Core/AreaTriggers: Implement visibility of serverside areatriggers with .debug areatrigger command

src/server/game/Entities/AreaTrigger/AreaTrigger.cpp

@@ -274,6 +274,13 @@ bool AreaTrigger::CreateServer(Map* map, AreaTriggerTemplate const* areaTriggerT
 
     SetObjectScale(1.0f);
 
+    auto areaTriggerData = m_values.ModifyValue(&AreaTrigger::m_areaTriggerData);
+    SetUpdateFieldValue(areaTriggerData.ModifyValue(&UF::AreaTriggerData::BoundsRadius2D), GetMaxSearchRadius());
+    SetUpdateFieldValue(areaTriggerData.ModifyValue(&UF::AreaTriggerData::DecalPropertiesID), 24); // blue decal, for .debug areatrigger visibility
+
+    SetUpdateFieldValue(areaTriggerData.ModifyValue(&UF::AreaTriggerData::ExtraScaleCurve).ModifyValue(&UF::ScaleCurve::ParameterCurve), std::bit_cast<uint32>(1.0000001f));
+    SetUpdateFieldValue(areaTriggerData.ModifyValue(&UF::AreaTriggerData::ExtraScaleCurve).ModifyValue(&UF::ScaleCurve::OverrideActive), true);
+
     _shape = position.Shape;
     _maxSearchRadius = _shape.GetMaxSearchRadius();
 
@@ -1021,6 +1028,22 @@ void AreaTrigger::AI_Destroy()
     _ai.reset();
 }
 
+bool AreaTrigger::IsNeverVisibleFor(WorldObject const* seer, bool allowServersideObjects) const
+{
+    if (WorldObject::IsNeverVisibleFor(seer, allowServersideObjects))
+        return true;
+
+    if (IsServerSide() && !allowServersideObjects)
+    {
+        if (Player const* seerPlayer = seer->ToPlayer())
+            return !seerPlayer->isDebugAreaTriggers;
+
+        return true;
+    }
+
+    return false;
+}
+
 void AreaTrigger::BuildValuesCreate(ByteBuffer* data, Player const* target) const
 {
     UF::UpdateFieldFlag flags = GetUpdateFieldFlagsFor(target);

src/server/game/Entities/AreaTrigger/AreaTrigger.h

@@ -75,7 +75,7 @@ class TC_GAME_API AreaTrigger : public WorldObject, public GridObject<AreaTrigge
 
         bool IsServerSide() const { return _areaTriggerTemplate->Id.IsServerSide; }
 
-        bool IsNeverVisibleFor(WorldObject const* seer, bool allowServersideObjects = false) const override { return WorldObject::IsNeverVisibleFor(seer) || (IsServerSide() && !allowServersideObjects); }
+        bool IsNeverVisibleFor(WorldObject const* seer, bool allowServersideObjects = false) const override;
 
     private:
         bool Create(uint32 areaTriggerCreatePropertiesId, Unit* caster, Unit* target, SpellInfo const* spell, Position const& pos, int32 duration, SpellCastVisual spellVisual, ObjectGuid const& castId, AuraEffect const* aurEff);

src/server/scripts/Commands/cs_debug.cpp

@@ -515,6 +515,7 @@ public:
             handler->PSendSysMessage(LANG_DEBUG_AREATRIGGER_OFF);
             player->isDebugAreaTriggers = false;
         }
+        player->UpdateObjectVisibility();
         return true;
     }