TimeTools.h

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#pragma once
 
#include "date.h"
 
namespace timeTools
{
    // No more used because DAS support has been removed
    // Disabled because it needs to include <cmath> which creates a conflict with gsoap 2.8.81 : see https://github.com/F2I-Consulting/fesapi/issues/90
    //std::string convertMicrosecondUnixTimestampToIso(long long ts);
 
    std::string convertUnixTimestampToIso(time_t ts);
 
    time_t convertIsoToUnixTimestamp(const std::string & s);
 
    time_t timegm(std::tm const& t);
 
    template <typename Clock, typename Duration>
    std::tm to_calendar_time(std::chrono::time_point<Clock, Duration> tp)
    {
        using namespace date;
        auto date = floor<days>(tp);
        auto ymd = year_month_day(date);
        auto weekday = year_month_weekday(date).weekday_indexed().weekday();
        auto tod = make_time(tp - date);
        days daysSinceJan1 = date - sys_days(ymd.year() / 1 / 1);
 
        std::tm result;
        result.tm_sec = tod.seconds().count();
        result.tm_min = tod.minutes().count();
        result.tm_hour = tod.hours().count();
        result.tm_mday = (ymd.day() - 0_d).count();
        result.tm_mon = (ymd.month() - January).count();
        result.tm_year = (ymd.year() - 1900_y).count();
        result.tm_wday = (weekday - Sunday).count();
        result.tm_yday = daysSinceJan1.count();
        result.tm_isdst = -1; // Information not available
        return result;
    }
}