antidual box for Zones - By LordPanic

package net.sf.l2j.gameserver.model.zone.type;


import java.util.HashMap;

import net.sf.l2j.gameserver.enums.ZoneId;
import net.sf.l2j.gameserver.model.actor.Creature;
import net.sf.l2j.gameserver.model.actor.Player;
import net.sf.l2j.gameserver.model.zone.ZoneType;
import net.sf.l2j.gameserver.network.GameClient;


public class TestZone2 extends ZoneType
{

	private final  HashMap<String, Integer> _ipPool = new HashMap<>();

	public TestZone2(int id)
	{
		super(id);
	}

	@Override
	protected void onEnter(Creature character)
	{
		if(character instanceof Player)
		{
			Player player = (Player) character;
			String ipHolder = player.getClient().getConnection().getInetAddress().getHostAddress();
			checkIfsmIP(ipHolder,player);
			player.sendMessage(ipHolder);
			player.setInsideZone(ZoneId.TESTZONE, true);
		}
	}

	@Override
	protected void onExit(Creature character)
	{
		if(character instanceof Player)
		{
		Player player = (Player) character;
		GameClient client = player.getClient();
		if (client == null || client.isDetached()) {
			_ipPool.clear();
		}else {
		String ipHolder = player.getClient().getConnection().getInetAddress().getHostAddress();
		character.setInsideZone(ZoneId.TESTZONE, false);
		removeIp(ipHolder,player);
		}
		}
	}

	public void removeIp(String ipHldr, Player activeChar) {
		if(_ipPool.get(ipHldr) == 2) {
		_ipPool.replace(ipHldr, 2, 1);
		}else if(_ipPool.get(ipHldr) == 1) {
			_ipPool.remove(ipHldr);
		}
	}

	public void checkIfsmIP(String ipHldr, Player activeChar) {
		if(_ipPool.containsKey(ipHldr)) {
			_ipPool.replace(ipHldr, 1, 2);
			if(_ipPool.get(ipHldr) == 2) {
			activeChar.teleportTo(83080, 148200, -3464, 0);
			activeChar.sendMessage("You can't use dual box in this zone.");
			}
		}else {
		_ipPool.put(ipHldr, 1);
		}
	}
}