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use std::convert::TryInto;
use std::fmt::{Debug, Display};
use chrono::{NaiveTime, Timelike};
/// An hour+minute struct that can go up to 48h.
#[derive(Clone, Copy, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct ExtendedTime {
hour: u8,
minute: u8,
}
impl ExtendedTime {
/// 00:00 (start of day)
pub const MIDNIGHT_00: Self = Self::new(0, 0).unwrap();
/// 24:00 (end of day)
pub const MIDNIGHT_24: Self = Self::new(24, 0).unwrap();
/// 48:00 (end of next day)
pub const MIDNIGHT_48: Self = Self::new(48, 0).unwrap();
/// Create a new extended time, this may return `None` if input values are
/// out of range.
///
/// ```
/// use opening_hours_syntax::ExtendedTime;
///
/// assert!(ExtendedTime::new(28, 30).is_some());
/// assert!(ExtendedTime::new(72, 15).is_none()); // hours are out of bound
/// assert!(ExtendedTime::new(24, 60).is_none()); // minutes are out of bound
/// ```
#[inline]
pub const fn new(hour: u8, minute: u8) -> Option<Self> {
if hour > 48 || minute > 59 || (hour == 48 && minute > 0) {
None
} else {
Some(Self { hour, minute })
}
}
/// Get the number of full hours in this extended time.
///
/// ```
/// use opening_hours_syntax::ExtendedTime;
///
/// let time = ExtendedTime::new(27, 35).unwrap();
/// assert_eq!(time.hour(), 27);
/// ```
#[inline]
pub fn hour(self) -> u8 {
self.hour
}
/// Get the number of remaining minutes in this extended time.
///
/// ```
/// use opening_hours_syntax::ExtendedTime;
///
/// let time = ExtendedTime::new(27, 35).unwrap();
/// assert_eq!(time.minute(), 35);
/// ```
#[inline]
pub fn minute(self) -> u8 {
self.minute
}
/// Add plain minutes to the extended time and return `None` if this
/// results in it being out of bounds.
///
/// ```
/// use opening_hours_syntax::ExtendedTime;
///
/// let time = ExtendedTime::new(24, 0).unwrap();
/// assert_eq!(time.add_minutes(75), ExtendedTime::new(25, 15));
/// assert!(time.add_minutes(24 * 60 + 1).is_none());
/// assert!(time.add_minutes(-24 * 60 - 1).is_none());
/// ```
#[inline]
pub fn add_minutes(self, minutes: i16) -> Option<Self> {
let as_minutes = (self.mins_from_midnight() as i16).checked_add(minutes)?;
Self::from_mins_from_midnight(as_minutes.try_into().ok()?)
}
/// Add plain hours to the extended time and return `None` if this results
/// in it being out of bounds.
///
/// ```
/// use opening_hours_syntax::ExtendedTime;
///
/// let time = ExtendedTime::new(24, 15).unwrap();
/// assert_eq!(time.add_hours(3), ExtendedTime::new(27, 15));
/// assert!(time.add_hours(25).is_none());
/// assert!(time.add_hours(-25).is_none());
/// ```
#[inline]
pub fn add_hours(self, hours: i8) -> Option<Self> {
Self::new(
(i16::from(self.hour) + i16::from(hours)).try_into().ok()?,
self.minute,
)
}
/// Get the total number of minutes from *00:00*.
///
/// ```
/// use opening_hours_syntax::ExtendedTime;
///
/// let time = ExtendedTime::new(25, 15).unwrap();
/// assert_eq!(time.mins_from_midnight(), 25 * 60 + 15);
/// ```
#[inline]
pub fn mins_from_midnight(self) -> u16 {
u16::from(self.minute) + 60 * u16::from(self.hour)
}
/// Build an extended time from the total number of minutes from midnight
/// and return `None` if the result is out of bounds.
///
/// ```
/// use opening_hours_syntax::ExtendedTime;
///
/// assert_eq!(
/// ExtendedTime::from_mins_from_midnight(26 * 60 + 15),
/// ExtendedTime::new(26, 15),
/// );
///
/// assert!(ExtendedTime::from_mins_from_midnight(65_000).is_none());
/// ```
#[inline]
pub fn from_mins_from_midnight(minute: u16) -> Option<Self> {
let hour = (minute / 60).try_into().ok()?;
let minute = (minute % 60).try_into().ok()?;
Self::new(hour, minute)
}
}
impl Display for ExtendedTime {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "{:02}:{:02}", self.hour, self.minute)
}
}
impl Debug for ExtendedTime {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::result::Result<(), std::fmt::Error> {
write!(f, "{self}")
}
}
impl TryInto<NaiveTime> for ExtendedTime {
type Error = ();
#[inline]
fn try_into(self) -> Result<NaiveTime, Self::Error> {
NaiveTime::from_hms_opt(self.hour.into(), self.minute.into(), 0).ok_or(())
}
}
impl From<NaiveTime> for ExtendedTime {
#[inline]
fn from(time: NaiveTime) -> ExtendedTime {
Self {
hour: time.hour().try_into().expect("invalid NaiveTime"),
minute: time.minute().try_into().expect("invalid NaiveTime"),
}
}
}