146 lines
4.3 KiB
PHP
146 lines
4.3 KiB
PHP
<?php
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/**
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* ownCloud
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*
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* @author Jakob Sack
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* @copyright 2011 Jakob Sack kde@jakobsack.de
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
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*
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* You should have received a copy of the GNU Affero General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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class OC_Connector_Sabre_Locks extends Sabre_DAV_Locks_Backend_Abstract {
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/**
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* Returns a list of Sabre_DAV_Locks_LockInfo objects
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*
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* This method should return all the locks for a particular uri, including
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* locks that might be set on a parent uri.
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*
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* If returnChildLocks is set to true, this method should also look for
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* any locks in the subtree of the uri for locks.
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*
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* @param string $uri
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* @param bool $returnChildLocks
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* @return array
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*/
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public function getLocks($uri, $returnChildLocks) {
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// NOTE: the following 10 lines or so could be easily replaced by
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// pure sql. MySQL's non-standard string concatination prevents us
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// from doing this though.
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// NOTE: SQLite requires time() to be inserted directly. That's ugly
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// but otherwise reading locks from SQLite Databases will return
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// nothing
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$query = 'SELECT * FROM `*PREFIX*locks` WHERE `userid` = ? AND (`created` + `timeout`) > '.time().' AND (( `uri` = ?)';
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$params = array(OC_User::getUser(), $uri);
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// We need to check locks for every part in the uri.
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$uriParts = explode('/', $uri);
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// We already covered the last part of the uri
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array_pop($uriParts);
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$currentPath='';
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foreach($uriParts as $part) {
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if ($currentPath) $currentPath.='/';
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$currentPath.=$part;
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$query.=' OR (`depth` != 0 AND `uri` = ?)';
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$params[] = $currentPath;
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}
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if ($returnChildLocks) {
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$query.=' OR (`uri` LIKE ?)';
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$params[] = $uri . '/%';
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}
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$query.=')';
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$stmt = OC_DB::prepare( $query );
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$result = $stmt->execute( $params );
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$lockList = array();
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while( $row = $result->fetchRow()) {
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$lockInfo = new Sabre_DAV_Locks_LockInfo();
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$lockInfo->owner = $row['owner'];
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$lockInfo->token = $row['token'];
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$lockInfo->timeout = $row['timeout'];
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$lockInfo->created = $row['created'];
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$lockInfo->scope = $row['scope'];
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$lockInfo->depth = $row['depth'];
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$lockInfo->uri = $row['uri'];
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$lockList[] = $lockInfo;
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}
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return $lockList;
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}
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/**
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* Locks a uri
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*
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* @param string $uri
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* @param Sabre_DAV_Locks_LockInfo $lockInfo
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* @return bool
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*/
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public function lock($uri, Sabre_DAV_Locks_LockInfo $lockInfo) {
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// We're making the lock timeout 5 minutes
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$lockInfo->timeout = 300;
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$lockInfo->created = time();
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$lockInfo->uri = $uri;
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$locks = $this->getLocks($uri, false);
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$exists = false;
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foreach($locks as $lock) {
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if ($lock->token == $lockInfo->token) $exists = true;
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}
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if ($exists) {
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$query = OC_DB::prepare( 'UPDATE `*PREFIX*locks` SET `owner` = ?, `timeout` = ?, `scope` = ?, `depth` = ?, `uri` = ?, `created` = ? WHERE `userid` = ? AND `token` = ?' );
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$result = $query->execute( array($lockInfo->owner,$lockInfo->timeout,$lockInfo->scope,$lockInfo->depth,$uri,$lockInfo->created,OC_User::getUser(),$lockInfo->token));
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} else {
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$query = OC_DB::prepare( 'INSERT INTO `*PREFIX*locks` (`userid`,`owner`,`timeout`,`scope`,`depth`,`uri`,`created`,`token`) VALUES (?,?,?,?,?,?,?,?)' );
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$result = $query->execute( array(OC_User::getUser(),$lockInfo->owner,$lockInfo->timeout,$lockInfo->scope,$lockInfo->depth,$uri,$lockInfo->created,$lockInfo->token));
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}
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return true;
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}
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/**
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* Removes a lock from a uri
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*
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* @param string $uri
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* @param Sabre_DAV_Locks_LockInfo $lockInfo
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* @return bool
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*/
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public function unlock($uri, Sabre_DAV_Locks_LockInfo $lockInfo) {
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$query = OC_DB::prepare( 'DELETE FROM `*PREFIX*locks` WHERE `userid` = ? AND `uri` = ? AND `token` = ?' );
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$result = $query->execute( array(OC_User::getUser(), $uri, $lockInfo->token));
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return $result->numRows() === 1;
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}
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}
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