lokinet/llarp/util/time.hpp
Jason Rhinelander b6924f3ef1
Replace duration/timestamp formats with functions
We're defining formats for std::chrono types, which feels wrong (because
fmt itself also has these), so just replace them with functions:

short_time_from_now(...) gives a short "in 14m12s" or "5.123s ago" time
span relative to now, given a time point.  Precision gets reduced for
larger deviations from now (e.g. "4h12m ago").

ToString(Duration_t) gives a string such as "-3h22m02.123s" for a
duration.
2022-10-26 21:20:14 -03:00

50 lines
1.3 KiB
C++

#pragma once
#include "types.hpp"
#include <nlohmann/json.hpp>
#include <iostream>
#include <fmt/format.h>
#include <fmt/chrono.h>
using namespace std::chrono_literals;
namespace llarp
{
/// get time right now as milliseconds, this is monotonic
Duration_t
time_now_ms();
/// get the uptime of the process
Duration_t
uptime();
/// convert to milliseconds
uint64_t
ToMS(Duration_t duration);
nlohmann::json
to_json(const Duration_t& t);
// Returns a string such as "27m13s ago" or "in 1h12m" or "now". You get precision of minutes
// (for >=1h), seconds (>=10s), or milliseconds. The `now_threshold` argument controls how close
// to current time (default 1s) the time has to be to get the "now" argument.
std::string
short_time_from_now(const TimePoint_t& t, const Duration_t& now_threshold = 1s);
// Makes a duration human readable. This always has full millisecond precision, but formats up to
// hours. E.g. "-4h04m12.123s" or "1234h00m09.876s.
std::string
ToString(Duration_t t);
} // namespace llarp
// Duration_t is currently just a typedef to std::chrono::milliseconds, and specializing
// that seems wrong; leaving this here to remind us not to add it back in again.
// namespace fmt
//{
// template <>
// struct formatter<llarp::Duration_t>
// {
// };
//} // namespace fmt