This is a WhatsApp Web bot customized. It uses the library whatsapp-web.js and is easy to run.

Clone this repository and do:

npm install

You have to consider that the session file is set in ~/wwbot-session.json by default, but you can change this via environment variables WWBOT_SESSION.

After you can start easily with:

npm start
# Or
WWBOT_SESSION=/home/user/dir/to/session.json npm start

Or if you use pm2 then do:

pm2 start ecosystem.config.js

If you use pm2 you can edit the environment variable and set your preferences. Edit the file ecosystem.config.js:

{
  apps: [
    {
      ...
      env_production: {
        WWBOT_SESSION: '~/wwbot-session.json',
      },
    },
  ],
};

In src/handlers you can add news modules to extend the behavior of the bot. For this, you must define a class that extends from BaseHandler (in src/handler.js) and override the method onMessage(message) where message is a Message object and export it. Example:

const { BaseHandler } = require('../handler');

class Handler extends BaseHandler {
  constructor() {
    super('name-my-handler');
    this.command = '!echo';
  }

  onMessage(message) {
    if (message.body.startsWith(this.command)) {
      const text = message.body.slice(this.command.length, message.body.length);
      message.reply(text);
    }
  }
}

module.exports = Handler;

When the client is running a web server start listening on port defined by PORT environment variable or 3000.

sendMessage:

Example:

curl "http://localhost:3000/sendMessage?chatId=chatid-here&text=ctm"