Move logged-in redirect from proxy to login page

app/(auth)/login/page.tsx

@@ -1,4 +1,7 @@
+import { Suspense } from "react";
 import type { Metadata } from "next";
+
+import { redirectIfLoggedIn } from "@/data/auth";
 import { LoginForm } from "./_components/login-form";
 
 export const metadata: Metadata = {
@@ -9,8 +12,15 @@ export default function LoginPage() {
   return (
     <main className="flex flex-1 items-center justify-center p-4">
       <div className="w-full max-w-sm">
-        <LoginForm />
+        <Suspense fallback={null}>
+          <LoginContent />
+        </Suspense>
       </div>
     </main>
   );
 }
+
+async function LoginContent() {
+  await redirectIfLoggedIn();
+  return <LoginForm />;
+}

data/auth.ts

@@ -19,3 +19,10 @@ export async function getCurrentUser(): Promise<CurrentUser> {
     username: session.user.username ?? null,
   };
 }
+
+// Dipakai halaman login: session divalidasi (bukan cuma cek cookie) supaya
+// cookie kedaluwarsa tidak memicu redirect bolak-balik dengan getCurrentUser().
+export async function redirectIfLoggedIn(): Promise<void> {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (session) redirect("/");
+}

proxy.ts

@@ -1,17 +1,9 @@
 import { NextResponse, type NextRequest } from "next/server";
 import { getSessionCookie } from "better-auth/cookies";
-import { redirect } from "next/dist/server/api-utils";
 
 export function proxy(request: NextRequest) {
-  const isLoggedIn = !!getSessionCookie(request)
-
-  // if already logged in and accessing /login redirect to /
-  if (isLoggedIn && request.nextUrl.pathname === "/login") {
-    return NextResponse.redirect(new URL("/", request.url));
-  }
-
-  // If not logged in, redirect to /login
-  if (!isLoggedIn && request.nextUrl.pathname !== "/login") {
+  // Only checks that the cookie exists; getCurrentUser() still validates it.
+  if (!getSessionCookie(request)) {
     return NextResponse.redirect(new URL("/login", request.url));
   }
 
@@ -19,5 +11,5 @@ export function proxy(request: NextRequest) {
 }
 
 export const config = {
-  matcher: ["/((?!api|_next/static|_next/image|.*\\..*).*)"],
+  matcher: ["/((?!api|login|_next/static|_next/image|.*\\..*).*)"],
 };