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<?php
/**
* Podcast Player Block.
*
* @since 8.4.0
*
* @package automattic/jetpack
*/
namespace Automattic\Jetpack\Extensions\Podcast_Player;
use Automattic\Jetpack\Blocks;
use Jetpack_Gutenberg;
use Jetpack_Podcast_Helper;
const FEATURE_NAME = 'podcast-player';
const BLOCK_NAME = 'jetpack/' . FEATURE_NAME;
if ( ! class_exists( 'Jetpack_Podcast_Helper' ) ) {
\jetpack_require_lib( 'class-jetpack-podcast-helper' );
}
/**
* Registers the block for use in Gutenberg. This is done via an action so that
* we can disable registration if we need to.
*/
function register_block() {
Blocks::jetpack_register_block(
BLOCK_NAME,
array(
'attributes' => array(
'url' => array(
'type' => 'string',
),
'itemsToShow' => array(
'type' => 'integer',
'default' => 5,
),
'showCoverArt' => array(
'type' => 'boolean',
'default' => true,
),
'showEpisodeTitle' => array(
'type' => 'boolean',
'default' => true,
),
'showEpisodeDescription' => array(
'type' => 'boolean',
'default' => true,
),
),
'render_callback' => __NAMESPACE__ . '\render_block',
'supports' => array(
'align' => array( 'wide', 'full' ),
'spacing' => array(
'padding' => true,
'margin' => true,
),
),
// Since Gutenberg #31873.
'style' => 'wp-mediaelement',
)
);
}
add_action( 'init', __NAMESPACE__ . '\register_block' );
/**
* Returns the error message wrapped in HTML if current user
* has the capability to edit the post. Public visitors will
* never see errors.
*
* @param string $message The error message to display.
* @return string
*/
function render_error( $message ) {
// Suppress errors for users unable to address them.
if ( ! current_user_can( 'edit_posts' ) ) {
return '';
}
return '<p>' . esc_html( $message ) . '</p>';
}
/**
* Podcast Player block registration/dependency declaration.
*
* @param array $attributes Array containing the Podcast Player block attributes.
* @param string $content Fallback content - a direct link to RSS, as rendered by save.js.
* @return string
*/
function render_block( $attributes, $content ) {
// Don't render an interactive version of the block outside the frontend context.
if ( ! jetpack_is_frontend() ) {
return $content;
}
// Test for empty URLS.
if ( empty( $attributes['url'] ) ) {
return render_error( __( 'No Podcast URL provided. Please enter a valid Podcast RSS feed URL.', 'jetpack' ) );
}
// Test for invalid URLs.
if ( ! wp_http_validate_url( $attributes['url'] ) ) {
return render_error( __( 'Your podcast URL is invalid and couldn\'t be embedded. Please double check your URL.', 'jetpack' ) );
}
if ( isset( $attributes['selectedEpisodes'] ) && count( $attributes['selectedEpisodes'] ) ) {
$guids = array_map(
function ( $episode ) {
return $episode['guid'];
},
$attributes['selectedEpisodes']
);
$player_args = array( 'guids' => $guids );
} else {
$player_args = array();
}
// Sanitize the URL.
$attributes['url'] = esc_url_raw( $attributes['url'] );
$player_data = ( new Jetpack_Podcast_Helper( $attributes['url'] ) )->get_player_data( $player_args );
if ( is_wp_error( $player_data ) ) {
return render_error( $player_data->get_error_message() );
}
return render_player( $player_data, $attributes );
}
/**
* Renders the HTML for the Podcast player and tracklist.
*
* @param array $player_data The player data details.
* @param array $attributes Array containing the Podcast Player block attributes.
* @return string The HTML for the podcast player.
*/
function render_player( $player_data, $attributes ) {
// If there are no tracks (it is possible) then display appropriate user facing error message.
if ( empty( $player_data['tracks'] ) ) {
return render_error( __( 'No tracks available to play.', 'jetpack' ) );
}
// Only use the amount of tracks requested.
$player_data['tracks'] = array_slice(
$player_data['tracks'],
0,
absint( $attributes['itemsToShow'] )
);
// Generate a unique id for the block instance.
$instance_id = wp_unique_id( 'jetpack-podcast-player-block-' . get_the_ID() . '-' );
$player_data['playerId'] = $instance_id;
// Generate object to be used as props for PodcastPlayer.
$player_props = array_merge(
// Add all attributes.
array( 'attributes' => $attributes ),
// Add all player data.
$player_data
);
$primary_colors = get_colors( 'primary', $attributes, 'color' );
$secondary_colors = get_colors( 'secondary', $attributes, 'color' );
$background_colors = get_colors( 'background', $attributes, 'background-color' );
$player_classes_name = trim( "{$secondary_colors['class']} {$background_colors['class']}" );
$player_inline_style = trim( "{$secondary_colors['style']} ${background_colors['style']}" );
$player_inline_style .= get_css_vars( $attributes );
$wrapper_attributes = \WP_Block_Supports::get_instance()->apply_block_supports();
$block_classname = Blocks::classes( FEATURE_NAME, $attributes, array( 'is-default' ) );
$is_amp = Blocks::is_amp_request();
ob_start();
?>
<div class="<?php echo esc_attr( $block_classname ); ?>"<?php echo ! empty( $wrapper_attributes['style'] ) ? ' style="' . esc_attr( $wrapper_attributes['style'] ) . '"' : ''; ?> id="<?php echo esc_attr( $instance_id ); ?>">
<section
class="jetpack-podcast-player <?php echo esc_attr( $player_classes_name ); ?>"
style="<?php echo esc_attr( $player_inline_style ); ?>"
>
<?php
render(
'podcast-header',
array_merge(
$player_props,
array(
'primary_colors' => $primary_colors,
'player_id' => $player_data['playerId'],
)
)
);
?>
<?php if ( count( $player_data['tracks'] ) > 1 ) : ?>
<ol class="jetpack-podcast-player__tracks">
<?php foreach ( $player_data['tracks'] as $track_index => $attachment ) : ?>
<?php
render(
'playlist-track',
array(
'is_active' => 0 === $track_index,
'attachment' => $attachment,
'primary_colors' => $primary_colors,
'secondary_colors' => $secondary_colors,
)
);
?>
<?php endforeach; ?>
</ol>
<?php endif; ?>
</section>
<?php if ( ! $is_amp ) : ?>
<script type="application/json"><?php echo wp_json_encode( $player_props ); ?></script>
<?php endif; ?>
</div>
<?php
/**
* Enqueue necessary scripts and styles.
*/
if ( ! $is_amp ) {
wp_enqueue_style( 'wp-mediaelement' );
}
Jetpack_Gutenberg::load_assets_as_required( FEATURE_NAME, array( 'mediaelement' ) );
return ob_get_clean();
}
/**
* Given the color name, block attributes and the CSS property,
* the function will return an array with the `class` and `style`
* HTML attributes to be used straight in the markup.
*
* @example
* $color = get_colors( 'secondary', $attributes, 'border-color'
* => array( 'class' => 'has-secondary', 'style' => 'border-color: #333' )
*
* @param string $name Color attribute name, for instance `primary`, `secondary`, ...
* @param array $attrs Block attributes.
* @param string $property Color CSS property, fo instance `color`, `background-color`, ...
* @return array Colors array.
*/
function get_colors( $name, $attrs, $property ) {
$attr_color = "{$name}Color";
$attr_custom = 'custom' . ucfirst( $attr_color );
$color = isset( $attrs[ $attr_color ] ) ? $attrs[ $attr_color ] : null;
$custom_color = isset( $attrs[ $attr_custom ] ) ? $attrs[ $attr_custom ] : null;
$colors = array(
'class' => '',
'style' => '',
);
if ( $color || $custom_color ) {
$colors['class'] .= "has-{$name}";
if ( $color ) {
$colors['class'] .= " has-{$color}-{$property}";
} elseif ( $custom_color ) {
$colors['style'] .= "{$property}: {$custom_color};";
}
}
return $colors;
}
/**
* It generates a string with CSS variables according to the
* block colors, prefixing each one with `--jetpack-podcast-player'.
*
* @param array $attrs Podcast Block attributes object.
* @return string CSS variables depending on block colors.
*/
function get_css_vars( $attrs ) {
$colors_name = array( 'primary', 'secondary', 'background' );
$inline_style = '';
foreach ( $colors_name as $color ) {
$hex_color = 'hex' . ucfirst( $color ) . 'Color';
if ( ! empty( $attrs[ $hex_color ] ) ) {
$inline_style .= " --jetpack-podcast-player-{$color}: {$attrs[ $hex_color ]};";
}
}
return $inline_style;
}
/**
* Render the given template in server-side.
* Important note:
* The $template_props array will be extracted.
* This means it will create a var for each array item.
* Keep it mind when using this param to pass
* properties to the template.
*
* @param string $name Template name, available in `./templates` folder.
* @param array $template_props Template properties. Optional.
* @param bool $print Render template. True as default.
* @return false|string HTML markup or false.
*/
function render( $name, $template_props = array(), $print = true ) {
if ( ! strpos( $name, '.php' ) ) {
$name = $name . '.php';
}
$template_path = __DIR__ . '/templates/' . $name;
if ( ! file_exists( $template_path ) ) {
return '';
}
if ( $print ) {
include $template_path;
} else {
ob_start();
include $template_path;
$markup = ob_get_contents();
ob_end_clean();
return $markup;
}
}