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<?php
/**
* @author Bart Visscher <bartv@thisnet.nl>
* @author Robin Appelman <icewind@owncloud.com>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Thomas Tanghus <thomas@tanghus.net>
*
* @copyright Copyright (c) 2015, ownCloud, Inc.
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program 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, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OC;
class Cache {
/**
* @var Cache $user_cache
*/
static protected $user_cache;
/**
* @var Cache $global_cache
*/
static protected $global_cache;
/**
* get the global cache
* @return Cache
*/
static public function getGlobalCache() {
if (!self::$global_cache) {
self::$global_cache = new Cache\FileGlobal();
}
return self::$global_cache;
}
/**
* get the user cache
* @return Cache
*/
static public function getUserCache() {
if (!self::$user_cache) {
self::$user_cache = new Cache\File();
}
return self::$user_cache;
}
/**
* get a value from the user cache
* @param string $key
* @return mixed
*/
static public function get($key) {
$user_cache = self::getUserCache();
return $user_cache->get($key);
}
/**
* set a value in the user cache
* @param string $key
* @param mixed $value
* @param int $ttl
* @return bool
*/
static public function set($key, $value, $ttl=0) {
if (empty($key)) {
return false;
}
$user_cache = self::getUserCache();
return $user_cache->set($key, $value, $ttl);
}
/**
* check if a value is set in the user cache
* @param string $key
* @return bool
*/
static public function hasKey($key) {
$user_cache = self::getUserCache();
return $user_cache->hasKey($key);
}
/**
* remove an item from the user cache
* @param string $key
* @return bool
*/
static public function remove($key) {
$user_cache = self::getUserCache();
return $user_cache->remove($key);
}
/**
* clear the user cache of all entries starting with a prefix
* @param string $prefix (optional)
* @return bool
*/
static public function clear($prefix='') {
$user_cache = self::getUserCache();
return $user_cache->clear($prefix);
}
/**
* creates cache key based on the files given
* @param string[] $files
* @return string
*/
static public function generateCacheKeyFromFiles($files) {
$key = '';
sort($files);
foreach($files as $file) {
$stat = stat($file);
$key .= $file.$stat['mtime'].$stat['size'];
}
return md5($key);
}
}
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