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<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\Validator;
class Callback extends AbstractValidator
{
/**
* 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 => "The input is not valid",
self::INVALID_CALLBACK => "An exception has been raised within the callback",
);
/**
* Default options to set for the validator
*
* @var mixed
*/
protected $options = array(
'callback' => null, // Callback in a call_user_func format, string || array
'callbackOptions' => array(), // Options for the callback
);
/**
* Constructor
*
* @param array|callable $options
*/
public function __construct($options = null)
{
if (is_callable($options)) {
$options = array('callback' => $options);
}
parent::__construct($options);
}
/**
* Returns the set callback
*
* @return mixed
*/
public function getCallback()
{
return $this->options['callback'];
}
/**
* Sets the callback
*
* @param string|array|callable $callback
* @return Callback Provides a fluent interface
* @throws Exception\InvalidArgumentException
*/
public function setCallback($callback)
{
if (!is_callable($callback)) {
throw new Exception\InvalidArgumentException('Invalid callback given');
}
$this->options['callback'] = $callback;
return $this;
}
/**
* Returns the set options for the callback
*
* @return mixed
*/
public function getCallbackOptions()
{
return $this->options['callbackOptions'];
}
/**
* Sets options for the callback
*
* @param mixed $options
* @return Callback Provides a fluent interface
*/
public function setCallbackOptions($options)
{
$this->options['callbackOptions'] = (array) $options;
return $this;
}
/**
* Returns true if and only if the set callback returns
* for the provided $value
*
* @param mixed $value
* @param mixed $context Additional context to provide to the callback
* @return bool
* @throws Exception\InvalidArgumentException
*/
public function isValid($value, $context = null)
{
$this->setValue($value);
$options = $this->getCallbackOptions();
$callback = $this->getCallback();
if (empty($callback)) {
throw new Exception\InvalidArgumentException('No callback given');
}
$args = array($value);
if (empty($options) && !empty($context)) {
$args[] = $context;
}
if (!empty($options) && empty($context)) {
$args = array_merge($args, $options);
}
if (!empty($options) && !empty($context)) {
$args[] = $context;
$args = array_merge($args, $options);
}
try {
if (!call_user_func_array($callback, $args)) {
$this->error(self::INVALID_VALUE);
return false;
}
} catch (\Exception $e) {
$this->error(self::INVALID_CALLBACK);
return false;
}
return true;
}
}