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name : ControllerArgumentsEvent.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\Event;

use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpKernel\HttpKernelInterface;

/**
 * Allows filtering of controller arguments.
 *
 * You can call getController() to retrieve the controller and getArguments
 * to retrieve the current arguments. With setArguments() you can replace
 * arguments that are used to call the controller.
 *
 * Arguments set in the event must be compatible with the signature of the
 * controller.
 *
 * @author Christophe Coevoet <stof@notk.org>
 */
final class ControllerArgumentsEvent extends KernelEvent
{
    private ControllerEvent $controllerEvent;
    private array $namedArguments;

    public function __construct(
        HttpKernelInterface $kernel,
        callable|ControllerEvent $controller,
        private array $arguments,
        Request $request,
        ?int $requestType,
    ) {
        parent::__construct($kernel, $request, $requestType);

        if (!$controller instanceof ControllerEvent) {
            $controller = new ControllerEvent($kernel, $controller, $request, $requestType);
        }

        $this->controllerEvent = $controller;
    }

    public function getController(): callable
    {
        return $this->controllerEvent->getController();
    }

    /**
     * @param array<class-string, list<object>>|null $attributes
     */
    public function setController(callable $controller, ?array $attributes = null): void
    {
        $this->controllerEvent->setController($controller, $attributes);
        unset($this->namedArguments);
    }

    public function getArguments(): array
    {
        return $this->arguments;
    }

    public function setArguments(array $arguments): void
    {
        $this->arguments = $arguments;
        unset($this->namedArguments);
    }

    public function getNamedArguments(): array
    {
        if (isset($this->namedArguments)) {
            return $this->namedArguments;
        }

        $namedArguments = [];
        $arguments = $this->arguments;

        foreach ($this->controllerEvent->getControllerReflector()->getParameters() as $i => $param) {
            if ($param->isVariadic()) {
                $namedArguments[$param->name] = \array_slice($arguments, $i);
                break;
            }
            if (\array_key_exists($i, $arguments)) {
                $namedArguments[$param->name] = $arguments[$i];
            } elseif ($param->isDefaultvalueAvailable()) {
                $namedArguments[$param->name] = $param->getDefaultValue();
            }
        }

        return $this->namedArguments = $namedArguments;
    }

    /**
     * @template T of class-string|null
     *
     * @param T $className
     *
     * @return array<class-string, list<object>>|list<object>
     *
     * @psalm-return (T is null ? array<class-string, list<object>> : list<object>)
     */
    public function getAttributes(?string $className = null): array
    {
        return $this->controllerEvent->getAttributes($className);
    }
}
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