Rewrite markdown parsing, so we can extract links and quotes (and maybe more)

src/module/helpers/content.rs

@@ -1,10 +1,22 @@
-
-pub fn extract_links(s: &String) -> Vec<String> {
+mod markdown {
     use pulldown_cmark::Parser;
     use pulldown_cmark::Event;
     use pulldown_cmark::Tag;
 
-    Parser::new(&s[..])
+    pub struct MarkdownParser<'a> {
+        text: &'a String
+    }
+
+    impl<'a> MarkdownParser<'a> {
+
+        pub fn new(s: &'a String) -> MarkdownParser {
+            MarkdownParser {
+                text: s
+            }
+        }
+
+        pub fn links(&self) -> Vec<String> {
+            Parser::new(&self.text[..])
                 .filter_map(|e| {
                     match e {
                         Event::Start(t) => Some(t),
@@ -23,3 +35,26 @@ pub fn extract_links(s: &String) -> Vec<String> {
                 }).collect::<Vec<String>>()
         }
 
+        pub fn codeblocks(&self) -> Vec<String> {
+            Parser::new(&self.text[..])
+                .filter_map(|e| {
+                    match e {
+                        Event::Start(t) => Some(t),
+                        Event::End(t)   => Some(t),
+                        _               => None
+                    }
+                })
+                .filter_map(|tag| {
+                    match tag {
+                        Tag::CodeBlock(text)    => Some(text),
+                        _                       => None
+                    }
+                })
+                .map(|text| {
+                    text.into_owned()
+                }).collect::<Vec<String>>()
+        }
+
+    }
+
+}