/**
* Returns a singleton instance of the class
*
* Sets the cache name and checks that the cache directory is writeable
* @uses defined()
* @uses substr()
* @uses md5()
*
* @access public
* @return Memcache_Cache_Module
*/
public static function i()
{
if (!self::$_singleton instanceof Memcache_Cache_Module) {
if (Usu_Main::i()->getVar('page_modules', substr(Usu_Main::i()->getVar('filename'), 0, -4)) instanceof aPage_Modules) {
self::$cache_on = defined('USU5_CACHE_ON') && USU5_CACHE_ON == 'true' ? true : false;
self::$cache_name = self::$memcache_prefix . md5(HTTP_SERVER . Usu_Main::i()->getVar('page_modules', substr(Usu_Main::i()->getVar('filename'), 0, -4))->buildCacheName());
Usu_Main::i()->setVar('cache_name', self::$cache_name);
} else {
// No module so we set the cache name as the language id plus the called file
self::$cache_name = self::$memcache_prefix . md5(HTTP_SERVER . Usu_Main::i()->getVar('languages_id') . '_' . substr(Usu_Main::i()->getVar('filename'), 0, -4));
Usu_Main::i()->setVar('cache_name', self::$cache_name);
}
self::$_singleton = new self();
}
return self::$_singleton;
}
