143 lines
3.2 KiB
Rust
143 lines
3.2 KiB
Rust
use error::MarkdownErrorKind as MEK;
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use result::Result;
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use hoedown::renderer::Render;
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use hoedown::Buffer;
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use hoedown::Markdown;
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use url::Url;
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use libimagerror::into::IntoError;
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct Link {
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pub title: String,
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pub link: String,
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}
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impl Link {
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/// Translate a `Link` into a `UrlLink`
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fn into_urllink(self) -> Result<UrlLink> {
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Url::parse(&self.link[..])
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.map(move |link| UrlLink { title: self.title, link: link, })
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.map_err(Box::new)
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.map_err(|e| MEK::LinkParsingError.into_error_with_cause(e))
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}
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}
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pub struct UrlLink {
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pub title: String,
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pub link: Url,
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}
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struct LinkExtractor {
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links: Vec<Link>,
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}
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impl LinkExtractor {
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pub fn new() -> LinkExtractor {
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LinkExtractor { links: vec![] }
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}
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pub fn links(self) -> Vec<Link> {
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self.links
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}
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}
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impl Render for LinkExtractor {
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fn link(&mut self,
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_: &mut Buffer,
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content: Option<&Buffer>,
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link: Option<&Buffer>,
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_: Option<&Buffer>)
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-> bool
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{
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let link = link.and_then(|l| l.to_str().ok()).map(String::from);
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let content = content.and_then(|l| l.to_str().ok()).map(String::from);
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match (link, content) {
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(Some(link), Some(content)) => {
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self.links.push(Link { link: link, title: content });
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false
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},
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(_, _) => {
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false
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},
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}
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}
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}
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pub fn extract_links(buf: &str) -> Vec<Link> {
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let mut le = LinkExtractor::new();
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le.render(&Markdown::new(buf));
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le.links()
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}
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#[cfg(test)]
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mod test {
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use super::{Link, extract_links};
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#[test]
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fn test_one_link() {
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let testtext = "Some [example text](http://example.com).";
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let exp = Link {
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title: String::from("example text"),
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link: String::from("http://example.com"),
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};
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let mut links = extract_links(testtext);
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assert_eq!(1, links.len());
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assert_eq!(exp, links.pop().unwrap())
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}
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#[test]
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fn test_two_similar_links() {
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let testtext = r#"
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Some [example text](http://example.com).
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Some more [example text](http://example.com).
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"#;
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let exp = Link {
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title: String::from("example text"),
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link: String::from("http://example.com"),
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};
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let mut links = extract_links(&testtext[..]);
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assert_eq!(2, links.len());
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assert_eq!(exp, links.pop().unwrap());
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assert_eq!(exp, links.pop().unwrap());
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}
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#[test]
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fn test_two_links() {
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let testtext = r#"
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Some [example text](http://example.com).
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Some more [foo](http://example.com/foo).
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"#;
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let exp1 = Link {
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title: String::from("example text"),
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link: String::from("http://example.com"),
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};
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let exp2 = Link {
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title: String::from("foo"),
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link: String::from("http://example.com/foo"),
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};
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let mut links = extract_links(&testtext[..]);
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assert_eq!(2, links.len());
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assert_eq!(exp2, links.pop().unwrap());
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assert_eq!(exp1, links.pop().unwrap());
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}
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}
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