Phase 4: Support LID identity scheme and fix incoming message parsing

whatsapp-gateway/baileys-client.js

@@ -229,7 +229,34 @@ async function disconnectSession(session_key) {
     }
 }
 
+/**
+ * Send a message using an active session
+ */
+async function sendMessage(session_key, phone, message, mediaUrl = null) {
+    const sock = sessions.get(session_key);
+    if (!sock) {
+        throw new Error(`Session ${session_key} is not active or connected`);
+    }
+
+    let jid = phone.includes('@') ? phone : `${phone}@s.whatsapp.net`;
+    
+    if (mediaUrl) {
+        const ext = mediaUrl.split('.').pop().toLowerCase();
+        if (['jpg', 'jpeg', 'png', 'webp'].includes(ext)) {
+            return await sock.sendMessage(jid, { image: { url: mediaUrl }, caption: message });
+        } else if (['mp4', 'mkv', 'avi'].includes(ext)) {
+            return await sock.sendMessage(jid, { video: { url: mediaUrl }, caption: message });
+        } else {
+            return await sock.sendMessage(jid, { document: { url: mediaUrl }, caption: message, fileName: mediaUrl.split('/').pop() });
+        }
+    }
+    
+    return await sock.sendMessage(jid, { text: message });
+}
+
 module.exports = {
     startSession,
-    disconnectSession
+    disconnectSession,
+    sendMessage
 };
+

whatsapp-gateway/server.js

@@ -20,7 +20,7 @@ for (const p of envPaths) {
 
 const express = require('express');
 const cors = require('cors');
-const { startSession, disconnectSession } = require('./baileys-client');
+const { startSession, disconnectSession, sendMessage } = require('./baileys-client');
 
 const app = express();
 app.use(cors());
@@ -76,6 +76,23 @@ app.post('/api/sessions/disconnect', async (req, res) => {
     }
 });
 
+// Send outbound message
+app.post('/api/messages/send', async (req, res) => {
+    const { session_key, phone, message, media_url } = req.body;
+    
+    if (!session_key || !phone || !message) {
+        return res.status(400).json({ error: 'Missing session_key, phone, or message' });
+    }
+
+    try {
+        const result = await sendMessage(session_key, phone, message, media_url);
+        res.json({ status: 'success', data: result });
+    } catch (err) {
+        console.error(`Error sending message via ${session_key} to ${phone}:`, err);
+        res.status(500).json({ error: err.message || 'Failed to send message' });
+    }
+});
+
 app.listen(PORT, () => {
     console.log(`🚀 Nabeh WhatsApp Gateway running on port ${PORT}`);
 });