<?php
/**
 * StatusNet, the distributed open-source microblogging tool
 *
 * An AtomPub service document for a user
 *
 * 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  API
 * @package   StatusNet
 * @author    Evan Prodromou <evan@status.net>
 * @copyright 2010 StatusNet, Inc.
 * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPLv3
 * @link      http://status.net/
 */

if (!defined('STATUSNET')) {
    exit(1);
}

/**
 * Shows an AtomPub service document for a user
 *
 * @category  API
 * @package   StatusNet
 * @author    Evan Prodromou <evan@status.net>
 * @copyright 2010 StatusNet, Inc.
 * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPLv3
 * @link      http://status.net/
 */
class ApiAtomServiceAction extends ApiBareAuthAction
{
    /**
     * Take arguments for running
     *
     * @param array $args $_REQUEST args
     *
     * @return boolean success flag
     *
     */
    function prepare(array $args=array())
    {
        parent::prepare($args);
        $this->user = $this->getTargetUser($this->arg('id'));

        if (empty($this->user)) {
            // TRANS: Client error displayed when making an Atom API request for an unknown user.
            $this->clientError(_('No such user.'), 404);
        }

        return true;
    }

    /**
     * Handle the arguments. In our case, show a service document.
     *
     * @param Array $args unused.
     *
     * @return void
     */
    function handle(array $args=array())
    {
        parent::handle($args);

        header('Content-Type: application/atomsvc+xml');

        $this->startXML();
        $this->elementStart('service', array('xmlns' => 'http://www.w3.org/2007/app',
                                             'xmlns:atom' => 'http://www.w3.org/2005/Atom',
                                             'xmlns:activity' => 'http://activitystrea.ms/spec/1.0/'));
        $this->elementStart('workspace');
        // TRANS: Title for Atom feed.
        $this->element('atom:title', null, _m('ATOM','Main'));
        $this->elementStart('collection',
                            array('href' => common_local_url('ApiTimelineUser',
                                                             array('id' => $this->user->id,
                                                                   'format' => 'atom'))));
        $this->element('atom:title',
                       null,
                       // TRANS: Title for Atom feed. %s is a user nickname.
                       sprintf(_("%s timeline"),
                               $this->user->nickname));
        $this->element('accept', null, 'application/atom+xml;type=entry');
        $this->element('activity:verb', null, ActivityVerb::POST);
        $this->elementEnd('collection');
        $this->elementStart('collection',
                            array('href' => common_local_url('AtomPubSubscriptionFeed',
                                                             array('subscriber' => $this->user->id))));
        $this->element('atom:title',
                       null,
                       // TRANS: Title for Atom feed with a user's subscriptions. %s is a user nickname.
                       sprintf(_("%s subscriptions"),
                               $this->user->nickname));
        $this->element('accept', null, 'application/atom+xml;type=entry');
        $this->element('activity:verb', null, ActivityVerb::FOLLOW);
        $this->elementEnd('collection');
        $this->elementStart('collection',
                            array('href' => common_local_url('AtomPubFavoriteFeed',
                                                             array('profile' => $this->user->id))));
        $this->element('atom:title',
                       null,
                       // TRANS: Title for Atom feed with a user's favorite notices. %s is a user nickname.
                       sprintf(_("%s favorites"),
                               $this->user->nickname));
        $this->element('accept', null, 'application/atom+xml;type=entry');
        $this->element('activity:verb', null, ActivityVerb::FAVORITE);
        $this->elementEnd('collection');
        $this->elementStart('collection',
                            array('href' => common_local_url('AtomPubMembershipFeed',
                                                             array('profile' => $this->user->id))));
        $this->element('atom:title',
                       null,
                       // TRANS: Title for Atom feed with a user's memberships. %s is a user nickname.
                       sprintf(_("%s memberships"),
                               $this->user->nickname));
        $this->element('accept', null, 'application/atom+xml;type=entry');
        $this->element('activity:verb', null, ActivityVerb::JOIN);
        $this->elementEnd('collection');
        $this->elementEnd('workspace');
        $this->elementEnd('service');
        $this->endXML();
    }
}