updater.php
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<?php
/**
* ownCloud
*
* @author Michael Gapczynski
* @copyright 2013 Michael Gapczynski mtgap@owncloud.com
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library 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 library. If not, see <http://www.gnu.org/licenses/>.
*/
namespace OC\Files\Cache;
class Shared_Updater {
// shares which can be removed from oc_share after the delete operation was successful
static private $toRemove = array();
/**
* Correct the parent folders' ETags for all users shared the file at $target
*
* @param string $target
*/
static public function correctFolders($target) {
$uid = \OCP\User::getUser();
$uidOwner = \OC\Files\Filesystem::getOwner($target);
$info = \OC\Files\Filesystem::getFileInfo($target);
$checkedUser = array($uidOwner);
// Correct Shared folders of other users shared with
$users = \OCP\Share::getUsersItemShared('file', $info['fileid'], $uidOwner, true);
if (!empty($users)) {
while (!empty($users)) {
$reshareUsers = array();
foreach ($users as $user) {
if ( !in_array($user, $checkedUser) ) {
$etag = \OC\Files\Filesystem::getETag('');
\OCP\Config::setUserValue($user, 'files_sharing', 'etag', $etag);
// Look for reshares
$reshareUsers = array_merge($reshareUsers, \OCP\Share::getUsersItemShared('file', $info['fileid'], $user, true));
$checkedUser[] = $user;
}
}
$users = $reshareUsers;
}
}
}
/**
* @brief remove all shares for a given file if the file was deleted
*
* @param string $path
*/
private static function removeShare($path) {
$fileSource = self::$toRemove[$path];
if (!\OC\Files\Filesystem::file_exists($path)) {
$query = \OC_DB::prepare('DELETE FROM `*PREFIX*share` WHERE `file_source`=?');
try {
\OC_DB::executeAudited($query, array($fileSource));
} catch (\Exception $e) {
\OCP\Util::writeLog('files_sharing', "can't remove share: " . $e->getMessage(), \OCP\Util::WARN);
}
}
unset(self::$toRemove[$path]);
}
/**
* @param array $params
*/
static public function writeHook($params) {
self::correctFolders($params['path']);
}
/**
* @param array $params
*/
static public function renameHook($params) {
self::correctFolders($params['newpath']);
self::correctFolders(pathinfo($params['oldpath'], PATHINFO_DIRNAME));
}
/**
* @param array $params
*/
static public function deleteHook($params) {
self::correctFolders($params['path']);
$fileInfo = \OC\Files\Filesystem::getFileInfo($params['path']);
// mark file as deleted so that we can clean up the share table if
// the file was deleted successfully
self::$toRemove[$params['path']] = $fileInfo['fileid'];
}
/**
* @param array $params
*/
static public function postDeleteHook($params) {
self::removeShare($params['path']);
}
/**
* @param array $params
*/
static public function shareHook($params) {
if ($params['itemType'] === 'file' || $params['itemType'] === 'folder') {
if (isset($params['uidOwner'])) {
$uidOwner = $params['uidOwner'];
} else {
$uidOwner = \OCP\User::getUser();
}
$users = \OCP\Share::getUsersItemShared($params['itemType'], $params['fileSource'], $uidOwner, true, false);
if (!empty($users)) {
while (!empty($users)) {
$reshareUsers = array();
foreach ($users as $user) {
if ($user !== $uidOwner) {
$etag = \OC\Files\Filesystem::getETag('');
\OCP\Config::setUserValue($user, 'files_sharing', 'etag', $etag);
// Look for reshares
$reshareUsers = array_merge($reshareUsers, \OCP\Share::getUsersItemShared('file', $params['fileSource'], $user, true));
}
}
$users = $reshareUsers;
}
}
}
}
}