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<?php

/**
 * webtrees: online genealogy
 * Copyright (C) 2023 webtrees development team
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <https://www.gnu.org/licenses/>.
 */

declare(strict_types=1);

namespace Fisharebest\Webtrees\Elements;

use Fisharebest\Webtrees\Tree;
use Fisharebest\Webtrees\Webtrees;

/**
 * ANCESTRAL_FILE_NUMBER := {Size=1:20}
 * A system identification name which was obtained through the GEDCOM
 * registration process. This name must be unique from any other product.
 * Spaces within the name must be substituted with a 0x5F (underscore _)
 * so as to create one word.
 */
class ApprovedSystemId extends AbstractElement
{
    protected const MAXIMUM_LENGTH = 20;

    /**
     * Create a default value for this element.
     *
     * @param Tree $tree
     *
     * @return string
     */
    public function default(Tree $tree): string
    {
        return Webtrees::NAME;
    }
}