+<?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 CancelgroupAction extends Action
+{
+ var $group = null;
+
+ /**
+ * Prepare to run
+ */
+ function prepare($args)
+ {
+ parent::prepare($args);
+
+ if (!common_logged_in()) {
+ // TRANS: Client error displayed when trying to leave a group while not logged in.
+ $this->clientError(_('You must be logged in to leave a group.'));
+ return false;
+ }
+
+ $nickname_arg = $this->trimmed('nickname');
+ $id = intval($this->arg('id'));
+ if ($id) {
+ $this->group = User_group::staticGet('id', $id);
+ } else if ($nickname_arg) {
+ $nickname = common_canonical_nickname($nickname_arg);
+
+ // Permanent redirect on non-canonical nickname
+
+ if ($nickname_arg != $nickname) {
+ $args = array('nickname' => $nickname);
+ common_redirect(common_local_url('leavegroup', $args), 301);
+ return false;
+ }
+
+ $local = Local_group::staticGet('nickname', $nickname);
+
+ if (!$local) {
+ // TRANS: Client error displayed when trying to leave a non-local group.
+ $this->clientError(_('No such group.'), 404);
+ return false;
+ }
+
+ $this->group = User_group::staticGet('id', $local->group_id);
+ } else {
+ // TRANS: Client error displayed when trying to leave a group without providing a group name or group ID.
+ $this->clientError(_('No nickname or ID.'), 404);
+ return false;
+ }
+
+ if (!$this->group) {
+ // TRANS: Client error displayed when trying to leave a non-existing group.
+ $this->clientError(_('No such group.'), 404);
+ return false;
+ }
+
+ $cur = common_current_user();
+ $this->profile = $cur->getProfile();
+
+ $this->request = Group_join_queue::pkeyGet(array('profile_id' => $this->profile->id,
+ 'group_id' => $this->group->id));
+
+ if (empty($this->request)) {
+ $this->clientError(_('You are not in the moderation queue for this group.'), 403);
+ }
+ return true;
+ }
+
+ /**
+ * Handle the request
+ *
+ * On POST, add the current user to the group
+ *
+ * @param array $args unused
+ *
+ * @return void
+ */
+ function handle($args)
+ {
+ parent::handle($args);
+
+ try {
+ $this->profile->cancelJoinGroup($this->group);
+ } catch (Exception $e) {
+ common_log(LOG_ERROR, "Exception canceling group sub: " . $e->getMessage());
+ // TRANS: Server error displayed when cancelling a queued group join request fails.
+ // TRANS: %1$s is the leaving user's nickname, $2$s is the group nickname for which the leave failed.
+ $this->serverError(sprintf(_('Could not cancel request for user %1$s to join group %2$s.'),
+ $this->profile->nickname, $this->group->nickname));
+ return;
+ }
+
+ if ($this->boolean('ajax')) {
+ $this->startHTML('text/xml;charset=utf-8');
+ $this->elementStart('head');
+ // TRANS: Title for leave group page after leaving.
+ $this->element('title', null, sprintf(_m('TITLE','%1$s left group %2$s'),
+ $this->profile->nickname,
+ $this->group->nickname));
+ $this->elementEnd('head');
+ $this->elementStart('body');
+ $jf = new JoinForm($this, $this->group);
+ $jf->show();
+ $this->elementEnd('body');
+ $this->elementEnd('html');
+ } else {
+ common_redirect(common_local_url('groupmembers', array('nickname' =>
+ $this->group->nickname)),
+ 303);
+ }
+ }
+}