feat(LuaEngine/PlayerHooks): add skill-based player events

src/ElunaLuaEngine_SC.cpp

@@ -812,6 +812,21 @@ class Eluna_PlayerScript : public PlayerScript
     {
         sEluna->OnCreatureKilledByPet(player, killed);
     }
+
+    bool CanPlayerUpdateSkill(Player* player, uint32 skill_id) override
+    {
+        return sEluna->OnCanPlayerUpdateSkill(player, skill_id);
+    }
+
+    void OnBeforePlayerUpdateSkill(Player* player, uint32 skill_id, uint32& value, uint32 max, uint32 step) override
+    {
+        sEluna->OnBeforePlayerUpdateSkill(player, skill_id, value, max, step);
+    }
+
+    void OnPlayerUpdateSkill(Player* player, uint32 skill_id, uint32 value, uint32 max, uint32 step, uint32 new_value) override
+    {
+        sEluna->OnPlayerUpdateSkill(player, skill_id, value, max, step, new_value);
+    }
 };
 
 class Eluna_ServerScript : public ServerScript

src/LuaEngine/Hooks.h

@@ -221,6 +221,9 @@ namespace Hooks
         PLAYER_EVENT_ON_GROUP_ROLL_REWARD_ITEM  =     56,       // (event, player, item, count, voteType, roll)
         PLAYER_EVENT_ON_BG_DESERTION            =     57,       // (event, player, type)
         PLAYER_EVENT_ON_PET_KILL                =     58,       // (event, player, killer)
+        PLAYER_EVENT_ON_CAN_UPDATE_SKILL        =     59,       // (event, player, skill_id) -- Can return true or false
+        PLAYER_EVENT_ON_BEFORE_UPDATE_SKILL     =     60,       // (event, player, skill_id, value, max, step) -- Can return new amount
+        PLAYER_EVENT_ON_UPDATE_SKILL            =     61,       // (event, player, skill_id, value, max, step, new_value)
 
         PLAYER_EVENT_COUNT
     };

src/LuaEngine/LuaEngine.h

@@ -451,6 +451,9 @@ class ELUNA_GAME_API Eluna
     void OnGroupRollRewardItem(Player* player, Item* item, uint32 count, RollVote voteType, Roll* roll);
     void OnBattlegroundDesertion(Player* player, const BattlegroundDesertionType type);
     void OnCreatureKilledByPet(Player* player, Creature* killed);
+    bool OnCanPlayerUpdateSkill(Player* player, uint32 skill_id);
+    void OnBeforePlayerUpdateSkill(Player* player, uint32 skill_id, uint32& value, uint32 max, uint32 step);
+    void OnPlayerUpdateSkill(Player* player, uint32 skill_id, uint32 value, uint32 max, uint32 step, uint32 new_value);
 
     /* Vehicle */
     void OnInstall(Vehicle* vehicle);

src/LuaEngine/hooks/PlayerHooks.cpp

@@ -706,3 +706,50 @@ void Eluna::OnCreatureKilledByPet(Player* player, Creature* killed)
     Push(killed);
     CallAllFunctions(PlayerEventBindings, key);
 }
+
+bool Eluna::OnCanPlayerUpdateSkill(Player* player, uint32 skill_id)
+{
+    START_HOOK_WITH_RETVAL(PLAYER_EVENT_ON_CAN_UPDATE_SKILL, true);
+    Push(player);
+    Push(skill_id);
+    return CallAllFunctionsBool(PlayerEventBindings, key);
+}
+
+void Eluna::OnBeforePlayerUpdateSkill(Player* player, uint32 skill_id, uint32& value, uint32 max, uint32 step)
+{
+    START_HOOK(PLAYER_EVENT_ON_BEFORE_UPDATE_SKILL);
+    Push(player);
+    Push(skill_id);
+    Push(value);
+    Push(max);
+    Push(step);
+
+    int valueIndex = lua_gettop(L) -2;
+    int n = SetupStack(PlayerEventBindings, key, 5);
+    while (n > 0)
+    {
+        int r = CallOneFunction(n--, 5, 1);
+        if (lua_isnumber(L, r))
+        {
+            value = CHECKVAL<uint32>(L, r);
+            // Update the stack for subsequent calls.
+            ReplaceArgument(value, valueIndex);
+        }
+
+        lua_pop(L, 1);
+    }
+
+    CleanUpStack(5);
+}
+
+void Eluna::OnPlayerUpdateSkill(Player* player, uint32 skill_id, uint32 value, uint32 max, uint32 step, uint32 new_value)
+{
+    START_HOOK(PLAYER_EVENT_ON_UPDATE_SKILL);
+    Push(player);
+    Push(skill_id);
+    Push(value);
+    Push(max);
+    Push(step);
+    Push(new_value);
+    CallAllFunctions(PlayerEventBindings, key);
+}