tdesktop/Telegram/SourceFiles/data/data_birthday.cpp

/*
This file is part of Telegram Desktop,
the official desktop application for the Telegram messaging service.

For license and copyright information please follow this link:
https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
*/
#include "data/data_birthday.h"

namespace Data {
namespace {

[[nodiscard]] bool Validate(int day, int month, int year) {
	if (year != 0
		&& (year < Birthday::kYearMin || year > Birthday::kYearMax)) {
		return false;
	} else if (day < 1) {
		return false;
	} else if (month == 2) {
		if (day == 29) {
			return !year
				|| (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0));
		}
		return day <= 28;
	} else if (month == 4 || month == 6 || month == 9 || month == 11) {
		return day <= 30;
	} else if (month > 0 && month <= 12) {
		return day <= 31;
	}
	return false;
}

[[nodiscard]] int Serialize(int day, int month, int year) {
	return day + month * 100 + year * 10000;
}

} // namespace

Birthday::Birthday() = default;

Birthday::Birthday(int day, int month, int year)
: _value(Validate(day, month, year) ? Serialize(day, month, year) : 0) {
}

Birthday Birthday::FromSerialized(int value) {
	return Birthday(value % 100, (value / 100) % 100, value / 10000);
}

int Birthday::serialize() const {
	return _value;
}

bool Birthday::valid() const {
	return _value != 0;
}

int Birthday::day() const {
	return _value % 100;
}

int Birthday::month() const {
	return (_value / 100) % 100;
}

int Birthday::year() const {
	return _value / 10000;
}

} // namespace Data