327 lines
9.1 KiB
Rust
327 lines
9.1 KiB
Rust
use std::collections::HashMap;
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use anyhow::{Error};
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use lazy_static::lazy_static;
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use super::time::*;
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use crate::tools::nom::{
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parse_complete_line, parse_u64, parse_error, IResult,
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};
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use nom::{
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error::{context},
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bytes::complete::{tag, take_while1},
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combinator::{map_res, opt, recognize},
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sequence::{pair, preceded, tuple},
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character::complete::{alpha1, space0, digit1},
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multi::separated_nonempty_list,
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};
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lazy_static! {
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pub static ref TIME_SPAN_UNITS: HashMap<&'static str, f64> = {
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let mut map = HashMap::new();
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let second = 1.0;
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map.insert("seconds", second);
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map.insert("second", second);
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map.insert("sec", second);
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map.insert("s", second);
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let msec = second / 1000.0;
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map.insert("msec", msec);
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map.insert("ms", msec);
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let usec = msec / 1000.0;
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map.insert("usec", usec);
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map.insert("us", usec);
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map.insert("µs", usec);
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let nsec = usec / 1000.0;
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map.insert("nsec", nsec);
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map.insert("ns", nsec);
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let minute = second * 60.0;
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map.insert("minutes", minute);
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map.insert("minute", minute);
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map.insert("min", minute);
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map.insert("m", minute);
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let hour = minute * 60.0;
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map.insert("hours", hour);
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map.insert("hour", hour);
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map.insert("hr", hour);
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map.insert("h", hour);
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let day = hour * 24.0 ;
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map.insert("days", day);
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map.insert("day", day);
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map.insert("d", day);
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let week = day * 7.0;
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map.insert("weeks", week);
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map.insert("week", week);
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map.insert("w", week);
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let month = 30.44 * day;
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map.insert("months", month);
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map.insert("month", month);
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map.insert("M", month);
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let year = 365.25 * day;
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map.insert("years", year);
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map.insert("year", year);
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map.insert("y", year);
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map
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};
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}
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fn parse_time_comp(max: usize) -> impl Fn(&str) -> IResult<&str, u32> {
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move |i: &str| {
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let (i, v) = map_res(recognize(digit1), str::parse)(i)?;
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if (v as usize) >= max {
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return Err(parse_error(i, "time value too large"));
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}
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Ok((i, v))
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}
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}
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fn parse_weekday(i: &str) -> IResult<&str, WeekDays> {
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let (i, text) = alpha1(i)?;
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match text.to_ascii_lowercase().as_str() {
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"monday" | "mon" => Ok((i, WeekDays::MONDAY)),
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"tuesday" | "tue" => Ok((i, WeekDays::TUESDAY)),
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"wednesday" | "wed" => Ok((i, WeekDays::WEDNESDAY)),
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"thursday" | "thu" => Ok((i, WeekDays::THURSDAY)),
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"friday" | "fri" => Ok((i, WeekDays::FRIDAY)),
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"saturday" | "sat" => Ok((i, WeekDays::SATURDAY)),
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"sunday" | "sun" => Ok((i, WeekDays::SUNDAY)),
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_ => return Err(parse_error(text, "weekday")),
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}
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}
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fn parse_weekdays_range(i: &str) -> IResult<&str, WeekDays> {
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let (i, startday) = parse_weekday(i)?;
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let generate_range = |start, end| {
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let mut res = 0;
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let mut pos = start;
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loop {
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res |= pos;
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if pos >= end { break; }
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pos = pos << 1;
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}
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WeekDays::from_bits(res).unwrap()
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};
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if let (i, Some((_, endday))) = opt(pair(tag(".."),parse_weekday))(i)? {
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let start = startday.bits();
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let end = endday.bits();
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if start > end {
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let set1 = generate_range(start, WeekDays::SUNDAY.bits());
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let set2 = generate_range(WeekDays::MONDAY.bits(), end);
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Ok((i, set1 | set2))
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} else {
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Ok((i, generate_range(start, end)))
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}
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} else {
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Ok((i, startday))
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}
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}
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fn parse_date_time_comp(max: usize) -> impl Fn(&str) -> IResult<&str, DateTimeValue> {
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move |i: &str| {
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let (i, value) = parse_time_comp(max)(i)?;
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if let (i, Some(end)) = opt(preceded(tag(".."), parse_time_comp(max)))(i)? {
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return Ok((i, DateTimeValue::Range(value, end)))
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}
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if i.starts_with("/") {
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let i = &i[1..];
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let (i, repeat) = parse_time_comp(max)(i)?;
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Ok((i, DateTimeValue::Repeated(value, repeat)))
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} else {
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Ok((i, DateTimeValue::Single(value)))
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}
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}
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}
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fn parse_date_time_comp_list(max: usize) -> impl Fn(&str) -> IResult<&str, Vec<DateTimeValue>> {
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move |i: &str| {
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if i.starts_with("*") {
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return Ok((&i[1..], Vec::new()));
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}
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separated_nonempty_list(tag(","), parse_date_time_comp(max))(i)
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}
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}
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fn parse_time_spec(i: &str) -> IResult<&str, (Vec<DateTimeValue>, Vec<DateTimeValue>, Vec<DateTimeValue>)> {
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let (i, (hour, minute, opt_second)) = tuple((
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parse_date_time_comp_list(24),
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preceded(tag(":"), parse_date_time_comp_list(60)),
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opt(preceded(tag(":"), parse_date_time_comp_list(60))),
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))(i)?;
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if let Some(second) = opt_second {
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Ok((i, (hour, minute, second)))
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} else {
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Ok((i, (hour, minute, vec![DateTimeValue::Single(0)])))
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}
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}
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pub fn parse_calendar_event(i: &str) -> Result<CalendarEvent, Error> {
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parse_complete_line("calendar event", i, parse_calendar_event_incomplete)
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}
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fn parse_calendar_event_incomplete(mut i: &str) -> IResult<&str, CalendarEvent> {
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let mut has_dayspec = false;
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let mut has_timespec = false;
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let has_datespec = false;
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let mut event = CalendarEvent::default();
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if i.starts_with(|c: char| char::is_ascii_alphabetic(&c)) {
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match i {
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"minutely" => {
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return Ok(("", CalendarEvent {
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second: vec![DateTimeValue::Single(0)],
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..Default::default()
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}));
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}
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"hourly" => {
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return Ok(("", CalendarEvent {
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minute: vec![DateTimeValue::Single(0)],
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second: vec![DateTimeValue::Single(0)],
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..Default::default()
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}));
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}
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"daily" => {
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return Ok(("", CalendarEvent {
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hour: vec![DateTimeValue::Single(0)],
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minute: vec![DateTimeValue::Single(0)],
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second: vec![DateTimeValue::Single(0)],
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..Default::default()
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}));
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}
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"monthly" | "weekly" | "yearly" | "quarterly" | "semiannually" => {
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return Err(parse_error(i, "unimplemented date or time specification"));
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}
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_ => { /* continue */ }
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}
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let (n, range_list) = context(
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"weekday range list",
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separated_nonempty_list(tag(","), parse_weekdays_range)
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)(i)?;
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has_dayspec = true;
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i = space0(n)?.0;
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for range in range_list { event.days.insert(range); }
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}
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// todo: support date specs
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if let (n, Some((hour, minute, second))) = opt(parse_time_spec)(i)? {
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event.hour = hour;
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event.minute = minute;
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event.second = second;
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has_timespec = true;
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i = n;
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} else {
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event.hour = vec![DateTimeValue::Single(0)];
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event.minute = vec![DateTimeValue::Single(0)];
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event.second = vec![DateTimeValue::Single(0)];
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}
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if !(has_dayspec || has_timespec || has_datespec) {
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return Err(parse_error(i, "date or time specification"));
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}
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Ok((i, event))
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}
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fn parse_time_unit(i: &str) -> IResult<&str, &str> {
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let (n, text) = take_while1(|c: char| char::is_ascii_alphabetic(&c) || c == 'µ')(i)?;
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if TIME_SPAN_UNITS.contains_key(&text) {
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Ok((n, text))
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} else {
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Err(parse_error(text, "time unit"))
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}
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}
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pub fn parse_time_span(i: &str) -> Result<TimeSpan, Error> {
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parse_complete_line("time span", i, parse_time_span_incomplete)
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}
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fn parse_time_span_incomplete(mut i: &str) -> IResult<&str, TimeSpan> {
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let mut ts = TimeSpan::default();
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loop {
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i = space0(i)?.0;
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if i.is_empty() { break; }
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let (n, num) = parse_u64(i)?;
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i = space0(n)?.0;
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if let (n, Some(unit)) = opt(parse_time_unit)(i)? {
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i = n;
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match unit {
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"seconds" | "second" | "sec" | "s" => {
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ts.seconds += num;
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}
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"msec" | "ms" => {
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ts.msec += num;
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}
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"usec" | "us" | "µs" => {
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ts.usec += num;
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}
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"nsec" | "ns" => {
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ts.nsec += num;
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}
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"minutes" | "minute" | "min" | "m" => {
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ts.minutes += num;
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}
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"hours" | "hour" | "hr" | "h" => {
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ts.hours += num;
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}
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"days" | "day" | "d" => {
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ts.days += num;
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}
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"weeks" | "week" | "w" => {
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ts.weeks += num;
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}
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"months" | "month" | "M" => {
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ts.months += num;
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}
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"years" | "year" | "y" => {
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ts.years += num;
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}
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_ => return Err(parse_error(unit, "internal error")),
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}
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} else {
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ts.seconds += num;
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}
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}
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Ok((i, ts))
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}
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