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Picasso11_ / J-O L

// ==UserScript==
// @name         J-O L
// @version      1.0
// @description  printf("Que triomphe la vérité !");
// @author       Picasso11
// @match        https://www.youtube.com/watch*
// @icon         https://yt3.ggpht.com/-tOrZCWIOCsE/AAAAAAAAAAI/AAAAAAAAAAA/p-xeGp7CLiY/s100-c-k-no-mo-rj-c0xffffff/photo.jpg
// ==/UserScript==

var userInfo;
var sentiment;
var userHeader;

setInterval(blueThumb, 100);

function blueThumb() {
  if ((userHeader = document.getElementById('watch7-user-header')) && document.getElementById('yt-masthead-user'))
  {
    userInfo = userHeader.firstElementChild.nextElementSibling;
    channelLink = userInfo.firstElementChild.getAttribute('href');
    if (channelLink == '/channel/UCr_KBt4WXXG3jnrx7jvIdwg' || channelLink == '/channel/UCgye6NFK1IYviBGLqoNK3qA' || channelLink == '/channel/UCQKXTVuOCPBuL5VRGUWqA6g')
    {
      sentiment = document.getElementById('watch8-sentiment-actions');
      span = sentiment.firstElementChild;
      span = span.nextElementSibling;
      span = span.lastElementChild;
      span = span.previousElementSibling;
      span = span.previousElementSibling;
      span = span.previousElementSibling;
      button = span.firstElementChild;
      if (button.className.search('like-button-renderer-like-button-unclicked') == 134)
        button.click();
    }
  }
}