/**
 * password_strength_plugin.js
 * Copyright (c) 2009 myPocket technologies (www.mypocket-technologies.com)
 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.

 * View the GNU General Public License <http://www.gnu.org/licenses/>.

 * @author Darren Mason (djmason9@gmail.com)
 * @date 1/23/2009
 * @projectDescription Password Strength Meter is a jQuery plug-in provide you smart algorithm to detect a password strength. Based on Firas Kassem orginal plugin - http://phiras.wordpress.com/2007/04/08/password-strength-meter-a-jquery-plugin/
 * @version 1.0.0
 * 
 * @requires jquery.js (tested with 1.3.1)
 * @param shortPass:	"shortPass",	//optional
 * @param badPass:		"badPass",		//optional
 * @param goodPass:		"goodPass",		//optional
 * @param strongPass:	"strongPass",	//optional
 * @param samePass:		"samePass",		//optional
 * @param baseStyle:	"testresult",	//optional
 * @param userid:		"",				//required override
 * @param statusid:     "",             //optional - field to store status of password
 * @param messageloc:	1				//before == 0 or after == 1
 * 
*/

(function($){ 
    $.fn.shortPass = 'Too short';
    $.fn.badPass = 'Weak';
    $.fn.goodPass = 'Good';
    $.fn.strongPass = 'Strong';
    $.fn.samePassword = 'Same as Email';
    $.fn.resultStyle = "";
	
    $.fn.passStrength = function(options) {
	  
        var defaults = {
            shortPass: 		"shortPass",	//optional
            badPass:		"badPass",		//optional
            goodPass:		"goodPass",		//optional
            strongPass:		"strongPass",	//optional
            samePass:		"samePass",     //optional
            baseStyle:		"testresult",	//optional
            userid:			"",				//required override
            statusid:       "",             //optional - field to store status of password
            messageloc:		1				//before == 0 or after == 1
        };
        var opts = $.extend(defaults, options);
		      
        return this.each(function() {
            var obj = $(this);
		 		
            $(obj).unbind().keyup(function()
            {
					
                var results = $.fn.teststrength($(this).val(),$(opts.userid).val(),opts);
					
                if(opts.messageloc === 1)
                {
                    $(this).next("." + opts.baseStyle).remove();
                    $(this).after("<span class=\""+opts.baseStyle+"\"><span></span></span>");
                    $(this).next("." + opts.baseStyle).addClass($(this).resultStyle).find("span").text(results);
                }
                else
                {
                    $(this).prev("." + opts.baseStyle).remove();
                    $(this).before("<span class=\""+opts.baseStyle+"\"><span></span></span>");
                    $(this).prev("." + opts.baseStyle).addClass($(this).resultStyle).find("span").text(results);
                }
                $(opts.statusid).val($(this).resultStyle);
            });
		 		 
            //FUNCTIONS
            $.fn.teststrength = function(password,username,option){
                var score = 0;
		 			    
                //password < 4
                if (password.length < 4 ) {
                    this.resultStyle =  option.shortPass;return $(this).shortPass;
                }
		 			    
                //password == user name
                if (password.toLowerCase()==username.toLowerCase()){
                    this.resultStyle = option.samePass;return $(this).samePassword;
                }
		 			    
                //password length
                score += password.length * 4;
                score += ( $.fn.checkRepetition(1,password).length - password.length ) * 1;
                score += ( $.fn.checkRepetition(2,password).length - password.length ) * 1;
                score += ( $.fn.checkRepetition(3,password).length - password.length ) * 1;
                score += ( $.fn.checkRepetition(4,password).length - password.length ) * 1;
		 	
                //password has 3 numbers
                if (password.match(/(.*[0-9].*[0-9].*[0-9])/)){
                    score += 5;
                }
		 			    
                //password has 2 symbols
                if (password.match(/(.*[!,@,#,$,%,^,&,*,?,_,~].*[!,@,#,$,%,^,&,*,?,_,~])/)){
                    score += 5 ;
                }
		 			    
                //password has Upper and Lower chars
                if (password.match(/([a-z].*[A-Z])|([A-Z].*[a-z])/)){
                    score += 10;
                }
		 			    
                //password has number and chars
                if (password.match(/([a-zA-Z])/) && password.match(/([0-9])/)){
                    score += 15;
                }
                //
                //password has number and symbol
                if (password.match(/([!,@,#,$,%,^,&,*,?,_,~])/) && password.match(/([0-9])/)){
                    score += 15;
                }
		 			    
                //password has char and symbol
                if (password.match(/([!,@,#,$,%,^,&,*,?,_,~])/) && password.match(/([a-zA-Z])/)){
                    score += 15;
                }
		 			    
                //password is just a numbers or chars
                if (password.match(/^\w+$/) || password.match(/^\d+$/) ){
                    score -= 10;
                }
		 			    
                //verifying 0 < score < 100
                if ( score < 0 ){
                    score = 0;
                }
                if ( score > 100 ){
                    score = 100;
                }
		 			    
                if (score < 34 ){
                    this.resultStyle = option.badPass; return $(this).badPass;
                }
                if (score < 68 ){
                    this.resultStyle = option.goodPass;return $(this).goodPass;
                }
		 			    
                this.resultStyle= option.strongPass;
                return $(this).strongPass;
		 			    
            };
		  
        });
    };
})(jQuery); 


$.fn.checkRepetition = function(pLen,str) {
    var res = "";
    for (var i=0; i<str.length ; i++ )
    {
        var repeated=true;
         
        for (var j=0;j < pLen && (j+i+pLen) < str.length;j++){
            repeated=repeated && (str.charAt(j+i)==str.charAt(j+i+pLen));
        }
        if (j<pLen){
            repeated=false;
        }
        if (repeated) {
            i+=pLen-1;
            repeated=false;
        }
        else {
            res+=str.charAt(i);
        }
    }
    return res;
};