// Password strength meter v2.0
// Matthew R. Miller - 2007
// www.codeandcoffee.com
// Based off of code from:
//  http://www.intelligent-web.co.uk
//  http://www.geekwisdom.com/dyn/passwdmeter

/*
	Password Text Range:
	
		>= 90: Very Secure
		>= 80: Secure
		>= 70: Very Strong
		>= 60: Strong
		>= 50: Average
		>= 25: Weak
		>= 0: Very Weak	
*/


// Settings
// -- Toggle to true or false, if you want to change what is checked in the password
var m_strUpperCase = "ABCDEFGHJKLMNOPQRSTUVWXZ";
var m_strLowerCase = "abcdefghjklmnopqrstuvwxz";
var m_strNumber = "0123456789";
var m_strCharacters = "!@#$%^&*?_~<>";

// Check password
function checkPassword(strPassword)
{
	// Reset combination count
	var nScore = 0;
	
	// Password length
	// -- Less than 4 characters
	if (strPassword.length < 5)
	{
		nScore += 5;
	}
	// -- 5 to 7 characters
	else if (strPassword.length > 4 && strPassword.length < 8)
	{
		nScore += 10;
	}
	// -- 8 or more
	else if (strPassword.length > 7)
	{
		nScore += 25;
	}

	// Letters
	var nUpperCount = countContain(strPassword, m_strUpperCase);
	var nLowerCount = countContain(strPassword, m_strLowerCase);
	var nLowerUpperCount = nUpperCount + nLowerCount;
	// -- Letters are all lower case
	if (nUpperCount == 0 && nLowerCount != 0) 
	{ 
		nScore += 10; 
	}
	// -- Letters are upper case and lower case
	else if (nUpperCount != 0 && nLowerCount != 0) 
	{ 
		nScore += 20; 
	}
	
	// Numbers
	var nNumberCount = countContain(strPassword, m_strNumber);
	// -- 1 number
	if (nNumberCount == 1)
	{
		nScore += 15;
	}
	// -- 2 or more numbers
	if (nNumberCount >= 2)
	{
		nScore += 20;
	}
	
	// Characters
	var nCharacterCount = countContain(strPassword, m_strCharacters);
	// -- 1 character
	if (nCharacterCount == 1)
	{
		nScore += 15;
	}	
	// -- More than 1 character
	if (nCharacterCount > 1)
	{
		nScore += 30;
	}
	
	// Bonus
	// -- Letters and ( numbers or characters )
	if (nNumberCount != 0 && (nLowerUpperCount != 0 || nCharacterCount != 0))
	{
		nScore += 10;
	}
	// -- Letters, numbers, and characters
	if (nNumberCount != 0 && nLowerUpperCount != 0 && nCharacterCount != 0)
	{
		nScore += 15;
	}
	// -- Mixed case letters, numbers, and characters
	if (nNumberCount != 0 && nUpperCount != 0 && nLowerCount != 0 && nCharacterCount != 0)
	{
		nScore += 20;
	}
	
	if (nScore > 100)
	{
		nScore = 100;
	}
	return nScore;
}

// Runs password through check and then updates GUI 
function runPassword(strPassword, verySafe, safe, veryStrong, strong, medium, weak, veryWeak)
{
	 // Get controls
	var passwdHolderSpan =  jQuery.noConflict()('#passwdHolder');
	
	if (passwdHolderSpan == null)
	{
		return;
	}
	
	// Check password
	var nScore = checkPassword(strPassword);
    
 	if (nScore >= 90)
 	{
 		var strText = verySafe;
 		var barResult = "veryStrongPwd";
 	}
 	// -- Secure
 	else if (nScore >= 75)
 	{
 		var strText = safe;
 		var barResult = "veryStrongPwd";
	}
	// -- Very Strong
 	else if (nScore >= 70)
 	{
 		var strText = veryStrong;
 		var barResult = "strongPwd";
	}
	// -- Strong
 	else if (nScore >= 60)
 	{
 		var strText = strong;
 		var barResult = "strongPwd";
	}
	// -- Average
 	else if (nScore >= 50)
 	{
 		var strText = medium;
 		var barResult = "lowPwd";
	}
	// -- Weak
 	else if (nScore >= 25)
 	{
 		var strText = weak; 		
 		var barResult = "lowPwd";
	}
	// -- Very Weak
 	else
 	{
 		var strText = veryWeak;
 		var barResult = "lowPwd";
	}
	
	passwdHolderSpan.html("<span class=\"passwdMeter "+ barResult+"\">"+strText+"</span>");
}
 
// Checks a string for a list of characters
function countContain(strPassword, strCheck)
{ 
	// Declare variables
	var nCount = 0;
	
	for (i = 0; i < strPassword.length; i++) 
	{
		if (strCheck.indexOf(strPassword.charAt(i)) > -1) 
		{ 
	        	nCount++;
		} 
	} 
 
	return nCount; 
}