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<?php
/**
* @package Joomla.Platform
* @subpackage Cache
*
* @copyright Copyright (C) 2005 - 2015 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
defined('JPATH_PLATFORM') or die;
/**
* Cache lite storage handler
*
* @see http://pear.php.net/package/Cache_Lite/
* @since 11.1
*/
class JCacheStorageCachelite extends JCacheStorage
{
/**
* Static cache of the Cache_Lite instance
*
* @var object
* @since 11.1
*/
protected static $CacheLiteInstance = null;
/**
* Root path
*
* @var string
* @since 11.1
*/
protected $_root;
/**
* Constructor
*
* @param array $options Optional parameters.
*
* @since 11.1
*/
public function __construct($options = array())
{
parent::__construct($options);
$this->_root = $options['cachebase'];
$cloptions = array(
'cacheDir' => $this->_root . '/',
'lifeTime' => $this->_lifetime,
'fileLocking' => $this->_locking,
'automaticCleaningFactor' => isset($options['autoclean']) ? $options['autoclean'] : 200,
'fileNameProtection' => false,
'hashedDirectoryLevel' => 0,
'caching' => $options['caching']);
if (self::$CacheLiteInstance === null)
{
$this->initCache($cloptions);
}
}
/**
* Instantiates the appropriate CacheLite object.
* Only initializes the engine if it does not already exist.
* Note this is a protected method
*
* @param array $cloptions optional parameters
*
* @return object
*
* @since 11.1
*/
protected function initCache($cloptions)
{
if (!class_exists('Cache_Lite'))
{
require_once 'Cache/Lite.php';
}
self::$CacheLiteInstance = new Cache_Lite($cloptions);
return self::$CacheLiteInstance;
}
/**
* Get cached data from a file by id and group
*
* @param string $id The cache data id.
* @param string $group The cache data group.
* @param boolean $checkTime True to verify cache time expiration threshold.
*
* @return mixed Boolean false on failure or a cached data string.
*
* @since 11.1
*/
public function get($id, $group, $checkTime = true)
{
self::$CacheLiteInstance->setOption('cacheDir', $this->_root . '/' . $group . '/');
$this->_getCacheId($id, $group);
$data = self::$CacheLiteInstance->get($this->rawname, $group);
return $data;
}
/**
* Get all cached data
*
* @return array
*
* @since 11.1
*/
public function getAll()
{
parent::getAll();
$path = $this->_root;
$folders = new DirectoryIterator($path);
$data = array();
foreach ($folders as $folder)
{
if (!$folder->isDir() || $folder->isDot())
{
continue;
}
$foldername = $folder->getFilename();
$files = new DirectoryIterator($path . '/' . $foldername);
$item = new JCacheStorageHelper($foldername);
foreach ($files as $file)
{
if (!$file->isFile())
{
continue;
}
$filename = $file->getFilename();
$item->updateSize(filesize($path . '/' . $foldername . '/' . $filename) / 1024);
}
$data[$foldername] = $item;
}
return $data;
}
/**
* Store the data to a file by id and group
*
* @param string $id The cache data id.
* @param string $group The cache data group.
* @param string $data The data to store in cache.
*
* @return boolean True on success, false otherwise
*
* @since 11.1
*/
public function store($id, $group, $data)
{
$dir = $this->_root . '/' . $group;
// If the folder doesn't exist try to create it
if (!is_dir($dir))
{
// Make sure the index file is there
$indexFile = $dir . '/index.html';
@mkdir($dir) && file_put_contents($indexFile, '<!DOCTYPE html><title></title>');
}
// Make sure the folder exists
if (!is_dir($dir))
{
return false;
}
self::$CacheLiteInstance->setOption('cacheDir', $this->_root . '/' . $group . '/');
$this->_getCacheId($id, $group);
$success = self::$CacheLiteInstance->save($data, $this->rawname, $group);
if ($success == true)
{
return $success;
}
else
{
return false;
}
}
/**
* Remove a cached data file by id and group
*
* @param string $id The cache data id
* @param string $group The cache data group
*
* @return boolean True on success, false otherwise
*
* @since 11.1
*/
public function remove($id, $group)
{
self::$CacheLiteInstance->setOption('cacheDir', $this->_root . '/' . $group . '/');
$this->_getCacheId($id, $group);
$success = self::$CacheLiteInstance->remove($this->rawname, $group);
if ($success == true)
{
return $success;
}
else
{
return false;
}
}
/**
* Clean cache for a group given a mode.
*
* @param string $group The cache data group.
* @param string $mode The mode for cleaning cache [group|notgroup].
* group mode : cleans all cache in the group
* notgroup mode : cleans all cache not in the group
*
* @return boolean True on success, false otherwise.
*
* @since 11.1
*/
public function clean($group, $mode = null)
{
jimport('joomla.filesystem.folder');
switch ($mode)
{
case 'notgroup':
$clmode = 'notingroup';
$success = self::$CacheLiteInstance->clean($group, $clmode);
break;
case 'group':
if (is_dir($this->_root . '/' . $group))
{
$clmode = $group;
self::$CacheLiteInstance->setOption('cacheDir', $this->_root . '/' . $group . '/');
$success = self::$CacheLiteInstance->clean($group, $clmode);
JFolder::delete($this->_root . '/' . $group);
}
else
{
$success = true;
}
break;
default:
if (is_dir($this->_root . '/' . $group))
{
$clmode = $group;
self::$CacheLiteInstance->setOption('cacheDir', $this->_root . '/' . $group . '/');
$success = self::$CacheLiteInstance->clean($group, $clmode);
}
else
{
$success = true;
}
break;
}
if ($success == true)
{
return $success;
}
else
{
return false;
}
}
/**
* Garbage collect expired cache data
*
* @return boolean True on success, false otherwise.
*
* @since 11.1
*/
public function gc()
{
$result = true;
self::$CacheLiteInstance->setOption('automaticCleaningFactor', 1);
self::$CacheLiteInstance->setOption('hashedDirectoryLevel', 1);
$success1 = self::$CacheLiteInstance->_cleanDir($this->_root . '/', false, 'old');
if (!($dh = opendir($this->_root . '/')))
{
return false;
}
while ($file = readdir($dh))
{
if (($file != '.') && ($file != '..') && ($file != '.svn'))
{
$file2 = $this->_root . '/' . $file;
if (is_dir($file2))
{
$result = ($result && (self::$CacheLiteInstance->_cleanDir($file2 . '/', false, 'old')));
}
}
}
$success = ($success1 && $result);
return $success;
}
/**
* Test to see if the cache storage is available.
*
* @return boolean True on success, false otherwise.
*
* @since 12.1
*/
public static function isSupported()
{
@include_once 'Cache/Lite.php';
return class_exists('Cache_Lite');
}
}
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