DispNameChanger

package me.captain.DispNameChanger;

import java.util.ArrayList;
import java.util.List;
import java.util.logging.Logger;

import javax.persistence.PersistenceException;

import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.plugin.PluginManager;
import org.bukkit.plugin.java.JavaPlugin;
import com.nijiko.permissions.PermissionHandler;
import com.nijikokun.bukkit.Permissions.Permissions;
import org.bukkit.plugin.Plugin;



public class DispNameChanger extends JavaPlugin {

    private boolean UsePermissions;
    public static PermissionHandler Permissions;
    private void setupPermissions() {
        Plugin test = this.getServer().getPluginManager().getPlugin("Permissions");
        if (this.Permissions == null) {
            if (test != null) {
                UsePermissions = true;
                this.Permissions = ((Permissions) test).getHandler();
                System.out.println("[DispNameChanger] Permissions system detected!");
            } else {
                log.info("Permission system not detected, defaulting to OP");
                UsePermissions = false;
            }
        }
    }

     private void setupDatabase() {
            try {
                getDatabase().find(DNCPersistence.class).findRowCount();
            } catch (PersistenceException ex) {
                System.out.println("Installing database for " + getDescription().getName() + " due to first time usage");
                installDDL();
            }
        }
        @Override
        public List<Class<?>> getDatabaseClasses() {
            List<Class<?>> list = new ArrayList<Class<?>>();
            list.add(DNCPersistence.class);
            return list;
        }


    public boolean canUseCheckName(Player p) {
        if (UsePermissions) {
            return this.Permissions.has(p, "dispname.check");
        }
        return p.isOp();
    }
    public boolean canUseChangeName(Player p) {
        if (UsePermissions) {
            return this.Permissions.has(p, "dispname.change");
        }
        return p.isOp();
    }

    private static final Logger log = Logger.getLogger("Minecraft");

    public void onEnable() {

        PluginManager pm = getServer().getPluginManager();
        setupPermissions();
        setupDatabase();
        log.info("[DispNameChanger] DispNameChanger has been enabled!");
    }

    public boolean onCommand(CommandSender sender, Command cmd, String commandLabel, String[] args){
        Player player = (Player) sender;
        if(commandLabel.equalsIgnoreCase("rename")){
            if (canUseChangeName((Player) sender)) {
                if(args.length==0)
                {
                    String rn = player.getName();
                    player.setDisplayName(rn);
                    player.sendMessage(ChatColor.GREEN + "Your name is now " + rn);
                    return true;
                }
                String p = args[0];
                String n = args[1];
                if(args[1] == null) {
                    Player changee = this.getServer().getPlayer(p);
                    changee.setDisplayName(p);
                }
                Player changee = this.getServer().getPlayer(p);
                if(changee == null) {
                    sender.sendMessage(ChatColor.RED + "That user doesn't exist, or isn't online.");
                        } else {
                Player changer = (Player) sender;
                changee.setDisplayName(n.replaceAll("(&([a-f0-9]))", "\u00A7$2"));
                changee.sendMessage(ChatColor.GREEN + "Your name is now " + n);
                changer.sendMessage(ChatColor.GREEN + p + "'s name is now " + n);
                DNCPersistence pClass = getDatabase().find(DNCPersistence.class).where().ieq("PlayerName", p).findUnique();
                if (pClass== null) {
                    pClass = new DNCPersistence ();
                }
                pClass.setPlayerName(p);
                pClass.setDisplayName(n);
                this.getDatabase().save(pClass);
                        }
                } else {
                    Player s = (Player) sender;
                    s.sendMessage(ChatColor.RED + "You don't have permisson to change names");
                }
                return true;
        }
        if(commandLabel.equalsIgnoreCase("checkname")){
            if (canUseCheckName((Player) sender)) {
                String p = args[0];
                Player changee = this.getServer().getPlayer(p);
                String name = changee.getName();
                Player changer = (Player) sender;
                changer.sendMessage(ChatColor.RED + p + "is really: " + name);
                } else {
                    Player s = (Player) sender;
                    s.sendMessage(ChatColor.RED + "You don't have permisson to change names");
                }
                return true;
        }
            return false;
    }

    public void onDisable() {
        log.info("[DispNameChanger] DispNameChanger has been disabled!");
    }

}