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use codespan::{FileId, Files, Span};
use linkcheck::Link;
use pulldown_cmark::{BrokenLink, CowStr};
use std::{cell::RefCell, fmt::Debug};
pub fn extract<I>(
target_files: I,
files: &Files<String>,
) -> (Vec<Link>, Vec<IncompleteLink>)
where
I: IntoIterator<Item = FileId>,
{
let mut links = Vec::new();
let broken_links = RefCell::new(Vec::new());
for file_id in target_files {
let src = files.source(file_id);
log::debug!("Scanning {}", files.name(file_id).to_string_lossy());
links.extend(scan_links(file_id, &*src, &mut |broken_link| {
let BrokenLink {
reference, span, ..
} = broken_link;
log::debug!(
"Found a (possibly) broken link to [{}] at {:?}",
reference,
span
);
broken_links.borrow_mut().push(IncompleteLink {
reference: broken_link.reference.to_string(),
span: Span::new(span.start as u32, span.end as u32),
file: file_id,
});
None
}));
}
(links, broken_links.into_inner())
}
fn scan_links<'a, F>(
file_id: FileId,
src: &'a str,
cb: &'a mut F,
) -> impl Iterator<Item = Link> + 'a
where
F: FnMut(BrokenLink<'_>) -> Option<(CowStr<'a>, CowStr<'a>)> + 'a,
{
linkcheck::scanners::markdown_with_broken_link_callback(src, Some(cb))
.map(move |(link, span)| Link::new(link, span, file_id))
}
#[derive(Debug, Clone, PartialEq)]
pub struct IncompleteLink {
pub reference: String,
pub file: FileId,
pub span: Span,
}