Added support for time scheduled lua scripts

src/LuaEngine.h

@@ -6,6 +6,20 @@
 #include <functional>
 #include <string>
 #include "DBLogger.h"
+#include "croncpp/croncpp.h"
+#include <ctime>
+#include <queue>
+
+struct ScheduledService {
+	cron::cronexpr cron;
+	std::time_t next_run;
+	LuaService* service;
+	std::string callback;
+
+	void next();
+	bool operator<(const ScheduledService& rhs) const;
+};
+
 
 class LuaEngine {
 	private:
@@ -13,6 +27,7 @@ class LuaEngine {
 	public:
 		std::function<void(const TopicState& state)> publish;
 		DBLogger db_logger;
+		std::priority_queue<ScheduledService> time_schedule;
 
 	static LuaEngine& get_instance() {
 		static LuaEngine instance;
@@ -23,6 +38,7 @@ class LuaEngine {
 	
 	Cache cache;
 
+
 	void load_services();
 	void start_services();
 	LuaService* create_service(std::string filename);