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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\HttpKernel\Controller\ArgumentResolver;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpKernel\Controller\ArgumentValueResolverInterface;
use Symfony\Component\HttpKernel\Controller\ValueResolverInterface;
use Symfony\Component\HttpKernel\ControllerMetadata\ArgumentMetadata;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
/**
* Attempt to resolve backed enum cases from request attributes, for a route path parameter,
* leading to a 404 Not Found if the attribute value isn't a valid backing value for the enum type.
*
* @author Maxime Steinhausser <maxime.steinhausser@gmail.com>
*
* @final since Symfony 6.2
*/
class BackedEnumValueResolver implements ArgumentValueResolverInterface, ValueResolverInterface
{
/**
* @deprecated since Symfony 6.2, use resolve() instead
*/
public function supports(Request $request, ArgumentMetadata $argument): bool
{
@trigger_deprecation('symfony/http-kernel', '6.2', 'The "%s()" method is deprecated, use "resolve()" instead.', __METHOD__);
if (!is_subclass_of($argument->getType(), \BackedEnum::class)) {
return false;
}
if ($argument->isVariadic()) {
// only target route path parameters, which cannot be variadic.
return false;
}
// do not support if no value can be resolved at all
// letting the \Symfony\Component\HttpKernel\Controller\ArgumentResolver\DefaultValueResolver be used
// or \Symfony\Component\HttpKernel\Controller\ArgumentResolver fail with a meaningful error.
return $request->attributes->has($argument->getName());
}
public function resolve(Request $request, ArgumentMetadata $argument): iterable
{
if (!is_subclass_of($argument->getType(), \BackedEnum::class)) {
return [];
}
if ($argument->isVariadic()) {
// only target route path parameters, which cannot be variadic.
return [];
}
// do not support if no value can be resolved at all
// letting the \Symfony\Component\HttpKernel\Controller\ArgumentResolver\DefaultValueResolver be used
// or \Symfony\Component\HttpKernel\Controller\ArgumentResolver fail with a meaningful error.
if (!$request->attributes->has($argument->getName())) {
return [];
}
$value = $request->attributes->get($argument->getName());
if (null === $value) {
return [null];
}
if ($value instanceof \BackedEnum) {
return [$value];
}
if (!\is_int($value) && !\is_string($value)) {
throw new \LogicException(sprintf('Could not resolve the "%s $%s" controller argument: expecting an int or string, got "%s".', $argument->getType(), $argument->getName(), get_debug_type($value)));
}
/** @var class-string<\BackedEnum> $enumType */
$enumType = $argument->getType();
try {
return [$enumType::from($value)];
} catch (\ValueError $e) {
throw new NotFoundHttpException(sprintf('Could not resolve the "%s $%s" controller argument: ', $argument->getType(), $argument->getName()).$e->getMessage(), $e);
}
}
}
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