Google Apps Script and Telegram bot

Monday, February 17, 2020

1.Overview

2.Setup
2.1 Create Telegram bot
Chat with BotFater to create Telegram bot and get TOKEN (red frame)

2.2 Create Apps Script
Step1: Go to https://script.google.com/ and create new script.
Select "Publish > Deploy as web app" to get web app url

Fill your token and webAppUrl to below script.
Code.gs

var token = "23947923427:kahsdkajsdgsakjdaksjdbkhyjhhd"; // FILL IN YOUR OWN TOKEN
var telegramUrl = "https://api.telegram.org/bot" + token;
var webAppUrl = "https://script.google.com/macros/s/AKfycbxasdhhwuihuip17OHRD7gcajsdhkjasjpSMtKjh2tue40MSHY74/exec"; // FILL IN YOUR GOOGLE WEB APP ADDRESS

function doGet(e) {
  return HtmlService.createHtmlOutput("Hi there");
}


function getMe() {
  var url = telegramUrl + "/getMe";
  var response = UrlFetchApp.fetch(url);
  Logger.log(response.getContentText());
}

function setWebhook() {
  var url = telegramUrl + "/setWebhook?url=" + webAppUrl;
  var response = UrlFetchApp.fetch(url);
  Logger.log(response.getContentText());
}

function sendText(id,text) {
  var url = telegramUrl + "/sendMessage?chat_id=" + id + "&text=" + text;
  var response = UrlFetchApp.fetch(url);
  Logger.log(response.getContentText());
}

function doPost(e) {
  // this is where telegram works
  //console.log(e)
  
  var data = JSON.parse(e.postData.contents);
  var text = data.message.text;
  var id = data.message.chat.id;
  var name = data.message.chat.first_name;
  var answer = "Hi " + name + ", thank you for your comment " + text;
  sendText(id,answer);
}