Chris@0: <?php
Chris@0: 
Chris@0: /*
Chris@0:  * This file is part of the Symfony package.
Chris@0:  *
Chris@0:  * (c) Fabien Potencier <fabien@symfony.com>
Chris@0:  *
Chris@0:  * For the full copyright and license information, please view the LICENSE
Chris@0:  * file that was distributed with this source code.
Chris@0:  */
Chris@0: 
Chris@0: namespace Symfony\Component\HttpKernel\Controller;
Chris@0: 
Chris@0: use Symfony\Component\HttpFoundation\Request;
Chris@0: use Symfony\Component\HttpKernel\Controller\ArgumentResolver\DefaultValueResolver;
Chris@0: use Symfony\Component\HttpKernel\Controller\ArgumentResolver\RequestAttributeValueResolver;
Chris@0: use Symfony\Component\HttpKernel\Controller\ArgumentResolver\RequestValueResolver;
Chris@14: use Symfony\Component\HttpKernel\Controller\ArgumentResolver\SessionValueResolver;
Chris@0: use Symfony\Component\HttpKernel\Controller\ArgumentResolver\VariadicValueResolver;
Chris@0: use Symfony\Component\HttpKernel\ControllerMetadata\ArgumentMetadataFactory;
Chris@0: use Symfony\Component\HttpKernel\ControllerMetadata\ArgumentMetadataFactoryInterface;
Chris@0: 
Chris@0: /**
Chris@0:  * Responsible for resolving the arguments passed to an action.
Chris@0:  *
Chris@0:  * @author Iltar van der Berg <kjarli@gmail.com>
Chris@0:  */
Chris@0: final class ArgumentResolver implements ArgumentResolverInterface
Chris@0: {
Chris@0:     private $argumentMetadataFactory;
Chris@0: 
Chris@0:     /**
Chris@14:      * @var iterable|ArgumentValueResolverInterface[]
Chris@0:      */
Chris@0:     private $argumentValueResolvers;
Chris@0: 
Chris@17:     public function __construct(ArgumentMetadataFactoryInterface $argumentMetadataFactory = null, $argumentValueResolvers = [])
Chris@0:     {
Chris@0:         $this->argumentMetadataFactory = $argumentMetadataFactory ?: new ArgumentMetadataFactory();
Chris@0:         $this->argumentValueResolvers = $argumentValueResolvers ?: self::getDefaultArgumentValueResolvers();
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function getArguments(Request $request, $controller)
Chris@0:     {
Chris@17:         $arguments = [];
Chris@0: 
Chris@0:         foreach ($this->argumentMetadataFactory->createArgumentMetadata($controller) as $metadata) {
Chris@0:             foreach ($this->argumentValueResolvers as $resolver) {
Chris@0:                 if (!$resolver->supports($request, $metadata)) {
Chris@0:                     continue;
Chris@0:                 }
Chris@0: 
Chris@0:                 $resolved = $resolver->resolve($request, $metadata);
Chris@0: 
Chris@0:                 if (!$resolved instanceof \Generator) {
Chris@17:                     throw new \InvalidArgumentException(sprintf('%s::resolve() must yield at least one value.', \get_class($resolver)));
Chris@0:                 }
Chris@0: 
Chris@0:                 foreach ($resolved as $append) {
Chris@0:                     $arguments[] = $append;
Chris@0:                 }
Chris@0: 
Chris@0:                 // continue to the next controller argument
Chris@0:                 continue 2;
Chris@0:             }
Chris@0: 
Chris@0:             $representative = $controller;
Chris@0: 
Chris@17:             if (\is_array($representative)) {
Chris@17:                 $representative = sprintf('%s::%s()', \get_class($representative[0]), $representative[1]);
Chris@17:             } elseif (\is_object($representative)) {
Chris@17:                 $representative = \get_class($representative);
Chris@0:             }
Chris@0: 
Chris@0:             throw new \RuntimeException(sprintf('Controller "%s" requires that you provide a value for the "$%s" argument. Either the argument is nullable and no null value has been provided, no default value has been provided or because there is a non optional argument after this one.', $representative, $metadata->getName()));
Chris@0:         }
Chris@0: 
Chris@0:         return $arguments;
Chris@0:     }
Chris@0: 
Chris@0:     public static function getDefaultArgumentValueResolvers()
Chris@0:     {
Chris@17:         return [
Chris@0:             new RequestAttributeValueResolver(),
Chris@0:             new RequestValueResolver(),
Chris@14:             new SessionValueResolver(),
Chris@0:             new DefaultValueResolver(),
Chris@0:             new VariadicValueResolver(),
Chris@17:         ];
Chris@0:     }
Chris@0: }