/**
 * 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.shortPass = 'Too short';
	$.fn.badPass = 'Weak';
	$.fn.goodPass = 'Good';
	$.fn.strongPass = 'Strong';
	$.fn.veryStrongPass = 'Very strong';
	$.fn.samePassword = 'Username and Password identical.';
	$.fn.resultStyle = "";
	
	 $.fn.passStrength = function(options) {  
	  
		 var defaults = {
				shortPass: 		"shortPass",			//optional
				badPass:		"badPass",				//optional
				goodPass:		"goodPass",				//optional
				strongPass:		"strongPass",			//optional
				veryStrongPass:		"veryStrongPass",	//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);
					var holder = $("#testholder_" + $(this).attr('name'));
					var resultStyle = $(this).resultStyle;
					var resultScore = $(this).resultScore ? $(this).resultScore : 0;
					
					if(opts.messageloc === 1)
					{
						holder.find("." + opts.baseStyle).remove();
						holder.append("<span class='"+opts.baseStyle+"'><span class='text'></span><span class='indicator'><span class='bar' style='width:"+resultScore+"%'></span></span></span>");
						holder.find("." + opts.baseStyle).addClass(resultStyle).find("span.text").text(results);
					}
					else
					{
						holder.find("." + opts.baseStyle).remove();
						holder.append("<span class='"+opts.baseStyle+"'><span class='text'></span><span class='indicator'><span class='bar' style='width:"+$resultScore+"%'></span></span></span>");
						holder.find("." + opts.baseStyle).addClass(resultStyle).find("span.text").text(results);
					}
				 });
				 
				//FUNCTIONS
				$.fn.teststrength = function(password,username,option){
						var score = 0;
						
						//password < 4
						if (password.length < 4 ) {
							this.resultScore = score;
							this.resultStyle =  option.shortPass;
							return $(this).shortPass;
						}
						
						//password == user name
						if (password.toLowerCase()==username.toLowerCase()) {
							this.resultScore = score;
							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;}
						
						this.resultScore = score;
						
						if (score < 34 ){
							this.resultStyle = option.badPass;
							return $(this).badPass;
						} 
						if (score < 68 ) {
							this.resultStyle = option.goodPass;
							return $(this).goodPass;
						}
						if (score < 85 ) {
							this.resultStyle = option.strongPass;
							return $(this).strongPass;
						}
						
					   this.resultStyle= option.veryStrongPass;
					   return $(this).veryStrongPass;
						
				};
		  
		  });  
	 };  
})(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;
	};