B2B-88: add starter kit structure and elements

lib/server/require-user-in-server-component.ts

@@ -0,0 +1,25 @@
+import 'server-only';
+
+import { cache } from 'react';
+
+import { redirect } from 'next/navigation';
+
+import { requireUser } from '@kit/supabase/require-user';
+import { getSupabaseServerClient } from '@kit/supabase/server-client';
+
+/**
+ * @name requireUserInServerComponent
+ * @description Require the user to be authenticated in a server component.
+ * We reuse this function in multiple server components - it is cached so that the data is only fetched once per request.
+ * Use this instead of `requireUser` in server components, so you don't need to hit the database multiple times in a single request.
+ */
+export const requireUserInServerComponent = cache(async () => {
+  const client = getSupabaseServerClient();
+  const result = await requireUser(client);
+
+  if (result.error) {
+    redirect(result.redirectTo);
+  }
+
+  return result.data;
+});