index.js

/*!
 * SaidWhat. A Telegram Bot to archive quotes from legendary moments
 *
 * Copyright (c) 2016 Barış Güler
 * http://hwclass.in
 *
 * Licensed under MIT
 * http://www.opensource.org/licenses/mit-license.php
 *
 *
 * Launch  : January 2016
 * Version : 1.0.0
 * Released: January 23rd, 2016
 */

var TelegramBot = require('node-telegram-bot-api'),
    token = '',
    bot = new TelegramBot(token, {polling: true});

var SaidWhat = (function (quotes) {
  function getQuote (typedName, callback) {
    var currentQuote;
    for (var quoteIndex = 0, len = quotes.quotes.length; quoteIndex < len; quoteIndex++) {
      if (quotes.quotes[quoteIndex]['name'] === typedName) {
        var randomQuoteIndex = Math.floor((Math.random() * quotes.quotes[quoteIndex]['quotes'].length - 1) + 1);
        currentQuote = quotes.quotes[quoteIndex]['quotes'][randomQuoteIndex];
      }
    }
    callback(currentQuote);
  };
  return {
    get : getQuote
  }
})(JSON.parse(JSON.stringify(require('./data/quotes.json'))));

bot.onText(/\/saidwhat (.+)/, function (msg, match) {
  var fromId = msg.from.id,
      resp = null; 
  SaidWhat.get(match[1], function (quote) {
    resp = quote;
    bot.sendMessage(fromId, resp);
  });
});