Commands

package me.ben.GlassDrops;

import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.event.Listener;

public class GlassDropsCommands implements Listener, CommandExecutor {

    private GlassDrops plugin;


    public GlassDropsCommands(GlassDrops instance) {
        plugin = instance;
    }


    @Override
    public boolean onCommand(CommandSender sender, Command cmd, String commandLabel, String[] arg) {
        if (commandLabel.equalsIgnoreCase("gd") && sender.hasPermission("glassdrops.toggle")) {
            if (sender instanceof Player == false) {
                return true;
        }

            Player player = ((Player) sender);
            String PlayerName = player.getName();

            if (plugin.droptoggle.contains(PlayerName)) {
                player.sendMessage(ChatColor.GREEN + "Glass is already being dropped!");
                return true;
        }
            if(!plugin.droptoggle.contains(PlayerName)){
            plugin.droptoggle.add(PlayerName);{
            player.sendMessage(ChatColor.GREEN + "Glass is now bring dropped!");
            return true;
            }
        }
    }


        else if (commandLabel.equalsIgnoreCase("ngd") && sender.hasPermission("glassdrops.toggle")) {
            if (sender instanceof Player == false) {
                return true;
            }

            Player player = ((Player) sender);
            String PlayerName = player.getName();

            if (!plugin.droptoggle.contains(PlayerName)) {
                player.sendMessage(ChatColor.RED + "Glass is already being broken!");
                return true;
        }
            if(plugin.droptoggle.contains(PlayerName)){
            plugin.droptoggle.remove(PlayerName);{
            player.sendMessage(ChatColor.RED + "Glass will now be broken!");
            return true;
            }
        }
    }
        return true;
    }

}