cal.pub0.org/apps/web/components/I18nLanguageHandler.tsx

65 lines
2.1 KiB
TypeScript

import { lookup } from "bcp-47-match";
import { useSession } from "next-auth/react";
import { useTranslation } from "next-i18next";
import { useEffect } from "react";
import { CALCOM_VERSION } from "@calcom/lib/constants";
import { trpc } from "@calcom/trpc/react";
function useViewerI18n(locale: string) {
return trpc.viewer.public.i18n.useQuery(
{ locale, CalComVersion: CALCOM_VERSION },
{
/**
* i18n should never be clubbed with other queries, so that it's caching can be managed independently.
**/
trpc: {
context: { skipBatch: true },
},
}
);
}
function useClientLocale(locales: string[]) {
const session = useSession();
// If the user is logged in, use their locale
if (session.data?.user.locale) return session.data.user.locale;
// If the user is not logged in, use the browser locale
if (typeof window !== "undefined") {
// This is the only way I found to ensure the prefetched locale is used on first render
// FIXME: Find a better way to pick the best matching locale from the browser
return lookup(locales, window.navigator.language) || window.navigator.language;
}
// If the browser is not available, use English
return "en";
}
export function useClientViewerI18n(locales: string[]) {
const clientLocale = useClientLocale(locales);
return useViewerI18n(clientLocale);
}
/**
* Auto-switches locale client-side to the logged in user's preference
*/
const I18nLanguageHandler = (props: { locales: string[] }) => {
const { locales } = props;
const { i18n } = useTranslation("common");
const locale = useClientViewerI18n(locales).data?.locale || i18n.language;
useEffect(() => {
// bail early when i18n = {}
if (Object.keys(i18n).length === 0) return;
// if locale is ready and the i18n.language does != locale - changeLanguage
if (locale && i18n.language !== locale) {
i18n.changeLanguage(locale);
}
// set dir="rtl|ltr"
document.dir = i18n.dir();
document.documentElement.setAttribute("lang", locale);
}, [locale, i18n]);
return null;
};
export default I18nLanguageHandler;