<?php

class Fck_Filemanager_Auth
{
    public static function check()
    {
        $authTypes = array('admin');
        if (Qs_Constant::get('FCK_FILEMANAGER_ON_USEREND_ENABLED')) {
            $authTypes[] = 'user';
        }
        foreach ($authTypes as $type) {
            if (self::_checkAuth4Type($type)) {
                return true;
            }
        }
        return false;
    }

    protected static function _checkAuth4Type($type)
    {
        $type = ucfirst($type);
        $authClassName = "App_{$type}_Auth";
        $authAdapterClassName = "App_{$type}_AuthAdapter";

        if (!class_exists($authClassName, true)) {
            return false;
        }

        /** @var $auth Qs_Auth */
        $auth = call_user_func($authClassName . '::getInstance');
        if ($auth && $auth->hasIdentity()) {
            $data = $auth->getIdentity();
            if (!class_exists($authAdapterClassName, true)) {
                return false;
            }

            /** @var $authAdapter Qs_Auth_Adapter_DbTable */
            $authAdapter = new $authAdapterClassName();
            $authAdapter->setIdentity($data);
            $result = $auth->authenticate($authAdapter);
            if ($result->isValid()) {
                return true;
            } else {
                $auth->clearIdentity();
            }
        }
        return false;
    }
}