--- /dev/null
+<?php
+/**
+ * StatusNet, the distributed open-source microblogging tool
+ *
+ * Leave a group
+ *
+ * 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 Group
+ * @package StatusNet
+ * @author Evan Prodromou <evan@status.net>
+ * @copyright 2008-2009 StatusNet, Inc.
+ * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link http://status.net/
+ */
+
+if (!defined('STATUSNET') && !defined('LACONICA')) {
+ exit(1);
+}
+
+/**
+ * Leave a group
+ *
+ * This is the action for leaving a group. It works more or less like the subscribe action
+ * for users.
+ *
+ * @category Group
+ * @package StatusNet
+ * @author Evan Prodromou <evan@status.net>
+ * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link http://status.net/
+ */
+class CancelsubscriptionAction extends Action
+{
+
+ function handle($args)
+ {
+ parent::handle($args);
+ if ($this->boolean('ajax')) {
+ StatusNet::setApi(true);
+ }
+ if (!common_logged_in()) {
+ $this->clientError(_('Not logged in.'));
+ return;
+ }
+
+ $user = common_current_user();
+
+ if ($_SERVER['REQUEST_METHOD'] != 'POST') {
+ common_redirect(common_local_url('subscriptions',
+ array('nickname' => $user->nickname)));
+ return;
+ }
+
+ /* Use a session token for CSRF protection. */
+
+ $token = $this->trimmed('token');
+
+ if (!$token || $token != common_session_token()) {
+ $this->clientError(_('There was a problem with your session token. ' .
+ 'Try again, please.'));
+ return;
+ }
+
+ $other_id = $this->arg('unsubscribeto');
+
+ if (!$other_id) {
+ $this->clientError(_('No profile ID in request.'));
+ return;
+ }
+
+ $other = Profile::staticGet('id', $other_id);
+
+ if (!$other) {
+ $this->clientError(_('No profile with that ID.'));
+ return;
+ }
+
+ $this->request = Subscription_queue::pkeyGet(array('subscriber' => $user->id,
+ 'subscribed' => $other->id));
+
+ if (empty($this->request)) {
+ // TRANS: Client error displayed when trying to approve a non-existing group join request.
+ // TRANS: %s is a user nickname.
+ $this->clientError(sprintf(_('%s is not in the moderation queue for this group.'), $this->profile->nickname), 403);
+ }
+
+ $this->request->abort();
+
+ if ($this->boolean('ajax')) {
+ $this->startHTML('text/xml;charset=utf-8');
+ $this->elementStart('head');
+ $this->element('title', null, _('Unsubscribed'));
+ $this->elementEnd('head');
+ $this->elementStart('body');
+ $subscribe = new SubscribeForm($this, $other);
+ $subscribe->show();
+ $this->elementEnd('body');
+ $this->elementEnd('html');
+ } else {
+ common_redirect(common_local_url('subscriptions',
+ array('nickname' => $user->nickname)),
+ 303);
+ }
+ }
+}