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📄 ControllerReference.php(1.34 KB)
📄 ControllerResolver.php(4.86 KB)
📄 ControllerResolverInterface.php(1.86 KB)
📄 TraceableControllerResolver.php(1.51 KB)

Editing: ControllerResolver.php

<?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;

/**
 * ControllerResolver.
 *
 * This implementation uses the '_controller' request attribute to determine
 * the controller to execute and uses the request attributes to determine
 * the controller method arguments.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 *
 * @api
 */
class ControllerResolver implements ControllerResolverInterface
{
    private $logger;

/**
     * Constructor.
     *
     * @param LoggerInterface $logger A LoggerInterface instance
     */
    public function __construct(LoggerInterface $logger = null)
    {
        $this->logger = $logger;
    }

/**
     * {@inheritdoc}
     *
     * This method looks for a '_controller' request attribute that represents
     * the controller name (a string like ClassName::MethodName).
     *
     * @api
     */
    public function getController(Request $request)
    {
        if (!$controller = $request->attributes->get('_controller')) {
            if (null !== $this->logger) {
                $this->logger->warning('Unable to look for the controller as the "_controller" parameter is missing');
            }

return false;
        }

if (is_array($controller)) {
            return $controller;
        }

if (is_object($controller)) {
            if (method_exists($controller, '__invoke')) {
                return $controller;
            }

throw new \InvalidArgumentException(sprintf('Controller "%s" for URI "%s" is not callable.', get_class($controller), $request->getPathInfo()));
        }

if (false === strpos($controller, ':')) {
            if (method_exists($controller, '__invoke')) {
                return new $controller();
            } elseif (function_exists($controller)) {
                return $controller;
            }
        }

$callable = $this->createController($controller);

if (!is_callable($callable)) {
            throw new \InvalidArgumentException(sprintf('Controller "%s" for URI "%s" is not callable.', $controller, $request->getPathInfo()));
        }

return $callable;
    }

/**
     * {@inheritdoc}
     *
     * @api
     */
    public function getArguments(Request $request, $controller)
    {
        if (is_array($controller)) {
            $r = new \ReflectionMethod($controller[0], $controller[1]);
        } elseif (is_object($controller) && !$controller instanceof \Closure) {
            $r = new \ReflectionObject($controller);
            $r = $r->getMethod('__invoke');
        } else {
            $r = new \ReflectionFunction($controller);
        }

return $this->doGetArguments($request, $controller, $r->getParameters());
    }

protected function doGetArguments(Request $request, $controller, array $parameters)
    {
        $attributes = $request->attributes->all();
        $arguments = array();
        foreach ($parameters as $param) {
            if (array_key_exists($param->name, $attributes)) {
                $arguments[] = $attributes[$param->name];
            } elseif ($param->getClass() && $param->getClass()->isInstance($request)) {
                $arguments[] = $request;
            } elseif ($param->isDefaultValueAvailable()) {
                $arguments[] = $param->getDefaultValue();
            } else {
                if (is_array($controller)) {
                    $repr = sprintf('%s::%s()', get_class($controller[0]), $controller[1]);
                } elseif (is_object($controller)) {
                    $repr = get_class($controller);
                } else {
                    $repr = $controller;
                }

throw new \RuntimeException(sprintf('Controller "%s" requires that you provide a value for the "$%s" argument (because there is no default value or because there is a non optional argument after this one).', $repr, $param->name));
            }
        }

return $arguments;
    }

/**
     * Returns a callable for the given controller.
     *
     * @param string $controller A Controller string
     *
     * @return mixed A PHP callable
     *
     * @throws \InvalidArgumentException
     */
    protected function createController($controller)
    {
        if (false === strpos($controller, '::')) {
            throw new \InvalidArgumentException(sprintf('Unable to find controller "%s".', $controller));
        }

list($class, $method) = explode('::', $controller, 2);

if (!class_exists($class)) {
            throw new \InvalidArgumentException(sprintf('Class "%s" does not exist.', $class));
        }

return array(new $class(), $method);
    }
}

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