checkpoint

Shogi.Domain/ValueObjects/Pieces/Rook.cs

@@ -0,0 +1,51 @@
+using Shogi.Domain.ValueObjects.Movement;
+using System.Collections.ObjectModel;
+
+namespace Shogi.Domain.ValueObjects;
+
+public record class Rook : Piece
+{
+  public static readonly ReadOnlyCollection<Path> Player1Paths = new(new List<Path>(4)
+      {
+          new Path(Direction.Forward, Distance.MultiStep),
+          new Path(Direction.Left, Distance.MultiStep),
+          new Path(Direction.Right, Distance.MultiStep),
+          new Path(Direction.Backward, Distance.MultiStep)
+      });
+
+  private static readonly ReadOnlyCollection<Path> PromotedPlayer1Paths = new(new List<Path>(8)
+      {
+          new Path(Direction.Forward, Distance.MultiStep),
+          new Path(Direction.Left, Distance.MultiStep),
+          new Path(Direction.Right, Distance.MultiStep),
+          new Path(Direction.Backward, Distance.MultiStep),
+          new Path(Direction.ForwardLeft),
+          new Path(Direction.ForwardRight),
+          new Path(Direction.BackwardLeft),
+          new Path(Direction.BackwardRight)
+      });
+
+  public static readonly ReadOnlyCollection<Path> Player2Paths =
+      Player1Paths
+      .Select(m => m.Invert())
+      .ToList()
+      .AsReadOnly();
+
+  public static readonly ReadOnlyCollection<Path> Player2PromotedPaths =
+      PromotedPlayer1Paths
+      .Select(m => m.Invert())
+      .ToList()
+      .AsReadOnly();
+
+  public Rook(WhichPlayer owner, bool isPromoted = false)
+      : base(WhichPiece.Rook, owner, isPromoted)
+  {
+  }
+
+  public override ReadOnlyCollection<Path> MoveSet => Owner switch
+  {
+    WhichPlayer.Player1 => IsPromoted ? PromotedPlayer1Paths : Player1Paths,
+    WhichPlayer.Player2 => IsPromoted ? Player2PromotedPaths : Player2Paths,
+    _ => throw new NotImplementedException(),
+  };
+}