Come ospitare bot WhatsApp

npm init -y

npm install whatsapp-web.js qrcode

// Import necessary modules
const { Client } = require("whatsapp-web.js");
const qrcode = require("qrcode");

// Create a new WhatsApp client instance
const client = new Client({
  puppeteer: {
    // Run Chrome in headless mode (without graphical interface)
    headless: true,
    args: [
      // Disable Chrome sandboxing features
      // Required for execution in containerized environments
      "--no-sandbox",
      // Additional sandboxing flag to disable setuid sandbox
      "--disable-setuid-sandbox",
    ],
  },
  // Web version cache configuration
  webVersionCache: {
    // Type "remote" indicates WhatsApp Web version will be fetched from remote URL
    type: "remote",
    // Remote path for WhatsApp Web version
    remotePath: "INSERT_YOUR_URL_HERE",
  },
});

// Event listener for QR Code generation
client.on("qr", async (qr) => {
  // Use qrcode library to generate and save QR Code
  try {
    await qrcode.toFile("./qrcode.png", qr);
    console.log("QR Code generated and saved as qrcode.png");
  } catch (err) {
    console.error("Error generating QR Code:", err);
  }
});

// Event listener for client ready
client.on("ready", () => {
  // Confirmation log when WhatsApp Web session is established
  console.log("WhatsApp client successfully initialized!");
});

// Event listener for created messages
client.on("message_create", (msg) => {
  // Log message content to console
  console.log("Message received:", msg.body);
  
  // Test command implementation
  if (msg.body === "!ping") {
    // Automatic response for ping command
    msg.reply("pong - Bot working correctly!");
  }
});

// Initialize WhatsApp client
client.initialize();