1/* global _wpmejsSettings, MediaElementPlayer */
2
3(function ($, _, Backbone) {
4 'use strict';
5
6 /** @namespace wp */
7 window.wp = window.wp || {};
8
9 var WPPlaylistView = Backbone.View.extend(/** @lends WPPlaylistView.prototype */{
10 /**
11 * @constructs
12 *
13 * @param {Object} options The options to create this playlist view with.
14 * @param {Object} options.metadata The metadata
15 */
16 initialize : function (options) {
17 this.index = 0;
18 this.settings = {};
19 this.data = options.metadata || $.parseJSON( this.$('script.wp-playlist-script').html() );
20 this.playerNode = this.$( this.data.type );
21
22 this.tracks = new Backbone.Collection( this.data.tracks );
23 this.current = this.tracks.first();
24
25 if ( 'audio' === this.data.type ) {
26 this.currentTemplate = wp.template( 'wp-playlist-current-item' );
27 this.currentNode = this.$( '.wp-playlist-current-item' );
28 }
29
30 this.renderCurrent();
31
32 if ( this.data.tracklist ) {
33 this.itemTemplate = wp.template( 'wp-playlist-item' );
34 this.playingClass = 'wp-playlist-playing';
35 this.renderTracks();
36 }
37
38 this.playerNode.attr( 'src', this.current.get( 'src' ) );
39
40 _.bindAll( this, 'bindPlayer', 'bindResetPlayer', 'setPlayer', 'ended', 'clickTrack' );
41
42 if ( ! _.isUndefined( window._wpmejsSettings ) ) {
43 this.settings = _.clone( _wpmejsSettings );
44 }
45 this.settings.success = this.bindPlayer;
46 this.setPlayer();
47 },
48
49 bindPlayer : function (mejs) {
50 this.mejs = mejs;
51 this.mejs.addEventListener( 'ended', this.ended );
52 },
53
54 bindResetPlayer : function (mejs) {
55 this.bindPlayer( mejs );
56 this.playCurrentSrc();
57 },
58
59 setPlayer: function (force) {
60 if ( this.player ) {
61 this.player.pause();
62 this.player.remove();
63 this.playerNode = this.$( this.data.type );
64 }
65
66 if (force) {
67 this.playerNode.attr( 'src', this.current.get( 'src' ) );
68 this.settings.success = this.bindResetPlayer;
69 }
70
71 // This is also our bridge to the outside world.
72 this.player = new MediaElementPlayer( this.playerNode.get(0), this.settings );
73 },
74
75 playCurrentSrc : function () {
76 this.renderCurrent();
77 this.mejs.setSrc( this.playerNode.attr( 'src' ) );
78 this.mejs.load();
79 this.mejs.play();
80 },
81
82 renderCurrent : function () {
83 var dimensions, defaultImage = 'wp-includes/images/media/video.svg';
84 if ( 'video' === this.data.type ) {
85 if ( this.data.images && this.current.get( 'image' ) && -1 === this.current.get( 'image' ).src.indexOf( defaultImage ) ) {
86 this.playerNode.attr( 'poster', this.current.get( 'image' ).src );
87 }
88 dimensions = this.current.get( 'dimensions' );
89 if ( dimensions && dimensions.resized ) {
90 this.playerNode.attr( dimensions.resized );
91 }
92 } else {
93 if ( ! this.data.images ) {
94 this.current.set( 'image', false );
95 }
96 this.currentNode.html( this.currentTemplate( this.current.toJSON() ) );
97 }
98 },
99
100 renderTracks : function () {
101 var self = this, i = 1, tracklist = $( '<div class="wp-playlist-tracks"></div>' );
102 this.tracks.each(function (model) {
103 if ( ! self.data.images ) {
104 model.set( 'image', false );
105 }
106 model.set( 'artists', self.data.artists );
107 model.set( 'index', self.data.tracknumbers ? i : false );
108 tracklist.append( self.itemTemplate( model.toJSON() ) );
109 i += 1;
110 });
111 this.$el.append( tracklist );
112
113 this.$( '.wp-playlist-item' ).eq(0).addClass( this.playingClass );
114 },
115
116 events : {
117 'click .wp-playlist-item' : 'clickTrack',
118 'click .wp-playlist-next' : 'next',
119 'click .wp-playlist-prev' : 'prev'
120 },
121
122 clickTrack : function (e) {
123 e.preventDefault();
124
125 this.index = this.$( '.wp-playlist-item' ).index( e.currentTarget );
126 this.setCurrent();
127 },
128
129 ended : function () {
130 if ( this.index + 1 < this.tracks.length ) {
131 this.next();
132 } else {
133 this.index = 0;
134 this.setCurrent();
135 }
136 },
137
138 next : function () {
139 this.index = this.index + 1 >= this.tracks.length ? 0 : this.index + 1;
140 this.setCurrent();
141 },
142
143 prev : function () {
144 this.index = this.index - 1 < 0 ? this.tracks.length - 1 : this.index - 1;
145 this.setCurrent();
146 },
147
148 loadCurrent : function () {
149 var last = this.playerNode.attr( 'src' ) && this.playerNode.attr( 'src' ).split('.').pop(),
150 current = this.current.get( 'src' ).split('.').pop();
151
152 this.mejs && this.mejs.pause();
153
154 if ( last !== current ) {
155 this.setPlayer( true );
156 } else {
157 this.playerNode.attr( 'src', this.current.get( 'src' ) );
158 this.playCurrentSrc();
159 }
160 },
161
162 setCurrent : function () {
163 this.current = this.tracks.at( this.index );
164
165 if ( this.data.tracklist ) {
166 this.$( '.wp-playlist-item' )
167 .removeClass( this.playingClass )
168 .eq( this.index )
169 .addClass( this.playingClass );
170 }
171
172 this.loadCurrent();
173 }
174 });
175
176 /**
177 * Initialize media playlists in the document.
178 *
179 * Only initializes new playlists not previously-initialized.
180 *
181 * @since 4.9.3
182 * @return {void}
183 */
184 function initialize() {
185 $( '.wp-playlist:not(:has(.mejs-container))' ).each( function() {
186 new WPPlaylistView( { el: this } );
187 } );
188 }
189
190 /**
191 * Expose the API publicly on window.wp.playlist.
192 *
193 * @namespace wp.playlist
194 * @since 4.9.3
195 * @type {object}
196 */
197 window.wp.playlist = {
198 initialize: initialize
199 };
200
201 $( document ).ready( initialize );
202
203 window.WPPlaylistView = WPPlaylistView;
204
205}(jQuery, _, Backbone));
206