Feature #42: Active Directory Interop Upgrade

AD Interop moved to Disco.Services; Supports multi-domain environments,
sites, and searching restricted with OUs.

Disco.Services/Users/UserExtensions.cs

@@ -0,0 +1,42 @@
+using Disco.Models.Repository;
+using Disco.Services.Interop.ActiveDirectory;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Disco.Services
+{
+    public static class UserExtensions
+    {
+        public static bool IsInPrimaryDomain(this User u)
+        {
+            return u.Domain.Equals(Disco.Services.Interop.ActiveDirectory.ActiveDirectory.PrimaryDomain.NetBiosName, StringComparison.InvariantCultureIgnoreCase);
+        }
+
+        public static string FriendlyId(this User u)
+        {
+            return FriendlyUserId(u.UserId);
+        }
+
+        public static string FriendlyUserId(string UserId)
+        {
+            var splitUserId = SplitUserId(UserId);
+            
+            if (splitUserId.Item1 != null && splitUserId.Item1.Equals(ActiveDirectory.PrimaryDomain.NetBiosName, StringComparison.InvariantCultureIgnoreCase))
+                return splitUserId.Item2;
+            else
+                return UserId;
+        }
+
+        public static Tuple<string, string> SplitUserId(string UserId)
+        {
+            var slashIndex = UserId.IndexOf('\\');
+            if (slashIndex < 0)
+                return Tuple.Create<string, string>(null, UserId);
+            else
+                return Tuple.Create(UserId.Substring(0, slashIndex), UserId.Substring(slashIndex + 1));
+        }
+    }
+}