From a8b8199acb7f3222ab48c78c5b2e69c5bb777330 Mon Sep 17 00:00:00 2001
From: UltraNix <80540499+UltraNix@users.noreply.github.com>
Date: Mon, 20 Mar 2023 14:45:41 +0100
Subject: [PATCH] fix(Core/Grids): Creatures should attack when loaded into
 grid. (#15453)

* fix(Core/Grids): Creatures should attack when loaded into grid.

Fixes #14645

* Update.
---
 src/server/game/Grids/ObjectGridLoader.cpp | 21 ++++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/src/server/game/Grids/ObjectGridLoader.cpp b/src/server/game/Grids/ObjectGridLoader.cpp
index 25ff2343b..ac1631caf 100644
--- a/src/server/game/Grids/ObjectGridLoader.cpp
+++ b/src/server/game/Grids/ObjectGridLoader.cpp
@@ -18,6 +18,7 @@
 #include "ObjectGridLoader.h"
 #include "CellImpl.h"
 #include "Corpse.h"
+#include "GridNotifiers.h"
 #include "Creature.h"
 #include "CreatureAI.h"
 #include "DynamicObject.h"
@@ -97,13 +98,17 @@ void AddObjectHelper(CellCoord& cell, GameObjectMapType& m, uint32& count, Map*
 }
 
 template <class T>
-void LoadHelper(CellGuidSet const& guid_set, CellCoord& cell, GridRefMgr<T>& m, uint32& count, Map* map)
+void LoadHelper(CellGuidSet const& /*guid_set*/, CellCoord& /*cell*/, GridRefMgr<T>& /*m*/, uint32& /*count*/, Map* /*map*/)
+{
+}
+
+template <>
+void LoadHelper(CellGuidSet const& guid_set, CellCoord& cell, GridRefMgr<Creature>& m, uint32& count, Map* map)
 {
     for (CellGuidSet::const_iterator i_guid = guid_set.begin(); i_guid != guid_set.end(); ++i_guid)
     {
-        T* obj = new T;
+        Creature* obj = new Creature();
         ObjectGuid::LowType guid = *i_guid;
-
         if (!obj->LoadFromDB(guid, map))
         {
             delete obj;
@@ -111,6 +116,16 @@ void LoadHelper(CellGuidSet const& guid_set, CellCoord& cell, GridRefMgr<T>& m,
         }
 
         AddObjectHelper(cell, m, count, map, obj);
+
+        if (!obj->IsMoveInLineOfSightDisabled() && obj->GetDefaultMovementType() == IDLE_MOTION_TYPE && !obj->isNeedNotify(NOTIFY_VISIBILITY_CHANGED | NOTIFY_AI_RELOCATION))
+        {
+            if (obj->IsAlive() && !obj->HasUnitState(UNIT_STATE_SIGHTLESS) && obj->HasReactState(REACT_AGGRESSIVE) && !obj->IsImmuneToNPC())
+            {
+                // call MoveInLineOfSight for nearby grid creatures
+                Acore::AIRelocationNotifier notifier(*obj);
+                Cell::VisitGridObjects(obj, notifier, 60.f);
+            }
+        }
     }
 }