# Telegram Bot API implementation

Current version: *7.9.5*

This package partially implements interaction with Telegram as a bot.

Supported version of Telegram Bot API - 5.6

## Description

This package provides:

- data exchange with Telegram in webhook mode
- work in asynchronous mode
- control of the load on the Telegram Bot API
- prioritization of method calls of Telegram Bot API depending on the type of call
- control of size of the send queue
- preprocessing of received data

## Installation

```sh
npm install vvlad1973-telegram-framework
```

## Usage

```javascript
import TelegramBot from 'vvlad1973-telegram-framework';

/** 
 * Express or any other HTTP/HTTPS service can be used to process 
 * webhook requests
 */
import express from 'express';
import bodyParser from 'body-parser';

let
  chatId = 90844863,
  text = 'Test message',
  token = '2039667923:AAHwlugV92qBNXrn_XrTGaQjFPuCJAtUnfs',
  webhookUrl = 'https://some.url.for.webhook/',
  response;

/** 
 * Creating an instance of TelegramBot
 */
const bot = new TelegramBot(token);

/** 
 * Creating instance of HTTP-server and starting listening
 */
const app = express();
app.use(bodyParser.json());
app.listen(port);

/** 
 * Subscription on POST-queries to HTTP-server
 */
app.post(`/${token}/`, function (request, response) {
    response.sendStatus(200); // Sending response on POST-query ...
    bot.processUpdate(request.body); // ... and start processing received data
});

/** 
 * Subscription on incoming updates from Telegram
 */
bot.on('*', function (userId, chatId, senderData, properties, contents) {
  console.log(`[userId=${userId}] Received update:`);
  console.log(`\t chat=[${JSON.stringify(chatId, 0, '\t')}]`);
  console.log(`\t senderData=[${JSON.stringify(senderData, 0, '\t')}]`);
  console.log(`\t properties=[${JSON.stringify(properties, 0, '\t')}]`);
  console.log(`\t contents=[${JSON.stringify(contents, 0, '\t')}]`);
  
  /**
   * Sending response message
   */
  bot.sendMessage(chatId, 'OK')
    .then(response => {
      console.log(response);
    })
    .catch(error => {
      console.error(error);
    });
});

/**
 * Getting info about bot from Telegram
 */
response = await bot.getMe();
console.log(response);

/**
 * Setting webhook
 */
response = await bot.setWebhook(webhookUrl);
console.log(response);

/**
 * Getting webhook info from Telegram
 */
response = await bot.getWebhookInfo();
console.log(response);

/**
 * Sending a message to Telegram chat
 */
response = await bot.sendMessage(chatId, text);
console.log(response);

```

## Implemented methods

### Bot control methods

- getMe
- getMyCommands
- setMyCommands
- deleteMyCommands

### Webhook control methods

- getWebhookInfo
- setWebhook
- deleteWebhook

### Sending data methods

- sendMessage
- sendPhoto
- sendVideo
- sendVideoNote
- sendAudio
- sendVoice
- sendDocument
- sendAnimation
- forwardMessage
- copyMessage
- answerCallbackQuery
- sendChatAction
- sendSticker
- sendDice
- sendPoll
- sendMediaGroup
- sendContact

### Modifying messages

- editMessageText
- editMessageCaption
- editMessageReplyMarkup
- editMessageMedia
- stopPoll

### Control messages in chat

- deleteMessage
- pinChatMessage
- unpinChatMessage
- unpinAllChatMessages

### Chat manageement

- getChat
- getChatMember
- getChatMemberCount
- getChatAdministrators
- banChatMember
- unbanChatMember
- restrictChatMember
- promoteChatMember
- approveChatJoinRequest
- declineChatJoinRequest

### Getting info

- getFile