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playlist.php
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<?php /** * Server-side rendering of the `core/playlist` block. * * @package WordPress */ /** * Renders the `core/playlist` block on server. * * @since 7.1.0 * * @param array $attributes The block attributes. * @param string $content The block content. * @param WP_Block $block The block instance. * * @return string Returns the Playlist. */ function render_block_core_playlist( $attributes, $content, $block ) { $playlist_id = wp_unique_id( 'playlist-' ); $playlist_tracks = array(); $tracks_data = array(); $show_play_button_artwork = ! empty( $attributes['showPlayButtonArtwork'] ); // Parse inner blocks to extract track data. // This approach avoids duplicating track data in the HTML output. if ( ! empty( $block->inner_blocks ) ) { foreach ( $block->inner_blocks as $inner_block ) { if ( 'core/playlist-track' === $inner_block->name ) { $track_attributes = $inner_block->attributes; if ( empty( $track_attributes['id'] ) ) { continue; } $track_id = 'track-' . count( $playlist_tracks ); $playlist_tracks[] = $track_id; // Extract track metadata from block attributes. $title = isset( $track_attributes['title'] ) && ! empty( $track_attributes['title'] ) ? $track_attributes['title'] : __( 'Unknown title' ); $artist = $track_attributes['artist'] ?? ''; $album = $track_attributes['album'] ?? ''; $image = $track_attributes['image'] ?? ''; $image_alt = $track_attributes['imageAlt'] ?? ''; $url = $track_attributes['src'] ?? ''; $aria_label = $title; if ( $title && $artist && $album ) { $aria_label = sprintf( /* translators: %1$s: track title, %2$s: artist name, %3$s: album name. */ _x( '%1$s by %2$s from the album %3$s', 'track title, artist name, album name' ), $title, $artist, $album ); } // Data is passed to wp_interactivity_state() which JSON-encodes it, // so we use wp_strip_all_tags() instead of esc_html() to prevent // HTML injection without double-encoding. URLs still use esc_url(). $tracks_data[ $track_id ] = array( 'url' => esc_url( $url ), 'title' => wp_strip_all_tags( $title ), 'artist' => wp_strip_all_tags( $artist ), 'album' => wp_strip_all_tags( $album ), 'image' => esc_url( $image ), 'imageAlt' => wp_strip_all_tags( $image_alt ), 'ariaLabel' => wp_strip_all_tags( $aria_label ), ); } } } if ( empty( $playlist_tracks ) ) { return ''; } wp_enqueue_script_module( '@wordpress/block-library/playlist/view' ); // Add the playlist tracks to the global state, // but keep them isolated from other playlists with the help of playlistId. wp_interactivity_state( 'core/playlist', array( 'playlists' => array( $playlist_id => array( 'tracks' => $tracks_data, ), ), ) ); // Add waveform player container with translated button labels. $label_play = esc_attr__( 'Play' ); $label_pause = esc_attr__( 'Pause' ); $label_seek = esc_attr__( 'Seek' ); /* translators: %1$s: current audio time, %2$s: total audio duration. */ $label_seek_value = esc_attr_x( '%1$s of %2$s', 'audio current time of total duration' ); $waveform_color_attribute = ''; $waveform_gradient_attribute = ''; $waveform_background_color_attribute = ''; $waveform_background_gradient_attribute = ''; if ( ! empty( $attributes['waveformColor'] ) ) { $waveform_color_attribute = sprintf( ' data-waveform-player-color="%s"', esc_attr( $attributes['waveformColor'] ) ); } if ( ! empty( $attributes['waveformGradient'] ) ) { $waveform_gradient_attribute = sprintf( ' data-waveform-player-gradient="%s"', esc_attr( $attributes['waveformGradient'] ) ); } if ( ! empty( $attributes['waveformBackgroundColor'] ) ) { $waveform_background_color_attribute = sprintf( ' data-waveform-player-background-color="%s"', esc_attr( $attributes['waveformBackgroundColor'] ) ); } if ( ! empty( $attributes['waveformBackgroundGradient'] ) ) { $waveform_background_gradient_attribute = sprintf( ' data-waveform-player-background-gradient="%s"', esc_attr( $attributes['waveformBackgroundGradient'] ) ); } $html = '<div class="wp-block-playlist__waveform-player"' . $waveform_color_attribute . $waveform_gradient_attribute . $waveform_background_color_attribute . $waveform_background_gradient_attribute . ' data-wp-watch="callbacks.initWaveformPlayer" data-label-play="' . $label_play . '" data-label-pause="' . $label_pause . '" data-label-seek="' . $label_seek . '" data-label-seek-value="' . $label_seek_value . '" ></div>'; // Add the waveform player container inside the figure. $figure = null; preg_match( '/<figure[^>]*>/', $content, $figure ); if ( ! empty( $figure[0] ) ) { $content = preg_replace( '/(<figure[^>]*>)/', '$1' . $html, $content, 1 ); } $processor = new WP_HTML_Tag_Processor( $content ); $processor->next_tag( 'figure' ); $processor->set_attribute( 'data-wp-interactive', 'core/playlist' ); $waveform_style = $attributes['waveformStyle'] ?? 'bars'; $processor->set_attribute( 'data-wp-context', wp_json_encode( array( 'playlistId' => $playlist_id, 'currentId' => $playlist_tracks[0], 'isPlaying' => false, 'tracks' => $playlist_tracks, 'waveformStyle' => $waveform_style, 'showPlayButtonArtwork' => $show_play_button_artwork, 'labelPauseTrack' => __( 'Pause' ), 'labelSelectTrack' => __( 'Play' ), ) ) ); // Track IDs are render-time only. Add them after inner blocks have rendered // so track buttons can update the Interactivity API state without storing // persistent unique IDs in post content. $track_index = 0; while ( $processor->next_tag( array( 'class_name' => 'wp-block-playlist-track__button' ) ) ) { $track_id = $playlist_tracks[ $track_index ] ?? null; if ( null === $track_id ) { break; } $processor->set_attribute( 'data-wp-context', wp_json_encode( array( 'trackId' => $track_id, ) ) ); ++$track_index; } return $processor->get_updated_html(); } /** * Registers the `core/playlist` block on server. * * @since 7.1.0 */ function register_block_core_playlist() { register_block_type_from_metadata( __DIR__ . '/playlist', array( 'render_callback' => 'render_block_core_playlist', ) ); } add_action( 'init', 'register_block_core_playlist' );