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<?php
declare(strict_types=1);
/**
* SPDX-FileCopyrightText: 2021 Nextcloud GmbH and Nextcloud contributors
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
namespace OC\Authentication\Listeners;
use OC\Files\Cache\Cache;
use OC\Files\Storage\Wrapper\Wrapper;
use OCP\EventDispatcher\Event;
use OCP\EventDispatcher\IEventListener;
use OCP\Files\Config\IMountProviderCollection;
use OCP\Files\Storage\IStorage;
use OCP\User\Events\BeforeUserDeletedEvent;
use OCP\User\Events\UserDeletedEvent;
use Psr\Log\LoggerInterface;
/** @template-implements IEventListener<BeforeUserDeletedEvent|UserDeletedEvent> */
class UserDeletedFilesCleanupListener implements IEventListener {
/** @var array<string,IStorage> */
private $homeStorageCache = [];
public function __construct(
private IMountProviderCollection $mountProviderCollection,
private LoggerInterface $logger,
) {
}
public function handle(Event $event): void {
$user = $event->getUser();
// since we can't reliably get the user home storage after the user is deleted
// but the user deletion might get canceled during the before event
// we only cache the user home storage during the before event and then do the
// action deletion during the after event
if ($event instanceof BeforeUserDeletedEvent) {
$this->logger->debug('Prepare deleting storage for user {userId}', ['userId' => $user->getUID()]);
$userHome = $this->mountProviderCollection->getHomeMountForUser($user);
$storage = $userHome->getStorage();
if (!$storage) {
throw new \Exception('Account has no home storage');
}
// remove all wrappers, so we do the delete directly on the home storage bypassing any wrapper
while ($storage->instanceOfStorage(Wrapper::class)) {
/** @var Wrapper $storage */
$storage = $storage->getWrapperStorage();
}
$this->homeStorageCache[$event->getUser()->getUID()] = $storage;
}
if ($event instanceof UserDeletedEvent) {
if (!isset($this->homeStorageCache[$user->getUID()])) {
throw new \Exception('UserDeletedEvent fired without matching BeforeUserDeletedEvent');
}
$storage = $this->homeStorageCache[$user->getUID()];
$cache = $storage->getCache();
$storage->rmdir('');
$this->logger->debug('Deleted storage for user {userId}', ['userId' => $user->getUID()]);
if ($cache instanceof Cache) {
$cache->clear();
} else {
throw new \Exception('Home storage has invalid cache');
}
}
}
}
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