/* global _wpmejsSettings, MediaElementPlayer */
(function ($, _, Backbone) {
'use strict';
/** @namespace wp */
window.wp = window.wp || {};
var WPPlaylistView = Backbone.View.extend(/** @lends WPPlaylistView.prototype */{
/**
* @constructs
*
* @param {Object} options The options to create this playlist view with.
* @param {Object} options.metadata The metadata
*/
initialize : function (options) {
this.index = 0;
this.settings = {};
this.data = options.metadata || $.parseJSON( this.$('script.wp-playlist-script').html() );
this.playerNode = this.$( this.data.type );
this.tracks = new Backbone.Collection( this.data.tracks );
this.current = this.tracks.first();
if ( 'audio' === this.data.type ) {
this.currentTemplate = wp.template( 'wp-playlist-current-item' );
this.currentNode = this.$( '.wp-playlist-current-item' );
}
this.renderCurrent();
if ( this.data.tracklist ) {
this.itemTemplate = wp.template( 'wp-playlist-item' );
this.playingClass = 'wp-playlist-playing';
this.renderTracks();
}
this.playerNode.attr( 'src', this.current.get( 'src' ) );
_.bindAll( this, 'bindPlayer', 'bindResetPlayer', 'setPlayer', 'ended', 'clickTrack' );
if ( ! _.isUndefined( window._wpmejsSettings ) ) {
this.settings = _.clone( _wpmejsSettings );
}
this.settings.success = this.bindPlayer;
this.setPlayer();
},
bindPlayer : function (mejs) {
this.mejs = mejs;
this.mejs.addEventListener( 'ended', this.ended );
},
bindResetPlayer : function (mejs) {
this.bindPlayer( mejs );
this.playCurrentSrc();
},
setPlayer: function (force) {
if ( this.player ) {
this.player.pause();
this.player.remove();
this.playerNode = this.$( this.data.type );
}
if (force) {
this.playerNode.attr( 'src', this.current.get( 'src' ) );
this.settings.success = this.bindResetPlayer;
}
// This is also our bridge to the outside world.
this.player = new MediaElementPlayer( this.playerNode.get(0), this.settings );
},
playCurrentSrc : function () {
this.renderCurrent();
this.mejs.setSrc( this.playerNode.attr( 'src' ) );
this.mejs.load();
this.mejs.play();
},
renderCurrent : function () {
var dimensions, defaultImage = 'wp-includes/images/media/video.svg';
if ( 'video' === this.data.type ) {
if ( this.data.images && this.current.get( 'image' ) && -1 === this.current.get( 'image' ).src.indexOf( defaultImage ) ) {
this.playerNode.attr( 'poster', this.current.get( 'image' ).src );
}
dimensions = this.current.get( 'dimensions' );
if ( dimensions && dimensions.resized ) {
this.playerNode.attr( dimensions.resized );
}
} else {
if ( ! this.data.images ) {
this.current.set( 'image', false );
}
this.currentNode.html( this.currentTemplate( this.current.toJSON() ) );
}
},
renderTracks : function () {
var self = this, i = 1, tracklist = $( '<div class="wp-playlist-tracks"></div>' );
this.tracks.each(function (model) {
if ( ! self.data.images ) {
model.set( 'image', false );
}
model.set( 'artists', self.data.artists );
model.set( 'index', self.data.tracknumbers ? i : false );
tracklist.append( self.itemTemplate( model.toJSON() ) );
i += 1;
});
this.$el.append( tracklist );
this.$( '.wp-playlist-item' ).eq(0).addClass( this.playingClass );
},
events : {
'click .wp-playlist-item' : 'clickTrack',
'click .wp-playlist-next' : 'next',
'click .wp-playlist-prev' : 'prev'
},
clickTrack : function (e) {
e.preventDefault();
this.index = this.$( '.wp-playlist-item' ).index( e.currentTarget );
this.setCurrent();
},
ended : function () {
if ( this.index + 1 < this.tracks.length ) {
this.next();
} else {
this.index = 0;
this.setCurrent();
}
},
next : function () {
this.index = this.index + 1 >= this.tracks.length ? 0 : this.index + 1;
this.setCurrent();
},
prev : function () {
this.index = this.index - 1 < 0 ? this.tracks.length - 1 : this.index - 1;
this.setCurrent();
},
loadCurrent : function () {
var last = this.playerNode.attr( 'src' ) && this.playerNode.attr( 'src' ).split('.').pop(),
current = this.current.get( 'src' ).split('.').pop();
this.mejs && this.mejs.pause();
if ( last !== current ) {
this.setPlayer( true );
} else {
this.playerNode.attr( 'src', this.current.get( 'src' ) );
this.playCurrentSrc();
}
},
setCurrent : function () {
this.current = this.tracks.at( this.index );
if ( this.data.tracklist ) {
this.$( '.wp-playlist-item' )
.removeClass( this.playingClass )
.eq( this.index )
.addClass( this.playingClass );
}
this.loadCurrent();
}
});
/**
* Initialize media playlists in the document.
*
* Only initializes new playlists not previously-initialized.
*
* @since 4.9.3
* @return {void}
*/
function initialize() {
$( '.wp-playlist:not(:has(.mejs-container))' ).each( function() {
new WPPlaylistView( { el: this } );
} );
}
/**
* Expose the API publicly on window.wp.playlist.
*
* @namespace wp.playlist
* @since 4.9.3
* @type {object}
*/
window.wp.playlist = {
initialize: initialize
};
$( document ).ready( initialize );
window.WPPlaylistView = WPPlaylistView;
}(jQuery, _, Backbone));
في ظل التحول الرقمي المتسارع، أصبح التسويق الإلكتروني أحد أهم الأدوات التي تعتمد عليها المؤسسات والشركات لتحقيق الانتشار والوصول إلى جمهور أوسع.
في هذا الحوار التسجيلي، نسلّط الضوء على مفهوم التسويق الإلكتروني، أهميته في العصر الحديث، وكيف غيّر قواعد اللعبة في عالم المال والأعمال.
ال
