categorie fix

Webshop.Application/ServiceResult.cs

@@ -0,0 +1,44 @@
+// src/Webshop.Application/ServiceResult.cs
+namespace Webshop.Application
+{
+    public enum ServiceResultType
+    {
+        Success,
+        NotFound,
+        InvalidInput,
+        Conflict,
+        Failure
+    }
+
+    public class ServiceResult
+    {
+        public ServiceResultType Type { get; }
+        public string? ErrorMessage { get; }
+
+        protected ServiceResult(ServiceResultType type, string? errorMessage = null)
+        {
+            Type = type;
+            ErrorMessage = errorMessage;
+        }
+
+        public static ServiceResult Ok() => new ServiceResult(ServiceResultType.Success);
+        public static ServiceResult<T> Ok<T>(T value) => new ServiceResult<T>(value, ServiceResultType.Success);
+
+        // Allgemeine Fail-Methode
+        public static ServiceResult Fail(ServiceResultType type, string errorMessage) => new ServiceResult(type, errorMessage);
+
+        // Generische Fail-Methode
+        public static ServiceResult<T> Fail<T>(ServiceResultType type, string errorMessage) => new ServiceResult<T>(default, type, errorMessage);
+    }
+
+    public class ServiceResult<T> : ServiceResult
+    {
+        public T? Value { get; }
+
+        protected internal ServiceResult(T? value, ServiceResultType type, string? errorMessage = null)
+            : base(type, errorMessage)
+        {
+            Value = value;
+        }
+    }
+}