//////////////////////////////////////////////////////////////////////////////////
// Name:      actDate.h
// Product:   cv act library
// Purpose:   The Date function used in act Library
//
// Copyright: (c) 2000 cv cryptovision GmbH
//            all rights reserved
// Licence:   The conditions for the use of this software are regulated 
//            in the cv act library licence agreement.
//////////////////////////////////////////////////////////////////////////////////

#ifndef ACT_Date_h
#define ACT_Date_h

#include "actBasics.h"

#if defined(ACT_POSIX)
#	include <time.h>
#endif

namespace act
{
	class Blob;

	class Date
	{		
	public:
		Date(); //today
		Date(int day, int month ,int year);		
		Date(int day, int month, int year, int hour, int minute, int sec);
		Date(const Blob& der);

		Date(const unsigned char* ch, const unsigned int size);

		Date& SetToday();
		
		int GetDay() const { return m_day; }
		int GetMonth() const { return m_month; } 
		int GetYear() const { return m_year; }
		int GetHour() const { return m_hour; }
		int GetMinute() const { return m_min; }
		int GetSecond() const { return m_sec; }		

		void  IgnoreTime(bool b); // ignore time(hour, min,sec) in the operators
		const Date& operator=(const Date&);
		bool operator>(const Date&) const;
		bool operator>=(const Date&) const;
		bool operator<(const Date&) const;
		bool operator<=(const Date&) const;
		bool operator==(const Date&) const;
		bool operator!=(const Date&) const;

		const Date& AddMonths(int m);
		const Date& SubMonths(int m);
		const Date& AddYears(int y);
		const Date& SubYears(int y);
		const Date& AddDays(int d);
		const Date& SubDays(int d);
		const Date& AddHours(int h);
		const Date& SubHours(int h);		
		const Date& AddMinutes(int m);
		const Date& SubMinutes(int m);					
		const Date& AddSecond(int m);
		const Date& SubSecond(int m);					

		int DayOfWeek() const;	// 0:Sunday, 1=Monday ... 6=Saturday
		int IsLeap(int y) const;	// 1:leapyear, 0:else
		int DaysPerMonth(int m, int y) const;
		long GetDifference(const Date& d2) const;

		long GetJulian() const;
		long GetJulian(int d, int m, int y) const;
		void ConvertFromJulian(long jd, int& d, int& m, int& y);

		Blob Encode() const;
		size_t Encode(Blob& encoded) const;

		Blob EncodeToGeneralizedTime() const;
		Blob GetGeneralizedTimeString() const;
		Blob GetLocalTimeString() const; // fixed format: "DD/MM/YYYY HH:MM:SS"

		operator Blob() const;

		int GetDayFromWeekDay (int weekday, int year, int month, int which);

#if defined(ACT_POSIX)
		static void copyDatetm(act::Date a, struct tm& b);
		static void copytmDate(struct tm a, act::Date& b);
#endif

	private:
		Date& SetYear(int year)			{ m_year = year;	return *this; }
		Date& SetMonth(int month)		{ m_month = month;	return *this; }
		Date& SetDay(int day)			{ m_day = day;		return *this; }
		Date& SetHour(int hour)			{ m_hour = hour;	return *this; }
		Date& SetMinute(int minute)		{ m_min = minute;	return *this; }
		Date& SetSecond(int sec)		{ m_sec = sec;		return *this; }
		bool IsValid() const;
		void AdjustDays();

	private:		
		int m_day, m_month, m_year;
		int m_hour, m_min, m_sec;		
		bool m_ignore_time;	
	};

} // namespace act

#endif // ACT_Date_h