155 lines
4.2 KiB
PHP
155 lines
4.2 KiB
PHP
<?php
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require_once("lib/base.php");
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/**
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* The Lock manager allows you to handle all file-locks centrally.
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*
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* This Lock Manager stores all its data in a database. You must pass a PDO
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* connection object in the constructor.
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*
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* @package Sabre
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* @subpackage DAV
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* @copyright Copyright (C) 2007-2011 Rooftop Solutions. All rights reserved.
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* @author Evert Pot (http://www.rooftopsolutions.nl/)
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* @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
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*/
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/*
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*
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* The following SQL statement is just a help for developers and will not be
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* executed!
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*
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* CREATE TABLE locks (
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* `id` INTEGER UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
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* `userid` VARCHAR(200),
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* `owner` VARCHAR(100),
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* `timeout` INTEGER UNSIGNED,
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* `created` INTEGER,
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* `token` VARCHAR(100),
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* `scope` TINYINT,
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* `depth` TINYINT,
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* `uri` text
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* );
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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, $returnChildLocks) {
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// NOTE: the following 10 lines or so could be easily replaced by
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// pure sql. MySQL's non-standard string concatination prevents us
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// from doing this though.
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$query = 'SELECT * FROM *PREFIX*locks WHERE userid = ? AND (created + timeout) > ? AND ((uri = ?)';
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$params = array(OC_USER::getUser(),time(),$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 $k=>$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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