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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();
-
- /**
- * @brief walk up the users file tree and update the etags
- * @param string $user
- * @param string $path
- */
- static private function correctUsersFolder($user, $path) {
- // $path points to the mount point which is a virtual folder, so we start with
- // the parent
- $path = '/files' . dirname($path);
- \OC\Files\Filesystem::initMountPoints($user);
- $view = new \OC\Files\View('/' . $user);
- if ($view->file_exists($path)) {
- while ($path !== dirname($path)) {
- $etag = $view->getETag($path);
- $view->putFileInfo($path, array('etag' => $etag));
- $path = dirname($path);
- }
- } else {
- \OCP\Util::writeLog('files_sharing', 'can not update etags on ' . $path . ' for user ' . $user . '. Path does not exists', \OCP\Util::DEBUG);
- }
- }
-
- /**
- * Correct the parent folders' ETags for all users shared the file at $target
- *
- * @param string $target
- */
- static public function correctFolders($target) {
-
- // ignore part files
- if (pathinfo($target, PATHINFO_EXTENSION) === 'part') {
- return false;
- }
-
- // Correct Shared folders of other users shared with
- $shares = \OCA\Files_Sharing\Helper::getSharesFromItem($target);
-
- foreach ($shares as $share) {
- if ((int)$share['share_type'] === \OCP\Share::SHARE_TYPE_USER) {
- self::correctUsersFolder($share['share_with'], $share['file_target']);
- } elseif ((int)$share['share_type'] === \OCP\Share::SHARE_TYPE_GROUP) {
- $users = \OC_Group::usersInGroup($share['share_with']);
- foreach ($users as $user) {
- self::correctUsersFolder($user, $share['file_target']);
- }
- } else { //unique name for group share
- self::correctUsersFolder($share['share_with'], $share['file_target']);
- }
- }
- }
-
- /**
- * @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']);
- }
-
- /**
- * clean up oc_share table from files which are no longer exists
- *
- * This fixes issues from updates from files_sharing < 0.3.5.6 (ownCloud 4.5)
- * It will just be called during the update of the app
- */
- static public function fixBrokenSharesOnAppUpdate() {
- // delete all shares where the original file no longer exists
- $findAndRemoveShares = \OC_DB::prepare('DELETE FROM `*PREFIX*share` ' .
- 'WHERE `file_source` NOT IN ( ' .
- 'SELECT `fileid` FROM `*PREFIX*filecache` WHERE `item_type` IN (\'file\', \'folder\'))'
- );
- $findAndRemoveShares->execute(array());
- }
-
- }
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