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<?php |
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|
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declare(strict_types=1); |
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|
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namespace RenzoJohnson\Blocks\Assets; |
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|
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use RenzoJohnson\Blocks\Vendor\JShrink\Minifier; |
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|
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\defined( 'ABSPATH' ) || exit; |
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|
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// phpcs:disable WordPress.WP.AlternativeFunctions -- Atomic local cache creation requires same-filesystem locks and renames; WP_Filesystem may request credentials and has no flock primitive. |
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final class JavaScriptAssetOptimizer { |
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private const CACHE_DIRECTORY = 'blocks-js-cache'; |
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private const COMPILER_ID = 'jshrink-1.8.1-blocks-prefix-2'; |
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private const ENABLED_OPTION = 'blocks_perf_minify_js'; |
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private const EXTRA_OPTION = 'blocks_perf_minify_js_handles'; |
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private const RETENTION_SECONDS = 2592000; |
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private const DEFAULT_HANDLES = array( |
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'blocks-frontend', |
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'blocks-analytics', |
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'blocks-livechat', |
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'blocks-geo-init', |
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); |
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|
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public function __construct( private readonly \Blocks_Settings_Repository $settings ) { |
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} |
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|
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public function register_hooks(): void { |
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if ( $this->settings->get_bool( self::ENABLED_OPTION ) ) { |
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\add_filter( 'script_loader_src', $this->filter_source( ... ), 9000, 2 ); |
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} |
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} |
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|
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public function filter_source( string $src, string $handle ): string { |
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if ( |
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\is_admin() |
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|| ! $this->settings->get_bool( self::ENABLED_OPTION ) |
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|| '' === $src |
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|| ! \in_array( $handle, $this->selected_handles(), true ) |
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) { |
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return $src; |
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} |
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|
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$resolved = $this->resolve_source( $src ); |
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if ( null === $resolved ) { |
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return $src; |
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} |
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|
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$source = $this->read_file( $resolved['path'] ); |
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if ( null === $source || '' === $source ) { |
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return $src; |
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} |
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|
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$location = self::cache_location( true ); |
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if ( null === $location ) { |
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return $src; |
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} |
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|
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$cached_url = $this->cache_source( $resolved['relative'], $source, $location ); |
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|
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return '' !== $cached_url ? $cached_url : $src; |
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} |
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|
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public static function uninstall(): void { |
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$location = self::cache_location( false ); |
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if ( null === $location ) { |
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return; |
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} |
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|
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$entries = \array_merge( |
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self::glob_paths( $location['directory'] . DIRECTORY_SEPARATOR . '*.min.js' ), |
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self::glob_paths( $location['directory'] . DIRECTORY_SEPARATOR . '.lock-*' ), |
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self::glob_paths( $location['directory'] . DIRECTORY_SEPARATOR . '.tmp-*' ) |
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); |
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|
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foreach ( $entries as $entry ) { |
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$name = \basename( $entry ); |
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if ( |
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\is_link( $entry ) |
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|| ! \is_file( $entry ) |
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|| ( |
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1 !== \preg_match( '/\A[A-Za-z0-9._-]+-[a-f0-9]{16}-[a-f0-9]{16}\.min\.js\z/', $name ) |
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&& 1 !== \preg_match( '/\A\.lock-[a-f0-9]{16}\z/', $name ) |
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&& 1 !== \preg_match( '/\A\.tmp-[a-f0-9]{16}-[A-Za-z0-9]+\z/', $name ) |
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) |
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) { |
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continue; |
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} |
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self::quiet_filesystem( static fn (): bool => \unlink( $entry ) ); |
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} |
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|
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self::quiet_filesystem( static fn (): bool => \rmdir( $location['directory'] ) ); |
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} |
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|
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/** @return array<int, string> */ |
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private function selected_handles(): array { |
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$extra = \preg_split( '/\R/', $this->settings->get_string( self::EXTRA_OPTION ) ); |
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$extra = false === $extra ? array() : \array_filter( \array_map( 'trim', $extra ) ); |
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|
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return \array_values( \array_unique( \array_merge( self::DEFAULT_HANDLES, $extra ) ) ); |
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} |
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|
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/** @return array{path:string,relative:string}|null */ |
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private function resolve_source( string $src ): ?array { |
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$source_parts = \wp_parse_url( \html_entity_decode( $src, ENT_QUOTES | ENT_HTML5, 'UTF-8' ) ); |
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$content_parts = \wp_parse_url( \content_url( '/' ) ); |
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if ( ! \is_array( $source_parts ) || ! \is_array( $content_parts ) || ! $this->same_authority( $source_parts, $content_parts ) ) { |
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return null; |
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} |
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|
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$source_path = isset( $source_parts['path'] ) && \is_string( $source_parts['path'] ) ? \rawurldecode( $source_parts['path'] ) : ''; |
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$content_path = isset( $content_parts['path'] ) && \is_string( $content_parts['path'] ) ? \rawurldecode( $content_parts['path'] ) : ''; |
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if ( '' === $source_path || '' === $content_path || \str_contains( $source_path, "\0" ) ) { |
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return null; |
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} |
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|
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$prefix = \trailingslashit( $content_path ); |
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if ( ! \str_starts_with( $source_path, $prefix ) ) { |
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return null; |
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} |
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|
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$relative = \ltrim( \substr( $source_path, \strlen( $prefix ) ), '/' ); |
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if ( |
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'' === $relative |
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|| 1 !== \preg_match( '/\.js\z/i', $relative ) |
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|| 1 === \preg_match( '/\.min\.js\z/i', $relative ) |
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) { |
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return null; |
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} |
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|
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$content_root = \realpath( WP_CONTENT_DIR ); |
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$file = \realpath( WP_CONTENT_DIR . DIRECTORY_SEPARATOR . \str_replace( '/', DIRECTORY_SEPARATOR, $relative ) ); |
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if ( |
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! \is_string( $content_root ) |
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|| ! \is_string( $file ) |
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|| ! \str_starts_with( $file, $content_root . DIRECTORY_SEPARATOR ) |
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|| ! \is_file( $file ) |
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|| ! \is_readable( $file ) |
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) { |
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return null; |
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} |
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|
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return array( |
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'path' => $file, |
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'relative' => \str_replace( DIRECTORY_SEPARATOR, '/', \substr( $file, \strlen( $content_root ) + 1 ) ), |
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); |
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} |
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|
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/** |
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* @param array<string, mixed> $source Source URL parts. |
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* @param array<string, mixed> $content Content URL parts. |
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*/ |
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private function same_authority( array $source, array $content ): bool { |
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if ( isset( $source['user'] ) || isset( $source['pass'] ) ) { |
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return false; |
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} |
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$source_scheme = isset( $source['scheme'] ) && \is_string( $source['scheme'] ) ? \strtolower( $source['scheme'] ) : null; |
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$content_scheme = isset( $content['scheme'] ) && \is_string( $content['scheme'] ) ? \strtolower( $content['scheme'] ) : null; |
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if ( ! isset( $source['host'] ) ) { |
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return null === $source_scheme; |
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} |
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if ( |
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null === $source_scheme |
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|| null === $content_scheme |
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|| ! \in_array( $source_scheme, array( 'http', 'https' ), true ) |
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|| ! \in_array( $content_scheme, array( 'http', 'https' ), true ) |
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|| $source_scheme !== $content_scheme |
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|| ! isset( $content['host'] ) |
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|| ! \is_string( $source['host'] ) |
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|| ! \is_string( $content['host'] ) |
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) { |
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return false; |
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} |
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if ( \strtolower( $source['host'] ) !== \strtolower( $content['host'] ) ) { |
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return false; |
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} |
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|
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if ( ( isset( $source['port'] ) && ! \is_int( $source['port'] ) ) || ( isset( $content['port'] ) && ! \is_int( $content['port'] ) ) ) { |
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return false; |
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} |
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$source_port = isset( $source['port'] ) && \is_int( $source['port'] ) ? $source['port'] : null; |
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$content_port = isset( $content['port'] ) && \is_int( $content['port'] ) ? $content['port'] : null; |
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if ( null === $source_port && null === $content_port ) { |
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return true; |
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} |
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|
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$default_port = 'http' === $content_scheme ? 80 : 443; |
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|
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return ( $source_port ?? $default_port ) === ( $content_port ?? $default_port ); |
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} |
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|
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private function read_file( string $path ): ?string { |
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$content = self::quiet_filesystem( static fn (): string|false => \file_get_contents( $path ) ); |
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|
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return \is_string( $content ) ? $content : null; |
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} |
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|
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/** @return array{directory:string,url:string}|null */ |
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private static function cache_location( bool $create ): ?array { |
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$uploads = \wp_upload_dir( null, false ); |
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if ( |
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! empty( $uploads['error'] ) |
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|| ! isset( $uploads['basedir'], $uploads['baseurl'] ) |
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|| ! \is_string( $uploads['basedir'] ) |
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|| ! \is_string( $uploads['baseurl'] ) |
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) { |
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return null; |
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} |
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|
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$base = \realpath( $uploads['basedir'] ); |
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if ( ! \is_string( $base ) ) { |
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return null; |
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} |
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|
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$expected = $base . DIRECTORY_SEPARATOR . self::CACHE_DIRECTORY; |
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if ( $create && ! \is_dir( $expected ) && ! \wp_mkdir_p( $expected ) ) { |
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return null; |
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} |
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|
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$directory = \realpath( $expected ); |
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if ( ! \is_string( $directory ) || $directory !== $expected || ! \is_dir( $directory ) ) { |
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return null; |
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} |
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|
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return array( |
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'directory' => $directory, |
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'url' => \trailingslashit( $uploads['baseurl'] ) . self::CACHE_DIRECTORY . '/', |
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); |
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} |
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|
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/** @param array{directory:string,url:string} $location */ |
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private function cache_source( string $relative, string $source, array $location ): string { |
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$path_hash = \substr( \hash( 'sha256', $relative ), 0, 16 ); |
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$content_hash = \substr( \hash( 'sha256', self::COMPILER_ID . "\0" . $relative . "\0" . $source ), 0, 16 ); |
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$stem = \sanitize_file_name( \pathinfo( $relative, PATHINFO_FILENAME ) ); |
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$stem = '' !== $stem ? $stem : 'script'; |
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$filename = $stem . '-' . $path_hash . '-' . $content_hash . '.min.js'; |
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$destination = $location['directory'] . DIRECTORY_SEPARATOR . $filename; |
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$lock_path = $location['directory'] . DIRECTORY_SEPARATOR . '.lock-' . $path_hash; |
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|
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if ( $this->valid_cache_file( $destination ) ) { |
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return $location['url'] . \rawurlencode( $filename ); |
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} |
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if ( \is_link( $destination ) || ( \file_exists( $destination ) && ! \is_file( $destination ) ) || \is_link( $lock_path ) ) { |
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return ''; |
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} |
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|
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$lock = self::quiet_filesystem( static fn () => \fopen( $lock_path, 'c' ) ); |
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if ( ! \is_resource( $lock ) ) { |
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return ''; |
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} |
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|
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$temporary = null; |
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try { |
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if ( ! \flock( $lock, LOCK_EX ) ) { |
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return ''; |
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} |
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if ( $this->valid_cache_file( $destination ) ) { // @phpstan-ignore if.alwaysFalse (Another process may fill the cache while this request waits for the lock.) |
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return $location['url'] . \rawurlencode( $filename ); |
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} |
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if ( \is_file( $destination ) && ! \is_link( $destination ) ) { // @phpstan-ignore booleanNot.alwaysTrue (Reject a path swapped to a symlink while this request waited.) |
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self::quiet_filesystem( static fn (): bool => \unlink( $destination ) ); |
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} |
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|
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$vendor = BLOCKS_PLUGIN_DIR . '/includes/jshrink/src/Minifier.php'; |
| 266 |
if ( ! \is_file( $vendor ) ) { |
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return ''; |
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} |
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require_once $vendor; |
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|
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try { |
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$minified = Minifier::minify( $source, array( 'flaggedComments' => true ) ); |
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} catch ( \Throwable ) { |
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return ''; |
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} |
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if ( ! \is_string( $minified ) || '' === $minified || \strlen( $minified ) >= \strlen( $source ) ) { |
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return ''; |
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} |
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|
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$temporary = self::quiet_filesystem( static fn (): string|false => \tempnam( $location['directory'], '.tmp-' . $path_hash . '-' ) ); |
| 281 |
if ( ! \is_string( $temporary ) ) { |
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return ''; |
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} |
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$written = self::quiet_filesystem( static fn (): int|false => \file_put_contents( $temporary, $minified, LOCK_EX ) ); |
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$mode_set = self::quiet_filesystem( static fn (): bool => \chmod( $temporary, 0644 ) ); |
| 286 |
if ( \strlen( $minified ) !== $written || true !== $mode_set ) { |
| 287 |
return ''; |
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} |
| 289 |
if ( true !== self::quiet_filesystem( static fn (): bool => \rename( $temporary, $destination ) ) ) { |
| 290 |
return ''; |
| 291 |
} |
| 292 |
$temporary = null; |
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$this->prune_old_cache_files( $location['directory'], $filename ); |
| 294 |
|
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return $location['url'] . \rawurlencode( $filename ); |
| 296 |
} finally { |
| 297 |
\flock( $lock, LOCK_UN ); |
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self::quiet_filesystem( static fn (): bool => \fclose( $lock ) ); |
| 299 |
if ( \is_string( $temporary ) && \is_file( $temporary ) && ! \is_link( $temporary ) ) { |
| 300 |
self::quiet_filesystem( static fn (): bool => \unlink( $temporary ) ); |
| 301 |
} |
| 302 |
} |
| 303 |
} |
| 304 |
|
| 305 |
private function valid_cache_file( string $path ): bool { |
| 306 |
if ( \is_link( $path ) || ! \is_file( $path ) ) { |
| 307 |
return false; |
| 308 |
} |
| 309 |
$size = self::quiet_filesystem( static fn (): int|false => \filesize( $path ) ); |
| 310 |
|
| 311 |
return \is_int( $size ) && $size > 0; |
| 312 |
} |
| 313 |
|
| 314 |
private function prune_old_cache_files( string $directory, string $current ): void { |
| 315 |
$entries = self::glob_paths( $directory . DIRECTORY_SEPARATOR . '*.min.js' ); |
| 316 |
$cutoff = \time() - self::RETENTION_SECONDS; |
| 317 |
foreach ( $entries as $entry ) { |
| 318 |
$name = \basename( $entry ); |
| 319 |
if ( |
| 320 |
$current === $name |
| 321 |
|| \is_link( $entry ) |
| 322 |
|| ! \is_file( $entry ) |
| 323 |
|| 1 !== \preg_match( '/\A[A-Za-z0-9._-]+-[a-f0-9]{16}-[a-f0-9]{16}\.min\.js\z/', $name ) |
| 324 |
|| $this->is_recent( $entry, $cutoff ) |
| 325 |
) { |
| 326 |
continue; |
| 327 |
} |
| 328 |
self::quiet_filesystem( static fn (): bool => \unlink( $entry ) ); |
| 329 |
} |
| 330 |
} |
| 331 |
|
| 332 |
private function is_recent( string $path, int $cutoff ): bool { |
| 333 |
$modified = self::quiet_filesystem( static fn (): int|false => \filemtime( $path ) ); |
| 334 |
|
| 335 |
return false === $modified || $modified >= $cutoff; |
| 336 |
} |
| 337 |
|
| 338 |
/** @return array<int, string> */ |
| 339 |
private static function glob_paths( string $pattern ): array { |
| 340 |
$paths = self::quiet_filesystem( static fn (): array|false => \glob( $pattern ) ); |
| 341 |
|
| 342 |
return \is_array( $paths ) ? $paths : array(); |
| 343 |
} |
| 344 |
|
| 345 |
private static function quiet_filesystem( callable $operation ): mixed { |
| 346 |
// phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_set_error_handler -- Expected file failures must fail open without leaking warnings into frontend output. |
| 347 |
\set_error_handler( static fn (): bool => true ); |
| 348 |
try { |
| 349 |
return $operation(); |
| 350 |
} finally { |
| 351 |
\restore_error_handler(); |
| 352 |
} |
| 353 |
} |
| 354 |
} |
| 355 |
// phpcs:enable WordPress.WP.AlternativeFunctions |
| 356 |
|
