Add a password strength meter.

1 files changed, 39 insertions, 0 deletions

diff --git a/modules/user/js/password_strength.js b/modules/user/js/password_strength.js
new file mode 100644
index 00000000..2442b8de
--- /dev/null
+++ b/modules/user/js/password_strength.js
@@ -0,0 +1,39 @@
+(function($) {
+   // Based on the Password Strength Indictor By Benjamin Sterling
+   // http://benjaminsterling.com/password-strength-indicator-and-generator/
+   $.widget("ui.user_password_strength",  {
+     _init: function() {
+       var self = this;
+       $(this.element).keyup(function() {
+	 var strength = self.calculateStrength (this.value);
+	 var index = Math.min(Math.floor( strength / 10 ), 10);
+         $("#g-password-gauge")
+           .removeAttr('class')
+	   .addClass( "g-password-strength0" )
+	   .addClass( self.options.classes[ index ] );
+       }).after("<div id='g-password-gauge' class='g-password-strength0'></div>");
+     },
+
+     calculateStrength: function(value) {
+       // Factor in the length of the password
+       var strength = Math.min(5, value.length) * 10 - 20;
+       // Factor in the number of numbers
+       strength += Math.min(3, value.length - value.replace(/[0-9]/g,"").length) * 10;
+       // Factor in the number of non word characters
+       strength += Math.min(3, value.length - value.replace(/\W/g,"").length) * 15;
+       // Factor in the number of Upper case letters
+       strength += Math.min(3, value.length - value.replace(/[A-Z]/g,"").length) * 10;
+
+       // Normalizxe between 0 and 100
+       return Math.max(0, Math.min(100, strength));
+     }
+   });
+   $.extend($.ui.user_password_strength,  {
+     defaults: {
+	classes : ['g-password-strength10', 'g-password-strength20', 'g-password-strength30',
+                   'g-password-strength40', 'g-password-strength50', 'g-password-strength60',
+                   'g-password-strength70',' g-password-strength80',' g-password-strength90',
+                   'g-password-strength100']
+     }
+   });
+ })(jQuery);