Core/Spell: SpellAura Redux

Port From (https://github.com/TrinityCore/TrinityCore/commit/f7299dce9770a5b4a3a5ab289e930a390aa0407a)

Source/Game/Entities/Unit/Unit.Spells.cs

@@ -3822,14 +3822,14 @@ namespace Game.Entities
             if (aura.IsRemoved())
                 return;
 
-            aura.SetIsSingleTarget(caster != null && aura.GetSpellInfo().IsSingleTarget() || aura.HasEffectType(AuraType.ControlVehicle));
+            aura.SetIsSingleTarget(caster != null && aura.GetSpellInfo().IsSingleTarget());
             if (aura.IsSingleTarget())
             {
 
                 // @HACK: Player is not in world during loading auras.
                 //Single target auras are not saved or loaded from database
                 //but may be created as a result of aura links (player mounts with passengers)
-                Cypher.Assert((IsInWorld && !IsDuringRemoveFromWorld()) || (aura.GetCasterGUID() == GetGUID()) || (IsLoading() && aura.HasEffectType(AuraType.ControlVehicle)));
+                Cypher.Assert((IsInWorld && !IsDuringRemoveFromWorld()) || aura.GetCasterGUID() == GetGUID());
 
                 // register single target aura
                 caster.m_scAuras.Add(aura);

Source/Game/Entities/Unit/Unit.cs

@@ -900,6 +900,11 @@ namespace Game.Entities
                 }
                 else if (seatId >= 0 && seatId == GetTransSeat())
                     return;
+                else
+                {
+                    //Exit the current vehicle because unit will reenter in a new seat.
+                    m_vehicle.GetBase().RemoveAurasByType(AuraType.ControlVehicle, GetGUID(), aurApp.GetBase());
+                }
             }
 
             if (aurApp.HasRemoveMode())

Source/Game/Spells/Auras/Aura.cs

@@ -1056,9 +1056,6 @@ namespace Game.Spells
                     break;
             }
 
-            if (HasEffectType(AuraType.ControlVehicle) && aura.HasEffectType(AuraType.ControlVehicle))
-                return true;
-
             return false;
         }
 

Source/Game/Spells/Spell.cs

@@ -2012,7 +2012,7 @@ namespace Game.Spells
                 if (caster != null)
                 {
                     // delayed spells with multiple targets need to create a new aura object, otherwise we'll access a deleted aura
-                    if (spellAura == null || (m_spellInfo.HasHitDelay() && !m_spellInfo.IsChanneled()))
+                    if (hitInfo.HitAura == null)
                     {
                         bool resetPeriodicTimer = !_triggeredCastFlags.HasFlag(TriggerCastFlags.DontResetPeriodicTimer);
                         uint allAuraEffectMask = Aura.BuildEffectMaskForOwner(m_spellInfo, SpellConst.MaxEffectMask, unit);
@@ -2027,23 +2027,23 @@ namespace Game.Spells
                         Aura aura = Aura.TryRefreshStackOrCreate(createInfo);
                         if (aura != null)
                         {
-                            spellAura = aura.ToUnitAura();
+                            hitInfo.HitAura = aura.ToUnitAura();
 
                             // Set aura stack amount to desired value
                             if (m_spellValue.AuraStackAmount > 1)
                             {
                                 if (!createInfo.IsRefresh)
-                                    spellAura.SetStackAmount((byte)m_spellValue.AuraStackAmount);
+                                    hitInfo.HitAura.SetStackAmount((byte)m_spellValue.AuraStackAmount);
                                 else
-                                    spellAura.ModStackAmount(m_spellValue.AuraStackAmount);
+                                    hitInfo.HitAura.ModStackAmount(m_spellValue.AuraStackAmount);
                             }
 
 
-                            spellAura.SetDiminishGroup(hitInfo.DRGroup);
+                            hitInfo.HitAura.SetDiminishGroup(hitInfo.DRGroup);
 
                             if (!m_spellValue.Duration.HasValue)
                             {
-                                hitInfo.AuraDuration = caster.ModSpellDuration(m_spellInfo, unit, hitInfo.AuraDuration, hitInfo.Positive, spellAura.GetEffectMask());
+                                hitInfo.AuraDuration = caster.ModSpellDuration(m_spellInfo, unit, hitInfo.AuraDuration, hitInfo.Positive, hitInfo.HitAura.GetEffectMask());
 
                                 if (hitInfo.AuraDuration > 0)
                                 {
@@ -2056,7 +2056,7 @@ namespace Game.Spells
                                     {
                                         int origDuration = hitInfo.AuraDuration;
                                         hitInfo.AuraDuration = 0;
-                                        foreach (AuraEffect auraEff in spellAura.GetAuraEffects())
+                                        foreach (AuraEffect auraEff in hitInfo.HitAura.GetAuraEffects())
                                         {
                                             if (auraEff != null)
                                             {
@@ -2075,21 +2075,21 @@ namespace Game.Spells
                             else
                                 hitInfo.AuraDuration = m_spellValue.Duration.Value;
 
-                            if (hitInfo.AuraDuration != spellAura.GetMaxDuration())
+                            if (hitInfo.AuraDuration != hitInfo.HitAura.GetMaxDuration())
                             {
-                                spellAura.SetMaxDuration(hitInfo.AuraDuration);
+                                hitInfo.HitAura.SetMaxDuration(hitInfo.AuraDuration);
-                                spellAura.SetDuration(hitInfo.AuraDuration);
+                                hitInfo.HitAura.SetDuration(hitInfo.AuraDuration);
                             }
                         }
                     }
                     else
-                        spellAura.AddStaticApplication(unit, aura_effmask);
+                        hitInfo.HitAura.AddStaticApplication(unit, aura_effmask);
-
-                    hitInfo.HitAura = spellAura;
                 }
             }
 
+            spellAura = hitInfo.HitAura;
             HandleEffects(unit, null, null, spellEffectInfo, SpellEffectHandleMode.HitTarget);
+            spellAura = null;
         }
 
         public void DoTriggersOnSpellHit(Unit unit, uint effMask)
@@ -8070,7 +8070,9 @@ namespace Game.Spells
                     spell.GetCaster().ToPlayer().UpdatePvP(true);
             }
 
+            spell.spellAura = HitAura;
             spell.CallScriptAfterHitHandlers();
+            spell.spellAura = null;
         }
     }
 

Source/Scripts/Spells/Generic.cs

@@ -277,6 +277,9 @@ namespace Scripts.Spells.Generic
         //CorruptinPlagueEntrys
         public const uint CorruptingPlague = 40350;
 
+        //SiegeTankControl
+        public const uint SiegeTankControl = 47963;
+
         //FreezingCircleMisc
         public const uint FreezingCirclePitOfSaronNormal = 69574;
         public const uint FreezingCirclePitOfSaronHeroic = 70276;
@@ -3724,6 +3727,20 @@ namespace Scripts.Spells.Generic
         }
     }
 
+    [Script]
+    class spell_gen_vehicle_control_link : AuraScript
+    {
+        void OnRemove(AuraEffect aurEff, AuraEffectHandleModes mode)
+        {
+            GetTarget().RemoveAurasDueToSpell(SpellIds.SiegeTankControl); //aurEff->GetAmount()
+        }
+
+        public override void Register()
+        {
+            AfterEffectRemove.Add(new EffectApplyHandler(OnRemove, 1, AuraType.Dummy, AuraEffectHandleModes.Real));
+        }
+    }
+    
     [Script] // 34779 - Freezing Circle
     class spell_freezing_circle : SpellScript
     {

Source/Scripts/Spells/Warlock.cs

@@ -233,7 +233,7 @@ namespace Scripts.Spells.Warlock
             {
                 AuraEffect aurEff = aura.GetEffect(1);
                 if (aurEff != null)
-                    aurEff.SetAmount(MathFunctions.CalculatePct(aurEff.GetAmount(), GetHitDamage()));
+                    aurEff.SetAmount(MathFunctions.CalculatePct(GetHitDamage(), aurEff.GetAmount()));
             }
         }
 

sql/updates/world/master/2021_11_24_26_world_2019_03_08_00_world.sql

@@ -0,0 +1,4 @@
+DELETE FROM `spell_script_names` WHERE `ScriptName` = 'spell_gen_vehicle_control_link' AND `spell_id` IN (49078, 50343);
+INSERT INTO `spell_script_names` (`spell_id`,`ScriptName`) VALUES
+(49078, 'spell_gen_vehicle_control_link'),
+(50343, 'spell_gen_vehicle_control_link');