/.config/google-chrome/Default/Extensions/jikbjpjgjmmdhcmlagappehlpiljoaop/0.5_0/amazon.js

/* 

 * HTML5ify for Amazon Music

 * Makes Amazon Music preview play in ab <audio> tag instead of Flash

 * Author: Leonard Ehrenfried <leonard.ehrenfried@web.de>

 */



sites.push({

   

  /*

   * Fetches all links that are play buttons

   */

  getAnchors : function(){

    var anchors = document.querySelectorAll(".trackList td.playcol>a");

    if(anchors.length === 0){

      anchors = document.querySelectorAll(".mp3Tracks td.playCol>a");

    }

    return anchors;

  },

  

  /**

   * Attach events to the anchors so that the mu3 file is downloaded

   */

  attachEvents : function(anchors){

    var that = this;



    for (var i = 0; i < anchors.length; ++i) {

      var anchor = anchors[i];

      anchor.addEventListener('click', function(e){

        e.stopPropagation();

        e.preventDefault();

        that.handleClick(e.target);

      }, true);

    }



  },



  handleClick : function(anchor){

    var that = this;

    

    //could be the image that the user clicked on

    if(anchor.tagName.toLowerCase() !== 'a'){

      anchor = anchor.parentNode;

    }



    var xhr = new XMLHttpRequest();

    xhr.open("GET", anchor.href, true);

    xhr.onreadystatechange = function() {

      if (xhr.readyState == 4) {

        that.playPreview(anchor, xhr.responseText);

      }

    };

    xhr.send();

  },

  

  /*

   * Creates a fully configured <audio> tag

   */

  createAudio : function(url){

    var audio = document.createElement("audio");

    audio.controls = true;

    audio.src = url;

    return audio;

  },



  createPauseButton : function(){

    var button = document.createElement("img");

    button.src = chrome.extension.getURL('/pause.png');

    button.style.cursor = 'pointer';

    return button;

  },



  playPreview : function(anchor, url){

    var that = this;



    var audio = this.createAudio(url);

    var pause = this.createPauseButton();



    pause.addEventListener("click", function(){

      audio.pause();

      that.revertPlayButton(anchor, pause);

    }, true);



    audio.addEventListener("stop", function(){

      that.revertPlayButton(anchor, pause);

    });



    audio.play();

    anchor.parentNode.appendChild(pause);

    anchor.style.display = 'none';

  },



  revertPlayButton : function(play, pause){

    play.style.display = 'inline';

    pause.parentNode.removeChild(pause);  

  },



  insertAffiliateCode : function(){

    var affiliateSuffix = "tag=shizzle0a-20&linkCode=ur2&camp=1789&creative=9325";

    if(!window.sessionStorage.getItem("h5-amazon")){

      window.sessionStorage.setItem("h5-amazon", true);

      

      var url = window.location.href;

      

      if(url.indexOf("&") > -1){

        url += "&";

      }

      else{

        url += "?";

      }

      url += affiliateSuffix;



      var xhr = new XMLHttpRequest();

      xhr.open("GET", url, true);

      xhr.send();

    };



  },



  run : function(){

    var anchors = this.getAnchors();

    this.attachEvents(anchors);

    this.insertAffiliateCode();

  },



  shouldRun : function(){

    return (window.location.host.indexOf("amazon.") > -1);

  }

});