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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Bart Visscher <bartv@thisnet.nl>
* @author Björn Schießle <bjoern@schiessle.org>
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
* @author John Molakvoæ <skjnldsv@protonmail.com>
* @author Jörn Friedrich Dreyer <jfd@butonic.de>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Robin Appelman <robin@icewind.nl>
* @author Robin McCorkell <robin@mccorkell.me.uk>
* @author Sam Tuke <mail@samtuke.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 OCA\Files_Versions;
use OC\Files\Filesystem;
use OC\Files\Mount\MoveableMount;
use OC\Files\View;
use OCA\Files_Versions\Db\VersionEntity;
use OCA\Files_Versions\Db\VersionsMapper;
use OCP\EventDispatcher\Event;
use OCP\EventDispatcher\IEventListener;
use OCP\Files\Events\Node\BeforeNodeCopiedEvent;
use OCP\Files\Events\Node\BeforeNodeDeletedEvent;
use OCP\Files\Events\Node\BeforeNodeRenamedEvent;
use OCP\Files\Events\Node\BeforeNodeWrittenEvent;
use OCP\Files\Events\Node\NodeCopiedEvent;
use OCP\Files\Events\Node\NodeDeletedEvent;
use OCP\Files\Events\Node\NodeRenamedEvent;
use OCP\Files\Events\Node\NodeWrittenEvent;
use OCP\Files\Folder;
use OCP\Files\IMimeTypeLoader;
use OCP\Files\Node;
class Hooks implements IEventListener {
private Folder $userFolder;
private VersionsMapper $versionsMapper;
/**
* @var array<int, bool>
*/
private array $versionsCreated = [];
private IMimeTypeLoader $mimeTypeLoader;
public function __construct(
Folder $userFolder,
VersionsMapper $versionsMapper,
IMimeTypeLoader $mimeTypeLoader
) {
$this->userFolder = $userFolder;
$this->versionsMapper = $versionsMapper;
$this->mimeTypeLoader = $mimeTypeLoader;
}
public function handle(Event $event): void {
if ($event instanceof BeforeNodeWrittenEvent) {
$this->write_hook($event->getNode());
}
if ($event instanceof NodeWrittenEvent) {
$this->post_write_hook($event->getNode());
}
if ($event instanceof BeforeNodeDeletedEvent) {
$this->pre_remove_hook($event->getNode());
}
if ($event instanceof NodeDeletedEvent) {
$this->remove_hook($event->getNode());
}
if ($event instanceof NodeRenamedEvent) {
$this->rename_hook($event->getSource(), $event->getTarget());
}
if ($event instanceof NodeCopiedEvent) {
$this->copy_hook($event->getSource(), $event->getTarget());
}
if ($event instanceof BeforeNodeRenamedEvent) {
$this->pre_renameOrCopy_hook($event->getSource(), $event->getTarget());
}
if ($event instanceof BeforeNodeCopiedEvent) {
$this->pre_renameOrCopy_hook($event->getSource(), $event->getTarget());
}
}
/**
* listen to write event.
*/
public function write_hook(Node $node): void {
$path = $this->userFolder->getRelativePath($node->getPath());
$result = Storage::store($path);
if ($result === false) {
return;
}
// Store the result of the version creation so it can be used in post_write_hook.
$this->versionsCreated[$node->getId()] = true;
}
/**
* listen to post_write event.
*/
public function post_write_hook(Node $node): void {
if (!array_key_exists($node->getId(), $this->versionsCreated)) {
return;
}
unset($this->versionsCreated[$node->getId()]);
$versionEntity = new VersionEntity();
$versionEntity->setFileId($node->getId());
$versionEntity->setTimestamp($node->getMTime());
$versionEntity->setSize($node->getSize());
$versionEntity->setMimetype($this->mimeTypeLoader->getId($node->getMimetype()));
$versionEntity->setMetadata([]);
$this->versionsMapper->insert($versionEntity);
}
/**
* Erase versions of deleted file
*
* This function is connected to the delete signal of OC_Filesystem
* cleanup the versions directory if the actual file gets deleted
*/
public function remove_hook(Node $node): void {
$path = $this->userFolder->getRelativePath($node->getPath());
Storage::delete($path);
}
/**
* mark file as "deleted" so that we can clean up the versions if the file is gone
*/
public function pre_remove_hook(Node $node): void {
$path = $this->userFolder->getRelativePath($node->getPath());
Storage::markDeletedFile($path);
}
/**
* rename/move versions of renamed/moved files
*
* This function is connected to the rename signal of OC_Filesystem and adjust the name and location
* of the stored versions along the actual file
*/
public function rename_hook(Node $source, Node $target): void {
$oldPath = $this->userFolder->getRelativePath($source->getPath());
$newPath = $this->userFolder->getRelativePath($target->getPath());
Storage::renameOrCopy($oldPath, $newPath, 'rename');
}
/**
* copy versions of copied files
*
* This function is connected to the copy signal of OC_Filesystem and copies the
* the stored versions to the new location
*/
public function copy_hook(Node $source, Node $target): void {
$oldPath = $this->userFolder->getRelativePath($source->getPath());
$newPath = $this->userFolder->getRelativePath($target->getPath());
Storage::renameOrCopy($oldPath, $newPath, 'copy');
}
/**
* Remember owner and the owner path of the source file.
* If the file already exists, then it was a upload of a existing file
* over the web interface and we call Storage::store() directly
*
*
*/
public function pre_renameOrCopy_hook(Node $source, Node $target): void {
// if we rename a movable mount point, then the versions don't have
// to be renamed
$oldPath = $this->userFolder->getRelativePath($source->getPath());
$newPath = $this->userFolder->getRelativePath($target->getPath());
$absOldPath = Filesystem::normalizePath('/' . \OC_User::getUser() . '/files' . $oldPath);
$manager = Filesystem::getMountManager();
$mount = $manager->find($absOldPath);
$internalPath = $mount->getInternalPath($absOldPath);
if ($internalPath === '' and $mount instanceof MoveableMount) {
return;
}
$view = new View(\OC_User::getUser() . '/files');
if ($view->file_exists($newPath)) {
Storage::store($newPath);
} else {
Storage::setSourcePathAndUser($oldPath);
}
}
}
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