/**
 * password_strength_plugin.js
 * Copyright (c) 20010 myPocket technologies (www.mypocket-technologies.com)
 

 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:

 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 * 
 * @author Darren Mason (djmason9@gmail.com)
 * @date 3/13/2009
 * @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 1.0.1
 * 
 * @requires jquery.js (tested with 1.3.2)
 * @param shortPass:    "shortPass",    //optional
 * @param badPass:      "badPass",      //optional
 * @param goodPass:     "goodPass",     //optional
 * @param strongPass:   "strongPass",   //optional
 * @param baseStyle:    "testresult",   //optional
 * @param userid:       "",             //required override
 * @param messageloc:   1               //before == 0 or after == 1
 * 
*/

(function($){ 
    $.fn.shortPass = eval("\"Too short\"");
    $.fn.badPass = eval("\"Weak\"");
    $.fn.goodPass = eval("\"Good\"");
    $.fn.strongPass = eval("\"Strong\"");
    $.fn.samePassword = eval("\"Username and Password identical.\"");
    $.fn.resultStyle = "";
    
     $.fn.passStrength = function(options) {  
      
         var defaults = {
                shortPass:      "shortPass",    //optional
                badPass:        "badPass",      //optional
                goodPass:       "goodPass",     //optional
                strongPass:     "strongPass",   //optional
                baseStyle:      "testresult",   //optional
                userid:         "",             //required override
                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);
                    }
                 });
                 
                //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.badPass;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;
    };