/*
**    Created by: Jeff Todnem (http://www.todnem.com/)
**    Created on: 2007-08-14
**    Last modified: 2010-05-03
**
**    License Information:
**    -------------------------------------------------------------------------
**    Copyright (C) 2007 Jeff Todnem
**
**    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 2 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.
**    
**    You should have received a copy of the GNU General Public License along
**    with this program; if not, write to the Free Software Foundation, Inc.,
**    59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
**    
*/

String.prototype.strReverse = function() {
    var newstring = "";
    for (var s=0; s < this.length; s++) {
        newstring = this.charAt(s) + newstring;
    }
    return newstring;
};

function chkPass(pwd) {
    // Simultaneous variable declaration and value assignment aren't supported in IE apparently
    // so I'm forced to assign the same value individually per var to support a crappy browser *sigh* 
    var nScore=0, nLength=0, nAlphaUC=0, nAlphaLC=0, nNumber=0, nSymbol=0, nMidChar=0, nRequirements=0, nAlphasOnly=0, nNumbersOnly=0, nUnqChar=0, nRepChar=0, nRepInc=0, nConsecAlphaUC=0, nConsecAlphaLC=0, nConsecNumber=0, nConsecSymbol=0, nConsecCharType=0, nSeqAlpha=0, nSeqNumber=0, nSeqSymbol=0, nSeqChar=0, nReqChar=0, nMultConsecCharType=0;
    var nMultRepChar=1, nMultConsecSymbol=1;
    var nMultMidChar=2, nMultRequirements=2, nMultConsecAlphaUC=2, nMultConsecAlphaLC=2, nMultConsecNumber=2;
    var nReqCharType=3, nMultAlphaUC=3, nMultAlphaLC=3, nMultSeqAlpha=3, nMultSeqNumber=3, nMultSeqSymbol=3;
    var nMultLength=4, nMultNumber=4;
    var nMultSymbol=6;
    var nTmpAlphaUC="", nTmpAlphaLC="", nTmpNumber="", nTmpSymbol="";
    var sAlphaUC="0", sAlphaLC="0", sNumber="0", sSymbol="0", sMidChar="0", sRequirements="0", sAlphasOnly="0", sNumbersOnly="0", sRepChar="0", sConsecAlphaUC="0", sConsecAlphaLC="0", sConsecNumber="0", sSeqAlpha="0", sSeqNumber="0", sSeqSymbol="0";
    var sAlphas = "abcdefghijklmnopqrstuvwxyz";
    var sNumerics = "01234567890";
    var sSymbols = ")!@#$%^&*()";
    var nMinPwdLen = 8;
    if (document.all) { var nd = 0; } else { var nd = 1; }
    if (pwd) {
        nScore = parseInt(pwd.length * nMultLength);
        nLength = pwd.length;
        var arrPwd = pwd.replace(/\s+/g,"").split(/\s*/);
        var arrPwdLen = arrPwd.length;
        
        /* Loop through password to check for Symbol, Numeric, Lowercase and Uppercase pattern matches */
        for (var a=0; a < arrPwdLen; a++) {
            if (arrPwd[a].match(/[A-Z]/g)) {
                if (nTmpAlphaUC !== "") { if ((nTmpAlphaUC + 1) == a) { nConsecAlphaUC++; nConsecCharType++; } }
                nTmpAlphaUC = a;
                nAlphaUC++;
            }
            else if (arrPwd[a].match(/[a-z]/g)) { 
                if (nTmpAlphaLC !== "") { if ((nTmpAlphaLC + 1) == a) { nConsecAlphaLC++; nConsecCharType++; } }
                nTmpAlphaLC = a;
                nAlphaLC++;
            }
            else if (arrPwd[a].match(/[0-9]/g)) { 
                if (a > 0 && a < (arrPwdLen - 1)) { nMidChar++; }
                if (nTmpNumber !== "") { if ((nTmpNumber + 1) == a) { nConsecNumber++; nConsecCharType++; } }
                nTmpNumber = a;
                nNumber++;
            }
            else if (arrPwd[a].match(/[^a-zA-Z0-9_]/g)) { 
                if (a > 0 && a < (arrPwdLen - 1)) { nMidChar++; }
                if (nTmpSymbol !== "") { if ((nTmpSymbol + 1) == a) { nConsecSymbol++; nConsecCharType++; } }
                nTmpSymbol = a;
                nSymbol++;
            }
            /* Internal loop through password to check for repeat characters */
            var bCharExists = false;
            for (var b=0; b < arrPwdLen; b++) {
                if (arrPwd[a] == arrPwd[b] && a != b) { /* repeat character exists */
                    bCharExists = true;
                    /* 
                    Calculate icrement deduction based on proximity to identical characters
                    Deduction is incremented each time a new match is discovered
                    Deduction amount is based on total password length divided by the
                    difference of distance between currently selected match
                    */
                    nRepInc += Math.abs(arrPwdLen/(b-a));
                }
            }
            if (bCharExists) { 
                nRepChar++; 
                nUnqChar = arrPwdLen-nRepChar;
                nRepInc = (nUnqChar) ? Math.ceil(nRepInc/nUnqChar) : Math.ceil(nRepInc); 
            }
        }
        
        /* Check for sequential alpha string patterns (forward and reverse) */
        for (var s=0; s < 23; s++) {
            var sFwd = sAlphas.substring(s,parseInt(s+3));
            var sRev = sFwd.strReverse();
            if (pwd.toLowerCase().indexOf(sFwd) != -1 || pwd.toLowerCase().indexOf(sRev) != -1) { nSeqAlpha++; nSeqChar++;}
        }
        
        /* Check for sequential numeric string patterns (forward and reverse) */
        for (var s=0; s < 8; s++) {
            var sFwd = sNumerics.substring(s,parseInt(s+3));
            var sRev = sFwd.strReverse();
            if (pwd.toLowerCase().indexOf(sFwd) != -1 || pwd.toLowerCase().indexOf(sRev) != -1) { nSeqNumber++; nSeqChar++;}
        }
        
        /* Check for sequential symbol string patterns (forward and reverse) */
        for (var s=0; s < 8; s++) {
            var sFwd = sSymbols.substring(s,parseInt(s+3));
            var sRev = sFwd.strReverse();
            if (pwd.toLowerCase().indexOf(sFwd) != -1 || pwd.toLowerCase().indexOf(sRev) != -1) { nSeqSymbol++; nSeqChar++;}
        }
        
    /* Modify overall score value based on usage vs requirements */

        /* General point assignment */
        if (nAlphaUC > 0 && nAlphaUC < nLength) {    
            nScore = parseInt(nScore + ((nLength - nAlphaUC) * 2));
            sAlphaUC = "+ " + parseInt((nLength - nAlphaUC) * 2); 
        }
        if (nAlphaLC > 0 && nAlphaLC < nLength) {    
            nScore = parseInt(nScore + ((nLength - nAlphaLC) * 2)); 
            sAlphaLC = "+ " + parseInt((nLength - nAlphaLC) * 2);
        }
        if (nNumber > 0 && nNumber < nLength) {    
            nScore = parseInt(nScore + (nNumber * nMultNumber));
            sNumber = "+ " + parseInt(nNumber * nMultNumber);
        }
        if (nSymbol > 0) {    
            nScore = parseInt(nScore + (nSymbol * nMultSymbol));
            sSymbol = "+ " + parseInt(nSymbol * nMultSymbol);
        }
        if (nMidChar > 0) {    
            nScore = parseInt(nScore + (nMidChar * nMultMidChar));
            sMidChar = "+ " + parseInt(nMidChar * nMultMidChar);
        }
        
        /* Point deductions for poor practices */
        if ((nAlphaLC > 0 || nAlphaUC > 0) && nSymbol === 0 && nNumber === 0) {  // Only Letters
            nScore = parseInt(nScore - nLength);
            nAlphasOnly = nLength;
            sAlphasOnly = "- " + nLength;
        }
        if (nAlphaLC === 0 && nAlphaUC === 0 && nSymbol === 0 && nNumber > 0) {  // Only Numbers
            nScore = parseInt(nScore - nLength); 
            nNumbersOnly = nLength;
            sNumbersOnly = "- " + nLength;
        }
        if (nRepChar > 0) {  // Same character exists more than once
            nScore = parseInt(nScore - nRepInc);
            sRepChar = "- " + nRepInc;
        }
        if (nConsecAlphaUC > 0) {  // Consecutive Uppercase Letters exist
            nScore = parseInt(nScore - (nConsecAlphaUC * nMultConsecAlphaUC)); 
            sConsecAlphaUC = "- " + parseInt(nConsecAlphaUC * nMultConsecAlphaUC);
        }
        if (nConsecAlphaLC > 0) {  // Consecutive Lowercase Letters exist
            nScore = parseInt(nScore - (nConsecAlphaLC * nMultConsecAlphaLC)); 
            sConsecAlphaLC = "- " + parseInt(nConsecAlphaLC * nMultConsecAlphaLC);
        }
        if (nConsecNumber > 0) {  // Consecutive Numbers exist
            nScore = parseInt(nScore - (nConsecNumber * nMultConsecNumber));  
            sConsecNumber = "- " + parseInt(nConsecNumber * nMultConsecNumber);
        }
        if (nSeqAlpha > 0) {  // Sequential alpha strings exist (3 characters or more)
            nScore = parseInt(nScore - (nSeqAlpha * nMultSeqAlpha)); 
            sSeqAlpha = "- " + parseInt(nSeqAlpha * nMultSeqAlpha);
        }
        if (nSeqNumber > 0) {  // Sequential numeric strings exist (3 characters or more)
            nScore = parseInt(nScore - (nSeqNumber * nMultSeqNumber)); 
            sSeqNumber = "- " + parseInt(nSeqNumber * nMultSeqNumber);
        }
        if (nSeqSymbol > 0) {  // Sequential symbol strings exist (3 characters or more)
            nScore = parseInt(nScore - (nSeqSymbol * nMultSeqSymbol)); 
            sSeqSymbol = "- " + parseInt(nSeqSymbol * nMultSeqSymbol);
        }
        
        /* Determine if mandatory requirements have been met and set image indicators accordingly */
        var arrChars = [nLength,nAlphaUC,nAlphaLC,nNumber,nSymbol];
        var arrCharsIds = ["nLength","nAlphaUC","nAlphaLC","nNumber","nSymbol"];
        var arrCharsLen = arrChars.length;
        for (var c=0; c < arrCharsLen; c++) {
            if (arrCharsIds[c] == "nLength") { var minVal = parseInt(nMinPwdLen - 1); } else { var minVal = 0; }
            if (arrChars[c] == parseInt(minVal + 1)) { nReqChar++ }
            else if (arrChars[c] > parseInt(minVal + 1)) { nReqChar++; }
        }

        nRequirements = nReqChar;
        if (pwd.length >= nMinPwdLen) { var nMinReqChars = 3; } else { var nMinReqChars = 4; }
        if (nRequirements > nMinReqChars) {  // One or more required characters exist
            nScore = parseInt(nScore + (nRequirements * 2)); 
            sRequirements = "+ " + parseInt(nRequirements * 2);
        }
        
        /* Display updated score criteria to client */
        if (nScore > 100) { nScore = 100; } else if (nScore < 0) { nScore = 0; }
        $("#scorebar").css("width", parseInt(nScore) + "px");
        if (nScore > 0) {
            $("#scorebar").css("display", "");
        } else {
            $("#scorebar").css("display", "none");
        }
    }
    else {
        /* Display default score criteria to client */
        initPwdChk();
    }
}

function initPwdChk() {
    /* Reset all form values to their default */
    $("#scorebar").css("width", "0px");
    $("#scorebar").css("display", "none");
}

$(document).ready(function() {
    /* Init the password checking */
    $("#pass").keyup(function() {
        chkPass(this.value);
    });
    $("#scorebar").wrap('<div id="scorebardiv" />');
    initPwdChk();
});