cuemaker.js

function Cue(albumArtist, title, tracks) {
    this.PERFORMER = albumArtist;
    this.TITLE = title;
    this.TRACKS = tracks;
};


function Track(trackNumber, artist, title, offset) {
    this.TRACK = trackNumber + ' AUDIO';
    this.TITLE = title;
    this.PERFORMER = artist;
    this.INDEX = '01 ' + offset;
};

Number.prototype.toMMSS = function () {
    var sec_num = parseInt(this, 10);
    var minutes = Math.floor(sec_num / 60);
    var seconds = sec_num - (minutes * 60);

    if (minutes < 10) {
        minutes = "0" + minutes;
    }
    if (seconds < 10) {
        seconds = "0" + seconds;
    }
    var time = minutes + ':' + seconds;
    return time;
}

var CueMaker = {
    processDiscogs : function (response) {
        discs = {};
        seconds = 0;
        discNo = '';
        response.tracklist.forEach(function (track) {
            if (track.duration != '' && track.position != '') {
                if (typeof seconds === 'undefined') {
                    seconds = 0
                }
                if (track.position.indexOf('-') != -1)
                {
                  _track = track.position.split('-');
                }
                else if (track.position.indexOf('.') != -1)
                {
                  _track = track.position.split('.');
                }
                else
                {
                  _track = [0,track.position];
                }
                if (discs[_track[0]] == undefined) {
                    discs[_track[0]] = [];
                }
                if (discNo != _track[0])
                {
                  discNo = _track[0];
                  seconds = 0;
                }
                trackId = ('00' + parseInt(_track[1])).substr(-2);

                minutesSeconds = track.duration.split(':');
                offset = seconds.toMMSS();

                newTrack = new Track(trackId, $.map(track.artists,function(item){ return item.name + (item.join ? " " + item.join : ""); }).join(" "), track.title, offset);
                discs[_track[0]].push(newTrack);
                seconds += minutesSeconds[0] * 60 + ~~minutesSeconds[1];
            }
        });
        cues = [];
        $.each(discs,function (idx,disc) {
            cues.push(new Cue(response.artists[0].name, response.title, disc))
        });
        return cues;
    },
    cueElementToText: function(key,val,indent)
    {
      if (key == "TRACKS")
      {
        var s = "";
        $.each(val,function(key,val){
          $.each(val,function(key,val){
            s += CueMaker.cueElementToText(key,val, key == "TRACK" ? 2 : 4);
          })
        })
        return s;
      }
      if (key == "TITLE" || key == "PERFORMER")
        return ("            ".slice(0,indent)) + key + " \"" + val + "\"\n";
      return ("            ".slice(0,indent)) + key + " " + val + "\n";
    },
    createCue: function(cue) {
      var s = "";
      $.each(cue,function(key,val){
        s += CueMaker.cueElementToText(key,val,0);
      })
      return s;
    }
}

$.get(url).done(function(response){
  var cues = CueMaker.processDiscogs(response);
  $.each(cues,function(idx,cue){
    var s = CueMaker.createCue(cue);
    console.log(s);
  });  
});