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<?php
namespace App\Listener;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpFoundation\JsonResponse;
use Symfony\Component\HttpFoundation\Session\SessionInterface;
use Symfony\Component\HttpKernel\Event\FilterResponseEvent;
use Symfony\Component\HttpKernel\KernelEvents;
class Flash implements EventSubscriberInterface
{
protected $session;
public function __construct(SessionInterface $session)
{
$this->session = $session;
}
public function onKernelResponse(FilterResponseEvent $event)
{
$response = $event->getResponse();
// modify JSON response object
if ($response instanceof JsonResponse) {
// Embed flash messages to the JSON response if there are any
$flashMessages = $this->session->getFlashBag()->all();
if (!empty($flashMessages)) {
// Decode the JSON response before encoding it again with additional data
$data = json_decode($response->getContent(), true);
$data['messages'] = $flashMessages;
$response->setData($data);
}
}
}
public static function getSubscribedEvents()
{
return [
KernelEvents::RESPONSE => 'onKernelResponse',
];
}
}