<?php

/**
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; under version 2
 * of the License (non-upgradable).
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * Copyright (c) 2013 (original work) Open Assessment Technologies SA (under the project TAO-PRODUCT);
 *
 */

namespace oat\tao\model\accessControl\func;

use oat\tao\model\accessControl\AccessControl;
use common_ext_ExtensionsManager;
use common_Logger;
use oat\oatbox\user\User;
use oat\oatbox\service\ServiceManager;

/**
 * Proxy for the Acl Implementation
 *
 * @access public
 * @author Joel Bout, <joel@taotesting.com>
 * @package tao

 */
class AclProxy implements AccessControl
{
    const SERVICE_ID = 'tao/FuncAccessControl';
    
    const CONFIG_KEY_IMPLEMENTATION = 'FuncAccessControl';
    
    const FALLBACK_IMPLEMENTATION_CLASS = 'oat\tao\model\accessControl\func\implementation\NoAccess';
    
    /**
     * @return FuncAccessControl
     */
    protected static function getImplementation()
    {
        return ServiceManager::getServiceManager()->get(self::SERVICE_ID);
    }
    
    /**
     * Change the implementation of the access control permanently
     *
     * @param FuncAccessControl $implementation
     * @deprecated
     */
    public static function setImplementation(FuncAccessControl $implementation)
    {
        ServiceManager::getServiceManager()->register(self::SERVICE_ID, $implementation);
    }
    
    /**
     * (non-PHPdoc)
     * @see \oat\tao\model\accessControl\AccessControl::hasAccess()
     */
    public function hasAccess(User $user, $controller, $action, $parameters)
    {
        return self::accessPossible($user, $controller, $action);
    }
    
    /**
     * (non-PHPdoc)
     * @see \oat\tao\model\accessControl\func\FuncAccessControl::accessPossible()
     */
    public static function accessPossible(User $user, $controller, $action)
    {
        return self::getImplementation()->accessPossible($user, $controller, $action);
    }
    
    /**
     * (non-PHPdoc)
     * @see \oat\tao\model\accessControl\func\FuncAccessControl::applyRule()
     */
    public static function applyRule(AccessRule $rule)
    {
        self::getImplementation()->applyRule($rule);
    }
    
    /**
     * (non-PHPdoc)
     * @see \oat\tao\model\accessControl\func\FuncAccessControl::revokeRule()
     */
    public static function revokeRule(AccessRule $rule)
    {
        self::getImplementation()->revokeRule($rule);
    }
}