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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Andreas Fischer <bantu@owncloud.com>
* @author Georg Ehrke <georg@owncloud.com>
* @author Joas Schilling <coding@schilljs.com>
* @author Lukas Reschke <lukas@statuscode.ch>
* @author Markus Goetz <markus@woboq.com>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Robin Appelman <icewind@owncloud.com>
* @author Robin McCorkell <robin@mccorkell.me.uk>
* @author Roeland Jago Douma <roeland@famdouma.nl>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Vincent Petry <pvince81@owncloud.com>
*
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OC;
use \OCP\AutoloadNotAllowedException;
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 $root
*/
public function addValidRoot($root) {
$root = stream_resolve_include_path($root);
$this->validRoots[$root] = true;
}
/**
* disable the usage of the global classpath \OC::$CLASSPATH
*/
public function disableGlobalClassPath() {
$this->useGlobalClassPath = false;
}
/**
* enable the usage of the global classpath \OC::$CLASSPATH
*/
public function enableGlobalClassPath() {
$this->useGlobalClassPath = true;
}
/**
* get the possible paths for a class
*
* @param string $class
* @return array|bool an array of possible paths or false if the class is not part of ownCloud
*/
public function findClass($class) {
$class = trim($class, '\\');
$paths = array();
if ($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\Util::writeLog('core', 'include path for class "' . $class . '" starts with "apps/"', \OCP\Util::DEBUG);
$paths[] = str_replace('apps/', '', \OC::$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) {
list(, $app, $rest) = explode('\\', $class, 3);
$app = strtolower($app);
$appPath = \OC_App::getAppPath($app);
if ($appPath && stream_resolve_include_path($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('\\', '/', $rest) . '.php');
}
} elseif ($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 $fullPath
* @return bool
*/
protected function isValidPath($fullPath) {
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 $class
* @return bool
*/
public function load($class) {
$pathsToRequire = null;
if ($this->memoryCache) {
$pathsToRequire = $this->memoryCache->get($class);
}
if(class_exists($class, false)) {
return false;
}
if (!is_array($pathsToRequire)) {
// No cache or cache miss
$pathsToRequire = array();
foreach ($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 \OC\Memcache\Cache $memoryCache Instance of memory cache.
*/
public function setMemoryCache(\OC\Memcache\Cache $memoryCache = null) {
$this->memoryCache = $memoryCache;
}
}
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