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 <?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) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 /**
  * @see Zend_Validate_Abstract
  */
 // require_once 'Zend/Validate/Abstract.php';
 
 /**
  * @category   Zend
  * @package    Zend_Validate
  * @copyright  Copyright (c) 2005-2015 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|array|Zend_Config $options OPTIONAL
      */
     public function __construct($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;
     }
 }