/*	dotmarketing formchecker created 03/05/02 by Ben Barreth*-------------------------------------------------------------*
	Altered 10/16/2002 by Will
	Incorporated Steve's util js functions.
	Reformatted for APS 3/17/09 by Joshua
	Added a DOM automatic form checker.  This works for 5+ browsers.  The checker iterates over all input boxes on the page and looks
	for an attribute called "required"  All you have to do is include the form_validation.js in your page:

	<SCRIPT LANGUAGE="JavaScript" TYPE="text/javascript" src='/js/form_validation.js'></SCRIPT>
	and put the "checkForm()" method in the doSubmit attribute in your form:

	<form name="myForm" action="/doSomthing" onSubmit="return checkForm();">
	Required can have three values (text | date | email).  The checker validates the field based on the required attribute.
	// requires the values fit the required style
	<input type="text" name="myFirstName" value="" required="text" />
	<input type="text" name="emailAddress" value="" required="email" />
	<input type="text" name="DOB" value="" required="date" />

	// requires the length to be 9
	<input type="text" name="myLastName" value="" required="text" pretty="My Last Name" requiredLength="9" />

	// require a radio button be checked
	<input type="radio" name="myGender" value="Male" required="radio" pretty="My Gender">
	<input type="radio" name="myGender" value="Female">

	// require 2 out of 4 checkboxes checked
	<input type="checkbox" name="favoriteFruit" value="Male" required="radio" pretty="My Gender" requiredNumber="2">
	<input type="checkbox" name="favoriteFruit" value="Apple">
	<input type="checkbox" name="favoriteFruit" value="Orange">
	<input type="checkbox" name="favoriteFruit" value="Female">

	// require at least one choice in a selectbox
	<select id="courseName" required="select" name="courseName">
	<option value=""</option>
	<option value="Content Manager">dotCMS Content Manager</option>
	<option value="Content Architect">dotCMS Content Architect</option>
	<option value="System Administrator">dotCMS System Administrator</option>
	<option value="Programmer Developer">dotCMS Programmer Developer</option>
	<option value="Reporting">dotCMS Reporting</option>
	</select>

	Feel free to add any other checks as you see fit.
*/

function checkForm(){
	inputs = document.getElementsByTagName("input");
	selects = document.getElementsByTagName("select");
	for(i =0; i<inputs.length ; i++){
		required = inputs[i].getAttribute("required");            
		if(required != undefined && required != "checkbox" && required != "radio"){
			fieldName = (inputs[i].getAttribute("pretty")!= undefined) ? inputs[i].getAttribute("pretty") : inputs[i].name;            requiredLength = (inputs[i].getAttribute("requiredLength")!= undefined) ? inputs[i].getAttribute("requiredLength") : 1;
			if(! lengthValid(inputs[i], requiredLength, fieldName)){
				return false;
				}
			if(required == "date" && ! dateValid(inputs[i], fieldName)){
				return false;
			}
			if(required == "email" && ! emailValid(inputs[i], fieldName)){
				return false;
			}
		}else if(required != undefined && required == "radio"){
			fieldName = inputs[i].name;
			prettyText = (inputs[i].getAttribute("pretty")!= undefined) ? inputs[i].getAttribute("pretty") : inputs[i].name;
			radios = eval("document." + inputs[i].form.name + "." + fieldName);
			radiosLength = radios.length;
			if(!radioValid(radios,radiosLength,prettyText)){
				return false;
			}
		}else if(required != undefined && required == "checkbox"){
			requiredNumber = (inputs[i].getAttribute("requiredNumber")!= undefined) ? inputs[i].getAttribute("requiredNumber") : 1;
			fieldName = inputs[i].name;
			prettyText = (inputs[i].getAttribute("pretty")!= undefined) ? inputs[i].getAttribute("pretty") : inputs[i].name;
			checkboxes = eval("document." + inputs[i].form.name + "." + fieldName);
			checkboxesLength = checkboxes.length;
			if(!checkboxValid(checkboxes,checkboxesLength,requiredNumber,prettyText)){
				return false;
			}
		}
	}
	for(i =0; i<selects.length ; i++){
		required = selects[i].getAttribute("required");
		if(required != undefined){
			fieldName = (selects[i].getAttribute("pretty")!= undefined) ? selects[i].getAttribute("pretty") : selects[i].name;
			if(required == "select" && ! selectValid(selects[i], fieldName)){
				return false;
			}
		}
	}
	return true;
}

//function to validate US dates
function dateValid(element, text){
	good = true;
	dar =element.value.split("/");
	if(dar.length < 3){
		good = false;
	}
	if(isNaN(parseInt(dar[0], 10)) || isNaN(parseInt(dar[1], 10)) || isNaN(parseInt(dar[2], 10))){
		good = false;
	}
	month = parseInt(dar[0], 10);
	day = parseInt(dar[1], 10);
	year = parseInt(dar[2], 10);
	if(month< 1 || month > 12){
		good = false;
	}
	else if(day < 1 || day > 31){
		good = false;
	}
	else if(year < 1900 || year > 2100){
		good = false;
	}
	else if((year % 4 != 0 && day > 28 && month == 2) || (month == 4 || month ==6 || month == 9 || month == 11) && day > 30     || (year % 4 == 0 && day > 29 && month == 2)){
		good = false;
	}
	if(! good){
		alert( text + " is a not a valid date");
		element.focus();
		return false;
	}
	return true;
}

//function to validate by length
function lengthValid(element, len, text) {
	text = Trim(text);
	if (element.value.length < len){
		alert("Please enter a valid " + text + ".");
		element.focus();
		return false;
	}else{
		return true;
	}
}

//function to validate select drop-downs
function selectValid(element, text) {
	text = Trim(text);
	if (element[0].selected){
		alert("Please select a " + text + ".");
		element.focus();
		return false;
	}else{
		return true;
	}
}

//function to validate numerical fields
function numberValid(element, text) {
	text = Trim(text);
	if (isNaN(element.value)){
		alert("Please enter a valid " + text + ".");
		element.focus();
		return false;
	}else{
		return true;
	}
}

//function to validate email
function emailValid(element, text) {
	text = Trim(text);
	good = true;
	if(element.value.length < 5) {
		good = false;
	}
	if(element.value.indexOf("@") < 1 || element.value.lastIndexOf("@")  > element.value.length - 3 ) {
		good = false;
	}
	if(element.value.indexOf(".") == -1 || element.value.lastIndexOf(".")  > element.value.length - 3 ) {
		good = false;
	}
	if(element.value.lastIndexOf("@") !=  element.value.indexOf("@") ) {
		good = false;
		}
	if(element.value.lastIndexOf("@") !=  element.value.indexOf("@") ) {
		good = false;
	}
	if(element.value.lastIndexOf("@") >= element.value.lastIndexOf(".")-1 ) {
		good = false;
	}
	if(!good){
		alert("Please enter a valid " + text + ".");
		element.focus();
		return false;
	}
	return true;
}

//function to validate at least 1 radio button is checked
function radioValid(element, radios, text) {
	text = Trim(text);
	radios=radios-1;
	var varChecked=false;
	for(var radiostoCheck=0;radiostoCheck<=radios;radiostoCheck++) {
		if(element[radiostoCheck].checked) {
			varChecked=true;
		}
	}
	if (varChecked==false) {
		alert("Please select " + text + ".");
		element[0].focus();
		return false;
	}else{
		return true;
	}
}

//function to validate at a given number of checkboxes are checked
function checkboxValid(element, checkboxesLength, requiredNumber,text) {
	text = Trim(text);
	checkboxesLength=checkboxesLength-1;
	var varChecked=0;
	for(var checkboxestoCheck=0;checkboxestoCheck<=checkboxesLength;checkboxestoCheck++) {
		if(element[checkboxestoCheck].checked) {
			varChecked++;
		}
	}
	if (varChecked < requiredNumber) {
		alert("Please select at least " + requiredNumber + " " + text + ".");
		element[0].focus();
		return false;
	}else{
		return true;
	}
}

//function to validate "other box" is not empty if checked
function otherboxValid(otherradio,otherfield,len,text) {
	text = Trim(text);
	if (otherradio.checked && (otherfield.value.length<len)) {
		alert("Please specify the " + text + ".");
		otherfield.focus();
		return false;
	}else{
		return true;
	}
}

//function to validate radio checked if checkbox checked
function checkboxRadio(checkfield, radiofield, radios, text) {
	text = Trim(text);
	if(checkfield.checked) {
		radioValid(radiofield, radios, text);
	}
}

/*==================================================================
LTrim(string) : Returns a copy of a string without leading spaces.
==================================================================*/
function LTrim(str) {
/*   PURPOSE: Remove leading blanks from our string.   IN: str - the string we want to LTrim*/
	var whitespace = new String(" \t\n\r");
	var s = new String(str);
	if (whitespace.indexOf(s.charAt(0)) != -1) {
		// We have a string with leading blank(s)...
		var j=0, i = s.length;
		// Iterate from the far left of string until we don't have any more whitespace...
		while (j < i && whitespace.indexOf(s.charAt(j)) != -1)
			j++;
		// Get the substring from the first non-whitespace character to the end of the string...
		s = s.substring(j, i);
	}
	return s;
}

/*==================================================================
RTrim(string) : Returns a copy of a string without trailing spaces.
==================================================================*/
function RTrim(str) {
/*   PURPOSE: Remove trailing blanks from our string.   IN: str - the string we want to RTrim*/
// We don't want to trip JUST spaces, but also tabs, line feeds, etc.  Add anything else you want to "trim" here in Whitespace
	var whitespace = new String(" \t\n\r");
	var s = new String(str);
	if (whitespace.indexOf(s.charAt(s.length-1)) != -1) {
		// We have a string with trailing blank(s)...
		var i = s.length - 1; // Get length of string
		// Iterate from the far right of string until we don't have any more whitespace...
		while (i >= 0 && whitespace.indexOf(s.charAt(i)) != -1)
			i--;
			// Get the substring from the front of the string to where the last non-whitespace character is...
		s = s.substring(0, i+1);
	}
	return s;
}

/*=============================================================
Trim(string) : Returns a copy of a string without leading or trailing spaces
=============================================================*/
function Trim(str){
	/*   PURPOSE: Remove trailing and leading blanks from our string.   IN: str - the string we want to Trim   RETVAL: A Trimmed string!*/
	return RTrim(LTrim(str));
}

/*=============================================================
Credit Card Returns a copy of a string without leading or trailing spaces
=============================================================*/
function isCreditCard(st) {
	if (st.length > 19) return (false);
	sum = 0; mul = 1; l = st.length;
	for (i = 0; i < l; i++) {
		digit = st.substring(l-i-1,l-i);
		tproduct = parseInt(digit ,10)*mul;
		if (tproduct >= 10) sum += (tproduct % 10) + 1;
		else sum += tproduct;
		if (mul == 1) mul++;
		else mul--;
	}
	if ((sum % 10) == 0) return (true);
	else return (false);
}
function isVisa(cc){
	if (((cc.length == 16) || (cc.length == 13)) && (cc.substring(0,1) == 4))
		return isCreditCard(cc);
	return false;
}
function isMasterCard(cc){
	firstdig = cc.substring(0,1);
	seconddig = cc.substring(1,2);
	if ((cc.length == 16) && (firstdig == 5) && ((seconddig >= 1) && (seconddig <= 5)))
		return isCreditCard(cc);
	return false;
}
function isAmericanExpress(cc){
	firstdig = cc.substring(0,1);
	seconddig = cc.substring(1,2);
	if ((cc.length == 15) && (firstdig == 3) && ((seconddig == 4) || (seconddig == 7)))
		return isCreditCard(cc);
	return false;
}
function isDiscover(cc){
	first4digs = cc.substring(0,4);
	if ((cc.length == 16) && (first4digs == "6011"))
		return isCreditCard(cc);
	return false;
}
function isCardMatch (cardType, cardNumber){
	cardType = cardType.toUpperCase();
	var doesMatch = true;
	if ((cardType == "VISA") && (!isVisa(cardNumber)))
		doesMatch = false;
	if ((cardType == "MASTER CARD") && (!isMasterCard(cardNumber)))
		doesMatch = false;
	if ((cardType == "AMERICAN EXPRESS") && (!isAmericanExpress(cardNumber)))
		doesMatch = false;
	if ((cardType == "DISCOVER") && (!isDiscover(cardNumber)))
		doesMatch = false;
	return doesMatch;
}