session.class.php

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<?php
final class session {

        private static $cfg;

        private static $flash;

        private static $flashVars;

        private function __construct() {}

        public static function getInstance(array $cfg = array()) {
                self::initCfg();
                return factory::get('session_'.self::$cfg->use, $cfg);
        }

        private static function initCfg() {
                if (!self::$cfg)
                        self::$cfg = new config(factory::loadCfg(__CLASS__));
        }

        public static function initFlash() {
                if (self::$flash)
                        return;

                self::$flash = self::getInstance(array(
                        'prefix'=>'flash',
                        'nameSpace'=>'flash',
                ));

                self::$flashVars = self::$flash->getAll();
                self::$flash->clear();
        }

        public static function hasFlash($name) {
                self::initFlash();
                return array_key_exists($name, self::$flashVars);
        }

        public static function getFlash($name) {
                self::initFlash();
                return self::hasFlash($name)? self::$flashVars[$name] : null;
        }

        public static function setFlash($name, $val=null) {
                self::initFlash();
                if (is_array($name)) {
                        foreach($name as $k=>$v)
                                self::setFlash($k, $v);
                } else {
                        self::$flash->set(array(
                                'name'=>$name,
                                'val'=>$val
                        ));
                }
        }

}