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+<?php
+/**
+ * Laconica, 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 Laconica
+ * @author Evan Prodromou <evan@controlyourself.ca>
+ * @copyright 2008-2009 Control Yourself, Inc.
+ * @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);
+}
+
+/**
+ * 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 Laconica
+ * @author Evan Prodromou <evan@controlyourself.ca>
+ * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link http://laconi.ca/
+ */
+
+class LeavegroupAction extends Action
+{
+ var $group = null;
+
+ /**
+ * Prepare to run
+ */
+
+ function prepare($args)
+ {
+ parent::prepare($args);
+
+ if (!common_config('inboxes','enabled')) {
+ $this->serverError(_('Inboxes must be enabled for groups to work.'));
+ return false;
+ }
+
+ if (!common_logged_in()) {
+ $this->clientError(_('You must be logged in to leave a group.'));
+ return false;
+ }
+
+ $nickname_arg = $this->trimmed('nickname');
+ $nickname = common_canonical_nickname($nickname_arg);
+
+ // Permanent redirect on non-canonical nickname
+
+ if ($nickname_arg != $nickname) {
+ $args = array('nickname' => $nickname);
+ common_redirect(common_local_url('editgroup', $args), 301);
+ return false;
+ }
+
+ if (!$nickname) {
+ $this->clientError(_('No nickname.'), 404);
+ return false;
+ }
+
+ $this->group = User_group::staticGet('nickname', $nickname);
+
+ if (!$this->group) {
+ $this->clientError(_('No such group.'), 404);
+ return false;
+ }
+
+ $cur = common_current_user();
+
+ if (!$cur->isMember($this->group)) {
+ $this->clientError(_('You are not a member of that group.'), 403);
+ return false;
+ }
+
+ if ($cur->isAdmin($this->group)) {
+ $this->clientError(_('You may not leave a group while you are its administrator.'), 403);
+ return false;
+
+ }
+
+ 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);
+
+ $cur = common_current_user();
+
+ $member = new Group_member();
+
+ $member->group_id = $this->group->id;
+ $member->profile_id = $cur->id;
+
+ if (!$member->find(true)) {
+ $this->serverError(_('Could not find membership record.'));
+ return;
+ }
+
+ $result = $member->delete();
+
+ if (!$result) {
+ common_log_db_error($member, 'INSERT', __FILE__);
+ $this->serverError(sprintf(_('Could not remove user %s to group %s'),
+ $cur->nickname, $this->group->nickname));
+ }
+
+ if ($this->boolean('ajax')) {
+ $this->startHTML('text/xml;charset=utf-8');
+ $this->elementStart('head');
+ $this->element('title', null, sprintf(_('%s left group %s'),
+ $cur->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)));
+ }
+ }
+}