L2j Change Sex

/*
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program. If not, see <http://www.gnu.org/licenses/>.
 */
package custom.ChangeSex;

import com.l2jserver.gameserver.model.actor.L2Npc;
import com.l2jserver.gameserver.model.actor.instance.L2PcInstance;
import com.l2jserver.gameserver.model.quest.Quest;
import com.l2jserver.gameserver.model.quest.QuestState;
import com.l2jserver.gameserver.instancemanager.QuestManager;

/******************************
 * @author Gladicek           *
 * Custom Npc 'Change Sex'    *
 *****************************/

 public class ChangeSex extends Quest
 {
  // Npc
    private static final int NpcId = 49297; // Custom Npc
  // Item
  private static final int ItemId = 6673; // Festival Adena

    public ChangeSex(int questId, String name, String descr)
    {
        super(questId, name, descr);
        addStartNpc(NpcId);
    addFirstTalkId(NpcId);
    addTalkId(NpcId);
    }

    @Override
    public String onAdvEvent(String event, L2Npc npc, L2PcInstance player)
    {
        String htmltext = event;
        final QuestState st = player.getQuestState(getName());

        if (event.equalsIgnoreCase("change_sex"))
        {
     if(st.getQuestItemsCount(ItemId) >= 1)
     {
       st.takeItems(ItemId,1);
         player.getAppearance().setSex(player.getAppearance().getSex() ? false : true);
             player.sendMessage("Your gender has been changed!");
             player.broadcastUserInfo();
             player.decayMe();
           player.spawnMe(player.getX(), player.getY(), player.getZ());
       return null;
     }
     else
      return "49297-no.htm";
    }
   return htmltext;
    }

    @Override
    public String onFirstTalk(L2Npc npc, L2PcInstance player)
    {
        QuestState st = player.getQuestState(getName());
        if (st == null)
        {
            Quest q = QuestManager.getInstance().getQuest(getName());
            st = q.newQuestState(player);
    }
        return "49297.htm";
    }

    public static void main(String[] args)
    {
        new ChangeSex(-1, "ChangeSex", "custom");
    _log.info("ChangeSex: Loaded (Created by Gladicek)");
    }
}