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use std::{fmt, str::FromStr};
use crate::util::parse_error::ParseError;
#[derive(Debug, PartialEq, Eq)]
pub struct Time {
pub seconds: u8,
pub minutes: u8,
pub hours: u8,
}
impl Time {
pub fn parse(time_string: &str) -> Result<Self, ParseError> {
assert_eq!(time_string.len(), 6);
if !time_string.is_ascii() {
return Err(ParseError::NonASCIICharacters);
}
let hours = time_string[0..2].parse::<u8>()?;
let minutes = time_string[2..4].parse::<u8>()?;
let seconds = time_string[4..6].parse::<u8>()?;
if hours > 24 || minutes > 60 || seconds > 60 {
Err(ParseError::NumberOutOfRange)
} else {
Ok(Time {
hours,
minutes,
seconds,
})
}
}
pub fn from_hms(hours: u8, minutes: u8, seconds: u8) -> Time {
assert!(hours <= 24);
assert!(minutes <= 60);
assert!(seconds <= 60);
Time {
hours,
minutes,
seconds,
}
}
pub fn seconds_since_midnight(&self) -> u32 {
let mins: u32 = u32::from(self.hours) * 60 + u32::from(self.minutes);
mins * 60 + u32::from(self.seconds)
}
}
impl FromStr for Time {
type Err = ParseError;
fn from_str(s: &str) -> Result<Self, ParseError> {
Self::parse(s)
}
}
impl fmt::Display for Time {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{:02}{:02}{:02}", self.hours, self.minutes, self.seconds)
}
}
#[derive(Debug, PartialEq, Eq)]
pub struct Date {
pub day: u8,
pub month: u8,
pub year: u8,
}
impl Date {
pub fn parse(date_string: &str) -> Result<Self, ParseError> {
assert_eq!(date_string.len(), 6);
if !date_string.is_ascii() {
return Err(ParseError::NonASCIICharacters);
}
let day = date_string[0..2].parse::<u8>()?;
let month = date_string[2..4].parse::<u8>()?;
let year = date_string[4..6].parse::<u8>()?;
if day > 31 || month > 12 {
Err(ParseError::NumberOutOfRange)
} else {
Ok(Date { day, month, year })
}
}
pub fn from_dmy(day: u8, month: u8, year: u8) -> Date {
assert!(day >= 1 && day <= 31);
assert!(month >= 1 && month <= 12);
assert!(year <= 99);
Date { day, month, year }
}
}
impl FromStr for Date {
type Err = ParseError;
fn from_str(s: &str) -> Result<Self, ParseError> {
Self::parse(s)
}
}
impl fmt::Display for Date {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{:02}{:02}{:02}", self.day, self.month, self.year)
}
}
#[cfg(test)]
mod test {
use super::{Date, Time};
#[test]
fn time_parse() {
assert_eq!("012345".parse::<Time>().unwrap(), Time::from_hms(1, 23, 45));
assert_eq!(
"152136".parse::<Time>().unwrap(),
Time::from_hms(15, 21, 36)
);
}
#[test]
fn time_parse_with_invalid_char_boundary() {
assert!(Time::parse("🌀aa").is_err());
}
#[test]
fn time_fmt() {
assert_eq!(format!("{}", Time::from_hms(1, 23, 45)), "012345");
}
#[test]
fn time_seconds_since_midnight() {
assert_eq!(
Time {
hours: 0,
minutes: 0,
seconds: 0
}
.seconds_since_midnight(),
0
);
assert_eq!(
Time {
hours: 1,
minutes: 2,
seconds: 3
}
.seconds_since_midnight(),
3600 + 120 + 3
);
}
#[test]
fn date_parse() {
assert_eq!("010118".parse::<Date>().unwrap(), Date::from_dmy(1, 1, 18));
assert_eq!("120757".parse::<Date>().unwrap(), Date::from_dmy(12, 7, 57));
}
#[test]
fn date_parse_with_invalid_char_boundary() {
assert!(Date::parse("🌀aa").is_err());
}
#[test]
fn date_fmt() {
assert_eq!(format!("{}", Date::from_dmy(5, 10, 18)), "051018");
}
proptest! {
#[test]
#[allow(unused_must_use)]
fn time_parse_back_to_original(h in 0u8..24, m in 0u8..60, s in 0u8..60) {
let time = Time::from_hms(h, m, s);
prop_assert_eq!(Time::parse(&format!("{}", time)).unwrap(), time);
}
#[test]
#[allow(unused_must_use)]
fn date_parse_back_to_original(d in 1u8..32, m in 1u8..13, y in 0u8..100) {
let date = Date::from_dmy(d, m, y);
prop_assert_eq!(Date::parse(&format!("{}", date)).unwrap(), date);
}
}
}