{

/**

* Constructor

*

* For php4 compatability we must not use the __constructor as a constructor for plugins

* because func_get_args ( void ) returns a copy of all passed arguments NOT references.

* This causes problems with cross-referencing necessary for the observer design pattern.

*

* @access protected

* @paramobject $subject The object to observe

* @paramarray $config An array that holds the plugin configuration

* @since1.0

*/

function plgSystemConfidentCAPTCHA( &$subject, $config )

{

parent::__construct( $subject, $config );

require_once(dirname(__FILE__).'/confidentcaptcha/config.php');

require_once(dirname(__FILE__).'/confidentcaptcha/confidentcaptcha/ccap_api.php');

require_once(dirname(__FILE__).'/confidentcaptcha/confidentcaptcha/ccap_persist.php');

require_once(dirname(__FILE__).'/confidentcaptcha/confidentcaptcha/ccap_prod_open_policy.php');

$this->ccap_callback_url = null;

$this->ccap_options = array(

'display_style' => 'modal',

);

$ccap_api = new CCAP_API(

$this->params->get('customer_id')

,$this->params->get('site_id')

,$this->params->get('api_username')

,$this->params->get('api_password')

,$this->params->get('captcha_server_url','http://captcha.confidenttechnologies.com/')

,'20100910_JOOMLA_1.0.7'

);

$this->ccap_persist = new CCAP_PersistSession();

$this->ccap_policy = new CCAP_ProductionFailOpen($ccap_api, $this->ccap_persist);

}

// the captch check logic

function onAfterRoute()

{

// init vars

$app =& JFactory::getApplication();

$uri =& JFactory::getUri();

$option = JRequest::getCmd('option');

$task = JRequest::getCmd('task');

$check = false;

$redirect = $uri->toString();

// assign check to true for matching conditions

if ($this->params->get('enabled_site_contact',1) && $app->isSite() && $option == 'com_contact' && $task == 'submit') {

$check = true;

}

if ($this->params->get('enabled_site_registration',1) && $app->isSite() && $option == 'com_user' && $task == 'register_save') {

$redirect = JRoute::_('index.php?option=com_user&view=register');

$check = true;

}

if ($this->params->get('enabled_administrator_login',0) && $app->isAdmin() && $option == 'com_login' && $task == 'login') {

$check = true;

}

if ($check) {

if (!$this->onCaptchaFormSubmit()) {

$app->redirect($redirect);

die();

}

}

}

// the captch display logic

function onAfterDispatch()

{

// init vars

$app =& JFactory::getApplication();

$document =& JFactory::getDocument();

$option = JRequest::getCmd('option');

$view = JRequest::getCmd('view');

// defaults

$display = false;

$pattern = '<button class="button validate" type="submit">';

$renderer = 'component';

// assign display to true for matching conditions (override defaults)

if ($this->params->get('enabled_site_contact',1) && $app->isSite() && $option == 'com_contact' && $view == 'contact') {

$display = true;

}

if ($this->params->get('enabled_site_registration',1) && $app->isSite() && $option == 'com_user' && $view == 'register') {

$display = true;

}

if ($this->params->get('enabled_administrator_login',1) && $app->isAdmin() && $option == 'com_login') {

$display = true;

$pattern = '<div class="button_holder">';

}

if ($display) {

if ($captcha = $this->onCaptchaFormDisplay()) {

// could use DOM parser, regex, or teplate overrides as alternative methods to inject captcha

$buffer = $document->getBuffer($renderer);

$output = str_replace($pattern, $captcha.$pattern, $buffer);

$document->setBuffer($output, $renderer);

}

}

}

// wrapper for CC check captcha core ( onAfterRoute() )

function onCaptchaFormSubmit()

{

$app =& JFactory::getApplication();

$this->ccap_policy->start_captcha_page();

$check = $this->ccap_policy->check_form($_REQUEST);

if (!$check) {

$app->enqueueMessage('CAPTCHA failed - please try again.', 'error');

return false; // block form submit

}

return true; // allow form submit

}

// wrapper for CC create_captcha() method ( onAfterDispatch() )

function onCaptchaFormDisplay()

{

if ($this->params->get('load_jquery',1)) {

$document =& JFactory::getDocument();

$headData = $document->getHeadData();

$headData['scripts']['http://code.jquery.com/jquery-1.4.2.min.js'] = 'text/javascript';

$headData['script']['text/javascript'] = "jQuery.noConflict();\n" . $headData['script']['text/javascript'];

$document->setHeadData($headData);

}

$this->ccap_policy->reset();

$ccap_captcha = $this->ccap_policy->create_visual($this->ccap_callback_url, $this->ccap_options);

return $ccap_captcha;

}