changeplayername.java

package net.rymate.ChangeName;

import java.util.logging.Logger;
import net.minecraft.server.v1_4_5.EntityPlayer;
import net.minecraft.server.v1_4_5.EntityTracker;
import net.minecraft.server.v1_4_5.WorldServer;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.craftbukkit.v1_4_5.entity.CraftPlayer;
import org.bukkit.entity.Player;
import org.bukkit.plugin.PluginDescriptionFile;
import org.bukkit.plugin.java.JavaPlugin;

public class ChangePlayerName
extends JavaPlugin
{
  Logger log = Logger.getLogger("Minecraft");
  
  public void onDisable()
  {
    this.log.info(getDescription().getName() + "disabled!");
  }
  
  public void onEnable()
  {
    this.log.info(getDescription().getName() + "enabled!");
  }
  
  public boolean onCommand(CommandSender sender, Command cmd, String commandLabel, String[] args)
  {
    if (!(sender instanceof CraftPlayer))
    {
      sender.sendMessage("You are not an in-game player!");
      return false;
    }
    if (sender.hasPermission("changename.change"))
    {
      EntityPlayer player = ((CraftPlayer)sender).getHandle();
      Player senderplayer = (Player)sender;
      if (args.length > 0)
      {
        sender.sendMessage("You are now disguised as " + args[0] + "!");
        senderplayer.setDisplayName(args[0]);
        setPlayerName(player, args[0]);
      }
      else
      {
        sender.sendMessage("Wrong usage! /changename <name>");
      }
      return true;
    }
    sender.sendMessage("Nope, can't do that!");
    return false;
  }
  
  public void setPlayerName(EntityPlayer player, String newname)
  {
    WorldServer world = (WorldServer)player.world;
    EntityTracker tracker = world.tracker;
    tracker.untrackEntity(player);
    player.name = newname;
    tracker.track(player);
  }
}