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<?php
declare(strict_types=1);
/**
* SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
* SPDX-FileCopyrightText: 2013-2016 ownCloud, Inc.
* SPDX-License-Identifier: AGPL-3.0-only
*/
namespace OC;
use OCP\App\AppPathNotFoundException;
use OCP\App\IAppManager;
use OCP\AutoloadNotAllowedException;
use OCP\ICache;
use Psr\Log\LoggerInterface;
class Autoloader {
/** @var bool */
private $useGlobalClassPath = true;
/** @var array */
private $validRoots = [];
/**
* Optional low-latency memory cache for class to path mapping.
*
* @var \OC\Memcache\Cache
*/
protected $memoryCache;
/**
* Autoloader constructor.
*
* @param string[] $validRoots
*/
public function __construct(array $validRoots) {
foreach ($validRoots as $root) {
$this->validRoots[$root] = true;
}
}
/**
* Add a path to the list of valid php roots for auto loading
*
* @param string $root
*/
public function addValidRoot(string $root): void {
$root = stream_resolve_include_path($root);
$this->validRoots[$root] = true;
}
/**
* disable the usage of the global classpath \OC::$CLASSPATH
*/
public function disableGlobalClassPath(): void {
$this->useGlobalClassPath = false;
}
/**
* enable the usage of the global classpath \OC::$CLASSPATH
*/
public function enableGlobalClassPath(): void {
$this->useGlobalClassPath = true;
}
/**
* get the possible paths for a class
*
* @param string $class
* @return array an array of possible paths
*/
public function findClass(string $class): array {
$class = trim($class, '\\');
$paths = [];
if ($this->useGlobalClassPath && array_key_exists($class, \OC::$CLASSPATH)) {
$paths[] = \OC::$CLASSPATH[$class];
/**
* @TODO: Remove this when necessary
* Remove "apps/" from inclusion path for smooth migration to multi app dir
*/
if (strpos(\OC::$CLASSPATH[$class], 'apps/') === 0) {
\OCP\Server::get(LoggerInterface::class)->debug('include path for class "' . $class . '" starts with "apps/"', ['app' => 'core']);
$paths[] = str_replace('apps/', '', \OC::$CLASSPATH[$class]);
}
} elseif (strpos($class, 'OC_') === 0) {
$paths[] = \OC::$SERVERROOT . '/lib/private/legacy/' . strtolower(str_replace('_', '/', substr($class, 3)) . '.php');
} elseif (strpos($class, 'OCA\\') === 0) {
[, $app, $rest] = explode('\\', $class, 3);
$app = strtolower($app);
try {
$appPath = \OCP\Server::get(IAppManager::class)->getAppPath($app);
if (stream_resolve_include_path($appPath)) {
$paths[] = $appPath . '/' . strtolower(str_replace('\\', '/', $rest) . '.php');
// If not found in the root of the app directory, insert '/lib' after app id and try again.
$paths[] = $appPath . '/lib/' . strtolower(str_replace('\\', '/', $rest) . '.php');
}
} catch (AppPathNotFoundException) {
// App not found, ignore
}
} elseif ($class === 'Test\\TestCase') {
// This File is considered public API, so we make sure that the class
// can still be loaded, although the PSR-4 paths have not been loaded.
$paths[] = \OC::$SERVERROOT . '/tests/lib/TestCase.php';
}
return $paths;
}
/**
* @param string $fullPath
* @return bool
* @throws AutoloadNotAllowedException
*/
protected function isValidPath(string $fullPath): bool {
foreach ($this->validRoots as $root => $true) {
if (substr($fullPath, 0, strlen($root) + 1) === $root . '/') {
return true;
}
}
throw new AutoloadNotAllowedException($fullPath);
}
/**
* Load the specified class
*
* @param string $class
* @return bool
* @throws AutoloadNotAllowedException
*/
public function load(string $class): bool {
$pathsToRequire = null;
if ($this->memoryCache) {
$pathsToRequire = $this->memoryCache->get($class);
}
if (class_exists($class, false)) {
return false;
}
if (!is_array($pathsToRequire)) {
// No cache or cache miss
$pathsToRequire = [];
foreach ($this->findClass($class) as $path) {
$fullPath = stream_resolve_include_path($path);
if ($fullPath && $this->isValidPath($fullPath)) {
$pathsToRequire[] = $fullPath;
}
}
if ($this->memoryCache) {
$this->memoryCache->set($class, $pathsToRequire, 60); // cache 60 sec
}
}
foreach ($pathsToRequire as $fullPath) {
require_once $fullPath;
}
return false;
}
/**
* Sets the optional low-latency cache for class to path mapping.
*
* @param ICache $memoryCache Instance of memory cache.
*/
public function setMemoryCache(?ICache $memoryCache = null): void {
$this->memoryCache = $memoryCache;
}
}
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