<?php

/*

 * This file is part of the Symfony framework.

 *

 * (c) Fabien Potencier <fabien@symfony.com>

 *

 * This source file is subject to the MIT license that is bundled

 * with this source code in the file LICENSE.

 */

namespace Symfony\Component\DependencyInjection\Compiler;

use Symfony\Component\DependencyInjection\Definition;

use Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException;

use Symfony\Component\DependencyInjection\ContainerInterface;

use Symfony\Component\DependencyInjection\Reference;

use Symfony\Component\DependencyInjection\ContainerBuilder;

/**

 * Checks that all references are pointing to a valid service.

 *

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

 */

class CheckExceptionOnInvalidReferenceBehaviorPass implements CompilerPassInterface

{

    private $container;

    private $sourceId;

    public function process(ContainerBuilder $container)

    {

        $this->container = $container;

        foreach ($container->getDefinitions() as $id => $definition) {

            $this->sourceId = $id;

            $this->processDefinition($definition);

        }

    }

    private function processDefinition(Definition $definition)

    {

        $this->processReferences($definition->getArguments());

        $this->processReferences($definition->getMethodCalls());

        $this->processReferences($definition->getProperties());

    }

    private function processReferences(array $arguments)

    {

        foreach ($arguments as $argument) {

            if (is_array($argument)) {

                $this->processReferences($argument);

            } else if ($argument instanceof Definition) {

                $this->processDefinition($argument);

            } else if ($argument instanceof Reference && ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE === $argument->getInvalidBehavior()) {

                $destId = (string) $argument;

                if (!$this->container->has($destId)) {

                    throw new ServiceNotFoundException($destId, $this->sourceId);

                }

            }

        }

    }

}