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<?php
/**
* Laconica, the distributed open-source microblogging tool
*
* Plugin to show reCaptcha when a user registers
*
* PHP version 5
*
* LICENCE: This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* @category Plugin
* @package Laconica
* @author Eric Helgeson <erichelgeson@gmail.com>
* @copyright 2009
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://laconi.ca/
*/
if (!defined('LACONICA')) {
exit(1);
}
define('RECAPTCHA', '0.2');
class recaptcha extends Plugin
{
var $private_key;
var $public_key;
var $display_errors;
var $failed;
var $ssl;
function __construct($public_key, $private_key, $display_errors=false)
{
parent::__construct();
require_once(INSTALLDIR.'/plugins/recaptcha/recaptchalib.php');
$this->public_key = $public_key;
$this->private_key = $private_key;
$this->display_errors = $display_errors;
}
function checkssl(){
if(common_config('site', 'ssl') === 'sometimes' || common_config('site', 'ssl') === 'always') {
return true;
}
return false;
}
function onStartShowHTML($action)
{
//XXX: Horrible hack to make Safari, FF2, and Chrome work with
//reChapcha. reChapcha beaks xhtml strict
header('Content-Type: text/html');
$action->extraHeaders();
$action->startXML('html',
'-//W3C//DTD XHTML 1.0 Strict//EN',
'http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd');
$action->raw('<style type="text/css">#recaptcha_area{float:left;}</style>');
return false;
}
function onEndRegistrationFormData($action)
{
$action->elementStart('li');
$action->raw('<label for="recaptcha_area">Captcha</label>');
if($this->checkssl() === true){
$action->raw(recaptcha_get_html($this->public_key), null, true);
} else {
$action->raw(recaptcha_get_html($this->public_key));
}
$action->elementEnd('li');
return true;
}
function onStartRegistrationTry($action)
{
$resp = recaptcha_check_answer ($this->private_key,
$_SERVER["REMOTE_ADDR"],
$action->trimmed('recaptcha_challenge_field'),
$action->trimmed('recaptcha_response_field'));
if (!$resp->is_valid)
{
if($this->display_errors)
{
$action->showForm ("(reCAPTCHA said: " . $resp->error . ")");
}
$action->showForm("Captcha does not match!");
return false;
}
}
}
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