lots of things

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

@@ -0,0 +1,37 @@
+package chess.io;
+
+import chess.model.Game;
+
+public class CommandExecutor {
+
+	private final Game game;
+	private final OutputSystem outputSystem;
+
+	public CommandExecutor(Game game, OutputSystem outputSystem) {
+		this.game = game;
+		this.outputSystem = outputSystem;
+	}
+
+	public CommandResult executeCommand(Command command) {
+		CommandResult result = command.execute(this.game, this.outputSystem);
+		if (result == CommandResult.Moved)
+			alternatePlayers();
+		return result;
+	}
+
+	private void alternatePlayers() {
+		this.game.switchPlayerTurn();
+		this.outputSystem.playerTurn(this.game.getPlayerTurn());
+	}
+
+	public Game getGame() {
+		return game;
+	}
+
+	public OutputSystem getOutputSystem() {
+		return outputSystem;
+	}
+
+	
+
+}