Youtube resolver for tomahawk

youtube-resolver.js

function getSettings()
{
    var settings = new Object();
    settings.name = "Youtube Resolver";
    settings.weight = 50;
    settings.timeout = 5;
    settings.maxResults = 5;

    return settings;
}

function resolve( qid, artist, album, track ){
  
  var validUrlRe = "^((?:https?://)?(?:youtu\.be/|(?:\w+\.)?youtube(?:-nocookie)?\.com/(?:(?:v/)|(?:(?:watch(?:_popup)?(?:\.php)?)?(?:\\?|#!?)(?:.+&)?v=))))?([0-9A-Za-z_-]+)?";
  
  var properties = getSettings();
  
  if(artist !== "" ){
    query = encodeURIComponent(artist) + "+";
  }
  if(track !== "" ){
    query += encodeURIComponent(track);
  }
  var apiQuery = "http://gdata.youtube.com/feeds/api/videos?q="+ query + "&v=2&alt=jsonc&max-results=" + properties.maxResults;
  apiQuery = apiQuery.replace(/\%20/g,'\+');
  
  var myJsonObject = {};
  var httpRequest = new XMLHttpRequest();
  httpRequest.open('GET', apiQuery, false);
  httpRequest.onreadystatechange = function(){
    if (httpRequest.readyState == 4 && httpRequest.status == 200){
      myJsonObject = JSON.parse(httpRequest.responseText);
    }
  }
  httpRequest.send(null);
  
  var syncRequest = function(videoUrl) {
    var xmlHttpRequest = new XMLHttpRequest();
    xmlHttpRequest.open('GET', videoUrl, false);
    xmlHttpRequest.send(null);
    return xmlHttpRequest.responseText;
  }
  
  var decodeurl = function(url) { return unescape(url); /*.replace(/%2C/g, ",").replace(/%20/g, " ").replace(/%3A/g, ":");*/ };

  
  /*var parseVideoUrlFromYtPage = function(html) {
    var magic = "fmt_stream_map=";
    var magicFmt = "18";
    var magicLimit = "%7C";
    var pos = html.indexOf(magic) + magic.length;
    html = html.slice(pos);
    html = html.slice(html.indexOf(magicFmt + magicLimit) + (magic+magicLimit).length);
    finalUrl = html.slice(0, html.indexOf(magicLimit) );
    return "http://" + decodeurl( finalUrl ) + "&format=xml";
    }*/
  
  var process = function(videoPageUrl) {
    var re = new RegExp(validUrlRe);
    var m = re.exec(videoPageUrl);
    var videoId = "";
    if (m == null || m.length <3) {
      //console.log("Invalid URL : " + videoPageUrl);
      return videoId;
    } else {
      videoId = m[2];
      //console.log("Video Id : " + videoId);
    }
    
    var els = ['&el=embedded', '&el=detailpage', '&el=vevo', ''];
    for (x in els) {
        var video_info_url = "http://www.youtube.com/get_video_info?&video_id="+videoId+els[x]+"&ps=default&eurl=&gl=US&hl=en";
        var video_info_webpage = syncRequest(video_info_url);
        
        var queryString = {};
          video_info_webpage.replace(
              new RegExp("([^?=&]+)(=([^&]*))?", "g"),
            function($0, $1, $2, $3) { queryString[$1] = $3; }
        );
        if (queryString['token']){
                break;     
                //console.log('token found');
        }
    }
    //var token = queryString['token'];
    //console.log('token ' + token);
    //console.log('format ' +queryString['fmt_url_map']);
    
    var available_formats = ['38', '37', '22', '45', '35', '34', '43', '18', '6', '5', '17', '13'];
    
    if(queryString['fmt_url_map'] !== 'undefined') {
        var formats = unescape(queryString['fmt_url_map']).split(',');
        for(x in formats){
            var f = formats[x].split('|');
            for(y in available_formats) {
                if(available_formats[y] == f[0]){
                      //console.log(f[0]+"----"+f[1]);
                      return f[1];
                      }
            }
        }
    }
    
    
  }
  
  
  var results = new Array();
  if (myJsonObject.data.totalItems > 0){
    for (i=0;i<myJsonObject.data.totalItems && i<properties.maxResults;i++){
      var url = process(myJsonObject.data.items[i].player['default']);
      if (url !== 'undefined') {
          var result = new Object();
          result.artist = artist;
          result.track = track;
          //result.year = ;
          result.source = properties.name;
          result.url = url;
          result.mimetype = "video/h264";
          //result.extension = "flv";
          //result.bitrate = 128;
          result.duration = myJsonObject.data.items[i].duration;
          result.score = 1.00;
          results.push(result);
      }
    }
  }
  var response = new Object();
  response.qid = qid;
  response.results = results;
  return response;
}

/*var res = resolve(0, 'adele', '', 'rolling in the deep');
console.log(res.results[0].url);
phantom.exit();*/