utc_time.h

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#pragma once

#include "synchronization.h"

#include <string>
#include <ctime>

BEGIN_NAMESPACE_SYNCHRONIZATION

class UTCTime final
{
public:

    UTCTime(int32_t hours, int32_t minutes, double seconds, int32_t day, int32_t month, int32_t year) noexcept;

    UTCTime(int64_t unixTime, double secondsFraction) noexcept;

    explicit UTCTime(double dateTime) noexcept;

    int32_t getHours() const;

    int32_t getMinutes() const;

    int32_t getSeconds() const;

    double getSecondsFraction() const;

    int32_t getDay() const;

    int32_t getMonth() const;

    int32_t getYear() const;

    double getDateTimeValue() const;

    int64_t getUnixTimeValue() const;

    static double RelativeSecondsBetween(const UTCTime& start, const UTCTime& end);

    static UTCTime IncrementSeconds(const UTCTime& time, double secondsIncrement);

    static constexpr double DateTimeAtUnixStart = 25569.0;

private:
    int32_t hours, minutes, seconds;
    double secondsFraction;
    int32_t day, month, year;

    double dateTime;
    int64_t unixTime;

    void calculateUnixAndDateTime(const std::time_t& time);
    static std::time_t TmToTimeT(std::tm& tm);
    static std::tm TimeTToTm(std::time_t& time);
    void setTime(std::time_t& time);
};

END_NAMESPACE_SYNCHRONIZATION