<?php

/**
 * Validation Class.  Used for validation of model data
 *
 * PHP versions 4 and 5
 *
 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
 * Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
 *
 * Licensed under The MIT License
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright     Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
 * @link          http://cakephp.org CakePHP(tm) Project
 * @package       cake
 * @subpackage    cake.cake.libs
 * @since         CakePHP(tm) v 1.2.0.3830
 * @license       MIT License (http://www.opensource.org/licenses/mit-license.php)
 */
//if (!class_exists('Multibyte')) {
//	App::import('Core', 'Multibyte', false);
//}
/**
 * Offers different validation methods.
 *
 * @package       cake
 * @subpackage    cake.cake.libs
 * @since         CakePHP v 1.2.0.3830
 */
//class Validation extends Object {
if ( ! class_exists( 'Toolset_CakePHP_Validation' ) ) {

    class Toolset_CakePHP_Validation {

        /**
         * Set the value of methods $check param.
         *
         * @var string
         * @access public
         */
        var $check = null;

        /**
         * Set to a valid regular expression in the class methods.
         * Can be set from $regex param also
         *
         * @var string
         * @access public
         */
        var $regex = null;

        /**
         * Some complex patterns needed in multiple places
         *
         * @var array
         * @access private
         */
        var $__pattern = array(
            'hostname' => '(?:[a-z0-9][-a-z0-9]*\.)*(?:[a-z0-9][-a-z0-9]{0,62})\.(?:(?:[a-z]{2}\.)?[a-z]{2,4}|museum|travel)'
        );

        /**
         * Some class methods use a country to determine proper validation.
         * This can be passed to methods in the $country param
         *
         * @var string
         * @access public
         */
        var $country = null;

        /**
         * Some class methods use a deeper validation when set to true
         *
         * @var string
         * @access public
         */
        var $deep = null;

        /**
         * Some class methods use the $type param to determine which validation to perfom in the method
         *
         * @var string
         * @access public
         */
        var $type = null;

        /**
         * Holds an array of errors messages set in this class.
         * These are used for debugging purposes
         *
         * @var array
         * @access public
         */
        var $errors = array();

        /**
         * Gets a reference to the Validation object instance
         *
         * @return object Validation instance
         * @access public
         * @static
         */
        function &getInstance() {
            static $instance = array();

            if (!$instance) {
                $instance[0] = new Toolset_CakePHP_Validation();
            }
            return $instance[0];
        }

        /**
         * Checks that a string contains something other than whitespace
         *
         * Returns true if string contains something other than whitespace
         *
         * $check can be passed as an array:
         * array('check' => 'valueToCheck');
         *
         * @param mixed $check Value to check
         * @return boolean Success
         * @access public
         */
        function notEmpty($check) {
            $_this = & Toolset_CakePHP_Validation::getInstance();
            $_this->__reset();
            $_this->check = $check;

            if (is_array($check)) {
                $_this->_extract($check);
            }

            if (empty($_this->check) && $_this->check != '0') {
                return false;
            }
            $_this->regex = '/[^\s]+/m';
            return $_this->_check();
        }

        /**
         * Checks that a string contains only integer or letters
         *
         * Returns true if string contains only integer or letters
         *
         * $check can be passed as an array:
         * array('check' => 'valueToCheck');
         *
         * @param mixed $check Value to check
         * @return boolean Success
         * @access public
         */
        function alphaNumeric($check) {
            $_this = & Toolset_CakePHP_Validation::getInstance();
            $_this->__reset();
            $_this->check = $check;

            if (is_array($check)) {
                $_this->_extract($check);
            }

            if (empty($_this->check) && $_this->check != '0') {
                return false;
            }
            $_this->regex = '/^[a-zA-Z0-9]*$/mu';
            $return = $_this->_check();

            if (!$return) {
                $_this->regex = '/^[\p{Ll}\p{Lm}\p{Lo}\p{Lt}\p{Lu}\p{Nd}]+$/mu';
                $return = $_this->_check();
            }

            return $_this->_check();
        }

        function alphaNumericWhitespaces($check) {
            $_this = & Toolset_CakePHP_Validation::getInstance();
            $_this->__reset();
            $_this->check = $check;

            if (is_array($check)) {
                $_this->_extract($check);
            }

            if (empty($_this->check) && $_this->check != '0') {
                return false;
            }
            $_this->regex = '/^[a-zA-Z0-9\s\-\_]*$/mu';
            $return = $_this->_check();

            if (!$return) {
                $_this->regex = '/^[\p{Ll}\p{Lm}\p{Lo}\p{Lt}\p{Lu}\p{Nd}\s\-\_]+$/mu';
                $return = $_this->_check();
            }

            return $return;
        }

        /**
         * Checks that a string length is within s specified range.
         * Spaces are included in the character count.
         * Returns true is string matches value min, max, or between min and max,
         *
         * @param string $check Value to check for length
         * @param integer $min Minimum value in range (inclusive)
         * @param integer $max Maximum value in range (inclusive)
         * @return boolean Success
         * @access public
         */
        function between($check, $min, $max) {
            $length = strlen($check);
            return ($length >= $min && $length <= $max);
        }

        /**
         * Returns true if field is left blank -OR- only whitespace characters are present in it's value
         * Whitespace characters include Space, Tab, Carriage Return, Newline
         *
         * $check can be passed as an array:
         * array('check' => 'valueToCheck');
         *
         * @param mixed $check Value to check
         * @return boolean Success
         * @access public
         */
        function blank($check) {
            $_this = & Toolset_CakePHP_Validation::getInstance();
            $_this->__reset();
            $_this->check = $check;

            if (is_array($check)) {
                $_this->_extract($check);
            }

            $_this->regex = '/[^\\s]/';
            return !$_this->_check();
        }

        /**
         * Validation of credit card numbers.
         * Returns true if $check is in the proper credit card format.
         *
         * @param mixed $check credit card number to validate
         * @param mixed $type 'all' may be passed as a sting, defaults to fast which checks format of most major credit cards
         *    if an array is used only the values of the array are checked.
         *    Example: array('amex', 'bankcard', 'maestro')
         * @param boolean $deep set to true this will check the Luhn algorithm of the credit card.
         * @param string $regex A custom regex can also be passed, this will be used instead of the defined regex values
         * @return boolean Success
         * @access public
         * @see Toolset_CakePHP_Validation::_luhn()
         */
        function cc($check, $type = 'fast', $deep = false, $regex = null) {
            $_this = & Toolset_CakePHP_Validation::getInstance();
            $_this->__reset();
            $_this->check = $check;
            $_this->type = $type;
            $_this->deep = $deep;
            $_this->regex = $regex;

            if (is_array($check)) {
                $_this->_extract($check);
            }
            $_this->check = str_replace(array('-', ' '), '', $_this->check);

            if (strlen($_this->check) < 13) {
                return false;
            }

            if (!is_null($_this->regex)) {
                if ($_this->_check()) {
                    return $_this->_luhn();
                }
            }
            $cards = array(
                'all' => array(
                    'amex' => '/^3[4|7]\\d{13}$/',
                    'bankcard' => '/^56(10\\d\\d|022[1-5])\\d{10}$/',
                    'diners' => '/^(?:3(0[0-5]|[68]\\d)\\d{11})|(?:5[1-5]\\d{14})$/',
                    'disc' => '/^(?:6011|650\\d)\\d{12}$/',
                    'electron' => '/^(?:417500|4917\\d{2}|4913\\d{2})\\d{10}$/',
                    'enroute' => '/^2(?:014|149)\\d{11}$/',
                    'jcb' => '/^(3\\d{4}|2100|1800)\\d{11}$/',
                    'maestro' => '/^(?:5020|6\\d{3})\\d{12}$/',
                    'mc' => '/^5[1-5]\\d{14}$/',
                    'solo' => '/^(6334[5-9][0-9]|6767[0-9]{2})\\d{10}(\\d{2,3})?$/',
                    'switch' => '/^(?:49(03(0[2-9]|3[5-9])|11(0[1-2]|7[4-9]|8[1-2])|36[0-9]{2})\\d{10}(\\d{2,3})?)|(?:564182\\d{10}(\\d{2,3})?)|(6(3(33[0-4][0-9])|759[0-9]{2})\\d{10}(\\d{2,3})?)$/',
                    'visa' => '/^4\\d{12}(\\d{3})?$/',
                    'voyager' => '/^8699[0-9]{11}$/'
                ),
                'fast' => '/^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|6011[0-9]{12}|3(?:0[0-5]|[68][0-9])[0-9]{11}|3[47][0-9]{13})$/'
            );

            if (is_array($_this->type)) {
                foreach ($_this->type as $value) {
                    $_this->regex = $cards['all'][strtolower($value)];

                    if ($_this->_check()) {
                        return $_this->_luhn();
                    }
                }
            } elseif ($_this->type == 'all') {
                foreach ($cards['all'] as $value) {
                    $_this->regex = $value;

                    if ($_this->_check()) {
                        return $_this->_luhn();
                    }
                }
            } else {
                $_this->regex = $cards['fast'];

                if ($_this->_check()) {
                    return $_this->_luhn();
                }
            }
        }

        /**
         * Used to compare 2 numeric values.
         *
         * @param mixed $check1 if string is passed for a string must also be passed for $check2
         *    used as an array it must be passed as array('check1' => value, 'operator' => 'value', 'check2' -> value)
         * @param string $operator Can be either a word or operand
         *    is greater >, is less <, greater or equal >=
         *    less or equal <=, is less <, equal to ==, not equal !=
         * @param integer $check2 only needed if $check1 is a string
         * @return boolean Success
         * @access public
         */
        function comparison($check1, $operator = null, $check2 = null) {
            if (is_array($check1)) {
                extract($check1, EXTR_OVERWRITE);
            }
            $operator = str_replace(array(' ', "\t", "\n", "\r", "\0", "\x0B"), '', strtolower($operator));

            switch ($operator) {
                case 'isgreater':
                case '>':
                    if ($check1 > $check2) {
                        return true;
                    }
                    break;
                case 'isless':
                case '<':
                    if ($check1 < $check2) {
                        return true;
                    }
                    break;
                case 'greaterorequal':
                case '>=':
                    if ($check1 >= $check2) {
                        return true;
                    }
                    break;
                case 'lessorequal':
                case '<=':
                    if ($check1 <= $check2) {
                        return true;
                    }
                    break;
                case 'equalto':
                case '==':
                    if ($check1 == $check2) {
                        return true;
                    }
                    break;
                case 'notequal':
                case '!=':
                    if ($check1 != $check2) {
                        return true;
                    }
                    break;
                default:
                    $_this = & Toolset_CakePHP_Validation::getInstance();
                    $_this->errors[] = __('You must define the $operator parameter for Toolset_CakePHP_Validation::comparison()', 'wpcf');
                    break;
            }
            return false;
        }

        /**
         * Used when a custom regular expression is needed.
         *
         * @param mixed $check When used as a string, $regex must also be a valid regular expression.
         * 								As and array: array('check' => value, 'regex' => 'valid regular expression')
         * @param string $regex If $check is passed as a string, $regex must also be set to valid regular expression
         * @return boolean Success
         * @access public
         */
        function custom($check, $regex = null) {
            $_this = & Toolset_CakePHP_Validation::getInstance();
            $_this->__reset();
            $_this->check = $check;
            $_this->regex = $regex;
            if (is_array($check)) {
                $_this->_extract($check);
            }
            if ($_this->regex === null) {
                $_this->errors[] = __('You must define a regular expression for Toolset_CakePHP_Validation::custom()', 'wpcf');
                return false;
            }
            return $_this->_check();
        }

        /**
         * Date validation, determines if the string passed is a valid date.
         * keys that expect full month, day and year will validate leap years
         *
         * @param string $check a valid date string
         * @param mixed $format Use a string or an array of the keys below. Arrays should be passed as array('dmy', 'mdy', etc)
         * 					Keys: dmy 27-12-2006 or 27-12-06 separators can be a space, period, dash, forward slash
         * 							mdy 12-27-2006 or 12-27-06 separators can be a space, period, dash, forward slash
         * 							ymd 2006-12-27 or 06-12-27 separators can be a space, period, dash, forward slash
         * 							dMy 27 December 2006 or 27 Dec 2006
         * 							Mdy December 27, 2006 or Dec 27, 2006 comma is optional
         * 							My December 2006 or Dec 2006
         * 							my 12/2006 separators can be a space, period, dash, forward slash
         * @param string $regex If a custom regular expression is used this is the only validation that will occur.
         * @return boolean Success
         * @access public
         */
        function date($check, $format = 'ymd', $regex = null) {

            $date_format = wpcf_get_date_format();
            $cake_date_formats = array(
                'F j, Y' => 'Mdy',
                'Y/m/d' => 'ymd',
                'm/d/Y' => 'mdy',
                'd/m/Y' => 'dmy',
                'd/m/y' => 'dmy',
            );

            $format = $cake_date_formats[$date_format];

            $_this = & Toolset_CakePHP_Validation::getInstance();
            $_this->__reset();
            $_this->check = $check;
            $_this->regex = $regex;

            if (!is_null($_this->regex)) {
                return $_this->_check();
            }

            $regex['dmy'] = '%^(?:(?:31(\\/|-|\\.|\\x20)(?:0?[13578]|1[02]))\\1|(?:(?:29|30)(\\/|-|\\.|\\x20)(?:0?[1,3-9]|1[0-2])\\2))(?:(?:1[6-9]|[2-9]\\d)?\\d{2})$|^(?:29(\\/|-|\\.|\\x20)0?2\\3(?:(?:(?:1[6-9]|[2-9]\\d)?(?:0[48]|[2468][048]|[13579][26])|(?:(?:16|[2468][048]|[3579][26])00))))$|^(?:0?[1-9]|1\\d|2[0-8])(\\/|-|\\.|\\x20)(?:(?:0?[1-9])|(?:1[0-2]))\\4(?:(?:1[6-9]|[2-9]\\d)?\\d{2})$%';
            $regex['mdy'] = '%^(?:(?:(?:0?[13578]|1[02])(\\/|-|\\.|\\x20)31)\\1|(?:(?:0?[13-9]|1[0-2])(\\/|-|\\.|\\x20)(?:29|30)\\2))(?:(?:1[6-9]|[2-9]\\d)?\\d{2})$|^(?:0?2(\\/|-|\\.|\\x20)29\\3(?:(?:(?:1[6-9]|[2-9]\\d)?(?:0[48]|[2468][048]|[13579][26])|(?:(?:16|[2468][048]|[3579][26])00))))$|^(?:(?:0?[1-9])|(?:1[0-2]))(\\/|-|\\.|\\x20)(?:0?[1-9]|1\\d|2[0-8])\\4(?:(?:1[6-9]|[2-9]\\d)?\\d{2})$%';
            $regex['ymd'] = '%^(?:(?:(?:(?:(?:1[6-9]|[2-9]\\d)?(?:0[48]|[2468][048]|[13579][26])|(?:(?:16|[2468][048]|[3579][26])00)))(\\/|-|\\.|\\x20)(?:0?2\\1(?:29)))|(?:(?:(?:1[6-9]|[2-9]\\d)?\\d{2})(\\/|-|\\.|\\x20)(?:(?:(?:0?[13578]|1[02])\\2(?:31))|(?:(?:0?[1,3-9]|1[0-2])\\2(29|30))|(?:(?:0?[1-9])|(?:1[0-2]))\\2(?:0?[1-9]|1\\d|2[0-8]))))$%';
            $regex['dMy'] = '/^((31(?!\\ (Feb(ruary)?|Apr(il)?|June?|(Sep(?=\\b|t)t?|Nov)(ember)?)))|((30|29)(?!\\ Feb(ruary)?))|(29(?=\\ Feb(ruary)?\\ (((1[6-9]|[2-9]\\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00)))))|(0?[1-9])|1\\d|2[0-8])\\ (Jan(uary)?|Feb(ruary)?|Ma(r(ch)?|y)|Apr(il)?|Ju((ly?)|(ne?))|Aug(ust)?|Oct(ober)?|(Sep(?=\\b|t)t?|Nov|Dec)(ember)?)\\ ((1[6-9]|[2-9]\\d)\\d{2})$/';
            $regex['Mdy'] = '/^(?:(((Jan(uary)?|Ma(r(ch)?|y)|Jul(y)?|Aug(ust)?|Oct(ober)?|Dec(ember)?)\\ 31)|((Jan(uary)?|Ma(r(ch)?|y)|Apr(il)?|Ju((ly?)|(ne?))|Aug(ust)?|Oct(ober)?|(Sept|Nov|Dec)(ember)?)\\ (0?[1-9]|([12]\\d)|30))|(Feb(ruary)?\\ (0?[1-9]|1\\d|2[0-8]|(29(?=,?\\ ((1[6-9]|[2-9]\\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00)))))))\\,?\\ ((1[6-9]|[2-9]\\d)\\d{2}))$/';
            $regex['My'] = '%^(Jan(uary)?|Feb(ruary)?|Ma(r(ch)?|y)|Apr(il)?|Ju((ly?)|(ne?))|Aug(ust)?|Oct(ober)?|(Sep(?=\\b|t)t?|Nov|Dec)(ember)?)[ /]((1[6-9]|[2-9]\\d)\\d{2})$%';
            $regex['my'] = '%^(((0[123456789]|10|11|12)([- /.])(([1][9][0-9][0-9])|([2][0-9][0-9][0-9]))))$%';

            $format = (is_array($format)) ? array_values($format) : array($format);
            foreach ($format as $key) {
                $_this->regex = $regex[$key];

                if ($_this->_check() === true) {
                    return true;
                }
            }
            return false;
        }

        /**
         * Time validation, determines if the string passed is a valid time.
         * Validates time as 24hr (HH:MM) or am/pm ([H]H:MM[a|p]m)
         * Does not allow/validate seconds.
         *
         * @param string $check a valid time string
         * @return boolean Success
         * @access public
         */
        function time($check) {
            $_this = & Toolset_CakePHP_Validation::getInstance();
            $_this->__reset();
            $_this->check = $check;
            $_this->regex = '%^((0?[1-9]|1[012])(:[0-5]\d){0,2}([AP]M|[ap]m))$|^([01]\d|2[0-3])(:[0-5]\d){0,2}$%';
            return $_this->_check();
        }

        /**
         * Boolean validation, determines if value passed is a boolean integer or true/false.
         *
         * @param string $check a valid boolean
         * @return boolean Success
         * @access public
         */
        function boolean($check) {
            $booleanList = array(0, 1, '0', '1', true, false);
            return in_array($check, $booleanList, true);
        }

        /**
         * Checks that a value is a valid decimal. If $places is null, the $check is allowed to be a scientific float
         * If no decimal point is found a false will be returned. Both the sign and exponent are optional.
         *
         * @param integer $check The value the test for decimal
         * @param integer $places if set $check value must have exactly $places after the decimal point
         * @param string $regex If a custom regular expression is used this is the only validation that will occur.
         * @return boolean Success
         * @access public
         */
        function decimal($check, $places = null, $regex = null) {
            $_this = & Toolset_CakePHP_Validation::getInstance();
            $_this->__reset();
            $_this->regex = $regex;
            $_this->check = $check;

            if (is_null($_this->regex)) {
                if (is_null($places)) {
                    $_this->regex = '/^[-+]?[0-9]*\\.{1}[0-9]+(?:[eE][-+]?[0-9]+)?$/';
                } else {
                    $_this->regex = '/^[-+]?[0-9]*\\.{1}[0-9]{' . $places . '}$/';
                }
            }
            return $_this->_check();
        }

        /**
         * Validates for an email address.
         *
         * @param string $check Value to check
         * @param boolean $deep Perform a deeper validation (if true), by also checking availability of host
         * @param string $regex Regex to use (if none it will use built in regex)
         * @return boolean Success
         * @access public
         */
        function email($check, $deep = false, $regex = null) {
            $_this = & Toolset_CakePHP_Validation::getInstance();
            $_this->__reset();
            $_this->check = $check;
            $_this->regex = $regex;
            $_this->deep = $deep;

            if (is_array($check)) {
                $_this->_extract($check);
            }

            if (is_null($_this->regex)) {
                $_this->regex = '/^[a-z0-9!#$%&\'*+\/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&\'*+\/=?^_`{|}~-]+)*@' . $_this->__pattern['hostname'] . '$/i';
            }
            $return = $_this->_check();

            if ($_this->deep === false || $_this->deep === null) {
                return $return;
            }

            if ($return === true && preg_match('/@(' . $_this->__pattern['hostname'] . ')$/i', $_this->check, $regs)) {
                if (function_exists('getmxrr') && getmxrr($regs[1], $mxhosts)) {
                    return true;
                }
                if (function_exists('checkdnsrr') && checkdnsrr($regs[1], 'MX')) {
                    return true;
                }
                return is_array(gethostbynamel($regs[1]));
            }
            return false;
        }

        /**
         * Check that value is exactly $comparedTo.
         *
         * @param mixed $check Value to check
         * @param mixed $comparedTo Value to compare
         * @return boolean Success
         * @access public
         */
        function equalTo($check, $comparedTo) {
            return ($check === $comparedTo);
        }

        /**
         * Check that value has a valid file extension.
         *
         * @param mixed $check Value to check
         * @param array $extensions file extenstions to allow
         * @return boolean Success
         * @access public
         */
        function extension($check, $extensions = array('gif', 'jpeg', 'png', 'jpg')) {
            if (is_array($check)) {
                return Toolset_CakePHP_Validation::extension(array_shift($check), $extensions);
            }
            $extension = strtolower(array_pop(explode('.', $check)));
            foreach ($extensions as $value) {
                if ($extension == strtolower($value)) {
                    return true;
                }
            }
            return false;
        }

        /**
         * Validation of an IP address.
         *
         * Valid IP version strings for type restriction are:
         * - both: Check both IPv4 and IPv6, return true if the supplied address matches either version
         * - IPv4: Version 4 (Eg: 127.0.0.1, 192.168.10.123, 203.211.24.8)
         * - IPv6: Version 6 (Eg: ::1, 2001:0db8::1428:57ab)
         *
         * @param string $check The string to test.
         * @param string $type The IP Version to test against
         * @return boolean Success
         * @access public
         */
        function ip($check, $type = 'both') {
            $_this = & Toolset_CakePHP_Validation::getInstance();
            $success = false;
            $type = strtolower($type);
            if ($type === 'ipv4' || $type === 'both') {
                $success |= $_this->_ipv4($check);
            }
            if ($type === 'ipv6' || $type === 'both') {
                $success |= $_this->_ipv6($check);
            }
            return $success;
        }

        /**
         * Validation of IPv4 addresses.
         *
         * @param string $check IP Address to test
         * @return boolean Success
         * @access protected
         */
        function _ipv4($check) {
            if (function_exists('filter_var')) {
                return filter_var($check, FILTER_VALIDATE_IP, array('flags' => FILTER_FLAG_IPV4)) !== false;
            }
            $this->__populateIp();
            $this->check = $check;
            $this->regex = '/^' . $this->__pattern['IPv4'] . '$/';
            return $this->_check();
        }

        /**
         * Validation of IPv6 addresses.
         *
         * @param string $check IP Address to test
         * @return boolean Success
         * @access protected
         */
        function _ipv6($check) {
            if (function_exists('filter_var')) {
                return filter_var($check, FILTER_VALIDATE_IP, array('flags' => FILTER_FLAG_IPV6)) !== false;
            }
            $this->__populateIp();
            $this->check = $check;
            $this->regex = '/^' . $this->__pattern['IPv6'] . '$/';
            return $this->_check();
        }

        /**
         * Checks whether the length of a string is greater or equal to a minimal length.
         *
         * @param string $check The string to test
         * @param integer $min The minimal string length
         * @return boolean Success
         * @access public
         */
        function minLength($check, $min) {
            $length = strlen($check);
            return ($length >= $min);
        }

        /**
         * Checks whether the length of a string is smaller or equal to a maximal length..
         *
         * @param string $check The string to test
         * @param integer $max The maximal string length
         * @return boolean Success
         * @access public
         */
        function maxLength($check, $max) {
            $length = strlen($check);
            return ($length <= $max);
        }

        /**
         * Checks that a value is a monetary amount.
         *
         * @param string $check Value to check
         * @param string $symbolPosition Where symbol is located (left/right)
         * @return boolean Success
         * @access public
         */
        function money($check, $symbolPosition = 'left') {
            $_this = & Toolset_CakePHP_Validation::getInstance();
            $_this->check = $check;

            if ($symbolPosition == 'right') {
                $_this->regex = '/^(?!0,?\d)(?:\d{1,3}(?:([, .])\d{3})?(?:\1\d{3})*|(?:\d+))((?!\1)[,.]\d{2})?(?<!\x{00a2})\p{Sc}?$/u';
            } else {
                $_this->regex = '/^(?!\x{00a2})\p{Sc}?(?!0,?\d)(?:\d{1,3}(?:([, .])\d{3})?(?:\1\d{3})*|(?:\d+))((?!\1)[,.]\d{2})?$/u';
            }
            return $_this->_check();
        }

        /**
         * Validate a multiple select.
         *
         * Valid Options
         *
         * - in => provide a list of choices that selections must be made from
         * - max => maximun number of non-zero choices that can be made
         * - min => minimum number of non-zero choices that can be made
         *
         * @param mixed $check Value to check
         * @param mixed $options Options for the check.
         * @return boolean Success
         * @access public
         */
        function multiple($check, $options = array()) {
            $defaults = array('in' => null, 'max' => null, 'min' => null);
            $options = array_merge($defaults, $options);
            $check = array_filter((array) $check);
            if (empty($check)) {
                return false;
            }
            if ($options['max'] && count($check) > $options['max']) {
                return false;
            }
            if ($options['min'] && count($check) < $options['min']) {
                return false;
            }
            if ($options['in'] && is_array($options['in'])) {
                foreach ($check as $val) {
                    if (!in_array($val, $options['in'])) {
                        return false;
                    }
                }
            }
            return true;
        }

        /**
         * Checks if a value is numeric.
         *
         * @param string $check Value to check
         * @return boolean Succcess
         * @access public
         */
        function numeric($check) {
            return is_numeric($check);
        }

        /**
         * Checks if a value is integer.
         *
         * @param string $check Value to check
         * @return boolean Succcess
         * @access public
         */
        function integer($check) {
            return is_int(intval($check));
        }
        
        /**
         * Checks if a value is valid hexadecimal.
         *
         * @param string $check Value to check
         * @return boolean Succcess
         * @access public
         */
        function hexadecimal($check) {
            return preg_match('/^#[a-f0-9]{6}$/i', $check);
        }

        /**
         * Check that a value is a valid phone number.
         *
         * @param mixed $check Value to check (string or array)
         * @param string $regex Regular expression to use
         * @param string $country Country code (defaults to 'all')
         * @return boolean Success
         * @access public
         */
        function phone($check, $regex = null, $country = 'all') {
            $_this = & Toolset_CakePHP_Validation::getInstance();
            $_this->check = $check;
            $_this->regex = $regex;
            $_this->country = $country;
            if (is_array($check)) {
                $_this->_extract($check);
            }

            if (is_null($_this->regex)) {
                switch ($_this->country) {
                    case 'us':
                    case 'all':
                    case 'can':
                        // includes all NANPA members. see http://en.wikipedia.org/wiki/North_American_Numbering_Plan#List_of_NANPA_countries_and_territories
                        $_this->regex = '/^(?:\+?1)?[-. ]?\\(?[2-9][0-8][0-9]\\)?[-. ]?[2-9][0-9]{2}[-. ]?[0-9]{4}$/';
                        break;
                }
            }
            if (empty($_this->regex)) {
                return $_this->_pass('phone', $check, $country);
            }
            return $_this->_check();
        }

        /**
         * Checks that a given value is a valid postal code.
         *
         * @param mixed $check Value to check
         * @param string $regex Regular expression to use
         * @param string $country Country to use for formatting
         * @return boolean Success
         * @access public
         */
        function postal($check, $regex = null, $country = null) {
            $_this = & Toolset_CakePHP_Validation::getInstance();
            $_this->check = $check;
            $_this->regex = $regex;
            $_this->country = $country;
            if (is_array($check)) {
                $_this->_extract($check);
            }
            if (empty($country)) {
                $_this->country = 'us';
            }

            if (is_null($_this->regex)) {
                switch ($_this->country) {
                    case 'uk':
                        $_this->regex = '/\\A\\b[A-Z]{1,2}[0-9][A-Z0-9]? [0-9][ABD-HJLNP-UW-Z]{2}\\b\\z/i';
                        break;
                    case 'ca':
                        $_this->regex = '/\\A\\b[ABCEGHJKLMNPRSTVXY][0-9][A-Z] ?[0-9][A-Z][0-9]\\b\\z/i';
                        break;
                    case 'it':
                    case 'de':
                        $_this->regex = '/^[0-9]{5}$/i';
                        break;
                    case 'be':
                        $_this->regex = '/^[1-9]{1}[0-9]{3}$/i';
                        break;
                    case 'us':
                        $_this->regex = '/\\A\\b[0-9]{5}(?:-[0-9]{4})?\\b\\z/i';
                        break;
                }
            }
            if (empty($_this->regex)) {
                return $_this->_pass('postal', $check, $country);
            }
            return $_this->_check();
        }

        /**
         * Validate that a number is in specified range.
         * if $lower and $upper are not set, will return true if
         * $check is a legal finite on this platform
         *
         * @param string $check Value to check
         * @param integer $lower Lower limit
         * @param integer $upper Upper limit
         * @return boolean Success
         * @access public
         */
        function range($check, $lower = null, $upper = null) {
            if (!is_numeric($check)) {
                return false;
            }
            if (isset($lower) && isset($upper)) {
                return ($check > $lower && $check < $upper);
            }
            return is_finite($check);
        }

        /**
         * Checks that a value is a valid Social Security Number.
         *
         * @param mixed $check Value to check
         * @param string $regex Regular expression to use
         * @param string $country Country
         * @return boolean Success
         * @access public
         */
        function ssn($check, $regex = null, $country = null) {
            $_this = & Toolset_CakePHP_Validation::getInstance();
            $_this->check = $check;
            $_this->regex = $regex;
            $_this->country = $country;
            if (is_array($check)) {
                $_this->_extract($check);
            }

            if (is_null($_this->regex)) {
                switch ($_this->country) {
                    case 'dk':
                        $_this->regex = '/\\A\\b[0-9]{6}-[0-9]{4}\\b\\z/i';
                        break;
                    case 'nl':
                        $_this->regex = '/\\A\\b[0-9]{9}\\b\\z/i';
                        break;
                    case 'us':
                        $_this->regex = '/\\A\\b[0-9]{3}-[0-9]{2}-[0-9]{4}\\b\\z/i';
                        break;
                }
            }
            if (empty($_this->regex)) {
                return $_this->_pass('ssn', $check, $country);
            }
            return $_this->_check();
        }

        /**
         * Checks that a value is a valid uuid - http://tools.ietf.org/html/rfc4122
         * 
         * @param string $check Value to check
         * @return boolean Success
         * @access public
         */
        function uuid($check) {
            $_this = & Toolset_CakePHP_Validation::getInstance();
            $_this->check = $check;
            $_this->regex = '/^[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}$/i';
            return $_this->_check();
        }

        /**
         * Checks that a value is a valid URL according to http://www.w3.org/Addressing/URL/url-spec.txt
         *
         * The regex checks for the following component parts:
         *
         * - a valid, optional, scheme
         * - a valid ip address OR
         *   a valid domain name as defined by section 2.3.1 of http://www.ietf.org/rfc/rfc1035.txt
         *   with an optional port number
         * - an optional valid path
         * - an optional query string (get parameters)
         * - an optional fragment (anchor tag)
         *
         * @param string $check Value to check
         * @param boolean $strict Require URL to be prefixed by a valid scheme (one of http(s)/ftp(s)/file/news/gopher)
         * @return boolean Success
         * @access public
         */
        function url($check, $strict = false) {
            $_this = & Toolset_CakePHP_Validation::getInstance();
            $_this->__populateIp();
            $_this->check = $check;
            $validChars = '([' . preg_quote('!"$&\'()*+,-.@_:;=~[]') . '\/0-9a-z\p{L}\p{N}]|(%[0-9a-f]{2}))';
            $_this->regex = '/^(?:(?:https?|ftps?|file|news|gopher):\/\/)' . (!empty($strict) ? '' : '?') .
                    '(?:' . $_this->__pattern['IPv4'] . '|\[' . $_this->__pattern['IPv6'] . '\]|' . $_this->__pattern['hostname'] . ')' .
                    '(?::[1-9][0-9]{0,4})?' .
                    '(?:\/?|\/' . $validChars . '*)?' .
                    '(?:\?' . $validChars . '*)?' .
                    '(?:#' . $validChars . '*)?$/iu';
            return $_this->_check();
        }

        /**
         * Checks if a value is in a given list.
         *
         * @param string $check Value to check
         * @param array $list List to check against
         * @return boolean Succcess
         * @access public
         */
        function inList($check, $list) {
            return in_array($check, $list);
        }

        /**
         * Runs an user-defined validation.
         *
         * @param mixed $check value that will be validated in user-defined methods.
         * @param object $object class that holds validation method
         * @param string $method class method name for validation to run
         * @param array $args arguments to send to method
         * @return mixed user-defined class class method returns
         * @access public
         */
        function userDefined($check, $object, $method, $args = null) {
            return call_user_func_array(array(&$object, $method), array($check, $args));
        }

        function noSpecialChars($check) {
            return preg_match('#[^a-zA-Z0-9\s\_\-]#', $check) ? false : true;
        }

        function rewriteSlug($check) {
            return preg_match('#[^a-zA-Z0-9\s\_\-\%]#', $check) ? false : true;
        }

        /**
         * Attempts to pass unhandled Validation locales to a class starting with $classPrefix
         * and ending with Validation.  For example $classPrefix = 'nl', the class would be
         * `NlValidation`.
         *
         * @param string $method The method to call on the other class.
         * @param mixed $check The value to check or an array of parameters for the method to be called.
         * @param string $classPrefix The prefix for the class to do the validation.
         * @return mixed Return of Passed method, false on failure
         * @access protected
         * */
        function _pass($method, $check, $classPrefix) {
            $className = ucwords($classPrefix) . 'Validation';
            if (!class_exists($className)) {
                trigger_error(sprintf(__('Could not find %s class, unable to complete validation.', true), $className), E_USER_WARNING);
                return false;
            }
            if (!is_callable(array($className, $method))) {
                trigger_error(sprintf(__('Method %s does not exist on %s unable to complete validation.', true), $method, $className), E_USER_WARNING);
                return false;
            }
            $check = (array) $check;
            return call_user_func_array(array($className, $method), $check);
        }

        /**
         * Runs a regular expression match.
         *
         * @return boolean Success of match
         * @access protected
         */
        function _check() {
            $_this = & Toolset_CakePHP_Validation::getInstance();
            if (preg_match($_this->regex, $_this->check)) {
                $_this->error[] = false;
                return true;
            } else {
                $_this->error[] = true;
                return false;
            }
        }

        /**
         * Get the values to use when value sent to validation method is
         * an array.
         *
         * @param array $params Parameters sent to validation method
         * @return void
         * @access protected
         */
        function _extract($params) {
            $_this = & Toolset_CakePHP_Validation::getInstance();
            extract($params, EXTR_OVERWRITE);

            if (isset($check)) {
                $_this->check = $check;
            }
            if (isset($regex)) {
                $_this->regex = $regex;
            }
            if (isset($country)) {
                $_this->country = strtolower($country);
            }
            if (isset($deep)) {
                $_this->deep = $deep;
            }
            if (isset($type)) {
                $_this->type = $type;
            }
        }

        /**
         * Luhn algorithm
         *
         * @see http://en.wikipedia.org/wiki/Luhn_algorithm
         * @return boolean Success
         * @access protected
         */
        function _luhn() {
            $_this = & Toolset_CakePHP_Validation::getInstance();
            if ($_this->deep !== true) {
                return true;
            }
            if ($_this->check == 0) {
                return false;
            }
            $sum = 0;
            $length = strlen($_this->check);

            for ($position = 1 - ($length % 2); $position < $length; $position += 2) {
                $sum += $_this->check[$position];
            }

            for ($position = ($length % 2); $position < $length; $position += 2) {
                $number = $_this->check[$position] * 2;
                $sum += ($number < 10) ? $number : $number - 9;
            }

            return ($sum % 10 == 0);
        }

        /*
         * Lazily popualate the IP address patterns used for validations
         *
         * @return void
         * @access private
         */

        function __populateIp() {
            if (!isset($this->__pattern['IPv6'])) {
                $pattern = '((([0-9A-Fa-f]{1,4}:){7}(([0-9A-Fa-f]{1,4})|:))|(([0-9A-Fa-f]{1,4}:){6}';
                $pattern .= '(:|((25[0-5]|2[0-4]\d|[01]?\d{1,2})(\.(25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})';
                $pattern .= '|(:[0-9A-Fa-f]{1,4})))|(([0-9A-Fa-f]{1,4}:){5}((:((25[0-5]|2[0-4]\d|[01]?\d{1,2})';
                $pattern .= '(\.(25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|((:[0-9A-Fa-f]{1,4}){1,2})))|(([0-9A-Fa-f]{1,4}:)';
                $pattern .= '{4}(:[0-9A-Fa-f]{1,4}){0,1}((:((25[0-5]|2[0-4]\d|[01]?\d{1,2})(\.(25[0-5]|2[0-4]\d|[01]?\d{1,2}))';
                $pattern .= '{3})?)|((:[0-9A-Fa-f]{1,4}){1,2})))|(([0-9A-Fa-f]{1,4}:){3}(:[0-9A-Fa-f]{1,4}){0,2}';
                $pattern .= '((:((25[0-5]|2[0-4]\d|[01]?\d{1,2})(\.(25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|';
                $pattern .= '((:[0-9A-Fa-f]{1,4}){1,2})))|(([0-9A-Fa-f]{1,4}:){2}(:[0-9A-Fa-f]{1,4}){0,3}';
                $pattern .= '((:((25[0-5]|2[0-4]\d|[01]?\d{1,2})(\.(25[0-5]|2[0-4]\d|[01]?\d{1,2}))';
                $pattern .= '{3})?)|((:[0-9A-Fa-f]{1,4}){1,2})))|(([0-9A-Fa-f]{1,4}:)(:[0-9A-Fa-f]{1,4})';
                $pattern .= '{0,4}((:((25[0-5]|2[0-4]\d|[01]?\d{1,2})(\.(25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)';
                $pattern .= '|((:[0-9A-Fa-f]{1,4}){1,2})))|(:(:[0-9A-Fa-f]{1,4}){0,5}((:((25[0-5]|2[0-4]';
                $pattern .= '\d|[01]?\d{1,2})(\.(25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|((:[0-9A-Fa-f]{1,4})';
                $pattern .= '{1,2})))|(((25[0-5]|2[0-4]\d|[01]?\d{1,2})(\.(25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})))(%.+)?';

                $this->__pattern['IPv6'] = $pattern;
            }
            if (!isset($this->__pattern['IPv4'])) {
                $pattern = '(?:(?:25[0-5]|2[0-4][0-9]|(?:(?:1[0-9])?|[1-9]?)[0-9])\.){3}(?:25[0-5]|2[0-4][0-9]|(?:(?:1[0-9])?|[1-9]?)[0-9])';
                $this->__pattern['IPv4'] = $pattern;
            }
        }

        /**
         * Reset internal variables for another validation run.
         *
         * @return void
         * @access private
         */
        function __reset() {
            $this->check = null;
            $this->regex = null;
            $this->country = null;
            $this->deep = null;
            $this->type = null;
            $this->error = array();
            $this->errors = array();
        }

    }

}
