48 lines
2.0 KiB
TypeScript
48 lines
2.0 KiB
TypeScript
import { cookies } from "next/headers";
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import { getRequestConfig } from "next-intl/server";
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// i18n WITHOUT routing: the locale is chosen by a `NEXT_LOCALE` cookie (set by
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// the language switcher) rather than a URL segment, so every existing route and
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// the access-guard middleware keep working unchanged. English is the fallback.
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export const SUPPORTED_LOCALES = ["en", "it", "nl", "de", "fr", "es", "pt", "pl", "sv", "tr"] as const;
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export type AppLocale = (typeof SUPPORTED_LOCALES)[number];
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export const DEFAULT_LOCALE: AppLocale = "en";
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export function isSupportedLocale(value: string | undefined): value is AppLocale {
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return !!value && (SUPPORTED_LOCALES as readonly string[]).includes(value);
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}
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export default getRequestConfig(async () => {
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const store = await cookies();
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const cookieLocale = store.get("NEXT_LOCALE")?.value;
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const locale: AppLocale = isSupportedLocale(cookieLocale) ? cookieLocale : DEFAULT_LOCALE;
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// Safe: `locale` is validated against SUPPORTED_LOCALES above (only en/it/nl/de/fr/es).
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const messages = (await import(`../messages/${locale}.json`)).default;
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// English is the source of truth; fall back to it for any key missing from a
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// translation so the UI never shows a raw key path.
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const fallback =
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locale === DEFAULT_LOCALE ? messages : (await import(`../messages/${DEFAULT_LOCALE}.json`)).default;
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return {
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locale,
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messages,
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// Never throw on a missing message — use the English value, or a humanised
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// key as a last resort.
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getMessageFallback({ key }: { key: string }) {
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const fromEnglish = key
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.split(".")
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.reduce<unknown>(
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(o, k) => (o && typeof o === "object" ? (o as Record<string, unknown>)[k] : undefined),
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fallback,
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);
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if (typeof fromEnglish === "string") return fromEnglish;
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const seg = key.split(".").pop() ?? key;
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return seg.replace(/[._-]/g, " ").replace(/\b\w/g, (c) => c.toUpperCase());
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},
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onError() {
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// Swallow MISSING_MESSAGE etc. — getMessageFallback already degrades.
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},
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};
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});
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