Introduction to Node Telegram Bot API

The node-telegram-bot-api is a powerful and easy-to-use library for integrating bots with the Telegram messaging app. This library provides dozens of useful APIs that allow developers to create complex bots that can send messages, respond to user input, manage groups, and much more.

Getting Started

First, you need to install the library using NPM:

  npm install node-telegram-bot-api

Creating a Simple Bot

Let’s start by creating a basic bot that echoes any message a user sends:

  const TelegramBot = require('node-telegram-bot-api');
  const token = 'YOUR_TELEGRAM_BOT_TOKEN';
  const bot = new TelegramBot(token, { polling: true });

  bot.on('message', (msg) => {
    const chatId = msg.chat.id;
    bot.sendMessage(chatId, `You said: ${msg.text}`);
  });

Useful API Methods

Send Photo

You can send photos using the sendPhoto method:

  bot.sendPhoto(chatId, 'path/to/photo.jpg')
    .then(() => {
      console.log('Photo sent successfully');
    }).catch((error) => {
      console.error('Error sending photo:', error);
    });

Send Audio

Sending audio messages is just as easy with the sendAudio method:

  bot.sendAudio(chatId, 'path/to/audio.mp3')
    .then(() => {
      console.log('Audio sent successfully');
    }).catch((error) => {
      console.error('Error sending audio:', error);
    });

Send Document

Use the sendDocument method to send files:

  bot.sendDocument(chatId, 'path/to/document.pdf')
    .then(() => {
      console.log('Document sent successfully');
    }).catch((error) => {
      console.error('Error sending document:', error);
    });

Send Location

You can send geographic locations using the sendLocation method:

  bot.sendLocation(chatId, 48.8584, 2.2945)
    .then(() => {
      console.log('Location sent successfully');
    }).catch((error) => {
      console.error('Error sending location:', error);
    });

Example Application

Below is an example of a more complex application that utilizes several API methods:

  const TelegramBot = require('node-telegram-bot-api');
  const token = 'YOUR_TELEGRAM_BOT_TOKEN';
  const bot = new TelegramBot(token, { polling: true });

  bot.onText(/\/start/, (msg) => {
    bot.sendMessage(msg.chat.id, 'Welcome to the bot! Type /help to see available commands.');
  });

  bot.onText(/\/help/, (msg) => {
    bot.sendMessage(msg.chat.id, '/photo - Send a photo\n/audio - Send an audio message\n/location - Send a location');
  });

  bot.onText(/\/photo/, (msg) => {
    bot.sendPhoto(msg.chat.id, 'path/to/photo.jpg');
  });

  bot.onText(/\/audio/, (msg) => {
    bot.sendAudio(msg.chat.id, 'path/to/audio.mp3');
  });

  bot.onText(/\/location/, (msg) => {
    bot.sendLocation(msg.chat.id, 48.8584, 2.2945);
  });

With these examples, you can start building a fully functional bot using the node-telegram-bot-api library, automating your messaging needs and enhancing user interaction on Telegram. Happy coding!

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