javascript to start the class oh yeaaah

2 files changed, 62 insertions, 1 deletions

diff --git a/assets/html/main.html b/assets/html/main.html
index b69cf3c..8d6c09d 100644
--- a/assets/html/main.html
+++ b/assets/html/main.html
@@ -39,6 +39,6 @@
 
     <script src="js/vendor/bootstrap.min.js"></script>
 
-    <!-- <script src="js/main.js"></script> -->
+    <script src="js/main.js"></script>
   </body>
 </html>
diff --git a/assets/js/main.js b/assets/js/main.js
index e69de29..b89bcef 100644
--- a/assets/js/main.js
+++ b/assets/js/main.js
@@ -0,0 +1,61 @@
+// famous functions from <http://www.quirksmode.org/js/cookies.html>
+
+function createCookie(name,value,days) {
+    if (days) {
+        var date = new Date();
+        date.setTime(date.getTime()+(days*24*60*60*1000));
+        var expires = "; expires="+date.toGMTString();
+    }
+    else var expires = "";
+    document.cookie = name+"="+value+expires+"; path=/";
+}
+
+function readCookie(name) {
+    var nameEQ = name + "=";
+    var ca = document.cookie.split(';');
+    for(var i=0;i < ca.length;i++) {
+        var c = ca[i];
+        while (c.charAt(0)==' ') c = c.substring(1,c.length);
+        if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
+    }
+    return null;
+}
+
+function eraseCookie(name) {
+    createCookie(name,"",-1);
+}
+
+// start a new class
+
+function startLesson()
+{
+    var oldCookie = readCookie("class_cookie");
+    // bail out if we've already started a class (the cookie will
+    // always be set cos our CGI monad always sets it)
+    if (oldCookie != "Nothing")
+        return false;
+
+    // get input
+    var theGrade = prompt("What grade?", "");
+    var theClass = prompt("What class?", "");
+    cookieString = theGrade + "-" + theClass
+
+    // validate
+    var valRegExp = new RegExp("^[0-9]-[0-9]$");
+    if (valRegExp.test(cookieString) == false)
+    {
+        alert ("invalid class!");
+        return false;
+    }
+
+    // set the cookie and reload to start the session
+    createCookie("class_cookie", cookieString, 1);
+    location.reload(true);
+}
+
+// bind to buttons
+
+$(document).ready(function(){
+    $('#start-lesson').button();
+    $('#start-lesson').click(function (){ startLesson(); });
+});