Prism code rendering

src/renderer.js

@@ -1,5 +1,6 @@
 const fs = require('fs');
 const showdown = require('showdown');
+const Prism = require('node-prismjs');
 
 module.exports = (config) => {
   const converter = new showdown.Converter(config['showdown']);
@@ -8,9 +9,29 @@ module.exports = (config) => {
       fs.readFile(file, {encoding: 'UTF-8'}, (err, data) => {
         if (err)
           return cb(err);
+
+        if (config['modules']['prism']) {
+          const codeRegex = /```([\w-]+)\n((?:(?!```)[\s\S])*)\n```/m;
+          let match;
+          while ((match = codeRegex.exec(data))) {
+            const lang = match[1].trim();
+            const code = match[2].trim();
+            try {
+              const block = Prism.highlight(code, Prism.languages[lang] || Prism.languages.autoit, lang);
+              data = data.slice(0, match.index) + `<pre><code class="${lang} language-${lang}">` + block + '</code></pre>' + data.slice(match.index + match[0].length);
+            } catch (err) {
+              console.error(err);
+            }
+          }
+        }
+
+
         const html = converter.makeHtml(data);
+
+
         cb(null, html);
       });
     }
   };
-};
+};
+