From 1f21e6893f81719c41f141453ca29613aecfa97a Mon Sep 17 00:00:00 2001
From: hondacrx <prelude_20032002@yahoo.com>
Date: Tue, 10 May 2022 09:38:14 -0400
Subject: [PATCH] Core/Auras: Implemented SPELL_AURA_DISABLE_INERTIA (506)

Port From (https://github.com/TrinityCore/TrinityCore/commit/d945a118db6d2b423a77c419eb8dd7f4732802a2)
---
 Source/Game/Entities/Player/Player.cs      |  6 +++++
 Source/Game/Entities/Unit/Unit.Movement.cs | 26 ++++++++++++++++++++++
 Source/Game/Spells/Auras/AuraEffect.cs     | 18 +++++++++++++++
 3 files changed, 50 insertions(+)

diff --git a/Source/Game/Entities/Player/Player.cs b/Source/Game/Entities/Player/Player.cs
index 458c5ed17..660fbfadf 100644
--- a/Source/Game/Entities/Player/Player.cs
+++ b/Source/Game/Entities/Player/Player.cs
@@ -5749,6 +5749,12 @@ namespace Game.Entities
             if (HasAura(196055)) //DH DoubleJump
                 setCompoundState.StateChanges.Add(new MoveSetCompoundState.MoveStateChange(ServerOpcodes.MoveEnableDoubleJump, m_movementCounter++));
 
+            if (HasAuraType(AuraType.IgnoreMovementForces))
+                setCompoundState.StateChanges.Add(new MoveSetCompoundState.MoveStateChange(ServerOpcodes.MoveSetIgnoreMovementForces, m_movementCounter++));
+
+            if (HasAuraType(AuraType.DisableInertia))
+                setCompoundState.StateChanges.Add(new MoveSetCompoundState.MoveStateChange(ServerOpcodes.MoveDisableInertia, m_movementCounter++));
+
             if (!setCompoundState.StateChanges.Empty())
             {
                 setCompoundState.MoverGUID = GetGUID();
diff --git a/Source/Game/Entities/Unit/Unit.Movement.cs b/Source/Game/Entities/Unit/Unit.Movement.cs
index 2bbb3698a..c2af784ad 100644
--- a/Source/Game/Entities/Unit/Unit.Movement.cs
+++ b/Source/Game/Entities/Unit/Unit.Movement.cs
@@ -395,6 +395,32 @@ namespace Game.Entities
             return true;
         }
 
+        public bool SetDisableInertia(bool disable)
+        {
+            if (disable == HasExtraUnitMovementFlag2(MovementFlags3.DisableInertia))
+                return false;
+
+            if (disable)
+                AddExtraUnitMovementFlag2(MovementFlags3.DisableInertia);
+            else
+                RemoveExtraUnitMovementFlag2(MovementFlags3.DisableInertia);
+
+            Player playerMover = GetUnitBeingMoved()?.ToPlayer();
+            if (playerMover != null)
+            {
+                MoveSetFlag packet = new(disable ? ServerOpcodes.MoveDisableInertia : ServerOpcodes.MoveEnableInertia);
+                packet.MoverGUID = GetGUID();
+                packet.SequenceIndex = m_movementCounter++;
+                playerMover.SendPacket(packet);
+
+                MoveUpdate moveUpdate = new();
+                moveUpdate.Status = m_movementInfo;
+                SendMessageToSet(moveUpdate, playerMover);
+            }
+
+            return true;
+        }
+
         public void JumpTo(float speedXY, float speedZ, float angle, Position dest = null)
         {
             if (dest != null)
diff --git a/Source/Game/Spells/Auras/AuraEffect.cs b/Source/Game/Spells/Auras/AuraEffect.cs
index d1c252887..d23b2abae 100644
--- a/Source/Game/Spells/Auras/AuraEffect.cs
+++ b/Source/Game/Spells/Auras/AuraEffect.cs
@@ -2303,6 +2303,24 @@ namespace Game.Spells
             target.SetIgnoreMovementForces(apply);
         }
 
+        [AuraEffectHandler(AuraType.IgnoreMovementForces)]
+        void HandleDisableInertia(AuraApplication aurApp, AuraEffectHandleModes mode, bool apply)
+        {
+            if (!mode.HasFlag(AuraEffectHandleModes.SendForClientMask))
+                return;
+
+            Unit target = aurApp.GetTarget();
+
+            if (!apply)
+            {
+                // do not remove unit flag if there are more than this auraEffect of that kind on unit on unit
+                if (target.HasAuraType(GetAuraType()))
+                    return;
+            }
+
+            target.SetDisableInertia(apply);
+        }
+
         /****************************/
         /***        THREAT        ***/
         /****************************/