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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_Callback extends Zend_Validate_Abstract
 {
     /**
      * Invalid callback
      */
     const INVALID_CALLBACK = 'callbackInvalid';
 
     /**
      * Invalid value
      */
     const INVALID_VALUE = 'callbackValue';
 
     /**
      * Validation failure message template definitions
      *
      * @var array
      */
     protected $_messageTemplates = array(
         self::INVALID_VALUE    => "'%value%' is not valid",
         self::INVALID_CALLBACK => "An exception has been raised within the callback",
     );
 
     /**
      * Callback in a call_user_func format
      *
      * @var string|array
      */
     protected $_callback = null;
 
     /**
      * Default options to set for the filter
      *
      * @var mixed
      */
     protected $_options = array();
 
     /**
      * Sets validator options
      *
      * @param  mixed $callback
      * @throws Zend_Validate_Exception
      */
     public function __construct($callback = null)
     {
         if (is_callable($callback)) {
             $this->setCallback($callback);
         } elseif (is_array($callback)) {
             if (isset($callback['callback'])) {
                 $this->setCallback($callback['callback']);
             }
             if (isset($callback['options'])) {
                 $this->setOptions($callback['options']);
             }
         }
 
         if (null === ($initializedCallack = $this->getCallback())) {
             // require_once 'Zend/Validate/Exception.php';
             throw new Zend_Validate_Exception('No callback registered');
         }
     }
 
     /**
      * Returns the set callback
      *
      * @return mixed
      */
     public function getCallback()
     {
         return $this->_callback;
     }
 
     /**
      * Sets the callback
      *
      * @param  string|array $callback
      * @throws Zend_Validate_Exception
      * @return Zend_Validate_Callback Provides a fluent interface
      */
     public function setCallback($callback)
     {
         if (!is_callable($callback)) {
             // require_once 'Zend/Validate/Exception.php';
             throw new Zend_Validate_Exception('Invalid callback given');
         }
         $this->_callback = $callback;
         return $this;
     }
 
     /**
      * Returns the set options for the callback
      *
      * @return mixed
      */
     public function getOptions()
     {
         return $this->_options;
     }
 
     /**
      * Sets options for the callback
      *
      * @param  mixed $options
      * @return Zend_Validate_Callback Provides a fluent interface
      */
     public function setOptions($options)
     {
         $this->_options = (array) $options;
         return $this;
     }
 
     /**
      * Defined by Zend_Validate_Interface
      *
      * Returns true if and only if the set callback returns
      * for the provided $value
      *
      * @param  mixed $value
      * @return boolean
      */
     public function isValid($value)
     {
         $this->_setValue($value);
 
         $options  = $this->getOptions();
         $callback = $this->getCallback();
         $args     = func_get_args();
         $options  = array_merge($args, $options);
 
         try {
             if (!call_user_func_array($callback, $options)) {
                 $this->_error(self::INVALID_VALUE);
                 return false;
             }
         } catch (Exception $e) {
             $this->_error(self::INVALID_CALLBACK);
             return false;
         }
 
         return true;
     }
 }