[Server] Add previous state argument to ON_PLAYER_ATTRIBUTE event

That is array of struct with next content: {base, current, mod, damage}

apps/openmw-mp/processors/player/ProcessorPlayerAttribute.hpp

@@ -12,9 +12,26 @@ namespace mwmp
     class ProcessorPlayerAttribute final: public PlayerProcessor
     {
     public:
+        using OldAState = ESM::StatState<int>;
         ProcessorPlayerAttribute()
         {
             BPP_INIT(ID_PLAYER_ATTRIBUTE)
+
+            Networking::get().getState().getState()->new_usertype<OldAState>("OldAState",
+                                                                             "base", &OldAState::mBase,
+                                                                             "current", &OldAState::mCurrent,
+                                                                             "mod", &OldAState::mMod,
+                                                                             "damage", &OldAState::mDamage);
+        }
+
+        void PreReading(PlayerPacket &packet, const std::shared_ptr<Player> &player)
+        {
+            if (!player->creatureStats.mDead)
+                std::copy(std::begin(player->creatureStats.mAttributes),
+                          std::end(player->creatureStats.mAttributes),
+                          oldValues.begin()
+                );
+
         }
 
         void Do(PlayerPacket &packet, const std::shared_ptr<Player> &player) override
@@ -22,12 +39,13 @@ namespace mwmp
             if (!player->creatureStats.mDead)
             {
                 //myPacket->Send(player, true);
+                Networking::get().getState().getEventCtrl().Call<CoreEvent::ON_PLAYER_ATTRIBUTE, true>(&oldValues, player.get());
 
                 player->sendToLoaded(packet);
-
-                Networking::get().getState().getEventCtrl().Call<CoreEvent::ON_PLAYER_ATTRIBUTE>(player.get());
             }
         }
+    private:
+        std::array<OldAState, ESM::Attribute::Length> oldValues;
     };
 }