Java tutorial
/* * 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 lineage2.gameserver.network.clientpackets; import java.util.ArrayList; import java.util.List; import lineage2.commons.math.SafeMath; import lineage2.gameserver.Config; import lineage2.gameserver.cache.Msg; import lineage2.gameserver.model.Creature; import lineage2.gameserver.model.Player; import lineage2.gameserver.model.instances.NpcInstance; import lineage2.gameserver.model.items.ItemInstance; import lineage2.gameserver.network.serverpackets.ExBuySellList; import lineage2.gameserver.network.serverpackets.components.SystemMsg; import lineage2.gameserver.utils.Log; import org.apache.commons.lang3.ArrayUtils; /** * @author Mobius * @version $Revision: 1.0 $ */ public class RequestExRefundItem extends L2GameClientPacket { /** * Field _listId. */ @SuppressWarnings("unused") private int _listId; /** * Field _count. */ private int _count; /** * Field _items. */ private int[] _items; /** * Method readImpl. */ @Override protected void readImpl() { _listId = readD(); _count = readD(); if (((_count * 4) > _buf.remaining()) || (_count > Short.MAX_VALUE) || (_count < 1)) { _count = 0; return; } _items = new int[_count]; for (int i = 0; i < _count; i++) { _items[i] = readD(); if (ArrayUtils.indexOf(_items, _items[i]) < i) { _count = 0; break; } } } /** * Method runImpl. */ @Override protected void runImpl() { Player activeChar = getClient().getActiveChar(); if ((activeChar == null) || (_count == 0)) { return; } if (activeChar.isActionsDisabled()) { activeChar.sendActionFailed(); return; } if (activeChar.isInStoreMode()) { activeChar.sendPacket( Msg.WHILE_OPERATING_A_PRIVATE_STORE_OR_WORKSHOP_YOU_CANNOT_DISCARD_DESTROY_OR_TRADE_AN_ITEM); return; } if (activeChar.isInTrade()) { activeChar.sendActionFailed(); return; } if (activeChar.isFishing()) { activeChar.sendPacket(Msg.YOU_CANNOT_DO_THAT_WHILE_FISHING); return; } if (!Config.ALT_GAME_KARMA_PLAYER_CAN_SHOP && (activeChar.getKarma() < 0) && !activeChar.isGM()) { activeChar.sendActionFailed(); return; } NpcInstance npc = activeChar.getLastNpc(); boolean isValidMerchant = (npc != null) && npc.isMerchantNpc(); if (!activeChar.isGM() && ((npc == null) || !isValidMerchant || !activeChar.isInRange(npc, Creature.INTERACTION_DISTANCE))) { activeChar.sendActionFailed(); return; } activeChar.getInventory().writeLock(); try { int slots = 0; long weight = 0; long totalPrice = 0; List<ItemInstance> refundList = new ArrayList<>(); for (int objId : _items) { ItemInstance item = activeChar.getRefund().getItemByObjectId(objId); if (item == null) { continue; } totalPrice = SafeMath.addAndCheck(totalPrice, SafeMath.mulAndCheck(item.getCount(), item.getReferencePrice()) / 2); weight = SafeMath.addAndCheck(weight, SafeMath.mulAndCheck(item.getCount(), item.getTemplate().getWeight())); if (!item.isStackable() || (activeChar.getInventory().getItemByItemId(item.getItemId()) == null)) { slots++; } refundList.add(item); } if (refundList.isEmpty()) { activeChar.sendPacket(SystemMsg.INCORRECT_ITEM_COUNT); activeChar.sendActionFailed(); return; } if (!activeChar.getInventory().validateWeight(weight)) { sendPacket(Msg.YOU_HAVE_EXCEEDED_THE_WEIGHT_LIMIT); activeChar.sendActionFailed(); return; } if (!activeChar.getInventory().validateCapacity(slots)) { sendPacket(Msg.YOUR_INVENTORY_IS_FULL); activeChar.sendActionFailed(); return; } if (!activeChar.reduceAdena(totalPrice)) { activeChar.sendPacket(Msg.YOU_DO_NOT_HAVE_ENOUGH_ADENA); activeChar.sendActionFailed(); return; } for (ItemInstance item : refundList) { ItemInstance refund = activeChar.getRefund().removeItem(item); Log.LogItem(activeChar, Log.RefundReturn, refund); activeChar.getInventory().addItem(refund); } } catch (ArithmeticException ae) { sendPacket(Msg.YOU_HAVE_EXCEEDED_THE_QUANTITY_THAT_CAN_BE_INPUTTED); return; } finally { activeChar.getInventory().writeUnlock(); } activeChar.sendPacket(new ExBuySellList.SellRefundList(activeChar, true)); activeChar.sendChanges(); } }