java source code of SetLangCommand

package me.onebone.economyapi.command;

/*
 * EconomyAPI: Core of economy system for Nukkit
 * Copyright (C) 2016  onebone <[email protected]>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

import me.onebone.economyapi.EconomyAPI;

import cn.nukkit.command.Command;
import cn.nukkit.command.CommandSender;
import cn.nukkit.utils.TextFormat;

public class SetLangCommand extends Command{
	private EconomyAPI plugin;
	
	public SetLangCommand(EconomyAPI plugin) {
		super("setlang", "Sets your preferred language", "/setlang <ccTLD>");
		
		this.plugin = plugin;
	}

	@Override
	public boolean execute(CommandSender sender, String label, String[] args) {
		if(!this.plugin.isEnabled()) return false;
		if(!sender.hasPermission("economyapi.command.setlang")){
			sender.sendMessage(TextFormat.RED + "You don't have permission to use this command.");
			return false;
		}
		
		if(args.length < 1){
			sender.sendMessage(TextFormat.RED + "Usage: " + this.getUsage());
			return true;
		}
		String lang = args[0];
		
		// TODO
		return true;
	}
}