paricafe/packages/frontend/src/scripts/nyaize.ts

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/*
* SPDX-FileCopyrightText: syuilo and misskey-project
* SPDX-License-Identifier: AGPL-3.0-only
*/
const enRegex1 = /(?<=n)a/gi;
const enRegex2 = /(?<=morn)ing/gi;
const enRegex3 = /(?<=every)one/gi;
const koRegex1 = /[나-낳]/g;
const koRegex2 = /(다$)|(다(?=\.))|(다(?= ))|(다(?=!))|(다(?=\?))/gm;
const koRegex3 = /(야(?=\?))|(야$)|(야(?= ))/gm;
export function nyaize(text: string): string {
return text
// ja-JP
.replaceAll('な', 'にゃ').replaceAll('ナ', 'ニャ').replaceAll('ナ', 'ニャ')
// en-US
.replace(enRegex1, x => x === 'A' ? 'YA' : 'ya')
.replace(enRegex2, x => x === 'ING' ? 'YAN' : 'yan')
.replace(enRegex3, x => x === 'ONE' ? 'NYAN' : 'nyan')
// ko-KR
.replace(koRegex1, match => String.fromCharCode(
match.charCodeAt(0)! + '냐'.charCodeAt(0) - '나'.charCodeAt(0),
))
.replace(koRegex2, '다냥')
.replace(koRegex3, '냥');
}