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use std::sync::OnceLock;
use regex::Regex;
use serde::{Deserialize, Serialize};
static RULE_RE: OnceLock<Regex> = OnceLock::new();
#[derive(Debug, thiserror::Error)]
pub(crate) enum RuleError {
#[error("invalid rule format: {0}")]
InvalidRule(String),
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub(crate) struct Rule {
pub tool: String,
pub scope: Option<String>,
}
impl std::fmt::Display for Rule {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self.scope.as_ref() {
Some(scope) => write!(f, "{}({})", self.tool, scope),
None => write!(f, "{}", self.tool),
}
}
}
impl Serialize for Rule {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: serde::Serializer,
{
serializer.serialize_str(&self.to_string())
}
}
impl<'de> Deserialize<'de> for Rule {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: serde::Deserializer<'de>,
{
let s = String::deserialize(deserializer)?;
Self::try_from(s.as_str()).map_err(serde::de::Error::custom)
}
}
impl TryFrom<&str> for Rule {
type Error = RuleError;
fn try_from(value: &str) -> Result<Self, Self::Error> {
let value = value.trim();
let re = RULE_RE.get_or_init(|| Regex::new(r"^(\w+)(?:\((.*)\))?$").unwrap());
let caps = re
.captures(value)
.ok_or(RuleError::InvalidRule(value.to_string()))?;
let tool = caps.get(1).unwrap().as_str().to_string();
let scope = caps.get(2).map(|m| m.as_str().to_string());
Ok(Rule { tool, scope })
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_rule_try_from() {
assert_eq!(
Rule::try_from("Read").unwrap(),
Rule {
tool: "Read".to_string(),
scope: None
}
);
assert_eq!(
Rule::try_from("Read(*)").unwrap(),
Rule {
tool: "Read".to_string(),
scope: Some("*".to_string())
}
);
assert_eq!(
Rule::try_from("Write(*.md)").unwrap(),
Rule {
tool: "Write".to_string(),
scope: Some("*.md".to_string())
}
);
assert_eq!(
Rule::try_from("Shell(git commit *)").unwrap(),
Rule {
tool: "Shell".to_string(),
scope: Some("git commit *".to_string())
}
);
assert_eq!(
Rule::try_from("Shell(echo ())").unwrap(),
Rule {
tool: "Shell".to_string(),
scope: Some("echo ()".to_string())
}
);
assert!(Rule::try_from("Shell(git commit *").is_err());
assert!(Rule::try_from("Shell(git commit *)!").is_err());
}
}
|
