feat(Core/SendListInventory): Add multivendor function (#3172)

src/server/game/Entities/Player/Player.cpp

@@ -14859,7 +14859,7 @@ 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())
                     {
                         sLog->outErrorDb("Creature %u (Entry: %u) have UNIT_NPC_FLAG_VENDOR but have empty trading item list.", creature->GetGUIDLow(), creature->GetEntry());
@@ -15087,7 +15087,7 @@ 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);
@@ -22089,7 +22089,7 @@ bool Player::BuyItemFromVendorSlot(uint64 vendorguid, uint32 vendorslot, uint32
         return false;
     }
 
-    VendorItemData const* vItems = creature->GetVendorItems();
+    VendorItemData const* vItems = GetSession()->GetCurrentVendor() ? sObjectMgr->GetNpcVendorItemList(GetSession()->GetCurrentVendor()) : creature->GetVendorItems();
     if (!vItems || vItems->Empty())
     {
         SendBuyError(BUY_ERR_CANT_FIND_ITEM, creature, item, 0);

src/server/game/Globals/ObjectMgr.cpp

@@ -8512,8 +8512,9 @@ bool ObjectMgr::RemoveVendorItem(uint32 entry, uint32 item, bool persist /*= tru
     return true;
 }
 
-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
+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)
     {
@@ -8538,6 +8539,7 @@ bool ObjectMgr::IsVendorItemValid(uint32 vendor_entry, uint32 item_id, int32 max
         }
         return false;
     }
+    */
 
     if (!sObjectMgr->GetItemTemplate(item_id))
     {

src/server/game/Handlers/ItemHandler.cpp

@@ -887,7 +887,7 @@ void WorldSession::HandleListInventoryOpcode(WorldPacket & recvData)
     SendListInventory(guid);
 }
 
-void WorldSession::SendListInventory(uint64 vendorGuid)
+void WorldSession::SendListInventory(uint64 vendorGuid, uint32 vendorEntry)
 {
 #if defined(ENABLE_EXTRAS) && defined(ENABLE_EXTRA_LOGS)
     sLog->outDebug(LOG_FILTER_NETWORKIO, "WORLD: Sent SMSG_LIST_INVENTORY");
@@ -911,7 +911,9 @@ void WorldSession::SendListInventory(uint64 vendorGuid)
     if (vendor->HasUnitState(UNIT_STATE_MOVING))
         vendor->StopMoving();
 
-    VendorItemData const* items = vendor->GetVendorItems();
+    SetCurrentVendor(vendorEntry);
+
+    VendorItemData const* items = vendorEntry ? sObjectMgr->GetNpcVendorItemList(vendorEntry) : vendor->GetVendorItems();
     if (!items)
     {
         WorldPacket data(SMSG_LIST_INVENTORY, 8 + 1 + 1);

src/server/game/Server/WorldSession.cpp

@@ -112,6 +112,7 @@ WorldSession::WorldSession(uint32 id, WorldSocket* sock, AccountTypes sec, uint8
     m_TutorialsChanged(false),
     recruiterId(recruiter),
     isRecruiter(isARecruiter),
+    m_currentVendorEntry(0),
     m_currentBankerGUID(0),
     timeWhoCommandAllowed(0),
     _calendarEventCreationCooldown(0)

src/server/game/Server/WorldSession.h

@@ -226,6 +226,9 @@ class WorldSession
         std::string const& GetPlayerName() const;
         std::string GetPlayerInfo() const;
 
+        uint32 GetCurrentVendor() const { return m_currentVendorEntry; }
+        void SetCurrentVendor(uint32 vendorEntry) { m_currentVendorEntry = vendorEntry; }
+
         uint32 GetGuidLow() const;
         void SetSecurity(AccountTypes security) { _security = security; }
         std::string const& GetRemoteAddress() { return m_Address; }
@@ -270,7 +273,7 @@ class WorldSession
 
         void SendTrainerList(uint64 guid);
         void SendTrainerList(uint64 guid, std::string const& strTitle);
-        void SendListInventory(uint64 guid);
+        void SendListInventory(uint64 guid, uint32 vendorEntry = 0);
         void SendShowBank(uint64 guid);
         bool CanOpenMailBox(uint64 guid);
         void SendShowMailBox(uint64 guid);
@@ -1031,6 +1034,7 @@ class WorldSession
         uint32 recruiterId;
         bool isRecruiter;
         ACE_Based::LockedQueue<WorldPacket*, ACE_Thread_Mutex> _recvQueue;
+        uint32 m_currentVendorEntry;
         uint64 m_currentBankerGUID;
         time_t timeWhoCommandAllowed;
         uint32 _offlineTime;

src/server/scripts/Commands/cs_npc.cpp

@@ -295,7 +295,8 @@ public:
             return false;
         }
 
-        uint32 vendor_entry = vendor->GetEntry();
+        char* addMulti = strtok(nullptr, " ");
+        uint32 vendor_entry = addMulti ? handler->GetSession()->GetCurrentVendor() : vendor->GetEntry();
 
         if (!sObjectMgr->IsVendorItemValid(vendor_entry, itemId, maxcount, incrtime, extendedcost, handler->GetSession()->GetPlayer()))
         {
@@ -518,7 +519,8 @@ public:
         }
         uint32 itemId = atol(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);