gnu-social/plugins/OStatus/actions/salmon.php

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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>
*/
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if (!defined('STATUSNET')) {
exit(1);
}
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class SalmonAction extends Action
{
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var $user = null;
var $xml = null;
var $activity = null;
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function prepare($args)
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{
parent::prepare($args);
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if ($_SERVER['REQUEST_METHOD'] != 'POST') {
$this->clientError(_('This method requires a POST.'));
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}
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if ($_SERVER['CONTENT_TYPE'] != 'application/atom+xml') {
$this->clientError(_('Salmon requires application/atom+xml'));
}
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$id = $this->trimmed('id');
if (!$id) {
$this->clientError(_('No ID.'));
}
$this->user = User::staticGet($id);
if (empty($this->user)) {
$this->clientError(_('No such user.'));
}
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$xml = file_get_contents('php://input');
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$dom = DOMDocument::loadXML($xml);
// XXX: check that document element is Atom entry
// XXX: check the signature
$this->act = new Activity($dom->documentElement);
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return true;
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}
/**
* Check the posted activity type and break out to appropriate processing.
*/
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function handle($args)
{
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common_log(LOG_INFO, 'Salmon: incoming post for user '. $this->user->id);
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// TODO : Insert new $xml -> notice code
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if (Event::handle('StartHandleSalmon', array($this->user, $this->activity))) {
switch ($this->act->verb)
{
case ActivityVerb::POST:
$this->handlePost();
break;
case ActivityVerb::SHARE:
$this->handleShare();
break;
case ActivityVerb::FAVORITE:
$this->handleFavorite();
break;
case ActivityVerb::FOLLOW:
case ActivityVerb::FRIEND:
$this->handleFollow();
break;
case ActivityVerb::UNFOLLOW:
$this->handleUnfollow();
break;
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}
Event::handle('EndHandleSalmon', array($this->user, $this->activity));
}
}
/**
* We've gotten a post event on the Salmon backchannel, probably a reply.
*
* @todo validate if we need to handle this post, then call into
* ostatus_profile's general incoming-post handling.
*/
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function handlePost()
{
switch ($this->act->object->type) {
case ActivityObject::ARTICLE:
case ActivityObject::BLOGENTRY:
case ActivityObject::NOTE:
case ActivityObject::STATUS:
case ActivityObject::COMMENT:
break;
default:
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throw new ClientException("Can't handle that kind of post.");
}
// Notice must either be a) in reply to a notice by this user
// or b) to the attention of this user
$context = $this->act->context;
if (!empty($context->replyToID)) {
$notice = Notice::staticGet('uri', $context->replyToID);
if (empty($notice)) {
throw new ClientException("In reply to unknown notice");
}
if ($notice->profile_id != $this->user->id) {
throw new ClientException("In reply to a notice not by this user");
}
} else if (!empty($context->attention)) {
if (!in_array($context->attention, $this->user->uri)) {
throw new ClientException("To the attention of user(s) not including this one!");
}
} else {
throw new ClientException("Not to anyone in reply to anything!");
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}
$profile = $this->ensureProfile();
// @fixme do something with the post
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}
/**
* We've gotten a follow/subscribe notification from a remote user.
* Save a subscription relationship for them.
*/
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function handleFollow()
{
$oprofile = $this->ensureProfile();
if ($oprofile) {
common_log(LOG_INFO, "Setting up subscription from remote {$oprofile->uri} to local {$this->user->nickname}");
$oprofile->subscribeRemoteToLocal($this->user);
} else {
common_log(LOG_INFO, "Can't set up subscription from remote; missing profile.");
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}
}
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/**
* We've gotten an unfollow/unsubscribe notification from a remote user.
* Check if we have a subscription relationship for them and kill it.
*
* @fixme probably catch exceptions on fail?
*/
function handleUnfollow()
{
$oprofile = $this->ensureProfile();
if ($oprofile) {
common_log(LOG_INFO, "Canceling subscription from remote {$oprofile->uri} to local {$this->user->nickname}");
Subscription::cancel($oprofile->localProfile(), $this->user->getProfile());
} else {
common_log(LOG_ERR, "Can't cancel subscription from remote, didn't find the profile");
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}
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}
/**
* Remote user likes one of our posts.
* Confirm the post is ours, and save a local favorite event.
*/
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function handleFavorite()
{
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// WORST VARIABLE NAME EVER
$object = $this->act->object;
switch ($this->act->object->type) {
case ActivityObject::ARTICLE:
case ActivityObject::BLOGENTRY:
case ActivityObject::NOTE:
case ActivityObject::STATUS:
case ActivityObject::COMMENT:
break;
default:
throw new ClientException("Can't handle that kind of object for liking/faving.");
}
$notice = Notice::staticGet('uri', $object->id);
if (empty($notice)) {
throw new ClientException("Notice with ID $object->id unknown.");
}
if ($notice->profile_id != $this->user->id) {
throw new ClientException("Notice with ID $object->id not posted by $this->user->id.");
}
$profile = $this->ensureProfile();
$old = Fave::pkeyGet(array('user_id' => $profile->id,
'notice_id' => $notice->id));
if (!empty($old)) {
throw new ClientException("We already know that's a fave!");
}
$fave = new Fave();
// @fixme need to change this attribute name, maybe references
$fave->user_id = $profile->id;
$fave->notice_id = $notice->id;
$result = $fave->insert();
if (!$result) {
common_log_db_error($fave, 'INSERT', __FILE__);
throw new ServerException('Could not save new favorite.');
}
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}
/**
* Remote user doesn't like one of our posts after all!
* Confirm the post is ours, and save a local favorite event.
*/
function handleUnfavorite()
{
}
/**
* Hmmmm
*/
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function handleShare()
{
}
/**
* @return Ostatus_profile
*/
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function ensureProfile()
{
$actor = $this->act->actor;
common_log(LOG_DEBUG, "Received salmon bit: " . var_export($this->act, true));
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if (empty($actor->id)) {
common_log(LOG_ERR, "broken actor: " . var_export($actor, true));
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throw new Exception("Received a salmon slap from unidentified actor.");
}
return Ostatus_profile::ensureActorProfile($this->act);
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}
/**
* @fixme merge into Ostatus_profile::ensureActorProfile and friends
*/
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function createProfile()
{
$actor = $this->act->actor;
$profile = new Profile();
$profile->nickname = $this->nicknameFromURI($actor->id);
if (empty($profile->nickname)) {
$profile->nickname = common_nicknamize($actor->title);
}
$profile->fullname = $actor->title;
$profile->bio = $actor->summary; // XXX: is that right?
$profile->profileurl = $actor->link; // XXX: is that right?
$profile->created = common_sql_now();
$id = $profile->insert();
if (empty($id)) {
common_log_db_error($profile, 'INSERT', __FILE__);
throw new Exception("Couldn't save new profile for $actor->id\n");
}
// XXX: add avatars
$op = new Ostatus_profile();
$op->profile_id = $id;
$op->homeuri = $actor->id;
$op->created = $profile->created;
// XXX: determine feed URI from source or Webfinger or whatever
$id = $op->insert();
if (empty($id)) {
common_log_db_error($op, 'INSERT', __FILE__);
throw new Exception("Couldn't save new ostatus profile for $actor->id\n");
}
return $profile;
}
/**
* @fixme should be merged into Ostatus_profile
*/
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function nicknameFromURI($uri)
{
preg_match('/(\w+):/', $uri, $matches);
$protocol = $matches[1];
switch ($protocol) {
case 'acct':
case 'mailto':
if (preg_match("/^$protocol:(.*)?@.*\$/", $uri, $matches)) {
return common_canonical_nickname($matches[1]);
}
return null;
case 'http':
return common_url_to_nickname($uri);
break;
default:
return null;
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}
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}
}