/* tool.js*/

function validateRegEx(regex, input, helpText, helpMessage) {
  // See if the input data validates OK
  if (!regex.test(input)) {
	 // The data is invalid, so set the help message and return false
	 if (helpText != null)
		helpText.innerHTML = helpMessage;
	 return false;
  }
  else {
	 // The data is OK, so clear the help message and return true
	 if (helpText != null)
		helpText.innerHTML = "";
	 return true;
  }
}

function validateNonEmpty(inputField, helpText) {
  // See if the input value contains any text
  return validateRegEx(/.+/,
	 inputField.value, helpText,
	 "Please enter a value.");
}

function validateLength(minLength, maxLength, inputField, helpText) {
  // See if the input value contains at least minLength but no more than maxLength characters
  return validateRegEx(new RegExp("^.{" + minLength + "," + maxLength + "}$"),
	 inputField.value, helpText,
	 "Please enter a value " + minLength + " to " + maxLength +
	 " characters in length.");
}

function validateZipCode(inputField, helpText) {
  // First see if the input value contains data
  if (!validateNonEmpty(inputField, helpText))
	 return false;

  // Then see if the input value is a ZIP code
  return validateRegEx(/^\d{5}$/,
	 inputField.value, helpText,
	 "Please enter a 5-digit ZIP code.");
}

function validateDate(inputField, helpText) {
  // First see if the input value contains data
  if (!validateNonEmpty(inputField, helpText))
	 return false;

  // Then see if the input value is a date
  return validateRegEx(/^\d{2}\/\d{2}\/(\d{2}|\d{4})$/,
	 inputField.value, helpText,
	 "Please enter a date (for example, 01/14/1975).");
}

function validatePhone(inputField, helpText) {
  // First see if the input value contains data
  if (!validateNonEmpty(inputField, helpText))
	 return false;

  // Then see if the input value is a phone number
  return validateRegEx(/^\d{3}-\d{3}-\d{4}$/,
	 inputField.value, helpText,
	 "Please enter a phone number (for example, 123-456-7890).");
}

function validateEmail(inputField, helpText) {
  // First see if the input value contains data
  if (!validateNonEmpty(inputField, helpText))
	 return false;

  // Then see if the input value is an email address
  return validateRegEx(/^[\w\.-_\+]+@[\w-]+(\.\w{2,3})+$/,
	 inputField.value, helpText,
	 "Please enter an email address (for example, johndoe@acme.com).");
}

function placeOrder(form) {
  if (validateLength(1, 32, form["message"], form["message_help"]) &&
	 validateZipCode(form["zipcode"], form["zipcode_help"]) &&
	 validateDate(form["date"], form["date_help"]) &&
	 validateNonEmpty(form["name"], form["name_help"]) &&
	 validatePhone(form["phone"], form["phone_help"]) &&
	 validateEmail(form["email"], form["email_help"])) {
	 // Submit the order to the server
	 form.submit();
  } else {
	 alert("I'm sorry but there is something wrong with the order information.");
  }
}