<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
namespace Magento\Framework\Config\Dom;

/**
* Configuration of identifier attributes to be taken into account during merging
*/
class NodeMergingConfig
{
/**
* @var NodePathMatcher
*/
private $nodePathMatcher;

/**
* Format: array('/node/path' => '<node_id_attribute>', ...)
*
* @var array
*/
private $idAttributes = [];

/**
* @param NodePathMatcher $nodePathMatcher
* @param array $idAttributes
*/
public function __construct(NodePathMatcher $nodePathMatcher, array $idAttributes)
{
$this->nodePathMatcher = $nodePathMatcher;
$this->idAttributes = $idAttributes;
}

/**
* Retrieve name of an identifier attribute for a node
*
* @param string $nodeXpath
* @return string|null
*/
public function getIdAttribute($nodeXpath)
{
foreach ($this->idAttributes as $pathPattern => $idAttribute) {
if ($this->nodePathMatcher->match($pathPattern, $nodeXpath)) {
return $idAttribute;
}
}
return null;
}
}