<?php
/*
* This file is part of the Silex framework.
*
* (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 Silex;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\Exception\HttpExceptionInterface;
use Symfony\Component\HttpKernel\KernelEvents;
use Symfony\Component\HttpKernel\Event\ExceptionEvent;
use Symfony\Component\HttpKernel\Event\ViewEvent;
/**
* Wraps exception listeners.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class ExceptionListenerWrapper
{
protected $app;
protected $callback;
/**
* Constructor.
*
* @param Application $app An Application instance
* @param callable $callback
*/
public function __construct(Application $app, $callback)
{
$this->app = $app;
$this->callback = $callback;
}
public function __invoke(ExceptionEvent $event)
{
$exception = $event->getThrowable();
$this->callback = $this->app['callback_resolver']->resolveCallback($this->callback);
if (!$this->shouldRun($exception)) {
return;
}
$code = $exception instanceof HttpExceptionInterface ? $exception->getStatusCode() : 500;
$response = call_user_func($this->callback, $exception, $event->getRequest(), $code, $event);
$this->ensureResponse($response, $event);
}
protected function shouldRun(\Exception $exception)
{
if (is_array($this->callback)) {
$callbackReflection = new \ReflectionMethod($this->callback[0], $this->callback[1]);
} elseif (is_object($this->callback) && !$this->callback instanceof \Closure) {
$callbackReflection = new \ReflectionObject($this->callback);
$callbackReflection = $callbackReflection->getMethod('__invoke');
} else {
$callbackReflection = new \ReflectionFunction($this->callback);
}
if ($callbackReflection->getNumberOfParameters() > 0) {
$parameters = $callbackReflection->getParameters();
$expectedException = $parameters[0];
$class = $expectedException->getType() && !$expectedException->getType()->isBuiltin() ? new \ReflectionClass($expectedException->getType()->getName()) : null;
if ($class && !$class->isInstance($exception)) {
return false;
}
}
return true;
}
protected function ensureResponse($response, ExceptionEvent $event)
{
if ($response instanceof Response) {
$event->setResponse($response);
} else {
$viewEvent = new ViewEvent($this->app['kernel'], $event->getRequest(), $event->getRequestType(), $response);
$this->app['dispatcher']->dispatch($viewEvent, KernelEvents::VIEW);
if ($viewEvent->hasResponse()) {
$event->setResponse($viewEvent->getResponse());
}
}
}
}
