Add function to check if player is immune to everything (divine shield)

LuaFunctions.cpp

@@ -561,6 +561,7 @@ ElunaRegister<Player> PlayerMethods[] =
     { "IsInGroup", &LuaPlayer::IsInGroup },
     { "IsInGuild", &LuaPlayer::IsInGuild },
     { "IsGM", &LuaPlayer::IsGM },
+    { "IsImmuneToDamage", &LuaPlayer::IsImmuneToDamage },
     { "IsAlliance", &LuaPlayer::IsAlliance },
     { "IsHorde", &LuaPlayer::IsHorde },
 #ifndef CLASSIC

PlayerMethods.h

@@ -429,6 +429,13 @@ namespace LuaPlayer
     }
 #endif
 
+    int IsImmuneToDamage(lua_State* L, Player* player)
+    {
+        Eluna::Push(L, player->isTotalImmune());
+
+        return 1;
+    }
+
     /**
      * Returns 'true' if the [Player] satisfies all requirements to complete the quest entry.
      *