131 lines
3.7 KiB
TypeScript
131 lines
3.7 KiB
TypeScript
/*
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* SPDX-FileCopyrightText: syuilo and misskey-project
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* SPDX-License-Identifier: AGPL-3.0-only
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*/
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/**
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* Languages Loader
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*/
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import * as fs from 'node:fs';
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import * as yaml from 'js-yaml';
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import { languages, primaries } from './const.js';
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import type { Locale } from './autogen/locale.js';
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import type { ILocale, ParameterizedString } from './types.js';
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type Language = typeof languages[number];
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type PrimaryLang = keyof typeof primaries;
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type Locales = Record<Language, ILocale>;
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/**
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* オブジェクトを再帰的にマージする
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*/
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function merge<T extends ILocale>(...args: (T | ILocale | undefined)[]): T {
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return args.reduce<ILocale>((a, c) => ({
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...a,
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...c,
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...Object.entries(a)
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.filter(([k]) => c && typeof c[k] === 'object')
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.reduce<Record<string, ILocale[string]>>((acc, [k, v]) => {
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acc[k] = merge(v as ILocale, (c as ILocale)[k] as ILocale);
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return acc;
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}, {}),
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}), {} as ILocale) as T;
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}
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/**
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* 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
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*/
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function clean (text: string) {
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return text.replace(new RegExp(String.fromCodePoint(0x08), 'g'), '');
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}
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/**
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* 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
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*/
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function removeEmpty<T extends ILocale>(obj: T): T {
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for (const [k, v] of Object.entries(obj)) {
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if (v === '') {
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delete obj[k];
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} else if (typeof v === 'object') {
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removeEmpty(v as ILocale);
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}
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}
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return obj;
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}
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function build(): Record<Language, Locale> {
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// 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
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// https://github.com/vitest-dev/vitest/issues/3988#issuecomment-1686599577
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// https://github.com/misskey-dev/misskey/pull/14057#issuecomment-2192833785
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const metaUrl = import.meta.url;
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const locales = languages.reduce<Locales>((a, lang) => {
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a[lang] = (yaml.load(clean(fs.readFileSync(new URL(`./locales/${lang}.yml`, metaUrl), 'utf-8'))) ?? {}) as ILocale;
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return a;
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}, {} as Locales);
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removeEmpty(locales);
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return Object.entries(locales).reduce<Record<Language, Locale>>((a, [k, v]) => {
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const lang = k.split('-')[0];
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const key = k as Language;
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switch (key) {
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case 'ja-JP':
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a[key] = v as Locale;
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break;
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case 'ja-KS':
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case 'en-US':
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a[key] = merge<Locale>(locales['ja-JP'] as Locale, v);
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break;
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default: {
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const primaryLang = lang as PrimaryLang;
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const primaryKey = (lang in primaries ? `${lang}-${primaries[primaryLang]}` : undefined) as Language | undefined;
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a[key] = merge<Locale>(
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locales['ja-JP'] as Locale,
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locales['en-US'],
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primaryKey ? locales[primaryKey] : {},
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v,
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);
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break;
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}
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}
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return a;
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}, {} as Record<Language, Locale>);
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}
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const locales = build() as {
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[lang: string]: Locale;
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};
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/**
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* フロントエンド用の locale JSON を書き出す
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* Service Worker が HTTP 経由で取得するために必要
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* @param destDir 出力先ディレクトリ（例: built/_frontend_dist_/locales）
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* @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）
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*/
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async function writeFrontendLocalesJson(destDir: string, version: string): Promise<void> {
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const { mkdir, writeFile } = await import('node:fs/promises');
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const { resolve } = await import('node:path');
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await mkdir(destDir, { recursive: true });
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const builtLocales = build();
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const v = { '_version_': version };
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for (const [lang, locale] of Object.entries(builtLocales)) {
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await writeFile(
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resolve(destDir, `${lang}.${version}.json`),
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JSON.stringify({ ...locale, ...v }),
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'utf-8',
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);
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}
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}
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export { locales, languages, build, writeFrontendLocalesJson };
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export type { Language, Locale, ILocale, ParameterizedString };
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export default locales;
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