EntityPointerLink.php

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<?php
 
declare(strict_types=1);
 
/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */
 
namespace ‪TYPO3\CMS\Core\DataHandling\Model;
 
class ‪EntityPointerLink
{
    protected ‪$subject;
 
    protected ‪$ancestor;
 
    public function ‪__construct(‪EntityPointer ‪$subject)
    {
        $this->subject = ‪$subject;
    }
 
    public function ‪getSubject(): ‪EntityPointer
    {
        return ‪$this->subject;
    }
 
    public function ‪getHead(): ‪EntityPointerLink
    {
        $head = $this;
        while ($head->ancestor !== null) {
            $head = $head->ancestor;
        }
        return $head;
    }
 
    public function ‪getAncestor(): ?‪EntityPointerLink
    {
        return ‪$this->ancestor;
    }
 
    public function ‪withAncestor(‪EntityPointerLink ‪$ancestor): self
    {
        if ($this->ancestor === ‪$ancestor) {
            return $this;
        }
        $target = clone $this;
        $target->ancestor = ‪$ancestor;
        return $target;
    }
}