Random articles.

www/index.html

@@ -76,6 +76,7 @@
                     or <a href="#" id="btnArticlesNearby">Find articles around me (work in progress)</a><br/>
                     Longitude/Latitude:
                     <input type="text" id="longitude" size="8" /> <input type="text" id="latitude" size="8" /><br/>
+                    or <a href="#" id="btnRandomArticle">Go to a random article</a><br/>
                     <div id="searchingForTitles" style="position: relative; z-index: 10; top: 20px; height: 0px; display: none;">
                         <img src="img/spinner.gif" alt="Please wait..." />
                     </div>

www/js/app.js

@@ -73,6 +73,14 @@ define(function(require) {
             $('#navbarToggle').click();
         }
     });
+    $("#btnRandomArticle").on("click", function(e) {
+        goToRandomArticle();
+        $("#welcomeText").hide();
+        $("#readingArticle").hide();
+        if ($('#navbarToggle').is(":visible") && $('#liHomeNav').is(':visible')) {
+            $('#navbarToggle').click();
+        }
+    });
     // Bottom bar :
     $('#btnBack').on('click', function(e) {
         history.back();
@@ -580,4 +588,18 @@ define(function(require) {
         }
     }
 
+    function goToRandomArticle() {
+        localArchive.getRandomTitle(function(title) {
+            if (title === null || title === undefined) {
+                alert("Error finding random article.");
+            }
+            else {
+                $("#articleName").html(title.name);
+                $("#readingArticle").show();
+                $("#articleContent").html("");
+                readArticle(title);
+            }
+        });
+    }
+
 });

www/js/lib/archive.js

@@ -361,7 +361,16 @@ define(function(require) {
      * @param callbackFunction
      */
     LocalArchive.prototype.getRandomTitle = function(callbackFunction) {
-        // TODO to be implemented
+        var that = this;
+        var offset = Math.floor(Math.random() * this.titleFile.size);
+        jQuery.when().then(function() {
+            var iterator = new titleIterators.SequentialTitleIterator(that, offset);
+            // call advance twice because we are probably not at the beginning
+            // of a title
+            return iterator.advance().then(function() {
+                return iterator.advance();
+            });
+        }).then(callbackFunction, errorHandler);
     };
 
     /**