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|
mod bibutils;
mod ris;
use std::sync::Arc;
use citeproc::{prelude::SupportedFormat, ClusterPosition, InitOptions, Processor};
use citeproc_db::PredefinedLocales;
use citeproc_io::{Cite, Reference};
use lsp_types::{MarkupContent, MarkupKind};
use once_cell::sync::Lazy;
use regex::Regex;
use crate::syntax::{bibtex, CstNode};
use self::{
bibutils::*,
ris::{RisLibrary, RisReference},
};
static APA_STYLE: &str = include_str!("citation/apa.csl");
static DOI_URL_PATTERN: &str = r#"https://doi.org/\[.*\]\(.*\)"#;
static DOI_URL_REGEX: Lazy<Regex> = Lazy::new(|| Regex::new(DOI_URL_PATTERN).unwrap());
pub fn render_citation(root: &bibtex::SyntaxNode, key: &str) -> Option<MarkupContent> {
let ris_reference = convert_to_ris(root, key)?;
let doi_url = get_doi_url_markdown(&ris_reference);
let csl_reference: Reference = ris_reference.into();
let html = generate_bibliography(csl_reference)?;
let mut markdown = html2md::parse_html(&html).trim().to_owned();
if markdown == "" {
return None;
}
if let Some(doi_url) = doi_url {
markdown = DOI_URL_REGEX
.replace(&markdown, doi_url.as_str())
.into_owned();
}
markdown = markdown
.replace("..", ".")
.replace("\\\'", "'")
.replace("\\-", "-")
.replace("\\\\textsubscript", "")
.replace("\\\\textsuperscript", "");
let content = MarkupContent {
kind: MarkupKind::Markdown,
value: markdown,
};
Some(content)
}
fn convert_to_ris(root: &bibtex::SyntaxNode, key: &str) -> Option<RisReference> {
let mut bib_code = String::new();
for string in root
.children()
.filter_map(bibtex::String::cast)
.filter(|string| string.name().is_some())
{
bib_code.push_str(&string.syntax().to_string());
}
let entry = root
.children()
.filter_map(bibtex::Entry::cast)
.find(|entry| entry.key().map(|key| key.to_string()).as_deref() == Some(key))
.filter(|entry| entry.fields().next().is_some())?;
bib_code.push_str(&entry.syntax().to_string());
bib_code = bib_code.replace("\\hypen", "-");
let ris_code = bibutils::convert(&bib_code, InputFormat::Biblatex, OutputFormat::Ris)?;
let ris_lib = RisLibrary::parse(ris_code.lines());
ris_lib
.references
.into_iter()
.find(|reference| reference.id.as_ref().map(AsRef::as_ref) == Some(key))
}
fn get_doi_url_markdown(ris_reference: &RisReference) -> Option<String> {
ris_reference
.doi
.as_ref()
.map(|doi| format!("[doi:{}](https://doi.org/{})", doi, doi))
}
fn generate_bibliography(reference: Reference) -> Option<String> {
let mut processor = Processor::new(InitOptions {
style: APA_STYLE,
format: SupportedFormat::Html,
fetcher: Some(Arc::new(PredefinedLocales::bundled_en_us())),
..InitOptions::default()
})
.ok()?;
let cite = Cite::basic(&reference.id);
let cluster_id = processor.new_cluster("texlab");
processor.insert_reference(reference);
processor.insert_cites(cluster_id, &[cite]);
processor
.set_cluster_order(&[ClusterPosition {
id: cluster_id,
note: Some(1),
}])
.unwrap();
Some(processor.get_bibliography().pop()?.value.to_string())
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_simple() {
let document = bibtex::parse(
r#"
@article{foo,
author = {Foo Bar},
title = {Baz Qux},
year = {2020}
}
"#,
);
let actual_md = render_citation(&document.root, "foo").unwrap();
let expected_md = MarkupContent {
kind: MarkupKind::Markdown,
value: "Bar, Foo. (2020). *Baz Qux*.".into(),
};
assert_eq!(actual_md, expected_md);
}
#[test]
fn test_string() {
let document = bibtex::parse(
r#"
@string{author = "Foo Bar"}
@article{foo,
author = author,
title = {Baz Qux},
year = {2020}
}
"#,
);
let actual_md = render_citation(&document.root, "foo").unwrap();
let expected_md = MarkupContent {
kind: MarkupKind::Markdown,
value: "Bar, Foo. (2020). *Baz Qux*.".into(),
};
assert_eq!(actual_md, expected_md);
}
#[test]
fn test_unknown_key() {
let document = bibtex::parse("");
let actual_md = render_citation(&document.root, "foo");
assert_eq!(actual_md, None);
}
}
|
