AdminGUI

package me.roboticplayer.superadmin.commands;

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 me.roboticplayer.superadmin.inventories.MainGUI;

public class AdminGUI implements CommandExecutor {

    private MainGUI gui;

    public AdminGUI(MainGUI instance) {
        gui = instance;
    }

    @Override
    public boolean onCommand(CommandSender sender, Command cmd, String commandLabel, String[] args) {
        if (cmd.getName().equalsIgnoreCase("admingui")) {
            if (!(sender instanceof Player)) {
                sender.sendMessage(ChatColor.RED + "The console cannot use this command!");
                return true;
            }

            if (!(sender.hasPermission("superadmin.gui"))) {
                sender.sendMessage(ChatColor.DARK_RED + "You do not have permission to perform this command!");
                return true;
            }
            ((Player) sender).openInventory(gui.getMainInv());
        }
        return true;
    }
}