eluna-scripts-ornfelt/lua/WowEmulationScriptPack/C++/MultiVendor/patch.patch

diff --git a/src/server/game/Entities/Player/Player.cpp b/src/server/game/Entities/Player/Player.cpp
index 26f47b5434..a704689a91 100644
--- a/src/server/game/Entities/Player/Player.cpp
+++ b/src/server/game/Entities/Player/Player.cpp
@@ -14222,7 +14222,7 @@ void Player::PrepareGossipMenu(WorldObject* source, uint32 menuId /*= 0*/, bool
                     break;
                 case GOSSIP_OPTION_VENDOR:
                 {
-                    VendorItemData const* vendorItems = creature->GetVendorItems();
+                    VendorItemData const* vendorItems = itr->second.ActionMenuId ? sObjectMgr->GetNpcVendorItemList(itr->second.ActionMenuId) : creature->GetVendorItems();
                     if (!vendorItems || vendorItems->Empty())
                     {
                         TC_LOG_ERROR("sql.sql", "Creature %s (Entry: %u GUID: %u DB GUID: %u) has UNIT_NPC_FLAG_VENDOR set, but has an empty trading item list.", creature->GetName().c_str(), creature->GetEntry(), creature->GetGUID().GetCounter(), creature->GetSpawnId());
@@ -14439,7 +14439,7 @@ void Player::OnGossipSelect(WorldObject* source, uint32 gossipListId, uint32 men
             break;
         case GOSSIP_OPTION_VENDOR:
         case GOSSIP_OPTION_ARMORER:
-            GetSession()->SendListInventory(guid);
+            GetSession()->SendListInventory(guid, menuItemData->GossipActionMenuId);
             break;
         case GOSSIP_OPTION_STABLEPET:
             GetSession()->SendStablePet(guid);
@@ -21602,7 +21602,11 @@ bool Player::BuyItemFromVendorSlot(ObjectGuid vendorguid, uint32 vendorslot, uin
         return false;
     }
 
-    VendorItemData const* vItems = creature->GetVendorItems();
+    uint32 currentVendor = GetSession()->GetCurrentVendor();
+    if (currentVendor && vendorguid != PlayerTalkClass->GetGossipMenu().GetSenderGUID())
+        return false; // Cheating
+
+    VendorItemData const* vItems = currentVendor ? sObjectMgr->GetNpcVendorItemList(currentVendor) : creature->GetVendorItems();
     if (!vItems || vItems->Empty())
     {
         SendBuyError(BUY_ERR_CANT_FIND_ITEM, creature, item, 0);
diff --git a/src/server/game/Globals/ObjectMgr.cpp b/src/server/game/Globals/ObjectMgr.cpp
index 43681910ac..f5e65505d6 100644
--- a/src/server/game/Globals/ObjectMgr.cpp
+++ b/src/server/game/Globals/ObjectMgr.cpp
@@ -8565,6 +8565,7 @@ bool ObjectMgr::RemoveVendorItem(uint32 entry, uint32 item, bool persist /*= tru
 
 bool ObjectMgr::IsVendorItemValid(uint32 vendor_entry, uint32 item_id, int32 maxcount, uint32 incrtime, uint32 ExtendedCost, Player* player, std::set<uint32>* skip_vendors, uint32 ORnpcflag) const
 {
+    /*
     CreatureTemplate const* cInfo = sObjectMgr->GetCreatureTemplate(vendor_entry);
     if (!cInfo)
     {
@@ -8589,6 +8590,7 @@ bool ObjectMgr::IsVendorItemValid(uint32 vendor_entry, uint32 item_id, int32 max
         }
         return false;
     }
+    */
 
     if (!sObjectMgr->GetItemTemplate(item_id))
     {
diff --git a/src/server/game/Handlers/ItemHandler.cpp b/src/server/game/Handlers/ItemHandler.cpp
index 721e0a9b54..b19e8c2f91 100644
--- a/src/server/game/Handlers/ItemHandler.cpp
+++ b/src/server/game/Handlers/ItemHandler.cpp
@@ -597,7 +597,7 @@ void WorldSession::HandleListInventoryOpcode(WorldPacket& recvData)
     SendListInventory(guid);
 }
 
-void WorldSession::SendListInventory(ObjectGuid vendorGuid)
+void WorldSession::SendListInventory(ObjectGuid vendorGuid, uint32 vendorEntry)
 {
     Creature* vendor = GetPlayer()->GetNPCIfCanInteractWith(vendorGuid, UNIT_NPC_FLAG_VENDOR);
     if (!vendor)
@@ -615,7 +615,7 @@ void WorldSession::SendListInventory(ObjectGuid vendorGuid)
     if (vendor->HasUnitState(UNIT_STATE_MOVING))
         vendor->StopMoving();
 
-    VendorItemData const* items = vendor->GetVendorItems();
+    VendorItemData const* items = vendorEntry ? sObjectMgr->GetNpcVendorItemList(vendorEntry) : vendor->GetVendorItems();
     if (!items)
     {
         WorldPacket data(SMSG_LIST_INVENTORY, 8 + 1 + 1);
@@ -626,6 +626,8 @@ void WorldSession::SendListInventory(ObjectGuid vendorGuid)
         return;
     }
 
+    SetCurrentVendor(vendorEntry);
+
     uint8 itemCount = items->GetItemCount();
     uint8 count = 0;
 
diff --git a/src/server/game/Server/WorldSession.cpp b/src/server/game/Server/WorldSession.cpp
index 7eda06aefe..766e892a16 100644
--- a/src/server/game/Server/WorldSession.cpp
+++ b/src/server/game/Server/WorldSession.cpp
@@ -127,7 +127,8 @@ WorldSession::WorldSession(uint32 id, std::string&& name, std::shared_ptr<WorldS
     _RBACData(NULL),
     expireTime(60000), // 1 min after socket loss, session is deleted
     forceExit(false),
-    m_currentBankerGUID()
+    m_currentBankerGUID(),
+    m_currentVendorEntry(0)
 {
     memset(m_Tutorials, 0, sizeof(m_Tutorials));
 
diff --git a/src/server/game/Server/WorldSession.h b/src/server/game/Server/WorldSession.h
index e5ae690246..8febdbe3e4 100644
--- a/src/server/game/Server/WorldSession.h
+++ b/src/server/game/Server/WorldSession.h
@@ -313,6 +313,9 @@ class TC_GAME_API WorldSession
         std::string const& GetPlayerName() const;
         std::string GetPlayerInfo() const;
 
+        uint32 GetCurrentVendor() const { return m_currentVendorEntry; }
+        void SetCurrentVendor(uint32 vendorEntry) { m_currentVendorEntry = vendorEntry; }
+
         ObjectGuid::LowType GetGUIDLow() const;
         void SetSecurity(AccountTypes security) { _security = security; }
         std::string const& GetRemoteAddress() const { return m_Address; }
@@ -352,7 +355,7 @@ class TC_GAME_API WorldSession
 
         void SendTrainerList(ObjectGuid guid);
         void SendTrainerList(ObjectGuid guid, std::string const& strTitle);
-        void SendListInventory(ObjectGuid guid);
+        void SendListInventory(ObjectGuid guid, uint32 vendorEntry = 0);
         void SendShowBank(ObjectGuid guid);
         bool CanOpenMailBox(ObjectGuid guid);
         void SendShowMailBox(ObjectGuid guid);
@@ -1086,6 +1089,7 @@ class TC_GAME_API WorldSession
         uint32 expireTime;
         bool forceExit;
         ObjectGuid m_currentBankerGUID;
+        uint32 m_currentVendorEntry;
 
         WorldSession(WorldSession const& right) = delete;
         WorldSession& operator=(WorldSession const& right) = delete;
diff --git a/src/server/scripts/Commands/cs_npc.cpp b/src/server/scripts/Commands/cs_npc.cpp
index 22bb02ae54..cf232a439e 100644
--- a/src/server/scripts/Commands/cs_npc.cpp
+++ b/src/server/scripts/Commands/cs_npc.cpp
@@ -340,7 +340,8 @@ public:
             return false;
         }
 
-        uint32 vendor_entry = vendor->GetEntry();
+        char* addMulti = strtok(NULL, " ");
+        uint32 vendor_entry = addMulti ? handler->GetSession()->GetCurrentVendor() : vendor ? vendor->GetEntry() : 0;
 
         if (!sObjectMgr->IsVendorItemValid(vendor_entry, itemId, maxcount, incrtime, extendedcost, handler->GetSession()->GetPlayer()))
         {
@@ -522,7 +523,8 @@ public:
         }
         uint32 itemId = atoul(pitem);
 
-        if (!sObjectMgr->RemoveVendorItem(vendor->GetEntry(), itemId))
+        char* addMulti = strtok(NULL, " ");
+        if (!sObjectMgr->RemoveVendorItem(addMulti ? handler->GetSession()->GetCurrentVendor() : vendor->GetEntry(), itemId))
         {
             handler->PSendSysMessage(LANG_ITEM_NOT_IN_LIST, itemId);
             handler->SetSentErrorMessage(true);