140 lines
4.9 KiB
JavaScript
140 lines
4.9 KiB
JavaScript
const express = require('express');
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const { Client, LocalAuth } = require('whatsapp-web.js');
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const qrcode = require('qrcode-terminal');
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const app = express();
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const PORT = process.env.PORT || 5001;
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app.use(express.json());
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// Initialize WhatsApp Web Client with LocalAuth to persist session
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const client = new Client({
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authStrategy: new LocalAuth({
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dataPath: './.wwebjs_auth'
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}),
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puppeteer: {
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headless: true,
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executablePath: process.env.PUPPETEER_EXECUTABLE_PATH || '/usr/bin/chromium-browser',
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args: [
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'--no-sandbox',
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'--disable-setuid-sandbox',
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'--disable-dev-shm-usage',
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'--disable-accelerated-2d-canvas',
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'--disable-gpu',
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'--no-first-run',
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'--disable-extensions',
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'--disable-background-networking',
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'--disable-default-apps',
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'--disable-background-timer-throttling',
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'--disable-renderer-backgrounding',
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'--disable-backgrounding-occluded-windows'
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]
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}
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});
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let isReady = false;
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// Event: QR Code generation
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client.on('qr', (qr) => {
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console.log('\n==================================================================');
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console.log('SCAN THIS QR CODE WITH YOUR WHATSAPP APP TO LOG IN:');
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console.log('==================================================================\n');
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qrcode.generate(qr, { small: true });
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console.log('\n==================================================================');
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console.log('[WhatsApp Bot] QR code generated. Waiting for scan...');
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});
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// Log loading progress
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client.on('loading_screen', (percent, message) => {
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console.log(`[WhatsApp Bot] Loading: ${percent}% - ${message}`);
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});
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client.on('authenticated', () => {
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console.log('[WhatsApp Bot] Authenticated successfully!');
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});
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// Event: Successfully logged in & authenticated
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client.on('ready', () => {
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console.log('\n[WhatsApp Bot] Client is ready and authenticated!');
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isReady = true;
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});
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client.on('auth_failure', (msg) => {
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console.error('[WhatsApp Bot] Authentication failure:', msg);
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});
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client.on('disconnected', (reason) => {
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console.log('[WhatsApp Bot] Client was logged out:', reason);
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isReady = false;
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});
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// HTTP REST Endpoint to send messages
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app.post('/send-message', async (req, res) => {
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if (!isReady) {
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return res.status(503).json({ success: false, error: 'WhatsApp Web client is not ready. Please scan the QR code in the server terminal.' });
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}
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const { to, message } = req.body;
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if (!to || !message) {
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return res.status(400).json({ success: false, error: "Missing 'to' or 'message' fields in JSON payload." });
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}
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try {
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let targetJid = to;
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// 1. Check if 'to' is a WhatsApp group invite link or invite code
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if (to.includes('chat.whatsapp.com') || /^[A-Za-z0-9]{20,24}$/.test(to)) {
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let inviteCode = to;
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if (to.includes('chat.whatsapp.com/')) {
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inviteCode = to.split('chat.whatsapp.com/')[1].split('?')[0].trim();
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}
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console.log(`[WhatsApp Bot] Attempting to join group via invite code: ${inviteCode}`);
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try {
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const groupChatId = await client.acceptInvite(inviteCode);
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targetJid = groupChatId;
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console.log(`[WhatsApp Bot] Successfully joined/resolved group. JID: ${targetJid}`);
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} catch (err) {
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console.warn(`[WhatsApp Bot] Accept invite failed (bot might already be in the group):`, err.message);
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// Fallback: If joining failed, attempt to find by code if we can't join
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return res.status(400).json({ success: false, error: `Failed to join group via invite code: ${err.message}` });
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}
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}
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// 2. Format phone number to standard JID format if it is a plain phone number
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if (!targetJid.includes('@')) {
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// Strip any prefix, plus, space, parentheses, or dashes
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let cleanPhone = targetJid.replace('whatsapp:', '').replace(/[+\s()-]/g, '').trim();
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targetJid = `${cleanPhone}@c.us`;
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}
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console.log(`[WhatsApp Bot] Sending message to target JID: ${targetJid}`);
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const response = await client.sendMessage(targetJid, message);
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res.json({
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success: true,
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messageId: response.id._serialized,
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recipient: targetJid
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});
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} catch (error) {
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console.error(`[WhatsApp Bot] Failed to send message:`, error);
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res.status(500).json({ success: false, error: error.message || error });
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}
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});
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// Health check endpoint
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app.get('/status', (req, res) => {
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res.json({
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service: 'whatsapp-gateway',
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ready: isReady,
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authenticated: client.info ? true : false
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});
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});
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app.listen(PORT, () => {
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console.log(`[WhatsApp Bot Gateway] REST API running at http://localhost:${PORT}`);
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});
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console.log('[WhatsApp Bot] Initializing client...');
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client.initialize();
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