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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\Component\HttpKernel\Controller; use Psr\Log\LoggerInterface; use Symfony\Component\HttpFoundation\Request; /** * This implementation uses the '_controller' request attribute to determine * the controller to execute. * * @author Fabien Potencier <fabien@symfony.com> * @author Tobias Schultze <http://tobion.de> */ class ControllerResolver implements ControllerResolverInterface { private ?LoggerInterface $logger; public function __construct(LoggerInterface $logger = null) { $this->logger = $logger; } public function getController(Request $request): callable|false { if (!$controller = $request->attributes->get('_controller')) { $this->logger?->warning('Unable to look for the controller as the "_controller" parameter is missing.'); return false; } if (\is_array($controller)) { if (isset($controller[0]) && \is_string($controller[0]) && isset($controller[1])) { try { $controller[0] = $this->instantiateController($controller[0]); } catch (\Error|\LogicException $e) { if (\is_callable($controller)) { return $controller; } throw $e; } } if (!\is_callable($controller)) { throw new \InvalidArgumentException(sprintf('The controller for URI "%s" is not callable: ', $request->getPathInfo()).$this->getControllerError($controller)); } return $controller; } if (\is_object($controller)) { if (!\is_callable($controller)) { throw new \InvalidArgumentException(sprintf('The controller for URI "%s" is not callable: ', $request->getPathInfo()).$this->getControllerError($controller)); } return $controller; } if (\function_exists($controller)) { return $controller; } try { $callable = $this->createController($controller); } catch (\InvalidArgumentException $e) { throw new \InvalidArgumentException(sprintf('The controller for URI "%s" is not callable: ', $request->getPathInfo()).$e->getMessage(), 0, $e); } if (!\is_callable($callable)) { throw new \InvalidArgumentException(sprintf('The controller for URI "%s" is not callable: ', $request->getPathInfo()).$this->getControllerError($callable)); } return $callable; } /** * Returns a callable for the given controller. * * @throws \InvalidArgumentException When the controller cannot be created */ protected function createController(string $controller): callable { if (!str_contains($controller, '::')) { $controller = $this->instantiateController($controller); if (!\is_callable($controller)) { throw new \InvalidArgumentException($this->getControllerError($controller)); } return $controller; } [$class, $method] = explode('::', $controller, 2); try { $controller = [$this->instantiateController($class), $method]; } catch (\Error|\LogicException $e) { try { if ((new \ReflectionMethod($class, $method))->isStatic()) { return $class.'::'.$method; } } catch (\ReflectionException) { throw $e; } throw $e; } if (!\is_callable($controller)) { throw new \InvalidArgumentException($this->getControllerError($controller)); } return $controller; } /** * Returns an instantiated controller. */ protected function instantiateController(string $class): object { return new $class(); } private function getControllerError(mixed $callable): string { if (\is_string($callable)) { if (str_contains($callable, '::')) { $callable = explode('::', $callable, 2); } else { return sprintf('Function "%s" does not exist.', $callable); } } if (\is_object($callable)) { $availableMethods = $this->getClassMethodsWithoutMagicMethods($callable); $alternativeMsg = $availableMethods ? sprintf(' or use one of the available methods: "%s"', implode('", "', $availableMethods)) : ''; return sprintf('Controller class "%s" cannot be called without a method name. You need to implement "__invoke"%s.', get_debug_type($callable), $alternativeMsg); } if (!\is_array($callable)) { return sprintf('Invalid type for controller given, expected string, array or object, got "%s".', get_debug_type($callable)); } if (!isset($callable[0]) || !isset($callable[1]) || 2 !== \count($callable)) { return 'Invalid array callable, expected [controller, method].'; } [$controller, $method] = $callable; if (\is_string($controller) && !class_exists($controller)) { return sprintf('Class "%s" does not exist.', $controller); } $className = \is_object($controller) ? get_debug_type($controller) : $controller; if (method_exists($controller, $method)) { return sprintf('Method "%s" on class "%s" should be public and non-abstract.', $method, $className); } $collection = $this->getClassMethodsWithoutMagicMethods($controller); $alternatives = []; foreach ($collection as $item) { $lev = levenshtein($method, $item); if ($lev <= \strlen($method) / 3 || str_contains($item, $method)) { $alternatives[] = $item; } } asort($alternatives); $message = sprintf('Expected method "%s" on class "%s"', $method, $className); if (\count($alternatives) > 0) { $message .= sprintf(', did you mean "%s"?', implode('", "', $alternatives)); } else { $message .= sprintf('. Available methods: "%s".', implode('", "', $collection)); } return $message; } private function getClassMethodsWithoutMagicMethods($classOrObject): array { $methods = get_class_methods($classOrObject); return array_filter($methods, function (string $method) { return 0 !== strncmp($method, '__', 2); }); } }