60 lines
1.6 KiB
PHP
60 lines
1.6 KiB
PHP
<?php
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/**
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* This file is part of the ramsey/uuid library
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*
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* @copyright Copyright (c) Ben Ramsey <ben@benramsey.com>
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* @license http://opensource.org/licenses/MIT MIT
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* @link https://benramsey.com/projects/ramsey-uuid/ Documentation
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* @link https://packagist.org/packages/ramsey/uuid Packagist
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* @link https://github.com/ramsey/uuid GitHub
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*/
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namespace Ramsey\Uuid\Provider\Node;
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use Exception;
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use Ramsey\Uuid\Provider\NodeProviderInterface;
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/**
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* FallbackNodeProvider attempts to gain the system host ID from an array of
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* providers, falling back to the next in line in the event a host ID can not be
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* obtained
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*/
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class FallbackNodeProvider implements NodeProviderInterface
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{
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/**
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* @var NodeProviderInterface[]
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*/
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private $nodeProviders;
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/**
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* Constructs a `FallbackNodeProvider` using an array of node providers
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*
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* @param NodeProviderInterface[] $providers Array of node providers
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*/
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public function __construct(array $providers)
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{
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$this->nodeProviders = $providers;
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}
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/**
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* Returns the system node ID by iterating over an array of node providers
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* and returning the first non-empty value found
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*
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* @return string System node ID as a hexadecimal string
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* @throws Exception
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*/
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public function getNode()
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{
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foreach ($this->nodeProviders as $provider) {
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if ($node = $provider->getNode()) {
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return $node;
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}
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}
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return null;
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}
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}
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