content: /**
   * This file is part of Aion-Lightning <aion-lightning.org>.
   *
   *  Aion-Lightning 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.
   *
   *  Aion-Lightning 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 Aion-Lightning.
   *  If not, see <http://www.gnu.org/licenses/>.
   */
  package com.aionemu.gameserver.network.loginserver;
  
  import java.nio.ByteBuffer;
  import java.util.HashMap;
  import java.util.Map;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.aionemu.gameserver.network.loginserver.LoginServerConnection.State;
  
  /**
   * @author -Nemesiss-
   * @author Luno
   */
  public class LsPacketHandler {
  
  	/**
  	 * logger for this class
  	 */
  	private static final Logger log = LoggerFactory.getLogger(LsPacketHandler.class);
  	private static Map<State, Map<Integer, LsClientPacket>> packetPrototypes = new HashMap<State, Map<Integer, LsClientPacket>>();
  
  	/**
  	 * Reads one packet from given ByteBuffer
  	 *
  	 * @param data
  	 * @param client
  	 * @return GsClientPacket object from binary data
  	 */
  	public LsClientPacket handle(ByteBuffer data, LoginServerConnection client) {
  		State state = client.getState();
  		int id = data.get() & 0xff;
  
  		return getPacket(state, id, data, client);
  	}
  
  	public void addPacketPrototype(LsClientPacket packetPrototype, State... states) {
  		for (State state : states) {
  			Map<Integer, LsClientPacket> pm = packetPrototypes.get(state);
  			if (pm == null) {
  				pm = new HashMap<Integer, LsClientPacket>();
  				packetPrototypes.put(state, pm);
  			}
  			pm.put(packetPrototype.getOpcode(), packetPrototype);
  		}
  	}
  
  	private LsClientPacket getPacket(State state, int id, ByteBuffer buf, LoginServerConnection con) {
  		LsClientPacket prototype = null;
  
  		Map<Integer, LsClientPacket> pm = packetPrototypes.get(state);
  		if (pm != null) {
  			prototype = pm.get(id);
  		}
  
  		if (prototype == null) {
  			unknownPacket(state, id);
  			return null;
  		}
  
  		LsClientPacket res = prototype.clonePacket();
  		res.setBuffer(buf);
  		res.setConnection(con);
  
  		return res;
  	}
  
  	/**
  	 * Logs unknown packet.
  	 *
  	 * @param state
  	 * @param id
  	 */
  	private void unknownPacket(State state, int id) {
  		log.warn(String.format("Unknown packet recived from Login Server: 0x%02X state=%s", id, state.toString()));
  	}
  }
  