<?php

/**

 * Zend Framework

 *

 * LICENSE

 *

 * This source file is subject to the new BSD license that is bundled

 * with this package in the file LICENSE.txt.

 * It is also available through the world-wide-web at this URL:

 * http://framework.zend.com/license/new-bsd

 * If you did not receive a copy of the license and are unable to

 * obtain it through the world-wide-web, please send an email

 * to license@zend.com so we can send you a copy immediately.

 *

 * @category   Zend

 * @package    Zend_Validate

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 * @version    $Id: Date.php 22668 2010-07-25 14:50:46Z thomas $

 */

/**

 * @see Zend_Validate_Abstract

 */

require_once 'Zend/Validate/Abstract.php';

/**

 * @category   Zend

 * @package    Zend_Validate

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

class Zend_Validate_Date extends Zend_Validate_Abstract

{

    const INVALID        = 'dateInvalid';

    const INVALID_DATE   = 'dateInvalidDate';

    const FALSEFORMAT    = 'dateFalseFormat';

    /**

     * Validation failure message template definitions

     *

     * @var array

     */

    protected $_messageTemplates = array(

        self::INVALID        => "Invalid type given. String, integer, array or Zend_Date expected",

        self::INVALID_DATE   => "'%value%' does not appear to be a valid date",

        self::FALSEFORMAT    => "'%value%' does not fit the date format '%format%'",

    );

    /**

     * @var array

     */

    protected $_messageVariables = array(

        'format'  => '_format'

    );

    /**

     * Optional format

     *

     * @var string|null

     */

    protected $_format;

    /**

     * Optional locale

     *

     * @var string|Zend_Locale|null

     */

    protected $_locale;

    /**

     * Sets validator options

     *

     * @param  string|Zend_Config $options OPTIONAL

     * @return void

     */

    public function __construct($options = array())

    {

        if ($options instanceof Zend_Config) {

            $options = $options->toArray();

        } else if (!is_array($options)) {

            $options = func_get_args();

            $temp['format'] = array_shift($options);

            if (!empty($options)) {

                $temp['locale'] = array_shift($options);

            }

            $options = $temp;

        }

        if (array_key_exists('format', $options)) {

            $this->setFormat($options['format']);

        }

        if (!array_key_exists('locale', $options)) {

            require_once 'Zend/Registry.php';

            if (Zend_Registry::isRegistered('Zend_Locale')) {

                $options['locale'] = Zend_Registry::get('Zend_Locale');

            }

        }

        if (array_key_exists('locale', $options)) {

            $this->setLocale($options['locale']);

        }

    }

    /**

     * Returns the locale option

     *

     * @return string|Zend_Locale|null

     */

    public function getLocale()

    {

        return $this->_locale;

    }

    /**

     * Sets the locale option

     *

     * @param  string|Zend_Locale $locale

     * @return Zend_Validate_Date provides a fluent interface

     */

    public function setLocale($locale = null)

    {

        require_once 'Zend/Locale.php';

        $this->_locale = Zend_Locale::findLocale($locale);

        return $this;

    }

    /**

     * Returns the locale option

     *

     * @return string|null

     */

    public function getFormat()

    {

        return $this->_format;

    }

    /**

     * Sets the format option

     *

     * @param  string $format

     * @return Zend_Validate_Date provides a fluent interface

     */

    public function setFormat($format = null)

    {

        $this->_format = $format;

        return $this;

    }

    /**

     * Defined by Zend_Validate_Interface

     *

     * Returns true if $value is a valid date of the format YYYY-MM-DD

     * If optional $format or $locale is set the date format is checked

     * according to Zend_Date, see Zend_Date::isDate()

     *

     * @param  string|array|Zend_Date $value

     * @return boolean

     */

    public function isValid($value)

    {

        if (!is_string($value) && !is_int($value) && !is_float($value) &&

            !is_array($value) && !($value instanceof Zend_Date)) {

            $this->_error(self::INVALID);

            return false;

        }

        $this->_setValue($value);

        if (($this->_format !== null) || ($this->_locale !== null) || is_array($value) ||

             $value instanceof Zend_Date) {

            require_once 'Zend/Date.php';

            if (!Zend_Date::isDate($value, $this->_format, $this->_locale)) {

                if ($this->_checkFormat($value) === false) {

                    $this->_error(self::FALSEFORMAT);

                } else {

                    $this->_error(self::INVALID_DATE);

                }

                return false;

            }

        } else {

            if (!preg_match('/^\d{4}-\d{2}-\d{2}$/', $value)) {

                $this->_format = 'yyyy-MM-dd';

                $this->_error(self::FALSEFORMAT);

                $this->_format = null;

                return false;

            }

            list($year, $month, $day) = sscanf($value, '%d-%d-%d');

            if (!checkdate($month, $day, $year)) {

                $this->_error(self::INVALID_DATE);

                return false;

            }

        }

        return true;

    }

    /**

     * Check if the given date fits the given format

     *

     * @param  string $value  Date to check

     * @return boolean False when date does not fit the format

     */

    private function _checkFormat($value)

    {

        try {

            require_once 'Zend/Locale/Format.php';

            $parsed = Zend_Locale_Format::getDate($value, array(

                                                  'date_format' => $this->_format, 'format_type' => 'iso',

                                                  'fix_date' => false));

            if (isset($parsed['year']) and ((strpos(strtoupper($this->_format), 'YY') !== false) and

                (strpos(strtoupper($this->_format), 'YYYY') === false))) {

                $parsed['year'] = Zend_Date::getFullYear($parsed['year']);

            }

        } catch (Exception $e) {

            // Date can not be parsed

            return false;

        }

        if (((strpos($this->_format, 'Y') !== false) or (strpos($this->_format, 'y') !== false)) and

            (!isset($parsed['year']))) {

            // Year expected but not found

            return false;

        }

        if ((strpos($this->_format, 'M') !== false) and (!isset($parsed['month']))) {

            // Month expected but not found

            return false;

        }

        if ((strpos($this->_format, 'd') !== false) and (!isset($parsed['day']))) {

            // Day expected but not found

            return false;

        }

        if (((strpos($this->_format, 'H') !== false) or (strpos($this->_format, 'h') !== false)) and

            (!isset($parsed['hour']))) {

            // Hour expected but not found

            return false;

        }

        if ((strpos($this->_format, 'm') !== false) and (!isset($parsed['minute']))) {

            // Minute expected but not found

            return false;

        }

        if ((strpos($this->_format, 's') !== false) and (!isset($parsed['second']))) {

            // Second expected  but not found

            return false;

        }

        // Date fits the format

        return true;

    }

}