refactor

packages/misskey-js/src/index.ts

@@ -22,7 +22,8 @@ import * as api from './api.js';
 import * as entities from './entities.js';
 import * as acct from './acct.js';
 import * as note from './note.js';
-export { api, entities, acct, note };
+import { nyaize } from './nyaize.js';
+export { api, entities, acct, note, nyaize };
 
 //#region standalone types
 import type { Endpoints } from './api.types.js';

packages/misskey-js/src/nyaize.ts

@@ -0,0 +1,27 @@
+/*
+ * 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');
+}