<?php
declare(strict_types=1);

namespace Esun\FileManager\Model\Config\Backend;

use Magento\Framework\App\Config\Value;
use Magento\Framework\Exception\LocalizedException;

class UploadPath extends Value
{
    /**
     * @throws LocalizedException
     */
    public function beforeSave(): self
    {
        $path = trim(str_replace('\\', '/', (string) $this->getValue()), '/');
        if (!preg_match('#^uploads(?:/[a-zA-Z0-9_-]+)*$#', $path)) {
            throw new LocalizedException(
                __('Upload Path must be "uploads" or a safe child directory of "uploads".')
            );
        }
        $this->setValue($path);

        return parent::beforeSave();
    }
}