Added db logger functions. Chnaged to newest mqtt++ version.

src/LuaEngine.h

@@ -5,12 +5,15 @@
 #include <vector>
 #include <functional>
 #include <string>
+#include "DBLogger.h"
 
 class LuaEngine {
 	private:
 		LuaEngine();
 	public:
 		std::function<void(const TopicState& state)> publish;
+		DBLogger db_logger;
+
 	static LuaEngine& get_instance() {
 		static LuaEngine instance;
 
@@ -24,9 +27,34 @@ class LuaEngine {
 	void start_services();
 	LuaService* create_service(std::string filename);
 	LuaService* service_by_lua_state(lua_State* lua);
-
 	LuaEngine(LuaEngine const&) = delete;
 	void operator=(LuaEngine const&)  = delete;
 };
 
+template<typename Arg, typename... Args>
+inline bool check_arguments(lua_State* lua, int stack_pos) {
+    return check_arguments<Args...>(lua, stack_pos+1) && check_arguments<Arg>(lua, stack_pos);
+}
+ 
+template<typename Arg, typename... Args>
+inline bool check_arguments(lua_State* lua) {
+    int num_arg = sizeof...(Args) + 1;
+    return check_arguments<Arg, Args...>(lua, num_arg * -1);
+}
+ 
+template <>
+inline bool check_arguments<std::string>(lua_State* lua, int stack_pos) {
+    return lua_isstring(lua, stack_pos);
+}
+ 
+template <>
+inline bool check_arguments<int>(lua_State* lua, int stack_pos) {
+    return lua_isnumber(lua, stack_pos);
+}
+ 
+template <>
+inline bool check_arguments<bool>(lua_State* lua, int stack_pos) {
+    return lua_isnumber(lua, stack_pos);
+}
+
 #endif // LUA_ENGINE_H