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<?php | |
/** | |
* @file | |
* Contains \Drupal\Core\Routing\Enhancer\ParamConversionEnhancer. | |
*/ | |
namespace Drupal\Core\Routing\Enhancer; | |
use Drupal\Core\ParamConverter\ParamConverterManagerInterface; | |
use Drupal\Core\ParamConverter\ParamNotConvertedException; | |
use Symfony\Cmf\Component\Routing\RouteObjectInterface; | |
use Symfony\Component\EventDispatcher\EventSubscriberInterface; | |
use Symfony\Component\HttpFoundation\ParameterBag; | |
use Symfony\Component\HttpFoundation\Request; | |
use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent; | |
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException; | |
use Symfony\Component\HttpKernel\KernelEvents; | |
use Symfony\Component\Routing\Route; | |
/** | |
* Provides a route enhancer that handles parameter conversion. | |
*/ | |
class ParamConversionEnhancer implements RouteEnhancerInterface, EventSubscriberInterface { | |
/** | |
* The parameter conversion manager. | |
* | |
* @var \Drupal\Core\ParamConverter\ParamConverterManagerInterface | |
*/ | |
protected $paramConverterManager; | |
/** | |
* Constructs a new ParamConversionEnhancer. | |
* | |
* @param \Drupal\Core\ParamConverter\ParamConverterManagerInterface $param_converter_manager | |
* The parameter conversion manager. | |
*/ | |
public function __construct(ParamConverterManagerInterface $param_converter_manager) { | |
$this->paramConverterManager = $param_converter_manager; | |
} | |
/** | |
* {@inheritdoc} | |
*/ | |
public function enhance(array $defaults, Request $request) { | |
// Just run the parameter conversion once per request. | |
if (!isset($defaults['_raw_variables'])) { | |
$defaults['_raw_variables'] = $this->copyRawVariables($defaults); | |
$defaults = $this->paramConverterManager->convert($defaults); | |
} | |
return $defaults; | |
} | |
/** | |
* Store a backup of the raw values that corresponding to the route pattern. | |
* | |
* @param array $defaults | |
* The route defaults array. | |
* | |
* @return \Symfony\Component\HttpFoundation\ParameterBag | |
*/ | |
protected function copyRawVariables(array $defaults) { | |
/** @var $route \Symfony\Component\Routing\Route */ | |
$route = $defaults[RouteObjectInterface::ROUTE_OBJECT]; | |
$variables = array_flip($route->compile()->getVariables()); | |
// Foreach will copy the values from the array it iterates. Even if they | |
// are references, use it to break them. This avoids any scenarios where raw | |
// variables also get replaced with converted values. | |
$raw_variables = array(); | |
foreach (array_intersect_key($defaults, $variables) as $key => $value) { | |
$raw_variables[$key] = $value; | |
} | |
return new ParameterBag($raw_variables); | |
} | |
/** | |
* Catches failed parameter conversions and throw a 404 instead. | |
* | |
* @param \Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent $event | |
*/ | |
public function onException(GetResponseForExceptionEvent $event) { | |
$exception = $event->getException(); | |
if ($exception instanceof ParamNotConvertedException) { | |
$event->setException(new NotFoundHttpException($exception->getMessage(), $exception)); | |
} | |
} | |
/** | |
* {@inheritdoc} | |
*/ | |
public static function getSubscribedEvents() { | |
$events[KernelEvents::EXCEPTION][] = array('onException', 75); | |
return $events; | |
} | |
/** | |
* {@inheritdoc} | |
*/ | |
public function applies(Route $route) { | |
return TRUE; | |
} | |
} |