static inline uint32_t get_week_expiration(time_t offer_time)
{
	using namespace boost::gregorian;
	using namespace boost::posix_time;

	first_day_of_the_week_after next_week_start(Monday);
	date epoch(1970, Jan, 1), offer_date = epoch + date_duration(offer_time / 1_day),
				current_date = epoch + date_duration(time(nullptr) / 1_day);
	date_period weekend(next_week_start.get_date(current_date) - date_duration(2), next_week_start.get_date(current_date));

	if (!weekend.contains(offer_date) || !weekend.contains(current_date))
		return 0;

	time_t expiration = static_cast<time_t>((ptime(next_week_start.get_date(current_date)) - ptime(epoch)).total_seconds());

	return expiration;
}