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#[derive(Debug, Clone)]
enum PathPart<'a> {
Static(&'a str),
Param(&'a str),
ParamOpt(&'a str),
ParamRegex(&'a str, &'a str),
ParamOptRegex(&'a str, &'a str),
}
#[derive(Debug, Default, Clone)]
pub struct Path<'a> {
parts: Vec<PathPart<'a>>,
}
impl<'a> Path<'a> {
#[inline]
pub fn new() -> Self {
Self::default()
}
pub fn path(mut self, value: &'a str) -> Self {
if !value.is_empty() {
self.parts.push(PathPart::Static(value));
}
self
}
pub fn param(mut self, name: &'a str) -> Self {
self.parts.push(PathPart::Param(name));
self
}
pub fn param_opt(mut self, name: &'a str) -> Self {
self.parts.push(PathPart::ParamOpt(name));
self
}
pub fn param_regex(mut self, name: &'a str, regex: &'a str) -> Self {
self.parts.push(PathPart::ParamRegex(name, regex));
self
}
pub fn param_opt_regex(mut self, name: &'a str, regex: &'a str) -> Self {
self.parts.push(PathPart::ParamOptRegex(name, regex));
self
}
pub(crate) fn regex(&self) -> String {
let mut regex = vec![];
for part in &self.parts {
match part {
PathPart::Static(p) => regex.push(format!("/{}", p)),
PathPart::Param(p) => regex.push(format!("/(?P<{}>[^/]+)", p)),
PathPart::ParamOpt(p) => regex.push(format!("(/(?P<{}>[^/]+))?", p)),
PathPart::ParamRegex(p, r) => regex.push(format!("/(?P<{}>{})", p, r)),
PathPart::ParamOptRegex(p, r) => regex.push(format!("(/(?P<{}>{}))?", p, r)),
}
}
regex.join("")
}
}
impl<'a> Into<Path<'a>> for &'a str {
fn into(self) -> Path<'a> {
Path::new().path(self)
}
}
#[cfg(test)]
mod test {
use super::*;
#[test]
fn test_regex_param_static() {
let p = Path::new().path("foo").path("bar");
assert_eq!(p.regex(), "/foo/bar");
}
}