add CommandResult.NeedsAction

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

@@ -1,7 +1,6 @@
 package chess.io;
 
 import chess.io.Command.CommandResult;
-import chess.io.commands.MoveCommand;
 import chess.model.Game;
 import chess.model.Game.GameStatus;
 
@@ -29,21 +28,21 @@ public class CommandExecutor {
 	}
 
 	private void processResult(Command command, CommandResult result) {
-		if (result != CommandResult.Moved)
-			return;
-
-		if (command instanceof MoveCommand move) {
-			boolean needsPromote = this.game.pawnShouldBePromoted();
-			if (needsPromote)
-				this.outputSystem.promotePawn(move.getMove().getFinish());
-			
-			if (checkGameStatus())
+		switch (result) {
+			case NotAllowed:
+			case NotMoved:
 				return;
 
-			if(!needsPromote)
+			case ActionNeeded:
+				this.outputSystem.updateDisplay();
+				return;
+
+			case Moved:
+				if (checkGameStatus())
+					return;
 				switchPlayerTurn();
-		} else if (command instanceof PlayerCommand) {
-			switchPlayerTurn();
+				this.outputSystem.updateDisplay();
+				return;
 		}
 	}
 
@@ -63,7 +62,7 @@ public class CommandExecutor {
 			case Check:
 				this.outputSystem.kingIsInCheck();
 				return false;
-		
+
 			case CheckMate:
 				this.outputSystem.kingIsInMat();
 				this.outputSystem.winnerIs(this.game.getPlayerTurn());