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merge: avoid look-behind in nyaize - fixes 419 (!433)

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View MR for information: https://activitypub.software/TransFem-org/Sharkey/-/merge_requests/433

Approved-by: Julia Johannesen <julia@insertdomain.name>
Approved-by: Amelia Yukii <amelia.yukii@shourai.de>
This commit is contained in:
Amelia Yukii 2024-02-20 20:00:22 +00:00
commit ff8cfeb05c
2 changed files with 43 additions and 6 deletions
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17
packages/frontend/src/scripts/nyaize.ts
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@ -3,21 +3,26 @@
* 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;
function ifAfter(prefix, fn) {
const preLen = prefix.length;
const regex = new RegExp(prefix,'i');
return (x,pos,string) => {
return pos > 0 && string.substring(pos-preLen,pos).match(regex) ? fn(x) : x;
};
}
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')
.replace(/a/gi, ifAfter('n', x => x === 'A' ? 'YA' : 'ya'))
.replace(/ing/gi, ifAfter('morn', x => x === 'ING' ? 'YAN' : 'yan'))
.replace(/one/gi, ifAfter('every', x => x === 'ONE' ? 'NYAN' : 'nyan'))
// ko-KR
.replace(koRegex1, match => String.fromCharCode(
match.charCodeAt(0)! + '냐'.charCodeAt(0) - '나'.charCodeAt(0),