Start implementing #29 support for embedding playpen, implemented the function that parses the markdown to find playpen links

src/renderer/html_handlebars/hbs_renderer.rs

@@ -72,6 +72,7 @@ impl Renderer for HtmlHandlebars {
                         try!(f.read_to_string(&mut content));
 
                         // Render markdown using the pulldown-cmark crate
+                        helpers::playpen::render_playpen(&mut content);
                         content = utils::render_markdown(&content);
                         print_content.push_str(&content);
 

src/renderer/html_handlebars/helpers/mod.rs

@@ -1,2 +1,3 @@
 pub mod navigation;
 pub mod toc;
+pub mod playpen;

src/renderer/html_handlebars/helpers/playpen.rs

@@ -0,0 +1,53 @@
+use std::path::{Path, PathBuf};
+
+pub fn render_playpen(s: &mut str) {
+
+    for playpen in find_playpens(s) {
+        println!("Playpen{{ {}, {}, {:?}, {} }}", playpen.start_index, playpen.end_index, playpen.rust_file, playpen.editable);
+    }
+
+}
+
+struct Playpen{
+    start_index: u32,
+    end_index: u32,
+    rust_file: PathBuf,
+    editable: bool
+}
+
+fn find_playpens(s: &str) -> Vec<Playpen> {
+    let mut playpens = vec![];
+    for (i, _) in s.match_indices("{{#playpen") {
+        println!("[*]: find_playpen");
+
+        // DON'T forget the "+ i" else you have an index out of bounds error !!
+        let end_i = if let Some(n) = s[i..].find("}}") { n } else { continue } + i + 2;
+
+        println!("s[{}..{}] = {}", i, end_i, s[i..end_i].to_string());
+
+        // If there is nothing between "{{#playpen" and "}}" skip
+        if end_i-2 - (i+10) < 1 { continue }
+        if s[i+10..end_i-2].trim().len() == 0 { continue }
+
+        println!("{}", s[i+10..end_i-2].to_string());
+
+        // Split on whitespaces
+        let params: Vec<&str> = s[i+10..end_i-2].split_whitespace().collect();
+        let mut editable = false;
+
+        if params.len() > 1 {
+            editable = if let Some(_) = params[1].find("editable") {true} else {false};
+        }
+
+        playpens.push(
+            Playpen{
+                start_index: i as u32,
+                end_index: end_i as u32,
+                rust_file: PathBuf::from(params[0]),
+                editable: editable,
+            }
+        )
+    }
+
+    playpens
+}