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avoid look-behind in nyaize - fixes 419
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2 changed files with 43 additions and 6 deletions
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@ -3,21 +3,26 @@
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* SPDX-License-Identifier: AGPL-3.0-only
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*/
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const enRegex1 = /(?<=n)a/gi;
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const enRegex2 = /(?<=morn)ing/gi;
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const enRegex3 = /(?<=every)one/gi;
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const koRegex1 = /[나-낳]/g;
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const koRegex2 = /(다$)|(다(?=\.))|(다(?= ))|(다(?=!))|(다(?=\?))/gm;
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const koRegex3 = /(야(?=\?))|(야$)|(야(?= ))/gm;
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function ifAfter(prefix, fn) {
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const preLen = prefix.length;
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const regex = new RegExp(prefix,'i');
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return (x,pos,string) => {
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return pos > 0 && string.substring(pos-preLen,pos).match(regex) ? fn(x) : x;
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};
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}
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export function nyaize(text: string): string {
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return text
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// ja-JP
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.replaceAll('な', 'にゃ').replaceAll('ナ', 'ニャ').replaceAll('ナ', 'ニャ')
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// en-US
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.replace(enRegex1, x => x === 'A' ? 'YA' : 'ya')
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.replace(enRegex2, x => x === 'ING' ? 'YAN' : 'yan')
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.replace(enRegex3, x => x === 'ONE' ? 'NYAN' : 'nyan')
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.replace(/a/gi, ifAfter('n', x => x === 'A' ? 'YA' : 'ya'))
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.replace(/ing/gi, ifAfter('morn', x => x === 'ING' ? 'YAN' : 'yan'))
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.replace(/one/gi, ifAfter('every', x => x === 'ONE' ? 'NYAN' : 'nyan'))
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// ko-KR
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.replace(koRegex1, match => String.fromCharCode(
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match.charCodeAt(0)! + '냐'.charCodeAt(0) - '나'.charCodeAt(0),
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32
packages/frontend/test/nyaize.test.ts
Normal file
32
packages/frontend/test/nyaize.test.ts
Normal file
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@ -0,0 +1,32 @@
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import { describe, test, assert, afterEach } from 'vitest';
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import { nyaize } from '@/scripts/nyaize.js';
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function runTests(cases) {
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for (const c of cases) {
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const [input,expected] = c;
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const got = nyaize(input);
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assert.strictEqual(got, expected);
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}
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}
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describe('nyaize', () => {
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test('ja-JP', () => {
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runTests([
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['きれいな','きれいにゃ'],
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['ナナナ', 'ニャニャニャ'],
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['ナナ','ニャニャ'],
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]);
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});
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test('en-US', () => {
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runTests([
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['bar','bar'],
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['banana','banyanya'],
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['booting','booting'],
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['morning','mornyan'],
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['mmmorning','mmmornyan'],
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['someone','someone'],
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['everyone','everynyan'],
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['foreveryone','foreverynyan'],
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]);
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});
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});
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