Use boost::optional and boost::none instead of smelly pointer (#24134)

* Remove bad pointer usage from CharacterCache

Use TrinityCore Option type instead which is intended for this purpose. (Wrapper around boost::option until C++17 bump is finalised)

* Unify codestyle regarding TC optional type

Based upon advice from @Shauren

(cherry picked from commit 76831f1f46)

src/server/game/Cache/CharacterCache.cpp

@@ -117,7 +117,7 @@ void CharacterCache::DeleteCharacterCacheEntry(ObjectGuid const& guid, std::stri
     _characterCacheByNameStore.erase(name);
 }
 
-void CharacterCache::UpdateCharacterData(ObjectGuid const& guid, std::string const& name, uint8* gender /*= nullptr*/, uint8* race /*= nullptr*/)
+void CharacterCache::UpdateCharacterData(ObjectGuid const& guid, std::string const& name, Optional<uint8> gender /*= {}*/, Optional<uint8> race /*= {}*/)
 {
     auto itr = _characterCacheStore.find(guid);
     if (itr == _characterCacheStore.end())

src/server/game/Cache/CharacterCache.h

@@ -20,6 +20,7 @@
 
 #include "Define.h"
 #include "ObjectGuid.h"
+#include "Optional.h"
 #include <string>
 
 struct CharacterCacheEntry
@@ -47,7 +48,7 @@ class TC_GAME_API CharacterCache
         void AddCharacterCacheEntry(ObjectGuid const& guid, uint32 accountId, std::string const& name, uint8 gender, uint8 race, uint8 playerClass, uint8 level, bool isDeleted);
         void DeleteCharacterCacheEntry(ObjectGuid const& guid, std::string const& name);
 
-        void UpdateCharacterData(ObjectGuid const& guid, std::string const& name, uint8* gender = nullptr, uint8* race = nullptr);
+        void UpdateCharacterData(ObjectGuid const& guid, std::string const& name, Optional<uint8> gender = {}, Optional<uint8> race = {});
         void UpdateCharacterGender(ObjectGuid const& guid, uint8 gender);
         void UpdateCharacterLevel(ObjectGuid const& guid, uint8 level);
         void UpdateCharacterAccountId(ObjectGuid const& guid, uint32 accountId);

src/server/game/Garrison/Garrison.cpp

@@ -815,7 +815,7 @@ void Garrison::Plot::ClearBuildingInfo(GarrisonType garrisonType, Player* owner)
     plotPlaced.PlotInfo = &PacketInfo;
     owner->SendDirectMessage(plotPlaced.Write());
 
-    BuildingInfo.PacketInfo = boost::none;
+    BuildingInfo.PacketInfo.reset();
 }
 
 void Garrison::Plot::SetBuildingInfo(WorldPackets::Garrison::GarrisonBuildingInfo const& buildingInfo, Player* owner)

src/server/game/Handlers/CharacterHandler.cpp

@@ -1842,7 +1842,7 @@ void WorldSession::HandleCharCustomizeCallback(std::shared_ptr<WorldPackets::Cha
 
     CharacterDatabase.CommitTransaction(trans);
 
-    sCharacterCache->UpdateCharacterData(customizeInfo->CharGUID, customizeInfo->CharName, &customizeInfo->SexID);
+    sCharacterCache->UpdateCharacterData(customizeInfo->CharGUID, customizeInfo->CharName, customizeInfo->SexID);
 
     SendCharCustomize(RESPONSE_SUCCESS, customizeInfo.get());
 
@@ -2167,7 +2167,7 @@ void WorldSession::HandleCharRaceOrFactionChangeCallback(std::shared_ptr<WorldPa
         trans->Append(stmt);
     }
 
-    sCharacterCache->UpdateCharacterData(factionChangeInfo->Guid, factionChangeInfo->Name, &factionChangeInfo->SexID, &factionChangeInfo->RaceID);
+    sCharacterCache->UpdateCharacterData(factionChangeInfo->Guid, factionChangeInfo->Name, factionChangeInfo->SexID, factionChangeInfo->RaceID);
 
     if (oldRace != factionChangeInfo->RaceID)
     {

src/server/game/Scripting/ScriptReloadMgr.cpp

@@ -278,7 +278,7 @@ Optional<std::shared_ptr<ScriptModule>>
                          path.generic_string().c_str());
         }
 
-        return boost::none;
+        return {};
     }
 
     // Use RAII to release the library on failure.
@@ -305,7 +305,7 @@ Optional<std::shared_ptr<ScriptModule>>
         TC_LOG_ERROR("scripts.hotswap", "Could not extract all required functions from the shared library \"%s\"!",
             path.generic_string().c_str());
 
-        return boost::none;
+        return {};
     }
 }
 

src/server/game/Spells/SpellEffects.cpp

@@ -2148,8 +2148,6 @@ void Spell::EffectDispel()
         WorldPackets::CombatLog::SpellDispellData dispellData;
         dispellData.SpellID = dispelableAura.GetAura()->GetId();
         dispellData.Harmful = false;      // TODO: use me
-        dispellData.Rolled = boost::none; // TODO: use me
-        dispellData.Needed = boost::none; // TODO: use me
 
         unitTarget->RemoveAurasDueToSpellByDispel(dispelableAura.GetAura()->GetId(), m_spellInfo->Id, dispelableAura.GetAura()->GetCasterGUID(), m_caster, dispelableAura.GetDispelCharges());
 
@@ -4568,8 +4566,6 @@ void Spell::EffectStealBeneficialBuff()
         WorldPackets::CombatLog::SpellDispellData dispellData;
         dispellData.SpellID = dispell.first;
         dispellData.Harmful = false;      // TODO: use me
-        dispellData.Rolled = boost::none; // TODO: use me
-        dispellData.Needed = boost::none; // TODO: use me
 
         unitTarget->RemoveAurasDueToSpellBySteal(dispell.first, dispell.second, m_caster);