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import { CookieNames } from "$lib/configuration";
import { detectLocale, i18n, isLocale, locales } from '$lib/i18n/i18n-util'
import type { Handle, RequestEvent } from '@sveltejs/kit'
import { initAcceptLanguageHeaderDetector } from 'typesafe-i18n/detectors'
import { parse, serialize } from "cookie";
import type { Locales } from "$lib/i18n/i18n-types";
import { loadAllLocales } from "$lib/i18n/i18n-util.sync";
loadAllLocales()
const L = i18n()
export const handle: Handle = async ({ event, resolve }) => {
const cookies = parse(event.request.headers.get("Cookie") ?? '');
const localeCookie = cookies[CookieNames.locale];
const preferredLocale = getPreferredLocale(event);
let finalLocale = localeCookie ?? preferredLocale;
console.log("Handling locale", {
locales,
localeCookie,
preferredLocale,
finalLocale
});
if (!isLocale(finalLocale)) finalLocale = "en";
if (!localeCookie) {
// Set a locale cookie
event.setHeaders({
"Set-Cookie": serialize(CookieNames.locale, finalLocale, {
path: "/",
expires: new Date(2099, 1, 1, 0, 0, 0, 0),
sameSite: "strict"
})
});
}
event.locals.locale = finalLocale as Locales;
event.locals.LL = L[finalLocale as Locales];
return resolve(event, { transformPageChunk: ({ html }) => html.replace('%lang%', finalLocale) });
}
function getPreferredLocale(event: RequestEvent) {
const acceptLanguageDetector = initAcceptLanguageHeaderDetector(event.request);
return detectLocale(acceptLanguageDetector);
}
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