Vencord/src/utils/onlyOnce.ts
2023-05-05 16:57:58 +02:00

30 lines
1 KiB
TypeScript

/*
* Vencord, a modification for Discord's desktop app
* Copyright (c) 2023 Vendicated and contributors
*
* 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/>.
*/
export function onlyOnce<F extends Function>(f: F): F {
let called = false;
let result: any;
return function onlyOnceWrapper(this: unknown) {
if (called) return result;
called = true;
return (result = f.apply(this, arguments));
} as unknown as F;
}