/*********************************************************
Set of JavaScript functions used for validation
**********************************************************/
var isSaveClicked;
isSaveClicked = "FALSE"
/***********************************************************
errorHandler()
Used by Netscape to return the error message to the user.
Best used only when debuggind in development. Turn on by 
adding the following line to a form:
if (navigator.appName=="Netscape") window.onerror = errorHandler;
***********************************************************/
function errorHandler( e, f, l ) {
	alert("Error\nFile: " + f + "\nLine: " + l + "\nError:" + e);
	return true;
}
/***********************************************************
Controlla il valore selezionato in una checkbox
***********************************************************/
function CheckSelectedValue( obj, valore ){
	for (var r=0; r < obj.length; r++){
		if ( obj[r].checked ) {
			if (obj[r].value == valore) {
					return true;
			}
		}
	}
	return false;
}
/***********************************************************
doSaveDoc is used to salvare the from the server
************************************************************/
function doSaveDoc() {
	if ( doSubmit(document.forms[0], true ) ) {
		if (isSaveClicked == "FALSE") {
			document.forms[0].submit();
			isSaveClicked = "TRUE";
		} else {
			alert("Il comando è già stato inviato al server! \nPremere OK e attendere");
		}	
	}
}
/***********************************************************
doDelete is used to delete the from the server
The user is first asked to confirm that this is what they
want to do. Giving them the chance to cancel the action.
This works SIMPLY by changing the end of the URL from 
"?OpenDocument" to "?DeleteDocument"
************************************************************/
function doDelete() {
	if ( confirm('Conferma la cancellazione del documento?') ){
		location.search = "?DeleteDocument";
	}
}
/***********************************************************
trim is a simple function to remove leading/trailing spaces
************************************************************/
function trim(aStr) {
	return aStr.replace(/^\s{1,}/, "").replace(/\s{1,}$/, "")
}
/***********************************************************
Checks if time is in HH:MM:SS AM/PM format.
The seconds and AM/PM are optional.
**********************************************************/
function validateTime(timeStr) {
var timePat = /^(\d{1,2}):(\d{2})(:(\d{2}))?(\s?(AM|am|PM|pm))?$/;
var matchArray = timeStr.value.match(timePat);
if (matchArray == null) {
	return false;
}
hour = matchArray[1];
minute = matchArray[2];
second = matchArray[4];
ampm = matchArray[6];
if (second=="") { second = null; }
if (ampm=="") { ampm = null }
if (hour < 0  || hour > 23) {
	return false;
}
if (minute<0 || minute > 59) {
	return false;
}
if (second != null && (second < 0 || second > 59)) {
	return false;
}
return true;
}
/***********************************************************
validateNumber()
This function checks that the value of a field is a number
and, optionally within a certain range.
Arguments:
val = Value to be checked
min = Optional minimum allowed value
max = Optional maximum allowed value
************************************************************/
function validateNumber(val, min, max){
	if ( isNaN( val ) ) return false;
	if ( min && val < min ) return false;
	if ( max && val > max ) return false;
	return true;
}
/***********************************************************
dateComponents()
This function splits a date in to the day, month and year 
components, depending on the format supplied. Used by Date 
Validation routine.
Arguments:
obj = Input whose value is to be checked
format = date format, ie mm/dd or dd/mm
************************************************************/
function dateComponents(dateStr, format) {
	var results = new Array();
	var datePat = /^(\d{1,2})(\/|-|\.)(\d{1,2})\2(\d{2}|\d{4})$/;
	var matchArray = dateStr.match(datePat);
	
	if (matchArray == null) { 
		return null; 
	}
	//check for two digit (20th century) years and prepend 19.
	matchArray[4] = (matchArray[4].length == 2) ? '19' + matchArray[4] : matchArray[4];
	// parse date into variables
	if (format.charAt(0)=="d"){ //what format does the server use for dates? 
		results[0] = matchArray[1];
		results[1] = matchArray[3];
	} else { 
		results[1] = matchArray[1];
		results[0] = matchArray[3]; }
	results[2] = matchArray[4];
	return results;
}
/***********************************************************
valiDate()
This function checks that the value of a date is in the 
correct format and, optionally, within a certain range.
Arguments:
obj = Input whose value is to be checked
min = Optional minimum allowed value
max = Optional maximum allowed value
format = date format, ie mm/dd or dd/mm
************************************************************/
function valiDate(obj, min, max, format){
	
	dateBits = dateComponents(obj.value, format);
	if (dateBits == null) return false;
//Check it is a valid date first
	day = dateBits[0];
	month = dateBits[1];
	year = dateBits[2];
	if ((month < 1 || month > 12) || (day < 1 || day > 31)) { // check month range 
		return false;
	} 
	if ((month==4 || month==6 || month==9 || month==11) && day==31) {
		return false;
	}
	if (month == 2) {
	// check for february 29th 
		var isleap = (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0)); 
		if (day>29 || (day==29 && !isleap)) {
			return false;
		}
	} 
//Now check whether a range is specified and if in bounds
	var theDate = new Date(dateBits[2], parseInt(dateBits[1]) - 1, dateBits[0]);
	if ( min ) {
		minBits = dateComponents (min, format);
		var minDate = new Date(minBits[2], parseInt(minBits[1]) - 1, minBits[0]);
		if ( minDate.getTime() > theDate.getTime() ) return false;
	} 
	if ( max) {
		maxBits = dateComponents (max, format);
		var maxDate = new Date(maxBits[2], parseInt(maxBits[1]) - 1, maxBits[0]);
		if ( theDate.getTime() > maxDate.getTime() ) return false;
	}
	return true;
}
/***********************************************************
validateEmail()
This function checks that the value of a field is a valid 
SMTP e-mail address ie x@xx.xx
Arguments:
obj = Input whose value is to be checked
Original source:
http://javascript.internet.com
Author:
Sandeep V. Tamhankar (stamhankar@hotmail.com)
Note: Work in progress = validate SMTP OR Notes Canonical
************************************************************/
function validateEmail( obj ) {
	var emailStr = obj.value;
	var reg1 = /(@.*@)|(\.\.)|(@\.)|(\.@)|(^\.)/; // not valid
	var reg2 = /^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,3}|[0-9]{1,3})(\]?)$/; // valid
	if ( !reg1.test( emailStr ) && reg2.test( emailStr ) ) {
		return true;
	} else {
	 	return false;
	}
}
/***********************************************************
locateFileUpload()
Returns a handle to the file upload control on a form.
Used to get around the fact that there is no consistent
way to refer to the element cross-browser.
***********************************************************/
function locateFileUpload( f ) {
 for(var i = 0; i < f.elements.length; i ++)
  if( f.elements[i].type=='file' ){
  return f.elements[i];
 }
}
/***********************************************************
validateFileType()
This function checks that the type of file being uploaded
is allowed
Arguments:
obj = The File Upload control.
fTyp = Allowed file types
************************************************************/
function validateFileType( obj, fTyp ) {
dots = obj.value.split(".");
fType = "." + dots[dots.length-1];
if ( fTyp != null && fTyp.indexOf(fType) == -1 ) return false;
return true;
}
/***********************************************************
validateFileLimit()
This function checks that the value in a file upload
Arguments:
obj = The File Upload control
cur = Current number of file attachments
max = Limit on allowed files
************************************************************/
function validateFileLimit( obj, cur, max ) {
if ( cur >= max ) return false;
return true;
}
/***********************************************************
OnFailure()
This function returns the failure message to the user and
sets focus on the input in question.
Arguments:
obj = Input element on which to return focus
lbl = Field Label to prepend on to the message
msg = Array value for message to give the user
************************************************************/
function OnFailure( obj, lbl, msg ){
	var msgs = new Array();
	msgs["text"] = ": campo obbligatorio. \nInserire un valore.";
	msgs["textarea"] = ": campo obbligatorio. \nInserire un valore.";
	msgs["select-one"] = ": campo obbligatorio. \nSelezionare un valore.";
	msgs["select-multiple"] = ": campo obbligatorio. \nSelezionare un valore.";
	msgs["checkbox"] = ": campo obbligatorio. \nSelezionare un valore.";
	msgs["file"] = ": campo obbligatorio. \nSelezionare un file.";
	msgs["fileType"] = ": errore di selezione. \nInserire un valido tipo di file.";
	msgs["fileLimit"] = ": è un limitato upload. \nRidurre il numero di attachments.";
	msgs["radio"] = ": campo obbligatorio. \nSelezionare un elemento.";
	msgs["number"] = ": campo obbligatorio. \nSelezionare un numero valido.";
	msgs["date"] = ": è un campo data. \nInserire una data valida.";
	msgs["email"] = ": è un campo indirizzo. \nInserire un valido indirizzo e-mail.";
	msgs["time"] = ": è un campo ora. \nInserire un valore nel formato HH:MM.";
	if(msg[1]	|| msg[2]){ //upper/lower bound ranges have been specified
		if(msg[1]	&& msg[2]){//range
			term = ( msg[0] == "date" )? " ("+msg[3]+")" : "";
			alert(lbl + msgs[msg[0]] + term + " tra " + msg[1] + " and " + msg[2]);
		} else if (msg[1]) {//lower bound
			term = ( msg[0] == "number" ) ? " maggiore di " : " (" + msg[3] + ") after ";
			alert(lbl + msgs[msg[0]] + term + msg[1]);
		} else {//upper bound
			term = ( msg[0] == "number" )? " minode di " : " (" + msg[3] + ") before ";
			alert(lbl + msgs[msg[0]] + term + msg[2]);
		}
	} else {//no range given
		alert(lbl + msgs[msg[0]]);
	}
	
	obj.focus();
	return false;
}
/***********************************************************
isSomethingSelected()
This function is passed an object of type radio group or check
box. It then loops through all options and checks that 
one of them is selected, returning true if so.
Arguments:
obj = Reference to the parent object of the group.
************************************************************/
function isSomethingSelected( obj ){
	for (var r=0; r < obj.length; r++){
		if ( obj[r].checked ) return true;
	}
}
/***********************************************************
validateRequiredFields()
This function is passed an array of fields that are required
to be filled in and iterates through each ensuring they have
been correctly entered.
************************************************************/
function validateRequiredFields( f, a ){
	for (var i=0; i < a.length; i++){
		e = a[i][0];
			//checks input types: "text","select-one","select-multiple","textarea","checkbox","radio","file"
				switch (e.type) {
					case "text":
							if ( trim(e.value) == "" ) {
										return OnFailure(e, a[i][1], ["text"]);
							}
							if ( a[i][2] ) {
								switch ( a[i][2][0] ){
									case "number":
										if ( !validateNumber(e.value, a[i][2][1], a[i][2][2]) ) {
												return OnFailure(e, a[i][1], ["number", a[i][2][1], a[i][2][2]]);
										}
										break
									case "date":
										if ( !valiDate(e, a[i][2][1], a[i][2][2], a[i][2][3]) ) {
												return OnFailure(e, a[i][1], ["date", a[i][2][1], a[i][2][2], a[i][2][3]]);
										}
										break
									case "email":
										if ( !validateEmail(e) ) {
												return OnFailure(e, a[i][1], ["email"]);
										}
										break
								case "time":
										if ( !validateTime(e) ) {
												return OnFailure(e, a[i][1], ["time"]);
										}
										break
									default:
										break
								}
							}
						break
					case "file":
						//make sure AT LEAST one file gets attached
						if ( a[i][2][1] == 0 && trim(e.value) == "" ) {
								return OnFailure(e, a[i][1], ["file"]);
						}
						if ( trim(e.value) != "") {
							//check type of file that is being uploaded
							if ( a[i][2][0] != null && validateFileType( e, a[i][2][0] ) == false ) {
									return OnFailure(e, a[i][1], ["fileType"]);
							}
							//check that file limit has not been reached
							if ( a[i][2][2] != null && validateFileLimit( e, a[i][2][1], a[i][2][2] ) == false ) {
									return OnFailure(e, a[i][1], ["fileLimit"]);
							}
						}
						break
					case "textarea":
						if ( trim(e.value) == "" ) {
							return OnFailure(e, a[i][1], ["textarea"]);
						}
						break
					case "select-one":
						if ( e.selectedIndex == 0 ) {
							return OnFailure(e, a[i][1], ["select-one"]);
						}
						break
					case "select-multiple":
						if (e.selectedIndex == -1) {
							return OnFailure(e, a[i][1], ["select-multiple"]);
						}
						break
					default:
						//must be a checkbox or a radio group if none of above
 						if ( !e[0]) {//handle single item group first
							switch (e.type) {
							case "checkbox":
								if ( !e.checked )  return OnFailure(e, a[i][1], ["checkbox"]);
								break
							case "radio":
								if ( !e.checked )  return OnFailure(e, a[i][1], ["radio"]);
								break
							default:
									break
							}
						} else { //handle multi-item groups
							switch (e[0].type) {
							case "checkbox":
								if ( !isSomethingSelected( e ) ) {
								 return OnFailure(e[0], a[i][1], ["checkbox"]);
								}
								break
							case "radio":
								if ( !isSomethingSelected( e ) ) {
								 return OnFailure(e[0], a[i][1], ["radio"]);
								}
								break
							default:
									break
							}
						}
						break
				}
	}
	return true;
}