time.hpp

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#pragma once
 
 
#include <chrono>
#include <cstdint>
#include <format>
#include <string>
 
namespace itch {
 
using ItchTimePoint = std::chrono::sys_time<std::chrono::nanoseconds>;
 
[[nodiscard]] constexpr auto to_time_point(
    std::chrono::year_month_day session_date, std::uint64_t nanos_past_midnight
) noexcept -> ItchTimePoint {
    return std::chrono::sys_days {session_date} + std::chrono::nanoseconds {nanos_past_midnight};
}
 
[[nodiscard]] inline auto format_timestamp(std::uint64_t nanos_past_midnight) -> std::string {
    const std::chrono::hh_mm_ss time_of_day {std::chrono::nanoseconds {nanos_past_midnight}};
    return std::format("{:%T}", time_of_day);
}
 
[[nodiscard]] inline auto format_time_point(
    std::chrono::year_month_day session_date, std::uint64_t nanos_past_midnight
) -> std::string {
    return std::format("{:%F %T}", to_time_point(session_date, nanos_past_midnight));
}
 
}  // namespace itch