ze poker hand checker

src/ChainOfResponssibility/Poker/Validators/HandValidators/StraightValidation.cs

@@ -0,0 +1,22 @@
+using System.Linq;
+
+namespace ChainOfResponssibility.Poker.Validators.HandValidators
+{
+    public class StraightValidation : HandValidation
+    {
+        protected override string IsValid(Card[] hand)
+        {
+            var Value2Index = hand.Select((i, j) => i.GetIntValue() - j).Distinct();
+            if (!Value2Index.Skip(1).Any())// consecutive
+                return "You have a Straight with " + string.Join(", ", hand.Select(x => x.ToString()));
+
+            //special case for A,2,3,4,5
+            if (Value2Index.Count() == 2
+                && Value2Index.First() == 2//for 2,3,4,5
+                && Value2Index.Last() == 10)//for A
+                return "You have a Straight with " + string.Join(", ", hand.Select(x => x.ToString()));
+
+            return string.Empty;
+        }
+    }
+}