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<?php
/**
 * Widget API: WP_Widget_Media_Video class
 *
 * @package WordPress
 * @subpackage Widgets
 * @since 4.8.0
 */

/**
 * Core class that implements a video widget.
 *
 * @since 4.8.0
 *
 * @see WP_Widget_Media
 * @see WP_Widget
 */
class WP_Widget_Media_Video extends WP_Widget_Media {

   
/**
     * Constructor.
     *
     * @since 4.8.0
     */
   
public function __construct() {
       
parent::__construct(
           
'media_video',
           
__( 'Video' ),
            array(
               
'description' => __( 'Displays a video from the media library or from YouTube, Vimeo, or another provider.' ),
               
'mime_type'   => 'video',
            )
        );

       
$this->l10n = array_merge(
           
$this->l10n,
            array(
               
'no_media_selected'          => __( 'No video selected' ),
               
'add_media'                  => _x( 'Add Video', 'label for button in the video widget' ),
               
'replace_media'              => _x( 'Replace Video', 'label for button in the video widget; should preferably not be longer than ~13 characters long' ),
               
'edit_media'                 => _x( 'Edit Video', 'label for button in the video widget; should preferably not be longer than ~13 characters long' ),
               
'missing_attachment'         => sprintf(
                   
/* translators: %s: URL to media library. */
                   
__( 'That video cannot be found. Check your <a href="%s">media library</a> and make sure it was not deleted.' ),
                   
esc_url( admin_url( 'upload.php' ) )
                ),
               
/* translators: %d: Widget count. */
               
'media_library_state_multi'  => _n_noop( 'Video Widget (%d)', 'Video Widget (%d)' ),
               
'media_library_state_single' => __( 'Video Widget' ),
               
/* translators: %s: A list of valid video file extensions. */
               
'unsupported_file_type'      => sprintf( __( 'Sorry, the video at the supplied URL cannot be loaded. Please check that the URL is for a supported video file (%s) or stream (e.g. YouTube and Vimeo).' ), '<code>.' . implode( '</code>, <code>.', wp_get_video_extensions() ) . '</code>' ),
            )
        );
    }

   
/**
     * Get schema for properties of a widget instance (item).
     *
     * @since 4.8.0
     *
     * @see WP_REST_Controller::get_item_schema()
     * @see WP_REST_Controller::get_additional_fields()
     * @link https://core.trac.wordpress.org/ticket/35574
     *
     * @return array Schema for properties.
     */
   
public function get_instance_schema() {

       
$schema = array(
           
'preload' => array(
               
'type'                  => 'string',
               
'enum'                  => array( 'none', 'auto', 'metadata' ),
               
'default'               => 'metadata',
               
'description'           => __( 'Preload' ),
               
'should_preview_update' => false,
            ),
           
'loop'    => array(
               
'type'                  => 'boolean',
               
'default'               => false,
               
'description'           => __( 'Loop' ),
               
'should_preview_update' => false,
            ),
           
'content' => array(
               
'type'                  => 'string',
               
'default'               => '',
               
'sanitize_callback'     => 'wp_kses_post',
               
'description'           => __( 'Tracks (subtitles, captions, descriptions, chapters, or metadata)' ),
               
'should_preview_update' => false,
            ),
        );

        foreach (
wp_get_video_extensions() as $video_extension ) {
           
$schema[ $video_extension ] = array(
               
'type'        => 'string',
               
'default'     => '',
               
'format'      => 'uri',
               
/* translators: %s: Video extension. */
               
'description' => sprintf( __( 'URL to the %s video source file' ), $video_extension ),
            );
        }

        return
array_merge( $schema, parent::get_instance_schema() );
    }

   
/**
     * Render the media on the frontend.
     *
     * @since 4.8.0
     *
     * @param array $instance Widget instance props.
     */
   
public function render_media( $instance ) {
       
$instance   = array_merge( wp_list_pluck( $this->get_instance_schema(), 'default' ), $instance );
       
$attachment = null;

        if (
$this->is_attachment_with_mime_type( $instance['attachment_id'], $this->widget_options['mime_type'] ) ) {
           
$attachment = get_post( $instance['attachment_id'] );
        }

       
$src = $instance['url'];
        if (
$attachment ) {
           
$src = wp_get_attachment_url( $attachment->ID );
        }

        if ( empty(
$src ) ) {
            return;
        }

       
$youtube_pattern = '#^https?://(?:www\.)?(?:youtube\.com/watch|youtu\.be/)#';
       
$vimeo_pattern   = '#^https?://(.+\.)?vimeo\.com/.*#';

        if (
$attachment || preg_match( $youtube_pattern, $src ) || preg_match( $vimeo_pattern, $src ) ) {
           
add_filter( 'wp_video_shortcode', array( $this, 'inject_video_max_width_style' ) );

            echo
wp_video_shortcode(
               
array_merge(
                   
$instance,
                   
compact( 'src' )
                ),
               
$instance['content']
            );

           
remove_filter( 'wp_video_shortcode', array( $this, 'inject_video_max_width_style' ) );
        } else {
            echo
$this->inject_video_max_width_style( wp_oembed_get( $src ) );
        }
    }

   
/**
     * Inject max-width and remove height for videos too constrained to fit inside sidebars on frontend.
     *
     * @since 4.8.0
     *
     * @param string $html Video shortcode HTML output.
     * @return string HTML Output.
     */
   
public function inject_video_max_width_style( $html ) {
       
$html = preg_replace( '/\sheight="\d+"/', '', $html );
       
$html = preg_replace( '/\swidth="\d+"/', '', $html );
       
$html = preg_replace( '/(?<=width:)\s*\d+px(?=;?)/', '100%', $html );
        return
$html;
    }

   
/**
     * Enqueue preview scripts.
     *
     * These scripts normally are enqueued just-in-time when a video shortcode is used.
     * In the customizer, however, widgets can be dynamically added and rendered via
     * selective refresh, and so it is important to unconditionally enqueue them in
     * case a widget does get added.
     *
     * @since 4.8.0
     */
   
public function enqueue_preview_scripts() {
       
/** This filter is documented in wp-includes/media.php */
       
if ( 'mediaelement' === apply_filters( 'wp_video_shortcode_library', 'mediaelement' ) ) {
           
wp_enqueue_style( 'wp-mediaelement' );
           
wp_enqueue_script( 'mediaelement-vimeo' );
           
wp_enqueue_script( 'wp-mediaelement' );
        }
    }

   
/**
     * Loads the required scripts and styles for the widget control.
     *
     * @since 4.8.0
     */
   
public function enqueue_admin_scripts() {
       
parent::enqueue_admin_scripts();

       
$handle = 'media-video-widget';
       
wp_enqueue_script( $handle );

       
$exported_schema = array();
        foreach (
$this->get_instance_schema() as $field => $field_schema ) {
           
$exported_schema[ $field ] = wp_array_slice_assoc( $field_schema, array( 'type', 'default', 'enum', 'minimum', 'format', 'media_prop', 'should_preview_update' ) );
        }
       
wp_add_inline_script(
           
$handle,
           
sprintf(
               
'wp.mediaWidgets.modelConstructors[ %s ].prototype.schema = %s;',
               
wp_json_encode( $this->id_base ),
               
wp_json_encode( $exported_schema )
            )
        );

       
wp_add_inline_script(
           
$handle,
           
sprintf(
               
'
                    wp.mediaWidgets.controlConstructors[ %1$s ].prototype.mime_type = %2$s;
                    wp.mediaWidgets.controlConstructors[ %1$s ].prototype.l10n = _.extend( {}, wp.mediaWidgets.controlConstructors[ %1$s ].prototype.l10n, %3$s );
                '
,
               
wp_json_encode( $this->id_base ),
               
wp_json_encode( $this->widget_options['mime_type'] ),
               
wp_json_encode( $this->l10n )
            )
        );
    }

   
/**
     * Render form template scripts.
     *
     * @since 4.8.0
     */
   
public function render_control_template_scripts() {
       
parent::render_control_template_scripts()
       
?>
       <script type="text/html" id="tmpl-wp-media-widget-video-preview">
            <# if ( data.error && 'missing_attachment' === data.error ) { #>
                <div class="notice notice-error notice-alt notice-missing-attachment">
                    <p><?php echo $this->l10n['missing_attachment']; ?></p>
                </div>
            <# } else if ( data.error && 'unsupported_file_type' === data.error ) { #>
                <div class="notice notice-error notice-alt notice-missing-attachment">
                    <p><?php echo $this->l10n['unsupported_file_type']; ?></p>
                </div>
            <# } else if ( data.error ) { #>
                <div class="notice notice-error notice-alt">
                    <p><?php _e( 'Unable to preview media due to an unknown error.' ); ?></p>
                </div>
            <# } else if ( data.is_oembed && data.model.poster ) { #>
                <a href="{{ data.model.src }}" target="_blank" class="media-widget-video-link">
                    <img src="{{ data.model.poster }}" />
                </a>
            <# } else if ( data.is_oembed ) { #>
                <a href="{{ data.model.src }}" target="_blank" class="media-widget-video-link no-poster">
                    <span class="dashicons dashicons-format-video"></span>
                </a>
            <# } else if ( data.model.src ) { #>
                <?php wp_underscore_video_template(); ?>
           <# } #>
        </script>
        <?php
   
}
}