3 things.

1. Exchange Models and Entities namespace.
2. Fix the bug that input with missing field leads to 500.
3. Write unit tests.

1 files changed, 60 insertions, 0 deletions

diff --git a/Timeline/Models/UserUtility.cs b/Timeline/Models/UserUtility.cs
new file mode 100644
index 00000000..711e321a
--- /dev/null
+++ b/Timeline/Models/UserUtility.cs
@@ -0,0 +1,60 @@
+using System;
+using System.Linq;
+using Timeline.Entities;
+using Timeline.Services;
+
+namespace Timeline.Models
+{
+    public static class UserUtility
+    {
+        public const string UserRole = UserRoles.User;
+        public const string AdminRole = UserRoles.Admin;
+
+        public static string[] UserRoleArray { get; } = new string[] { UserRole };
+        public static string[] AdminRoleArray { get; } = new string[] { UserRole, AdminRole };
+
+        public static string[] IsAdminToRoleArray(bool isAdmin)
+        {
+            return isAdmin ? AdminRoleArray : UserRoleArray;
+        }
+
+        public static bool RoleArrayToIsAdmin(string[] roles)
+        {
+            return roles.Contains(AdminRole);
+        }
+
+        public static string[] RoleStringToRoleArray(string roleString)
+        {
+            return roleString.Split(',').ToArray();
+        }
+
+        public static string RoleArrayToRoleString(string[] roles)
+        {
+            return string.Join(',', roles);
+        }
+
+        public static string IsAdminToRoleString(bool isAdmin)
+        {
+            return RoleArrayToRoleString(IsAdminToRoleArray(isAdmin));
+        }
+
+        public static bool RoleStringToIsAdmin(string roleString)
+        {
+            return RoleArrayToIsAdmin(RoleStringToRoleArray(roleString));
+        }
+
+        public static UserInfo CreateUserInfo(User user)
+        {
+            if (user == null)
+                throw new ArgumentNullException(nameof(user));
+            return new UserInfo(user.Name, RoleStringToIsAdmin(user.RoleString));
+        }
+
+        internal static UserCache CreateUserCache(User user)
+        {
+            if (user == null)
+                throw new ArgumentNullException(nameof(user));
+            return new UserCache { Username = user.Name, Administrator = RoleStringToIsAdmin(user.RoleString), Version = user.Version };
+        }
+    }
+}