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<?php
/*
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2010, 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/>.
*/
/**
* @package OStatusPlugin
* @author James Walker <james@status.net>
*/
if (!defined('STATUSNET')) {
exit(1);
}
class SalmonAction extends Action
{
var $xml = null;
var $activity = null;
function prepare($args)
{
StatusNet::setApi(true); // Send smaller error pages
parent::prepare($args);
if ($_SERVER['REQUEST_METHOD'] != 'POST') {
$this->clientError(_m('This method requires a POST.'));
}
if (empty($_SERVER['CONTENT_TYPE']) || $_SERVER['CONTENT_TYPE'] != 'application/atom+xml') {
$this->clientError(_m('Salmon requires application/atom+xml'));
}
$xml = file_get_contents('php://input');
$dom = DOMDocument::loadXML($xml);
if ($dom->documentElement->namespaceURI != Activity::ATOM ||
$dom->documentElement->localName != 'entry') {
common_log(LOG_DEBUG, "Got invalid Salmon post: $xml");
$this->clientError(_m('Salmon post must be an Atom entry.'));
}
// Check the signature
$salmon = new Salmon;
if (!common_config('ostatus', 'skip_signatures')) {
if (!$salmon->verifyMagicEnv($dom)) {
common_log(LOG_DEBUG, "Salmon signature verification failed.");
$this->clientError(_m('Salmon signature verification failed.'));
}
}
$this->act = new Activity($dom->documentElement);
return true;
}
/**
* Check the posted activity type and break out to appropriate processing.
*/
function handle($args)
{
StatusNet::setApi(true); // Send smaller error pages
common_log(LOG_DEBUG, "Got a " . $this->act->verb);
if (Event::handle('StartHandleSalmon', array($this->activity))) {
switch ($this->act->verb)
{
case ActivityVerb::POST:
$this->handlePost();
break;
case ActivityVerb::SHARE:
$this->handleShare();
break;
case ActivityVerb::FAVORITE:
$this->handleFavorite();
break;
case ActivityVerb::UNFAVORITE:
$this->handleUnfavorite();
break;
case ActivityVerb::FOLLOW:
case ActivityVerb::FRIEND:
$this->handleFollow();
break;
case ActivityVerb::UNFOLLOW:
$this->handleUnfollow();
break;
case ActivityVerb::JOIN:
$this->handleJoin();
break;
case ActivityVerb::LEAVE:
$this->handleLeave();
break;
case ActivityVerb::UPDATE_PROFILE:
$this->handleUpdateProfile();
break;
default:
throw new ClientException(_m("Unrecognized activity type."));
}
Event::handle('EndHandleSalmon', array($this->activity));
}
}
function handlePost()
{
throw new ClientException(_m("This target doesn't understand posts."));
}
function handleFollow()
{
throw new ClientException(_m("This target doesn't understand follows."));
}
function handleUnfollow()
{
throw new ClientException(_m("This target doesn't understand unfollows."));
}
function handleFavorite()
{
throw new ClientException(_m("This target doesn't understand favorites."));
}
function handleUnfavorite()
{
throw new ClientException(_m("This target doesn't understand unfavorites."));
}
function handleShare()
{
throw new ClientException(_m("This target doesn't understand share events."));
}
function handleJoin()
{
throw new ClientException(_m("This target doesn't understand joins."));
}
function handleLeave()
{
throw new ClientException(_m("This target doesn't understand leave events."));
}
/**
* Remote user sent us an update to their profile.
* If we already know them, accept the updates.
*/
function handleUpdateProfile()
{
$oprofile = Ostatus_profile::getActorProfile($this->act);
if ($oprofile) {
common_log(LOG_INFO, "Got a profile-update ping from $oprofile->uri");
$oprofile->updateFromActivityObject($this->act->actor);
} else {
common_log(LOG_INFO, "Ignoring profile-update ping from unknown " . $this->act->actor->id);
}
}
/**
* @return Ostatus_profile
*/
function ensureProfile()
{
$actor = $this->act->actor;
if (empty($actor->id)) {
common_log(LOG_ERR, "broken actor: " . var_export($actor, true));
common_log(LOG_ERR, "activity with no actor: " . var_export($this->act, true));
throw new Exception("Received a salmon slap from unidentified actor.");
}
return Ostatus_profile::ensureActivityObjectProfile($actor);
}
function saveNotice()
{
$oprofile = $this->ensureProfile();
return $oprofile->processPost($this->act, 'salmon');
}
}
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