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<?php
/**
* @copyright Copyright (c) 2016, Roeland Jago Douma <roeland@famdouma.nl>
*
* @author Roeland Jago Douma <roeland@famdouma.nl>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* 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
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OC\Preview;
use OCP\Files\File;
use OCP\Files\Node;
use OCP\Files\Folder;
use OCP\Files\IAppData;
use OCP\Files\NotFoundException;
/**
* Class Watcher
*
* @package OC\Preview
*
* Class that will watch filesystem activity and remove previews as needed.
*/
class Watcher {
/** @var IAppData */
private $appData;
/** @var int[] */
private $toDelete = [];
/**
* Watcher constructor.
*
* @param IAppData $appData
*/
public function __construct(IAppData $appData) {
$this->appData = $appData;
}
public function postWrite(Node $node) {
// We only handle files
if ($node instanceof Folder) {
return;
}
try {
$folder = $this->appData->getFolder($node->getId());
$folder->delete();
} catch (NotFoundException $e) {
//Nothing to do
}
}
public function preDelete(Node $node) {
// To avoid cycles
if ($this->toDelete !== []) {
return;
}
if ($node instanceof File) {
$this->toDelete[] = $node->getId();
return;
}
/** @var Folder $node */
$this->deleteFolder($node);
}
private function deleteFolder(Folder $folder) {
$nodes = $folder->getDirectoryListing();
foreach ($nodes as $node) {
if ($node instanceof File) {
$this->toDelete[] = $node->getId();
} else if ($node instanceof Folder) {
$this->deleteFolder($node);
}
}
}
public function postDelete(Node $node) {
foreach ($this->toDelete as $fid) {
try {
$folder = $this->appData->getFolder($fid);
$folder->delete();
} catch (NotFoundException $e) {
// continue
}
}
}
}
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