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use std::str::FromStr;
use super::MatchMaker;
use crate::{error, path::Path};
#[derive(Default, Debug, Clone)]
pub struct Depth {
min: usize,
max: Option<usize>,
}
impl Depth {
pub fn new(min: usize, max: Option<usize>) -> Self {
Self { min, max }
}
}
impl MatchMaker for Depth {
fn match_path(&self, path: &Path) -> bool {
let depth = path.depth();
if let Some(max) = self.max {
self.min <= depth && depth <= max
} else {
self.min <= depth
}
}
}
impl FromStr for Depth {
type Err = error::Matcher;
fn from_str(s: &str) -> Result<Self, Self::Err> {
let splitted: Vec<&str> = s.splitn(2, '-').collect();
match splitted.len() {
1 => match splitted[0].parse() {
Ok(start) => Ok(Self::new(start, Some(start))),
Err(_) => Err(error::Matcher::Parse(s.into())),
},
2 => match (splitted[0].parse(), splitted[1].parse()) {
(Ok(start), Ok(end)) => {
if start > end {
Err(error::Matcher::Parse(s.into()))
} else {
Ok(Self::new(start, Some(end)))
}
}
(Ok(start), _) if splitted[1].is_empty() => Ok(Self::new(start, None)),
_ => Err(error::Matcher::Parse(s.into())),
},
_ => Err(error::Matcher::Parse(s.into())),
}
}
}
#[cfg(test)]
mod tests {
use super::{Depth, MatchMaker};
use crate::path::Path;
use std::{convert::TryFrom, str::FromStr};
#[test]
fn match_path() {
let depth = Depth::from_str("2-").unwrap();
assert!(!depth.match_path(&Path::try_from(r#"{"People"}"#).unwrap()));
assert!(depth.match_path(&Path::try_from(r#"{"People"}[0]"#).unwrap()));
assert!(depth.match_path(&Path::try_from(r#"{"People"}[0]{"Age"}"#).unwrap()));
assert!(depth.match_path(&Path::try_from(r#"{"People"}[0]{"Height"}"#).unwrap()));
assert!(depth.match_path(&Path::try_from(r#"{"People"}[1]"#).unwrap()));
assert!(depth.match_path(&Path::try_from(r#"{"People"}[1]{"Age"}"#).unwrap()));
assert!(depth.match_path(&Path::try_from(r#"{"People"}[1]{"Height"}"#).unwrap()));
let depth: Depth = "2-2".parse().unwrap();
assert!(!depth.match_path(&Path::try_from(r#"{"People"}"#).unwrap()));
assert!(depth.match_path(&Path::try_from(r#"{"People"}[0]"#).unwrap()));
assert!(!depth.match_path(&Path::try_from(r#"{"People"}[0]{"Age"}"#).unwrap()));
assert!(!depth.match_path(&Path::try_from(r#"{"People"}[0]{"Height"}"#).unwrap()));
assert!(depth.match_path(&Path::try_from(r#"{"People"}[1]"#).unwrap()));
assert!(!depth.match_path(&Path::try_from(r#"{"People"}[1]{"Age"}"#).unwrap()));
assert!(!depth.match_path(&Path::try_from(r#"{"People"}[1]{"Height"}"#).unwrap()));
let depth: Depth = "2".parse().unwrap();
assert!(!depth.match_path(&Path::try_from(r#"{"People"}"#).unwrap()));
assert!(depth.match_path(&Path::try_from(r#"{"People"}[0]"#).unwrap()));
assert!(!depth.match_path(&Path::try_from(r#"{"People"}[0]{"Age"}"#).unwrap()));
assert!(!depth.match_path(&Path::try_from(r#"{"People"}[0]{"Height"}"#).unwrap()));
assert!(depth.match_path(&Path::try_from(r#"{"People"}[1]"#).unwrap()));
assert!(!depth.match_path(&Path::try_from(r#"{"People"}[1]{"Age"}"#).unwrap()));
assert!(!depth.match_path(&Path::try_from(r#"{"People"}[1]{"Height"}"#).unwrap()));
}
#[test]
fn depth_parse() {
assert!(Depth::from_str("").is_err());
assert!(Depth::from_str("-").is_err());
assert!(Depth::from_str("4").is_ok());
assert!(Depth::from_str("4-").is_ok());
assert!(Depth::from_str("4-5").is_ok());
assert!(Depth::from_str("4-4").is_ok());
assert!(Depth::from_str("4-3").is_err());
assert!(Depth::from_str("4-3x").is_err());
}
}