Core/Units: Added helper functions to modify UNIT_FLAG_UNINTERACTIBLE

Port From (https://github.com/TrinityCore/TrinityCore/commit/88ff97c1f96381565c47f8ca1993bdc7fce19fd6)

Source/Game/Entities/Creature/Creature.cs

@@ -373,7 +373,7 @@ namespace Game.Entities
 
             // trigger creature is always not selectable and can not be attacked
             if (IsTrigger())
-                SetUnitFlag(UnitFlags.Uninteractible);
+                SetUninteractible(true);
 
             InitializeReactState();
 
@@ -2305,7 +2305,7 @@ namespace Game.Entities
             if (IsCivilian())
                 return false;
 
-            if (HasUnitFlag(UnitFlags.NonAttackable | UnitFlags.Uninteractible) || IsImmuneToNPC())
+            if (HasUnitFlag(UnitFlags.NonAttackable) || IsImmuneToNPC() || IsUninteractible())
                 return false;
 
             // skip fighting creature

Source/Game/Entities/Object/WorldObject.cs

@@ -2557,7 +2557,7 @@ namespace Game.Entities
             if ((bySpell == null || !bySpell.HasAttribute(SpellAttr6.CanTargetUntargetable)) && unitTarget != null && unitTarget.HasUnitFlag(UnitFlags.NonAttackable2))
                 return false;
 
-            if (unitTarget != null && unitTarget.HasUnitFlag(UnitFlags.Uninteractible))
+            if (unitTarget != null && unitTarget.IsUninteractible())
                 return false;
 
             Player playerAttacker = ToPlayer();
@@ -2714,7 +2714,7 @@ namespace Game.Entities
             if ((bySpell == null || !bySpell.HasAttribute(SpellAttr6.CanTargetUntargetable)) && unitTarget != null && unitTarget.HasUnitFlag(UnitFlags.NonAttackable2))
                 return false;
 
-            if (unitTarget != null && unitTarget.HasUnitFlag(UnitFlags.Uninteractible))
+            if (unitTarget != null && unitTarget.IsUninteractible())
                 return false;
 
             // check flags for negative spells

Source/Game/Entities/Player/Player.cs

@@ -3371,7 +3371,7 @@ namespace Game.Entities
                 {
                     Creature creature = GetMap().GetCreature(guid);
                     // Update fields of triggers, transformed units or unselectable units (values dependent on GM state)
-                    if (creature == null || (!creature.IsTrigger() && !creature.HasAuraType(AuraType.Transform) && !creature.HasUnitFlag(UnitFlags.Uninteractible)))
+                    if (creature == null || (!creature.IsTrigger() && !creature.HasAuraType(AuraType.Transform) && !creature.IsUninteractible()))
                         continue;
 
                     creature.m_values.ModifyValue(m_unitData).ModifyValue(m_unitData.DisplayID);

Source/Game/Entities/Unit/Unit.Combat.cs

@@ -147,7 +147,7 @@ namespace Game.Entities
             if (!IsAlive())
                 return false;
 
-            if (HasUnitFlag(UnitFlags.NonAttackable | UnitFlags.Uninteractible))
+            if (HasUnitFlag(UnitFlags.NonAttackable) || IsUninteractible())
                 return false;
 
             if (IsTypeId(TypeId.Player) && ToPlayer().IsGameMaster())

Source/Game/Entities/Unit/Unit.cs

@@ -3209,6 +3209,16 @@ namespace Game.Entities
 
         public virtual void SetImmuneToNPC(bool apply) { SetImmuneToNPC(apply, false); }
 
+        public bool IsUninteractible() { return HasUnitFlag(UnitFlags.Uninteractible); }
+
+        public void SetUninteractible(bool apply)
+        {
+            if (apply)
+                SetUnitFlag(UnitFlags.Uninteractible);
+            else
+                RemoveUnitFlag(UnitFlags.Uninteractible);
+        }
+
         public virtual float GetBlockPercent(uint attackerLevel) { return 30.0f; }
 
         void UpdateReactives(uint p_time)

Source/Game/Entities/Vehicle.cs

@@ -365,7 +365,7 @@ namespace Game.Entities
 
             // Remove UNIT_FLAG_NOT_SELECTABLE if passenger did not have it before entering vehicle
             if (seat.Value.SeatInfo.HasFlag(VehicleSeatFlags.PassengerNotSelectable) && !seat.Value.Passenger.IsUninteractible)
-                unit.RemoveUnitFlag(UnitFlags.Uninteractible);
+                unit.SetUninteractible(false);
 
             seat.Value.Passenger.Reset();
 
@@ -642,7 +642,7 @@ namespace Game.Entities
 
             Passenger.SetVehicle(Target);
             Seat.Value.Passenger.Guid = Passenger.GetGUID();
-            Seat.Value.Passenger.IsUninteractible = Passenger.HasUnitFlag(UnitFlags.Uninteractible);
+            Seat.Value.Passenger.IsUninteractible = Passenger.IsUninteractible();
             Seat.Value.Passenger.IsGravityDisabled = Passenger.HasUnitMovementFlag(MovementFlag.DisableGravity);
             if (Seat.Value.SeatInfo.CanEnterOrExit())
             {