Implement Gemini audio voice note replies

whatsapp-gateway/baileys-client.js

@@ -288,7 +288,7 @@ async function disconnectSession(session_key) {
 /**
  * Send a message using an active session
  */
-async function sendMessage(session_key, phone, message, mediaUrl = null) {
+async function sendMessage(session_key, phone, message, mediaUrl = null, audioBase64 = null) {
     const sock = sessions.get(session_key);
     if (!sock) {
         throw new Error(`Session ${session_key} is not active or connected`);
@@ -296,6 +296,15 @@ async function sendMessage(session_key, phone, message, mediaUrl = null) {
 
     let jid = phone.includes('@') ? phone : `${phone}@s.whatsapp.net`;
     
+    if (audioBase64) {
+        const buffer = Buffer.from(audioBase64, 'base64');
+        return await sock.sendMessage(jid, { 
+            audio: buffer, 
+            mimetype: 'audio/mp4', 
+            ptt: true 
+        });
+    }
+
     if (mediaUrl) {
         const ext = mediaUrl.split('.').pop().toLowerCase();
         if (['jpg', 'jpeg', 'png', 'webp'].includes(ext)) {

whatsapp-gateway/server.js

@@ -83,14 +83,18 @@ app.get('/api/sessions/active', (req, res) => {
 
 // Send outbound message
 app.post('/api/messages/send', async (req, res) => {
-    const { session_key, phone, message, media_url } = req.body;
+    const { session_key, phone, message, media_url, audio } = req.body;
     
-    if (!session_key || !phone || !message) {
-        return res.status(400).json({ error: 'Missing session_key, phone, or message' });
+    if (!session_key || !phone) {
+        return res.status(400).json({ error: 'Missing session_key or phone' });
+    }
+
+    if (!message && !audio) {
+        return res.status(400).json({ error: 'Missing message or audio' });
     }
 
     try {
-        const result = await sendMessage(session_key, phone, message, media_url);
+        const result = await sendMessage(session_key, phone, message, media_url, audio);
         res.json({ status: 'success', data: result });
     } catch (err) {
         console.error(`Error sending message via ${session_key} to ${phone}:`, err);