Core/AreaTrigger: Implement AreaTriggerActionSetFlag::DontDespawnWithCreator (#30832)

(cherry picked from commit c40b6e0b3f1882a9fce8dfd103be4291ca986851)

3 files changed, 18 insertions, 6 deletions

diff --git a/src/server/game/DataStores/DBCEnums.h b/src/server/game/DataStores/DBCEnums.h
index fdd3562ef53..e241b4b66d4 100644
--- a/src/server/game/DataStores/DBCEnums.h
+++ b/src/server/game/DataStores/DBCEnums.h
@@ -191,7 +191,7 @@ enum class AreaTriggerActionSetFlag : uint32
     CreatorsPartyOnly               = 0x0100,
     DontRunOnLeaveWhenExpiring      = 0x0200, /*NYI*/
     CanAffectUninteractible         = 0x0400,
-    DontDespawnWithCreator          = 0x0800, /*NYI*/
+    DontDespawnWithCreator          = 0x0800,
     CanAffectBeastmaster            = 0x1000, // Can affect GMs
     RequiresLineOfSight             = 0x2000  /*NYI*/
 };
diff --git a/src/server/game/Entities/Unit/Unit.cpp b/src/server/game/Entities/Unit/Unit.cpp
index 3ca60e94320..642c68e937c 100644
--- a/src/server/game/Entities/Unit/Unit.cpp
+++ b/src/server/game/Entities/Unit/Unit.cpp
@@ -5435,10 +5435,15 @@ void Unit::RemoveAreaTrigger(AuraEffect const* aurEff)
     }
 }
 
-void Unit::RemoveAllAreaTriggers()
+void Unit::RemoveAllAreaTriggers(AreaTriggerRemoveReason reason /*= AreaTriggerRemoveReason::Default*/)
 {
-    while (!m_areaTrigger.empty())
-        m_areaTrigger.back()->Remove();
+    for (AreaTrigger* at : AreaTriggerList(std::move(m_areaTrigger)))
+    {
+        if (reason == AreaTriggerRemoveReason::UnitDespawn && at->GetTemplate()->ActionSetFlags.HasFlag(AreaTriggerActionSetFlag::DontDespawnWithCreator))
+            continue;
+
+        at->Remove();
+    }
 }
 
 void Unit::SendSpellNonMeleeDamageLog(SpellNonMeleeDamage const* log)
@@ -9905,7 +9910,7 @@ void Unit::RemoveFromWorld()
 
         RemoveAllGameObjects();
         RemoveAllDynObjects();
-        RemoveAllAreaTriggers();
+        RemoveAllAreaTriggers(AreaTriggerRemoveReason::UnitDespawn);
 
         ExitVehicle();  // Remove applied auras with SPELL_AURA_CONTROL_VEHICLE
         UnsummonAllTotems();
diff --git a/src/server/game/Entities/Unit/Unit.h b/src/server/game/Entities/Unit/Unit.h
index 1804a8cfb19..f579d8e9b8e 100644
--- a/src/server/game/Entities/Unit/Unit.h
+++ b/src/server/game/Entities/Unit/Unit.h
@@ -1613,9 +1613,16 @@ class TC_GAME_API Unit : public WorldObject
         void _UnregisterAreaTrigger(AreaTrigger* areaTrigger);
         AreaTrigger* GetAreaTrigger(uint32 spellId) const;
         std::vector<AreaTrigger*> GetAreaTriggers(uint32 spellId) const;
+
+        enum class AreaTriggerRemoveReason : uint8
+        {
+            Default,
+            UnitDespawn
+        };
+
         void RemoveAreaTrigger(uint32 spellId);
         void RemoveAreaTrigger(AuraEffect const* aurEff);
-        void RemoveAllAreaTriggers();
+        void RemoveAllAreaTriggers(AreaTriggerRemoveReason reason = AreaTriggerRemoveReason::Default);
 
         void ModifyAuraState(AuraStateType flag, bool apply);
         uint32 BuildAuraStateUpdateForTarget(Unit const* target) const;