sweetgum-server/src/net/server/channel/handlers/MoveLifeHandler.java

/*
	This file is part of the OdinMS Maple Story Server
    Copyright (C) 2008 Patrick Huy <[email protected]>
		       Matthias Butz <[email protected]>
		       Jan Christian Meyer <[email protected]>

    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 client.MapleCharacter;
import client.MapleClient;
import java.awt.Point;
import java.util.ArrayList;
import java.util.List;
import server.life.MapleMonster;
import server.life.MobSkill;
import server.life.MobSkillFactory;
import server.maps.MapleMap;
import server.maps.MapleMapObject;
import server.maps.MapleMapObjectType;
import server.movement.LifeMovementFragment;
import tools.MaplePacketCreator;
import tools.Pair;
import tools.Randomizer;
import tools.data.input.SeekableLittleEndianAccessor;

public final class MoveLifeHandler extends AbstractMovementPacketHandler {
    @Override
    public final void handlePacket(SeekableLittleEndianAccessor slea, MapleClient c) {
        MapleMap map = c.getPlayer().getMap();
        List<MapleCharacter> banishPlayers = new ArrayList<>();
        
        int objectid = slea.readInt();
        short moveid = slea.readShort();

        MapleMapObject mmo = map.getMapObject(objectid);
        if (mmo == null || mmo.getType() != MapleMapObjectType.MONSTER) {
            return;
        }
        MapleMonster monster = (MapleMonster) mmo;
        List<LifeMovementFragment> res;
        byte skillByte = slea.readByte();
        byte skill = slea.readByte();
        int skill_1 = slea.readByte() & 0xFF;
        byte skill_2 = slea.readByte();
        byte skill_3 = slea.readByte();
        byte skill_4 = slea.readByte();
        slea.read(8);
        MobSkill toUse = null;
        if (skillByte == 1 && monster.getNoSkills() > 0) {
            int random = Randomizer.nextInt(monster.getNoSkills());
            Pair<Integer, Integer> skillToUse = monster.getSkills().get(random);
            toUse = MobSkillFactory.getMobSkill(skillToUse.getLeft(), skillToUse.getRight());
            int percHpLeft = (monster.getHp() / monster.getMaxHp()) * 100;
            if (toUse.getHP() < percHpLeft || !monster.canUseSkill(toUse)) {
                toUse = null;
            }
        }
        if ((skill_1 >= 100 && skill_1 <= 200) && monster.hasSkill(skill_1, skill_2)) {
            MobSkill skillData = MobSkillFactory.getMobSkill(skill_1, skill_2);
            if (skillData != null && monster.canUseSkill(skillData)) {
                skillData.applyEffect(c.getPlayer(), monster, true, banishPlayers);
            }
        }
        slea.readByte();
        slea.readInt(); // whatever
        short start_x = slea.readShort(); // hmm.. startpos?
        short start_y = slea.readShort(); // hmm...
        Point startPos = new Point(start_x, start_y);
        res = parseMovement(slea);
        if (monster.getController() != c.getPlayer()) {
            if (monster.isAttackedBy(c.getPlayer())) {// aggro and controller change
                monster.switchController(c.getPlayer(), true);
            } else {
                return;
            }
        } else if (skill == -1 && monster.isControllerKnowsAboutAggro() && !monster.isMobile() && !monster.isFirstAttack()) {
            monster.setControllerHasAggro(false);
            monster.setControllerKnowsAboutAggro(false);
        }
        boolean aggro = monster.isControllerHasAggro();
        if (toUse != null) {
                c.announce(MaplePacketCreator.moveMonsterResponse(objectid, moveid, monster.getMp(), aggro, toUse.getSkillId(), toUse.getSkillLevel()));
        } else {
            c.announce(MaplePacketCreator.moveMonsterResponse(objectid, moveid, monster.getMp(), aggro));
        }
        if (aggro) {
            monster.setControllerKnowsAboutAggro(true);
        }
        if (res != null) {
            map.broadcastMessage(c.getPlayer(), MaplePacketCreator.moveMonster(skillByte, skill, skill_1, skill_2, skill_3, skill_4, objectid, startPos, res), monster.getPosition());
            updatePosition(res, monster, -1);
            map.moveMonster(monster, monster.getPosition());
        }

        for (MapleCharacter chr : banishPlayers) {
            chr.changeMapBanish(monster.getBanish().getMap(), monster.getBanish().getPortal(), monster.getBanish().getMsg());
        }
    }
}