1 /*globals window, document, jQuery, _, Backbone, _wpmejsSettings */

     2 

     3 (function ($, _, Backbone) {

     4 	"use strict";

     5 

     6 	var WPPlaylistView = Backbone.View.extend({

     7 		initialize : function (options) {

     8 			this.index = 0;

     9 			this.settings = {};

    10 			this.data = options.metadata || $.parseJSON( this.$('script.wp-playlist-script').html() );

    11 			this.playerNode = this.$( this.data.type );

    12 

    13 			this.tracks = new Backbone.Collection( this.data.tracks );

    14 			this.current = this.tracks.first();

    15 

    16 			if ( 'audio' === this.data.type ) {

    17 				this.currentTemplate = wp.template( 'wp-playlist-current-item' );

    18 				this.currentNode = this.$( '.wp-playlist-current-item' );

    19 			}

    20 

    21 			this.renderCurrent();

    22 

    23 			if ( this.data.tracklist ) {

    24 				this.itemTemplate = wp.template( 'wp-playlist-item' );

    25 				this.playingClass = 'wp-playlist-playing';

    26 				this.renderTracks();

    27 			}

    28 

    29 			this.playerNode.attr( 'src', this.current.get( 'src' ) );

    30 

    31 			_.bindAll( this, 'bindPlayer', 'bindResetPlayer', 'setPlayer', 'ended', 'clickTrack' );

    32 

    33 			if ( ! _.isUndefined( window._wpmejsSettings ) ) {

    34 				this.settings = _wpmejsSettings;

    35 			}

    36 			this.settings.success = this.bindPlayer;

    37 			this.setPlayer();

    38 		},

    39 

    40 		bindPlayer : function (mejs) {

    41 			this.mejs = mejs;

    42 			this.mejs.addEventListener( 'ended', this.ended );

    43 		},

    44 

    45 		bindResetPlayer : function (mejs) {

    46 			this.bindPlayer( mejs );

    47 			this.playCurrentSrc();

    48 		},

    49 

    50 		setPlayer: function (force) {

    51 			if ( this.player ) {

    52 				this.player.pause();

    53 				this.player.remove();

    54 				this.playerNode = this.$( this.data.type );

    55 			}

    56 

    57 			if (force) {

    58 				this.playerNode.attr( 'src', this.current.get( 'src' ) );

    59 				this.settings.success = this.bindResetPlayer;

    60 			}

    61 

    62 			/**

    63 			 * This is also our bridge to the outside world

    64 			 */

    65 			this.player = new MediaElementPlayer( this.playerNode.get(0), this.settings );

    66 		},

    67 

    68 		playCurrentSrc : function () {

    69 			this.renderCurrent();

    70 			this.mejs.setSrc( this.playerNode.attr( 'src' ) );

    71 			this.mejs.load();

    72 			this.mejs.play();

    73 		},

    74 

    75 		renderCurrent : function () {

    76 			var dimensions, defaultImage = 'wp-includes/images/media/video.png';

    77 			if ( 'video' === this.data.type ) {

    78 				if ( this.data.images && this.current.get( 'image' ) && -1 === this.current.get( 'image' ).src.indexOf( defaultImage ) ) {

    79 					this.playerNode.attr( 'poster', this.current.get( 'image' ).src );

    80 				}

    81 				dimensions = this.current.get( 'dimensions' ).resized;

    82 				this.playerNode.attr( dimensions );

    83 			} else {

    84 				if ( ! this.data.images ) {

    85 					this.current.set( 'image', false );

    86 				}

    87 				this.currentNode.html( this.currentTemplate( this.current.toJSON() ) );

    88 			}

    89 		},

    90 

    91 		renderTracks : function () {

    92 			var self = this, i = 1, tracklist = $( '<div class="wp-playlist-tracks"></div>' );

    93 			this.tracks.each(function (model) {

    94 				if ( ! self.data.images ) {

    95 					model.set( 'image', false );

    96 				}

    97 				model.set( 'artists', self.data.artists );

    98 				model.set( 'index', self.data.tracknumbers ? i : false );

    99 				tracklist.append( self.itemTemplate( model.toJSON() ) );

   100 				i += 1;

   101 			});

   102 			this.$el.append( tracklist );

   103 

   104 			this.$( '.wp-playlist-item' ).eq(0).addClass( this.playingClass );

   105 		},

   106 

   107 		events : {

   108 			'click .wp-playlist-item' : 'clickTrack',

   109 			'click .wp-playlist-next' : 'next',

   110 			'click .wp-playlist-prev' : 'prev'

   111 		},

   112 

   113 		clickTrack : function (e) {

   114 			e.preventDefault();

   115 

   116 			this.index = this.$( '.wp-playlist-item' ).index( e.currentTarget );

   117 			this.setCurrent();

   118 		},

   119 

   120 		ended : function () {

   121 			if ( this.index + 1 < this.tracks.length ) {

   122 				this.next();

   123 			} else {

   124 				this.index = 0;

   125 				this.setCurrent();

   126 			}

   127 		},

   128 

   129 		next : function () {

   130 			this.index = this.index + 1 >= this.tracks.length ? 0 : this.index + 1;

   131 			this.setCurrent();

   132 		},

   133 

   134 		prev : function () {

   135 			this.index = this.index - 1 < 0 ? this.tracks.length - 1 : this.index - 1;

   136 			this.setCurrent();

   137 		},

   138 

   139 		loadCurrent : function () {

   140 			var last = this.playerNode.attr( 'src' ) && this.playerNode.attr( 'src' ).split('.').pop(),

   141 				current = this.current.get( 'src' ).split('.').pop();

   142 

   143 			this.mejs && this.mejs.pause();

   144 

   145 			if ( last !== current ) {

   146 				this.setPlayer( true );

   147 			} else {

   148 				this.playerNode.attr( 'src', this.current.get( 'src' ) );

   149 				this.playCurrentSrc();

   150 			}

   151 		},

   152 

   153 		setCurrent : function () {

   154 			this.current = this.tracks.at( this.index );

   155 

   156 			if ( this.data.tracklist ) {

   157 				this.$( '.wp-playlist-item' )

   158 					.removeClass( this.playingClass )

   159 					.eq( this.index )

   160 						.addClass( this.playingClass );

   161 			}

   162 

   163 			this.loadCurrent();

   164 		}

   165 	});

   166 

   167     $(document).ready(function () {

   168 		$('.wp-playlist').each( function() {

   169 			return new WPPlaylistView({ el: this });

   170 		} );

   171     });

   172 

   173 	window.WPPlaylistView = WPPlaylistView;

   174 

   175 }(jQuery, _, Backbone));