refactor draw

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

@@ -59,11 +59,7 @@ public class CommandExecutor {
 	}
 
 	private void switchPlayerTurn() {
-		if(this.game.switchPlayerTurn()) {
-			this.dispatcher.onDraw();
-			this.dispatcher.onGameEnd();
-			return;
-		}
+		this.game.switchPlayerTurn();
 		this.dispatcher.onPlayerTurn(this.game.getPlayerTurn());
 	}
 
@@ -75,6 +71,9 @@ public class CommandExecutor {
 		GameStatus gameStatus = this.game.checkGameStatus();
 
 		switch (gameStatus) {
+			case Draw:
+				this.dispatcher.onDraw();
+				return true;
 			case Check:
 				this.dispatcher.onKingInCheck();
 				return false;

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

@@ -13,8 +13,10 @@ public class Game {
 	private final Stack<PlayerCommand> movesHistory;
 	private final Map<Color, Map<Integer, Integer>> traitsPos;
 
+	private static final int DRAW_REPETITONS = 3;
+
 	public enum GameStatus {
-		Check, CheckMate, OnGoing, Pat;
+		Draw, Check, CheckMate, OnGoing, Pat;
 	}
 
 	public Game(ChessBoard board) {
@@ -42,26 +44,45 @@ public class Game {
 	 * @param color the current player turn
 	 * @return true if a draw should be declared
 	 */
-	private boolean saveTraitPiecesPos(Color color) {
+	private void saveTraitPiecesPos(Color color) {
 		int piecesHash = this.board.hashPlayerPieces(color);
 		Integer count = this.traitsPos.get(color).get(piecesHash);
 		this.traitsPos.get(color).put(piecesHash, count == null ? 1 : count + 1);
-		return count == null ? false : count == (3 - 1);
+	}
+
+	/**
+	 * 
+	 * @param player the trait to check
+	 * @return true if a position is repeated DRAW_REPETITONS times
+	 */
+	private boolean checkDraw(Color player) {
+		return this.traitsPos.get(player).containsValue(DRAW_REPETITONS);
+	}
+
+	/**
+	 * @return whether the game is in a draw situation
+	 */
+	private boolean checkDraw() {
+		if (checkDraw(Color.White))
+			return true;
+		return checkDraw(Color.Black);
 	}
 
 	/**
 	 * 
 	 * @return true if a draw should occur
 	 */
-	public boolean switchPlayerTurn() {
-		boolean draw = saveTraitPiecesPos(this.playerTurn);
+	public void switchPlayerTurn() {
+		saveTraitPiecesPos(this.playerTurn);
 		playerTurn = Color.getEnemy(playerTurn);
-		return draw;
 	}
 
 	public GameStatus checkGameStatus() {
 		final Color enemy = Color.getEnemy(getPlayerTurn());
 
+		if(checkDraw())
+			return GameStatus.Draw;
+
 		if (this.board.isKingInCheck(enemy))
 			if (this.board.hasAllowedMoves(enemy))
 				return GameStatus.Check;