node-telegram-bot-api/examples/polling.js

/**
 * This example demonstrates using polling.
 * It also demonstrates how you would process and send messages.
 */


const TOKEN = 'YOUR_TELEGRAM_BOT_TOKEN';
const TelegramBot = require('..');
const request = require('request');
const options = {
  polling: true
};
const bot = new TelegramBot(TOKEN, options);


// Matches /photo
bot.onText(/\/photo/, function onPhotoText(msg) {
  // From file path
  const photo = `${__dirname}/../test/data/photo.gif`;
  bot.sendPhoto(msg.chat.id, photo, {
    caption: "I'm a bot!"
  });
});


// Matches /audio
bot.onText(/\/audio/, function onAudioText(msg) {
  // From HTTP request
  const url = 'https://upload.wikimedia.org/wikipedia/commons/c/c8/Example.ogg';
  const audio = request(url);
  bot.sendAudio(msg.chat.id, audio);
});


// Matches /love
bot.onText(/\/love/, function onLoveText(msg) {
  const opts = {
    reply_to_message_id: msg.message_id,
    reply_markup: JSON.stringify({
      keyboard: [
        ['Yes, you are the bot of my life ❤'],
        ['No, sorry there is another one...']
      ]
    })
  };
  bot.sendMessage(msg.chat.id, 'Do you love me?', opts);
});


// Matches /echo [whatever]
bot.onText(/\/echo (.+)/, function onEchoText(msg, match) {
  const resp = match[1];
  bot.sendMessage(msg.chat.id, resp);
});