Core/Unit: Implement more helper methods

Port From (https://github.com/TrinityCore/TrinityCore/commit/104ec7a81a5bb782f81fd05b872bf664e4de1c89)

Source/Game/Entities/Player/Player.DB.cs

@@ -3395,7 +3395,7 @@ namespace Game.Entities
                 stmt.AddValue(index++, (byte)GetClass());
                 stmt.AddValue(index++, (byte)GetNativeGender());   // save gender from PLAYER_BYTES_3, UNIT_BYTES_0 changes with every transform effect
                 stmt.AddValue(index++, GetLevel());
-                stmt.AddValue(index++, m_activePlayerData.XP);
+                stmt.AddValue(index++, GetXP());
                 stmt.AddValue(index++, GetMoney());
                 stmt.AddValue(index++, GetInventorySlotCount());
                 stmt.AddValue(index++, GetBankBagSlotCount());
@@ -3519,7 +3519,7 @@ namespace Game.Entities
                 stmt.AddValue(index++, (byte)GetClass());
                 stmt.AddValue(index++, (byte)GetNativeGender());   // save gender from PLAYER_BYTES_3, UNIT_BYTES_0 changes with every transform effect
                 stmt.AddValue(index++, GetLevel());
-                stmt.AddValue(index++, m_activePlayerData.XP);
+                stmt.AddValue(index++, GetXP());
                 stmt.AddValue(index++, GetMoney());
                 stmt.AddValue(index++, GetInventorySlotCount());
                 stmt.AddValue(index++, GetBankBagSlotCount());

Source/Game/Entities/Player/Player.cs

@@ -232,7 +232,7 @@ namespace Game.Entities
             SetRace(createInfo.RaceId);
             SetClass(createInfo.ClassId);
             SetGender(createInfo.Sex);
-            SetPowerType(powertype);
+            SetPowerType(powertype, false);
             InitDisplayIds();
             UpdatePositionData();
             if ((RealmType)WorldConfig.GetIntValue(WorldCfg.GameType) == RealmType.PVP || (RealmType)WorldConfig.GetIntValue(WorldCfg.GameType) == RealmType.RPPVP)
@@ -5225,7 +5225,7 @@ namespace Game.Entities
 
             _ApplyAllLevelScaleItemMods(false);
 
-            SetLevel(level);
+            SetLevel(level, false);
 
             UpdateSkillsForLevel();
             LearnDefaultSkills();
@@ -6502,9 +6502,8 @@ namespace Game.Entities
             packet.ReferAFriendBonusType = (byte)(recruitAFriend ? 1 : 0);
             SendPacket(packet);
 
-            uint curXP = m_activePlayerData.XP;
-            uint nextLvlXP = m_activePlayerData.NextLevelXP;
-            uint newXP = curXP + xp + bonus_xp;
+            uint nextLvlXP = GetXPForNextLevel();
+            uint newXP = GetXP() + xp + bonus_xp;
 
             while (newXP >= nextLvlXP && level < WorldConfig.GetIntValue(WorldCfg.MaxPlayerLevel))
             {
@@ -6514,7 +6513,7 @@ namespace Game.Entities
                     GiveLevel(level + 1);
 
                 level = GetLevel();
-                nextLvlXP = m_activePlayerData.NextLevelXP;
+                nextLvlXP = GetXPForNextLevel();
             }
 
             SetXP(newXP);

Source/Game/Entities/StatSystem.cs

@@ -535,13 +535,16 @@ namespace Game.Entities
 
         //Powers
         public PowerType GetPowerType() { return (PowerType)(byte)m_unitData.DisplayPower; }
-        public void SetPowerType(PowerType powerType)
+        public void SetPowerType(PowerType powerType, bool sendUpdate = true)
         {
             if (GetPowerType() == powerType)
                 return;
 
             SetUpdateFieldValue(m_values.ModifyValue(m_unitData).ModifyValue(m_unitData.DisplayPower), (byte)powerType);
 
+            if (!sendUpdate)
+                return;
+
             Player thisPlayer = ToPlayer();
             if (thisPlayer != null)
             {

Source/Game/Entities/Unit/Unit.cs

@@ -1674,10 +1674,13 @@ namespace Game.Entities
         }
 
         //Unit
-        public void SetLevel(uint lvl)
+        public void SetLevel(uint lvl, bool sendUpdate = true)
         {
             SetUpdateFieldValue(m_values.ModifyValue(m_unitData).ModifyValue(m_unitData.Level), lvl);
 
+            if (!sendUpdate)
+                return;
+
             Player player = ToPlayer();
             if (player != null)
             {