added chat streaming

packages/orchestration-service/src/routes/chat.js

@@ -1,5 +1,5 @@
 const { Router } = require('express')
-const { chat } = require('../chat/index');
+const { chat, chatStream } = require('../chat/index');
 const memory = require('../services/memory')
 
 const router = Router();
@@ -22,4 +22,29 @@ router.post('/', async (req, res) => {
     }
 });
 
+router.post('/stream', async (req, res) => {
+    const {sessionId, message} = req.body;
+    if(!sessionId || !message) {
+        return res.status(400).json({
+            error: 'sessionId and message are required'
+        });
+    }
+
+    res.setHeader('Content-Type', 'text/event-stream');
+    res.setHeader('Cache-Control', 'no-cache');
+    res.setHeader('Connection', 'keep-alive');
+    res.flushHeaders();
+
+    try {
+        await chatStream(sessionId, message, (delta) => {
+            res.write(`data: ${JSON.stringify({ text: delta})}\n\n`)
+        })
+        res.write(`data: ${JSON.stringify({done: true})}\n\n`);
+    } catch (err) {
+        res.write(`data: ${JSON.stringify({error: err.message})}\n\n`);
+    } finally {
+        res.end();
+    }
+});
+
 module.exports = router;