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.
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text/typescript
/*!
* -------------------------------------------------------------------------- *
* *
* 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/>. *
* *
* -------------------------------------------------------------------------- */
/**
* Trim the given string, and replace all the sub-sequence of 1 or several space-like characters by a single space.
*/
export function trimAndCollapseSpaces(text: string) {
return text.replace(/^\s+|\s+$/g, '').replace(/\s+/g, ' ');
}
/**
* Whether the given value is a valid NAG or not.
*/
export function isValidNag(nag: unknown) {
return Number.isInteger(nag) && (nag as number) >= 0;
}
/**
* Whether the given value is a valid NAG or not.
*/
export function isValidElo(elo: unknown) {
return Number.isInteger(elo) && (elo as number) >= 0;
}
/**
* Whether the given value is a valid round (or sub-round, or sub-sub-round...) or not.
*/
export function isValidRound(round: unknown) {
return Number.isInteger(round) && (round as number) >= 0;
}