Serverless Telegram Bot using Google Apps Script

This repository contains scripts for creating a serverless Telegram bot using Google Apps Script. The bot responds to the /start command and can be configured to restrict access to certain users.

The Maker Alif

Table of Contents

• Features
• Prerequisites
• Setup Instructions
  • 1. Create a Telegram Bot
  • 2. Get Your Chat ID
  • 3. Deploy Google Apps Script
  • 4. Set Up Webhook
• Customizing the Bot
• License

Features

• Responds to the /start command.
• Allows only authorized users to interact with the bot.
• Configurable via Google Apps Script.

Prerequisites

• A Telegram account to create a bot.
• Access to Google Apps Script via your Google account.

Setup Instructions

1. Create a Telegram Bot

1. Open Telegram and search for BotFather.

2. Start a chat with BotFather by clicking the Start button or sending /start.

3. Create a new bot by sending the command /newbot.

4. Follow the instructions provided by BotFather:

   • Choose a name for your bot (this can be anything).
   • Choose a username for your bot. The username must be unique and must end with bot (e.g., myawesomebot).

5. After successfully creating the bot, BotFather will send you a message with the bot token:

   Save this bot token as it will be needed for making API requests.

---

2. Get Your Chat ID

Option 1: Using a Web Browser

1. Open the following URL in your web browser, replacing YOUR_BOT_TOKEN with the token you got from BotFather:

   https://api.telegram.org/botYOUR_BOT_TOKEN/getUpdates
   

2. Send a message to your bot from your personal Telegram account or a group where the bot is added.
3. Refresh the URL, and you will see a JSON response. Find the section that looks like this:

   "chat": {
     "id": 123456789,
     "first_name": "YourName",
     "username": "yourusername"
   }

4. The value of id is your chat ID.

3. Deploy Google Apps Script

1. Go to Google Apps Script and create a new project.

2. Replace the default code in the script editor with the contents of kode.gas:

   // CONFIG
   var BOT_TOKEN = "YOUR_BOT_TOKEN"; // Ganti dengan TOKEN BOT Anda
   var USERS = [YOUR_CHAT_ID]; // Ganti dengan CHAT ID yang diizinkan, bisa lebih dari 1
   
   function doGet(e) {
     return HtmlService.createHtmlOutput('<h1>OK</h1>');
   }
   
   function doPost(e) {
     if (e.postData.type == "application/json") {
       let update = JSON.parse(e.postData.contents);
       if (update) {
         handleCommands(update);
         return true;
       }
     }
   }
   
   function handleCommands(update) {
     let chatId = update.message.chat.id;
     let first_name = update.message.chat.first_name;
     let text = update.message.text || '';
   
     if (USERS.includes(chatId)) {
       if (text.startsWith("/start")) {
         sendMessage({
           chat_id: chatId,
           text: `🙋🏽 Halo, ${first_name}!\n\n` +
                 `buatan Alif.\n\n` +
                 `Selamat datang di Bot Anda! Silakan gunakan perintah yang tersedia untuk melanjutkan.`
         });
       } else {
         sendMessage({
           chat_id: chatId,
           text: "❓ Perintah tidak dikenal. Silakan gunakan /start untuk melihat perintah yang tersedia."
         });
       }
     } else {
       sendMessage({
         chat_id: chatId,
         text: "🚫 Anda tidak memiliki akses untuk menggunakan bot ini."
       });
     }
   }
   
   function sendMessage(postdata) {
     var options = {
       'method': 'post',
       'contentType': 'application/json',
       'payload': JSON.stringify(postdata),
       'muteHttpExceptions': true
     };
     UrlFetchApp.fetch('https://api.telegram.org/bot' + BOT_TOKEN + '/sendMessage', options);
   }

3. Create another file in the same project and add the contents of webhook.gs:

   // CONFIGURATION
   var token = "YOUR_BOT_TOKEN"; // Your Telegram bot token
   var url = "YOUR_GOOGLE_APPS_SCRIPT_URL"; // Your Google Apps Script URL
   
   // Function to set the Telegram webhook
   function setWebhook() {
     var apiEndpoint = `https://api.telegram.org/bot${token}/setWebhook?url=${url}`;
   
     try {
       // Make the HTTP request to set the webhook
       var response = UrlFetchApp.fetch(apiEndpoint);
       
       // Log the response to the Logger for debugging
       Logger.log(response.getContentText());
     } catch (error) {
       Logger.log("Error setting webhook: " + error);
     }
   }

4. Set Up Webhook

1. Replace YOUR_BOT_TOKEN and YOUR_GOOGLE_APPS_SCRIPT_URL in webhook.gs with your actual bot token and the URL of your Google Apps Script.
2. Save your project and click on Deploy > New deployment.
3. Select Web app, give it a name, and ensure to set the access to "Anyone".
4. Deploy the web app and copy the provided URL.
5. Run the setWebhook function in webhook.gs to set the webhook for your bot.

Customizing the Bot

• You can customize the message sent to users when they type /start by modifying the text in the sendMessage function inside handleCommands.
• You can add additional commands by extending the handleCommands function.

License

This project is licensed under the MIT License. Feel free to modify and use it as you wish.

Feel free to make any further modifications!