<?php

/*

 * Copyright 2011 Johannes M. Schmitt <schmittjoh@gmail.com>

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 * http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

namespace JMS\SecurityExtraBundle\Metadata\Driver;

use JMS\SecurityExtraBundle\Annotation\RunAs;

use JMS\SecurityExtraBundle\Annotation\SatisfiesParentSecurityPolicy;

use JMS\SecurityExtraBundle\Annotation\SecureReturn;

use JMS\SecurityExtraBundle\Annotation\SecureParam;

use JMS\SecurityExtraBundle\Annotation\Secure;

use JMS\SecurityExtraBundle\Metadata\MethodMetadata;

/**

 * Converts annotations to method metadata

 *

 * @author Johannes M. Schmitt <schmittjoh@gmail.com>

 */

class AnnotationConverter

{

    public function convertMethodAnnotations(\ReflectionMethod $method, array $annotations)

    {

        $parameters = array();

        foreach ($method->getParameters() as $index => $parameter) {

            $parameters[$parameter->getName()] = $index;

        }

        $methodMetadata = new MethodMetadata($method->getDeclaringClass()->getName(), $method->getName());

        $hasSecurityMetadata = false;

        foreach ($annotations as $annotation) {

            if ($annotation instanceof Secure) {

                $methodMetadata->roles = $annotation->roles;

                $hasSecurityMetadata = true;

            } else if ($annotation instanceof SecureParam) {

                if (!isset($parameters[$annotation->name])) {

                    throw new \InvalidArgumentException(sprintf('The parameter "%s" does not exist for method "%s".', $annotation->name, $method->getName()));

                }

                $methodMetadata->addParamPermissions($parameters[$annotation->name], $annotation->permissions);

                $hasSecurityMetadata = true;

            } else if ($annotation instanceof SecureReturn) {

                $methodMetadata->returnPermissions = $annotation->permissions;

                $hasSecurityMetadata = true;

            } else if ($annotation instanceof SatisfiesParentSecurityPolicy) {

                $methodMetadata->satisfiesParentSecurityPolicy = true;

                $hasSecurityMetadata = true;

            } else if ($annotation instanceof RunAs) {

                $methodMetadata->runAsRoles = $annotation->roles;

                $hasSecurityMetadata = true;

            }

        }

        return $hasSecurityMetadata ? $methodMetadata : null;

    }

}