Organize domain project.

Shogi.Domain/YetToBeAssimilatedIntoDDD/Notation.cs

@@ -0,0 +1,33 @@
+using System.Text.RegularExpressions;
+
+namespace Shogi.Domain.YetToBeAssimilatedIntoDDD
+{
+    public static class Notation
+    {
+        private static readonly string BoardNotationRegex = @"(?<file>[A-I])(?<rank>[1-9])";
+        private static readonly char A = 'A';
+
+        public static string ToBoardNotation(Vector2 vector)
+        {
+            return ToBoardNotation((int)vector.X, (int)vector.Y);
+        }
+
+        public static string ToBoardNotation(int x, int y)
+        {
+            var file = (char)(x + A);
+            var rank = y + 1;
+            return $"{file}{rank}";
+        }
+        public static Vector2 FromBoardNotation(string notation)
+        {
+            if (Regex.IsMatch(notation, BoardNotationRegex))
+            {
+                var match = Regex.Match(notation, BoardNotationRegex, RegexOptions.IgnoreCase);
+                char file = match.Groups["file"].Value[0];
+                int rank = int.Parse(match.Groups["rank"].Value);
+                return new Vector2(file - A, rank - 1);
+            }
+            throw new ArgumentException($"Board notation not recognized. Notation given: {notation}");
+        }
+    }
+}