From 8dd3285cbba5638065bc171caba799d689cb4af0 Mon Sep 17 00:00:00 2001
From: Tobias Herbert <tobias-manfred.herbert@informatik.hs-fulda.de>
Date: Wed, 7 Feb 2024 10:38:04 +0100
Subject: [PATCH] Added exception handling for registerUser Method

---
 src/main/java/org/example/Administration.java | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/src/main/java/org/example/Administration.java b/src/main/java/org/example/Administration.java
index a27384c..14b2ae9 100644
--- a/src/main/java/org/example/Administration.java
+++ b/src/main/java/org/example/Administration.java
@@ -185,8 +185,23 @@ public class Administration {
             }
             else if(findProfessorById(UserId) == null || findAdminById(UserId) == null || findStudentById(UserId) == null)
             {
-                System.out.println("The Id has not been used already!");
-                correctData = true;
+                String substring = UserId.substring(1);
+
+                if(!rightPrefix(UserId, userType))
+                {
+                    correctData = false;
+                }
+                else if(!isNumber(substring))
+                {
+                    System.out.println("Every character besides the first one need to be digits");
+                    correctData = false;
+
+                }
+                else{
+                    System.out.println("The Id has not been used already!");
+                    correctData = true;
+                }
+
             }
 
             switch (userType)