promote not that uggly

app/src/main/java/chess/io/CommandExecutor.java

@@ -1,6 +1,12 @@
 package chess.io;
 
+import chess.io.commands.MoveCommand;
+import chess.model.ChessBoard;
+import chess.model.Color;
+import chess.model.Coordinate;
 import chess.model.Game;
+import chess.model.Piece;
+import chess.model.pieces.Pawn;
 
 public class CommandExecutor {
 
@@ -14,8 +20,11 @@ public class CommandExecutor {
 
 	public CommandResult executeCommand(Command command) {
 		CommandResult result = command.execute(this.game, this.outputSystem);
-		if (result == CommandResult.Moved)
+		if (result == CommandResult.Moved) {
+			checkPromotion(((MoveCommand) command).getMove().getFinish());
+			checkGameStatus();
 			alternatePlayers();
+		}
 		return result;
 	}
 
@@ -32,4 +41,37 @@ public class CommandExecutor {
 		this.game = game;
 	}
 
+	private void checkPromotion(Coordinate pieceCoords) {
+
+		Piece piece = this.game.getBoard().pieceAt(pieceCoords);
+
+		if (piece == null || !(piece instanceof Pawn))
+			return;
+
+		int destY = pieceCoords.getY();
+
+		int enemyLine = piece.getColor() == Color.White ? 0 : 7;
+
+		if (destY == enemyLine) {
+			outputSystem.promotePawn(pieceCoords);
+		}
+	}
+
+	private void checkGameStatus() {
+		final ChessBoard board = game.getBoard();
+
+		final Color enemy = Color.getEnemy(game.getPlayerTurn());
+
+		if (board.isKingInCheck(enemy)) {
+			if (board.hasAllowedMoves(enemy)) {
+				outputSystem.kingIsInCheck();
+			} else {
+				outputSystem.kingIsInMat();
+				outputSystem.winnerIs(game.getPlayerTurn());
+			}
+		} else if (!board.hasAllowedMoves(enemy)) {
+			outputSystem.patSituation();
+		}
+	}
+
 }

app/src/main/java/chess/io/OutputSystem.java

@@ -1,6 +1,9 @@
 package chess.io;
 
+import chess.io.commands.MoveCommand;
+import chess.io.commands.PromoteCommand;
 import chess.model.Color;
+import chess.model.Coordinate;
 
 public interface OutputSystem {
 
@@ -17,4 +20,6 @@ public interface OutputSystem {
 	void hasSurrendered(Color color);
 
 	void gameStarted();
+
+	void promotePawn(Coordinate pieceCoords);
 }

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

@@ -3,8 +3,8 @@ package chess.io.commands;
 import chess.io.Command;
 import chess.io.CommandResult;
 import chess.io.OutputSystem;
+import chess.io.commands.PromoteCommand.PromoteType;
 import chess.model.ChessBoard;
-import chess.model.Color;
 import chess.model.Game;
 import chess.model.Move;
 import chess.model.Piece;
@@ -17,6 +17,10 @@ public class MoveCommand extends Command {
 		this.move = move;
 	}
 
+	public Move getMove() {
+		return move;
+	}
+
 	@Override
 	public CommandResult execute(Game game, OutputSystem outputSystem) {
 		final ChessBoard board = game.getBoard();
@@ -39,25 +43,7 @@ public class MoveCommand extends Command {
 			return CommandResult.NotAllowed;
 		}
 
-		checkGameStatus(game, outputSystem);
-
 		return CommandResult.Moved;
 	}
 
-	private void checkGameStatus(Game game, OutputSystem outputSystem) {
-		final ChessBoard board = game.getBoard();
-
-		final Color enemy = Color.getEnemy(game.getPlayerTurn());
-
-		if (board.isKingInCheck(enemy)) {
-			if (board.hasAllowedMoves(enemy)) {
-				outputSystem.kingIsInCheck();
-			} else {
-				outputSystem.kingIsInMat();
-				outputSystem.winnerIs(game.getPlayerTurn());
-			}
-		} else if(!board.hasAllowedMoves(enemy)) {
-			outputSystem.patSituation();
-		}
-	}
 }

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

@@ -0,0 +1,74 @@
+package chess.io.commands;
+
+import chess.io.Command;
+import chess.io.CommandResult;
+import chess.io.OutputSystem;
+import chess.model.ChessBoard;
+import chess.model.Color;
+import chess.model.Coordinate;
+import chess.model.Game;
+import chess.model.Piece;
+import chess.model.pieces.Bishop;
+import chess.model.pieces.Knight;
+import chess.model.pieces.Pawn;
+import chess.model.pieces.Queen;
+import chess.model.pieces.Rook;
+
+public class PromoteCommand extends Command {
+
+	public enum PromoteType {
+		Queen,
+		Rook,
+		Bishop,
+		Knight
+	}
+
+	private final PromoteType promoteType;
+	private final Coordinate pieceCoords;
+
+	public PromoteCommand(PromoteType promoteType, Coordinate pieceCoords) {
+		this.promoteType = promoteType;
+		this.pieceCoords = pieceCoords;
+	}
+
+	@Override
+	public CommandResult execute(Game game, OutputSystem outputSystem) {
+		final ChessBoard board = game.getBoard();
+
+		Piece pawn = board.pieceAt(this.pieceCoords);
+		if (pawn == null || !(pawn instanceof Pawn))
+			return CommandResult.NotAllowed;
+
+		int destY = this.pieceCoords.getY();
+
+		int enemyLine = pawn.getColor() == Color.White ? 0 : 7;
+
+		if (destY != enemyLine)
+			return CommandResult.NotAllowed;
+
+		board.pieceLeaves(this.pieceCoords);
+		board.pieceComes(createPiece(this.promoteType, pawn.getColor()), this.pieceCoords);
+
+		return CommandResult.NotMoved;
+	}
+
+	private Piece createPiece(PromoteType promoteType, Color color) {
+		switch (promoteType) {
+			case Queen:
+				return new Queen(color);
+
+			case Bishop:
+				return new Bishop(color);
+
+			case Knight:
+				return new Knight(color);
+
+			case Rook:
+				return new Rook(color);
+
+			default:
+				return null;
+		}
+	}
+
+}

app/src/main/java/chess/model/visitor/PermissiveRuleChecker.java

@@ -86,8 +86,8 @@ public class PermissiveRuleChecker implements PieceVisitor<Boolean> {
 		}
 
 		// Allowing small diagonal moves
-		if (directionIndexOffset == Direction.FrontLeft.getIndexOffset()
+		if (directionIndexOffset * pawn.multiplier() == Direction.FrontLeft.getIndexOffset()
-				|| directionIndexOffset == Direction.FrontRight.getIndexOffset()) {
+				|| directionIndexOffset * pawn.multiplier() == Direction.FrontRight.getIndexOffset()) {
 			return distance == 1;
 		}
 

app/src/main/java/chess/simplerender/Window.java

@@ -17,6 +17,8 @@ import chess.io.OutputSystem;
 import chess.io.commands.GetAllowedMovesCommand;
 import chess.io.commands.GetPieceAtCommand;
 import chess.io.commands.MoveCommand;
+import chess.io.commands.PromoteCommand;
+import chess.io.commands.PromoteCommand.PromoteType;
 import chess.model.Coordinate;
 import chess.model.Move;
 import chess.model.Piece;
@@ -96,7 +98,7 @@ public class Window extends JFrame implements OutputSystem {
 
 	private boolean previewMoves(int x, int y) {
 		GetAllowedMovesCommand movesCommand = new GetAllowedMovesCommand(new Coordinate(x, y));
-		if(sendCommand(movesCommand) == CommandResult.NotAllowed)
+		if (sendCommand(movesCommand) == CommandResult.NotAllowed)
 			return false;
 
 		List<Coordinate> allowedMoves = movesCommand.getDestinations();
@@ -180,4 +182,10 @@ public class Window extends JFrame implements OutputSystem {
 		buildBoard();
 	}
 
+	@Override
+	public void promotePawn(Coordinate pieceCoords) {
+		System.out.println("PROMOTE");
+		sendCommand(new PromoteCommand(PromoteType.Queen, pieceCoords));
+	}
+
 }