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/*
* SPDX-FileCopyrightText: syuilo and misskey-project
* SPDX-License-Identifier: AGPL-3.0-only
*/
/**
* Languages Loader
*/
import * as fs from 'node:fs';
import * as yaml from 'js-yaml';
import { languages, primaries } from './const.js';
import type { Locale } from './autogen/locale.js';
import type { ILocale, ParameterizedString } from './types.js';
type Language = typeof languages[number];
type PrimaryLang = keyof typeof primaries;
type Locales = Record<Language, ILocale>;
/**
* オブジェクトを再帰的にマージする
*/
function merge<T extends ILocale>(...args: (T | ILocale | undefined)[]): T {
return args.reduce<ILocale>((a, c) => ({
...a,
...c,
...Object.entries(a)
.filter(([k]) => c && typeof c[k] === 'object')
.reduce<Record<string, ILocale[string]>>((acc, [k, v]) => {
acc[k] = merge(v as ILocale, (c as ILocale)[k] as ILocale);
return acc;
}, {}),
}), {} as ILocale) as T;
}
/**
* 何故か文字列にバックスペース文字が混入することがあり、YAMLが壊れるので取り除く
*/
function clean (text: string) {
return text.replace(new RegExp(String.fromCodePoint(0x08), 'g'), '');
}
/**
* 空文字列が入ることがあり、フォールバックが動作しなくなるのでプロパティごと消す
*/
function removeEmpty<T extends ILocale>(obj: T): T {
for (const [k, v] of Object.entries(obj)) {
if (v === '') {
delete obj[k];
} else if (typeof v === 'object') {
removeEmpty(v as ILocale);
}
}
return obj;
}
function build(): Record<Language, Locale> {
// vitestの挙動を調整するため、一度ローカル変数化する必要がある
// https://github.com/vitest-dev/vitest/issues/3988#issuecomment-1686599577
// https://github.com/misskey-dev/misskey/pull/14057#issuecomment-2192833785
const metaUrl = import.meta.url;
const locales = languages.reduce<Locales>((a, lang) => {
a[lang] = (yaml.load(clean(fs.readFileSync(new URL(`./locales/${lang}.yml`, metaUrl), 'utf-8'))) ?? {}) as ILocale;
return a;
}, {} as Locales);
removeEmpty(locales);
return Object.entries(locales).reduce<Record<Language, Locale>>((a, [k, v]) => {
const lang = k.split('-')[0];
const key = k as Language;
switch (key) {
case 'ja-JP':
a[key] = v as Locale;
break;
case 'ja-KS':
case 'en-US':
a[key] = merge<Locale>(locales['ja-JP'] as Locale, v);
break;
default: {
const primaryLang = lang as PrimaryLang;
const primaryKey = (lang in primaries ? `${lang}-${primaries[primaryLang]}` : undefined) as Language | undefined;
a[key] = merge<Locale>(
locales['ja-JP'] as Locale,
locales['en-US'],
primaryKey ? locales[primaryKey] : {},
v,
);
break;
}
}
return a;
}, {} as Record<Language, Locale>);
}
const locales = build() as {
[lang: string]: Locale;
};
/**
* フロントエンド用の locale JSON を書き出す
* Service Worker が HTTP 経由で取得するために必要
* @param destDir 出力先ディレクトリ（例: built/_frontend_dist_/locales）
* @param version バージョン文字列（ファイル名とJSON内に埋め込まれる）
*/
async function writeFrontendLocalesJson(destDir: string, version: string): Promise<void> {
const { mkdir, writeFile } = await import('node:fs/promises');
const { resolve } = await import('node:path');
await mkdir(destDir, { recursive: true });
const builtLocales = build();
const v = { '_version_': version };
for (const [lang, locale] of Object.entries(builtLocales)) {
await writeFile(
resolve(destDir, `${lang}.${version}.json`),
JSON.stringify({ ...locale, ...v }),
'utf-8',
);
}
}
export { locales, languages, build, writeFrontendLocalesJson };
export type { Language, Locale, ILocale, ParameterizedString };
export default locales;
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