create, read, playercount

Shogi.Api/Extensions/ContractsExtensions.cs

@@ -0,0 +1,52 @@
+using Shogi.Contracts.Types;
+using System.Collections.ObjectModel;
+using System.Linq;
+
+namespace Shogi.Api.Extensions;
+
+public static class ContractsExtensions
+{
+	public static WhichPlayer ToContract(this Domain.WhichPlayer player)
+	{
+		return player switch
+		{
+			Domain.WhichPlayer.Player1 => WhichPlayer.Player1,
+			Domain.WhichPlayer.Player2 => WhichPlayer.Player2,
+			_ => throw new NotImplementedException(),
+		};
+	}
+
+	public static WhichPiece ToContract(this Domain.WhichPiece piece)
+	{
+		return piece switch
+		{
+			Domain.WhichPiece.King => WhichPiece.King,
+			Domain.WhichPiece.GoldGeneral => WhichPiece.GoldGeneral,
+			Domain.WhichPiece.SilverGeneral => WhichPiece.SilverGeneral,
+			Domain.WhichPiece.Bishop => WhichPiece.Bishop,
+			Domain.WhichPiece.Rook => WhichPiece.Rook,
+			Domain.WhichPiece.Knight => WhichPiece.Knight,
+			Domain.WhichPiece.Lance => WhichPiece.Lance,
+			Domain.WhichPiece.Pawn => WhichPiece.Pawn,
+			_ => throw new NotImplementedException(),
+		};
+	}
+
+	public static Piece ToContract(this Domain.ValueObjects.Piece piece) => new()
+	{
+		IsPromoted = piece.IsPromoted,
+		Owner = piece.Owner.ToContract(),
+		WhichPiece = piece.WhichPiece.ToContract()
+	};
+
+	public static IReadOnlyList<Piece> ToContract(this List<Domain.ValueObjects.Piece> pieces)
+	{
+		return pieces
+			.Select(ToContract)
+			.ToList()
+			.AsReadOnly();
+	}
+
+	public static Dictionary<string, Piece?> ToContract(this ReadOnlyDictionary<string, Domain.ValueObjects.Piece?> boardState) =>
+		boardState.ToDictionary(kvp => kvp.Key, kvp => kvp.Value?.ToContract());
+}