// XML HTTP Form Data Validation API
//
// Author : Jesse Kyzar
// Date : August 1, 2005
// ---------------------------------------------------------------------------------------------------------
// validateFormData(fieldLabel, validationType, dataValue, required)
//
// Arguments:
//   fieldLabel - the name of the form field as it appears in the browser and is used in the error message to help the user identify the error;
//   validationType - must be firstName, lastName, ssn, dateString (formatted yyyy-mm-dd), email, phoneNumber, address, city, zipcode, or propName;
//   dataValue - the actual value to be tested;
//   required - must be a string stating either true or false and specifies whether or not this particular piece of data is required;
// ---------------------------------------------------------------------------------------------------------
// compareDates(date1, dateLabel1, date2, dateLabel2)
//
// Arguments:
//   date1 - a string in any valid date format;
//   dateLabel1 - the form label for this aprticular date field, used for highlighting in the event an error is found;
//   date2 - a string in any valid date format;
//   dateLabel2 - the form label for this aprticular date field, used for highlighting in the event an error is found;
// ---------------------------------------------------------------------------------------------------------
// validateFormField(errors, fieldID, restoreColor, fieldLabel, validationType, dataValue, required)
//
// Arguments:
//   errors - an array used to track all errors for a single form;
//   fieldID - the DHTML wrapper for the label of the field being validated used for highlighting;
//   restoreColor - the color to return the field label once an error has been cleared;
//   fieldLabel - the name of the field being validated used for building error message;
//   validationType - the type of validation to perform on the field data;
//   dataValue - the value captured from the form field;
//   required - true or false depending upon whether or not the field is required;
// ---------------------------------------------------------------------------------------------------------
// compareFormDates(errors, fieldID1, fieldID2, restoreColor, dateLabel1, date1, dateLabel2, date2)
//
// Arguments:
//   errors - an array used to track all errors for a single form;
//   fieldID1 - the DHTML wrapper for the label of the first date field being validated used for highlighting;
//   fieldID2 - the DHTML wrapper for the label of the second date field being validated used for highlighting;
//   restoreColor - the color to return the field label once an error has been cleared;
//   dateLabel1 - the name of the first date field being validated used for building error message;
//   date1 - the value captured from the first date field;
//   dateLabel2 - the name of the second date field being validated used for building error message;
//   date2 - the value captured from the second date field;
// ---------------------------------------------------------------------------------------------------------
// checkRequiredField(errors, fieldID, restoreColor, fieldLabel, dataValue)
//
// Arguments:
//   errors - an array used to track all errors for a single form;   
//   fieldID - the DHTML wrapper for the label of the field being validated used for highlighting;
//   restoreColor - the color to return the field label once an error has been cleared;
//   fieldLabel - the name of the field being validated used for building error message;
//   dataValue - the value captured from the form field;
// ---------------------------------------------------------------------------------------------------------
// displayErrors(errors)
//
// Argument:
//   errors - an array containing all validation error messages
// ---------------------------------------------------------------------------------------------------------
// displayMessages(headerMessage, bodyMessage)
//
// Arguments:
//   headerMessage - boldfaced message to appear at the top of the error message display area
//   bodyMessage - submessages that provide detailed error information
// ---------------------------------------------------------------------------------------------------------
// ---------------------------------------------------------------------------------------------------------
// XmlHttp_DataValidation.js is designed to provide a way of performing server-side data validation without
// the necessity of submitting a web form.  An additional script is needed to handle implementation.  Returns
// error information or the string 'Ok' if no validation errors are found.
// ---------------------------------------------------------------------------------------------------------

function  validateFormData(fieldLabel, validationType, dataValue, required) {
	try {
		//create new instance of XML HTTP object and send request to server;
		if(window.XMLHttpRequest) {
			var validationRequest = new XMLHttpRequest();
		}
		else {
			var validationRequest = new ActiveXObject("Microsoft.XMLHTTP");
		}

		var validationURL = "/scripts/XmlHttp_DataValidation.cfm"; 
        var validationParams = "fieldLabel=" + fieldLabel.replace(/(&)/, "%26") + "&" + validationType + "=" + escape(dataValue) + "&required=" + required;

		validationRequest.open("POST", validationURL, false);
        validationRequest.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
        validationRequest.setRequestHeader("Content-length", validationParams.length);
        validationRequest.setRequestHeader("Connection", "close");
		validationRequest.send(validationParams);

		//return result if all went well; otherwise return an error message;
		if(validationRequest.status == "200") {
			//var validationResponse = validationRequest.responseXML.documentElement;
			//return validationResponse.childNodes[0].childNodes[0].text;
			return trim(validationRequest.responseText);
			
		}
		else {
			alert("HTTP Status: " + validationRequest.status);
			return "ERROR: No validation result returned. Notify Help Desk.";
		}
	}
	catch(e) {
		return "ERROR: Could not connect to data source. Notify Help Desk.";
	}
}

function compareDates(date1, dateLabel1, date2, dateLabel2) {
	try {
		//create new instance of XML HTTP object and send request to server;
		if(window.XMLHttpRequest) {
			var validationRequest = new XMLHttpRequest();
		}
		else {
			var validationRequest = new ActiveXObject("Microsoft.XMLHTTP");
		}
		var validationURL = "/scripts/XmlHttp_DataValidation.cfm";
		var validationParams = "compareDates=true&date1=" + date1 + "&dateLabel1=" + dateLabel1 + "&date2=" + date2 + "&dateLabel2=" + dateLabel2; 

		validationRequest.open("POST", validationURL, false);
        validationRequest.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
        validationRequest.setRequestHeader("Content-length", validationParams.length);
        validationRequest.setRequestHeader("Connection", "close");
		validationRequest.send(validationParams);

		//return result if all went well; otherwise return an error message;
		if(validationRequest.status == "200") {
			return trim(validationRequest.responseText);
		}
		else {
			alert(validationRequest.status);
			return "ERROR: No validation result returned. Notify Help Desk.";
		}
	}
	catch(e) {
		return "ERROR: Could not connect to data source. Notify Help Desk.";
	}		
}

function validateFormField(errors, fieldID, restoreColor, fieldLabel, validationType, dataValue, required) {
	var result = validateFormData(fieldLabel, validationType, dataValue, required);
	
	fieldID.style.color = restoreColor;
	
	if(result != "Ok") {
		errors.push(result);
		if(fieldID != null) {
			fieldID.style.color = "#ff0000";
		}
	}
	
	return errors;
}

function compareFormDates(errors, fieldID1, fieldID2, restoreColor, dateLabel1, date1, dateLabel2, date2) {
	var result = compareDates(date1, dateLabel1, date2, dateLabel2); 
	
	fieldID1.style.color = restoreColor;
	fieldID2.style.color = restoreColor;
	
	if(result != "Ok") {
		errors.push(result);
		if(fieldID1 != null) {
			fieldID1.style.color = "#ff0000";
		}		
		if(fieldID2 != null) {
			fieldID2.style.color = "#ff0000";
		}		
	}
	
	return errors;
}

function validateRadioButton(errors, fieldID, restoreColor, radioLabel, radioField) {
	var checked = 0;

	fieldID.style.color = restoreColor;
	
	for(var i = 0; i < radioField.length; i++) {
		if(radioField[i].checked) { checked++; }
	}

	var result = ((checked) ? "Ok" : radioLabel + " is required!");
	if(result != "Ok") {
		errors.push(result);
		if(fieldID != null) {
			fieldID.style.color = "#ff0000";
		}
	}
	return errors;
}

function checkRequiredField(errors, fieldID, restoreColor, fieldLabel, dataValue) {
	//remove all whitespace from user input 
	var newDataValue = dataValue.replace(/[\s]+/, "");
	//test length of result
	var result = ((newDataValue.length == 0) ? fieldLabel + " is required." : "Ok");
	
	fieldID.style.color = restoreColor;
	
	if(result != "Ok") {
		errors.push(result);
		if(fieldID != null) {
			fieldID.style.color = "#ff0000";
		}
	}
	
	return errors;
}

function displayErrors(errors) {
		document.getElementById('errorHeader').style.color = "#ff0000";
		
		if(errors.length == 1) {
			document.getElementById('errorHeader').innerText = errors.length + " error was found in your request.";
		}
		else {
			document.getElementById('errorHeader').innerText = errors.length + " errors were found in your request.";
		}
		
		document.getElementById('errorMessages').style.color = "#ff0000";
		
		var errorText = "";
		var lineItem = 0;
		
		for(var i = 0; i < errors.length; i++) {
			lineItem++;
			errorText += lineItem.toString() + ") " + errors[i] + "\n";
		}
		
		document.getElementById('errorMessages').innerText = errorText;
}

function displayMessages(headerMessage, bodyMessage) {
		document.getElementById('errorHeader').style.color = "#0000ff";
		document.getElementById('errorHeader').innerText = headerMessage;
		document.getElementById('errorMessages').style.color = "#0000ff";
		document.getElementById('errorMessages').innerText = bodyMessage;
}

function resetMessages() {
		if((document.getElementById('errorHeader').innerText.length > 0) || (document.getElementById('errorMessages').innerText.length > 0)) {
			document.getElementById('errorHeader').style.color = "#000000";
			document.getElementById('errorHeader').innerText = "";
			document.getElementById('errorMessages').style.color = "#000000";
			document.getElementById('errorMessages').innerText = "";					
		}
}

function trim(strValue) {
	return strValue.replace(/^\s*|\s*$/g,'');
}