Atom pub feed for group memberships
Feed for group memberships, in activity streams format. Shows a feed; has proper pagination; accepts activitystreams "join" activities to start a new membership.
This commit is contained in:
Evan Prodromou
parent
4be9c0a0e9
commit
c6d6f25b52
355
actions/atompubmembershipfeed.php
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355
actions/atompubmembershipfeed.php
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<?php
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/**
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* StatusNet - the distributed open-source microblogging tool
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* Copyright (C) 2010, StatusNet, Inc.
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*
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* Feed of group memberships for a user, in ActivityStreams format
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*
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* PHP version 5
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* @category AtomPub
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* @package StatusNet
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* @author Evan Prodromou <evan@status.net>
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* @copyright 2010 StatusNet, Inc.
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
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* @link http://status.net/
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*/
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if (!defined('STATUSNET')) {
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// This check helps protect against security problems;
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// your code file can't be executed directly from the web.
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exit(1);
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}
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require_once INSTALLDIR . '/lib/apiauth.php';
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/**
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* Feed of group memberships for a user, in ActivityStreams format
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*
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* @category Action
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* @package StatusNet
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* @author Evan Prodromou <evan@status.net>
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* @copyright 2010 StatusNet, Inc.
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
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* @link http://status.net/
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*/
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class AtompubmembershipfeedAction extends ApiAuthAction
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{
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private $_profile = null;
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private $_memberships = null;
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/**
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* For initializing members of the class.
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*
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* @param array $argarray misc. arguments
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*
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* @return boolean true
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*/
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function prepare($argarray)
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{
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parent::prepare($argarray);
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$profileId = $this->trimmed('profile');
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$this->_profile = Profile::staticGet('id', $profileId);
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if (empty($this->_profile)) {
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throw new ClientException(_('No such profile.'), 404);
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}
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$offset = ($this->page-1) * $this->count;
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$limit = $this->count + 1;
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$this->_memberships = Group_member::byMember($this->_profile->id,
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$offset,
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$limit);
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return true;
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}
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/**
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* Handler method
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*
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* @param array $argarray is ignored since it's now passed in in prepare()
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*
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* @return void
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*/
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function handle($argarray=null)
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{
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parent::handle($argarray);
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switch ($_SERVER['REQUEST_METHOD']) {
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case 'HEAD':
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case 'GET':
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$this->showFeed();
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break;
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case 'POST':
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$this->addMembership();
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break;
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default:
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throw new ClientException(_('HTTP method not supported.'), 405);
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return;
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}
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return;
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}
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/**
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* Show a feed of favorite activity streams objects
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*
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* @return void
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*/
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function showFeed()
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{
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header('Content-Type: application/atom+xml; charset=utf-8');
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$url = common_local_url('AtomPubMembershipFeed',
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array('profile' => $this->_profile->id));
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$feed = new Atom10Feed(true);
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$feed->addNamespace('activity',
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'http://activitystrea.ms/spec/1.0/');
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$feed->addNamespace('poco',
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'http://portablecontacts.net/spec/1.0');
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$feed->addNamespace('media',
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'http://purl.org/syndication/atommedia');
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$feed->id = $url;
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$feed->setUpdated('now');
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$feed->addAuthor($this->_profile->getBestName(),
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$this->_profile->getURI());
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$feed->setTitle(sprintf(_("%s group memberships"),
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$this->_profile->getBestName()));
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$feed->setSubtitle(sprintf(_("Groups %s is a member of on %s"),
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$this->_profile->getBestName(),
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common_config('site', 'name')));
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$feed->addLink(common_local_url('usergroups',
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array('nickname' =>
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$this->_profile->nickname)));
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$feed->addLink($url,
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array('rel' => 'self',
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'type' => 'application/atom+xml'));
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// If there's more...
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if ($this->page > 1) {
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$feed->addLink($url,
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array('rel' => 'first',
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'type' => 'application/atom+xml'));
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$feed->addLink(common_local_url('AtomPubMembershipFeed',
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array('profile' =>
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$this->_profile->id),
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array('page' =>
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$this->page - 1)),
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array('rel' => 'prev',
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'type' => 'application/atom+xml'));
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}
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if ($this->_memberships->N > $this->count) {
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$feed->addLink(common_local_url('AtomPubMembershipFeed',
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array('profile' =>
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$this->_profile->id),
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array('page' =>
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$this->page + 1)),
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array('rel' => 'next',
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'type' => 'application/atom+xml'));
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}
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$i = 0;
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while ($this->_memberships->fetch()) {
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// We get one more than needed; skip that one
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$i++;
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if ($i > $this->count) {
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break;
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}
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$act = $this->_memberships->asActivity();
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$feed->addEntryRaw($act->asString(false, false, false));
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}
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$this->raw($feed->getString());
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}
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/**
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* add a new favorite
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*
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* @return void
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*/
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function addMembership()
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{
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// XXX: Refactor this; all the same for atompub
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if (empty($this->auth_user) ||
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$this->auth_user->id != $this->_profile->id) {
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throw new ClientException(_("Can't add someone else's".
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" membership"), 403);
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}
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$xml = file_get_contents('php://input');
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$dom = DOMDocument::loadXML($xml);
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if ($dom->documentElement->namespaceURI != Activity::ATOM ||
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$dom->documentElement->localName != 'entry') {
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// TRANS: Client error displayed when not using an Atom entry.
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throw new ClientException(_('Atom post must be an Atom entry.'));
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return;
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}
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$activity = new Activity($dom->documentElement);
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$membership = null;
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if (Event::handle('StartAtomPubNewActivity', array(&$activity))) {
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if ($activity->verb != ActivityVerb::JOIN) {
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// TRANS: Client error displayed when not using the POST verb.
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// TRANS: Do not translate POST.
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throw new ClientException(_('Can only handle Join activities.'));
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return;
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}
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$groupObj = $activity->objects[0];
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if ($groupObj->type != ActivityObject::GROUP) {
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throw new ClientException(_('Can only fave notices.'));
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return;
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}
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$group = User_group::staticGet('uri', $groupObj->id);
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if (empty($group)) {
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// XXX: import from listed URL or something
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throw new ClientException(_('Unknown group.'));
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}
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$old = Group_member::pkeyGet(array('profile_id' => $this->auth_user->id,
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'group_id' => $group->id));
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if (!empty($old)) {
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throw new ClientException(_('Already a member.'));
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}
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$profile = $this->auth_user->getProfile();
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if (Group_block::isBlocked($group, $profile)) {
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// XXX: import from listed URL or something
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throw new ClientException(_('Blocked by admin.'));
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}
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if (Event::handle('StartJoinGroup', array($group, $this->auth_user))) {
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$membership = Group_member::join($group->id, $this->auth_user->id);
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Event::handle('EndJoinGroup', array($group, $this->auth_user));
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}
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Event::handle('EndAtomPubNewActivity', array($activity, $membership));
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}
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if (!empty($membership)) {
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$act = $membership->asActivity();
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header('Content-Type: application/atom+xml; charset=utf-8');
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header('Content-Location: ' . $act->selfLink);
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$this->startXML();
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$this->raw($act->asString(true, true, true));
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$this->endXML();
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}
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}
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/**
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* Return true if read only.
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*
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* MAY override
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*
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* @param array $args other arguments
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*
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* @return boolean is read only action?
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*/
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function isReadOnly($args)
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{
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if ($_SERVER['REQUEST_METHOD'] == 'GET' ||
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$_SERVER['REQUEST_METHOD'] == 'HEAD') {
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return true;
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} else {
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return false;
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}
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}
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/**
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* Return last modified, if applicable.
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*
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* MAY override
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*
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* @return string last modified http header
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*/
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function lastModified()
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{
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// For comparison with If-Last-Modified
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// If not applicable, return null
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return null;
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}
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/**
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* Return etag, if applicable.
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*
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* MAY override
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*
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* @return string etag http header
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*/
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function etag()
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{
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return null;
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}
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/**
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* Does this require authentication?
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*
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* @return boolean true if delete, else false
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*/
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function requiresAuth()
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{
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if ($_SERVER['REQUEST_METHOD'] == 'GET' ||
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$_SERVER['REQUEST_METHOD'] == 'HEAD') {
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return false;
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} else {
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return true;
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}
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}
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}
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