2 files changed, 55 insertions, 2 deletions
diff --git a/lib/backbone/glossary.js b/lib/backbone/glossary.js
index 22c4d42..9aed1ac 100644
--- a/lib/backbone/glossary.js
+++ b/lib/backbone/glossary.js
@@ -32,6 +32,9 @@ GlossaryEntry.prototype.getId = function() {
 };
 
 
+/*
+A glossary is a list of entries stored in a GLOSSARY.md file
+*/
 function Glossary() {
     BackboneFile.apply(this, arguments);
 
diff --git a/lib/backbone/langs.js b/lib/backbone/langs.js
index 2818519..a40bd80 100644
--- a/lib/backbone/langs.js
+++ b/lib/backbone/langs.js
@@ -1,15 +1,65 @@
+var _ = require('lodash');
+var path = require('path');
+var util = require('util');
+var BackboneFile = require('./file');
 
+function Language(title, folder) {
+    var that = this;
+
+    this.title = title;
+    this.folder = folder;
+
+    Object.defineProperty(this, 'id', {
+        get: function() {
+            return path.basename(that.folder);
+        }
+    });
+}
+
+/*
+A Langs is a list of languages stored in a LANGS.md file
+*/
 function Langs() {
-    if (!(this instanceof Langs)) return new Langs();
+    BackboneFile.apply(this, arguments);
 
     this.languages = [];
 }
+util.inherits(Langs, BackboneFile);
 
 Langs.prototype.type = 'langs';
 
+// Parse the readme content
+Langs.prototype.parse = function(content) {
+    var that = this;
+
+    return this.parser.langs(content)
+    .then(function(langs) {
+        that.languages = _.map(langs, function(entry) {
+            return new Language(entry.title, entry.path);
+        });
+    });
+};
+
+// Return the list of languages
+Langs.prototype.list = function() {
+    return this.languages;
+};
+
+// Return default/main language for the book
+Langs.prototype.getDefault = function() {
+    return _.first(this.languages);
+};
+
+// Return true if a language is the default one
+// "lang" cam be a string (id) or a Language entry
+Langs.prototype.isDefault = function(lang) {
+    lang = lang.id || lang;
+    return (this.cound() > 0 && this.getDefault().id == lang);
+};
+
 // Return the count of languages
 Langs.prototype.count = function() {
-    return this.languages.length;
+    return _.size(this.languages);
 };
 
 module.exports = Langs;