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<?php |
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/** |
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* Goodreads block render implementation. |
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* |
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* Loaded lazily from goodreads.php only when the block is rendered, to keep |
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* the render body out of the eager front-end PHP/opcache footprint. |
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* |
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* @package automattic/jetpack |
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*/ |
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|
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namespace Automattic\Jetpack\Extensions\Goodreads; |
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|
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use Automattic\Jetpack\Blocks; |
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use Jetpack_Gutenberg; |
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|
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if ( ! defined( 'ABSPATH' ) ) { |
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exit( 0 ); |
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} |
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|
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/** |
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* Validates a Goodreads widget script URL. |
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* |
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* Accepts only URLs shaped like those generated by createGoodreadsEmbedLink() |
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* in utils.js — keep the two in sync when either side changes. |
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* |
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* @param mixed $url URL to validate. |
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* |
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* @return string Canonical URL rebuilt from the validated components, or an empty string when the URL is not allowed. |
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*/ |
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function get_validated_script_url( $url ) { |
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if ( ! is_string( $url ) || str_contains( $url, '\\' ) ) { |
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return ''; |
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} |
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|
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$parsed = wp_parse_url( esc_url_raw( $url, array( 'https' ) ) ); |
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$encoded_path = is_array( $parsed ) ? $parsed['path'] ?? '' : ''; |
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$path = rawurldecode( $encoded_path ); |
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$has_encoded_separator = 1 === preg_match( '~%(?:2f|5c)~i', $encoded_path ); |
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|
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if ( |
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! is_array( $parsed ) |
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|| empty( $parsed['scheme'] ) |
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|| 'https' !== strtolower( $parsed['scheme'] ) |
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|| empty( $parsed['host'] ) |
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|| 'www.goodreads.com' !== strtolower( $parsed['host'] ) |
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|| isset( $parsed['user'] ) |
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|| isset( $parsed['pass'] ) |
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|| isset( $parsed['port'] ) |
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|| isset( $parsed['fragment'] ) |
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|| empty( $parsed['query'] ) |
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|| $has_encoded_separator |
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|| str_contains( $path, '\\' ) |
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) { |
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return ''; |
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} |
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|
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// Only the documented widget endpoints: a numeric Goodreads ID and a non-empty title. |
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// Goodreads treats literal slashes as part of the title, so allow them while |
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// rejecting dot segments that a URL parser could normalize outside this route. |
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if ( 1 !== preg_match( '~^/review/(custom|grid)_widget/[0-9]+\.(.+)$~', $path, $match ) ) { |
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return ''; |
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} |
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|
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foreach ( explode( '/', $match[2] ) as $title_segment ) { |
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if ( '.' === $title_segment || '..' === $title_segment ) { |
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return ''; |
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} |
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} |
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|
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$allowed_query_args = 'grid' === $match[1] |
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? array( 'cover_size', 'num_books', 'order', 'shelf', 'sort', 'widget_id' ) |
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: array( 'num_books', 'order', 'shelf', 'show_author', 'show_cover', 'show_rating', 'show_review', 'show_tags', 'show_title', 'sort', 'widget_id' ); |
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$query_args = array(); |
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|
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wp_parse_str( $parsed['query'], $query_args ); |
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|
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if ( array_diff( array_keys( $query_args ), $allowed_query_args ) ) { |
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return ''; |
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} |
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|
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foreach ( $query_args as $value ) { |
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if ( is_array( $value ) ) { |
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return ''; |
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} |
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} |
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|
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return 'https://www.goodreads.com' . $parsed['path'] . '?' . $parsed['query']; |
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} |
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|
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/** |
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* Dynamic rendering of the block. |
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* |
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* @param array $attr Array containing the Goodreads block attributes. |
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* |
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* @return string |
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*/ |
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function render_implementation( $attr ) { |
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Jetpack_Gutenberg::load_assets_as_required( __DIR__ ); |
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|
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if ( isset( $attr['id'] ) ) { |
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if ( isset( $attr['link'] ) ) { |
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$script_url = get_validated_script_url( $attr['link'] ); |
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|
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if ( '' !== $script_url ) { |
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wp_enqueue_script( |
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'jetpack-goodreads-' . esc_attr( $attr['id'] ), |
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$script_url, |
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array(), |
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JETPACK__VERSION, |
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true |
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); |
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} |
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} |
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|
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$id = esc_attr( $attr['id'] ); |
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} else { |
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$id = ''; |
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} |
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|
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$classes = esc_attr( Blocks::classes( Blocks::get_block_feature( __DIR__ ), $attr ) ); |
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|
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return sprintf( |
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'<div id="%1$s" class="%2$s"></div>', |
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$id, |
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$classes |
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); |
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} |
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|
