432 lines
11 KiB
PHP
432 lines
11 KiB
PHP
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<?php namespace ProcessWire;
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/**
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* ProcessWire class autoloader
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*
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* Similar to a PSR-4 autoloader but with knowledge of modules.
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*
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* #pw-summary The ProcessWire $classLoader API variable handles autoloading of classes and modules.
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* #pw-body =
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* This class loader is similar to a PSR-4 autoloader but with knowledge of modules.
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* #pw-body
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*
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* This file is licensed under the MIT license
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* https://processwire.com/about/license/mit/
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*
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* ProcessWire 3.x, Copyright 2020 by Ryan Cramer
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* https://processwire.com
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*
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*/
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class WireClassLoader {
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/**
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* @var Modules|null
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*
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*/
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protected $modules = null;
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/**
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* @var null|ProcessWire
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*
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*/
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protected $wire = null;
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/**
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* Extensions allowed for autoload files
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*
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* @var array
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*
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*/
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protected $extensions = array(
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'.php',
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);
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/**
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* Class name prefixes to paths
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*
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* @var array Indexed by prefix, values are arrays of paths
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*
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*/
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protected $prefixes = array();
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/**
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* Class name suffixes to paths
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*
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* @var array Indexed by suffix, values are arrays of paths
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*
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*/
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protected $suffixes = array();
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/**
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* True when finding file, string when file found, false when not active
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*
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* @var string|bool
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*
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*/
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protected $findFile = false;
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/**
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* @var array
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*
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*/
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static protected $namespaces = array();
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/**
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* Log of autoload activity when debug mode is on
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*
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* @var array
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*
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*/
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protected $debugLog = array();
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/**
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* Whether we are using debug mode
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*
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* @var bool
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*
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*/
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protected $debug = null;
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/**
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* @param ProcessWire $wire
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*
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*/
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public function __construct($wire = null) {
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if($wire) $this->wire = $wire;
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spl_autoload_register(array($this, 'loadClass'));
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}
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/**
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* Normalize a path
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*
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* @param string $path
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* @return string
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* @since 3.0.152
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*
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*/
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protected function path($path) {
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if(DIRECTORY_SEPARATOR !== '/') $path = str_replace(DIRECTORY_SEPARATOR, '/', $path);
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return rtrim($path, '/') . '/';
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}
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/**
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* Add a recognized file extension for PHP files
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*
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* Note: ".php" is already assumed, so does not need to be added.
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*
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* #pw-advanced
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*
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* @param string $ext
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*
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*/
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public function addExtension($ext) {
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if(strpos($ext, '.') !== 0) $ext = ".$ext";
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if(!in_array($ext, $this->extensions)) $this->extensions[] = $ext;
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}
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/**
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* Map a class suffix to a path
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*
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* This is used as a helper/fallback and class is not required to be in given path,
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* but the path will be added as another to check when not found in namespace path(s).
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*
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* @param string $suffix Case sensitive suffix specific to class name (not namespace).
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* @param string $path
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*
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*/
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public function addSuffix($suffix, $path) {
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if(!isset($this->suffixes[$suffix])) $this->suffixes[$suffix] = array();
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if(!empty($path) && is_dir($path)) $this->suffixes[$suffix][] = $this->path($path);
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}
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/**
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* Map a class prefix to a path
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*
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* This is used as a helper/fallback and class is not required to be in given path,
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* but the path will be added as another to check when not found in namespace path(s).
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*
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* @param string $prefix Case sensitive prefix specific to class name (not namespace).
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* @param string $path
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*
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*/
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public function addPrefix($prefix, $path) {
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if(!isset($this->prefixes[$prefix])) $this->prefixes[$prefix] = array();
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if(!empty($path) && is_dir($path)) $this->prefixes[$prefix][] = $this->path($path);
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}
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/**
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* Add a namespace to point to a path root
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*
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* Multiple root paths may be specified for a single namespace by calling this method more than once.
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*
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* ~~~~~
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* $classLoader->addNamespace('HelloWorld', '/path/to/that/');
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* ~~~~~
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*
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* @param string $namespace
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* @param string $path Full system path
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*
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*/
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public function addNamespace($namespace, $path) {
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if(!isset(self::$namespaces[$namespace])) self::$namespaces[$namespace] = array();
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$path = $this->path($path);
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if(!in_array($path, self::$namespaces[$namespace])) self::$namespaces[$namespace][] = $path;
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}
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/**
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* Return array of paths for the given namespace, or empty array if none found
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*
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* @param string $namespace
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* @return array of paths or empty array if none found
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*
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*/
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public function getNamespace($namespace) {
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return isset(self::$namespaces[$namespace]) ? self::$namespaces[$namespace] : array();
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}
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/**
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* Return true if namespace is defined with paths or false if not
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*
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* @param string $namespace
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* @return bool
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*
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*/
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public function hasNamespace($namespace) {
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return isset(self::$namespaces[$namespace]);
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}
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/**
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* Remove defined paths (or single path) for given namespace
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*
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* @param string $namespace
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* @param string $path Optionally specify path to remove (default=remove all)
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*
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*/
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public function removeNamespace($namespace, $path = '') {
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if(strlen($path)) {
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$key = array_search($path, self::$namespaces[$namespace]);
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if($key !== false) unset(self::$namespaces[$namespace][$key]);
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} else {
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unset(self::$namespaces[$namespace]);
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}
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}
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/**
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* Find filename for given class name (primarily for API testing/debugging purposes)
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*
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* @param string $className Class name with namespace
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* @return bool|string Returns file on success or boolean false when not found
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* @since 3.0.152
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*
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*/
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public function findClassFile($className) {
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$this->findFile = true;
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$this->loadClass($className);
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$file = is_string($this->findFile) ? $this->findFile : false;
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$this->findFile = false;
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return $file;
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}
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/**
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* Load the file for the given class
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*
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* #pw-advanced
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*
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* @param string $className
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*
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*/
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public function loadClass($className) {
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static $level = 0;
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static $levelHistory = array();
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$level++;
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if($this->modules === null && $this->wire) {
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$this->modules = $this->wire->wire('modules');
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}
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if($this->debug === null && $this->wire) {
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$this->debug = $this->wire->wire('config')->debug;
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}
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if($this->debug) {
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$_className = str_replace(__NAMESPACE__ . '\\', '', $className);
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$levelHistoryStr = count($levelHistory) ? ' (via ' . implode(' > ', $levelHistory) . ')' : '';
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$levelHistory[] = $_className;
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} else {
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$levelHistoryStr = '';
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$_className = '';
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}
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$found = false;
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$_parts = array();
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if(__NAMESPACE__) {
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$parts = explode("\\", $className);
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$name = array_pop($parts);
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$namespace = implode("\\", $parts);
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} else {
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$_parts = array();
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if(strpos($className, "\\") !== false) {
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$parts = explode("\\", $className);
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$name = array_pop($parts);
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$namespace = implode("\\", $parts);
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} else {
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$name = $className;
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$namespace = "\\";
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}
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}
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$_namespace = $namespace; // original and unmodified namespace
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if($this->modules && $this->modules->isModule($className)) {
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if($this->modules->includeModule($name)) {
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// success, and Modules class just included it
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if($this->findFile === true) {
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$this->findFile = $this->modules->getModuleFile($name);
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}
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if($this->debug) {
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$this->debugLog[$_className] = "Handled by modules loader" . $levelHistoryStr;
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array_pop($levelHistory);
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}
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$level--;
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return;
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}
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}
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while($namespace && !isset(self::$namespaces[$namespace])) {
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$_parts[] = array_pop($parts);
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$namespace = implode("\\", $parts);
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}
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if($namespace) {
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$paths = self::$namespaces[$namespace];
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$dir = count($_parts) ? implode('/', array_reverse($_parts)) . '/' : '';
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$found = $this->findClassInPaths($name, $paths, $dir);
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}
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if(!$found && $this->modules && $_namespace) {
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// if namespace is for a known module, see if we can find a file in that module’s directory
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// with the same name as the request class
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// @todo psr-4 support for these
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$path = $this->modules->getNamespacePath($_namespace);
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if($path) $found = $this->findClassInPaths($name, $path);
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}
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if(!$found && (!empty($this->prefixes) || !empty($this->suffixes))) {
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$found = $this->findInPrefixSuffixPaths($name);
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}
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if($found) {
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/** @noinspection PhpIncludeInspection */
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include_once($found);
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if($this->debug) {
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$file = $this->wire ? str_replace($this->wire->wire('config')->paths->root, '/', $found) : $found;
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$this->debugLog[$_className] = $file . $levelHistoryStr;
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}
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if($this->findFile === true && $level === 1) {
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$this->findFile = $found;
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}
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} else if($this->debug) {
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$this->debugLog[$_className] = "Unable to locate file for this class" . $levelHistoryStr;
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}
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$level--;
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if($this->debug) array_pop($levelHistory);
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}
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/**
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* Find class file among given paths and return full pathname to file if found
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*
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* @param string $name Class name without namespace
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* @param string|array $paths Path(s) to check
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* @param string $dir Optional directory string to append to each path, must not start with slash but must end with slash, i.e. "dir/"
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* @return string|bool Returns full path+filename when found or boolean false when not found
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* @since 3.0.152
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*
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*/
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protected function findClassInPaths($name, $paths, $dir = '') {
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$found = false;
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if(!is_array($paths)) $paths = array($paths);
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foreach($paths as $path) {
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foreach($this->extensions as $ext) {
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$file = "$path$dir$name$ext";
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if(!is_file($file)) continue;
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$found = $file;
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break;
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}
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if($found) break;
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}
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return $found;
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}
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/**
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* Check prefix and suffix definition paths for given class name and return file if found
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|||
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*
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* @param string $name Class name without namespace
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|||
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* @return bool|string Returns filename on success or boolean false if not found
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|||
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* @since 3.0.152
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*
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*/
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protected function findInPrefixSuffixPaths($name) {
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$found = false;
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foreach(array('prefixes', 'suffixes') as $type) {
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foreach($this->$type as $fix => $paths) {
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// if class exactly matches prefix/suffix, it is the full class name and not allowed
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if($name === $fix || empty($fix)) continue;
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// determine where the prefix/suffix appears in the class name
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|||
|
|
$pos = strpos($name, $fix);
|
|||
|
|
|
|||
|
|
// prefix/suffix does not appear in class name
|
|||
|
|
if($pos === false) continue;
|
|||
|
|
|
|||
|
|
if($type === 'prefixes') {
|
|||
|
|
// prefixes: class name must begin with prefix
|
|||
|
|
if($pos !== 0) continue;
|
|||
|
|
} else {
|
|||
|
|
// suffixes: class name must end with suffix
|
|||
|
|
if(substr($name, -1 * strlen($fix)) !== $fix) continue;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// if still here then we have a class name that matches a prefix/suffix, check if in path
|
|||
|
|
$found = $this->findClassInPaths($name, $paths);
|
|||
|
|
if($found) break;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if($found) break;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return $found;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Enable or disable debug mode
|
|||
|
|
*
|
|||
|
|
* #pw-internal
|
|||
|
|
*
|
|||
|
|
* @param bool $debug
|
|||
|
|
*
|
|||
|
|
*/
|
|||
|
|
public function setDebug($debug) {
|
|||
|
|
$this->debug = (bool) $debug;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Get log of debug events
|
|||
|
|
*
|
|||
|
|
* #pw-internal
|
|||
|
|
*
|
|||
|
|
* @return array of strings
|
|||
|
|
*
|
|||
|
|
*/
|
|||
|
|
public function getDebugLog() {
|
|||
|
|
return $this->debugLog;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|