Aktueller Stand

app/api/settings/registration/route.ts

@@ -0,0 +1,10 @@
+import { NextResponse } from "next/server";
+import { prisma } from "../../../../lib/prisma";
+
+export async function GET() {
+  const setting = await prisma.setting.findUnique({
+    where: { key: "registration_enabled" }
+  });
+  const registrationEnabled = setting?.value !== "false";
+  return NextResponse.json({ registrationEnabled });
+}

app/login/page.tsx

@@ -3,12 +3,29 @@
 import { signIn } from "next-auth/react";
 import Link from "next/link";
 import { useRouter } from "next/navigation";
-import { useState } from "react";
+import { useEffect, useState } from "react";
 
 export default function LoginPage() {
   const router = useRouter();
   const [error, setError] = useState<string | null>(null);
   const [showVerifyLink, setShowVerifyLink] = useState(false);
+  const [registrationEnabled, setRegistrationEnabled] = useState<boolean | null>(
+    null
+  );
+
+  useEffect(() => {
+    const loadRegistration = async () => {
+      try {
+        const response = await fetch("/api/settings/registration");
+        if (!response.ok) return;
+        const payload = await response.json();
+        setRegistrationEnabled(payload.registrationEnabled !== false);
+      } catch {
+        setRegistrationEnabled(true);
+      }
+    };
+    loadRegistration();
+  }, []);
 
   const onSubmit = async (event: React.FormEvent<HTMLFormElement>) => {
     event.preventDefault();
@@ -78,9 +95,14 @@ export default function LoginPage() {
         </button>
       </form>
       {error && <p className="mt-3 text-sm text-red-600">{error}</p>}
+      {registrationEnabled !== false && (
         <p className="mt-4 text-sm text-slate-600">
-        Kein Konto? <Link href="/register" className="text-brand-700">Registrieren</Link>
+          Kein Konto?{" "}
+          <Link href="/register" className="text-brand-700">
+            Registrieren
+          </Link>
         </p>
+      )}
       <p className="mt-2 text-sm text-slate-600">
         Passwort vergessen?{" "}
         <Link href="/reset" className="text-brand-700">

app/register/page.tsx

@@ -2,11 +2,28 @@
 
 import Link from "next/link";
 import { signIn } from "next-auth/react";
-import { useState } from "react";
+import { useEffect, useState } from "react";
 
 export default function RegisterPage() {
   const [error, setError] = useState<string | null>(null);
   const [done, setDone] = useState(false);
+  const [registrationEnabled, setRegistrationEnabled] = useState<boolean | null>(
+    null
+  );
+
+  useEffect(() => {
+    const loadRegistration = async () => {
+      try {
+        const response = await fetch("/api/settings/registration");
+        if (!response.ok) return;
+        const payload = await response.json();
+        setRegistrationEnabled(payload.registrationEnabled !== false);
+      } catch {
+        setRegistrationEnabled(true);
+      }
+    };
+    loadRegistration();
+  }, []);
 
   const onSubmit = async (event: React.FormEvent<HTMLFormElement>) => {
     event.preventDefault();
@@ -45,6 +62,16 @@ export default function RegisterPage() {
       <p className="mt-1 text-sm text-slate-600">
         Erstelle ein Konto, um Termine vorzuschlagen und eigene Ansichten anzulegen.
       </p>
+      {registrationEnabled === false ? (
+        <div className="mt-4 rounded-xl border border-slate-200 bg-slate-50 px-4 py-3 text-sm text-slate-700">
+          Registrierung ist derzeit deaktiviert.
+        </div>
+      ) : registrationEnabled === null ? (
+        <p className="mt-4 text-sm text-slate-600">
+          Registrierung wird geladen...
+        </p>
+      ) : (
+        <>
           <form onSubmit={onSubmit} className="mt-4 space-y-3">
             <input
               name="name"
@@ -70,8 +97,12 @@ export default function RegisterPage() {
               Konto anlegen
             </button>
           </form>
-      {done && <p className="mt-3 text-sm text-emerald-600">Account erstellt.</p>}
+          {done && (
+            <p className="mt-3 text-sm text-emerald-600">Account erstellt.</p>
+          )}
           {error && <p className="mt-3 text-sm text-red-600">{error}</p>}
+        </>
+      )}
       <p className="mt-4 text-sm text-slate-600">
         Schon registriert? <Link href="/login" className="text-brand-700">Login</Link>
       </p>