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<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
namespace Magento\Framework\View\Asset\PreProcessor\Helper;
/**
* Class Sort
*/
class Sort implements SortInterface
{
/**
* Name of directive
*/
const DIRECTIVE = 'after';
/**
* Key of name items
*/
const NEXT_KEY = 'next';
/**
* @var array
*/
private $result;
/**
* @var array
*/
private $array;
/**
* @inheritdoc
*/
public function sort(array $array)
{
$this->result = [];
$this->array = $array;
$nodes = [];
$structure = [];
foreach ($this->array as $name => $item) {
$nodes[$name] = isset($nodes[$name]) ? $nodes[$name] : [self::NEXT_KEY => null];
if (isset($item[self::DIRECTIVE])) {
$nodes[$item[self::DIRECTIVE]][self::NEXT_KEY][$name] = &$nodes[$name];
continue;
}
$structure[$name] = &$nodes[$name];
}
$this->fillResult($structure);
return $this->result;
}
/**
* @param array $structure
* @return void
*/
private function fillResult(array $structure)
{
foreach ($structure as $name => $item) {
$this->result[$name] = $this->array[$name];
if (!empty($item[self::NEXT_KEY])) {
$this->fillResult($item[self::NEXT_KEY]);
}
}
}
}