ReverseContainer.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\DependencyInjection;

use Psr\Container\ContainerInterface;
use Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException;

/**
 * Turns public and "container.reversible" services back to their ids.
 *
 * @author Nicolas Grekas <p@tchwork.com>
 */
final class ReverseContainer {
    private \Closure $getServiceId;
    public function __construct(Container $serviceContainer, ContainerInterface $reversibleLocator, string $tagName = 'container.reversible') {
        $this->getServiceId = \Closure::bind(fn(object $service): ?string => (array_search($service, $this->services, true) ?: array_search($service, $this->privates, true)) ?: null, $serviceContainer, Container::class);
    }
    
    /**
     * Returns the id of the passed object when it exists as a service.
     *
     * To be reversible, services need to be either public or be tagged with "container.reversible".
     */
    public function getId(object $service) : ?string {
        if ($this->serviceContainer === $service) {
            return 'service_container';
        }
        if (null === ($id = ($this->getServiceId)($service))) {
            return null;
        }
        if ($this->serviceContainer
            ->has($id) || $this->reversibleLocator
            ->has($id)) {
            return $id;
        }
        return null;
    }
    
    /**
     * @throws ServiceNotFoundException When the service is not reversible
     */
    public function getService(string $id) : object {
        if ($this->reversibleLocator
            ->has($id)) {
            return $this->reversibleLocator
                ->get($id);
        }
        if (isset($this->serviceContainer
            ->getRemovedIds()[$id])) {
            throw new ServiceNotFoundException($id, null, null, [], \sprintf('The "%s" service is private and cannot be accessed by reference. You should either make it public, or tag it as "%s".', $id, $this->tagName));
        }
        return $this->serviceContainer
            ->get($id);
    }

}