YiDateTime.h

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// © You i Labs Inc. 2000-2017. All rights reserved.
#ifndef _YI_DATE_TIME_H_
#define _YI_DATE_TIME_H_

#include "framework/YiPredef.h"
#include "utility/YiString.h"

class CYIDateTime
{
public:
    CYIDateTime(const CYIString &rDateTimeString);

    CYIDateTime(const time_t epochTime);

    CYIDateTime();

    virtual ~CYIDateTime();

    bool IsValid() const;

    uint32_t GetDay() const;

    bool SetDay(uint32_t uDay);

    uint32_t GetMonth() const;

    bool SetMonth(uint32_t uMonth);

    uint32_t GetYear() const;

    bool SetYear(uint32_t uYear);

    uint32_t GetHour() const;

    bool SetHour(uint32_t uHour);

    uint32_t GetMinute() const;

    bool SetMinute(uint32_t uMinute);

    uint32_t GetSecond() const;

    bool SetSecond(uint32_t uSecond);

    CYIString GetMonthName() const;

    CYIString GetMonthShortName() const;

    uint32_t GetDayOfWeek() const;

    CYIString GetDayOfWeekName() const;

    CYIString GetDayOfWeekShortName() const;

    static CYIDateTime GetCurrentDateTime();

    bool SetDateTime(const CYIString &rDateTimeString);
    
    bool SetDateTimeRFC1123(const CYIString &rDateTimeString);

    CYIString FormatString(const CYIString &rFormatString) const;

    CYIString FormatString() const;

    time_t GetEpochTime() const;

    bool SetEpochTime(const time_t epochTime);

    double GetSecondsUntil(const CYIDateTime &rTargetDateTime) const;

    static double GetDifferenceBetween(const CYIDateTime &rFirstDateTime, const CYIDateTime &rSecondDateTime);
    
    static uint32_t GetDaysInMonth(const uint32_t uMonth, const uint32_t uYear);

    static bool IsLeapYear(const uint32_t uYear);

    bool AddYears(const int32_t nYears);

    bool AddMonths(const int32_t nMonths);

    bool AddDays(const int32_t nDays);

    bool AddHours(const int32_t nHours);

    bool AddMinutes(const int32_t nMinutes);

    bool AddSeconds(const int32_t nSeconds);

    virtual bool     operator==(const CYIDateTime &rOther) const;
    virtual bool     operator!=(const CYIDateTime &rOther) const;
    virtual bool     operator> (const CYIDateTime &rOther) const;
    virtual bool     operator< (const CYIDateTime &rOther) const;
    virtual bool     operator>=(const CYIDateTime &rOther) const;
    virtual bool     operator<=(const CYIDateTime &rOther) const;
    virtual bool     operator+=(const CYIDateTime &rOther);
    virtual bool     operator-=(const CYIDateTime &rOther);
    virtual CYIDateTime operator+ (const CYIDateTime &rOther) const;
    virtual CYIDateTime operator- (const CYIDateTime &rOther) const;    

private:
    CYIDateTime(const tm &rDateTime);
    struct tm m_dateTime;
    time_t  m_epochTime;
    static bool ParseDate(const std::string &rDateTimeString, tm &rDateTime, time_t &rEpochTime);
    static CYIString ConvertFormatToWindowsStyle(const CYIString &rFormatString);
};

std::ostream & operator<<(std::ostream &rStream, const CYIDateTime &rVal);

#endif /* _YI_DATE_TIME_H_ */