Core/PacketIO: Implemented CMSG_UPDATE_SPELL_VISUAL

Port From (https://github.com/TrinityCore/TrinityCore/commit/0d475eac5f2fdee58d79b1f3361da6d3f22b0232)

Source/Game/Handlers/SpellHandler.cs

@@ -603,6 +603,26 @@ namespace Game
             }
         }
 
+        [WorldPacketHandler(ClientOpcodes.UpdateSpellVisual, Processing = PacketProcessing.Inplace)]
+        void HandleUpdateAuraVisual(UpdateAuraVisual updateAuraVisual)
+        {
+            Unit target = Global.ObjAccessor.GetUnit(_player, updateAuraVisual.TargetGUID);
+            if (target == null)
+                return;
+
+            SpellInfo spellInfo = Global.SpellMgr.GetSpellInfo(updateAuraVisual.SpellID, _player.GetMap().GetDifficultyID());
+            if (spellInfo == null)
+                return;
+
+            uint spellXspellVisualId = _player.GetCastSpellXSpellVisualId(spellInfo);
+            foreach (var (_, auraApp) in target.GetAppliedAuras().Where(p => p.Key == spellInfo.Id))
+                if (auraApp.GetBase().GetCasterGUID() == _player.GetGUID())
+                    auraApp.GetBase().SetSpellVisual(new SpellCastVisual() { SpellXSpellVisualID = spellXspellVisualId });
+
+            if (_player.GetChannelSpellId() == spellInfo.Id)
+                _player.SetChannelVisual(new SpellCastVisualField() { SpellXSpellVisualID = spellXspellVisualId });
+        }
+
         [WorldPacketHandler(ClientOpcodes.KeyboundOverride, Processing = PacketProcessing.ThreadSafe)]
         void HandleKeyboundOverride(KeyboundOverride keyboundOverride)
         {

Source/Game/Networking/Packets/SpellPackets.cs

@@ -1216,6 +1216,22 @@ namespace Game.Networking.Packets
         public MovementInfo Status;
     }
 
+    class UpdateAuraVisual : ClientPacket
+    {
+        public uint SpellID;
+        public SpellCastVisual Visual;
+        public ObjectGuid TargetGUID;
+
+        public UpdateAuraVisual(WorldPacket packet) : base(packet) { }
+
+        public override void Read()
+        {
+            SpellID = _worldPacket.ReadUInt32();
+            Visual.Read(_worldPacket);
+            TargetGUID = _worldPacket.ReadPackedGuid();
+        }
+    }
+
     public class SpellDelayed : ServerPacket
     {
         public SpellDelayed() : base(ServerOpcodes.SpellDelayed, ConnectionType.Instance) { }

Source/Game/Spells/Auras/Aura.cs

@@ -426,6 +426,12 @@ namespace Game.Spells
             _DeleteRemovedApplications();
         }
 
+        public void SetSpellVisual(SpellCastVisual spellVisual)
+        {
+            m_spellVisual = spellVisual;
+            SetNeedClientUpdateForTargets();
+        }
+
         public Unit GetCaster()
         {
             if (m_owner.GetGUID() == m_casterGuid)