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-rw-r--r--src/game/TradeHandler.cpp1268
1 files changed, 634 insertions, 634 deletions
diff --git a/src/game/TradeHandler.cpp b/src/game/TradeHandler.cpp
index 4a4273c8750..a8abe3a8cf2 100644
--- a/src/game/TradeHandler.cpp
+++ b/src/game/TradeHandler.cpp
@@ -1,634 +1,634 @@
-/*
- * Copyright (C) 2005-2008 MaNGOS <http://www.mangosproject.org/>
- *
- * 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 2 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, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#include "Common.h"
-#include "WorldPacket.h"
-#include "WorldSession.h"
-#include "World.h"
-#include "ObjectAccessor.h"
-#include "Log.h"
-#include "Opcodes.h"
-#include "Player.h"
-#include "Item.h"
-#include "SocialMgr.h"
-#include "Language.h"
-
-enum TradeStatus
-{
- TRADE_STATUS_BUSY = 0,
- TRADE_STATUS_BEGIN_TRADE = 1,
- TRADE_STATUS_OPEN_WINDOW = 2,
- TRADE_STATUS_TRADE_CANCELED = 3,
- TRADE_STATUS_TRADE_ACCEPT = 4,
- TRADE_STATUS_BUSY_2 = 5,
- TRADE_STATUS_NO_TARGET = 6,
- TRADE_STATUS_BACK_TO_TRADE = 7,
- TRADE_STATUS_TRADE_COMPLETE = 8,
- // 9?
- TRADE_STATUS_TARGET_TO_FAR = 10,
- TRADE_STATUS_WRONG_FACTION = 11,
- TRADE_STATUS_CLOSE_WINDOW = 12,
- // 13?
- TRADE_STATUS_IGNORE_YOU = 14,
- TRADE_STATUS_YOU_STUNNED = 15,
- TRADE_STATUS_TARGET_STUNNED = 16,
- TRADE_STATUS_YOU_DEAD = 17,
- TRADE_STATUS_TARGET_DEAD = 18,
- TRADE_STATUS_YOU_LOGOUT = 19,
- TRADE_STATUS_TARGET_LOGOUT = 20,
- TRADE_STATUS_TRIAL_ACCOUNT = 21, // Trial accounts can not perform that action
- TRADE_STATUS_ONLY_CONJURED = 22 // You can only trade conjured items... (cross realm BG related).
-};
-
-void WorldSession::SendTradeStatus(uint32 status)
-{
- WorldPacket data;
-
- switch(status)
- {
- case TRADE_STATUS_BEGIN_TRADE:
- data.Initialize(SMSG_TRADE_STATUS, 4+8);
- data << uint32(status);
- data << uint64(0);
- break;
- case TRADE_STATUS_OPEN_WINDOW:
- data.Initialize(SMSG_TRADE_STATUS, 4+4);
- data << uint32(status);
- data << uint32(0); // added in 2.4.0
- break;
- case TRADE_STATUS_CLOSE_WINDOW:
- data.Initialize(SMSG_TRADE_STATUS, 4+4+1+4);
- data << uint32(status);
- data << uint32(0);
- data << uint8(0);
- data << uint32(0);
- break;
- case TRADE_STATUS_ONLY_CONJURED:
- data.Initialize(SMSG_TRADE_STATUS, 4+1);
- data << uint32(status);
- data << uint8(0);
- break;
- default:
- data.Initialize(SMSG_TRADE_STATUS, 4);
- data << uint32(status);
- break;
- }
-
- SendPacket(&data);
-}
-
-void WorldSession::HandleIgnoreTradeOpcode(WorldPacket& /*recvPacket*/)
-{
- sLog.outDebug( "WORLD: Ignore Trade %u",_player->GetGUIDLow());
- // recvPacket.print_storage();
-}
-
-void WorldSession::HandleBusyTradeOpcode(WorldPacket& /*recvPacket*/)
-{
- sLog.outDebug( "WORLD: Busy Trade %u",_player->GetGUIDLow());
- // recvPacket.print_storage();
-}
-
-void WorldSession::SendUpdateTrade()
-{
- Item *item = NULL;
-
- if( !_player || !_player->pTrader )
- return;
-
- // reset trade status
- if (_player->acceptTrade)
- {
- _player->acceptTrade = false;
- SendTradeStatus(TRADE_STATUS_BACK_TO_TRADE);
- }
-
- if (_player->pTrader->acceptTrade)
- {
- _player->pTrader->acceptTrade = false;
- _player->pTrader->GetSession()->SendTradeStatus(TRADE_STATUS_BACK_TO_TRADE);
- }
-
- WorldPacket data(SMSG_TRADE_STATUS_EXTENDED, (100)); // guess size
- data << (uint8 ) 1; // can be different (only seen 0 and 1)
- data << (uint32) 0; // added in 2.4.0, this value must be equal to value from TRADE_STATUS_OPEN_WINDOW status packet (different value for different players to block multiple trades?)
- data << (uint32) TRADE_SLOT_COUNT; // trade slots count/number?, = next field in most cases
- data << (uint32) TRADE_SLOT_COUNT; // trade slots count/number?, = prev field in most cases
- data << (uint32) _player->pTrader->tradeGold; // trader gold
- data << (uint32) 0; // spell casted on lowest slot item
-
- for(uint8 i = 0; i < TRADE_SLOT_COUNT; i++)
- {
- item = (_player->pTrader->tradeItems[i] != NULL_SLOT ? _player->pTrader->GetItemByPos( _player->pTrader->tradeItems[i] ) : NULL);
-
- data << (uint8) i; // trade slot number, if not specified, then end of packet
-
- if(item)
- {
- data << (uint32) item->GetProto()->ItemId; // entry
- // display id
- data << (uint32) item->GetProto()->DisplayInfoID;
- // stack count
- data << (uint32) item->GetUInt32Value(ITEM_FIELD_STACK_COUNT);
- data << (uint32) 0; // probably gift=1, created_by=0?
- // gift creator
- data << (uint64) item->GetUInt64Value(ITEM_FIELD_GIFTCREATOR);
- data << (uint32) item->GetEnchantmentId(PERM_ENCHANTMENT_SLOT);
- for(uint8 j = 0; j < 3; ++j)
- data << (uint32) 0; // enchantment id (permanent/gems?)
- // creator
- data << (uint64) item->GetUInt64Value(ITEM_FIELD_CREATOR);
- data << (uint32) item->GetSpellCharges(); // charges
- data << (uint32) item->GetItemSuffixFactor(); // SuffixFactor
- // random properties id
- data << (uint32) item->GetItemRandomPropertyId();
- data << (uint32) item->GetProto()->LockID; // lock id
- // max durability
- data << (uint32) item->GetUInt32Value(ITEM_FIELD_MAXDURABILITY);
- // durability
- data << (uint32) item->GetUInt32Value(ITEM_FIELD_DURABILITY);
- }
- else
- {
- for(uint8 j = 0; j < 18; j++)
- data << uint32(0);
- }
- }
- SendPacket(&data);
-}
-
-//==============================================================
-// transfer the items to the players
-
-void WorldSession::moveItems(Item* myItems[], Item* hisItems[])
-{
- for(int i=0; i<TRADE_SLOT_TRADED_COUNT; i++)
- {
- ItemPosCountVec traderDst;
- ItemPosCountVec playerDst;
- bool traderCanTrade = (myItems[i]==NULL || _player->pTrader->CanStoreItem( NULL_BAG, NULL_SLOT, traderDst, myItems[i], false ) == EQUIP_ERR_OK);
- bool playerCanTrade = (hisItems[i]==NULL || _player->CanStoreItem( NULL_BAG, NULL_SLOT, playerDst, hisItems[i], false ) == EQUIP_ERR_OK);
- if(traderCanTrade && playerCanTrade )
- {
- // Ok, if trade item exists and can be stored
- // If we trade in both directions we had to check, if the trade will work before we actually do it
- // A roll back is not possible after we stored it
- if(myItems[i])
- {
- // logging
- sLog.outDebug("partner storing: %u",myItems[i]->GetGUIDLow());
- if( _player->GetSession()->GetSecurity() > SEC_PLAYER && sWorld.getConfig(CONFIG_GM_LOG_TRADE) )
- sLog.outCommand("GM %s (Account: %u) trade: %s (Entry: %d Count: %u) to player: %s (Account: %u)",
- _player->GetName(),_player->GetSession()->GetAccountId(),
- myItems[i]->GetProto()->Name1,myItems[i]->GetEntry(),myItems[i]->GetCount(),
- _player->pTrader->GetName(),_player->pTrader->GetSession()->GetAccountId());
-
- // store
- _player->pTrader->MoveItemToInventory( traderDst, myItems[i], true, true);
- }
- if(hisItems[i])
- {
- // logging
- sLog.outDebug("player storing: %u",hisItems[i]->GetGUIDLow());
- if( _player->pTrader->GetSession()->GetSecurity() > SEC_PLAYER && sWorld.getConfig(CONFIG_GM_LOG_TRADE) )
- sLog.outCommand("GM %s (Account: %u) trade: %s (Entry: %d Count: %u) to player: %s (Account: %u)",
- _player->pTrader->GetName(),_player->pTrader->GetSession()->GetAccountId(),
- hisItems[i]->GetProto()->Name1,hisItems[i]->GetEntry(),hisItems[i]->GetCount(),
- _player->GetName(),_player->GetSession()->GetAccountId());
-
- // store
- _player->MoveItemToInventory( playerDst, hisItems[i], true, true);
- }
- }
- else
- {
- // in case of fatal error log error message
- // return the already removed items to the original owner
- if(myItems[i])
- {
- if(!traderCanTrade)
- sLog.outError("trader can't store item: %u",myItems[i]->GetGUIDLow());
- if(_player->CanStoreItem( NULL_BAG, NULL_SLOT, playerDst, myItems[i], false ) == EQUIP_ERR_OK)
- _player->MoveItemToInventory(playerDst, myItems[i], true, true);
- else
- sLog.outError("player can't take item back: %u",myItems[i]->GetGUIDLow());
- }
- // return the already removed items to the original owner
- if(hisItems[i])
- {
- if(!playerCanTrade)
- sLog.outError("player can't store item: %u",hisItems[i]->GetGUIDLow());
- if(_player->pTrader->CanStoreItem( NULL_BAG, NULL_SLOT, traderDst, hisItems[i], false ) == EQUIP_ERR_OK)
- _player->pTrader->MoveItemToInventory(traderDst, hisItems[i], true, true);
- else
- sLog.outError("trader can't take item back: %u",hisItems[i]->GetGUIDLow());
- }
- }
- }
-}
-
-//==============================================================
-
-void WorldSession::HandleAcceptTradeOpcode(WorldPacket& /*recvPacket*/)
-{
- Item *myItems[TRADE_SLOT_TRADED_COUNT] = { NULL, NULL, NULL, NULL, NULL, NULL };
- Item *hisItems[TRADE_SLOT_TRADED_COUNT] = { NULL, NULL, NULL, NULL, NULL, NULL };
- bool myCanCompleteTrade=true,hisCanCompleteTrade=true;
-
- if ( !GetPlayer()->pTrader )
- return;
-
- // not accept case incorrect money amount
- if( _player->tradeGold > _player->GetMoney() )
- {
- SendNotification(LANG_NOT_ENOUGH_GOLD);
- _player->pTrader->GetSession()->SendTradeStatus(TRADE_STATUS_BACK_TO_TRADE);
- _player->acceptTrade = false;
- return;
- }
-
- // not accept case incorrect money amount
- if( _player->pTrader->tradeGold > _player->pTrader->GetMoney() )
- {
- _player->pTrader->GetSession( )->SendNotification(LANG_NOT_ENOUGH_GOLD);
- SendTradeStatus(TRADE_STATUS_BACK_TO_TRADE);
- _player->pTrader->acceptTrade = false;
- return;
- }
-
- // not accept if some items now can't be trade (cheating)
- for(int i=0; i<TRADE_SLOT_TRADED_COUNT; i++)
- {
- if(_player->tradeItems[i] != NULL_SLOT )
- {
- if(Item* item =_player->GetItemByPos( _player->tradeItems[i] ))
- {
- if(!item->CanBeTraded())
- {
- SendTradeStatus(TRADE_STATUS_TRADE_CANCELED);
- return;
- }
- }
- }
- if(_player->pTrader->tradeItems[i] != NULL_SLOT)
- {
- if(Item* item =_player->pTrader->GetItemByPos( _player->pTrader->tradeItems[i]) )
- {
- if(!item->CanBeTraded())
- {
- SendTradeStatus(TRADE_STATUS_TRADE_CANCELED);
- return;
- }
- }
- }
- }
-
- _player->acceptTrade = true;
- if (_player->pTrader->acceptTrade )
- {
- // inform partner client
- _player->pTrader->GetSession()->SendTradeStatus(TRADE_STATUS_TRADE_ACCEPT);
-
- // store items in local list and set 'in-trade' flag
- for(int i=0; i<TRADE_SLOT_TRADED_COUNT; i++)
- {
- if(_player->tradeItems[i] != NULL_SLOT )
- {
- sLog.outDebug("player trade item bag: %u slot: %u",_player->tradeItems[i] >> 8, _player->tradeItems[i] & 255 );
- //Can return NULL
- myItems[i]=_player->GetItemByPos( _player->tradeItems[i] );
- if (myItems[i])
- myItems[i]->SetInTrade();
- }
- if(_player->pTrader->tradeItems[i] != NULL_SLOT)
- {
- sLog.outDebug("partner trade item bag: %u slot: %u",_player->pTrader->tradeItems[i] >> 8,_player->pTrader->tradeItems[i] & 255);
- //Can return NULL
- hisItems[i]=_player->pTrader->GetItemByPos( _player->pTrader->tradeItems[i]);
- if(hisItems[i])
- hisItems[i]->SetInTrade();
- }
- }
-
- // test if item will fit in each inventory
- hisCanCompleteTrade = (_player->pTrader->CanStoreItems( myItems,TRADE_SLOT_TRADED_COUNT )== EQUIP_ERR_OK);
- myCanCompleteTrade = (_player->CanStoreItems( hisItems,TRADE_SLOT_TRADED_COUNT ) == EQUIP_ERR_OK);
-
- // clear 'in-trade' flag
- for(int i=0; i<TRADE_SLOT_TRADED_COUNT; i++)
- {
- if(myItems[i]) myItems[i]->SetInTrade(false);
- if(hisItems[i]) hisItems[i]->SetInTrade(false);
- }
-
- // in case of missing space report error
- if(!myCanCompleteTrade)
- {
- SendNotification(LANG_NOT_FREE_TRADE_SLOTS);
- GetPlayer( )->pTrader->GetSession( )->SendNotification(LANG_NOT_PARTNER_FREE_TRADE_SLOTS);
- SendTradeStatus(TRADE_STATUS_BACK_TO_TRADE);
- _player->pTrader->GetSession()->SendTradeStatus(TRADE_STATUS_BACK_TO_TRADE);
- return;
- }
- else if (!hisCanCompleteTrade)
- {
- SendNotification(LANG_NOT_PARTNER_FREE_TRADE_SLOTS);
- GetPlayer()->pTrader->GetSession()->SendNotification(LANG_NOT_FREE_TRADE_SLOTS);
- SendTradeStatus(TRADE_STATUS_BACK_TO_TRADE);
- _player->pTrader->GetSession()->SendTradeStatus(TRADE_STATUS_BACK_TO_TRADE);
- return;
- }
-
- // execute trade: 1. remove
- for(int i=0; i<TRADE_SLOT_TRADED_COUNT; i++)
- {
- if(myItems[i])
- {
- myItems[i]->SetUInt64Value( ITEM_FIELD_GIFTCREATOR,_player->GetGUID());
- _player->MoveItemFromInventory(_player->tradeItems[i] >> 8, _player->tradeItems[i] & 255, true);
- }
- if(hisItems[i])
- {
- hisItems[i]->SetUInt64Value( ITEM_FIELD_GIFTCREATOR,_player->pTrader->GetGUID());
- _player->pTrader->MoveItemFromInventory(_player->pTrader->tradeItems[i] >> 8, _player->pTrader->tradeItems[i] & 255, true);
- }
- }
-
- // execute trade: 2. store
- moveItems(myItems, hisItems);
-
- // logging money
- if(sWorld.getConfig(CONFIG_GM_LOG_TRADE))
- {
- if( _player->GetSession()->GetSecurity() > SEC_PLAYER && _player->tradeGold > 0)
- sLog.outCommand("GM %s (Account: %u) give money (Amount: %u) to player: %s (Account: %u)",
- _player->GetName(),_player->GetSession()->GetAccountId(),
- _player->tradeGold,
- _player->pTrader->GetName(),_player->pTrader->GetSession()->GetAccountId());
- if( _player->pTrader->GetSession()->GetSecurity() > SEC_PLAYER && _player->pTrader->tradeGold > 0)
- sLog.outCommand("GM %s (Account: %u) give money (Amount: %u) to player: %s (Account: %u)",
- _player->pTrader->GetName(),_player->pTrader->GetSession()->GetAccountId(),
- _player->pTrader->tradeGold,
- _player->GetName(),_player->GetSession()->GetAccountId());
- }
-
- // update money
- _player->ModifyMoney( -int32(_player->tradeGold) );
- _player->ModifyMoney(_player->pTrader->tradeGold );
- _player->pTrader->ModifyMoney( -int32(_player->pTrader->tradeGold) );
- _player->pTrader->ModifyMoney(_player->tradeGold );
-
- _player->ClearTrade();
- _player->pTrader->ClearTrade();
-
- // desynchronized with the other saves here (SaveInventoryAndGoldToDB() not have own transaction guards)
- CharacterDatabase.BeginTransaction();
- _player->SaveInventoryAndGoldToDB();
- _player->pTrader->SaveInventoryAndGoldToDB();
- CharacterDatabase.CommitTransaction();
-
- _player->pTrader->GetSession()->SendTradeStatus(TRADE_STATUS_TRADE_COMPLETE);
- SendTradeStatus(TRADE_STATUS_TRADE_COMPLETE);
-
- _player->pTrader->pTrader = NULL;
- _player->pTrader = NULL;
- }
- else
- {
- _player->pTrader->GetSession()->SendTradeStatus(TRADE_STATUS_TRADE_ACCEPT);
- }
-}
-
-void WorldSession::HandleUnacceptTradeOpcode(WorldPacket& /*recvPacket*/)
-{
- if ( !GetPlayer()->pTrader )
- return;
-
- _player->pTrader->GetSession()->SendTradeStatus(TRADE_STATUS_BACK_TO_TRADE);
- _player->acceptTrade = false;
-}
-
-void WorldSession::HandleBeginTradeOpcode(WorldPacket& /*recvPacket*/)
-{
- if(!_player->pTrader)
- return;
-
- _player->pTrader->GetSession()->SendTradeStatus(TRADE_STATUS_OPEN_WINDOW);
- _player->pTrader->ClearTrade();
-
- SendTradeStatus(TRADE_STATUS_OPEN_WINDOW);
- _player->ClearTrade();
-}
-
-void WorldSession::SendCancelTrade()
-{
- SendTradeStatus(TRADE_STATUS_TRADE_CANCELED);
-}
-
-void WorldSession::HandleCancelTradeOpcode(WorldPacket& /*recvPacket*/)
-{
- // sended also after LOGOUT COMPLETE
- if(_player) // needed because STATUS_AUTHED
- _player->TradeCancel(true);
-}
-
-void WorldSession::HandleInitiateTradeOpcode(WorldPacket& recvPacket)
-{
- CHECK_PACKET_SIZE(recvPacket,8);
-
- if( GetPlayer()->pTrader )
- return;
-
- uint64 ID;
-
- if( !GetPlayer()->isAlive() )
- {
- SendTradeStatus(TRADE_STATUS_YOU_DEAD);
- return;
- }
-
- if( GetPlayer()->hasUnitState(UNIT_STAT_STUNNED) )
- {
- SendTradeStatus(TRADE_STATUS_YOU_STUNNED);
- return;
- }
-
- if( isLogingOut() )
- {
- SendTradeStatus(TRADE_STATUS_YOU_LOGOUT);
- return;
- }
-
- if( GetPlayer()->isInFlight() )
- {
- SendTradeStatus(TRADE_STATUS_TARGET_TO_FAR);
- return;
- }
-
- recvPacket >> ID;
-
- Player* pOther = ObjectAccessor::FindPlayer( ID );
-
- if( !pOther )
- {
- SendTradeStatus(TRADE_STATUS_NO_TARGET);
- return;
- }
-
- if( pOther == GetPlayer() || pOther->pTrader )
- {
- SendTradeStatus(TRADE_STATUS_BUSY);
- return;
- }
-
- if( !pOther->isAlive() )
- {
- SendTradeStatus(TRADE_STATUS_TARGET_DEAD);
- return;
- }
-
- if( pOther->isInFlight() )
- {
- SendTradeStatus(TRADE_STATUS_TARGET_TO_FAR);
- return;
- }
-
- if( pOther->hasUnitState(UNIT_STAT_STUNNED) )
- {
- SendTradeStatus(TRADE_STATUS_TARGET_STUNNED);
- return;
- }
-
- if( pOther->GetSession()->isLogingOut() )
- {
- SendTradeStatus(TRADE_STATUS_TARGET_LOGOUT);
- return;
- }
-
- if( pOther->GetSocial()->HasIgnore(GetPlayer()->GetGUIDLow()) )
- {
- SendTradeStatus(TRADE_STATUS_IGNORE_YOU);
- return;
- }
-
- if(pOther->GetTeam() !=_player->GetTeam() )
- {
- SendTradeStatus(TRADE_STATUS_WRONG_FACTION);
- return;
- }
-
- if( pOther->GetDistance2d( _player ) > 10.0f )
- {
- SendTradeStatus(TRADE_STATUS_TARGET_TO_FAR);
- return;
- }
-
- // OK start trade
- _player->pTrader = pOther;
- pOther->pTrader =_player;
-
- WorldPacket data(SMSG_TRADE_STATUS, 12);
- data << (uint32) TRADE_STATUS_BEGIN_TRADE;
- data << (uint64)_player->GetGUID();
- _player->pTrader->GetSession()->SendPacket(&data);
-}
-
-void WorldSession::HandleSetTradeGoldOpcode(WorldPacket& recvPacket)
-{
- CHECK_PACKET_SIZE(recvPacket,4);
-
- if(!_player->pTrader)
- return;
-
- uint32 gold;
-
- recvPacket >> gold;
-
- // gold can be incorrect, but this is checked at trade finished.
- _player->tradeGold = gold;
-
- _player->pTrader->GetSession()->SendUpdateTrade();
-}
-
-void WorldSession::HandleSetTradeItemOpcode(WorldPacket& recvPacket)
-{
- CHECK_PACKET_SIZE(recvPacket,1+1+1);
-
- if(!_player->pTrader)
- return;
-
- // send update
- uint8 tradeSlot;
- uint8 bag;
- uint8 slot;
-
- recvPacket >> tradeSlot;
- recvPacket >> bag;
- recvPacket >> slot;
-
- // invalid slot number
- if(tradeSlot >= TRADE_SLOT_COUNT)
- {
- SendTradeStatus(TRADE_STATUS_TRADE_CANCELED);
- return;
- }
-
- // check cheating, can't fail with correct client operations
- Item* item = _player->GetItemByPos(bag,slot);
- if(!item || tradeSlot!=TRADE_SLOT_NONTRADED && !item->CanBeTraded())
- {
- SendTradeStatus(TRADE_STATUS_TRADE_CANCELED);
- return;
- }
-
- uint16 pos = (bag << 8) | slot;
-
- // prevent place single item into many trade slots using cheating and client bugs
- for(int i = 0; i < TRADE_SLOT_COUNT; ++i)
- {
- if(_player->tradeItems[i]==pos)
- {
- // cheating attempt
- SendTradeStatus(TRADE_STATUS_TRADE_CANCELED);
- return;
- }
- }
-
- _player->tradeItems[tradeSlot] = pos;
-
- _player->pTrader->GetSession()->SendUpdateTrade();
-}
-
-void WorldSession::HandleClearTradeItemOpcode(WorldPacket& recvPacket)
-{
- CHECK_PACKET_SIZE(recvPacket,1);
-
- if(!_player->pTrader)
- return;
-
- uint8 tradeSlot;
- recvPacket >> tradeSlot;
-
- // invalid slot number
- if(tradeSlot >= TRADE_SLOT_COUNT)
- return;
-
- _player->tradeItems[tradeSlot] = NULL_SLOT;
-
- _player->pTrader->GetSession()->SendUpdateTrade();
-}
+/*
+ * Copyright (C) 2005-2008 MaNGOS <http://www.mangosproject.org/>
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "Common.h"
+#include "WorldPacket.h"
+#include "WorldSession.h"
+#include "World.h"
+#include "ObjectAccessor.h"
+#include "Log.h"
+#include "Opcodes.h"
+#include "Player.h"
+#include "Item.h"
+#include "SocialMgr.h"
+#include "Language.h"
+
+enum TradeStatus
+{
+ TRADE_STATUS_BUSY = 0,
+ TRADE_STATUS_BEGIN_TRADE = 1,
+ TRADE_STATUS_OPEN_WINDOW = 2,
+ TRADE_STATUS_TRADE_CANCELED = 3,
+ TRADE_STATUS_TRADE_ACCEPT = 4,
+ TRADE_STATUS_BUSY_2 = 5,
+ TRADE_STATUS_NO_TARGET = 6,
+ TRADE_STATUS_BACK_TO_TRADE = 7,
+ TRADE_STATUS_TRADE_COMPLETE = 8,
+ // 9?
+ TRADE_STATUS_TARGET_TO_FAR = 10,
+ TRADE_STATUS_WRONG_FACTION = 11,
+ TRADE_STATUS_CLOSE_WINDOW = 12,
+ // 13?
+ TRADE_STATUS_IGNORE_YOU = 14,
+ TRADE_STATUS_YOU_STUNNED = 15,
+ TRADE_STATUS_TARGET_STUNNED = 16,
+ TRADE_STATUS_YOU_DEAD = 17,
+ TRADE_STATUS_TARGET_DEAD = 18,
+ TRADE_STATUS_YOU_LOGOUT = 19,
+ TRADE_STATUS_TARGET_LOGOUT = 20,
+ TRADE_STATUS_TRIAL_ACCOUNT = 21, // Trial accounts can not perform that action
+ TRADE_STATUS_ONLY_CONJURED = 22 // You can only trade conjured items... (cross realm BG related).
+};
+
+void WorldSession::SendTradeStatus(uint32 status)
+{
+ WorldPacket data;
+
+ switch(status)
+ {
+ case TRADE_STATUS_BEGIN_TRADE:
+ data.Initialize(SMSG_TRADE_STATUS, 4+8);
+ data << uint32(status);
+ data << uint64(0);
+ break;
+ case TRADE_STATUS_OPEN_WINDOW:
+ data.Initialize(SMSG_TRADE_STATUS, 4+4);
+ data << uint32(status);
+ data << uint32(0); // added in 2.4.0
+ break;
+ case TRADE_STATUS_CLOSE_WINDOW:
+ data.Initialize(SMSG_TRADE_STATUS, 4+4+1+4);
+ data << uint32(status);
+ data << uint32(0);
+ data << uint8(0);
+ data << uint32(0);
+ break;
+ case TRADE_STATUS_ONLY_CONJURED:
+ data.Initialize(SMSG_TRADE_STATUS, 4+1);
+ data << uint32(status);
+ data << uint8(0);
+ break;
+ default:
+ data.Initialize(SMSG_TRADE_STATUS, 4);
+ data << uint32(status);
+ break;
+ }
+
+ SendPacket(&data);
+}
+
+void WorldSession::HandleIgnoreTradeOpcode(WorldPacket& /*recvPacket*/)
+{
+ sLog.outDebug( "WORLD: Ignore Trade %u",_player->GetGUIDLow());
+ // recvPacket.print_storage();
+}
+
+void WorldSession::HandleBusyTradeOpcode(WorldPacket& /*recvPacket*/)
+{
+ sLog.outDebug( "WORLD: Busy Trade %u",_player->GetGUIDLow());
+ // recvPacket.print_storage();
+}
+
+void WorldSession::SendUpdateTrade()
+{
+ Item *item = NULL;
+
+ if( !_player || !_player->pTrader )
+ return;
+
+ // reset trade status
+ if (_player->acceptTrade)
+ {
+ _player->acceptTrade = false;
+ SendTradeStatus(TRADE_STATUS_BACK_TO_TRADE);
+ }
+
+ if (_player->pTrader->acceptTrade)
+ {
+ _player->pTrader->acceptTrade = false;
+ _player->pTrader->GetSession()->SendTradeStatus(TRADE_STATUS_BACK_TO_TRADE);
+ }
+
+ WorldPacket data(SMSG_TRADE_STATUS_EXTENDED, (100)); // guess size
+ data << (uint8 ) 1; // can be different (only seen 0 and 1)
+ data << (uint32) 0; // added in 2.4.0, this value must be equal to value from TRADE_STATUS_OPEN_WINDOW status packet (different value for different players to block multiple trades?)
+ data << (uint32) TRADE_SLOT_COUNT; // trade slots count/number?, = next field in most cases
+ data << (uint32) TRADE_SLOT_COUNT; // trade slots count/number?, = prev field in most cases
+ data << (uint32) _player->pTrader->tradeGold; // trader gold
+ data << (uint32) 0; // spell casted on lowest slot item
+
+ for(uint8 i = 0; i < TRADE_SLOT_COUNT; i++)
+ {
+ item = (_player->pTrader->tradeItems[i] != NULL_SLOT ? _player->pTrader->GetItemByPos( _player->pTrader->tradeItems[i] ) : NULL);
+
+ data << (uint8) i; // trade slot number, if not specified, then end of packet
+
+ if(item)
+ {
+ data << (uint32) item->GetProto()->ItemId; // entry
+ // display id
+ data << (uint32) item->GetProto()->DisplayInfoID;
+ // stack count
+ data << (uint32) item->GetUInt32Value(ITEM_FIELD_STACK_COUNT);
+ data << (uint32) 0; // probably gift=1, created_by=0?
+ // gift creator
+ data << (uint64) item->GetUInt64Value(ITEM_FIELD_GIFTCREATOR);
+ data << (uint32) item->GetEnchantmentId(PERM_ENCHANTMENT_SLOT);
+ for(uint8 j = 0; j < 3; ++j)
+ data << (uint32) 0; // enchantment id (permanent/gems?)
+ // creator
+ data << (uint64) item->GetUInt64Value(ITEM_FIELD_CREATOR);
+ data << (uint32) item->GetSpellCharges(); // charges
+ data << (uint32) item->GetItemSuffixFactor(); // SuffixFactor
+ // random properties id
+ data << (uint32) item->GetItemRandomPropertyId();
+ data << (uint32) item->GetProto()->LockID; // lock id
+ // max durability
+ data << (uint32) item->GetUInt32Value(ITEM_FIELD_MAXDURABILITY);
+ // durability
+ data << (uint32) item->GetUInt32Value(ITEM_FIELD_DURABILITY);
+ }
+ else
+ {
+ for(uint8 j = 0; j < 18; j++)
+ data << uint32(0);
+ }
+ }
+ SendPacket(&data);
+}
+
+//==============================================================
+// transfer the items to the players
+
+void WorldSession::moveItems(Item* myItems[], Item* hisItems[])
+{
+ for(int i=0; i<TRADE_SLOT_TRADED_COUNT; i++)
+ {
+ ItemPosCountVec traderDst;
+ ItemPosCountVec playerDst;
+ bool traderCanTrade = (myItems[i]==NULL || _player->pTrader->CanStoreItem( NULL_BAG, NULL_SLOT, traderDst, myItems[i], false ) == EQUIP_ERR_OK);
+ bool playerCanTrade = (hisItems[i]==NULL || _player->CanStoreItem( NULL_BAG, NULL_SLOT, playerDst, hisItems[i], false ) == EQUIP_ERR_OK);
+ if(traderCanTrade && playerCanTrade )
+ {
+ // Ok, if trade item exists and can be stored
+ // If we trade in both directions we had to check, if the trade will work before we actually do it
+ // A roll back is not possible after we stored it
+ if(myItems[i])
+ {
+ // logging
+ sLog.outDebug("partner storing: %u",myItems[i]->GetGUIDLow());
+ if( _player->GetSession()->GetSecurity() > SEC_PLAYER && sWorld.getConfig(CONFIG_GM_LOG_TRADE) )
+ sLog.outCommand("GM %s (Account: %u) trade: %s (Entry: %d Count: %u) to player: %s (Account: %u)",
+ _player->GetName(),_player->GetSession()->GetAccountId(),
+ myItems[i]->GetProto()->Name1,myItems[i]->GetEntry(),myItems[i]->GetCount(),
+ _player->pTrader->GetName(),_player->pTrader->GetSession()->GetAccountId());
+
+ // store
+ _player->pTrader->MoveItemToInventory( traderDst, myItems[i], true, true);
+ }
+ if(hisItems[i])
+ {
+ // logging
+ sLog.outDebug("player storing: %u",hisItems[i]->GetGUIDLow());
+ if( _player->pTrader->GetSession()->GetSecurity() > SEC_PLAYER && sWorld.getConfig(CONFIG_GM_LOG_TRADE) )
+ sLog.outCommand("GM %s (Account: %u) trade: %s (Entry: %d Count: %u) to player: %s (Account: %u)",
+ _player->pTrader->GetName(),_player->pTrader->GetSession()->GetAccountId(),
+ hisItems[i]->GetProto()->Name1,hisItems[i]->GetEntry(),hisItems[i]->GetCount(),
+ _player->GetName(),_player->GetSession()->GetAccountId());
+
+ // store
+ _player->MoveItemToInventory( playerDst, hisItems[i], true, true);
+ }
+ }
+ else
+ {
+ // in case of fatal error log error message
+ // return the already removed items to the original owner
+ if(myItems[i])
+ {
+ if(!traderCanTrade)
+ sLog.outError("trader can't store item: %u",myItems[i]->GetGUIDLow());
+ if(_player->CanStoreItem( NULL_BAG, NULL_SLOT, playerDst, myItems[i], false ) == EQUIP_ERR_OK)
+ _player->MoveItemToInventory(playerDst, myItems[i], true, true);
+ else
+ sLog.outError("player can't take item back: %u",myItems[i]->GetGUIDLow());
+ }
+ // return the already removed items to the original owner
+ if(hisItems[i])
+ {
+ if(!playerCanTrade)
+ sLog.outError("player can't store item: %u",hisItems[i]->GetGUIDLow());
+ if(_player->pTrader->CanStoreItem( NULL_BAG, NULL_SLOT, traderDst, hisItems[i], false ) == EQUIP_ERR_OK)
+ _player->pTrader->MoveItemToInventory(traderDst, hisItems[i], true, true);
+ else
+ sLog.outError("trader can't take item back: %u",hisItems[i]->GetGUIDLow());
+ }
+ }
+ }
+}
+
+//==============================================================
+
+void WorldSession::HandleAcceptTradeOpcode(WorldPacket& /*recvPacket*/)
+{
+ Item *myItems[TRADE_SLOT_TRADED_COUNT] = { NULL, NULL, NULL, NULL, NULL, NULL };
+ Item *hisItems[TRADE_SLOT_TRADED_COUNT] = { NULL, NULL, NULL, NULL, NULL, NULL };
+ bool myCanCompleteTrade=true,hisCanCompleteTrade=true;
+
+ if ( !GetPlayer()->pTrader )
+ return;
+
+ // not accept case incorrect money amount
+ if( _player->tradeGold > _player->GetMoney() )
+ {
+ SendNotification(LANG_NOT_ENOUGH_GOLD);
+ _player->pTrader->GetSession()->SendTradeStatus(TRADE_STATUS_BACK_TO_TRADE);
+ _player->acceptTrade = false;
+ return;
+ }
+
+ // not accept case incorrect money amount
+ if( _player->pTrader->tradeGold > _player->pTrader->GetMoney() )
+ {
+ _player->pTrader->GetSession( )->SendNotification(LANG_NOT_ENOUGH_GOLD);
+ SendTradeStatus(TRADE_STATUS_BACK_TO_TRADE);
+ _player->pTrader->acceptTrade = false;
+ return;
+ }
+
+ // not accept if some items now can't be trade (cheating)
+ for(int i=0; i<TRADE_SLOT_TRADED_COUNT; i++)
+ {
+ if(_player->tradeItems[i] != NULL_SLOT )
+ {
+ if(Item* item =_player->GetItemByPos( _player->tradeItems[i] ))
+ {
+ if(!item->CanBeTraded())
+ {
+ SendTradeStatus(TRADE_STATUS_TRADE_CANCELED);
+ return;
+ }
+ }
+ }
+ if(_player->pTrader->tradeItems[i] != NULL_SLOT)
+ {
+ if(Item* item =_player->pTrader->GetItemByPos( _player->pTrader->tradeItems[i]) )
+ {
+ if(!item->CanBeTraded())
+ {
+ SendTradeStatus(TRADE_STATUS_TRADE_CANCELED);
+ return;
+ }
+ }
+ }
+ }
+
+ _player->acceptTrade = true;
+ if (_player->pTrader->acceptTrade )
+ {
+ // inform partner client
+ _player->pTrader->GetSession()->SendTradeStatus(TRADE_STATUS_TRADE_ACCEPT);
+
+ // store items in local list and set 'in-trade' flag
+ for(int i=0; i<TRADE_SLOT_TRADED_COUNT; i++)
+ {
+ if(_player->tradeItems[i] != NULL_SLOT )
+ {
+ sLog.outDebug("player trade item bag: %u slot: %u",_player->tradeItems[i] >> 8, _player->tradeItems[i] & 255 );
+ //Can return NULL
+ myItems[i]=_player->GetItemByPos( _player->tradeItems[i] );
+ if (myItems[i])
+ myItems[i]->SetInTrade();
+ }
+ if(_player->pTrader->tradeItems[i] != NULL_SLOT)
+ {
+ sLog.outDebug("partner trade item bag: %u slot: %u",_player->pTrader->tradeItems[i] >> 8,_player->pTrader->tradeItems[i] & 255);
+ //Can return NULL
+ hisItems[i]=_player->pTrader->GetItemByPos( _player->pTrader->tradeItems[i]);
+ if(hisItems[i])
+ hisItems[i]->SetInTrade();
+ }
+ }
+
+ // test if item will fit in each inventory
+ hisCanCompleteTrade = (_player->pTrader->CanStoreItems( myItems,TRADE_SLOT_TRADED_COUNT )== EQUIP_ERR_OK);
+ myCanCompleteTrade = (_player->CanStoreItems( hisItems,TRADE_SLOT_TRADED_COUNT ) == EQUIP_ERR_OK);
+
+ // clear 'in-trade' flag
+ for(int i=0; i<TRADE_SLOT_TRADED_COUNT; i++)
+ {
+ if(myItems[i]) myItems[i]->SetInTrade(false);
+ if(hisItems[i]) hisItems[i]->SetInTrade(false);
+ }
+
+ // in case of missing space report error
+ if(!myCanCompleteTrade)
+ {
+ SendNotification(LANG_NOT_FREE_TRADE_SLOTS);
+ GetPlayer( )->pTrader->GetSession( )->SendNotification(LANG_NOT_PARTNER_FREE_TRADE_SLOTS);
+ SendTradeStatus(TRADE_STATUS_BACK_TO_TRADE);
+ _player->pTrader->GetSession()->SendTradeStatus(TRADE_STATUS_BACK_TO_TRADE);
+ return;
+ }
+ else if (!hisCanCompleteTrade)
+ {
+ SendNotification(LANG_NOT_PARTNER_FREE_TRADE_SLOTS);
+ GetPlayer()->pTrader->GetSession()->SendNotification(LANG_NOT_FREE_TRADE_SLOTS);
+ SendTradeStatus(TRADE_STATUS_BACK_TO_TRADE);
+ _player->pTrader->GetSession()->SendTradeStatus(TRADE_STATUS_BACK_TO_TRADE);
+ return;
+ }
+
+ // execute trade: 1. remove
+ for(int i=0; i<TRADE_SLOT_TRADED_COUNT; i++)
+ {
+ if(myItems[i])
+ {
+ myItems[i]->SetUInt64Value( ITEM_FIELD_GIFTCREATOR,_player->GetGUID());
+ _player->MoveItemFromInventory(_player->tradeItems[i] >> 8, _player->tradeItems[i] & 255, true);
+ }
+ if(hisItems[i])
+ {
+ hisItems[i]->SetUInt64Value( ITEM_FIELD_GIFTCREATOR,_player->pTrader->GetGUID());
+ _player->pTrader->MoveItemFromInventory(_player->pTrader->tradeItems[i] >> 8, _player->pTrader->tradeItems[i] & 255, true);
+ }
+ }
+
+ // execute trade: 2. store
+ moveItems(myItems, hisItems);
+
+ // logging money
+ if(sWorld.getConfig(CONFIG_GM_LOG_TRADE))
+ {
+ if( _player->GetSession()->GetSecurity() > SEC_PLAYER && _player->tradeGold > 0)
+ sLog.outCommand("GM %s (Account: %u) give money (Amount: %u) to player: %s (Account: %u)",
+ _player->GetName(),_player->GetSession()->GetAccountId(),
+ _player->tradeGold,
+ _player->pTrader->GetName(),_player->pTrader->GetSession()->GetAccountId());
+ if( _player->pTrader->GetSession()->GetSecurity() > SEC_PLAYER && _player->pTrader->tradeGold > 0)
+ sLog.outCommand("GM %s (Account: %u) give money (Amount: %u) to player: %s (Account: %u)",
+ _player->pTrader->GetName(),_player->pTrader->GetSession()->GetAccountId(),
+ _player->pTrader->tradeGold,
+ _player->GetName(),_player->GetSession()->GetAccountId());
+ }
+
+ // update money
+ _player->ModifyMoney( -int32(_player->tradeGold) );
+ _player->ModifyMoney(_player->pTrader->tradeGold );
+ _player->pTrader->ModifyMoney( -int32(_player->pTrader->tradeGold) );
+ _player->pTrader->ModifyMoney(_player->tradeGold );
+
+ _player->ClearTrade();
+ _player->pTrader->ClearTrade();
+
+ // desynchronized with the other saves here (SaveInventoryAndGoldToDB() not have own transaction guards)
+ CharacterDatabase.BeginTransaction();
+ _player->SaveInventoryAndGoldToDB();
+ _player->pTrader->SaveInventoryAndGoldToDB();
+ CharacterDatabase.CommitTransaction();
+
+ _player->pTrader->GetSession()->SendTradeStatus(TRADE_STATUS_TRADE_COMPLETE);
+ SendTradeStatus(TRADE_STATUS_TRADE_COMPLETE);
+
+ _player->pTrader->pTrader = NULL;
+ _player->pTrader = NULL;
+ }
+ else
+ {
+ _player->pTrader->GetSession()->SendTradeStatus(TRADE_STATUS_TRADE_ACCEPT);
+ }
+}
+
+void WorldSession::HandleUnacceptTradeOpcode(WorldPacket& /*recvPacket*/)
+{
+ if ( !GetPlayer()->pTrader )
+ return;
+
+ _player->pTrader->GetSession()->SendTradeStatus(TRADE_STATUS_BACK_TO_TRADE);
+ _player->acceptTrade = false;
+}
+
+void WorldSession::HandleBeginTradeOpcode(WorldPacket& /*recvPacket*/)
+{
+ if(!_player->pTrader)
+ return;
+
+ _player->pTrader->GetSession()->SendTradeStatus(TRADE_STATUS_OPEN_WINDOW);
+ _player->pTrader->ClearTrade();
+
+ SendTradeStatus(TRADE_STATUS_OPEN_WINDOW);
+ _player->ClearTrade();
+}
+
+void WorldSession::SendCancelTrade()
+{
+ SendTradeStatus(TRADE_STATUS_TRADE_CANCELED);
+}
+
+void WorldSession::HandleCancelTradeOpcode(WorldPacket& /*recvPacket*/)
+{
+ // sended also after LOGOUT COMPLETE
+ if(_player) // needed because STATUS_AUTHED
+ _player->TradeCancel(true);
+}
+
+void WorldSession::HandleInitiateTradeOpcode(WorldPacket& recvPacket)
+{
+ CHECK_PACKET_SIZE(recvPacket,8);
+
+ if( GetPlayer()->pTrader )
+ return;
+
+ uint64 ID;
+
+ if( !GetPlayer()->isAlive() )
+ {
+ SendTradeStatus(TRADE_STATUS_YOU_DEAD);
+ return;
+ }
+
+ if( GetPlayer()->hasUnitState(UNIT_STAT_STUNNED) )
+ {
+ SendTradeStatus(TRADE_STATUS_YOU_STUNNED);
+ return;
+ }
+
+ if( isLogingOut() )
+ {
+ SendTradeStatus(TRADE_STATUS_YOU_LOGOUT);
+ return;
+ }
+
+ if( GetPlayer()->isInFlight() )
+ {
+ SendTradeStatus(TRADE_STATUS_TARGET_TO_FAR);
+ return;
+ }
+
+ recvPacket >> ID;
+
+ Player* pOther = ObjectAccessor::FindPlayer( ID );
+
+ if( !pOther )
+ {
+ SendTradeStatus(TRADE_STATUS_NO_TARGET);
+ return;
+ }
+
+ if( pOther == GetPlayer() || pOther->pTrader )
+ {
+ SendTradeStatus(TRADE_STATUS_BUSY);
+ return;
+ }
+
+ if( !pOther->isAlive() )
+ {
+ SendTradeStatus(TRADE_STATUS_TARGET_DEAD);
+ return;
+ }
+
+ if( pOther->isInFlight() )
+ {
+ SendTradeStatus(TRADE_STATUS_TARGET_TO_FAR);
+ return;
+ }
+
+ if( pOther->hasUnitState(UNIT_STAT_STUNNED) )
+ {
+ SendTradeStatus(TRADE_STATUS_TARGET_STUNNED);
+ return;
+ }
+
+ if( pOther->GetSession()->isLogingOut() )
+ {
+ SendTradeStatus(TRADE_STATUS_TARGET_LOGOUT);
+ return;
+ }
+
+ if( pOther->GetSocial()->HasIgnore(GetPlayer()->GetGUIDLow()) )
+ {
+ SendTradeStatus(TRADE_STATUS_IGNORE_YOU);
+ return;
+ }
+
+ if(pOther->GetTeam() !=_player->GetTeam() )
+ {
+ SendTradeStatus(TRADE_STATUS_WRONG_FACTION);
+ return;
+ }
+
+ if( pOther->GetDistance2d( _player ) > 10.0f )
+ {
+ SendTradeStatus(TRADE_STATUS_TARGET_TO_FAR);
+ return;
+ }
+
+ // OK start trade
+ _player->pTrader = pOther;
+ pOther->pTrader =_player;
+
+ WorldPacket data(SMSG_TRADE_STATUS, 12);
+ data << (uint32) TRADE_STATUS_BEGIN_TRADE;
+ data << (uint64)_player->GetGUID();
+ _player->pTrader->GetSession()->SendPacket(&data);
+}
+
+void WorldSession::HandleSetTradeGoldOpcode(WorldPacket& recvPacket)
+{
+ CHECK_PACKET_SIZE(recvPacket,4);
+
+ if(!_player->pTrader)
+ return;
+
+ uint32 gold;
+
+ recvPacket >> gold;
+
+ // gold can be incorrect, but this is checked at trade finished.
+ _player->tradeGold = gold;
+
+ _player->pTrader->GetSession()->SendUpdateTrade();
+}
+
+void WorldSession::HandleSetTradeItemOpcode(WorldPacket& recvPacket)
+{
+ CHECK_PACKET_SIZE(recvPacket,1+1+1);
+
+ if(!_player->pTrader)
+ return;
+
+ // send update
+ uint8 tradeSlot;
+ uint8 bag;
+ uint8 slot;
+
+ recvPacket >> tradeSlot;
+ recvPacket >> bag;
+ recvPacket >> slot;
+
+ // invalid slot number
+ if(tradeSlot >= TRADE_SLOT_COUNT)
+ {
+ SendTradeStatus(TRADE_STATUS_TRADE_CANCELED);
+ return;
+ }
+
+ // check cheating, can't fail with correct client operations
+ Item* item = _player->GetItemByPos(bag,slot);
+ if(!item || tradeSlot!=TRADE_SLOT_NONTRADED && !item->CanBeTraded())
+ {
+ SendTradeStatus(TRADE_STATUS_TRADE_CANCELED);
+ return;
+ }
+
+ uint16 pos = (bag << 8) | slot;
+
+ // prevent place single item into many trade slots using cheating and client bugs
+ for(int i = 0; i < TRADE_SLOT_COUNT; ++i)
+ {
+ if(_player->tradeItems[i]==pos)
+ {
+ // cheating attempt
+ SendTradeStatus(TRADE_STATUS_TRADE_CANCELED);
+ return;
+ }
+ }
+
+ _player->tradeItems[tradeSlot] = pos;
+
+ _player->pTrader->GetSession()->SendUpdateTrade();
+}
+
+void WorldSession::HandleClearTradeItemOpcode(WorldPacket& recvPacket)
+{
+ CHECK_PACKET_SIZE(recvPacket,1);
+
+ if(!_player->pTrader)
+ return;
+
+ uint8 tradeSlot;
+ recvPacket >> tradeSlot;
+
+ // invalid slot number
+ if(tradeSlot >= TRADE_SLOT_COUNT)
+ return;
+
+ _player->tradeItems[tradeSlot] = NULL_SLOT;
+
+ _player->pTrader->GetSession()->SendUpdateTrade();
+}