add general ai

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

@@ -57,14 +57,14 @@ public class CommandExecutor {
 					this.dispatcher.onGameEnd();
 					return;
 				}
-				switchPlayerTurn();
+				switchPlayerTurn(command instanceof UndoCommand);
 				return;
 		}
 	}
 
-	private void switchPlayerTurn() {
+	private void switchPlayerTurn(boolean undone) {
 		this.game.switchPlayerTurn();
-		this.dispatcher.onPlayerTurn(this.game.getPlayerTurn());
+		this.dispatcher.onPlayerTurn(this.game.getPlayerTurn(), undone);
 	}
 
 	/**

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

@@ -51,7 +51,7 @@ public class NewGameCommand extends Command {
 		game.reset();
 
 		outputSystem.onGameStart();
-		outputSystem.onPlayerTurn(game.getPlayerTurn());
+		outputSystem.onPlayerTurn(game.getPlayerTurn(), false);
 
 		return CommandResult.NotMoved;
 	}

app/src/main/java/chess/controller/event/EmptyGameDispatcher.java

@@ -43,7 +43,7 @@ public class EmptyGameDispatcher extends GameDispatcher {
 	}
 
 	@Override
-	public void onPlayerTurn(Color color) {
+	public void onPlayerTurn(Color color, boolean undone) {
 	}
 
 	@Override

app/src/main/java/chess/controller/event/GameAdaptator.java

@@ -7,7 +7,7 @@ import chess.model.Move;
 public abstract class GameAdaptator implements GameListener {
 
 	@Override
-	public void onPlayerTurn(Color color) {}
+	public void onPlayerTurn(Color color, boolean undone) {}
 
 	@Override
 	public void onWin(Color color) {}

app/src/main/java/chess/controller/event/GameDispatcher.java

@@ -29,8 +29,8 @@ public class GameDispatcher implements GameListener {
 	}
 
 	@Override
-	public void onPlayerTurn(Color color) {
-		asyncForEachCall((l) -> l.onPlayerTurn(color));
+	public void onPlayerTurn(Color color, boolean undone) {
+		asyncForEachCall((l) -> l.onPlayerTurn(color, undone));
 	}
 
 	@Override

app/src/main/java/chess/controller/event/GameListener.java

@@ -56,8 +56,9 @@ public interface GameListener {
 	/**
 	 * Invoked when it's the player turn
 	 * @param color the color of the player who should play
+	 * @param undone true if it's a result of an undo command
 	 */
-	void onPlayerTurn(Color color);
+	void onPlayerTurn(Color color, boolean undone);
 	
 	/**
 	 * Invoked when a pawn should be promoted