From 29f7f06ab0f3ff6c7c506566d1535cd4f7da52ee Mon Sep 17 00:00:00 2001
From: Sebastian <sebastian@sebastians.codes>
Date: Sun, 1 Feb 2026 20:47:05 +0100
Subject: [PATCH] alignment

---
 .../Controllers/RegistrationController.cs            | 12 +++---------
 src/Web/lan-frontend/app/register/page.tsx           | 10 +++++-----
 2 files changed, 8 insertions(+), 14 deletions(-)

diff --git a/src/Registration/Registration.API/Controllers/RegistrationController.cs b/src/Registration/Registration.API/Controllers/RegistrationController.cs
index fca730b..1068826 100644
--- a/src/Registration/Registration.API/Controllers/RegistrationController.cs
+++ b/src/Registration/Registration.API/Controllers/RegistrationController.cs
@@ -27,21 +27,15 @@ namespace Registration.API.Controllers
         public async Task<IActionResult> RegisterMember(string ssn)
         {
             var added = await _memberRepository.AddRegistration(ssn);
-            if (added)
-            {
-                return Ok(new { Message = "Member registered successfully." });
-            }
-            else
-            {
-                return Conflict(new { Message = "Member is already registered." });
-            }
+
+            return added ? Ok() : Conflict();
         }
 
         [HttpGet("registered/{ssn}")]
         public async Task<IActionResult> IsMemberRegistered(string ssn)
         {
             var isRegistered = await _memberRepository.GetIsRegistered(ssn);
-            return Ok(new { IsRegistered = isRegistered });
+            return isRegistered ? Conflict() : Ok();
         }
 
         [HttpDelete("clear")]
diff --git a/src/Web/lan-frontend/app/register/page.tsx b/src/Web/lan-frontend/app/register/page.tsx
index bec8f8b..8fdbdf4 100644
--- a/src/Web/lan-frontend/app/register/page.tsx
+++ b/src/Web/lan-frontend/app/register/page.tsx
@@ -47,19 +47,19 @@ export default function RegisterPage() {
 
     try {
       // 1. Check if the SSN has already been registered for the LAN
+      // Returns Ok (200) if NOT registered, Conflict (409) if registered
       const checkRes = await fetch(`/api/Registration/registered/${formData.ssn}`);
-      const checkData = await checkRes.json();
-
-      if (checkData.isRegistered) {
+      
+      if (checkRes.status === 409) {
         setMessage({ type: "error", text: "This SSN is already registered for the LAN." });
         setIsSubmitting(false);
         return;
       }
 
       // 2. Check membership status via GET Registration register
-      // Returns 200 (Ok) if member, 204 (NoContent) if not
+      // Returns 200 (Ok) if member, 404 (NotFound) if not
       const validateRes = await fetch(`/api/Registration/register/${formData.ssn}`);
-      const isMember = validateRes.status === 200;
+      const isMember = validateRes.ok;
 
       // 3. Register the SSN in the membership system via POST
       await fetch(`/api/Registration/register/${formData.ssn}`, {