Modify RuleType class

src/Services/Marketing/Marketing.API/Model/RuleType.cs

@@ -0,0 +1,51 @@
+namespace Microsoft.eShopOnContainers.Services.Marketing.API.Model
+{
+    using Microsoft.eShopOnContainers.Services.Marketing.API.Infrastructure.Exceptions;
+    using System;
+    using System.Collections.Generic;
+    using System.Linq;
+
+    public sealed class RuleType
+    {
+        public static readonly RuleType UserProfileRule = new RuleType(1, nameof(UserProfileRule));
+        public static readonly RuleType PurchaseHistoryRule = new RuleType(2, nameof(UserProfileRule));
+        public static readonly RuleType UserLocationRule = new RuleType(3, nameof(UserProfileRule));
+
+        public readonly int Id;
+        public readonly string Name;
+
+        private RuleType(int id, string name)
+        {
+            Id = id;
+            Name = name;
+        }
+
+        public static IEnumerable<RuleType> List() =>
+    new[] { UserProfileRule, PurchaseHistoryRule, UserLocationRule };
+
+        public static RuleType FromName(string name)
+        {
+            var state = List()
+                .SingleOrDefault(s => String.Equals(s.Name, name, StringComparison.CurrentCultureIgnoreCase));
+
+            if (state == null)
+            {
+                throw new MarketingDomainException($"Possible values for RuleType: {String.Join(",", List().Select(s => s.Name))}");
+            }
+
+            return state;
+        }
+
+        public static RuleType From(int id)
+        {
+            var state = List().SingleOrDefault(s => s.Id == id);
+
+            if (state == null)
+            {
+                throw new MarketingDomainException($"Possible values for RuleType: {String.Join(",", List().Select(s => s.Name))}");
+            }
+
+            return state;
+        }
+    }
+}

src/Services/Marketing/Marketing.API/Model/RuleTypeEnum.cs

@@ -1,20 +0,0 @@
-namespace Microsoft.eShopOnContainers.Services.Marketing.API.Model
-{
-    using Microsoft.eShopOnContainers.Services.Marketing.API.Infrastructure.Exceptions;
-    using System;
-
-    public enum RuleTypeEnum { UserProfileRule = 1, PurchaseHistoryRule = 2, UserLocationRule = 3 }
-
-    public static class RuleType
-    {
-        public static RuleTypeEnum From(int id)
-        {
-            if (!Enum.IsDefined(typeof(RuleTypeEnum), id))
-            {
-                throw new MarketingDomainException($"Invalid value for RuleType, RuleTypeId: {id}");
-            }
-
-            return (RuleTypeEnum)id;
-        }
-    }
-}