<?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\Routing;

use Psr\Log\LoggerInterface;
use Symfony\Component\Config\ConfigCacheFactory;
use Symfony\Component\Config\ConfigCacheFactoryInterface;
use Symfony\Component\Config\ConfigCacheInterface;
use Symfony\Component\Config\Loader\LoaderInterface;
use Symfony\Component\ExpressionLanguage\ExpressionFunctionProviderInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Routing\Generator\CompiledUrlGenerator;
use Symfony\Component\Routing\Generator\ConfigurableRequirementsInterface;
use Symfony\Component\Routing\Generator\Dumper\CompiledUrlGeneratorDumper;
use Symfony\Component\Routing\Generator\Dumper\GeneratorDumperInterface;
use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
use Symfony\Component\Routing\Matcher\CompiledUrlMatcher;
use Symfony\Component\Routing\Matcher\Dumper\CompiledUrlMatcherDumper;
use Symfony\Component\Routing\Matcher\Dumper\MatcherDumperInterface;
use Symfony\Component\Routing\Matcher\RequestMatcherInterface;
use Symfony\Component\Routing\Matcher\UrlMatcherInterface;

/**
 * The Router class is an example of the integration of all pieces of the
 * routing system for easier use.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
class Router implements RouterInterface, RequestMatcherInterface
{
    /**
     * @var UrlMatcherInterface|null
     */
    protected $matcher;

    /**
     * @var UrlGeneratorInterface|null
     */
    protected $generator;

    /**
     * @var RequestContext
     */
    protected $context;

    /**
     * @var LoaderInterface
     */
    protected $loader;

    /**
     * @var RouteCollection|null
     */
    protected $collection;

    /**
     * @var mixed
     */
    protected $resource;

    /**
     * @var array
     */
    protected $options = [];

    /**
     * @var LoggerInterface|null
     */
    protected $logger;

    /**
     * @var string|null
     */
    protected $defaultLocale;

    private $configCacheFactory;

    /**
     * @var ExpressionFunctionProviderInterface[]
     */
    private array $expressionLanguageProviders = [];

    private static ?array $cache = [];

    public function __construct(LoaderInterface $loader, mixed $resource, array $options = [], RequestContext $context = null, LoggerInterface $logger = null, string $defaultLocale = null)
    {
        $this->loader = $loader;
        $this->resource = $resource;
        $this->logger = $logger;
        $this->context = $context ?? new RequestContext();
        $this->setOptions($options);
        $this->defaultLocale = $defaultLocale;
    }

    /**
     * Sets options.
     *
     * Available options:
     *
     *   * cache_dir:              The cache directory (or null to disable caching)
     *   * debug:                  Whether to enable debugging or not (false by default)
     *   * generator_class:        The name of a UrlGeneratorInterface implementation
     *   * generator_dumper_class: The name of a GeneratorDumperInterface implementation
     *   * matcher_class:          The name of a UrlMatcherInterface implementation
     *   * matcher_dumper_class:   The name of a MatcherDumperInterface implementation
     *   * resource_type:          Type hint for the main resource (optional)
     *   * strict_requirements:    Configure strict requirement checking for generators
     *                             implementing ConfigurableRequirementsInterface (default is true)
     *
     * @throws \InvalidArgumentException When unsupported option is provided
     */
    public function setOptions(array $options)
    {
        $this->options = [
            'cache_dir' => null,
            'debug' => false,
            'generator_class' => CompiledUrlGenerator::class,
            'generator_dumper_class' => CompiledUrlGeneratorDumper::class,
            'matcher_class' => CompiledUrlMatcher::class,
            'matcher_dumper_class' => CompiledUrlMatcherDumper::class,
            'resource_type' => null,
            'strict_requirements' => true,
        ];

        // check option names and live merge, if errors are encountered Exception will be thrown
        $invalid = [];
        foreach ($options as $key => $value) {
            if (\array_key_exists($key, $this->options)) {
                $this->options[$key] = $value;
            } else {
                $invalid[] = $key;
            }
        }

        if ($invalid) {
            throw new \InvalidArgumentException(sprintf('The Router does not support the following options: "%s".', implode('", "', $invalid)));
        }
    }

    /**
     * Sets an option.
     *
     * @throws \InvalidArgumentException
     */
    public function setOption(string $key, mixed $value)
    {
        if (!\array_key_exists($key, $this->options)) {
            throw new \InvalidArgumentException(sprintf('The Router does not support the "%s" option.', $key));
        }

        $this->options[$key] = $value;
    }

    /**
     * Gets an option value.
     *
     * @throws \InvalidArgumentException
     */
    public function getOption(string $key): mixed
    {
        if (!\array_key_exists($key, $this->options)) {
            throw new \InvalidArgumentException(sprintf('The Router does not support the "%s" option.', $key));
        }

        return $this->options[$key];
    }

    /**
     * {@inheritdoc}
     */
    public function getRouteCollection()
    {
        if (null === $this->collection) {
            $this->collection = $this->loader->load($this->resource, $this->options['resource_type']);
        }

        return $this->collection;
    }

    /**
     * {@inheritdoc}
     */
    public function setContext(RequestContext $context)
    {
        $this->context = $context;

        if (null !== $this->matcher) {
            $this->getMatcher()->setContext($context);
        }
        if (null !== $this->generator) {
            $this->getGenerator()->setContext($context);
        }
    }

    /**
     * {@inheritdoc}
     */
    public function getContext(): RequestContext
    {
        return $this->context;
    }

    /**
     * Sets the ConfigCache factory to use.
     */
    public function setConfigCacheFactory(ConfigCacheFactoryInterface $configCacheFactory)
    {
        $this->configCacheFactory = $configCacheFactory;
    }

    /**
     * {@inheritdoc}
     */
    public function generate(string $name, array $parameters = [], int $referenceType = self::ABSOLUTE_PATH): string
    {
        return $this->getGenerator()->generate($name, $parameters, $referenceType);
    }

    /**
     * {@inheritdoc}
     */
    public function match(string $pathinfo): array
    {
        return $this->getMatcher()->match($pathinfo);
    }

    /**
     * {@inheritdoc}
     */
    public function matchRequest(Request $request): array
    {
        $matcher = $this->getMatcher();
        if (!$matcher instanceof RequestMatcherInterface) {
            // fallback to the default UrlMatcherInterface
            return $matcher->match($request->getPathInfo());
        }

        return $matcher->matchRequest($request);
    }

    /**
     * Gets the UrlMatcher or RequestMatcher instance associated with this Router.
     */
    public function getMatcher(): UrlMatcherInterface|RequestMatcherInterface
    {
        if (null !== $this->matcher) {
            return $this->matcher;
        }

        if (null === $this->options['cache_dir']) {
            $routes = $this->getRouteCollection();
            $compiled = is_a($this->options['matcher_class'], CompiledUrlMatcher::class, true);
            if ($compiled) {
                $routes = (new CompiledUrlMatcherDumper($routes))->getCompiledRoutes();
            }
            $this->matcher = new $this->options['matcher_class']($routes, $this->context);
            if (method_exists($this->matcher, 'addExpressionLanguageProvider')) {
                foreach ($this->expressionLanguageProviders as $provider) {
                    $this->matcher->addExpressionLanguageProvider($provider);
                }
            }

            return $this->matcher;
        }

        $cache = $this->getConfigCacheFactory()->cache($this->options['cache_dir'].'/url_matching_routes.php',
            function (ConfigCacheInterface $cache) {
                $dumper = $this->getMatcherDumperInstance();
                if (method_exists($dumper, 'addExpressionLanguageProvider')) {
                    foreach ($this->expressionLanguageProviders as $provider) {
                        $dumper->addExpressionLanguageProvider($provider);
                    }
                }

                $cache->write($dumper->dump(), $this->getRouteCollection()->getResources());
            }
        );

        return $this->matcher = new $this->options['matcher_class'](self::getCompiledRoutes($cache->getPath()), $this->context);
    }

    /**
     * Gets the UrlGenerator instance associated with this Router.
     */
    public function getGenerator(): UrlGeneratorInterface
    {
        if (null !== $this->generator) {
            return $this->generator;
        }

        if (null === $this->options['cache_dir']) {
            $routes = $this->getRouteCollection();
            $compiled = is_a($this->options['generator_class'], CompiledUrlGenerator::class, true);
            if ($compiled) {
                $generatorDumper = new CompiledUrlGeneratorDumper($routes);
                $routes = array_merge($generatorDumper->getCompiledRoutes(), $generatorDumper->getCompiledAliases());
            }
            $this->generator = new $this->options['generator_class']($routes, $this->context, $this->logger, $this->defaultLocale);
        } else {
            $cache = $this->getConfigCacheFactory()->cache($this->options['cache_dir'].'/url_generating_routes.php',
                function (ConfigCacheInterface $cache) {
                    $dumper = $this->getGeneratorDumperInstance();

                    $cache->write($dumper->dump(), $this->getRouteCollection()->getResources());
                }
            );

            $this->generator = new $this->options['generator_class'](self::getCompiledRoutes($cache->getPath()), $this->context, $this->logger, $this->defaultLocale);
        }

        if ($this->generator instanceof ConfigurableRequirementsInterface) {
            $this->generator->setStrictRequirements($this->options['strict_requirements']);
        }

        return $this->generator;
    }

    public function addExpressionLanguageProvider(ExpressionFunctionProviderInterface $provider)
    {
        $this->expressionLanguageProviders[] = $provider;
    }

    protected function getGeneratorDumperInstance(): GeneratorDumperInterface
    {
        return new $this->options['generator_dumper_class']($this->getRouteCollection());
    }

    protected function getMatcherDumperInstance(): MatcherDumperInterface
    {
        return new $this->options['matcher_dumper_class']($this->getRouteCollection());
    }

    /**
     * Provides the ConfigCache factory implementation, falling back to a
     * default implementation if necessary.
     */
    private function getConfigCacheFactory(): ConfigCacheFactoryInterface
    {
        return $this->configCacheFactory ??= new ConfigCacheFactory($this->options['debug']);
    }

    private static function getCompiledRoutes(string $path): array
    {
        if ([] === self::$cache && \function_exists('opcache_invalidate') && filter_var(\ini_get('opcache.enable'), \FILTER_VALIDATE_BOOLEAN) && (!\in_array(\PHP_SAPI, ['cli', 'phpdbg'], true) || filter_var(\ini_get('opcache.enable_cli'), \FILTER_VALIDATE_BOOLEAN))) {
            self::$cache = null;
        }

        if (null === self::$cache) {
            return require $path;
        }

        return self::$cache[$path] ??= require $path;
    }
}

• [D] Annotation
• [D] DependencyInjection
• [D] Exception
• [D] Generator
• [D] Loader
• [D] Matcher
• [F] Alias.php
  Delete
• [F] CHANGELOG.md
  Delete
• [F] CompiledRoute.php
  Delete
• [F] composer.json
  Delete
• [F] LICENSE
  Delete
• [F] README.md
  Delete
• [F] RequestContext.php
  Delete
• [F] RequestContextAwareInterface.php
  Delete
• [F] Route.php
  Delete
• [F] RouteCollection.php
  Delete
• [F] RouteCompiler.php
  Delete
• [F] RouteCompilerInterface.php
  Delete
• [F] Router.php
  Delete
• [F] RouterInterface.php
  Delete

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Encryption is a process that transforms data into a secure format, known as ciphertext, which can only be deciphered using a specific decryption key. This means that even if data is intercepted during transmission, it remains unreadable and protected from unauthorized access. Encryption is essential in safeguarding sensitive payment information, such as credit card details and personal data, during online transactions.
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