1 files changed, 40 insertions, 0 deletions
diff --git a/BackEnd/Timeline/Controllers/ControllerAuthExtensions.cs b/BackEnd/Timeline/Controllers/ControllerAuthExtensions.cs
new file mode 100644
index 00000000..00a65454
--- /dev/null
+++ b/BackEnd/Timeline/Controllers/ControllerAuthExtensions.cs
@@ -0,0 +1,40 @@
+using Microsoft.AspNetCore.Mvc;
+using System;
+using System.Security.Claims;
+using Timeline.Auth;
+using static Timeline.Resources.Controllers.ControllerAuthExtensions;
+
+namespace Timeline.Controllers
+{
+    public static class ControllerAuthExtensions
+    {
+        public static bool IsAdministrator(this ControllerBase controller)
+        {
+            return controller.User != null && controller.User.IsAdministrator();
+        }
+
+        public static long GetUserId(this ControllerBase controller)
+        {
+            var claim = controller.User.FindFirst(ClaimTypes.NameIdentifier);
+            if (claim == null)
+                throw new InvalidOperationException(ExceptionNoUserIdentifierClaim);
+
+            if (long.TryParse(claim.Value, out var value))
+                return value;
+
+            throw new InvalidOperationException(ExceptionUserIdentifierClaimBadFormat);
+        }
+
+        public static long? GetOptionalUserId(this ControllerBase controller)
+        {
+            var claim = controller.User.FindFirst(ClaimTypes.NameIdentifier);
+            if (claim == null)
+                return null;
+
+            if (long.TryParse(claim.Value, out var value))
+                return value;
+
+            throw new InvalidOperationException(ExceptionUserIdentifierClaimBadFormat);
+        }
+    }
+}