Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\Core\Access;
Chris@0: 
Chris@0: use Drupal\Core\Controller\ControllerResolverInterface;
Chris@0: use Drupal\Core\Routing\Access\AccessInterface as RoutingAccessInterface;
Chris@0: use Drupal\Core\Routing\RouteMatchInterface;
Chris@0: use Drupal\Core\Session\AccountInterface;
Chris@0: use Symfony\Component\Routing\Route;
Chris@0: 
Chris@0: /**
Chris@0:  * Defines an access checker that allows specifying a custom method for access.
Chris@0:  *
Chris@0:  * You should only use it when you are sure that the access callback will not be
Chris@0:  * reused. Good examples in core are Edit or Toolbar module.
Chris@0:  *
Chris@0:  * The method is called on another instance of the controller class, so you
Chris@0:  * cannot reuse any stored property of your actual controller instance used
Chris@0:  * to generate the output.
Chris@0:  */
Chris@0: class CustomAccessCheck implements RoutingAccessInterface {
Chris@0: 
Chris@0:   /**
Chris@0:    * The controller resolver.
Chris@0:    *
Chris@0:    * @var \Drupal\Core\Controller\ControllerResolverInterface
Chris@0:    */
Chris@0:   protected $controllerResolver;
Chris@0: 
Chris@0:   /**
Chris@0:    * The arguments resolver.
Chris@0:    *
Chris@0:    * @var \Drupal\Core\Access\AccessArgumentsResolverFactoryInterface
Chris@0:    */
Chris@0:   protected $argumentsResolverFactory;
Chris@0: 
Chris@0:   /**
Chris@0:    * Constructs a CustomAccessCheck instance.
Chris@0:    *
Chris@0:    * @param \Drupal\Core\Controller\ControllerResolverInterface $controller_resolver
Chris@0:    *   The controller resolver.
Chris@0:    * @param \Drupal\Core\Access\AccessArgumentsResolverFactoryInterface $arguments_resolver_factory
Chris@0:    *   The arguments resolver factory.
Chris@0:    */
Chris@0:   public function __construct(ControllerResolverInterface $controller_resolver, AccessArgumentsResolverFactoryInterface $arguments_resolver_factory) {
Chris@0:     $this->controllerResolver = $controller_resolver;
Chris@0:     $this->argumentsResolverFactory = $arguments_resolver_factory;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * Checks access for the account and route using the custom access checker.
Chris@0:    *
Chris@0:    * @param \Symfony\Component\Routing\Route $route
Chris@0:    *   The route.
Chris@0:    * @param \Drupal\Core\Routing\RouteMatchInterface $route_match
Chris@0:    *   The route match object to be checked.
Chris@0:    * @param \Drupal\Core\Session\AccountInterface $account
Chris@0:    *   The account being checked.
Chris@0:    *
Chris@0:    * @return \Drupal\Core\Access\AccessResultInterface
Chris@0:    *   The access result.
Chris@0:    */
Chris@0:   public function access(Route $route, RouteMatchInterface $route_match, AccountInterface $account) {
Chris@17:     try {
Chris@17:       $callable = $this->controllerResolver->getControllerFromDefinition($route->getRequirement('_custom_access'));
Chris@17:     }
Chris@17:     catch (\InvalidArgumentException $e) {
Chris@17:       // The custom access controller method was not found.
Chris@17:       throw new \BadMethodCallException(sprintf('The "%s" method is not callable as a _custom_access callback in route "%s"', $route->getRequirement('_custom_access'), $route->getPath()));
Chris@17:     }
Chris@17: 
Chris@0:     $arguments_resolver = $this->argumentsResolverFactory->getArgumentsResolver($route_match, $account);
Chris@0:     $arguments = $arguments_resolver->getArguments($callable);
Chris@0: 
Chris@0:     return call_user_func_array($callable, $arguments);
Chris@0:   }
Chris@0: 
Chris@0: }