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https://github.com/GothenburgBitFactory/taskwarrior.git
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parse durations and timestamps
This commit is contained in:
Dustin J. Mitchell
Dustin J. Mitchell
parent
288f29d9d5
commit
0259a5e2e2
9 changed files with 649 additions and 23 deletions
529
cli/src/argparse/args/time.rs
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529
cli/src/argparse/args/time.rs
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@ -0,0 +1,529 @@
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use chrono::{prelude::*, Duration};
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use iso8601_duration::Duration as IsoDuration;
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use lazy_static::lazy_static;
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use nom::{
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branch::*,
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bytes::complete::*,
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character::complete::*,
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character::*,
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combinator::*,
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error::{Error, ErrorKind},
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multi::*,
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sequence::*,
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Err, IResult,
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};
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use std::str::FromStr;
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// https://taskwarrior.org/docs/dates.html
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// https://taskwarrior.org/docs/named_dates.html
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// https://taskwarrior.org/docs/durations.html
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/// A case for matching durations. If `.3` is true, then the value can be used
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/// without a prefix, e.g., `minute`. If false, it cannot, e.g., `minutes`
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#[derive(Debug)]
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struct DurationCase(&'static str, Duration, bool);
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// https://github.com/GothenburgBitFactory/libshared/blob/9a5f24e2acb38d05afb8f8e316a966dee196a42a/src/Duration.cpp#L50
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// TODO: use const when chrono supports it
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lazy_static! {
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static ref DURATION_CASES: Vec<DurationCase> = vec![
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DurationCase("annual", Duration::days(365), true),
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DurationCase("biannual", Duration::days(730), true),
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DurationCase("bimonthly", Duration::days(61), true),
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DurationCase("biweekly", Duration::days(14), true),
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DurationCase("biyearly", Duration::days(730), true),
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DurationCase("daily", Duration::days(1), true),
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DurationCase("days", Duration::days(1), false),
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DurationCase("day", Duration::days(1), true),
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DurationCase("d", Duration::days(1), false),
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DurationCase("fortnight", Duration::days(14), true),
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DurationCase("hours", Duration::hours(1), false),
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DurationCase("hour", Duration::hours(1), true),
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DurationCase("hrs", Duration::hours(1), false),
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DurationCase("hr", Duration::hours(1), true),
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DurationCase("h", Duration::hours(1), false),
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DurationCase("minutes", Duration::minutes(1), false),
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DurationCase("minute", Duration::minutes(1), true),
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DurationCase("mins", Duration::minutes(1), false),
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DurationCase("min", Duration::minutes(1), true),
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DurationCase("monthly", Duration::days(30), true),
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DurationCase("months", Duration::days(30), false),
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DurationCase("month", Duration::days(30), true),
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DurationCase("mnths", Duration::days(30), false),
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DurationCase("mths", Duration::days(30), false),
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DurationCase("mth", Duration::days(30), true),
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DurationCase("mos", Duration::days(30), false),
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DurationCase("mo", Duration::days(30), true),
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DurationCase("m", Duration::days(30), false),
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DurationCase("quarterly", Duration::days(91), true),
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DurationCase("quarters", Duration::days(91), false),
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DurationCase("quarter", Duration::days(91), true),
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DurationCase("qrtrs", Duration::days(91), false),
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DurationCase("qrtr", Duration::days(91), true),
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DurationCase("qtrs", Duration::days(91), false),
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DurationCase("qtr", Duration::days(91), true),
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DurationCase("q", Duration::days(91), false),
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DurationCase("semiannual", Duration::days(183), true),
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DurationCase("sennight", Duration::days(14), false),
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DurationCase("seconds", Duration::seconds(1), false),
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DurationCase("second", Duration::seconds(1), true),
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DurationCase("secs", Duration::seconds(1), false),
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DurationCase("sec", Duration::seconds(1), true),
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DurationCase("s", Duration::seconds(1), false),
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DurationCase("weekdays", Duration::days(1), true),
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DurationCase("weekly", Duration::days(7), true),
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DurationCase("weeks", Duration::days(7), false),
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DurationCase("week", Duration::days(7), true),
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DurationCase("wks", Duration::days(7), false),
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DurationCase("wk", Duration::days(7), true),
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DurationCase("w", Duration::days(7), false),
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DurationCase("yearly", Duration::days(365), true),
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DurationCase("years", Duration::days(365), false),
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DurationCase("year", Duration::days(365), true),
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DurationCase("yrs", Duration::days(365), false),
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DurationCase("yr", Duration::days(365), true),
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DurationCase("y", Duration::days(365), false),
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];
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}
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/// Parses suffixes like 'min', and 'd'; standalone is true if there is no numeric prefix, in which
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/// case plurals (like `days`) are not matched.
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fn duration_suffix(has_prefix: bool) -> impl Fn(&str) -> IResult<&str, Duration> {
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move |input: &str| {
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// Rust wants this to have a default value, but it is not actually used
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// because DURATION_CASES has at least one case with case.2 == `true`
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let mut res = Err(Err::Failure(Error::new(input, ErrorKind::Tag)));
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for case in DURATION_CASES.iter() {
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if !case.2 && !has_prefix {
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// this case requires a prefix, and input does not have one
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continue;
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}
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res = tag(case.0)(input);
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match res {
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Ok((i, _)) => {
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return Ok((i, case.1));
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}
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Err(Err::Error(_)) => {
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// recoverable error
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continue;
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}
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Err(e) => {
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// irrecoverable error
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return Err(e);
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}
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}
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}
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// return the last error
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Err(res.unwrap_err())
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}
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}
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/// Calculate the multiplier for a decimal prefix; this uses integer math
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/// where possible, falling back to floating-point math on seconds
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fn decimal_prefix_multiplier(input: &str) -> IResult<&str, f64> {
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map_res(
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// recognize NN or NN.NN
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alt((recognize(tuple((digit1, char('.'), digit1))), digit1)),
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|input: &str| -> Result<f64, <f64 as FromStr>::Err> {
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let mul = input.parse::<f64>()?;
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Ok(mul)
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},
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)(input)
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}
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/// Parse an iso8601 duration, converting it to a [`chrono::Duration`] on the assumption
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/// that a year is 365 days and a month is 30 days.
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fn iso8601_dur(input: &str) -> IResult<&str, Duration> {
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if let Ok(iso_dur) = IsoDuration::parse(input) {
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// iso8601_duration uses f32, but f32 underflows seconds for values as small as
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// a year. So we upgrade to f64 immediately. f64 has a 53-bit mantissa which can
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// represent almost 300 million years without underflow, so it should be adequate.
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let days = iso_dur.year as f64 * 365.0 + iso_dur.month as f64 * 30.0 + iso_dur.day as f64;
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let hours = days * 24.0 + iso_dur.hour as f64;
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let mins = hours * 60.0 + iso_dur.minute as f64;
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let secs = mins * 60.0 + iso_dur.second as f64;
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let dur = Duration::seconds(secs as i64);
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Ok((&input[input.len()..], dur))
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} else {
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Err(Err::Error(Error::new(input, ErrorKind::Tag)))
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}
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}
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/// Recognizes durations
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pub(crate) fn duration(input: &str) -> IResult<&str, Duration> {
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alt((
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map_res(
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tuple((
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decimal_prefix_multiplier,
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multispace0,
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duration_suffix(true),
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)),
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|input: (f64, &str, Duration)| -> Result<Duration, ()> {
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// `as i64` is saturating, so for large offsets this will
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// just pick an imprecise very-futuristic date
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let secs = (input.0 * input.2.num_seconds() as f64) as i64;
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Ok(Duration::seconds(secs))
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},
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),
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duration_suffix(false),
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iso8601_dur,
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))(input)
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}
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/// Parse a rfc3339 datestamp
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fn rfc3339_timestamp(input: &str) -> IResult<&str, DateTime<Utc>> {
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if let Ok(dt) = DateTime::parse_from_rfc3339(input) {
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// convert to UTC and truncate seconds
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let dt = dt.with_timezone(&Utc).trunc_subsecs(0);
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Ok((&input[input.len()..], dt))
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} else {
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Err(Err::Error(Error::new(input, ErrorKind::Tag)))
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}
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}
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fn named_date<Tz: TimeZone>(
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now: DateTime<Utc>,
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local: Tz,
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) -> impl Fn(&str) -> IResult<&str, DateTime<Utc>> {
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move |input: &str| {
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let local_today = now.with_timezone(&local).date();
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let remaining = &input[input.len()..];
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match input {
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"yesterday" => Ok((remaining, local_today - Duration::days(1))),
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"today" => Ok((remaining, local_today)),
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"tomorrow" => Ok((remaining, local_today + Duration::days(1))),
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// TODO: lots more!
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_ => Err(Err::Error(Error::new(input, ErrorKind::Tag))),
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}
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.map(|(rem, dt)| (rem, dt.and_hms(0, 0, 0).with_timezone(&Utc)))
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}
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}
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/// recognize a digit
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fn digit(input: &str) -> IResult<&str, char> {
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satisfy(|c| is_digit(c as u8))(input)
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}
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/// Parse yyyy-mm-dd as the given date, at the local midnight
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fn yyyy_mm_dd<Tz: TimeZone>(local: Tz) -> impl Fn(&str) -> IResult<&str, DateTime<Utc>> {
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move |input: &str| {
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fn parse_int<T: FromStr>(input: &str) -> Result<T, <T as FromStr>::Err> {
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input.parse::<T>()
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}
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map_res(
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tuple((
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map_res(recognize(count(digit, 4)), parse_int::<i32>),
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char('-'),
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map_res(recognize(many_m_n(1, 2, digit)), parse_int::<u32>),
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char('-'),
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map_res(recognize(many_m_n(1, 2, digit)), parse_int::<u32>),
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)),
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|input: (i32, char, u32, char, u32)| -> Result<DateTime<Utc>, ()> {
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// try to convert, handling out-of-bounds months or days as an error
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let ymd = match local.ymd_opt(input.0, input.2, input.4) {
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chrono::LocalResult::Single(ymd) => Ok(ymd),
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_ => Err(()),
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}?;
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Ok(ymd.and_hms(0, 0, 0).with_timezone(&Utc))
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},
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)(input)
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}
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}
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/// Recognizes timestamps
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pub(crate) fn timestamp<Tz: TimeZone + Copy>(
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now: DateTime<Utc>,
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local: Tz,
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) -> impl Fn(&str) -> IResult<&str, DateTime<Utc>> {
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move |input: &str| {
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alt((
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// relative time
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map_res(
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duration,
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|duration: Duration| -> Result<DateTime<Utc>, ()> { Ok(now + duration) },
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),
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rfc3339_timestamp,
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yyyy_mm_dd(local),
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value(now, tag("now")),
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named_date(now, local),
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))(input)
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}
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}
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#[cfg(test)]
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mod test {
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use super::*;
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use crate::argparse::NOW;
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use rstest::rstest;
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const M: i64 = 60;
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const H: i64 = M * 60;
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const DAY: i64 = H * 24;
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const MONTH: i64 = DAY * 30;
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const YEAR: i64 = DAY * 365;
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// TODO: use const when chrono supports it
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lazy_static! {
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// India standard time (not an even multiple of hours)
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static ref IST: FixedOffset = FixedOffset::east(5 * 3600 + 30 * 60);
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// Utc, but as a FixedOffset TimeZone impl
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static ref UTC_FO: FixedOffset = FixedOffset::east(0);
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// Hawaii
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static ref HST: FixedOffset = FixedOffset::west(10 * 3600);
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}
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/// test helper to ensure that the entire input is consumed
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fn complete_duration(input: &str) -> IResult<&str, Duration> {
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all_consuming(duration)(input)
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}
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/// test helper to ensure that the entire input is consumed
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fn complete_timestamp<Tz: TimeZone + Copy>(
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now: DateTime<Utc>,
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local: Tz,
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) -> impl Fn(&str) -> IResult<&str, DateTime<Utc>> {
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move |input: &str| all_consuming(timestamp(now, local))(input)
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}
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/// Shorthand day and time
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fn dt(y: i32, m: u32, d: u32, hh: u32, mm: u32, ss: u32) -> DateTime<Utc> {
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Utc.ymd(y, m, d).and_hms(hh, mm, ss)
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}
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/// Local day and time, parameterized on the timezone
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fn ldt(
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y: i32,
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m: u32,
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d: u32,
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hh: u32,
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mm: u32,
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ss: u32,
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) -> Box<dyn Fn(FixedOffset) -> DateTime<Utc>> {
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Box::new(move |tz| tz.ymd(y, m, d).and_hms(hh, mm, ss).with_timezone(&Utc))
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}
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fn ld(y: i32, m: u32, d: u32) -> Box<dyn Fn(FixedOffset) -> DateTime<Utc>> {
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ldt(y, m, d, 0, 0, 0)
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}
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#[rstest]
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#[case::rel_hours_0(dt(2021, 5, 29, 1, 30, 0), "0h", dt(2021, 5, 29, 1, 30, 0))]
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#[case::rel_hours_05(dt(2021, 5, 29, 1, 30, 0), "0.5h", dt(2021, 5, 29, 2, 0, 0))]
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#[case::rel_hours_no_prefix(dt(2021, 5, 29, 1, 30, 0), "hour", dt(2021, 5, 29, 2, 30, 0))]
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#[case::rel_hours_5(dt(2021, 5, 29, 1, 30, 0), "5h", dt(2021, 5, 29, 6, 30, 0))]
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#[case::rel_days_0(dt(2021, 5, 29, 1, 30, 0), "0d", dt(2021, 5, 29, 1, 30, 0))]
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#[case::rel_days_10(dt(2021, 5, 29, 1, 30, 0), "10d", dt(2021, 6, 8, 1, 30, 0))]
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#[case::rfc3339_datetime(*NOW, "2019-10-12T07:20:50.12Z", dt(2019, 10, 12, 7, 20, 50))]
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#[case::now(*NOW, "now", *NOW)]
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/// Cases where the `local` parameter is ignored
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fn test_nonlocal_timestamp(
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#[case] now: DateTime<Utc>,
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#[case] input: &'static str,
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#[case] output: DateTime<Utc>,
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) {
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let (_, res) = complete_timestamp(now, *IST)(input).unwrap();
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assert_eq!(res, output, "parsing {:?}", input);
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}
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#[rstest]
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/// Cases where the `local` parameter matters
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#[case::yyyy_mm_dd(ld(2000, 1, 1), "2021-01-01", ld(2021, 1, 1))]
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#[case::yyyy_m_d(ld(2000, 1, 1), "2021-1-1", ld(2021, 1, 1))]
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#[case::yesterday(ld(2021, 3, 1), "yesterday", ld(2021, 2, 28))]
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#[case::yesterday_from_evening(ldt(2021, 3, 1, 21, 30, 30), "yesterday", ld(2021, 2, 28))]
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#[case::today(ld(2021, 3, 1), "today", ld(2021, 3, 1))]
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#[case::today_from_evening(ldt(2021, 3, 1, 21, 30, 30), "today", ld(2021, 3, 1))]
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#[case::tomorrow(ld(2021, 3, 1), "tomorrow", ld(2021, 3, 2))]
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#[case::tomorow_from_evening(ldt(2021, 3, 1, 21, 30, 30), "tomorrow", ld(2021, 3, 2))]
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fn test_local_timestamp(
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#[case] now: Box<dyn Fn(FixedOffset) -> DateTime<Utc>>,
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#[values(*IST, *UTC_FO, *HST)] tz: FixedOffset,
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#[case] input: &str,
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#[case] output: Box<dyn Fn(FixedOffset) -> DateTime<Utc>>,
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) {
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let now = now(tz);
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let output = output(tz);
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let (_, res) = complete_timestamp(now, tz)(input).unwrap();
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assert_eq!(
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res, output,
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"parsing {:?} relative to {:?} in timezone {:?}",
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input, now, tz
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);
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}
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#[rstest]
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#[case::rfc3339_datetime_bad_month(*NOW, "2019-10-99T07:20:50.12Z")]
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#[case::yyyy_mm_dd_bad_month(*NOW, "2019-10-99")]
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fn test_timestamp_err(#[case] now: DateTime<Utc>, #[case] input: &'static str) {
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let res = complete_timestamp(now, Utc)(input);
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assert!(
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res.is_err(),
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"expected error parsing {:?}, got {:?}",
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input,
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res.unwrap()
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);
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}
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// All test cases from
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// https://github.com/GothenburgBitFactory/libshared/blob/9a5f24e2acb38d05afb8f8e316a966dee196a42a/test/duration.t.cpp#L136
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#[rstest]
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#[case("0seconds", 0)]
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#[case("2 seconds", 2)]
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#[case("10seconds", 10)]
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#[case("1.5seconds", 1)]
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#[case("0second", 0)]
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#[case("2 second", 2)]
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#[case("10second", 10)]
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#[case("1.5second", 1)]
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#[case("0s", 0)]
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#[case("2 s", 2)]
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#[case("10s", 10)]
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#[case("1.5s", 1)]
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#[case("0minutes", 0)]
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#[case("2 minutes", 2 * M)]
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#[case("10minutes", 10 * M)]
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#[case("1.5minutes", M + 30)]
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#[case("0minute", 0)]
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#[case("2 minute", 2 * M)]
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#[case("10minute", 10 * M)]
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#[case("1.5minute", M + 30)]
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#[case("0min", 0)]
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#[case("2 min", 2 * M)]
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#[case("10min", 10 * M)]
|
||||
#[case("1.5min", M + 30)]
|
||||
#[case("0hours", 0)]
|
||||
#[case("2 hours", 2 * H)]
|
||||
#[case("10hours", 10 * H)]
|
||||
#[case("1.5hours", H + 30 * M)]
|
||||
#[case("0hour", 0)]
|
||||
#[case("2 hour", 2 * H)]
|
||||
#[case("10hour", 10 * H)]
|
||||
#[case("1.5hour", H + 30 * M)]
|
||||
#[case("0h", 0)]
|
||||
#[case("2 h", 2 * H)]
|
||||
#[case("10h", 10 * H)]
|
||||
#[case("1.5h", H + 30 * M)]
|
||||
#[case("weekdays", DAY)]
|
||||
#[case("daily", DAY)]
|
||||
#[case("0days", 0)]
|
||||
#[case("2 days", 2 * DAY)]
|
||||
#[case("10days", 10 * DAY)]
|
||||
#[case("1.5days", DAY + 12 * H)]
|
||||
#[case("0day", 0)]
|
||||
#[case("2 day", 2 * DAY)]
|
||||
#[case("10day", 10 * DAY)]
|
||||
#[case("1.5day", DAY + 12 * H)]
|
||||
#[case("0d", 0)]
|
||||
#[case("2 d", 2 * DAY)]
|
||||
#[case("10d", 10 * DAY)]
|
||||
#[case("1.5d", DAY + 12 * H)]
|
||||
#[case("weekly", 7 * DAY)]
|
||||
#[case("0weeks", 0)]
|
||||
#[case("2 weeks", 14 * DAY)]
|
||||
#[case("10weeks", 70 * DAY)]
|
||||
#[case("1.5weeks", 10 * DAY + 12 * H)]
|
||||
#[case("0week", 0)]
|
||||
#[case("2 week", 14 * DAY)]
|
||||
#[case("10week", 70 * DAY)]
|
||||
#[case("1.5week", 10 * DAY + 12 * H)]
|
||||
#[case("0w", 0)]
|
||||
#[case("2 w", 14 * DAY)]
|
||||
#[case("10w", 70 * DAY)]
|
||||
#[case("1.5w", 10 * DAY + 12 * H)]
|
||||
#[case("monthly", 30 * DAY)]
|
||||
#[case("0months", 0)]
|
||||
#[case("2 months", 60 * DAY)]
|
||||
#[case("10months", 300 * DAY)]
|
||||
#[case("1.5months", 45 * DAY)]
|
||||
#[case("0month", 0)]
|
||||
#[case("2 month", 60 * DAY)]
|
||||
#[case("10month", 300 * DAY)]
|
||||
#[case("1.5month", 45 * DAY)]
|
||||
#[case("0mo", 0)]
|
||||
#[case("2 mo", 60 * DAY)]
|
||||
#[case("10mo", 300 * DAY)]
|
||||
#[case("1.5mo", 45 * DAY)]
|
||||
#[case("quarterly", 91 * DAY)]
|
||||
#[case("0quarters", 0)]
|
||||
#[case("2 quarters", 182 * DAY)]
|
||||
#[case("10quarters", 910 * DAY)]
|
||||
#[case("1.5quarters", 136 * DAY + 12 * H)]
|
||||
#[case("0quarter", 0)]
|
||||
#[case("2 quarter", 182 * DAY)]
|
||||
#[case("10quarter", 910 * DAY)]
|
||||
#[case("1.5quarter", 136 * DAY + 12 * H)]
|
||||
#[case("0q", 0)]
|
||||
#[case("2 q", 182 * DAY)]
|
||||
#[case("10q", 910 * DAY)]
|
||||
#[case("1.5q", 136 * DAY + 12 * H)]
|
||||
#[case("yearly", YEAR)]
|
||||
#[case("0years", 0)]
|
||||
#[case("2 years", 2 * YEAR)]
|
||||
#[case("10years", 10 * YEAR)]
|
||||
#[case("1.5years", 547 * DAY + 12 * H)]
|
||||
#[case("0year", 0)]
|
||||
#[case("2 year", 2 * YEAR)]
|
||||
#[case("10year", 10 * YEAR)]
|
||||
#[case("1.5year", 547 * DAY + 12 * H)]
|
||||
#[case("0y", 0)]
|
||||
#[case("2 y", 2 * YEAR)]
|
||||
#[case("10y", 10 * YEAR)]
|
||||
#[case("1.5y", 547 * DAY + 12 * H)]
|
||||
#[case("annual", YEAR)]
|
||||
#[case("biannual", 2 * YEAR)]
|
||||
#[case("bimonthly", 61 * DAY)]
|
||||
#[case("biweekly", 14 * DAY)]
|
||||
#[case("biyearly", 2 * YEAR)]
|
||||
#[case("fortnight", 14 * DAY)]
|
||||
#[case("semiannual", 183 * DAY)]
|
||||
#[case("0sennight", 0)]
|
||||
#[case("2 sennight", 28 * DAY)]
|
||||
#[case("10sennight", 140 * DAY)]
|
||||
#[case("1.5sennight", 21 * DAY)]
|
||||
fn test_duration_units(#[case] input: &'static str, #[case] seconds: i64) {
|
||||
let (_, res) = complete_duration(input).expect(input);
|
||||
assert_eq!(res.num_seconds(), seconds, "parsing {}", input);
|
||||
}
|
||||
|
||||
#[rstest]
|
||||
#[case("years")]
|
||||
#[case("minutes")]
|
||||
#[case("eons")]
|
||||
#[case("P1S")] // missing T
|
||||
#[case("p1y")] // lower-case
|
||||
fn test_duration_errors(#[case] input: &'static str) {
|
||||
let res = complete_duration(input);
|
||||
assert!(
|
||||
res.is_err(),
|
||||
"did not get expected error parsing duration {:?}; got {:?}",
|
||||
input,
|
||||
res.unwrap()
|
||||
);
|
||||
}
|
||||
|
||||
// https://github.com/GothenburgBitFactory/libshared/blob/9a5f24e2acb38d05afb8f8e316a966dee196a42a/test/duration.t.cpp#L115
|
||||
#[rstest]
|
||||
#[case("P1Y", YEAR)]
|
||||
#[case("P1M", MONTH)]
|
||||
#[case("P1D", DAY)]
|
||||
#[case("P1Y1M", YEAR + MONTH)]
|
||||
#[case("P1Y1D", YEAR + DAY)]
|
||||
#[case("P1M1D", MONTH + DAY)]
|
||||
#[case("P1Y1M1D", YEAR + MONTH + DAY)]
|
||||
#[case("PT1H", H)]
|
||||
#[case("PT1M", M)]
|
||||
#[case("PT1S", 1)]
|
||||
#[case("PT1H1M", H + M)]
|
||||
#[case("PT1H1S", H + 1)]
|
||||
#[case("PT1M1S", M + 1)]
|
||||
#[case("PT1H1M1S", H + M + 1)]
|
||||
#[case("P1Y1M1DT1H1M1S", YEAR + MONTH + DAY + H + M + 1)]
|
||||
#[case("PT24H", DAY)]
|
||||
#[case("PT40000000S", 40000000)]
|
||||
#[case("PT3600S", H)]
|
||||
#[case("PT60M", H)]
|
||||
fn test_duration_8601(#[case] input: &'static str, #[case] seconds: i64) {
|
||||
let (_, res) = complete_duration(input).expect(input);
|
||||
assert_eq!(res.num_seconds(), seconds, "parsing {}", input);
|
||||
}
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue