Google Apps Script Telegram bot parts

TelegramClient.js

function TelegramClient(token) {
  var _token = token;

  this.getURL = function() {
	return "https://api.telegram.org/bot" + _token;
  }

  this.getResponse = function( method, data) {
	var response = UrlFetchApp
      .fetch(
        this.getURL() + '/' + method
        ,{method: "post", payload: data}
      )
	;
    // Logger.log( "Telegram: " + response.getResponseCode());

    return response;
  }

  
  this.getMe = function() {
	return this.getResponse("getMe").getContentText();
  }
  
  
  this.getFile = function(file_id) {
    return this.getResponse("getFile", {file_id: file_id}).getContentText();
  }


  this.setWebhook = function(url) {
	return this.getResponse("setWebhook", {url: url}).getContentText();
  }
  
  
  this.getWebhookInfo = function() {
	return this.getResponse("getWebhookInfo").getContentText();
  }


  this.sendMessage = function(chatId, text, parse_mode) {
    parse_mode = parse_mode || '';
    return this.getResponse("sendMessage", {chat_id: ''+chatId, text: text, parse_mode: parse_mode}).getContentText();
  }
  
  
  this.sendMessageRaw = function(options) {
    return this.getResponse("sendMessage", options).getContentText();
  }


  this.sendPhoto = function(chatId, photo, caption) {
	return this.getResponse("sendPhoto", {chat_id: ''+chatId, photo: photo, caption: caption || ""}).getContentText();
  }


  this.sendDocument = function(chatId, document, caption) {
	return this.getResponse("sendDocument", {chat_id: ''+chatId, document: document, caption: caption || ""}).getContentText();
  }
}