var moodle_add_ci_badges = function($) {
    // Silly protection for development purposes.
    var loggedinuser = document.querySelector('meta[name=ajs-remote-user]').getAttribute('content');
    var enabled = ['stronk7', 'dobedobedoh', 'jaked', 'jpataleta', 'abgreeve', 'sarjona', 'tsala', 'sanderbangma', 'timhunt'];
    if (!enabled.includes(loggedinuser)) {
        return;
    }

    // Look for all the anchors to https://ci.moodle.org/view/Testing/job/DEV.*/d+.*
    var anchors = document.querySelectorAll('a[href^="https://ci.moodle.org/view/Testing/job/DEV"]');

    // Filter out all the anchors having children (they may be already images or whatever).
    anchors = Array.from(anchors).filter( function(anchor) {
      return (anchor.children.length === 0);
    });

    // Iterate over the anchors, building the badge element and prepending it to the anchors.
    anchors.forEach(function(anchor, index) {
      // Extract important parts (job name and build number) from the anchor (needed to build the badge src).
      var parts = anchor.href.match(/https:\/\/ci.moodle.org\/view\/Testing\/job\/(DEV[^\/]+)\/(\d+).*/);
      if (parts.length !== 3) {
        return;
      }

      // Create the linked badge, pointing to the same URL and using the Embeddable Build Status images.
      var badge = anchor.cloneNode();

      var image = document.createElement('img');
      image.setAttribute('style', 'vertical-align: middle; height: 1.3em; margin-right: 0.2em;');
      image.setAttribute('src', 'https://ci.moodle.org/buildStatus/icon?job=' +
                         parts[1] + '&build=' + parts[2] + '&subject=CI');

      badge.appendChild(image);
      anchor.before(badge);
    });
};

AJS.toInit(function() {
  moodle_add_ci_badges(AJS.$);
  JIRA.bind(JIRA.Events.ISSUE_REFRESHED, function() {
    moodle_add_ci_badges(AJS.$);
  });
  JIRA.bind(JIRA.Events.NEW_PAGE_ADDED, function() {
    moodle_add_ci_badges(AJS.$);
  });
});