SoundCloud based audio player

AudioPlayer.js

// Generated by CoffeeScript 1.6.1
(function() {

  define(['soundcloudAPI'], function(SC) {
    var AudioPlayer,
      _this = this;
    AudioPlayer = (function() {

      function AudioPlayer(instruments, playerSelector) {
        var _this = this;
        this.instruments = instruments;
        this.playerSelector = playerSelector != null ? playerSelector : '.instrument.has-track';
        this.stop = function(instrument) {
          return AudioPlayer.prototype.stop.apply(_this, arguments);
        };
        SC.initialize({
          client_id: '*CLIENT ID*'
        });
        SC.whenStreamingReady(function() {
          return _this.streamingReady = true;
        });
        this.muted = Modernizr.sessionstorage ? sessionStorage.getItem('muted') === 'true' : false;
        $('body').toggleClass('muted', this.muted);
      }

      AudioPlayer.prototype.bindEvents = function() {
        var _this = this;
        $('body').on('mouseenter mouseleave', this.playerSelector, {
          self: this
        }, this.handleInstrumentInteraction);
        $('body').on('click', '.mute', {
          self: this
        }, this.toggleMute);
        $(document).on('ahrengot/stop_all_sounds', function() {
          return _this.instruments.each(function(model) {
            return model.set('playing', false);
          });
        });
        return this.instruments.on('change:playing', this.toggleTrack, this);
      };

      AudioPlayer.prototype.toggleMute = function(e) {
        var instrument, instrumentId, muted;
        muted = e.data.self.muted = !e.data.self.muted;
        if (Modernizr.sessionstorage) {
          sessionStorage.setItem('muted', muted);
        }
        $('body').toggleClass('muted', this.muted);
        instrumentId = $(this).data('instrument-id');
        if (instrumentId && muted) {
          return e.data.self.stopAllInstruments();
        } else if (instrumentId && !muted) {
          instrument = e.data.self.instruments.where({
            'id': instrumentId
          })[0];
          if (instrument != null) {
            return instrument.set('playing', true);
          }
        }
      };

      AudioPlayer.prototype.handleInstrumentInteraction = function(e) {
        var instrument, self,
          _this = this;
        self = e.data.self;
        if (self.muted) {
          return;
        }
        if (e.data.self.streamingReady == null) {
          return log("streaming not ready yet.");
        }
        switch (e.type) {
          case 'mouseenter':
            if (self.previewTimer != null) {
              clearTimeout(self.previewTimer);
            }
            return self.previewTimer = setTimeout(function() {
              var id;
              id = $(_this).data('id');
              return self.instruments.each(function(instrument) {
                var isCurrent;
                isCurrent = instrument.get('id') === id;
                return instrument.set('playing', isCurrent);
              });
            }, 0);
          case 'mouseleave':
            instrument = self.instruments.where({
              'id': $(this).data('id')
            })[0];
            if (instrument != null) {
              return instrument.set('playing', false);
            }
        }
      };

      AudioPlayer.prototype.toggleTrack = function(instrument, playing) {
        if (playing) {
          return this.play(instrument);
        } else {
          return this.stop(instrument);
        }
      };

      AudioPlayer.prototype.play = function(instrument) {
        var trackId,
          _this = this;
        if (instrument.$el) {
          instrument.$el.addClass('buffering');
        }
        trackId = instrument.get('track');
        return SC.stream("/tracks/" + trackId, {
          autoPlay: true,
          useFlashBlock: true,
          preferFlash: false,
          useHighPerformance: true,
          onload: function(success) {
            if (!success) {
              return log('Something went wrong trying to preview instrument.');
            }
          }
        }, function(sound) {
          return instrument.set('soundObj', sound);
        });
      };

      AudioPlayer.prototype.stop = function(instrument) {
        var soundObj;
        soundObj = instrument.get('soundObj');
        if (soundObj != null) {
          return soundObj.unload();
        }
      };

      AudioPlayer.prototype.stopAllInstruments = function() {
        return this.instruments.each(function(m) {
          return m.set('playing', false);
        });
      };

      return AudioPlayer;

    })();
    return AudioPlayer;
  });

}).call(this);