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(function($) {
// Based on the Password Strength Indictor By Benjamin Sterling
// http://benjaminsterling.com/password-strength-indicator-and-generator/
$.widget("ui.user_password_strength", {
options: {
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']
},
_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;
// Normalize between 0 and 100
return Math.max(0, Math.min(100, strength));
}
});
})(jQuery);
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