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<?php |
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/** |
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* Autoloader for Nodeinfo. |
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* |
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* @package Nodeinfo |
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*/ |
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|
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namespace Nodeinfo; |
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|
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/** |
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* An Autoloader that respects WordPress filename standards. |
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*/ |
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class Autoloader { |
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|
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/** |
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* Namespace separator. |
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*/ |
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const NS_SEPARATOR = '\\'; |
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|
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/** |
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* The prefix to compare classes against. |
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* |
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* @var string |
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*/ |
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protected $prefix; |
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|
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/** |
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* Length of the prefix string. |
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* |
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* @var int |
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*/ |
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protected $prefix_length; |
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|
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/** |
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* Path to the files to be loaded. |
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* |
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* @var string |
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*/ |
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protected $path; |
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|
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/** |
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* Constructor. |
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* |
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* @param string $prefix Namespace prefix all classes have in common. |
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* @param string $path Path to the files to be loaded. |
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*/ |
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public function __construct( $prefix, $path ) { |
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$this->prefix = $prefix; |
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$this->prefix_length = \strlen( $prefix ); |
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$this->path = \trailingslashit( $path ); |
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} |
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|
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/** |
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* Registers the autoloader. |
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* |
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* @param string $prefix Namespace prefix all classes have in common. |
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* @param string $path Path to the files to be loaded. |
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*/ |
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public static function register_path( $prefix, $path ) { |
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$loader = new self( $prefix, $path ); |
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\spl_autoload_register( array( $loader, 'load' ) ); |
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} |
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|
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/** |
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* Loads a class if its namespace starts with `$this->prefix`. |
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* |
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* @param string $class_name The class to be loaded. |
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*/ |
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public function load( $class_name ) { |
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if ( \strpos( $class_name, $this->prefix . self::NS_SEPARATOR ) !== 0 ) { |
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return; |
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} |
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|
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// Strip prefix from the start (PSR-4 style). |
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$class_name = \substr( $class_name, $this->prefix_length + 1 ); |
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$class_name = \strtolower( $class_name ); |
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$dir = ''; |
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|
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$last_ns_pos = \strripos( $class_name, self::NS_SEPARATOR ); |
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if ( false !== $last_ns_pos ) { |
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$namespace = \substr( $class_name, 0, $last_ns_pos ); |
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$namespace = \str_replace( '_', '-', $namespace ); |
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$class_name = \substr( $class_name, $last_ns_pos + 1 ); |
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$dir = \str_replace( self::NS_SEPARATOR, DIRECTORY_SEPARATOR, $namespace ) . DIRECTORY_SEPARATOR; |
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} |
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|
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$class_name = \str_replace( '_', '-', $class_name ); |
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$path = $this->path . $dir . 'class-' . $class_name . '.php'; |
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|
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if ( \file_exists( $path ) ) { |
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require_once $path; |
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} |
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} |
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} |
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|
