// 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 Strength Algorithm:

        Password Length:
                5 Points: Less than 4 characters
                10 Points: 5 to 7 characters
                25 Points: 8 or more

        Letters:
                0 Points: No letters
                10 Points: Letters are all lower case
                20 Points: Letters are upper case and lower case

        Numbers:
                0 Points: No numbers
                10 Points: 1 number
                20 Points: 3 or more numbers

        Characters:
                0 Points: No characters
                10 Points: 1 character
                25 Points: More than 1 character

        Bonus:
                2 Points: Letters and numbers
                3 Points: Letters, numbers, and characters
                5 Points: Mixed case letters, numbers, and characters

        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 = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
var m_strLowerCase = "abcdefghijklmnopqrstuvwxyz";
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 += 10;
        }
        // -- 3 or more numbers
        if (nNumberCount >= 3)
        {
                nScore += 20;
        }

        // Characters
        var nCharacterCount = countContain(strPassword, m_strCharacters);
        // -- 1 character
        if (nCharacterCount == 1)
        {
                nScore += 10;
        }
        // -- More than 1 character
        if (nCharacterCount > 1)
        {
                nScore += 25;
        }

        // Bonus
        // -- Letters and numbers
        if (nNumberCount != 0 && nLowerUpperCount != 0)
        {
                nScore += 2;
        }
        // -- Letters, numbers, and characters
        if (nNumberCount != 0 && nLowerUpperCount != 0 && nCharacterCount != 0)
        {
                nScore += 3;
        }
        // -- Mixed case letters, numbers, and characters
        if (nNumberCount != 0 && nUpperCount != 0 && nLowerCount != 0 && nCharacterCount != 0)
        {
                nScore += 5;
        }


        return nScore;
}

// Runs password through check and then updates GUI
function runPassword(strPassword, strFieldID)
{
        // Check password
        var nScore = checkPassword(strPassword);

         // Get controls
            var ctlBar = document.getElementById(strFieldID + "_bar");
            var ctlText = document.getElementById(strFieldID + "_text");
            if (!ctlBar || !ctlText)
                    return;

            // Set new width
            ctlBar.style.width = nScore + "%";

         // Color and text
        // -- Безупречный
         if (nScore >= 90)
         {
                 var strText = "Отличный пароль";
                 var strColor = "#0ca908";
         }
         // -- Очень хороший
         else if (nScore >= 80)
         {
                 var strText = "Очень хороший";
                 vstrColor = "#7ff67c";
        }
        // -- Хороший
         else if (nScore >= 70)
         {
                 var strText = "Хороший";
                 var strColor = "#1740ef";
        }
        // -- Давольно нормальный
         else if (nScore >= 60)
         {
                 var strText = "Достаточно неплохой";
                 var strColor = "#5a74e3";
        }
        // -- Нормальный
         else if (nScore >= 50)
         {
                 var strText = "Нормальный";
                 var strColor = "#e3cb00";
        }
        // -- Слабый
         else if (nScore >= 25)
         {
                 var strText = "Слабенько";
                 var strColor = "#e7d61a";
        }
        // -- Очень плохой
         else
         {
                 var strText = "Ужас";
                 var strColor = "#e71a1a";
        }
        ctlBar.style.backgroundColor = strColor;
        ctlText.innerHTML = "<span style='color: " + strColor + ";'>" + strText + " - " + nScore + "</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;
}