kokopu
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A JavaScript/TypeScript library implementing the chess game rules and providing tools to read/write the standard chess file formats.
39 lines (36 loc) • 2.16 kB
JavaScript
/*!
* -------------------------------------------------------------------------- *
* *
* Kokopu - A JavaScript/TypeScript chess library. *
* <https://www.npmjs.com/package/kokopu> *
* Copyright (C) 2018-2025 Yoann Le Montagner <yo35 -at- melix.net> *
* *
* Kokopu is free software: you can redistribute it and/or *
* modify it under the terms of the GNU Lesser General Public License *
* as published by the Free Software Foundation, either version 3 of *
* the License, or (at your option) any later version. *
* *
* Kokopu 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 Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General *
* Public License along with this program. If not, see *
* <http://www.gnu.org/licenses/>. *
* *
* -------------------------------------------------------------------------- */
module.exports = function (position, getter) {
let result = '';
for (const castle of position.variant() === 'chess960' ? 'abcdefgh' : 'kq') {
if (getter(position, 'w' + castle)) {
result += castle.toUpperCase();
}
}
for (const castle of position.variant() === 'chess960' ? 'abcdefgh' : 'kq') {
if (getter(position, 'b' + castle)) {
result += castle;
}
}
return result === '' ? '-' : result;
};