/**
 * 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 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.nonePass = ''
	$.fn.shortPass = '' //'Too short';
	$.fn.badPass = '' // 'Weak';
	$.fn.goodPass = '' // 'Good';
	$.fn.strongPass = '' // 'Strong';
	$.fn.samePassword = 'Username and Password identical.';
	$.fn.resultStyle = "";
	
	$.fn.passStrength = function(options) {  
	  
		var defaults = {
			nonePass:		"nonePass",		//optional
			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);
			var meter = $(".password_meter");

            meter.next("." + opts.baseStyle).remove();
            meter.after("<span class=\""+opts.baseStyle+" "+opts.nonePass+"\"/>");
					 		
		 	$(obj).unbind().keyup(function() {
		 		$.fn.displayspan();
		 	});
		 	
		 	$.fn.displayspan = function(){
				var results = $.fn.teststrength(obj.val(),$(opts.userid).val(),opts);
				
                meter.next("." + opts.baseStyle).remove();
                meter.after("<span class=\""+opts.baseStyle+" "+obj.resultStyle+"\"/>");
		 	};
		 		 
		 	//FUNCTIONS
		 	$.fn.teststrength = function(password,username,option){
		 		var score = 0; 

		 		//password = 0
		 		if (password == null || password.length == 0) { this.resultStyle = option.nonePass; return $(this).nonePass;}
		 			    
		 		//password < 5
		 		if (password.length < 5 ) { 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;
	};