refactor: move promote to chessboard

app/src/main/java/chess/controller/commands/CastlingCommand.java

@@ -20,11 +20,11 @@ public class CastlingCommand extends PlayerCommand {
 
 	@Override
 	public CommandResult execute(Game game, OutputSystem outputSystem) {
-		// we must promote the pending pawn before
-		if (game.pawnShouldBePromoted())
-			return CommandResult.NotAllowed;
-
 		final ChessBoard board = game.getBoard();
+		
+		// we must promote the pending pawn before
+		if (board.pawnShouldBePromoted())
+			return CommandResult.NotAllowed;
 
 		if (bigCastling && !board.canBigCastle(game.getPlayerTurn()))
 			return CommandResult.NotAllowed;

app/src/main/java/chess/controller/commands/MoveCommand.java

@@ -28,7 +28,7 @@ public class MoveCommand extends PlayerCommand {
 		final ChessBoard board = game.getBoard();
 
 		// we must promote the pending pawn before
-		if (game.pawnShouldBePromoted())
+		if (board.pawnShouldBePromoted())
 			return CommandResult.NotAllowed;
 
 		Piece piece = board.pieceAt(move.getStart());
@@ -50,7 +50,7 @@ public class MoveCommand extends PlayerCommand {
 			return CommandResult.NotAllowed;
 		}
 
-		if (game.pawnShouldBePromoted())
+		if (board.pawnShouldBePromoted())
 			return CommandResult.ActionNeeded;
 
 		board.setLastMove(this.move);
@@ -71,7 +71,7 @@ public class MoveCommand extends PlayerCommand {
 	}
 
 	private void tryPromote(Game game, OutputSystem outputSystem) {
-		Coordinate pawnPos = game.pawnPromotePosition();
+		Coordinate pawnPos = game.getBoard().pawnPromotePosition();
 
 		if (pawnPos == null)
 			return;

app/src/main/java/chess/controller/commands/PromoteCommand.java

@@ -36,7 +36,7 @@ public class PromoteCommand extends PlayerCommand {
 	public CommandResult execute(Game game, OutputSystem outputSystem) {
 		final ChessBoard board = game.getBoard();
 
-		this.pieceCoords = game.pawnPromotePosition();
+		this.pieceCoords = board.pawnPromotePosition();
 
 		if (this.pieceCoords == null)
 			return CommandResult.NotAllowed;

app/src/main/java/chess/model/ChessBoard.java

@@ -4,6 +4,7 @@ import java.util.ArrayList;
 import java.util.List;
 
 import chess.model.visitor.KingIdentifier;
+import chess.model.visitor.PawnIdentifier;
 import chess.model.visitor.PiecePathChecker;
 
 public class ChessBoard {
@@ -220,6 +221,42 @@ public class ChessBoard {
 		return canCastle(color, 0, Direction.Left);
 	}
 
+	public boolean pawnShouldBePromoted() {
+		return pawnPromotePosition() != null;
+	}
+
+	/**
+	 * 
+	 * @return Null if there is no pawn to promote
+	 */
+	public Coordinate pawnPromotePosition() {
+		Coordinate piecePos = pawnPromotePosition(Color.White);
+		if (piecePos != null)
+			return piecePos;
+		return pawnPromotePosition(Color.Black);
+	}
+
+	/**
+	 * 
+	 * @return Null if there is no pawn to promote
+	 */
+	private Coordinate pawnPromotePosition(Color color) {
+		int enemyLineY = color == Color.White ? 0 : 7;
+		PawnIdentifier identifier = new PawnIdentifier(color);
+
+		for (int x = 0; x < Coordinate.VALUE_MAX; x++) {
+			Coordinate pieceCoords = new Coordinate(x, enemyLineY);
+			Piece piece = pieceAt(pieceCoords);
+
+			if (identifier.isPawn(piece))
+				return pieceCoords;
+
+		}
+
+		return null;
+	}
+
+
 	public Move getLastMove() {
 		return this.lastMove;
 	}

app/src/main/java/chess/model/Game.java

@@ -4,7 +4,6 @@ import java.util.Stack;
 
 import chess.controller.PlayerCommand;
 import chess.controller.commands.MoveCommand;
-import chess.model.visitor.PawnIdentifier;
 
 public class Game {
 	private final ChessBoard board;
@@ -51,41 +50,6 @@ public class Game {
 		return GameStatus.OnGoing;
 	}
 
-	public boolean pawnShouldBePromoted() {
-		return pawnPromotePosition() != null;
-	}
-
-	/**
-	 * 
-	 * @return Null if there is no pawn to promote
-	 */
-	public Coordinate pawnPromotePosition() {
-		Coordinate piecePos = pawnPromotePosition(Color.White);
-		if (piecePos != null)
-			return piecePos;
-		return pawnPromotePosition(Color.Black);
-	}
-
-	/**
-	 * 
-	 * @return Null if there is no pawn to promote
-	 */
-	private Coordinate pawnPromotePosition(Color color) {
-		int enemyLineY = color == Color.White ? 0 : 7;
-		PawnIdentifier identifier = new PawnIdentifier(color);
-
-		for (int x = 0; x < Coordinate.VALUE_MAX; x++) {
-			Coordinate pieceCoords = new Coordinate(x, enemyLineY);
-			Piece piece = getBoard().pieceAt(pieceCoords);
-
-			if (identifier.isPawn(piece))
-				return pieceCoords;
-
-		}
-
-		return null;
-	}
-
 	public void addAction(PlayerCommand command) {
 		this.movesHistory.add(command);
 	}