/*
* this script is used to validate javascript forms
* the var defaultLocation is not only to translate messages. but to translate date formats too.
* use "datatype" to set the type of the data. Datatypes allowed are:
* email|integer|url|date|time|float|string. check if the method you need is already implemented, because not all is done yet
* use "required" to display a popup window with the message or
* use "errorobj" to turn a obj described on errorobj who should be displayed visible
* use "condition" giving a group of conditions separated by | containing one operator and one rightSide statement Eg:
* condition="eq #password|ne 1234" mean that this field should be equals to #password field (field with id="password") and must not be "1234"
* allowed operators: eq|ne
*
* futurely we'll be able to use ajaxcheck="checknickname.php"
* and ajaxmessage="This email is already in use"
*/
	var defaultLocation = "USA";	// "USA|BR";
	var dtCh= "/";
	var minYear=1900;
	var maxYear=2100;
	
	var ajaxValidation;
	var ajaxResponse = false;
	//var publicObjectIdValidation;

	function formatInteger(input){
		var re = /[^0-9]/g
		input = input.replace(re,"");
		return(input);
	}

	function formatFloat(input){
		if (defaultLocation.toUpperCase() == 'USA'){
			var re1 = /[,]/g
			var re2 = /[^0-9\.]/g
			var replaceTo = ".";
		} else if (defaultLocation.toUpperCase() == 'BR'){
			var re1 = /[\.]/g
			var re2 = /[^0-9,]/g
			var replaceTo = ",";
		}

		input = input.replace(re1,replaceTo);
		input = input.replace(re2,"");

		return(input);
	}

	function strToDate(str,separator){

		var date = str.split("/");
		if (!separator) separator = '';

		if (defaultLocation.toUpperCase() == 'USA'){
			var year = date[2];
			var month = date[0];
			var day = date[1];
		} else if (defaultLocation.toUpperCase() == 'BR'){
			var year = date[2];
			var month = date[1];
			var day = date[0];
		}

		if (month.length < 2) month = "0"+month;
		if (day.length < 2) day = "0"+day;
		
		return year+separator+month+separator+day;
		
		alert("Default location not identified");
		return false;
	}

	function generateFormError(message,errorObj,node){
		
		/*if (defaultLocation.toUpperCase() == 'USA'){
			if (message == '') message = 'Requited Field';
		} else if (defaultLocation.toUpperCase() == 'BR'){
			if (message == '') message = 'Campo Obrigatorio';
		}
		*/

		if (errorObj){
			document.getElementById(errorObj).style.visibility="visible";
		} else if (message) {
			alert(message);	
		} else {
			if (defaultLocation.toUpperCase() == 'USA'){
				alert("Required Field");	
			} else if (defaultLocation.toUpperCase() == 'BR'){
				alert("Campo Obrigatorio");
			}
		}

		node.focus();
		return false;
	}


	function isInteger(s){
		var i;
		for (i = 0; i < s.length; i++){
			// Check that current character is number.
			var c = s.charAt(i);
			if (((c < "0") || (c > "9"))) return false;
		}
		// All characters are numbers.
		return true;
	}

	function stripCharsInBag(s, bag){
		var i;
		var returnString = "";
		// Search through string's characters one by one.
		// If character is not in bag, append to returnString.
		for (i = 0; i < s.length; i++){
			var c = s.charAt(i);
			if (bag.indexOf(c) == -1) returnString += c;
		}
		return returnString;
	}

	function daysInFebruary (year){
		// February has 29 days in any year evenly divisible by four,
		// EXCEPT for centurial years which are not also divisible by 400.
		return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
	}

	function DaysArray(n) {
		for (var i = 1; i <= n; i++) {
			this[i] = 31
			if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
			if (i==2) {this[i] = 29}
	   }
	   return this
	}

	function isDateEn(dtStr){
		var daysInMonth = DaysArray(12)
		var pos1=dtStr.indexOf(dtCh)
		var pos2=dtStr.indexOf(dtCh,pos1+1)
		var strMonth=dtStr.substring(0,pos1)
		var strDay=dtStr.substring(pos1+1,pos2)
		var strYear=dtStr.substring(pos2+1)
		strYr=strYear
		if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
		if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
		for (var i = 1; i <= 3; i++) {
			if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
		}
		month=parseInt(strMonth)
		day=parseInt(strDay)
		year=parseInt(strYr)
		if (pos1==-1 || pos2==-1){
			//alert("The date format should be : mm/dd/yyyy")
			return false
		}
		if (strMonth.length<1 || month<1 || month>12){
			//alert("Please enter a valid month")
			return false
		}
		if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
			//alert("Please enter a valid day")
			return false
		}
		if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
			//alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
			return false
		}
		if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
			//alert("Please enter a valid date")
			return false
		}
		return true
	}

	function isDate(data) {
		if (defaultLocation.toUpperCase() == 'USA'){
			return isDateEn(data);
		} else if (defaultLocation.toUpperCase() == 'BR'){
			return data.match(/^((0?[1-9]|[12]\d)\/(0?[1-9]|1[0-2])|30\/(0?[13-9]|1[0-2])|31\/(0?[13578]|1[02]))\/(19|20)\d{2}$/);
		} else {
			alert("Location not defined");
			return false;
		}
	}

	function emailIsValid(entrada){
		return(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{1,3})+$/.test(entrada));
	}

	function validaURL(obj){
		var url = obj.value;
		//var RegExp = /^(([\w]+:)?\/\/)?(([\d\w]|%[a-fA-f\d]{2,2})+(:([\d\w]|%[a-fA-f\d]{2,2})+)?@)?([\d\w][-\d\w]{0,253}[\d\w]\.)+[\w]{2,4}(:[\d]+)?(\/([-+_~.\d\w]|%[a-fA-f\d]{2,2})*)*(\?(&?([-+_~.\d\w]|%[a-fA-f\d]{2,2})=?)*)?(#([-+_~.\d\w]|%[a-fA-f\d]{2,2})*)?$/;
		var RegExp = /^(http:\/\/)(([\d\w]|%[a-fA-f\d]{2,2})+(:([\d\w]|%[a-fA-f\d]{2,2})+)?@)?([\d\w][-\d\w]{0,253}[\d\w]\.)+[\w]{2,4}(:[\d]+)?(\/([-+_~.\d\w]|%[a-fA-f\d]{2,2})*)*(\?(&?([-+_~.\d\w]|%[a-fA-f\d]{2,2})=?)*)?(#([-+_~.\d\w]|%[a-fA-f\d]{2,2})*)?$/;
		return RegExp.test(url);

		//var RegExp = /^http:\/\/(([\w]+:)?\/\/)?(([\d\w]|%[a-fA-f\d]{2,2})+(:([\d\w]|%[a-fA-f\d]{2,2})+)?@)?([\d\w][-\d\w]{0,253}[\d\w]\.)+[\w]{2,4}(:[\d]+)?(\/([-+_~.\d\w]|%[a-fA-f\d]{2,2})*)*(\?(&?([-+_~.\d\w]|%[a-fA-f\d]{2,2})=?)*)?(#([-+_~.\d\w]|%[a-fA-f\d]{2,2})*)?$/;
		//return RegExp.test(url);
	}

	// work on a function to consider mandatory conditional field
	// work on a function to consider a xor mandatory field, where it's mandatory just one of both. not either and not neither (like exclusive or (xor) 

	function pause(millis){
		
		if (millis){
			setTimeout("pause(false)",millis);
		}
		/*
		var date = new Date();
		var curDate = null;
		do { curDate = new Date(); }
		while(curDate-date < millis);
		*/
	}


	function ajaxCheckValidation(ajaxPage,data){
		
		if (window.ActiveXObject){
			ajaxValidation = new ActiveXObject("Microsoft.XMLHTTP");
		} else if (window.XMLHttpRequest){
			ajaxValidation = new XMLHttpRequest();
		}
		
		ajaxValidation.onreadystatechange = handleAjaxStateValidation;
		if (ajaxPage.indexOf("?") !== -1){
			ajaxPage += "&data="+data;
		} else {
			ajaxPage += "?data="+data;
		}
		
		//alert(ajaxPage);
		ajaxValidation.open("GET",ajaxPage,true);
		ajaxValidation.send(null);
		
		// wait response
		while (!ajaxResponse) {
			pause(1000);
			//alert(ajaxResponse);
			document.getElementById('feedback').innerHTML = document.getElementById('feedback').innerHTML + "|";
		}
		
		switch(ajaxResponse.toUpperCase()){
			case "OK": case "TRUE": case "1": case "YES":
				return true;
			case "ERROR": case "FALSE": case "0": case "NO":
				return false;
		}
		
		return false;
	}
	
	function handleAjaxStateValidation(){
		switch (ajaxValidation.readyState){
			case 1: // loading
			case 2: // loaded
			case 3: // interactive
			case 4: // done
				//alert("done");
				if (ajaxValidation.status == 200){
					ajaxResponse = ajaxValidation.responseText;
				} else {
					ajaxResponse = "error:"+ajaxValidation.status;
				}
			break;
		}
	}


	function formIsValid(form){
		var dataTypes = Array("integer","string","email","date","time","float","phone");
		var datatype;
		var elem;
		// require
		// datatype

		for (var cont = 0; cont < form.elements.length; cont++){
			elem = form.elements[cont];

			//datatype = form.fields[cont].datatype;
			datatype = elem.getAttribute('datatype');
			//message = form.fields[cont].required;
			message = elem.getAttribute('required');
			errorObj = elem.getAttribute('errorobj');
			condition = elem.getAttribute('condition');
			ajaxcheck = elem.getAttribute('ajaxcheck');
			ajaxmessage = elem.getAttribute('ajaxmessage');
			ereg = elem.getAttribute('ereg');
			//alert(cont+" "+form.elements[cont].name+" "+message);

			if ((message == '' || !message) && (errorObj == '' || !errorObj)) continue;
			
			if (errorObj) {
				document.getElementById(errorObj).style.visibility="hidden";
			}
			
			// regular expressions validation
			if (ereg) if (!elem.value.match(ereg))	return generateFormError(message,errorObj,elem);
			
			//alert(message);
			// special conditions
			if (condition) {
				var conditions = condition.split("|");
				for (cont2 = 0; cont2 < conditions.length; cont2++){
					var currentCondition = conditions[cont2];
					currentCondition = currentCondition.split(" ");
					var operator = currentCondition[0];
					var rightSide = currentCondition[1];
					
					if (rightSide.charAt(0) == "#") {
						rightSide = rightSide.substr(1);
						rightSide = document.getElementById(rightSide).value;
					}
					
					switch(operator){
						// eq = equal | ne = not equal
						case "eq": if (elem.value !== rightSide) return generateFormError(message,errorObj,elem); break;
						case "ne": if (elem.value == rightSide) return generateFormError(message,errorObj,elem); break;
						
					}
				}
			} 

			// specific data types
			switch(datatype){
				case 'url':	if (!validaURL(elem)) return generateFormError(message,errorObj,elem);	break;
				case 'integer': elem.value = formatInteger(elem.value); if (elem.value == '') return generateFormError(message,errorObj,elem); break;
				case 'email':	if (!emailIsValid(elem.value)) return generateFormError(message,errorObj,elem); break;
				case 'date':	if (!isDate(elem.value)) return generateFormError(message,errorObj,elem); break;
				case 'time':
				case 'float':	elem.value = formatFloat(elem.value); if (elem.value == '') return generateFormError(message,errorObj,elem); break;
				case 'phone':
				case 'string':	default: if (elem.value == '') return generateFormError(message,errorObj,elem);
			}
			
			// dinamic data type
			/*
			if (ajaxcheck) {
				if (!ajaxCheckValidation(ajaxcheck,elem.value)) 
				
				if (ajaxmessage) message = ajaxmessage;
				return generateFormError(message,errorObj,elem);
			}
			*/

		}

		return true;
	}

	function blockEnter(evt) {
		evt = (evt) ? evt : event;
		var charCode = (evt.charCode) ? evt.charCode :
			  ((evt.which) ? evt.which : evt.keyCode);
		if (charCode == 13) {
			return false;
		} else {
			return true;
		}
	}