2016-05-23 12:11:32 +00:00
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use result::Result;
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2016-05-24 14:30:06 +00:00
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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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2016-05-25 11:37:14 +00:00
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#[derive(Debug, Clone, PartialEq, Eq)]
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2016-05-24 14:30:06 +00:00
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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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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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2016-05-23 12:11:32 +00:00
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}
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