Alexez
Алексей Марченко

const { Client,LocalAuth } = require('whatsapp-web.js');
const http = require('http');


const client = new Client({
    authStrategy: new LocalAuth(),
    puppeteer: { headless: false }
});

client.on('qr', (qr) => {
    // Generate and scan this code with your phone
    console.log('QR RECEIVED', qr);
});

client.on('ready', () => {
    console.log('Client is ready!');
});

client.on('message', msg => {
    if (msg.body == '!ping') {
        msg.reply('pong');
    }
      
});


const requestListener = function (req, res) {
  if (req.method == 'POST') {
    
    var body_text = ''
    var number = ''
    req.on('data', function(data) {
        body_text += data
        console.log(body_text)
        const obj = JSON.parse(body_text)
        console.log(obj.phone);
        console.log(obj.body);
        number = obj.phone
        number = number.includes('@c.us') ? number : `${number}@c.us`;
        client.sendMessage(number, obj.body);
    })

    req.on('end', function() {
    res.writeHead(200, {'Content-Type': 'text/html'})
    res.end('ok')
  })


  } else {
    console.log(req.method);
    res.writeHead(200);
    res.end('Hello, World!');
  }

}

const server = http.createServer(requestListener);
server.listen(8080);

client.initialize();