// ==UserScript==
// @name         YouTube AutoLike Video
// @namespace    http://rodrigopcampos.com.br/
// @version      0.1
// @description  Auto like videos on YouTube Channel, if referer is http://nullrefer.com/
// @author       Rodrigo Campos <rodrigo@rodrigopcampos.com.br>
// @match        https://www.youtube.com/watch?v=*
// @match        http://www.youtube.com/watch?v=*
// @require http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    console.info('============= Starting Auto-like Videos (YouTube) by Kyko =============');
    var YT_LIKED_VIDEO = false;

    function runScript() {
      if(!YT_LIKED_VIDEO) {
          var oReferrer = document.referrer;

          if(oReferrer.indexOf('nullrefer.com') != -1) {
              console.info('== You came from YTMonster, searching like button ...');
              var element = $('ytd-menu-renderer.ytd-video-primary-info-renderer > div > ytd-toggle-button-renderer');
              //console.info(element);
              element.prev().click();
              YT_LIKED_VIDEO = true;
          }
      }
    }
    setInterval(function(){ runScript(); }, 2000);
})();