<?php
/**
 * StatusNet, the distributed open-source microblogging tool
 *
 * Group main page
 *
 * 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>
 * @author    Sarven Capadisli <csarven@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);
}

require_once INSTALLDIR.'/lib/rssaction.php';

define('MEMBERS_PER_SECTION', 27);

/**
 * Group RSS feed
 *
 * @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 groupRssAction extends Rss10Action
{
    /** group we're viewing. */
    var $group = null;

    /**
     * Is this page read-only?
     *
     * @return boolean true
     */
    function isReadOnly($args)
    {
        return true;
    }

    /**
     * Prepare the action
     *
     * Reads and validates arguments and instantiates the attributes.
     *
     * @param array $args $_REQUEST args
     *
     * @return boolean success flag
     */
    function prepare($args)
    {
        parent::prepare($args);

        $nickname_arg = $this->arg('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('showgroup', $args), 301);
            return false;
        }

        if (!$nickname) {
            // TRANS: Client error displayed when requesting a group RSS feed without providing a group nickname.
            $this->clientError(_('No nickname.'), 404);
            return false;
        }

        $local = Local_group::staticGet('nickname', $nickname);

        if (!$local) {
            // TRANS: Client error displayed when requesting a group RSS feed for group that does not exist.
            $this->clientError(_('No such group.'), 404);
            return false;
        }

        $this->group = User_group::staticGet('id', $local->group_id);

        if (!$this->group) {
            // TRANS: Client error displayed when requesting a group RSS feed for an object that is not a group.
            $this->clientError(_('No such group.'), 404);
            return false;
        }

        $this->notices = $this->getNotices($this->limit);
        return true;
    }

    function getNotices($limit=0)
    {
        $group = $this->group;

        if (is_null($group)) {
            return null;
        }

        $notices = array();
        $notice = $group->getNotices(0, ($limit == 0) ? NOTICES_PER_PAGE : $limit);

        while ($notice->fetch()) {
            $notices[] = clone($notice);
        }

        return $notices;
    }

    function getChannel()
    {
        $group = $this->group;
        $c = array('url' => common_local_url('grouprss',
                                             array('nickname' =>
                                                   $group->nickname)),
                   // TRANS: Message is used as link title. %s is a user nickname.
                   'title' => sprintf(_('%s timeline'), $group->nickname),
                   'link' => common_local_url('showgroup', array('nickname' => $group->nickname)),
                   // TRANS: Message is used as link description. %1$s is a group name, %2$s is a site name.
                   'description' => sprintf(_('Updates from members of %1$s on %2$s!'),
                                            $group->nickname, common_config('site', 'name')));
        return $c;
    }

    function getImage()
    {
        return $this->group->homepage_logo;
    }
}
