feat: Move old apps into it's own directory

1 files changed, 52 insertions, 0 deletions

diff --git a/apps/kit/src/hooks/index.server.ts b/apps/kit/src/hooks/index.server.ts
new file mode 100644
index 0000000..414318d
--- /dev/null
+++ b/apps/kit/src/hooks/index.server.ts
@@ -0,0 +1,52 @@
+import { CookieNames } from "$lib/configuration";
+import { detectLocale, locales } from '$lib/i18n/i18n-util'
+import type { Handle, RequestEvent } from '@sveltejs/kit'
+import { sequence } from "@sveltejs/kit/hooks";
+import { initAcceptLanguageHeaderDetector } from 'typesafe-i18n/detectors'
+import { parse, serialize } from "cookie";
+import { logDebug } from "$lib/logger";
+
+const handleLocale: 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;
+
+    logDebug("Handling locale", {
+        locales,
+        localeCookie,
+        preferredLocale,
+        finalLocale
+    });
+
+    if (locales.findIndex((locale) => locale === finalLocale) === -1) 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"
+            })
+        });
+    }
+    // replace html lang attribute with correct language
+    return resolve(event, { transformPageChunk: ({ html }) => html.replace('%lang%', finalLocale) });
+}
+
+function getPreferredLocale(event: RequestEvent) {
+    // detect the preferred language the user has configured in it's browser
+    // https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Accept-Language
+    const headers = transformHeaders(event)
+    const acceptLanguageDetector = initAcceptLanguageHeaderDetector({ headers })
+
+    return detectLocale(acceptLanguageDetector)
+}
+
+function transformHeaders({ request }: RequestEvent) {
+    const headers: Record<string, string> = {}
+    request.headers.forEach((value, key) => (headers[key] = value))
+    return headers
+}
+
+export const handle = sequence(handleLocale);