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<?php

/*
 * This file is part of the FOSRestBundle package.
 *
 * (c) FriendsOfSymfony <http://friendsofsymfony.github.com/>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace FOS\RestBundle\Version;

use Symfony\Component\HttpFoundation\Request;

/**
 * @author Ener-Getick <[email protected]>
 */
final class ChainVersionResolver implements VersionResolverInterface
{
    private $resolvers = [];

    /**
     * @var VersionResolverInterface[]
     */
    public function __construct(array $resolvers)
    {
        foreach ($resolvers as $resolver) {
            $this->addResolver($resolver);
        }
    }

    /**
     * {@inheritdoc}
     */
    public function resolve(Request $request): ?string
    {
        foreach ($this->resolvers as $resolver) {
            $version = $resolver->resolve($request);

            if (null !== $version) {
                return $version;
            }
        }

        return null;
    }

    public function addResolver(VersionResolverInterface $resolver): void
    {
        $this->resolvers[] = $resolver;
    }
}