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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\Bundle\FrameworkBundle\Controller;
use Doctrine\Common\Persistence\ManagerRegistry;
use Psr\Container\ContainerInterface;
use Symfony\Component\Form\Extension\Core\Type\FormType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\Form\FormInterface;
use Symfony\Component\HttpFoundation\BinaryFileResponse;
use Symfony\Component\HttpFoundation\JsonResponse;
use Symfony\Component\HttpFoundation\RedirectResponse;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpFoundation\ResponseHeaderBag;
use Symfony\Component\HttpFoundation\StreamedResponse;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
use Symfony\Component\HttpKernel\HttpKernelInterface;
use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
use Symfony\Component\Security\Core\Exception\AccessDeniedException;
use Symfony\Component\Security\Csrf\CsrfToken;
/**
* Common features needed in controllers.
*
* @author Fabien Potencier <fabien@symfony.com>
*
* @internal
*
* @property ContainerInterface $container
*/
trait ControllerTrait
{
/**
* Returns true if the service id is defined.
*
* @final
*/
protected function has(string $id): bool
{
return $this->container->has($id);
}
/**
* Gets a container service by its id.
*
* @return object The service
*
* @final
*/
protected function get(string $id)
{
return $this->container->get($id);
}
/**
* Generates a URL from the given parameters.
*
* @see UrlGeneratorInterface
*
* @final
*/
protected function generateUrl(string $route, array $parameters = array(), int $referenceType = UrlGeneratorInterface::ABSOLUTE_PATH): string
{
return $this->container->get('router')->generate($route, $parameters, $referenceType);
}
/**
* Forwards the request to another controller.
*
* @param string $controller The controller name (a string like Bundle\BlogBundle\Controller\PostController::indexAction)
*
* @final
*/
protected function forward(string $controller, array $path = array(), array $query = array()): Response
{
$request = $this->container->get('request_stack')->getCurrentRequest();
$path['_controller'] = $controller;
$subRequest = $request->duplicate($query, null, $path);
return $this->container->get('http_kernel')->handle($subRequest, HttpKernelInterface::SUB_REQUEST);
}
/**
* Returns a RedirectResponse to the given URL.
*
* @final
*/
protected function redirect(string $url, int $status = 302): RedirectResponse
{
return new RedirectResponse($url, $status);
}
/**
* Returns a RedirectResponse to the given route with the given parameters.
*
* @final
*/
protected function redirectToRoute(string $route, array $parameters = array(), int $status = 302): RedirectResponse
{
return $this->redirect($this->generateUrl($route, $parameters), $status);
}
/**
* Returns a JsonResponse that uses the serializer component if enabled, or json_encode.
*
* @final
*/
protected function json($data, int $status = 200, array $headers = array(), array $context = array()): JsonResponse
{
if ($this->container->has('serializer')) {
$json = $this->container->get('serializer')->serialize($data, 'json', array_merge(array(
'json_encode_options' => JsonResponse::DEFAULT_ENCODING_OPTIONS,
), $context));
return new JsonResponse($json, $status, $headers, true);
}
return new JsonResponse($data, $status, $headers);
}
/**
* Returns a BinaryFileResponse object with original or customized file name and disposition header.
*
* @param \SplFileInfo|string $file File object or path to file to be sent as response
*
* @final
*/
protected function file($file, string $fileName = null, string $disposition = ResponseHeaderBag::DISPOSITION_ATTACHMENT): BinaryFileResponse
{
$response = new BinaryFileResponse($file);
$response->setContentDisposition($disposition, null === $fileName ? $response->getFile()->getFilename() : $fileName);
return $response;
}
/**
* Adds a flash message to the current session for type.
*
* @throws \LogicException
*
* @final
*/
protected function addFlash(string $type, string $message)
{
if (!$this->container->has('session')) {
throw new \LogicException('You can not use the addFlash method if sessions are disabled. Enable them in "config/packages/framework.yaml".');
}
$this->container->get('session')->getFlashBag()->add($type, $message);
}
/**
* Checks if the attributes are granted against the current authentication token and optionally supplied subject.
*
* @throws \LogicException
*
* @final
*/
protected function isGranted($attributes, $subject = null): bool
{
if (!$this->container->has('security.authorization_checker')) {
throw new \LogicException('The SecurityBundle is not registered in your application. Try running "composer require symfony/security-bundle".');
}
return $this->container->get('security.authorization_checker')->isGranted($attributes, $subject);
}
/**
* Throws an exception unless the attributes are granted against the current authentication token and optionally
* supplied subject.
*
* @throws AccessDeniedException
*
* @final
*/
protected function denyAccessUnlessGranted($attributes, $subject = null, string $message = 'Access Denied.')
{
if (!$this->isGranted($attributes, $subject)) {
$exception = $this->createAccessDeniedException($message);
$exception->setAttributes($attributes);
$exception->setSubject($subject);
throw $exception;
}
}
/**
* Returns a rendered view.
*
* @final
*/
protected function renderView(string $view, array $parameters = array()): string
{
if ($this->container->has('templating')) {
return $this->container->get('templating')->render($view, $parameters);
}
if (!$this->container->has('twig')) {
throw new \LogicException('You can not use the "renderView" method if the Templating Component or the Twig Bundle are not available. Try running "composer require symfony/twig-bundle".');
}
return $this->container->get('twig')->render($view, $parameters);
}
/**
* Renders a view.
*
* @final
*/
protected function render(string $view, array $parameters = array(), Response $response = null): Response
{
if ($this->container->has('templating')) {
$content = $this->container->get('templating')->render($view, $parameters);
} elseif ($this->container->has('twig')) {
$content = $this->container->get('twig')->render($view, $parameters);
} else {
throw new \LogicException('You can not use the "render" method if the Templating Component or the Twig Bundle are not available. Try running "composer require symfony/twig-bundle".');
}
if (null === $response) {
$response = new Response();
}
$response->setContent($content);
return $response;
}
/**
* Streams a view.
*
* @final
*/
protected function stream(string $view, array $parameters = array(), StreamedResponse $response = null): StreamedResponse
{
if ($this->container->has('templating')) {
$templating = $this->container->get('templating');
$callback = function () use ($templating, $view, $parameters) {
$templating->stream($view, $parameters);
};
} elseif ($this->container->has('twig')) {
$twig = $this->container->get('twig');
$callback = function () use ($twig, $view, $parameters) {
$twig->display($view, $parameters);
};
} else {
throw new \LogicException('You can not use the "stream" method if the Templating Component or the Twig Bundle are not available. Try running "composer require symfony/twig-bundle".');
}
if (null === $response) {
return new StreamedResponse($callback);
}
$response->setCallback($callback);
return $response;
}
/**
* Returns a NotFoundHttpException.
*
* This will result in a 404 response code. Usage example:
*
* throw $this->createNotFoundException('Page not found!');
*
* @final
*/
protected function createNotFoundException(string $message = 'Not Found', \Exception $previous = null): NotFoundHttpException
{
return new NotFoundHttpException($message, $previous);
}
/**
* Returns an AccessDeniedException.
*
* This will result in a 403 response code. Usage example:
*
* throw $this->createAccessDeniedException('Unable to access this page!');
*
* @throws \LogicException If the Security component is not available
*
* @final
*/
protected function createAccessDeniedException(string $message = 'Access Denied.', \Exception $previous = null): AccessDeniedException
{
if (!class_exists(AccessDeniedException::class)) {
throw new \LogicException('You can not use the "createAccessDeniedException" method if the Security component is not available. Try running "composer require symfony/security-bundle".');
}
return new AccessDeniedException($message, $previous);
}
/**
* Creates and returns a Form instance from the type of the form.
*
* @final
*/
protected function createForm(string $type, $data = null, array $options = array()): FormInterface
{
return $this->container->get('form.factory')->create($type, $data, $options);
}
/**
* Creates and returns a form builder instance.
*
* @final
*/
protected function createFormBuilder($data = null, array $options = array()): FormBuilderInterface
{
return $this->container->get('form.factory')->createBuilder(FormType::class, $data, $options);
}
/**
* Shortcut to return the Doctrine Registry service.
*
* @throws \LogicException If DoctrineBundle is not available
*
* @final
*/
protected function getDoctrine(): ManagerRegistry
{
if (!$this->container->has('doctrine')) {
throw new \LogicException('The DoctrineBundle is not registered in your application. Try running "composer require symfony/orm-pack".');
}
return $this->container->get('doctrine');
}
/**
* Get a user from the Security Token Storage.
*
* @return mixed
*
* @throws \LogicException If SecurityBundle is not available
*
* @see TokenInterface::getUser()
*
* @final
*/
protected function getUser()
{
if (!$this->container->has('security.token_storage')) {
throw new \LogicException('The SecurityBundle is not registered in your application. Try running "composer require symfony/security-bundle".');
}
if (null === $token = $this->container->get('security.token_storage')->getToken()) {
return;
}
if (!\is_object($user = $token->getUser())) {
// e.g. anonymous authentication
return;
}
return $user;
}
/**
* Checks the validity of a CSRF token.
*
* @param string $id The id used when generating the token
* @param string|null $token The actual token sent with the request that should be validated
*
* @final
*/
protected function isCsrfTokenValid(string $id, ?string $token): bool
{
if (!$this->container->has('security.csrf.token_manager')) {
throw new \LogicException('CSRF protection is not enabled in your application. Enable it with the "csrf_protection" key in "config/packages/framework.yaml".');
}
return $this->container->get('security.csrf.token_manager')->isTokenValid(new CsrfToken($id, $token));
}
/**
* Dispatches a message to the bus.
*
* @param object $message The message to dispatch
*
* @final
*/
protected function dispatchMessage($message)
{
if (!$this->container->has('message_bus')) {
throw new \LogicException('The message bus is not enabled in your application. Try running "composer require symfony/messenger".');
}
return $this->container->get('message_bus')->dispatch($message);
}
}