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#include "snowflake.hpp"
#include <chrono>
#include <ctime>
#include <iomanip>
constexpr static uint64_t DiscordEpochSeconds = 1420070400;
const Snowflake Snowflake::Invalid = -1ULL;
Snowflake::Snowflake()
: m_num(Invalid) {}
Snowflake::Snowflake(uint64_t n)
: m_num(n) {}
Snowflake::Snowflake(const std::string &str) {
if (!str.empty())
m_num = std::stoull(str);
else
m_num = Invalid;
}
Snowflake::Snowflake(const Glib::ustring &str) {
if (!str.empty())
m_num = std::strtoull(str.c_str(), nullptr, 10);
else
m_num = Invalid;
}
Snowflake Snowflake::FromNow() {
using namespace std::chrono;
// not guaranteed to work but it probably will anyway
static uint64_t counter = 0;
const auto millis_since_epoch = static_cast<uint64_t>(duration_cast<milliseconds>(system_clock::now().time_since_epoch()).count());
const auto epoch = millis_since_epoch - DiscordEpochSeconds * 1000;
uint64_t snowflake = epoch << 22;
// worker id and process id would be OR'd in here but there's no point
snowflake |= counter++ % 4096;
return snowflake;
}
Snowflake Snowflake::FromISO8601(std::string_view ts) {
int yr, mon, day, hr, min, sec, tzhr, tzmin;
float milli;
if (std::sscanf(ts.data(), "%d-%d-%dT%d:%d:%d%f+%d:%d",
&yr, &mon, &day, &hr, &min, &sec, &milli, &tzhr, &tzmin) != 9) return Snowflake::Invalid;
const auto epoch = util::TimeToEpoch(yr, mon, day, hr, min, sec);
if (epoch < DiscordEpochSeconds) return Snowflake::Invalid;
return SecondsInterval * (epoch - DiscordEpochSeconds) + static_cast<uint64_t>(milli * static_cast<float>(SecondsInterval));
}
bool Snowflake::IsValid() const {
return m_num != Invalid;
}
Glib::ustring Snowflake::GetLocalTimestamp() const {
const time_t secs_since_epoch = (m_num / SecondsInterval) + DiscordEpochSeconds;
const std::tm tm = *localtime(&secs_since_epoch);
std::array<char, 256> tmp {};
std::strftime(tmp.data(), sizeof(tmp), "%X %x", &tm);
return tmp.data();
}
void from_json(const nlohmann::json &j, Snowflake &s) {
if (j.is_string()) {
std::string tmp;
j.get_to(tmp);
s.m_num = std::stoull(tmp);
} else {
j.get_to(s.m_num);
}
}
void to_json(nlohmann::json &j, const Snowflake &s) {
j = std::to_string(s);
}
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