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Filename : FallbackNodeProvider.php
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<?php

/**
 * This file is part of the ramsey/uuid library
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 *
 * @copyright Copyright (c) Ben Ramsey <ben@benramsey.com>
 * @license http://opensource.org/licenses/MIT MIT
 */

declare(strict_types=1);

namespace Ramsey\Uuid\Provider\Node;

use Ramsey\Uuid\Exception\NodeException;
use Ramsey\Uuid\Provider\NodeProviderInterface;
use Ramsey\Uuid\Type\Hexadecimal;

/**
 * FallbackNodeProvider retrieves the system node ID by stepping through a list
 * of providers until a node ID can be obtained
 */
class FallbackNodeProvider implements NodeProviderInterface
{
    /**
     * @var NodeProviderCollection
     */
    private $nodeProviders;

    /**
     * @param NodeProviderCollection $providers Array of node providers
     */
    public function __construct(NodeProviderCollection $providers)
    {
        $this->nodeProviders = $providers;
    }

    public function getNode(): Hexadecimal
    {
        $lastProviderException = null;

        foreach ($this->nodeProviders as $provider) {
            try {
                return $provider->getNode();
            } catch (NodeException $exception) {
                $lastProviderException = $exception;

                continue;
            }
        }

        throw new NodeException(
            'Unable to find a suitable node provider',
            0,
            $lastProviderException
        );
    }
}