Sharkey/packages/backend/src/misc/generate-invite-code.ts
Shun Sakai c2370a1be6
chore: 著作権とライセンスについての情報を各ファイルに追加する (#11348)
* chore: Add the SPDX information to each file

Add copyright and licensing information as defined in version 3.0 of
the REUSE Specification.

* tweak format

---------

Co-authored-by: syuilo <Syuilotan@yahoo.co.jp>
2023-07-27 14:31:52 +09:00

25 lines
599 B
TypeScript

/*
* SPDX-FileCopyrightText: syuilo and other misskey contributors
* SPDX-License-Identifier: AGPL-3.0-only
*/
import { secureRndstr } from './secure-rndstr.js';
const CHARS = '23456789ABCDEFGHJKLMNPQRSTUVWXYZ'; // [0-9A-Z] w/o [01IO] (32 patterns)
export function generateInviteCode(): string {
const code = secureRndstr(8, {
chars: CHARS,
});
const uniqueId = [];
let n = Math.floor(Date.now() / 1000 / 60);
while (true) {
uniqueId.push(CHARS[n % CHARS.length]);
const t = Math.floor(n / CHARS.length);
if (!t) break;
n = t;
}
return code + uniqueId.reverse().join('');
}