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<?php |
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/* HEADER */ // phpcs:ignore |
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/** |
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* This class loads other classes based on given parameters. |
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*/ |
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class Version_Loader { |
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/** |
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* The Version_Selector object. |
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* |
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* @var Version_Selector |
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*/ |
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private $version_selector; |
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/** |
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* A map of available classes and their version and file path. |
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* |
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* @var array |
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*/ |
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private $classmap; |
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/** |
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* A map of PSR-4 namespaces and their version and directory path. |
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* |
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* @var array |
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*/ |
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private $psr4_map; |
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/** |
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* A map of all the files that we should load. |
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* |
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* @var array |
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*/ |
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private $filemap; |
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/** |
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* The constructor. |
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* |
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* @param Version_Selector $version_selector The Version_Selector object. |
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* @param array $classmap The verioned classmap to load using. |
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* @param array $psr4_map The versioned PSR-4 map to load using. |
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* @param array $filemap The versioned filemap to load. |
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*/ |
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public function __construct( $version_selector, $classmap, $psr4_map, $filemap ) { |
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$this->version_selector = $version_selector; |
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$this->classmap = $classmap; |
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$this->psr4_map = $psr4_map; |
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$this->filemap = $filemap; |
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} |
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/** |
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* Finds the file path for the given class. |
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* |
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* @param string $class_name The class to find. |
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* |
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* @return string|null $file_path The path to the file if found, null if no class was found. |
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*/ |
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public function find_class_file( $class_name ) { |
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$data = $this->select_newest_file( |
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isset( $this->classmap[ $class_name ] ) ? $this->classmap[ $class_name ] : null, |
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$this->find_psr4_file( $class_name ) |
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); |
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if ( ! isset( $data ) ) { |
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return null; |
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} |
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return $data['path']; |
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} |
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/** |
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* Load all of the files in the filemap. |
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*/ |
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public function load_filemap() { |
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if ( empty( $this->filemap ) ) { |
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return; |
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} |
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foreach ( $this->filemap as $file_identifier => $file_data ) { |
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if ( empty( $GLOBALS['__composer_autoload_files'][ $file_identifier ] ) ) { |
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require_once $file_data['path']; |
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$GLOBALS['__composer_autoload_files'][ $file_identifier ] = true; |
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} |
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} |
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} |
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/** |
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* Compares different class sources and returns the newest. |
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* |
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* @param array|null $classmap_data The classmap class data. |
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* @param array|null $psr4_data The PSR-4 class data. |
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* |
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* @return array|null $data |
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*/ |
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private function select_newest_file( $classmap_data, $psr4_data ) { |
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if ( ! isset( $classmap_data ) ) { |
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return $psr4_data; |
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} elseif ( ! isset( $psr4_data ) ) { |
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return $classmap_data; |
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} |
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if ( $this->version_selector->is_version_update_required( $classmap_data['version'], $psr4_data['version'] ) ) { |
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return $psr4_data; |
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} |
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return $classmap_data; |
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} |
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/** |
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* Finds the file for a given class in a PSR-4 namespace. |
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* |
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* @param string $class_name The class to find. |
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* |
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* @return array|null $data The version and path path to the file if found, null otherwise. |
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*/ |
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private function find_psr4_file( $class_name ) { |
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if ( ! isset( $this->psr4_map ) ) { |
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return null; |
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} |
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// Don't bother with classes that have no namespace. |
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$class_index = strrpos( $class_name, '\\' ); |
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if ( ! $class_index ) { |
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return null; |
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} |
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$class_for_path = str_replace( '\\', '/', $class_name ); |
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// Search for the namespace by iteratively cutting off the last segment until |
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// we find a match. This allows us to check the most-specific namespaces |
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// first as well as minimize the amount of time spent looking. |
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for ( |
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$class_namespace = substr( $class_name, 0, $class_index ); |
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! empty( $class_namespace ); |
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$class_namespace = substr( $class_namespace, 0, strrpos( $class_namespace, '\\' ) ) |
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) { |
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$namespace = $class_namespace . '\\'; |
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if ( ! isset( $this->psr4_map[ $namespace ] ) ) { |
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continue; |
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} |
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$data = $this->psr4_map[ $namespace ]; |
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foreach ( $data['path'] as $path ) { |
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$path .= '/' . substr( $class_for_path, strlen( $namespace ) ) . '.php'; |
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if ( file_exists( $path ) ) { |
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return array( |
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'version' => $data['version'], |
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'path' => $path, |
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); |
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} |
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} |
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} |
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return null; |
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} |
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} |
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Automattic /
jetpack
