<?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\EventListener;

use Psr\Log\LoggerInterface;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\RequestStack;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\Event\ExceptionEvent;
use Symfony\Component\HttpKernel\Event\RequestEvent;
use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
use Symfony\Component\HttpKernel\Exception\MethodNotAllowedHttpException;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
use Symfony\Component\HttpKernel\Kernel;
use Symfony\Component\HttpKernel\KernelEvents;
use Symfony\Component\Routing\Exception\MethodNotAllowedException;
use Symfony\Component\Routing\Exception\NoConfigurationException;
use Symfony\Component\Routing\Exception\ResourceNotFoundException;
use Symfony\Component\Routing\Matcher\RequestMatcherInterface;
use Symfony\Component\Routing\Matcher\UrlMatcherInterface;
use Symfony\Component\Routing\RequestContext;
use Symfony\Component\Routing\RequestContextAwareInterface;

/**
 * Initializes the context from the request and sets request attributes based on a matching route.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 * @author Yonel Ceruto <yonelceruto@gmail.com>
 *
 * @final
 */
class RouterListener implements EventSubscriberInterface
{
    private RequestContext $context;

    /**
     * @param RequestContext|null $context The RequestContext (can be null when $matcher implements RequestContextAwareInterface)
     *
     * @throws \InvalidArgumentException
     */
    public function __construct(
        private UrlMatcherInterface|RequestMatcherInterface $matcher,
        private RequestStack $requestStack,
        ?RequestContext $context = null,
        private ?LoggerInterface $logger = null,
        private ?string $projectDir = null,
        private bool $debug = true,
    ) {
        if (null === $context && !$matcher instanceof RequestContextAwareInterface) {
            throw new \InvalidArgumentException('You must either pass a RequestContext or the matcher must implement RequestContextAwareInterface.');
        }

        $this->context = $context ?? $matcher->getContext();
    }

    private function setCurrentRequest(?Request $request): void
    {
        if (null !== $request) {
            try {
                $this->context->fromRequest($request);
            } catch (\UnexpectedValueException $e) {
                throw new BadRequestHttpException($e->getMessage(), $e, $e->getCode());
            }
        }
    }

    /**
     * After a sub-request is done, we need to reset the routing context to the parent request so that the URL generator
     * operates on the correct context again.
     */
    public function onKernelFinishRequest(): void
    {
        $this->setCurrentRequest($this->requestStack->getParentRequest());
    }

    public function onKernelRequest(RequestEvent $event): void
    {
        $request = $event->getRequest();

        $this->setCurrentRequest($request);

        if ($request->attributes->has('_controller')) {
            // routing is already done
            return;
        }

        // add attributes based on the request (routing)
        try {
            // matching a request is more powerful than matching a URL path + context, so try that first
            if ($this->matcher instanceof RequestMatcherInterface) {
                $parameters = $this->matcher->matchRequest($request);
            } else {
                $parameters = $this->matcher->match($request->getPathInfo());
            }

            $this->logger?->info('Matched route "{route}".', [
                'route' => $parameters['_route'] ?? 'n/a',
                'route_parameters' => $parameters,
                'request_uri' => $request->getUri(),
                'method' => $request->getMethod(),
            ]);

            $attributes = $parameters;
            if ($mapping = $parameters['_route_mapping'] ?? false) {
                unset($parameters['_route_mapping']);
                $mappedAttributes = [];
                $attributes = [];

                foreach ($parameters as $parameter => $value) {
                    $attribute = $mapping[$parameter] ?? $parameter;

                    if (!isset($mappedAttributes[$attribute])) {
                        $attributes[$attribute] = $value;
                        $mappedAttributes[$attribute] = $parameter;
                    } elseif ('' !== $mappedAttributes[$attribute]) {
                        $attributes[$attribute] = [
                            $mappedAttributes[$attribute] => $attributes[$attribute],
                            $parameter => $value,
                        ];
                        $mappedAttributes[$attribute] = '';
                    } else {
                        $attributes[$attribute][$parameter] = $value;
                    }
                }

                $attributes['_route_mapping'] = $mapping;
            }

            $request->attributes->add($attributes);
            unset($parameters['_route'], $parameters['_controller']);
            $request->attributes->set('_route_params', $parameters);
        } catch (ResourceNotFoundException $e) {
            $message = sprintf('No route found for "%s %s"', $request->getMethod(), $request->getUriForPath($request->getPathInfo()));

            if ($referer = $request->headers->get('referer')) {
                $message .= sprintf(' (from "%s")', $referer);
            }

            throw new NotFoundHttpException($message, $e);
        } catch (MethodNotAllowedException $e) {
            $message = sprintf('No route found for "%s %s": Method Not Allowed (Allow: %s)', $request->getMethod(), $request->getUriForPath($request->getPathInfo()), implode(', ', $e->getAllowedMethods()));

            throw new MethodNotAllowedHttpException($e->getAllowedMethods(), $message, $e);
        }
    }

    public function onKernelException(ExceptionEvent $event): void
    {
        if (!$this->debug || !($e = $event->getThrowable()) instanceof NotFoundHttpException) {
            return;
        }

        if ($e->getPrevious() instanceof NoConfigurationException) {
            $event->setResponse($this->createWelcomeResponse());
        }
    }

    public static function getSubscribedEvents(): array
    {
        return [
            KernelEvents::REQUEST => [['onKernelRequest', 32]],
            KernelEvents::FINISH_REQUEST => [['onKernelFinishRequest', 0]],
            KernelEvents::EXCEPTION => ['onKernelException', -64],
        ];
    }

    private function createWelcomeResponse(): Response
    {
        $version = Kernel::VERSION;
        $projectDir = realpath((string) $this->projectDir).\DIRECTORY_SEPARATOR;
        $docVersion = substr(Kernel::VERSION, 0, 3);

        ob_start();
        include \dirname(__DIR__).'/Resources/welcome.html.php';

        return new Response(ob_get_clean(), Response::HTTP_NOT_FOUND);
    }
}

.NET Framework

Project Request

ProjectC

Vehicle Maintenance

Movie Navigator

Customers Exchange

ATM

.NET Core

Mail Daemon

Custom

Buns of code

PHP

Mediabox

Loan Castle

Content Management

Laravel

Phone Check

Frontend

Forex Wall

Business projects

Certification Center

Amerikas Auto

Pet projects

Geolocation Assistant

Web Dynamics

Blackball

Good old times

DOS Clock

BrainOut

Airport Administrator

Atomizer

Mediabox