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use super::Error;
use hifitime::{Duration, Unit, SECONDS_PER_DAY, SECONDS_PER_HOUR, SECONDS_PER_MINUTE};
#[derive(Debug, Copy, Clone, PartialEq)]
pub struct FFU {
/// Sample rate
pub val: u32,
/// Period unit
pub unit: Unit,
}
impl From<Duration> for FFU {
fn from(dt: Duration) -> Self {
let total_seconds = dt.to_seconds();
if dt < SECONDS_PER_MINUTE * Unit::Second {
Self {
val: total_seconds.round() as u32,
unit: Unit::Second,
}
} else if dt < 1.0 * Unit::Hour {
Self {
val: (total_seconds / SECONDS_PER_MINUTE).round() as u32,
unit: Unit::Minute,
}
} else if dt < 1 * Unit::Day {
Self {
val: (total_seconds / SECONDS_PER_HOUR).round() as u32,
unit: Unit::Hour,
}
} else {
Self {
val: (total_seconds / SECONDS_PER_DAY).round() as u32,
unit: Unit::Day,
}
}
}
}
impl Default for FFU {
fn default() -> Self {
Self {
val: 30,
unit: Unit::Second,
}
}
}
impl std::fmt::Display for FFU {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
match self.unit {
Unit::Minute => write!(f, "{:02}M", self.val),
Unit::Hour => write!(f, "{:02}H", self.val),
Unit::Day => write!(f, "{:02}D", self.val),
Unit::Second | _ => write!(f, "{:02}S", self.val),
}
}
}
impl std::str::FromStr for FFU {
type Err = Error;
fn from_str(s: &str) -> Result<Self, Self::Err> {
if s.len() < 3 {
return Err(Error::InvalidFFU);
}
let val = s[..2].parse::<u32>().map_err(|_| Error::InvalidFFU)?;
let unit = match s.chars().nth(2) {
Some('S') => Unit::Second,
Some('M') => Unit::Minute,
Some('H') => Unit::Hour,
Some('D') => Unit::Day,
_ => return Err(Error::InvalidFFU),
};
Ok(Self { val, unit })
}
}
#[cfg(test)]
mod test {
use super::FFU;
use hifitime::{Duration, Unit, SECONDS_PER_DAY};
use std::str::FromStr;
#[test]
fn ffu_parsing() {
for (desc, expected) in [
(
"30S",
FFU {
val: 30,
unit: Unit::Second,
},
),
(
"01M",
FFU {
val: 1,
unit: Unit::Minute,
},
),
(
"15M",
FFU {
val: 15,
unit: Unit::Minute,
},
),
(
"30M",
FFU {
val: 30,
unit: Unit::Minute,
},
),
(
"01H",
FFU {
val: 1,
unit: Unit::Hour,
},
),
(
"04H",
FFU {
val: 4,
unit: Unit::Hour,
},
),
(
"08H",
FFU {
val: 8,
unit: Unit::Hour,
},
),
(
"01D",
FFU {
val: 1,
unit: Unit::Day,
},
),
(
"07D",
FFU {
val: 7,
unit: Unit::Day,
},
),
] {
let ffu = FFU::from_str(desc).unwrap();
assert_eq!(ffu, expected);
}
}
#[test]
fn ffu_cast() {
for (duration, expected) in [
(
Duration::from_seconds(30.0),
FFU {
val: 30,
unit: Unit::Second,
},
),
(
Duration::from_seconds(60.0),
FFU {
val: 1,
unit: Unit::Minute,
},
),
(
Duration::from_seconds(3600.0),
FFU {
val: 1,
unit: Unit::Hour,
},
),
(
Duration::from_seconds(SECONDS_PER_DAY),
FFU {
val: 1,
unit: Unit::Day,
},
),
] {
assert_eq!(FFU::from(duration), expected);
}
}
}