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use std::borrow::Cow;
use lib::Report;
use rnix::{parser::ParseError as RnixParseErr, WalkEvent};
use crate::{
fix::{FixResult, Fixed},
LintMap,
};
fn collect_fixes(source: &str, lints: &LintMap) -> Result<Vec<Report>, RnixParseErr> {
let parsed = rnix::parse(source).as_result()?;
Ok(parsed
.node()
.preorder_with_tokens()
.filter_map(|event| match event {
WalkEvent::Enter(child) => lints.get(&child.kind()).map(|rules| {
rules
.iter()
.filter_map(|rule| rule.validate(&child))
.filter(|report| report.total_suggestion_range().is_some())
.collect::<Vec<_>>()
}),
_ => None,
})
.flatten()
.collect())
}
fn reorder(mut reports: Vec<Report>) -> Vec<Report> {
use std::collections::VecDeque;
reports.sort_by(|a, b| {
let a_range = a.range();
let b_range = b.range();
a_range.end().partial_cmp(&b_range.end()).unwrap()
});
reports
.into_iter()
.fold(VecDeque::new(), |mut deque: VecDeque<Report>, new_elem| {
let front = deque.front();
let new_range = new_elem.range();
if let Some(front_range) = front.map(|f| f.range()) {
if new_range.start() > front_range.end() {
deque.push_front(new_elem);
}
} else {
deque.push_front(new_elem);
}
deque
})
.into()
}
impl<'a> Iterator for FixResult<'a> {
type Item = FixResult<'a>;
fn next(&mut self) -> Option<Self::Item> {
let all_reports = collect_fixes(&self.src, &self.lints).ok()?;
if all_reports.is_empty() {
return None;
}
let reordered = reorder(all_reports);
let fixed = reordered
.iter()
.map(|r| Fixed {
at: r.range(),
code: r.code,
})
.collect::<Vec<_>>();
for report in reordered {
report.apply(self.src.to_mut());
}
Some(FixResult {
src: self.src.clone(),
fixed,
lints: self.lints,
})
}
}
pub fn all_with<'a>(src: &'a str, lints: &'a LintMap) -> Option<FixResult<'a>> {
let src = Cow::from(src);
let _ = rnix::parse(&src).as_result().ok()?;
let initial = FixResult::empty(src, lints);
initial.into_iter().last()
}
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