1 files changed, 106 insertions, 0 deletions
diff --git a/plugins/recaptcha/recaptcha.php b/plugins/recaptcha/recaptcha.php
new file mode 100644
index 000000000..5ef8352d1
--- /dev/null
+++ b/plugins/recaptcha/recaptcha.php
@@ -0,0 +1,106 @@
+<?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;
+        }
+    }
+}