61 lines
1.4 KiB
TypeScript
61 lines
1.4 KiB
TypeScript
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import isNodeJs from 'detect-node'
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import en from './en'
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import es from './es'
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import it from './it'
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import zh from './zh'
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export interface LOCALE {
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'PROCESSING' (): string;
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'BTN_ERROR' (): string;
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'DEPRECATION_NOTICE' (btnName: string): string;
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'DOWNLOAD' (fileType: string): string;
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'DOWNLOAD_AUDIO' (fileType: string): string;
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'IND_PARTS' (): string;
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'IND_PARTS_TOOLTIP' (): string;
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'VIEW_IN_LIBRESCORE' (): string;
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'FULL_SCORE' (): string;
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}
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const locales = (<L extends { [n: string]: LOCALE } /** type checking */> (l: L) => Object.freeze(l))({
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en,
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es,
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it,
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zh,
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})
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// detect browser language
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const lang = (() => {
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let userLangs: readonly string[]
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if (!isNodeJs) {
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userLangs = navigator.languages
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} else {
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const env = process.env
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const l = env.LC_ALL || env.LC_MESSAGES || env.LANG || env.LANGUAGE || ''
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userLangs = [l.slice(0, 2)]
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}
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const names = Object.keys(locales)
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const _lang = userLangs.find(l => {
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// find the first occurrence of valid languages
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return names.includes(l)
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})
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return _lang || 'en'
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})()
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export type STR_KEYS = keyof LOCALE
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export type ALL_LOCALES = typeof locales
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export type LANGS = keyof ALL_LOCALES
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// eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
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export default function i18n<K extends STR_KEYS, L extends LANGS = 'en'> (key: K) {
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const locale = locales[lang] as ALL_LOCALES[L]
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return locale[key]
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}
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