call OnObjectDBLoad(Creature/GameObject) for battleground at object-loading

this is a virtual function and can be used to move gameobjects
and creatures from battlegroundcode to database

for this i also had to add a BattleGround-pointer to the map
so i renamed CreateBattleGround(instanceid) to CreateBattleGroundMap(instanceid, Battleground*)

src/game/BattleGround.h

@@ -477,6 +477,9 @@ class BattleGround
         virtual void RemovePlayerAtLeave(uint64 guid, bool Transport, bool SendPacket);
                                                             // can be extended in in BG subclass
 
+        virtual void OnObjectDBLoad(Creature* /*creature*/);
+        virtual void OnObjectDBLoad(GameObject* /*obj*/);
+
         void HandleTriggerBuff(uint64 const& go_guid);
 
         // TODO: make this protected:

src/game/Map.h

@@ -43,6 +43,7 @@ class Group;
 class InstanceSave;
 struct ScriptInfo;
 struct ScriptAction;
+class BattleGround;
 
 
 typedef ACE_RW_Thread_Mutex GridRWLock;
@@ -585,6 +586,10 @@ class MANGOS_DLL_SPEC BattleGroundMap : public Map
         void UnloadAll(bool pForce);
 
         virtual void InitVisibilityDistance();
+        BattleGround* GetBG() { return m_bg; }
+        void SetBG(BattleGround* bg) { m_bg = bg; }
+    private:
+        BattleGround* m_bg;
 };
 
 /*inline

src/game/MapInstanced.cpp

@@ -135,7 +135,7 @@ Map* MapInstanced::CreateInstance(const uint32 mapId, Player * player)
         ASSERT(NewInstanceId);
         map = _FindMap(NewInstanceId);
         if(!map)
-            map = CreateBattleGround(NewInstanceId);
+            map = CreateBattleGroundMap(NewInstanceId, player->GetBattleGround());
     }
     else
     {
@@ -208,15 +208,16 @@ InstanceMap* MapInstanced::CreateInstance(uint32 InstanceId, InstanceSave *save,
     return map;
 }
 
-BattleGroundMap* MapInstanced::CreateBattleGround(uint32 InstanceId)
+BattleGroundMap* MapInstanced::CreateBattleGroundMap(uint32 InstanceId, BattleGround* bg)
 {
     // load/create a map
     Guard guard(*this);
 
-    sLog.outDebug("MapInstanced::CreateBattleGround: map bg %d for %d created.", InstanceId, GetId());
+    sLog.outDebug("MapInstanced::CreateBattleGroundMap: instance:%d for map:%d and bgType:%d created.", InstanceId, GetId(), bg->GetTypeID());
 
     BattleGroundMap *map = new BattleGroundMap(GetId(), GetGridExpiry(), InstanceId, this);
     ASSERT(map->IsBattleGroundOrArena());
+    map->SetBG(bg);
 
     m_InstancedMaps[InstanceId] = map;
     return map;

src/game/MapInstanced.h

@@ -62,7 +62,7 @@ class MANGOS_DLL_DECL MapInstanced : public Map
     private:
 
         InstanceMap* CreateInstance(uint32 InstanceId, InstanceSave *save, uint8 difficulty);
-        BattleGroundMap* CreateBattleGround(uint32 InstanceId);
+        BattleGroundMap* CreateBattleGroundMap(uint32 InstanceId, BattleGround* bg);
 
         InstancedMaps m_InstancedMaps;
 

src/game/ObjectGridLoader.cpp

@@ -109,6 +109,8 @@ template<> void addUnitState(Creature *obj, CellPair const& cell_pair)
 template <class T>
 void LoadHelper(CellGuidSet const& guid_set, CellPair &cell, GridRefManager<T> &m, uint32 &count, Map* map)
 {
+    BattleGround* bg = map->IsBattleGroundOrArena() ? ((BattleGroundMap*)map)->GetBG() : NULL;
+
     for(CellGuidSet::const_iterator i_guid = guid_set.begin(); i_guid != guid_set.end(); ++i_guid)
     {
         T* obj = new T;
@@ -127,9 +129,10 @@ void LoadHelper(CellGuidSet const& guid_set, CellPair &cell, GridRefManager<T> &
         obj->AddToWorld();
         if(obj->isActiveObject())
             map->AddToActive(obj);
+        if (bg)
+            bg->OnObjectDBLoad(obj);
 
         ++count;
-
     }
 }