40 lines
1.4 KiB
TypeScript
40 lines
1.4 KiB
TypeScript
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import en from './en.json'
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import fr from './fr.json'
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import nl from './nl.json'
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import { defaultLocale, locales, type Locale } from './locales'
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export { locales, defaultLocale, localeNames, localeFlags, type Locale } from './locales'
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type Dict = typeof en
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// fr/nl are type-checked against the English shape: a missing key is a
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// build error, not a silent English fallback.
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const dicts: Record<Locale, Dict> = { en, fr, nl }
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function lookup(dict: Dict, path: string): unknown {
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return path.split('.').reduce<unknown>((node, key) => {
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if (node && typeof node === 'object' && key in node) {
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return (node as Record<string, unknown>)[key]
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}
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return undefined
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}, dict)
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}
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/** Returns the UI string for `path` in `locale`, falling back to English. */
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export function useT(locale: Locale) {
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return (path: string): string => {
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const hit = lookup(dicts[locale], path) ?? lookup(dicts[defaultLocale], path)
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if (typeof hit !== 'string') {
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throw new Error(`Missing i18n key "${path}" (locale: ${locale})`)
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}
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return hit
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}
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}
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/** Path prefix for a locale: '' for the default locale (served at /). */
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export function localePath(locale: Locale): string {
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return locale === defaultLocale ? '' : `/${locale}`
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}
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/** The non-default locales, e.g. for getStaticPaths of the [lang] route. */
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export const translatedLocales = locales.filter((l) => l !== defaultLocale)
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