0.0"
+      },
+      "peerDependencies": {
+        "bufferutil": "^4.0.1",
+        "utf-8-validate": ">=5.0.2"
+      },
+      "peerDependenciesMeta": {
+        "bufferutil": {
+          "optional": true
+        },
+        "utf-8-validate": {
+          "optional": true
+        }
+      }
     }
   }
 }

package.json

@@ -1,7 +1,7 @@
 {
   "name": "ai-tutor-proxy",
   "version": "1.0.0",
-  "main": "index.js",
+  "main": "server.js",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1"
   },
@@ -13,6 +13,7 @@
   "license": "MIT",
   "description": "",
   "dependencies": {
-    "express": "^5.1.0"
+    "express": "^5.1.0",
+    "ws": "^8.18.2"
   }
 }

server.js

@@ -0,0 +1,44 @@
+// server.js
+import express from 'express';
+import { WebSocketServer } from 'ws';
+import { createServer } from 'http';
+import WebSocket from 'ws';
+
+const app = express();
+const server = createServer(app);
+const wss = new WebSocketServer({ server });
+
+const OPENAI_API_KEY = process.env.OPENAI_API_KEY;
+
+wss.on('connection', (clientWs) => {
+  const openaiWs = new WebSocket('wss://api.openai.com/v1/realtime', {
+    headers: {
+      Authorization: `Bearer ${OPENAI_API_KEY}`
+    }
+  });
+
+  openaiWs.on('open', () => {
+    console.log('Connected to OpenAI');
+  });
+
+  // Proxy messages from client to OpenAI
+  clientWs.on('message', (message) => {
+    if (openaiWs.readyState === WebSocket.OPEN) {
+      openaiWs.send(message);
+    }
+  });
+
+  // Proxy messages from OpenAI back to client
+  openaiWs.on('message', (message) => {
+    if (clientWs.readyState === WebSocket.OPEN) {
+      clientWs.send(message);
+    }
+  });
+
+  openaiWs.on('close', () => clientWs.close());
+  clientWs.on('close', () => openaiWs.close());
+});
+
+server.listen(3001, () => {
+  console.log('WebSocket proxy listening on ws://localhost:3001');
+});