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<?php
/**
* Action to let RSSCloud aggregators request update notification when
* user profile feeds change.
*
* PHP version 5
*
* @category Plugin
* @package StatusNet
* @author Zach Copley <zach@status.net>
* @license http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
* @link http://status.net/
*
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2009, StatusNet, Inc.
*
* 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/>.
*/
if (!defined('STATUSNET')) {
exit(1);
}
class RSSCloudRequestNotifyAction extends Action
{
/**
* Initialization.
*
* @param array $args Web and URL arguments
*
* @return boolean false if user doesn't exist
*/
function prepare($args)
{
parent::prepare($args);
$this->ip = $_SERVER['REMOTE_ADDR'];
$this->port = $this->arg('port');
$this->path = $this->arg('path');
$this->protocol = $this->arg('protocol');
$this->procedure = $this->arg('notifyProcedure');
$this->feeds = $this->getFeeds();
$this->subscriber_url = 'http://' . $this->ip . ':' . $this->port . $this->path;
return true;
}
function handle($args)
{
parent::handle($args);
if ($_SERVER['REQUEST_METHOD'] != 'POST') {
$this->showResult(false, 'Request must be POST.');
return;
}
$missing = array();
if (empty($this->port)) {
$missing[] = 'port';
}
$path = $this->arg('path');
if (empty($this->path)) {
$missing[] = 'path';
}
$protocol = $this->arg('protocol');
if (empty($this->protocol)) {
$missing[] = 'protocol';
}
if (!isset($this->procedure)) {
$missing[] = 'notifyProcedure';
}
if (!empty($missing)) {
$msg = 'The following parameters were missing from the request body: ' .
implode(', ', $missing) . '.';
$this->showResult(false, $msg);
return;
}
if (empty($this->feeds)) {
$this->showResult(false,
'You must provide at least one valid profile feed url (url1, url2, url3 ... urlN).');
return;
}
$endpoint = $ip . ':' . $port . $path;
foreach ($this->feeds as $feed) {
$this->saveSubscription($feed);
}
// XXX: What to do about deleting stale subscriptions? 25 hours seems harsh.
// WordPress doesn't ever remove subscriptions.
$msg = 'Thanks for the registration. It worked. When the feed(s) update(s) we\'ll notify you. ' .
' Don\'t forget to re-register after 24 hours, your subscription will expire in 25.';
$this->showResult(true, $msg);
}
function getFeeds()
{
$feeds = array();
foreach ($this->args as $key => $feed ) {
if (preg_match('|url\d+|', $key)) {
if ($this->testFeed($feed)) {
$feeds[] = $feed;
} else {
$msg = 'RSSCloud Plugin - ' . $this->ip . ' tried to subscribe ' .
'to a non-existent feed: ' . $feed;
common_log(LOG_WARN, $msg);
}
}
}
return $feeds;
}
function testNotificationHandler($feed)
{
$notifier = new RSSCloudNotifier();
return $notifier->postUpdate($endpoint, $feed);
}
// returns valid user or false
function testFeed($feed)
{
$user = $this->userFromFeed($feed);
if (!empty($user)) {
common_debug("Valid feed: $feed");
// OK, so this is a valid profile feed url, now let's see if the
// other system reponds to our notifications before we
// add the sub...
if ($this->testNotificationHandler($feed)) {
return true;
}
}
return false;
}
// this actually does the validating and figuring out the
// user, which it returns
function userFromFeed($feed)
{
// We only do profile feeds
$path = common_path('api/statuses/user_timeline/');
$valid = '%^' . $path . '(?<nickname>.*)\.rss$%';
if (preg_match($valid, $feed, $matches)) {
$user = User::staticGet('nickname', $matches['nickname']);
if (!empty($user)) {
return $user;
}
}
return false;
}
function saveSubscription($feed)
{
// check to see if we already have a profile for this subscriber
$other = Remote_profile::staticGet('uri', $this->subscriber_url);
if ($other === false) {
$other->saveProfile();
}
$user = userFromFeed($feed);
$result = subs_subscribe_to($user, $other);
if ($result != true) {
$msg = "RSSPlugin - got '$result' trying to subscribe " .
"$this->subscriber_url to $user->nickname" . "'s profile feed.";
common_log(LOG_WARN, $msg);
} else {
$msg = 'RSSCloud plugin - subscribe: ' . $this->subscriber_url .
' subscribed to ' . $feed;
common_log(LOG_INFO, $msg);
}
}
function saveProfile()
{
common_debug("Saving remote profile for $this->subscriber_url");
// XXX: We need to add a field to Remote_profile to indicate the kind
// of remote profile? i.e: OMB, RSSCloud, PuSH, Twitter
$remote = new Remote_profile();
$remote->uri = $this->subscriber_url;
$remote->postnoticeurl = $this->subscriber_url;
$remote->created = DB_DataObject_Cast::dateTime();
if (!$remote->insert()) {
throw new Exception(_('RSSCloud plugin - Error inserting remote profile!'));
}
}
function showResult($success, $msg)
{
$this->startXML();
$this->elementStart('notifyResult', array('success' => ($success) ? 'true' : 'false',
'msg' => $msg));
$this->endXML();
}
}
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