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<?php /** * Class 'WP_URL_Pattern_Prefixer'. * * @package WordPress * @subpackage Speculative Loading * @since 6.8.0 / /* * Class for prefixing URL patterns. * * This class is intended primarily for use as part of the speculative loading feature. * * @since 6.8.0 * @access private / class WP_URL_Pattern_Prefixer { /* * Map of `$context_string => $base_path` pairs. * * @since 6.8.0 * @var array<string, string> / private $contexts; /* * Constructor. * * @since 6.8.0 * * @param array<string, string> $contexts Optional. Map of `$context_string => $base_path` pairs. Default is the * contexts returned by the * {@see WP_URL_Pattern_Prefixer::get_default_contexts()} method. / public function __construct( array $contexts = array() ) { if ( count( $contexts ) > 0 ) { $this->contexts = array_map( static function ( string $str ): string { return self::escape_pattern_string( trailingslashit( $str ) ); }, $contexts ); } else { $this->contexts = self::get_default_contexts(); } } /* * Prefixes the given URL path pattern with the base path for the given context. * * This ensures that these path patterns work correctly on WordPress subdirectory sites, for example in a multisite * network, or when WordPress itself is installed in a subdirectory of the hostname. * * The given URL path pattern is only prefixed if it does not already include the expected prefix. * * @since 6.8.0 * * @param string $path_pattern URL pattern starting with the path segment. * @param string $context Optional. Context to use for prefixing the path pattern. Default 'home'. * @return string URL pattern, prefixed as necessary. / public function prefix_path_pattern( string $path_pattern, string $context = 'home' ): string { // If context path does not exist, the context is invalid. if ( ! isset( $this->contexts[ $context ] ) ) { _doing_it_wrong( __FUNCTION__, esc_html( sprintf( / translators: %s: context string / __( 'Invalid URL pattern context %s.' ), $context ) ), '6.8.0' ); return $path_pattern; } / * In the event that the context path contains a :, ? or # (which can cause the URL pattern parser to switch to * another state, though only the latter two should be percent encoded anyway), it additionally needs to be * enclosed in grouping braces. The final forward slash (trailingslashit ensures there is one) affects the * meaning of the * wildcard, so is left outside the braces. / $context_path = $this->contexts[ $context ]; $escaped_context_path = $context_path; if ( strcspn( $context_path, ':?#' ) !== strlen( $context_path ) ) { $escaped_context_path = '{' . substr( $context_path, 0, -1 ) . '}/'; } / * If the path already starts with the context path (including '/'), remove it first * since it is about to be added back. / if ( str_starts_with( $path_pattern, $context_path ) ) { $path_pattern = substr( $path_pattern, strlen( $context_path ) ); } return $escaped_context_path . ltrim( $path_pattern, '/' ); } /* * Returns the default contexts used by the class. * * @since 6.8.0 * * @return array<string, string> Map of `$context_string => $base_path` pairs. / public static function get_default_contexts(): array { return array( 'home' => self::escape_pattern_string( trailingslashit( (string) wp_parse_url( home_url( '/' ), PHP_URL_PATH ) ) ), 'site' => self::escape_pattern_string( trailingslashit( (string) wp_parse_url( site_url( '/' ), PHP_URL_PATH ) ) ), 'uploads' => self::escape_pattern_string( trailingslashit( (string) wp_parse_url( wp_upload_dir( null, false )['baseurl'], PHP_URL_PATH ) ) ), 'content' => self::escape_pattern_string( trailingslashit( (string) wp_parse_url( content_url(), PHP_URL_PATH ) ) ), 'plugins' => self::escape_pattern_string( trailingslashit( (string) wp_parse_url( plugins_url(), PHP_URL_PATH ) ) ), 'template' => self::escape_pattern_string( trailingslashit( (string) wp_parse_url( get_stylesheet_directory_uri(), PHP_URL_PATH ) ) ), 'stylesheet' => self::escape_pattern_string( trailingslashit( (string) wp_parse_url( get_template_directory_uri(), PHP_URL_PATH ) ) ), ); } /* * Escapes a string for use in a URL pattern component. * * @since 6.8.0 * @see https://urlpattern.spec.whatwg.org/#escape-a-pattern-string * * @param string $str String to be escaped. * @return string String with backslashes added where required. / private static function escape_pattern_string( string $str ): string { return addcslashes( $str, '+?:{}()\\' ); } }