legacy.php
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<?php
/**
* Copyright (c) 2012 Robin Appelman <icewind@owncloud.com>
* This file is licensed under the Affero General Public License version 3 or
* later.
* See the COPYING-README file.
*/
namespace OC\Files\Cache;
/**
* Provide read only support for the old filecache
*/
class Legacy {
private $user;
private $cacheHasItems = null;
public function __construct($user) {
$this->user = $user;
}
/**
* get the numbers of items in the legacy cache
*
* @return int
*/
function getCount() {
$sql = 'SELECT COUNT(`id`) AS `count` FROM `*PREFIX*fscache` WHERE `user` = ?';
$result = \OC_DB::executeAudited($sql, array($this->user));
if ($row = $result->fetchRow()) {
return $row['count'];
} else {
return 0;
}
}
/**
* check if a legacy cache is present and holds items
*
* @return bool
*/
function hasItems() {
if (!is_null($this->cacheHasItems)) {
return $this->cacheHasItems;
}
try {
$query = \OC_DB::prepare('SELECT `id` FROM `*PREFIX*fscache` WHERE `user` = ?',1);
} catch (\Exception $e) {
$this->cacheHasItems = false;
return false;
}
try {
$result = $query->execute(array($this->user));
} catch (\Exception $e) {
$this->cacheHasItems = false;
return false;
}
if ($result === false || property_exists($result, 'error_message_prefix')) {
$this->cacheHasItems = false;
return false;
}
$this->cacheHasItems = (bool)$result->fetchRow();
return $this->cacheHasItems;
}
/**
* get an item from the legacy cache
*
* @param string|int $path
* @return array
*/
function get($path) {
if (is_numeric($path)) {
$sql = 'SELECT * FROM `*PREFIX*fscache` WHERE `id` = ?';
} else {
$sql = 'SELECT * FROM `*PREFIX*fscache` WHERE `path` = ?';
}
$result = \OC_DB::executeAudited($sql, array($path));
$data = $result->fetchRow();
$data['etag'] = $this->getEtag($data['path'], $data['user']);
return $data;
}
/**
* Get the ETag for the given path
*
* @param type $path
* @return string
*/
function getEtag($path, $user = null) {
static $query = null;
$pathDetails = explode('/', $path, 4);
if((!$user) && !isset($pathDetails[1])) {
//no user!? Too odd, return empty string.
return '';
} else if(!$user) {
//guess user from path, if no user passed.
$user = $pathDetails[1];
}
if(!isset($pathDetails[3]) || is_null($pathDetails[3])) {
$relativePath = '';
} else {
$relativePath = $pathDetails[3];
}
if(is_null($query)){
$query = \OC_DB::prepare('SELECT `propertyvalue` FROM `*PREFIX*properties` WHERE `userid` = ? AND `propertypath` = ? AND `propertyname` = \'{DAV:}getetag\'');
}
$result = \OC_DB::executeAudited($query,array($user, '/' . $relativePath));
if ($row = $result->fetchRow()) {
return trim($row['propertyvalue'], '"');
} else {
return '';
}
}
/**
* get all child items of an item from the legacy cache
*
* @param int $id
* @return array
*/
function getChildren($id) {
$result = \OC_DB::executeAudited('SELECT * FROM `*PREFIX*fscache` WHERE `parent` = ?', array($id));
$data = $result->fetchAll();
foreach ($data as $i => $item) {
$data[$i]['etag'] = $this->getEtag($item['path'], $item['user']);
}
return $data;
}
}