// ==UserScript==
// @name         SoundCloud Downloader using local copy of youtube-dl
// @namespace    fke9fgjew89gjwe89
// @version      1
// @description  Download songs from SoundCloud using youtube-dl
// @author       https://greasyfork.org/en/users/432346-fke9fgjew89gjwe89
// @icon         https://a-v2.sndcdn.com/assets/images/sc-icons/ios.png
// @include      /^https:\/\/soundcloud\.com/.*$/
// @grant        none
// @downloadURL none
// ==/UserScript==

(function() {
  "use strict";

  var head = document.getElementsByTagName('head')[0];
  var style = document.createElement('style');
  var css = '.sc-button-directdl{text-indent:19px}.sc-button-directdl::before{background-size:16px 16px;background-image:url(data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMTYiIGhlaWdodD0iMTYiIHZpZXdCb3g9IjAgMCAxNiAxNiIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj48dGl0bGU+UmVjdGFuZ2xlIDMxPC90aXRsZT48cGF0aCBkPSJNMyAxMXYyaDEwdi0ySDN6bTAtN2gxMGwtNSA2LTUtNnptMy0ydjJoNFYySDZ6IiBmaWxsPSIjMjIyIiBmaWxsLXJ1bGU9ImV2ZW5vZGQiLz48L3N2Zz4=);content:"";display:block;position:absolute;background-repeat:no-repeat;background-position:center center;width:20px;height:20px;top:0;bottom:0;margin:auto 0;left:4px}';
  style.setAttribute('type', 'text/css');
  if (style.styleSheet) {
    style.styleSheet.cssText = css;
  } else {
    style.appendChild(document.createTextNode(css));
  }
  head.appendChild(style);

    String.prototype.mapReplace = function(map) {
      var regex = [];
      for (var key in map)
        regex.push(key.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&"));
      return this.replace(new RegExp(regex.join("|"), "g"), function(word) {
        return map[word];
      });
    };
  
    var last_sound_title = "1";
  
    setInterval(function() {
      
      var sound_title = document
        .getElementsByClassName("soundTitle__title")[0]
        .children[0].innerText.mapReplace({
          "&": "&",
          "<": "&lt;",
          ">": "&gt;",
          "'": "&#39;",
          "/": "&#x2F;",
          "`": "&#x60;",
          "=": "&#x3D;",
          '"': "&quot;"
        });

      if (last_sound_title !== sound_title) {
        last_sound_title = sound_title;
        var button_list = document.getElementsByClassName("sc-button-group sc-button-group-medium")[0];

                  var directdl = '<a href="ytdl://' + window.location + '" class="sc-button-directdl sc-button sc-button-medium sc-button-responsive" tabindex="0" aria-haspopup="true" role="button" title="Direct download" aria-label="Direct download">Direct download</a>';

                  button_list.insertAdjacentHTML('beforeend', directdl);

      }
	
      if (document.getElementsByClassName("sound streamContext playing")[0] && !document.getElementsByClassName("sound streamContext playing")[0].querySelector(".sc-button-directdl")) {
        var stuff = document.getElementsByClassName("sound streamContext playing")[0];
		var linksr = stuff.querySelector(".soundTitle__title.sc-link-dark").href;
        console.log(linksr);
        var button_list = stuff.querySelector(".sc-button-group.sc-button-group-small");

                  var directdl = '<a href="ytdl://' + linksr + '" class="sc-button-directdl sc-button sc-button-small sc-button-responsive" tabindex="0" aria-haspopup="true" role="button" title="Direct download" aria-label="Direct download">Direct download</a>';

                  button_list.insertAdjacentHTML('beforeend', directdl);

                  var divs = document.getElementsByClassName("sc-button-directdl");
                  var lastChild = divs[divs.length - 1];
                  
                }
    }, 3 * 1000);
})();