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516 lines
17 KiB
Rust
516 lines
17 KiB
Rust
3 years ago
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use chrono::{Datelike, Duration, NaiveDate, NaiveDateTime, NaiveTime, Timelike};
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use once_cell::sync::Lazy;
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use regex::Regex;
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use ropey::RopeSlice;
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use std::borrow::Cow;
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use std::cmp;
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use super::Increment;
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use crate::{Range, Tendril};
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#[derive(Debug, PartialEq, Eq)]
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pub struct DateTimeIncrementor {
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date_time: NaiveDateTime,
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range: Range,
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format: Format,
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field: DateField,
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}
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impl DateTimeIncrementor {
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pub fn from_range(text: RopeSlice, range: Range) -> Option<DateTimeIncrementor> {
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let range = if range.is_empty() {
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if range.anchor < text.len_chars() {
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// Treat empty range as a cursor range.
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range.put_cursor(text, range.anchor + 1, true)
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} else {
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// The range is empty and at the end of the text.
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return None;
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}
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} else {
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range
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};
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FORMATS.iter().find_map(|format| {
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let from = range.from().saturating_sub(format.max_len);
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let to = (range.from() + format.max_len).min(text.len_chars());
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let (from_in_text, to_in_text) = (range.from() - from, range.to() - from);
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let text: Cow<str> = text.slice(from..to).into();
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let captures = format.regex.captures(&text)?;
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if captures.len() - 1 != format.fields.len() {
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return None;
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}
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let date_time = captures.get(0)?;
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let offset = range.from() - from_in_text;
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let range = Range::new(date_time.start() + offset, date_time.end() + offset);
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let field = captures
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.iter()
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.skip(1)
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.enumerate()
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.find_map(|(i, capture)| {
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let capture = capture?;
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let capture_range = capture.range();
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if capture_range.contains(&from_in_text)
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&& capture_range.contains(&(to_in_text - 1))
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{
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Some(format.fields[i])
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} else {
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None
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}
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})?;
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let has_date = format.fields.iter().any(|f| f.unit.is_date());
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let has_time = format.fields.iter().any(|f| f.unit.is_time());
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let date_time = match (has_date, has_time) {
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(true, true) => NaiveDateTime::parse_from_str(
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&text[date_time.start()..date_time.end()],
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format.fmt,
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)
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.ok()?,
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(true, false) => {
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let date = NaiveDate::parse_from_str(
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&text[date_time.start()..date_time.end()],
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format.fmt,
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)
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.ok()?;
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date.and_hms(0, 0, 0)
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}
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(false, true) => {
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let time = NaiveTime::parse_from_str(
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&text[date_time.start()..date_time.end()],
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format.fmt,
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)
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.ok()?;
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NaiveDate::from_ymd(0, 1, 1).and_time(time)
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}
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(false, false) => return None,
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};
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Some(DateTimeIncrementor {
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date_time,
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range,
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format: format.clone(),
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field,
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})
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})
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}
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}
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impl Increment for DateTimeIncrementor {
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fn increment(&self, amount: i64) -> (Range, Tendril) {
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let date_time = match self.field.unit {
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DateUnit::Years => add_years(self.date_time, amount),
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DateUnit::Months => add_months(self.date_time, amount),
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DateUnit::Days => add_duration(self.date_time, Duration::days(amount)),
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DateUnit::Hours => add_duration(self.date_time, Duration::hours(amount)),
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DateUnit::Minutes => add_duration(self.date_time, Duration::minutes(amount)),
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DateUnit::Seconds => add_duration(self.date_time, Duration::seconds(amount)),
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DateUnit::AmPm => toggle_am_pm(self.date_time),
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}
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.unwrap_or(self.date_time);
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(
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self.range,
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date_time.format(self.format.fmt).to_string().into(),
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)
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}
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}
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static FORMATS: Lazy<Vec<Format>> = Lazy::new(|| {
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vec![
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Format::new("%Y-%m-%d %H:%M:%S"), // 2021-11-24 07:12:23
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Format::new("%Y/%m/%d %H:%M:%S"), // 2021/11/24 07:12:23
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Format::new("%Y-%m-%d %H:%M"), // 2021-11-24 07:12
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Format::new("%Y/%m/%d %H:%M"), // 2021/11/24 07:12
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Format::new("%Y-%m-%d"), // 2021-11-24
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Format::new("%Y/%m/%d"), // 2021/11/24
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Format::new("%a %b %d %Y"), // Wed Nov 24 2021
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Format::new("%d-%b-%Y"), // 24-Nov-2021
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Format::new("%Y %b %d"), // 2021 Nov 24
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Format::new("%b %d, %Y"), // Nov 24, 2021
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Format::new("%-I:%M:%S %P"), // 7:21:53 am
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Format::new("%-I:%M %P"), // 7:21 am
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Format::new("%-I:%M:%S %p"), // 7:21:53 AM
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Format::new("%-I:%M %p"), // 7:21 AM
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Format::new("%H:%M:%S"), // 23:24:23
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Format::new("%H:%M"), // 23:24
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]
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});
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#[derive(Clone, Debug)]
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struct Format {
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fmt: &'static str,
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fields: Vec<DateField>,
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regex: Regex,
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max_len: usize,
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}
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impl Format {
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fn new(fmt: &'static str) -> Self {
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let mut remaining = fmt;
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let mut fields = Vec::new();
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let mut regex = String::new();
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let mut max_len = 0;
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while let Some(i) = remaining.find('%') {
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let mut chars = remaining[i + 1..].chars();
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let spec_len = if let Some(c) = chars.next() {
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if c == '-' {
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if chars.next().is_some() {
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2
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} else {
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0
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}
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} else {
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1
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}
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} else {
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0
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};
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if i < remaining.len() - spec_len {
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let specifier = &remaining[i + 1..i + 1 + spec_len];
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if let Some(field) = DateField::from_specifier(specifier) {
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fields.push(field);
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max_len += field.max_len + remaining[..i].len();
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regex += &remaining[..i];
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regex += &format!("({})", field.regex);
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remaining = &remaining[i + spec_len + 1..];
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} else {
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regex += &remaining[..=i];
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}
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} else {
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regex += remaining;
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}
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}
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let regex = Regex::new(®ex).unwrap();
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Self {
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fmt,
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fields,
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regex,
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max_len,
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}
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}
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}
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impl PartialEq for Format {
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fn eq(&self, other: &Self) -> bool {
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self.fmt == other.fmt && self.fields == other.fields && self.max_len == other.max_len
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}
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}
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impl Eq for Format {}
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#[derive(Copy, Clone, Debug, PartialEq, Eq)]
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struct DateField {
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regex: &'static str,
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unit: DateUnit,
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max_len: usize,
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}
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impl DateField {
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fn from_specifier(specifier: &str) -> Option<Self> {
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match specifier {
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"Y" => Some(DateField {
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regex: r"\d{4}",
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unit: DateUnit::Years,
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max_len: 5,
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}),
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"y" => Some(DateField {
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regex: r"\d\d",
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unit: DateUnit::Years,
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max_len: 2,
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}),
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"m" => Some(DateField {
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regex: r"[0-1]\d",
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unit: DateUnit::Months,
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max_len: 2,
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}),
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"d" => Some(DateField {
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regex: r"[0-3]\d",
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unit: DateUnit::Days,
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max_len: 2,
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}),
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"-d" => Some(DateField {
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regex: r"[1-3]?\d",
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unit: DateUnit::Days,
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max_len: 2,
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}),
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"a" => Some(DateField {
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regex: r"Sun|Mon|Tue|Wed|Thu|Fri|Sat",
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unit: DateUnit::Days,
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max_len: 3,
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}),
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"A" => Some(DateField {
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regex: r"Sunday|Monday|Tuesday|Wednesday|Thursday|Friday|Saturday",
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unit: DateUnit::Days,
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max_len: 9,
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}),
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"b" | "h" => Some(DateField {
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regex: r"Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec",
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unit: DateUnit::Months,
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max_len: 3,
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}),
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"B" => Some(DateField {
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regex: r"January|February|March|April|May|June|July|August|September|October|November|December",
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unit: DateUnit::Months,
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max_len: 9,
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}),
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"H" => Some(DateField {
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regex: r"[0-2]\d",
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unit: DateUnit::Hours,
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max_len: 2,
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}),
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"M" => Some(DateField {
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regex: r"[0-5]\d",
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unit: DateUnit::Minutes,
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max_len: 2,
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}),
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"S" => Some(DateField {
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regex: r"[0-5]\d",
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unit: DateUnit::Seconds,
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max_len: 2,
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}),
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"I" => Some(DateField {
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regex: r"[0-1]\d",
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unit: DateUnit::Hours,
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max_len: 2,
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}),
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"-I" => Some(DateField {
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regex: r"1?\d",
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unit: DateUnit::Hours,
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max_len: 2,
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}),
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"P" => Some(DateField {
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regex: r"am|pm",
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unit: DateUnit::AmPm,
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max_len: 2,
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}),
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"p" => Some(DateField {
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regex: r"AM|PM",
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unit: DateUnit::AmPm,
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max_len: 2,
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}),
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_ => None,
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}
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}
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}
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#[derive(Copy, Clone, Debug, PartialEq, Eq)]
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enum DateUnit {
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Years,
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Months,
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Days,
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Hours,
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Minutes,
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Seconds,
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AmPm,
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}
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impl DateUnit {
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fn is_date(self) -> bool {
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matches!(self, DateUnit::Years | DateUnit::Months | DateUnit::Days)
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}
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fn is_time(self) -> bool {
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matches!(
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self,
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DateUnit::Hours | DateUnit::Minutes | DateUnit::Seconds
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)
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}
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}
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fn ndays_in_month(year: i32, month: u32) -> u32 {
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// The first day of the next month...
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let (y, m) = if month == 12 {
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(year + 1, 1)
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} else {
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(year, month + 1)
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};
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let d = NaiveDate::from_ymd(y, m, 1);
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// ...is preceded by the last day of the original month.
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d.pred().day()
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}
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fn add_months(date_time: NaiveDateTime, amount: i64) -> Option<NaiveDateTime> {
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let month = date_time.month0() as i64 + amount;
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let year = date_time.year() + i32::try_from(month / 12).ok()?;
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let year = if month.is_negative() { year - 1 } else { year };
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// Normalize month
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let month = month % 12;
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let month = if month.is_negative() {
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month + 13
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} else {
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month + 1
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} as u32;
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let day = cmp::min(date_time.day(), ndays_in_month(year, month));
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Some(NaiveDate::from_ymd(year, month, day).and_time(date_time.time()))
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}
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fn add_years(date_time: NaiveDateTime, amount: i64) -> Option<NaiveDateTime> {
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let year = i32::try_from(date_time.year() as i64 + amount).ok()?;
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let ndays = ndays_in_month(year, date_time.month());
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if date_time.day() > ndays {
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let d = NaiveDate::from_ymd(year, date_time.month(), ndays);
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Some(d.succ().and_time(date_time.time()))
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} else {
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date_time.with_year(year)
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}
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}
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fn add_duration(date_time: NaiveDateTime, duration: Duration) -> Option<NaiveDateTime> {
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date_time.checked_add_signed(duration)
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||
|
|
}
|
||
|
|
|
||
|
|
fn toggle_am_pm(date_time: NaiveDateTime) -> Option<NaiveDateTime> {
|
||
|
|
if date_time.hour() < 12 {
|
||
|
|
add_duration(date_time, Duration::hours(12))
|
||
|
|
} else {
|
||
|
|
add_duration(date_time, Duration::hours(-12))
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[cfg(test)]
|
||
|
|
mod test {
|
||
|
|
use super::*;
|
||
|
|
use crate::Rope;
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_increment_date_times() {
|
||
|
|
let tests = [
|
||
|
|
// (original, cursor, amount, expected)
|
||
|
|
("2020-02-28", 0, 1, "2021-02-28"),
|
||
|
|
("2020-02-29", 0, 1, "2021-03-01"),
|
||
|
|
("2020-01-31", 5, 1, "2020-02-29"),
|
||
|
|
("2020-01-20", 5, 1, "2020-02-20"),
|
||
|
|
("2021-01-01", 5, -1, "2020-12-01"),
|
||
|
|
("2021-01-31", 5, -2, "2020-11-30"),
|
||
|
|
("2020-02-28", 8, 1, "2020-02-29"),
|
||
|
|
("2021-02-28", 8, 1, "2021-03-01"),
|
||
|
|
("2021-02-28", 0, -1, "2020-02-28"),
|
||
|
|
("2021-03-01", 0, -1, "2020-03-01"),
|
||
|
|
("2020-02-29", 5, -1, "2020-01-29"),
|
||
|
|
("2020-02-20", 5, -1, "2020-01-20"),
|
||
|
|
("2020-02-29", 8, -1, "2020-02-28"),
|
||
|
|
("2021-03-01", 8, -1, "2021-02-28"),
|
||
|
|
("1980/12/21", 8, 100, "1981/03/31"),
|
||
|
|
("1980/12/21", 8, -100, "1980/09/12"),
|
||
|
|
("1980/12/21", 8, 1000, "1983/09/17"),
|
||
|
|
("1980/12/21", 8, -1000, "1978/03/27"),
|
||
|
|
("2021-11-24 07:12:23", 0, 1, "2022-11-24 07:12:23"),
|
||
|
|
("2021-11-24 07:12:23", 5, 1, "2021-12-24 07:12:23"),
|
||
|
|
("2021-11-24 07:12:23", 8, 1, "2021-11-25 07:12:23"),
|
||
|
|
("2021-11-24 07:12:23", 11, 1, "2021-11-24 08:12:23"),
|
||
|
|
("2021-11-24 07:12:23", 14, 1, "2021-11-24 07:13:23"),
|
||
|
|
("2021-11-24 07:12:23", 17, 1, "2021-11-24 07:12:24"),
|
||
|
|
("2021/11/24 07:12:23", 0, 1, "2022/11/24 07:12:23"),
|
||
|
|
("2021/11/24 07:12:23", 5, 1, "2021/12/24 07:12:23"),
|
||
|
|
("2021/11/24 07:12:23", 8, 1, "2021/11/25 07:12:23"),
|
||
|
|
("2021/11/24 07:12:23", 11, 1, "2021/11/24 08:12:23"),
|
||
|
|
("2021/11/24 07:12:23", 14, 1, "2021/11/24 07:13:23"),
|
||
|
|
("2021/11/24 07:12:23", 17, 1, "2021/11/24 07:12:24"),
|
||
|
|
("2021-11-24 07:12", 0, 1, "2022-11-24 07:12"),
|
||
|
|
("2021-11-24 07:12", 5, 1, "2021-12-24 07:12"),
|
||
|
|
("2021-11-24 07:12", 8, 1, "2021-11-25 07:12"),
|
||
|
|
("2021-11-24 07:12", 11, 1, "2021-11-24 08:12"),
|
||
|
|
("2021-11-24 07:12", 14, 1, "2021-11-24 07:13"),
|
||
|
|
("2021/11/24 07:12", 0, 1, "2022/11/24 07:12"),
|
||
|
|
("2021/11/24 07:12", 5, 1, "2021/12/24 07:12"),
|
||
|
|
("2021/11/24 07:12", 8, 1, "2021/11/25 07:12"),
|
||
|
|
("2021/11/24 07:12", 11, 1, "2021/11/24 08:12"),
|
||
|
|
("2021/11/24 07:12", 14, 1, "2021/11/24 07:13"),
|
||
|
|
("Wed Nov 24 2021", 0, 1, "Thu Nov 25 2021"),
|
||
|
|
("Wed Nov 24 2021", 4, 1, "Fri Dec 24 2021"),
|
||
|
|
("Wed Nov 24 2021", 8, 1, "Thu Nov 25 2021"),
|
||
|
|
("Wed Nov 24 2021", 11, 1, "Thu Nov 24 2022"),
|
||
|
|
("24-Nov-2021", 0, 1, "25-Nov-2021"),
|
||
|
|
("24-Nov-2021", 3, 1, "24-Dec-2021"),
|
||
|
|
("24-Nov-2021", 7, 1, "24-Nov-2022"),
|
||
|
|
("2021 Nov 24", 0, 1, "2022 Nov 24"),
|
||
|
|
("2021 Nov 24", 5, 1, "2021 Dec 24"),
|
||
|
|
("2021 Nov 24", 9, 1, "2021 Nov 25"),
|
||
|
|
("Nov 24, 2021", 0, 1, "Dec 24, 2021"),
|
||
|
|
("Nov 24, 2021", 4, 1, "Nov 25, 2021"),
|
||
|
|
("Nov 24, 2021", 8, 1, "Nov 24, 2022"),
|
||
|
|
("7:21:53 am", 0, 1, "8:21:53 am"),
|
||
|
|
("7:21:53 am", 3, 1, "7:22:53 am"),
|
||
|
|
("7:21:53 am", 5, 1, "7:21:54 am"),
|
||
|
|
("7:21:53 am", 8, 1, "7:21:53 pm"),
|
||
|
|
("7:21:53 AM", 0, 1, "8:21:53 AM"),
|
||
|
|
("7:21:53 AM", 3, 1, "7:22:53 AM"),
|
||
|
|
("7:21:53 AM", 5, 1, "7:21:54 AM"),
|
||
|
|
("7:21:53 AM", 8, 1, "7:21:53 PM"),
|
||
|
|
("7:21 am", 0, 1, "8:21 am"),
|
||
|
|
("7:21 am", 3, 1, "7:22 am"),
|
||
|
|
("7:21 am", 5, 1, "7:21 pm"),
|
||
|
|
("7:21 AM", 0, 1, "8:21 AM"),
|
||
|
|
("7:21 AM", 3, 1, "7:22 AM"),
|
||
|
|
("7:21 AM", 5, 1, "7:21 PM"),
|
||
|
|
("23:24:23", 1, 1, "00:24:23"),
|
||
|
|
("23:24:23", 3, 1, "23:25:23"),
|
||
|
|
("23:24:23", 6, 1, "23:24:24"),
|
||
|
|
("23:24", 1, 1, "00:24"),
|
||
|
|
("23:24", 3, 1, "23:25"),
|
||
|
|
];
|
||
|
|
|
||
|
|
for (original, cursor, amount, expected) in tests {
|
||
|
|
let rope = Rope::from_str(original);
|
||
|
|
let range = Range::new(cursor, cursor + 1);
|
||
|
|
assert_eq!(
|
||
|
|
DateTimeIncrementor::from_range(rope.slice(..), range)
|
||
|
|
.unwrap()
|
||
|
|
.increment(amount)
|
||
|
|
.1,
|
||
|
|
expected.into()
|
||
|
|
);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_invalid_date_times() {
|
||
|
|
let tests = [
|
||
|
|
"0000-00-00",
|
||
|
|
"1980-2-21",
|
||
|
|
"1980-12-1",
|
||
|
|
"12345",
|
||
|
|
"2020-02-30",
|
||
|
|
"1999-12-32",
|
||
|
|
"19-12-32",
|
||
|
|
"1-2-3",
|
||
|
|
"0000/00/00",
|
||
|
|
"1980/2/21",
|
||
|
|
"1980/12/1",
|
||
|
|
"12345",
|
||
|
|
"2020/02/30",
|
||
|
|
"1999/12/32",
|
||
|
|
"19/12/32",
|
||
|
|
"1/2/3",
|
||
|
|
"123:456:789",
|
||
|
|
"11:61",
|
||
|
|
"2021-55-12 08:12:54",
|
||
|
|
];
|
||
|
|
|
||
|
|
for invalid in tests {
|
||
|
|
let rope = Rope::from_str(invalid);
|
||
|
|
let range = Range::new(0, 1);
|
||
|
|
|
||
|
|
assert_eq!(DateTimeIncrementor::from_range(rope.slice(..), range), None)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|