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

class Converter implements \Magento\Framework\Config\ConverterInterface
{
/**
* Convert dom node tree to array
*
* @param \DOMDocument $source
* @return array
*/
public function convert($source)
{
$fieldsets = [];
$xpath = new \DOMXPath($source);
/** @var \DOMNode $fieldset */
foreach ($xpath->query('/config/scope') as $scope) {
$scopeId = $scope->attributes->getNamedItem('id')->nodeValue;
$fieldsets[$scopeId] = $this->_convertScope($scope);
}
return $fieldsets;
}

/**
* Convert Scope node to Magento array
*
* @param \DOMNode $scope
* @return array
*/
protected function _convertScope($scope)
{
$result = [];
foreach ($scope->childNodes as $fieldset) {
if (!$fieldset instanceof \DOMElement) {
continue;
}
$fieldsetName = $fieldset->attributes->getNamedItem('id')->nodeValue;
$result[$fieldsetName] = $this->_convertFieldset($fieldset);
}
return $result;
}

/**
* Convert Fieldset node to Magento array
*
* @param \DOMNode $fieldset
* @return array
*/
protected function _convertFieldset($fieldset)
{
$result = [];
foreach ($fieldset->childNodes as $field) {
if (!$field instanceof \DOMElement) {
continue;
}
$fieldName = $field->attributes->getNamedItem('name')->nodeValue;
$result[$fieldName] = $this->_convertField($field);
}
return $result;
}

/**
* Convert Field node to Magento array
*
* @param \DOMNode $field
* @return array
*/
protected function _convertField($field)
{
$result = [];
foreach ($field->childNodes as $aspect) {
if (!$aspect instanceof \DOMElement) {
continue;
}
/** @var \DOMNamedNodeMap $aspectAttributes */
$aspectAttributes = $aspect->attributes;
$aspectName = $aspectAttributes->getNamedItem('name')->nodeValue;
$targetField = $aspectAttributes->getNamedItem('targetField');
$result[$aspectName] = $targetField === null ? '*' : $targetField->nodeValue;
}
return $result;
}
}