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use std::{ops::ControlFlow, time::Duration};
#[allow(clippy::module_name_repetitions)]
pub fn format_duration(f: Duration) -> String {
fn item(name: &str, value: u64) -> ControlFlow<String> {
if value > 0 {
ControlFlow::Break(format!("{}{}", value, name))
} else {
ControlFlow::Continue(())
}
}
// impl taken and modified from
// https://github.com/tailhook/humantime/blob/master/src/duration.rs#L295-L331
// Copyright (c) 2016 The humantime Developers
fn fmt(f: Duration) -> ControlFlow<String, ()> {
let secs = f.as_secs();
let nanos = f.subsec_nanos();
let years = secs / 31_557_600; // 365.25d
let year_days = secs % 31_557_600;
let months = year_days / 2_630_016; // 30.44d
let month_days = year_days % 2_630_016;
let days = month_days / 86400;
let day_secs = month_days % 86400;
let hours = day_secs / 3600;
let minutes = day_secs % 3600 / 60;
let seconds = day_secs % 60;
let millis = nanos / 1_000_000;
// a difference from our impl than the original is that
// we only care about the most-significant segment of the duration.
// If the item call returns `Break`, then the `?` will early-return.
// This allows for a very consise impl
item("y", years)?;
item("mo", months)?;
item("d", days)?;
item("h", hours)?;
item("m", minutes)?;
item("s", seconds)?;
item("ms", u64::from(millis))?;
ControlFlow::Continue(())
}
match fmt(f) {
ControlFlow::Break(b) => b,
ControlFlow::Continue(()) => String::from("0s"),
}
}
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