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<?php
/**
* @author Robin Appelman <icewind@owncloud.com>
*
* @copyright Copyright (c) 2015, ownCloud, Inc.
* @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\Files\Cache;
/**
* Propagates changes in etag and mtime up the filesystem tree
*
* @package OC\Files\Cache
*/
class ChangePropagator {
/**
* @var string[]
*/
protected $changedFiles = array();
/**
* @var \OC\Files\View
*/
protected $view;
/**
* @param \OC\Files\View $view
*/
public function __construct(\OC\Files\View $view) {
$this->view = $view;
}
public function addChange($path) {
$this->changedFiles[] = $path;
}
public function getChanges() {
return $this->changedFiles;
}
/**
* propagate the registered changes to their parent folders
*
* @param int $time (optional) the mtime to set for the folders, if not set the current time is used
*/
public function propagateChanges($time = null) {
$parents = $this->getAllParents();
$this->changedFiles = array();
if (!$time) {
$time = time();
}
foreach ($parents as $parent) {
/**
* @var \OC\Files\Storage\Storage $storage
* @var string $internalPath
*/
list($storage, $internalPath) = $this->view->resolvePath($parent);
if ($storage) {
$cache = $storage->getCache();
$entry = $cache->get($internalPath);
$cache->update($entry['fileid'], array('mtime' => max($time, $entry['mtime']), 'etag' => $storage->getETag($internalPath)));
}
}
}
/**
* @return string[]
*/
public function getAllParents() {
$parents = array();
foreach ($this->getChanges() as $path) {
$parents = array_values(array_unique(array_merge($parents, $this->getParents($path))));
}
return $parents;
}
/**
* get all parent folders of $path
*
* @param string $path
* @return string[]
*/
protected function getParents($path) {
$parts = explode('/', $path);
// remove the singe file
array_pop($parts);
$result = array('/');
$resultPath = '';
foreach ($parts as $part) {
if ($part) {
$resultPath .= '/' . $part;
$result[] = $resultPath;
}
}
return $result;
}
}
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