329 lines
9.1 KiB
PHP
329 lines
9.1 KiB
PHP
<?php
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/**
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* This file is part of CodeIgniter 4 framework.
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*
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* (c) CodeIgniter Foundation <admin@codeigniter.com>
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*
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* For the full copyright and license information, please view
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* the LICENSE file that was distributed with this source code.
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*/
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namespace CodeIgniter\Autoloader;
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use Composer\Autoload\ClassLoader;
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use Config\Autoload;
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use Config\Modules;
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use InvalidArgumentException;
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/**
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* An autoloader that uses both PSR4 autoloading, and traditional classmaps.
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*
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* Given a foo-bar package of classes in the file system at the following paths:
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* ```
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* /path/to/packages/foo-bar/
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* /src
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* Baz.php # Foo\Bar\Baz
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* Qux/
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* Quux.php # Foo\Bar\Qux\Quux
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* ```
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* you can add the path to the configuration array that is passed in the constructor.
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* The Config array consists of 2 primary keys, both of which are associative arrays:
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* 'psr4', and 'classmap'.
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* ```
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* $Config = [
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* 'psr4' => [
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* 'Foo\Bar' => '/path/to/packages/foo-bar'
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* ],
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* 'classmap' => [
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* 'MyClass' => '/path/to/class/file.php'
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* ]
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* ];
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* ```
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* Example:
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* ```
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* <?php
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* // our configuration array
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* $Config = [ ... ];
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* $loader = new \CodeIgniter\Autoloader\Autoloader($Config);
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*
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* // register the autoloader
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* $loader->register();
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* ```
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*/
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class Autoloader
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{
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/**
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* Stores namespaces as key, and path as values.
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*
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* @var array<string, array<string>>
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*/
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protected $prefixes = [];
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/**
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* Stores class name as key, and path as values.
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*
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* @var array<string, string>
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*/
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protected $classmap = [];
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/**
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* Stores files as a list.
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*
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* @var array<int, string>
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*/
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protected $files = [];
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/**
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* Reads in the configuration array (described above) and stores
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* the valid parts that we'll need.
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*
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* @return $this
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*/
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public function initialize(Autoload $config, Modules $modules)
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{
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// We have to have one or the other, though we don't enforce the need
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// to have both present in order to work.
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if (empty($config->psr4) && empty($config->classmap)) {
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throw new InvalidArgumentException('Config array must contain either the \'psr4\' key or the \'classmap\' key.');
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}
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if (isset($config->psr4)) {
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$this->addNamespace($config->psr4);
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}
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if (isset($config->classmap)) {
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$this->classmap = $config->classmap;
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}
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if (isset($config->files)) {
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$this->files = $config->files;
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}
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// Should we load through Composer's namespaces, also?
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if ($modules->discoverInComposer) {
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$this->discoverComposerNamespaces();
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}
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return $this;
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}
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/**
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* Register the loader with the SPL autoloader stack.
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*/
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public function register()
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{
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// Prepend the PSR4 autoloader for maximum performance.
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spl_autoload_register([$this, 'loadClass'], true, true);
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// Now prepend another loader for the files in our class map.
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spl_autoload_register([$this, 'loadClassmap'], true, true);
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// Load our non-class files
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foreach ($this->files as $file) {
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if (is_string($file)) {
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$this->includeFile($file);
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}
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}
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}
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/**
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* Registers namespaces with the autoloader.
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*
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* @param array|string $namespace
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*
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* @return $this
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*/
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public function addNamespace($namespace, ?string $path = null)
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{
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if (is_array($namespace)) {
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foreach ($namespace as $prefix => $namespacedPath) {
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$prefix = trim($prefix, '\\');
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if (is_array($namespacedPath)) {
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foreach ($namespacedPath as $dir) {
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$this->prefixes[$prefix][] = rtrim($dir, '\\/') . DIRECTORY_SEPARATOR;
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}
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continue;
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}
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$this->prefixes[$prefix][] = rtrim($namespacedPath, '\\/') . DIRECTORY_SEPARATOR;
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}
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} else {
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$this->prefixes[trim($namespace, '\\')][] = rtrim($path, '\\/') . DIRECTORY_SEPARATOR;
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}
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return $this;
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}
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/**
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* Get namespaces with prefixes as keys and paths as values.
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*
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* If a prefix param is set, returns only paths to the given prefix.
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*
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* @return array
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*/
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public function getNamespace(?string $prefix = null)
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{
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if ($prefix === null) {
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return $this->prefixes;
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}
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return $this->prefixes[trim($prefix, '\\')] ?? [];
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}
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/**
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* Removes a single namespace from the psr4 settings.
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*
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* @return $this
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*/
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public function removeNamespace(string $namespace)
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{
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if (isset($this->prefixes[trim($namespace, '\\')])) {
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unset($this->prefixes[trim($namespace, '\\')]);
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}
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return $this;
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}
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/**
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* Load a class using available class mapping.
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*
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* @return false|string
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*/
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public function loadClassmap(string $class)
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{
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$file = $this->classmap[$class] ?? '';
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if (is_string($file) && $file !== '') {
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return $this->includeFile($file);
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}
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return false;
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}
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/**
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* Loads the class file for a given class name.
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*
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* @param string $class The fully qualified class name.
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*
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* @return false|string The mapped file on success, or boolean false
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* on failure.
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*/
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public function loadClass(string $class)
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{
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$class = trim($class, '\\');
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$class = str_ireplace('.php', '', $class);
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return $this->loadInNamespace($class);
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}
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/**
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* Loads the class file for a given class name.
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*
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* @param string $class The fully-qualified class name
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*
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* @return false|string The mapped file name on success, or boolean false on fail
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*/
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protected function loadInNamespace(string $class)
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{
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if (strpos($class, '\\') === false) {
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return false;
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}
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foreach ($this->prefixes as $namespace => $directories) {
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foreach ($directories as $directory) {
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$directory = rtrim($directory, '\\/');
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if (strpos($class, $namespace) === 0) {
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$filePath = $directory . str_replace('\\', DIRECTORY_SEPARATOR, substr($class, strlen($namespace))) . '.php';
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$filename = $this->includeFile($filePath);
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if ($filename) {
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return $filename;
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}
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}
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}
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}
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// never found a mapped file
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return false;
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}
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/**
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* A central way to include a file. Split out primarily for testing purposes.
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*
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* @return false|string The filename on success, false if the file is not loaded
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*/
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protected function includeFile(string $file)
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{
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$file = $this->sanitizeFilename($file);
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if (is_file($file)) {
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include_once $file;
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return $file;
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}
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return false;
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}
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/**
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* Sanitizes a filename, replacing spaces with dashes.
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*
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* Removes special characters that are illegal in filenames on certain
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* operating systems and special characters requiring special escaping
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* to manipulate at the command line. Replaces spaces and consecutive
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* dashes with a single dash. Trim period, dash and underscore from beginning
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* and end of filename.
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*
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* @return string The sanitized filename
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*/
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public function sanitizeFilename(string $filename): string
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{
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// Only allow characters deemed safe for POSIX portable filenames.
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// Plus the forward slash for directory separators since this might be a path.
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// http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap03.html#tag_03_278
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// Modified to allow backslash and colons for on Windows machines.
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$filename = preg_replace('/[^0-9\p{L}\s\/\-\_\.\:\\\\]/u', '', $filename);
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// Clean up our filename edges.
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return trim($filename, '.-_');
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}
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/**
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* Locates autoload information from Composer, if available.
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*/
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protected function discoverComposerNamespaces()
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{
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if (! is_file(COMPOSER_PATH)) {
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return;
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}
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/**
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* @var ClassLoader $composer
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*/
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$composer = include COMPOSER_PATH;
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$paths = $composer->getPrefixesPsr4();
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$classes = $composer->getClassMap();
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unset($composer);
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// Get rid of CodeIgniter so we don't have duplicates
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if (isset($paths['CodeIgniter\\'])) {
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unset($paths['CodeIgniter\\']);
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}
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$newPaths = [];
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foreach ($paths as $key => $value) {
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// Composer stores namespaces with trailing slash. We don't.
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$newPaths[rtrim($key, '\\ ')] = $value;
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}
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$this->prefixes = array_merge($this->prefixes, $newPaths);
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$this->classmap = array_merge($this->classmap, $classes);
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}
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}
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