Spells: Allow secondary target checking for area auras

src/game/Entities/DynamicObject.cpp

@@ -216,3 +216,9 @@ void DynamicObject::OnPersistentAreaAuraEnd()
         m_auraScript->OnPersistentAreaAuraEnd(this);
 }
 
+bool DynamicObject::OnPersistentAreaAuraCheckTarget(Unit* target)
+{
+    if (m_auraScript)
+        return m_auraScript->OnPersistentAreaAuraCheckTarget(this, target);
+    return true;
+}

src/game/Entities/DynamicObject.h

@@ -71,6 +71,7 @@ class DynamicObject : public WorldObject
         bool CanAssistSpell(Unit const* target, SpellEntry const* spellInfo = nullptr) const override;
 
         void OnPersistentAreaAuraEnd();
+        bool OnPersistentAreaAuraCheckTarget(Unit* target);
 
         float GetObjectBoundingRadius() const override { return 0.f; } // dynamic object not have real interact size
         float GetCollisionHeight() const override { return 1.f; } // to get away with ground collision

src/game/Grids/GridNotifiersImpl.h

@@ -258,6 +258,9 @@ inline void MaNGOS::DynamicObjectUpdater::VisitHelper(Unit* target)
         }
     }
 
+    if (!i_dynobject.OnPersistentAreaAuraCheckTarget(target))
+        return;
+
     if (spellInfo->HasAttribute(SPELL_ATTR_EX3_ONLY_ON_PLAYER) && target->GetTypeId() != TYPEID_PLAYER)
         return;
 

src/game/Spells/Scripts/SpellScript.h

@@ -127,6 +127,8 @@ struct AuraScript
     virtual void OnPeriodicTickEnd(Aura* /*aura*/) const {}
     // called on persistent area aura dyngo lifetime end
     virtual void OnPersistentAreaAuraEnd(DynamicObject* /*dynGo*/) const {}
+    // called on AreaAura target selection
+    virtual bool OnPersistentAreaAuraCheckTarget(DynamicObject* /*dynGo*/, Unit* /*target*/) const { return true; }
     // called on unit heartbeat
     virtual void OnHeartbeat(Aura* /*aura*/) const {}
     // called on affect check of aura - spellInfo can be nullptr in case of melee