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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_Form
* @subpackage Element
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Captcha.php 17616 2009-08-15 03:28:29Z yoshida@zend.co.jp $
*/
/** @see Zend_Form_Element_Xhtml */
require_once 'Zend/Form/Element/Xhtml.php';
/** @see Zend_Captcha_Adapter */
require_once 'Zend/Captcha/Adapter.php';
/**
* Generic captcha element
*
* This element allows to insert CAPTCHA into the form in order
* to validate that human is submitting the form. The actual
* logic is contained in the captcha adapter.
*
* @see http://en.wikipedia.org/wiki/Captcha
*
* @category Zend
* @package Zend_Form
* @subpackage Element
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Form_Element_Captcha extends Zend_Form_Element_Xhtml
{
/**
* Captcha plugin type constant
*/
const CAPTCHA = 'CAPTCHA';
/**
* Captcha adapter
*
* @var Zend_Captcha_Adapter
*/
protected $_captcha;
/**
* Get captcha adapter
*
* @return Zend_Captcha_Adapter
*/
public function getCaptcha()
{
return $this->_captcha;
}
/**
* Set captcha adapter
*
* @param string|array|Zend_Captcha_Adapter $captcha
* @param array $options
*/
public function setCaptcha($captcha, $options = array())
{
if ($captcha instanceof Zend_Captcha_Adapter) {
$instance = $captcha;
} else {
if (is_array($captcha)) {
if (array_key_exists('captcha', $captcha)) {
$name = $captcha['captcha'];
unset($captcha['captcha']);
} else {
$name = array_shift($captcha);
}
$options = array_merge($options, $captcha);
} else {
$name = $captcha;
}
$name = $this->getPluginLoader(self::CAPTCHA)->load($name);
if (empty($options)) {
$instance = new $name;
} else {
$r = new ReflectionClass($name);
if ($r->hasMethod('__construct')) {
$instance = $r->newInstanceArgs(array($options));
} else {
$instance = $r->newInstance();
}
}
}
$this->_captcha = $instance;
$this->_captcha->setName($this->getName());
return $this;
}
/**
* Constructor
*
* $spec may be:
* - string: name of element
* - array: options with which to configure element
* - Zend_Config: Zend_Config with options for configuring element
*
* @param string|array|Zend_Config $spec
* @return void
*/
public function __construct($spec, $options = null)
{
parent::__construct($spec, $options);
$this->setAllowEmpty(true)
->setRequired(true)
->setAutoInsertNotEmptyValidator(false)
->addValidator($this->getCaptcha(), true);
}
/**
* Return all attributes
*
* @return array
*/
public function getAttribs()
{
$attribs = get_object_vars($this);
unset($attribs['helper']);
foreach ($attribs as $key => $value) {
if ('_' == substr($key, 0, 1)) {
unset($attribs[$key]);
}
}
return $attribs;
}
/**
* Set options
*
* Overrides to allow passing captcha options
*
* @param array $options
* @return Zend_Form_Element_Captcha
*/
public function setOptions(array $options)
{
if (array_key_exists('captcha', $options)) {
if (array_key_exists('captchaOptions', $options)) {
$this->setCaptcha($options['captcha'], $options['captchaOptions']);
unset($options['captchaOptions']);
} else {
$this->setCaptcha($options['captcha']);
}
unset($options['captcha']);
}
return parent::setOptions($options);
}
/**
* Render form element
*
* @param Zend_View_Interface $view
* @return string
*/
public function render(Zend_View_Interface $view = null)
{
$captcha = $this->getCaptcha();
$captcha->setName($this->getFullyQualifiedName());
$decorators = $this->getDecorators();
$decorator = $captcha->getDecorator();
if (!empty($decorator)) {
array_unshift($decorators, $decorator);
}
$decorator = array('Captcha', array('captcha' => $captcha));
array_unshift($decorators, $decorator);
$this->setDecorators($decorators);
$this->setValue($this->getCaptcha()->generate());
return parent::render($view);
}
/**
* Retrieve plugin loader for validator or filter chain
*
* Support for plugin loader for Captcha adapters
*
* @param string $type
* @return Zend_Loader_PluginLoader
* @throws Zend_Loader_Exception on invalid type.
*/
public function getPluginLoader($type)
{
$type = strtoupper($type);
if ($type == self::CAPTCHA) {
if (!isset($this->_loaders[$type])) {
require_once 'Zend/Loader/PluginLoader.php';
$this->_loaders[$type] = new Zend_Loader_PluginLoader(
array('Zend_Captcha' => 'Zend/Captcha/')
);
}
return $this->_loaders[$type];
} else {
return parent::getPluginLoader($type);
}
}
/**
* Add prefix path for plugin loader for captcha adapters
*
* This method handles the captcha type, the rest is handled by
* the parent
* @param string $prefix
* @param string $path
* @param string $type
* @return Zend_Form_Element
* @see Zend_Form_Element::addPrefixPath
*/
public function addPrefixPath($prefix, $path, $type = null)
{
$type = strtoupper($type);
switch ($type) {
case null:
$loader = $this->getPluginLoader(self::CAPTCHA);
$cPrefix = rtrim($prefix, '_') . '_Captcha';
$cPath = rtrim($path, '/\\') . '/Captcha';
$loader->addPrefixPath($cPrefix, $cPath);
return parent::addPrefixPath($prefix, $path);
case self::CAPTCHA:
$loader = $this->getPluginLoader($type);
$loader->addPrefixPath($prefix, $path);
return $this;
default:
return parent::addPrefixPath($prefix, $path, $type);
}
}
/**
* Load default decorators
*
* @return void
*/
public function loadDefaultDecorators()
{
if ($this->loadDefaultDecoratorsIsDisabled()) {
return;
}
$decorators = $this->getDecorators();
if (empty($decorators)) {
$this->addDecorator('Errors')
->addDecorator('Description', array('tag' => 'p', 'class' => 'description'))
->addDecorator('HtmlTag', array('tag' => 'dd'))
->addDecorator('Label', array('tag' => 'dt'));
}
}
/**
* Is the captcha valid?
*
* @param mixed $value
* @param mixed $context
* @return boolean
*/
public function isValid($value, $context = null)
{
$this->getCaptcha()->setName($this->getName());
$belongsTo = $this->getBelongsTo();
if (empty($belongsTo) || !is_array($context)) {
return parent::isValid($value, $context);
}
$name = $this->getFullyQualifiedName();
$root = substr($name, 0, strpos($name, '['));
$segments = substr($name, strpos($name, '['));
$segments = ltrim($segments, '[');
$segments = rtrim($segments, ']');
$segments = explode('][', $segments);
array_unshift($segments, $root);
array_pop($segments);
$newContext = $context;
foreach ($segments as $segment) {
if (array_key_exists($segment, $newContext)) {
$newContext = $newContext[$segment];
}
}
return parent::isValid($value, $newContext);
}
}
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