source: trunk/lib/FormValidator.inc.php @ 722

<?php
/**
 * The Strangecode Codebase - a general application development framework for PHP
 * For details visit the project site: <http://trac.strangecode.com/codebase/>
 * Copyright 2001-2012 Strangecode, LLC
 *
 * This file is part of The Strangecode Codebase.
 *
 * The Strangecode Codebase is free software: you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your option)
 * any later version.
 *
 * The Strangecode Codebase is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * The Strangecode Codebase. If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * FormValidator.inc.php
 *
 * The FormValidator class provides a method for validating input from
 * http requests and displaying errors.
 *
 * @requires  codebase/lib/Validator.inc.php
 * @author    Quinn Comendant <quinn@strangecode.com>
 * @version   1.8
 *
 * Example of use:
---------------------------------------------------------------------
// The object that validates form input.
require_once 'codebase/lib/FormValidator.inc.php';
$fv = new FormValidator();

$fv->empty('field_name', sprintf(_("%s cannot be blank."), _("Field name")), MSG_ERR, __FILE__, __LINE__);
$fv->stringLength('field_name', 0, 255, sprintf(_("%s must be %d-to-%d characters in length."), _("Field name"), 0, 255), MSG_ERR, __FILE__, __LINE__);
$fv->isInteger('field_name', sprintf(_("%s must be an integer."), _("Field name")), MSG_ERR, __FILE__, __LINE__);
$fv->checkRegex('field_name', '/^\d{4}$|^$/', true, sprintf(_("%s must be in MMYY format."), _("Field name")), MSG_ERR, __FILE__, __LINE__);
$fv->numericRange('field_name', 0, 65535, sprintf(_("%s must be a number between %d and %d."), _("Field name"), 0, 65535), MSG_ERR, __FILE__, __LINE__);
$fv->validatePhone('field_name', MSG_ERR, __FILE__, __LINE__);
$fv->validateEmail('field_name', MSG_ERR, __FILE__, __LINE__);
$fv->validateStrDate('field_name', sprintf(_("%s must be a valid date in YYYY-MM-DD format."), _("Field name")), MSG_ERR, __FILE__, __LINE__);
if (is_null($var)) {
    $fv->addError('field_name', sprintf(_("%s is invalid."), _("Field name")), MSG_ERR, __FILE__, __LINE__);
}
if ($fv->anyErrors()) {
    // Errors!
}
---------------------------------------------------------------------
 */

// Credit card types are defined in class Validator.

require_once 'codebase/lib/Validator.inc.php';

class FormValidator
{

    // Class parameters.
    protected $_params = array(
        'error' => ' sc-msg-error ',
        'warning' => ' sc-msg-warning ',
        'notice' => ' sc-msg-notice ',
        'success' => ' sc-msg-success ',
        'use_raise_msg' => false,
    );

    // Array filling with error messages.
    public $errors = array();

    /**
    * FormValidator constructor.
    *
    * @access public
    * @param array $params Configuration parameters for this object.
    */
    public function __construct($params=array())
    {
        // Set custom parameters.
        $this->setParam($params);
    }

    /**
    * Set (or overwrite existing) parameters by passing an array of new parameters.
    *
    * @access public
    * @param  array    $params     Array of parameters (key => val pairs).
    */
    public function setParam($params)
    {
        $app =& App::getInstance();

        if (isset($params) && is_array($params)) {
            // Merge new parameters with old overriding only those passed.
            $this->_params = array_merge($this->_params, $params);
        } else {
            $app->logMsg(sprintf('Parameters are not an array: %s', $params), LOG_ERR, __FILE__, __LINE__);
        }
    }

    /**
    * Return the value of a parameter, if it exists.
    *
    * @access public
    * @param string $param        Which parameter to return.
    * @param  const  $type  A LOG_* constant (see App->logMsg())
    * @param  const  $file  Filename to log (usually __FILE__)
    * @param  const  $line  Line number to log (usually __LINE__)
    * @return mixed               Configured parameter value.
    */
    public function getParam($param)
    {
        $app =& App::getInstance();

        if (array_key_exists($param, $this->_params)) {
            return $this->_params[$param];
        } else {
            $app->logMsg(sprintf('Parameter is not set: %s', $param), LOG_DEBUG, __FILE__, __LINE__);
            return null;
        }
    }

    /**
    * Return the current list of errors.
    *
    * @param  const  $type  A LOG_* constant (see App->logMsg())
    * @param  const  $file  Filename to log (usually __FILE__)
    * @param  const  $line  Line number to log (usually __LINE__)
    * @return array    an array of errors in the following arrangement:
    *                  keys: the name of the variable with an error
    *                  vals: the message to display for that error
    */
    public function getErrorList()
    {
        return $this->errors;
    }

    /**
    * Add an error to the errors stack.
    *
    * @param   string $form_name   The name of the incoming form variable.
    * @param   string $msg         The error message for that form.
    * @param   int    $type        The type of message: MSG_NOTICE,
    *                              MSG_SUCCESS, MSG_WARNING, or MSG_ERR.
    * @param   string $file        __FILE__.
    * @param   string $line        __LINE__.
    */
    public function addError($form_name, $msg='', $type=MSG_ERR, $file=null, $line=null)
    {
        $app =& App::getInstance();

        if (true === $this->getParam('use_raise_msg')) {
            $app->raiseMsg($msg, $type, $file, $line);
        }

        $this->errors[] = array(
            'name' => $form_name,
            'message' => $msg,
            'type' => $type,
            'file' => $file,
            'line' => $line
        );
    }

    /**
    * Check whether any errors have been triggered.
    *
    * @param  string $form_name the name of the incoming form variable
    * @param  const  $type  A LOG_* constant (see App->logMsg())
    * @param  const  $file  Filename to log (usually __FILE__)
    * @param  const  $line  Line number to log (usually __LINE__)
    * @return bool   true if any errors were found, or if found for
    *                a variable of $form_name, false otherwise
    */
    public function anyErrors($form_name=null)
    {
        if (isset($form_name)) {
            foreach ($this->errors as $err) {
                if ($err['name'] == $form_name) {
                    return $err['type'];
                }
            }
            return false;
        } else {
            return (sizeof($this->errors) > 0);
        }
    }

    /**
    * Reset the error list.
    */
    public function resetErrorList()
    {
        $this->errors = array();
    }

    /**
    * Prints the HTML for displaying error messages.
    *
    * @param   string  $above    Additional message to print above error messages (e.g. "Oops!").
    * @param   string  $below    Additional message to print below error messages (e.g. "Please fix and resubmit").
    * @param   string  $print_gotohash_js  Print a line of javascript that scrolls the browser window down to view any error messages.
    * @param   string  $hash     The #hashtag to scroll to.
    * @access  public
    * @author  Quinn Comendant <quinn@strangecode.com>
    * @since   15 Jul 2005 01:39:14
    */
    public function printErrorMessages($above='', $below='', $print_gotohash_js=false, $hash='sc-msg-formvalidator')
    {
        $app =& App::getInstance();
        if ($this->anyErrors()) {
            // data-gotohash="
" is to be used by sites that refuse inline JS (via CSP) but needs to be referenced from an external JS.
            ?><div class="sc-msg" id="sc-msg-formvalidator" data-gotohash="<?php echo oTxt($hash); ?>"><?php
            if ('' != $above) {
                ?><div class="sc-above"><?php echo oTxt($above); ?></div><?php
            }
            foreach ($this->getErrorList() as $e) {
                if ('' != $e['message'] && is_string($e['message'])) {
                    if (error_reporting() > 0 && $app->getParam('display_errors') && isset($e['file']) && isset($e['line'])) {
                        echo "\n<!-- [" . $e['file'] . ' : ' . $e['line'] . '] -->';
                    }
                    switch ($e['type']) {
                    case MSG_ERR:
                        echo '<div data-alert data-closable class="sc-msg-error alert-box callout alert">' . $e['message'] . '<a class="close close-button" aria-label="Dismiss alert" data-close><span aria-hidden="true">&times;</span></a></div>';
                        break;

                    case MSG_WARNING:
                        echo '<div data-alert data-closable class="sc-msg-warning alert-box callout warning">' . $e['message'] . '<a class="close close-button" aria-label="Dismiss alert" data-close><span aria-hidden="true">&times;</span></a></div>';
                        break;

                    case MSG_SUCCESS:
                        echo '<div data-alert data-closable class="sc-msg-success alert-box callout success">' . $e['message'] . '<a class="close close-button" aria-label="Dismiss alert" data-close><span aria-hidden="true">&times;</span></a></div>';
                        break;

                    case MSG_NOTICE:
                    default:
                        echo '<div data-alert data-closable class="sc-msg-notice alert-box callout primary info">' . $e['message'] . '<a class="close close-button" aria-label="Dismiss alert" data-close><span aria-hidden="true">&times;</span></a></div>';
                        break;
                    }
                }
            }
            if ('' != $below) {
                ?><div class="sc-below"><?php echo oTxt($below); ?></div><?php
            }
            ?></div><?php
            if ($print_gotohash_js) {
                ?>
                <script type="text/javascript">
                /* <![CDATA[ */
                window.location.hash = '#<?php echo urlencode($hash); ?>';
                /* ]]> */
                </script>
                <?php
            }
        }
    }

    /**
    * If this form has an error, print an error marker like "<<".
    *
    * @param  string $form_name the name of the incoming form variable
    * @param  string $marker    A string to print if there is an error. if
    *                           not provided, use default.
    */
    public function err($form_name, $marker=null)
    {
        if (false !== ($type = $this->anyErrors($form_name))) {
            if (isset($marker)) {
                echo $marker;
            } else {
                switch ($type) {
                case MSG_ERR:
                default:
                    echo $this->getParam('error');
                    break;

                case MSG_WARNING:
                    echo $this->getParam('warning');
                    break;

                case MSG_NOTICE:
                    echo $this->getParam('notice');
                    break;

                case MSG_SUCCESS:
                    echo $this->getParam('success');
                    break;
                }
            }
        }
    }

    /**
    * Ensure the length of string is non-zero.
    *
    * @param  string $form_name the name of the incoming form variable
    * @param  string $msg       the message to display on error
    * @param  const  $type  A LOG_* constant (see App->logMsg())
    * @param  const  $file  Filename to log (usually __FILE__)
    * @param  const  $line  Line number to log (usually __LINE__)
    * @return bool   true if form is not empty, false otherwise.
    */
    public function notEmpty($form_name, $msg='', $type=MSG_ERR, $file=null, $line=null)
    {
        if (Validator::notEmpty(getFormData($form_name), LOG_NOTICE, $file, $line)) {
            return true;
        } else {
            $this->addError($form_name, $msg, $type, $file, $line);
            return false;
        }
    }

    /*
    * We were using the isEmpty method *wrong* for years and should have been using notEmpty because it is more grammatically correct.
    * Because the only use is to ensure a value is not empty, we're simply going to alias this method to notEmpty().
    * @since    03 Jun 2006 22:56:46
    */
    public function isEmpty($form_name, $msg='', $type=MSG_ERR, $file=null, $line=null)
    {
        return $this->notEmpty($form_name, $msg, $type, $file, $line);
    }

    /**
    * Check whether input is a string.
    *
    * @param  string $form_name the name of the incoming form variable
    * @param  string $msg       the message to display on error
    * @param  const  $type  A LOG_* constant (see App->logMsg())
    * @param  const  $file  Filename to log (usually __FILE__)
    * @param  const  $line  Line number to log (usually __LINE__)
    * @return bool   true if form is a string, false otherwise.
    */
    public function isString($form_name, $msg='', $type=MSG_ERR, $file=null, $line=null)
    {
        if (Validator::isString(getFormData($form_name), LOG_NOTICE, $file, $line)) {
            return true;
        } else {
            $this->addError($form_name, $msg, $type, $file, $line);
            return false;
        }
    }

    /**
    * Check whether input is a number. Allows negative numbers.
    *
    * @param  string $form_name the name of the incoming form variable
    * @param  string $msg       the message to display on error
    * @param  const  $type  A LOG_* constant (see App->logMsg())
    * @param  const  $file  Filename to log (usually __FILE__)
    * @param  const  $line  Line number to log (usually __LINE__)
    * @return bool   true if no errors found, false otherwise
    */
    public function isNumber($form_name, $msg='', $type=MSG_ERR, $file=null, $line=null)
    {
        if (Validator::isNumber(getFormData($form_name), LOG_NOTICE, $file, $line)) {
            return true;
        } else {
            $this->addError($form_name, $msg, $type, $file, $line);
            return false;
        }
    }

    /**
    * addError if input is NOT an integer. Don't just use is_int() because the
    * data coming from the user is *really* a string.
    *
    * @param  string $form_name the name of the incoming form variable
    * @param  string $msg       the message to display on error
    * @param  bool   $negative_ok   Set to true if negative numbers will be allowed.
    * @param  const  $type  A LOG_* constant (see App->logMsg())
    * @param  const  $file  Filename to log (usually __FILE__)
    * @param  const  $line  Line number to log (usually __LINE__)
    * @return bool   true if value is an integer
    */
    public function isInteger($form_name, $msg='', $negative_ok=false, $type=MSG_ERR, $file=null, $line=null)
    {
        if (Validator::isInteger(getFormData($form_name), $negative_ok, LOG_NOTICE, $file, $line)) {
            return true;
        } else {
            $this->addError($form_name, $msg, $type, $file, $line);
            return false;
        }
    }

    /**
    * Check whether input is a float. Don't just use is_float() because the
    * data coming from the user is *really* a string. Integers will also
    * pass this test.
    *
    * @param  string $form_name the name of the incoming form variable
    * @param  string $msg       the message to display on error
    * @param  const  $type  A LOG_* constant (see App->logMsg())
    * @param  const  $file  Filename to log (usually __FILE__)
    * @param  const  $line  Line number to log (usually __LINE__)
    * @return bool   true if value is a float
    */
    public function isFloat($form_name, $msg='', $negative_ok=false, $type=MSG_ERR, $file=null, $line=null)
    {
        if (Validator::isFloat(getFormData($form_name), $negative_ok, LOG_NOTICE, $file, $line)) {
            return true;
        } else {
            $this->addError($form_name, $msg, $type, $file, $line);
            return false;
        }
    }

    /**
    * Check whether input is a Decimal or Fixed type. Use to check values to be stored in mysql decimal, numeric, num, or fixed types.
    * The arguments $max and $dec should match M and D of the column definition "DECIMAL(M,D)".
    * Note: some integers and floats will also pass this test.
    * https://dev.mysql.com/doc/refman/5.5/en/fixed-point-types.html
    *
    * @param  string    $form_name      The name of the incoming form variable
    * @param  int       $max            Total max number of digits.
    * @param  int       $dec            Total max number of digits after the decimal place.
    * @param  string    $msg            The message to display on error
    * @param  bool      $negative_ok    If the value can be unsigned.
    * @param  const  $type  A LOG_* constant (see App->logMsg())
    * @param  const  $file  Filename to log (usually __FILE__)
    * @param  const  $line  Line number to log (usually __LINE__)
    * @return bool                      True if value is a decimal, false otherwise.
    */
    public function isDecimal($form_name, $max=10, $dec=2, $negative_ok=false, $msg='', $type=MSG_ERR, $file=null, $line=null)
    {
        if (Validator::isDecimal(getFormData($form_name), $max, $dec, $negative_ok, LOG_NOTICE, $file, $line)) {
            return true;
        } else {
            // Set the example to a sequence of Ns with $max number of digits and a faction part length of $dec.
            $msg = str_replace('{EX}', sprintf('%s.%s', str_repeat('N', $max - $dec), str_repeat('N', $dec)), $msg);
            $this->addError($form_name, $msg, $type, $file, $line);
            return false;
        }
    }

    /**
    * Check whether input is an array.
    *
    * @param  string $form_name the name of the incoming form variable
    * @param  string $msg       the message to display on error
    * @param  const  $type  A LOG_* constant (see App->logMsg())
    * @param  const  $file  Filename to log (usually __FILE__)
    * @param  const  $line  Line number to log (usually __LINE__)
    * @return bool   true if value is an array
    */
    public function isArray($form_name, $msg='', $type=MSG_ERR, $file=null, $line=null)
    {
        if (Validator::isArray(getFormData($form_name), LOG_NOTICE, $file, $line)) {
            return true;
        } else {
            $this->addError($form_name, $msg, $type, $file, $line);
            return false;
        }
    }

    /**
    * Check whether input matches the specified perl regular expression
    * pattern.
    *
    * @param  string $form_name        The name of the incoming form variable
    * @param  int    $regex            Perl regex that the string must match
    * @param  bool   $valid_on_match   Set to true to be valid if match, or false to be valid if the match fails.
    * @param  string $msg              The message to display on error
    * @param  const  $type  A LOG_* constant (see App->logMsg())
    * @param  const  $file  Filename to log (usually __FILE__)
    * @param  const  $line  Line number to log (usually __LINE__)
    * @return bool   true if value passes regex test (or false if $valid_on_match=false)
    */
    public function checkRegex($form_name, $regex, $valid_on_match=true, $msg='', $type=MSG_ERR, $file=null, $line=null)
    {
        if (Validator::checkRegex(getFormData($form_name), $regex, $valid_on_match, LOG_NOTICE, $file, $line)) {
            return true;
        } else {
            $this->addError($form_name, $msg, $type, $file, $line);
            return false;
        }
    }

    /**
    * Tests if the string length is between specified values. Whitespace excluded for min.
    *
    * @param  string $form_name the name of the incoming form variable
    * @param  int    $min       minimum length of string, inclusive
    * @param  int    $max       maximum length of string, inclusive
    * @param  string $msg       the message to display on error
    * @param  const  $type  A LOG_* constant (see App->logMsg())
    * @param  const  $file  Filename to log (usually __FILE__)
    * @param  const  $line  Line number to log (usually __LINE__)
    * @return bool   true if string length is within given boundaries
    */
    public function stringLength($form_name, $min, $max, $msg='', $type=MSG_ERR, $file=null, $line=null)
    {
        if (Validator::stringLength(getFormData($form_name), $min, $max, LOG_NOTICE, $file, $line)) {
            return true;
        } else {
            $this->addError($form_name, $msg, $type, $file, $line);
            return false;
        }
    }

    /**
    * Check whether input is within a valid numeric range.
    *
    * @param  string $form_name the name of the incoming form variable
    * @param  int    $min       minimum value of number, inclusive
    * @param  int    $max       maximum value of number, inclusive
    * @param  string $msg       the message to display on error
    * @param  const  $type  A LOG_* constant (see App->logMsg())
    * @param  const  $file  Filename to log (usually __FILE__)
    * @param  const  $line  Line number to log (usually __LINE__)
    * @return bool   true if no errors found, false otherwise
    */
    public function numericRange($form_name, $min, $max, $msg='', $type=MSG_ERR, $file=null, $line=null)
    {
        if (Validator::numericRange(getFormData($form_name), $min, $max, LOG_NOTICE, $file, $line)) {
            return true;
        } else {
            $this->addError($form_name, $msg, $type, $file, $line);
            return false;
        }
    }

    /**
    * Validates an email address based on the recommendations in RFC 3696.
    * Is more loose than restrictive, to allow the many valid variants of
    * email addresses while catching the most common mistakes.
    * http://www.faqs.org/rfcs/rfc822.html
    * http://www.faqs.org/rfcs/rfc2822.html
    * http://www.faqs.org/rfcs/rfc3696.html
    * http://www.faqs.org/rfcs/rfc1035.html
    *
    * @access  public
    * @param   string  $form_name   The name of the incoming form variable.
    * @param   bool    $strict      Run strict tests (check if the domain exists and has an MX record assigned)
    * @param  const  $type  A LOG_* constant (see App->logMsg())
    * @param  const  $file  Filename to log (usually __FILE__)
    * @param  const  $line  Line number to log (usually __LINE__)
    * @return  bool                 Validity of address.
    * @author  Quinn Comendant <quinn@strangecode.com>
    */
    public function validateEmail($form_name, $strict=false, $type=MSG_ERR, $file=null, $line=null)
    {
        $app =& App::getInstance();

        $email = getFormData($form_name);

        if ('' == trim($email)) {
            // No email address provided, and that's okay.
            return true;
        }

        // Validator::validateEmail() returns a value that relates to the Validate::EMAIL_* constants (defined in Validator.inc.php).
        switch (Validator::validateEmail($email, $strict, LOG_NOTICE, $file, $line)) {
        case Validator::EMAIL_REGEX_FAIL:
            // Failed regex match.
            $this->addError($form_name, sprintf(_("The email address <em>%s</em> is formatted incorrectly."), oTxt($email)), $type, $file, $line);
            $app->logMsg(sprintf('The email address %s is not valid.', oTxt($email)), LOG_DEBUG, __FILE__, __LINE__);
            return false;

        case Validator::EMAIL_LENGTH_FAIL:
            // Failed length requirements.
            $this->addError($form_name, sprintf(_("The email address <em>%s</em> is too long (email addresses must have fewer than 256 characters)."), oTxt($email)), $type, $file, $line);
            $app->logMsg(sprintf('The email address %s must contain less than 256 characters.', oTxt($email)), LOG_DEBUG, __FILE__, __LINE__);
            return false;

        case Validator::EMAIL_MX_FAIL:
            // Failed MX record test.
            $this->addError($form_name, sprintf(_("The email address <em>%s</em> does not have a valid domain name"), oTxt($email)), $type, $file, $line);
            $app->logMsg(sprintf('The email address %s does not have a valid domain name.', oTxt($email)), LOG_NOTICE, __FILE__, __LINE__);
            return false;

        case Validator::EMAIL_SUCCESS:
        default :
            return true;
        }
    }

    /**
    * Check whether input is a valid phone number. Notice: it is now set
    * to allow characters like - or () or + so people can type in a phone
    * number that looks like: +1 (530) 555-1212
    *
    * @param  string  $form_name the name of the incoming form variable
    * @param  const  $type  A LOG_* constant (see App->logMsg())
    * @param  const  $file  Filename to log (usually __FILE__)
    * @param  const  $line  Line number to log (usually __LINE__)
    * @return bool    true if no errors found, false otherwise
    */
    public function validatePhone($form_name, $type=MSG_ERR, $file=null, $line=null)
    {
        $app =& App::getInstance();

        $phone = getFormData($form_name);

        // Validator::validateEmail() returns a value that relates to the Validate::PHONE_* constants (defined in Validator.inc.php).
        switch (Validator::validatePhone($phone, LOG_NOTICE, $file, $line)) {
        case Validator::PHONE_REGEX_FAIL:
            // Failed regex match.
            $this->addError($form_name, sprintf(_("The phone number <em>%s</em> is not valid."), oTxt($phone)), $type, $file, $line);
            $app->logMsg(sprintf('The phone number %s is not valid.', oTxt($phone)), LOG_DEBUG, __FILE__, __LINE__);
            return false;

        case Validator::PHONE_LENGTH_FAIL:
            // Failed length requirements.
            $this->addError($form_name, sprintf(_("The phone number <em>%s</em> is too long (phone number must have fewer than 25 characters)."), oTxt($phone)), $type, $file, $line);
            $app->logMsg(sprintf('The phone number %s must contain less than 25 characters.', oTxt($phone)), LOG_DEBUG, __FILE__, __LINE__);
            return false;

        case Validator::PHONE_SUCCESS:
        default :
            return true;
        }
    }

    /**
    * Verifies that date can be processed by the strtotime function.
    *
    * @param  string  $form_name the name of the incoming form variable
    * @param  string  $msg       the message to display on error
    * @param  const  $type  A LOG_* constant (see App->logMsg())
    * @param  const  $file  Filename to log (usually __FILE__)
    * @param  const  $line  Line number to log (usually __LINE__)
    * @return bool    true if no errors found, false otherwise
    */
    public function validateStrDate($form_name, $msg='', $type=MSG_ERR, $file=null, $line=null)
    {
        $app =& App::getInstance();

        if (Validator::validateStrDate(getFormData($form_name, ''), LOG_NOTICE, $file, $line)) {
            return true;
        } else {
            $this->addError($form_name, $msg, $type, $file, $line);
            $app->logMsg(sprintf('The string date %s is not valid.', getFormData($form_name)), LOG_DEBUG, __FILE__, __LINE__);
            return false;
        }
    }


    /**
    * Verifies credit card number using the Luhn (mod 10) algorithm.
    * http://en.wikipedia.org/wiki/Luhn_algorithm
    *
    * @param  string  $form_name   The name of the incoming form variable.
    * @param  string  $cc_type     Optional, card type to do specific checks. One of the Validator::CC_TYPE_* constants.
    * @param  const  $type  A LOG_* constant (see App->logMsg())
    * @param  const  $file  Filename to log (usually __FILE__)
    * @param  const  $line  Line number to log (usually __LINE__)
    * @return bool    true if no errors found, false otherwise
    */
    public function validateCCNumber($form_name, $cc_type=null, $type=MSG_ERR, $file=null, $line=null)
    {
        $cc_num = getFormData($form_name);

        if (Validator::validateCCNumber($cc_num, $cc_type, LOG_NOTICE, $file, $line)) {
            return true;
        } else {
            $this->addError($form_name, sprintf(_("The credit card number you entered is not valid. Please check the number and try again."), $cc_num), $type, $file, $line);
            return false;
        }
    }

    /**
    * Check whether a file was selected for uploading. If file is missing, it's an error.
    *
    * @param  string $form_name the name of the incoming form variable
    * @param  string $msg       the message to display on error
    * @param  const  $type  A LOG_* constant (see App->logMsg())
    * @param  const  $file  Filename to log (usually __FILE__)
    * @param  const  $line  Line number to log (usually __LINE__)
    * @return bool   true if no errors found, false otherwise
    */
    public function fileUploaded($form_name, $msg='', $type=MSG_ERR, $file=null, $line=null)
    {
        if (Validator::fileUploaded($form_name, LOG_NOTICE, $file, $line)) {
            return true;
        } else {
            $this->addError($form_name, $msg, $type, $file, $line);
            return false;
        }
    }
    /**
    * Check whether a file was selected for uploading. If file is missing, it's an error.
    *
    * @param  string $form_name the name of the incoming form variable
    * @param  string $msg       the message to display on error
    * @param  const  $type  A LOG_* constant (see App->logMsg())
    * @param  const  $file  Filename to log (usually __FILE__)
    * @param  const  $line  Line number to log (usually __LINE__)
    * @return bool   true if no errors found, false otherwise
    */
    public function fileUploadSize($form_name, $msg='', $type=MSG_ERR, $file=null, $line=null)
    {
        if (Validator::fileUploadSize($form_name, LOG_NOTICE, $file, $line)) {
            return true;
        } else {
            $msg = '' == $msg ? sprintf(_("Maximum filesize exceeded. Got %s, but limit is %s."), humanFileSize($_SERVER['CONTENT_LENGTH']), humanFileSize(phpIniGetBytes('upload_max_filesize'))) : $msg;
            $this->addError($form_name, $msg, $type, $file, $line);
            return false;
        }
    }

} // THE END