content: /*
      This file is part of the HeavenMS MapleStory Server
      Copyleft (L) 2016 - 2019 RonanLana
  
      This program is free software: you can redistribute it and/or modify
      it under the terms of the GNU Affero General Public License as
      published by the Free Software Foundation version 3 as published by
      the Free Software Foundation. You may not use, modify or distribute
      this program under any other version of the GNU Affero General Public
      License.
  
      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 Affero General Public License for more details.
  
      You should have received a copy of the GNU Affero General Public License
      along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
  package net.server.channel.handlers;
  
  import constants.inventory.ItemConstants;
  
  import client.MapleCharacter;
  import client.MapleClient;
  import client.inventory.Item;
  import client.newyear.NewYearCardRecord;
  import java.sql.Connection;
  import java.sql.PreparedStatement;
  import java.sql.ResultSet;
  import java.sql.SQLException;
  import net.AbstractMaplePacketHandler;
  import net.server.Server;
  import tools.DatabaseConnection;
  import tools.MaplePacketCreator;
  import tools.data.input.SeekableLittleEndianAccessor;
  
  /**
   *
   * @author Ronan
   * 
   * Header layout thanks to Eric 
   */
  public final class NewYearCardHandler extends AbstractMaplePacketHandler {
  
      @Override
      public final void handlePacket(SeekableLittleEndianAccessor slea, MapleClient c) {        
          final MapleCharacter player = c.getPlayer();
          byte reqMode = slea.readByte();                 //[00] -> NewYearReq (0 = Send) 
          
          if(reqMode == 0) {  // card has been sent
              if(player.haveItem(2160101)) {  // new year's card
                  short slot = slea.readShort();                      //[00 2C] -> nPOS (Item Slot Pos) 
                  int itemid = slea.readInt();                        //[00 20 F5 E5] -> nItemID (item id) 
  
                  int status = getValidNewYearCardStatus(itemid, player, slot);
                  if(status == 0) {
                      if(player.canHold(4300000, 1)) {
                          String receiver = slea.readMapleAsciiString();  //[04 00 54 65 73 74] -> sReceiverName (person to send to) 
  
                          int receiverid = getReceiverId(receiver, c.getWorld());
                          if(receiverid != -1) {
                              if(receiverid != c.getPlayer().getId()) {
                                  String message = slea.readMapleAsciiString();   //[06 00 4C 65 74 74 65 72] -> sContent (message)  
  
                                  NewYearCardRecord newyear = new NewYearCardRecord(player.getId(), player.getName(), receiverid, receiver, message);
                                  NewYearCardRecord.saveNewYearCard(newyear);
                                  player.addNewYearRecord(newyear);
  
                                  player.getAbstractPlayerInteraction().gainItem(2160101, (short)-1);
                                  player.getAbstractPlayerInteraction().gainItem(4300000, (short) 1);
  
                                  Server.getInstance().setNewYearCard(newyear);
                                  newyear.startNewYearCardTask();
                                  player.announce(MaplePacketCreator.onNewYearCardRes(player, newyear, 4, 0));    // successfully sent
                              } else {
                                  player.announce(MaplePacketCreator.onNewYearCardRes(player, -1, 5, 0xF));   // cannot send to yourself
                              }
                          } else {
                              player.announce(MaplePacketCreator.onNewYearCardRes(player, -1, 5, 0x13));  // cannot find such character
                          }
                      } else {
                          player.announce(MaplePacketCreator.onNewYearCardRes(player, -1, 5, 0x10));  // inventory full
                      }
                  } else {
                      player.announce(MaplePacketCreator.onNewYearCardRes(player, -1, 5, status));  // item and inventory errors
                  }
              } else {
                  player.announce(MaplePacketCreator.onNewYearCardRes(player, -1, 5, 0x11));  // have no card to send
              }
          } else {    //receiver accepted the card
              int cardid = slea.readInt();
              
              NewYearCardRecord newyear = NewYearCardRecord.loadNewYearCard(cardid);
              
              if(newyear != null && newyear.getReceiverId() == player.getId() && !newyear.isReceiverCardReceived()) {
                  if(!newyear.isSenderCardDiscarded()) {
                      if(player.canHold(4301000, 1)) {
                          newyear.stopNewYearCardTask();
                          NewYearCardRecord.updateNewYearCard(newyear);
  
                          player.getAbstractPlayerInteraction().gainItem(4301000, (short)1);
                          if(!newyear.getMessage().isEmpty()) player.dropMessage(6, "[New Year] " + newyear.getSenderName() + ": " + newyear.getMessage());
  
                          player.addNewYearRecord(newyear);
                          player.announce(MaplePacketCreator.onNewYearCardRes(player, newyear, 6, 0));    // successfully rcvd
  
                          player.getMap().broadcastMessage(MaplePacketCreator.onNewYearCardRes(player, newyear, 0xD, 0));
  
                          MapleCharacter sender = c.getWorldServer().getPlayerStorage().getCharacterById(newyear.getSenderId());
                          if(sender != null && sender.isLoggedinWorld()) {
                              sender.getMap().broadcastMessage(MaplePacketCreator.onNewYearCardRes(sender, newyear, 0xD, 0));
                              sender.dropMessage(6, "[New Year] Your addressee successfully received the New Year card.");
                          }
                      } else {
                          player.announce(MaplePacketCreator.onNewYearCardRes(player, -1, 5, 0x10));  // inventory full
                      }
                  } else {
                      player.dropMessage(6, "[New Year] The sender of the New Year card already dropped it. Nothing to receive.");
                  }
              } else {
                  if(newyear == null) {
                      player.dropMessage(6, "[New Year] The sender of the New Year card already dropped it. Nothing to receive.");
                  }
              }
          }
      }
      
      private static int getReceiverId(String receiver, int world) {
          try (Connection con = DatabaseConnection.getConnection()) {
              try (PreparedStatement ps = con.prepareStatement("SELECT id, world FROM characters WHERE name LIKE ?")) {
                  ps.setString(1, receiver);
                  try (ResultSet rs = ps.executeQuery()) {
                      if (rs.next()) {
                          if(rs.getInt("world") == world) {
                              return rs.getInt("id");
                          }
                      }
                  }
              }
          } catch(SQLException sqle) {
              sqle.printStackTrace();
          }
          
          return -1;
      }
      
      private static int getValidNewYearCardStatus(int itemid, MapleCharacter player, short slot) {
          if(!ItemConstants.isNewYearCardUse(itemid)) return 0x14;
          
          Item it = player.getInventory(ItemConstants.getInventoryType(itemid)).getItem(slot);        
          return (it != null && it.getItemId() == itemid) ? 0 : 0x12;
      } 
  }
  