<?php

/**

 * Widget API: WP_Widget_Media_Audio class

 *

 * @package WordPress

 * @subpackage Widgets

 * @since 4.8.0

 */

/**

 * Core class that implements an audio widget.

 *

 * @since 4.8.0

 *

 * @see WP_Widget

 */

class WP_Widget_Media_Audio extends WP_Widget_Media {

	/**

	 * Constructor.

	 *

	 * @since  4.8.0

	 */

	public function __construct() {

		parent::__construct( 'media_audio', __( 'Audio' ), array(

			'description' => __( 'Displays an audio player.' ),

			'mime_type'   => 'audio',

		) );

		$this->l10n = array_merge( $this->l10n, array(

			'no_media_selected' => __( 'No audio selected' ),

			'add_media' => _x( 'Add Audio', 'label for button in the audio widget' ),

			'replace_media' => _x( 'Replace Audio', 'label for button in the audio widget; should preferably not be longer than ~13 characters long' ),

			'edit_media' => _x( 'Edit Audio', 'label for button in the audio widget; should preferably not be longer than ~13 characters long' ),

			'missing_attachment' => sprintf(

				/* translators: %s: URL to media library */

				__( 'We can&#8217;t find that audio file. Check your <a href="%s">media library</a> and make sure it wasn&#8217;t deleted.' ),

				esc_url( admin_url( 'upload.php' ) )

			),

			/* translators: %d: widget count */

			'media_library_state_multi' => _n_noop( 'Audio Widget (%d)', 'Audio Widget (%d)' ),

			'media_library_state_single' => __( 'Audio Widget' ),

			'unsupported_file_type' => __( 'Looks like this isn’t the correct kind of file. Please link to an audio file instead.' ),

		) );

	}

	/**

	 * 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_merge(

			parent::get_instance_schema(),

			array(

				'preload' => array(

					'type' => 'string',

					'enum' => array( 'none', 'auto', 'metadata' ),

					'default' => 'none',

					'description' => __( 'Preload' ),

				),

				'loop' => array(

					'type' => 'boolean',

					'default' => false,

					'description' => __( 'Loop' ),

				),

			)

		);

		foreach ( wp_get_audio_extensions() as $audio_extension ) {

			$schema[ $audio_extension ] = array(

				'type' => 'string',

				'default' => '',

				'format' => 'uri',

				/* translators: %s: audio extension */

				'description' => sprintf( __( 'URL to the %s audio source file' ), $audio_extension ),

			);

		}

		return $schema;

	}

	/**

	 * Render the media on the frontend.

	 *

	 * @since  4.8.0

	 *

	 * @param array $instance Widget instance props.

	 * @return void

	 */

	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'] );

		}

		if ( $attachment ) {

			$src = wp_get_attachment_url( $attachment->ID );

		} else {

			$src = $instance['url'];

		}

		echo wp_audio_shortcode(

			array_merge(

				$instance,

				compact( 'src' )

			)

		);

	}

	/**

	 * Enqueue preview scripts.

	 *

	 * These scripts normally are enqueued just-in-time when an audio 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_audio_shortcode_library', 'mediaelement' ) ) {

			wp_enqueue_style( 'wp-mediaelement' );

			wp_enqueue_script( 'wp-mediaelement' );

		}

	}

	/**

	 * Loads the required media files for the media manager and scripts for media widgets.

	 *

	 * @since 4.8.0

	 */

	public function enqueue_admin_scripts() {

		parent::enqueue_admin_scripts();

		wp_enqueue_style( 'wp-mediaelement' );

		wp_enqueue_script( 'wp-mediaelement' );

		$handle = 'media-audio-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-audio-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 ) { #>

				<div class="notice notice-error notice-alt">

					<p><?php _e( 'Unable to preview media due to an unknown error.' ); ?></p>

				</div>

			<# } else if ( data.model && data.model.src ) { #>

				<?php wp_underscore_audio_template() ?>

			<# } #>

		</script>

		<?php

	}

}