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use std::{error, fmt, ops::Deref, str::FromStr};
const DELIMITER: char = ',';
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct AlternativeNames(Vec<String>);
impl Deref for AlternativeNames {
type Target = [String];
fn deref(&self) -> &Self::Target {
&self.0
}
}
impl fmt::Display for AlternativeNames {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
for (i, name) in self.iter().enumerate() {
if i > 0 {
write!(f, "{}", DELIMITER)?;
}
write!(f, "{}", name)?;
}
Ok(())
}
}
#[derive(Clone, Debug, Eq, PartialEq)]
pub enum ParseError {
Empty,
InvalidName(String),
}
impl error::Error for ParseError {}
impl fmt::Display for ParseError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
Self::Empty => f.write_str("empty input"),
Self::InvalidName(s) => write!(f, "invalid name: {}", s),
}
}
}
impl FromStr for AlternativeNames {
type Err = ParseError;
fn from_str(s: &str) -> Result<Self, Self::Err> {
use crate::record::reference_sequence_name::is_valid_name;
if s.is_empty() {
return Err(ParseError::Empty);
}
s.split(DELIMITER)
.map(|name| {
if is_valid_name(name) {
Ok(name.into())
} else {
Err(ParseError::InvalidName(name.into()))
}
})
.collect::<Result<_, _>>()
.map(Self)
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_fmt() {
let alternative_names = AlternativeNames(vec![String::from("0")]);
assert_eq!(alternative_names.to_string(), "0");
let alternative_names = AlternativeNames(vec![String::from("0"), String::from("SQ.0")]);
assert_eq!(alternative_names.to_string(), "0,SQ.0");
}
#[test]
fn test_from_str() {
assert_eq!("0".parse(), Ok(AlternativeNames(vec![String::from("0")])));
assert_eq!(
"0,SQ.0".parse(),
Ok(AlternativeNames(vec![
String::from("0"),
String::from("SQ.0")
]))
);
assert_eq!("".parse::<AlternativeNames>(), Err(ParseError::Empty));
assert_eq!(
",".parse::<AlternativeNames>(),
Err(ParseError::InvalidName(String::from("")))
);
assert_eq!(
"0,*".parse::<AlternativeNames>(),
Err(ParseError::InvalidName(String::from("*")))
);
}
}