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<?php
# Movable Type (r) Open Source (C) 2001-2012 Six Apart, Ltd.
# This program is distributed under the terms of the
# GNU General Public License, version 2.
#
# $Id$
interface CaptchaProvider {
public function get_name();
public function get_classname();
public function form_fields($blog_id);
}
class MTUtilCaptcha implements CaptchaProvider {
public function get_name() {
return 'Movable Type default';
}
public function get_classname() {
return 'MTUtilCaptcha';
}
public function form_fields($blog_id) {
$mt = MT::get_instance();
$token = '';
$token = sha1(rand(0, 65535));
if (strlen($token) == 0) {
return '';
}
$cgipath = $mt->config('CGIPath');
$commentscript = $mt->config('CommentScript');
$caption = $mt->translate('Captcha');
$description = $mt->translate('Type the characters you see in the picture above.');
$form = "
<div class=\"label\"><label for=\"captcha_code\">$caption:</label></div>
<div class=\"field\">
<input type=\"hidden\" name=\"token\" value=\"$token\" />
<img src=\"$cgipath$commentscript/captcha/$blog_id/$token\" width=\"150\" height=\"35\" /><br />
<input name=\"captcha_code\" id=\"captcha-code\" value=\"\" autocomplete=\"off\" />
<p>$description</p>
</div>";
return $form;
}
}
class CaptchaFactory {
private static $_captcha_providers = array(
'mt_default' => 'MTUtilCaptcha',
);
private static $_providers = array();
private function __construct() { }
public static function get_provider($provider) {
if ( empty($provider) || 'none' == strtolower($provider) )
return null;
if (!isset(CaptchaFactory::$_captcha_providers[$provider])) {
require_once('class.exception.php');
throw new MTException('Undefined captcha provider. (' . $provider . ')');
}
$class = CaptchaFactory::$_captcha_providers[$provider];
$instance = new $class;
if (!empty($instance) and $instance instanceof CaptchaProvider)
CaptchaFactory::$_providers[$provider] = $instance;
return CaptchaFactory::$_providers[$provider];
}
public static function add_provider($provider, $class) {
if (empty($provider) or empty($class))
return null;
CaptchaFactory::$_captcha_providers[$provider] = $class;
return true;
}
}
?>
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