31 lines
987 B
Rust
31 lines
987 B
Rust
//! Module containing helper functions to manipulate time
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use chrono::{SecondsFormat, TimeZone, Utc};
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use std::time::{SystemTime, UNIX_EPOCH};
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/// Returns milliseconds since UNIX Epoch
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pub fn now_msec() -> u64 {
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SystemTime::now()
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.duration_since(UNIX_EPOCH)
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.expect("Fix your clock :o")
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.as_millis() as u64
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}
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/// Increment logical clock
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pub fn increment_logical_clock(prev: u64) -> u64 {
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std::cmp::max(prev + 1, now_msec())
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}
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/// Increment two logical clocks
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pub fn increment_logical_clock_2(prev: u64, prev2: u64) -> u64 {
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std::cmp::max(prev2 + 1, std::cmp::max(prev + 1, now_msec()))
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}
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/// Convert a timestamp represented as milliseconds since UNIX Epoch to
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/// its RFC3339 representation, such as "2021-01-01T12:30:00Z"
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pub fn msec_to_rfc3339(msecs: u64) -> String {
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let secs = msecs as i64 / 1000;
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let nanos = (msecs as i64 % 1000) as u32 * 1_000_000;
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let timestamp = Utc.timestamp_opt(secs, nanos).unwrap();
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timestamp.to_rfc3339_opts(SecondsFormat::Millis, true)
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}
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