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#include "civil.h"
#include <util/stream/output.h>
#include <util/stream/format.h>
#include <util/string/ascii.h>
namespace {
bool TryParseInt(TStringBuf& s, int& dst, size_t maxDigits) {
int res = 0;
size_t i = 0;
while (i < maxDigits && !s.empty() && IsAsciiDigit(s[0])) {
res = res * 10 + (s[0] - '0');
++i;
s.Skip(1);
}
if (i == 0) {
return false;
}
dst = res;
return true;
}
bool TryParseUTCOffsetTimezone(TStringBuf name, int& offset) {
static constexpr TStringBuf OFFSET_PREFIX = "UTC";
if (!name.SkipPrefix(OFFSET_PREFIX)) {
return false;
}
if (name.empty()) {
return false;
}
bool negative;
if (name[0] == '+') {
negative = false;
} else if (name[0] == '-') {
negative = true;
} else {
return false;
}
name.Skip(1);
int hour;
int minute = 0;
if (!TryParseInt(name, hour, 2) || hour > 24) {
return false;
}
if (!name.empty()) {
if (name[0] == ':') {
name.Skip(1);
}
if (!TryParseInt(name, minute, 2) || minute >= 60) {
return false;
}
if (!name.empty()) {
return false;
}
}
if (hour == 24 && minute != 0) {
return false;
}
offset = (hour * 60 + minute) * 60;
if (negative)
offset = -offset;
return true;
}
} // anonymous namespace
namespace NDatetime {
TTimeZone GetTimeZone(TStringBuf name) {
int offset;
if (TryParseUTCOffsetTimezone(name, offset)) {
return GetFixedTimeZone(offset);
}
TTimeZone result;
if (!cctz::load_time_zone(static_cast<std::string>(name), &result)) {
ythrow TInvalidTimezone() << "Failed to load time zone " << name << ", " << result.name();
}
return result;
}
TTimeZone GetFixedTimeZone(const long offset) {
return cctz::fixed_time_zone(std::chrono::seconds(offset));
}
TCivilSecond Convert(const TInstant& absTime, const TTimeZone& tz) {
return cctz::convert(TSystemClock::from_time_t(absTime.TimeT()), tz);
}
TCivilSecond Convert(const TInstant& absTime, TStringBuf tzName) {
TTimeZone tz = GetTimeZone(tzName);
return cctz::convert(TSystemClock::from_time_t(absTime.TimeT()), tz);
}
TInstant Convert(const TCivilSecond& tp, const TTimeZone& tz) {
return TInstant::Seconds(cctz::convert(tp, tz).time_since_epoch().count());
}
TCivilSecond AddYears(const TCivilSecond& tp, TDiff diff) {
TCivilYear newYear = Calc<TCivilYear>(tp, diff);
return NDatetime::TCivilSecond(newYear.year(), tp.month(), tp.day(), tp.hour(), tp.minute(), tp.second());
}
TCivilSecond AddMonths(const TCivilSecond& tp, TDiff diff) {
TCivilMonth newMonth = Calc<TCivilMonth>(tp, diff);
return NDatetime::TCivilSecond(newMonth.year(), newMonth.month(), tp.day(), tp.hour(), tp.minute(), tp.second());
}
TCivilSecond AddDays(const TCivilSecond& tp, TDiff diff) {
TCivilDay newDay = Calc<TCivilDay>(tp, diff);
return NDatetime::TCivilSecond(newDay.year(), newDay.month(), newDay.day(), tp.hour(), tp.minute(), tp.second());
}
TCivilSecond AddHours(const TCivilSecond& tp, TDiff diff) {
TCivilHour newHour = Calc<TCivilHour>(tp, diff);
return NDatetime::TCivilSecond(newHour.year(), newHour.month(), newHour.day(), newHour.hour(), tp.minute(), tp.second());
}
TCivilSecond AddMinutes(const TCivilSecond& tp, TDiff diff) {
TCivilMinute newMinute = Calc<TCivilMinute>(tp, diff);
return NDatetime::TCivilSecond(newMinute.year(), newMinute.month(), newMinute.day(), newMinute.hour(), newMinute.minute(), tp.second());
}
TCivilSecond AddSeconds(const TCivilSecond& tp, TDiff diff) {
return Calc<TCivilSecond>(tp, diff);
}
TCivilSecond AddCivil(const TCivilSecond& tp, TCivilDiff diff) {
switch (diff.Unit) {
case ECivilUnit::Second: {
return AddSeconds(tp, diff.Value);
}
case ECivilUnit::Minute: {
return AddMinutes(tp, diff.Value);
}
case ECivilUnit::Hour: {
return AddHours(tp, diff.Value);
}
case ECivilUnit::Day: {
return AddDays(tp, diff.Value);
}
case ECivilUnit::Month: {
return AddMonths(tp, diff.Value);
}
case ECivilUnit::Year: {
return AddYears(tp, diff.Value);
}
default: {
ythrow yexception() << "Unexpected civil unit value " << static_cast<int>(diff.Unit);
}
}
}
TCivilDiff GetCivilDiff(const TCivilSecond& tpX, const TCivilSecond& tpY, ECivilUnit unit) {
switch (unit) {
case ECivilUnit::Second: {
return {tpX - tpY, unit};
}
case ECivilUnit::Minute: {
return {static_cast<TCivilMinute>(tpX) - static_cast<TCivilMinute>(tpY), unit};
}
case ECivilUnit::Hour: {
return {static_cast<TCivilHour>(tpX) - static_cast<TCivilHour>(tpY), unit};
}
case ECivilUnit::Day: {
return {static_cast<TCivilDay>(tpX) - static_cast<TCivilDay>(tpY), unit};
}
case ECivilUnit::Month: {
return {static_cast<TCivilMonth>(tpX) - static_cast<TCivilMonth>(tpY), unit};
}
case ECivilUnit::Year: {
return {static_cast<TCivilYear>(tpX) - static_cast<TCivilYear>(tpY), unit};
}
default: {
ythrow yexception() << "Unexpected civil unit value " << static_cast<int>(unit);
}
}
}
}
template <>
void Out<NDatetime::TCivilYear>(IOutputStream& out, const NDatetime::TCivilYear& y) {
out << y.year();
}
template <>
void Out<NDatetime::TCivilMonth>(IOutputStream& out, const NDatetime::TCivilMonth& m) {
out << NDatetime::TCivilYear(m) << '-' << LeftPad(m.month(), 2, '0');
}
template <>
void Out<NDatetime::TCivilDay>(IOutputStream& out, const NDatetime::TCivilDay& d) {
out << NDatetime::TCivilMonth(d) << '-' << LeftPad(d.day(), 2, '0');
}
template <>
void Out<NDatetime::TCivilHour>(IOutputStream& out, const NDatetime::TCivilHour& h) {
out << NDatetime::TCivilDay(h) << 'T' << LeftPad(h.hour(), 2, '0');
}
template <>
void Out<NDatetime::TCivilMinute>(IOutputStream& out, const NDatetime::TCivilMinute& m) {
out << NDatetime::TCivilHour(m) << ':' << LeftPad(m.minute(), 2, '0');
}
template <>
void Out<NDatetime::TCivilSecond>(IOutputStream& out, const NDatetime::TCivilSecond& s) {
out << NDatetime::TCivilMinute(s) << ':' << LeftPad(s.second(), 2, '0');
}
template <>
void Out<NDatetime::TWeekday>(IOutputStream& out, NDatetime::TWeekday wd) {
using namespace cctz;
switch (wd) {
case weekday::monday:
out << TStringBuf("Monday");
break;
case weekday::tuesday:
out << TStringBuf("Tuesday");
break;
case weekday::wednesday:
out << TStringBuf("Wednesday");
break;
case weekday::thursday:
out << TStringBuf("Thursday");
break;
case weekday::friday:
out << TStringBuf("Friday");
break;
case weekday::saturday:
out << TStringBuf("Saturday");
break;
case weekday::sunday:
out << TStringBuf("Sunday");
break;
}
}
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