This document discusses how to create Telegram bots using Node.js and the node-telegram-bot-api library. It provides code samples for basic bots that reply with hardcoded responses, as well as more advanced bots like a support bot that allows live chat between users and agents. Links are also included for additional Telegram bot resources.

1. Telegram Bots

2. WHOAMI
Front End Lead @ Rails Reactor
github.com/viattik
twitter.com/vi_attik

3. bots, bots, bots

4. И чо?

5. Creating Bot

6. Creating Bot
var TelegramBot = require('node-telegram-bot-api'),
telegram = new TelegramBot("YOUR_BOT_TOKEN", { polling: true });
telegram.on("text", (message) => {
telegram.sendMessage(message.chat.id, "Hello world");
});

7. Creating Bot
function getReply(text) {
if (text.includes('ничо')) {
return 'Вот и хорошо';
} else if (text.includes('/start')) {
return 'Давай, расскажи мне о своих проблемах.';
} else {
return 'И чо?';
}
}
telegram.on("text", (message) => {
const text = message.text.toLowerCase();
const reply = getReply(text);
telegram.sendMessage(message.chat.id, reply, {
parse_mode: "Markdown"
});
});

9. Support Bot
// Telegram sent message
telegram.on("text", (message) => {
const text = message.text;
const id = message.chat.id;
let chat = chats[id];
if (!chat && text === '/support') {
chats[id] = chat = {
from: message.from,
messages: []
}
} else if (chat && text === '/end_support') {
chats[id] = chat = undefined;
}
if(chat) {
chat.messages.push({ sender: 0, text });
}
syncToBrowser();
});

10. Support Bot
wsServer.on('request', function(request) {
let connection = request.accept(null, request.origin);
connections.push(connection);
connection.sendUTF(JSON.stringify(chats));
// Browser sent message
connection.on('message', function(message) {
const { id, text } = JSON.parse(message.utf8Data);
const chat = chats[id];
if (!chat) { return; }
chat.messages.push({ sender: 1, text });
telegram.sendMessage(id, text);
});
});

11. DEMO
https://youtu.be/1xhgMeV4ZCs

12. Inline Bots

13. Links
https://core.telegram.org/bots
https://telegram.me/botfather
https://github.com/viattik/support-demo-bot
https://medium.com/codeday-by-studentrnd/intro-to-node-js-
making-a-telegram-bot-964b8cfe1129