Detect exercise language

And ensure that all code blocks use the same language

1 files changed, 12 insertions, 0 deletions

diff --git a/lib/parse/page.js b/lib/parse/page.js
index 937d84e..cfe1da8 100644
--- a/lib/parse/page.js
+++ b/lib/parse/page.js
@@ -100,10 +100,22 @@ function parsePage(src, options) {
                 'type': 'code'
             });
 
+            // Languages in code blocks
+            var langs = _.pluck(codeNodes, 'lang');
+
+            // Check that they are all the same
+            var validLangs = _.all(_.map(langs, function(lang) {
+                return lang && lang === langs[0];
+            }));
+
+            // Main language
+            var lang = validLangs ? langs[0] : null;
+
             return {
                 id: id,
                 type: section.type,
                 content: render(nonCodeNodes),
+                lang: lang,
                 code: {
                     base: codeNodes[0].text,
                     solution: codeNodes[1].text,