gnu-social/plugins/OStatus/actions/usersalmon.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/>.
*/
if (!defined('GNUSOCIAL')) { exit(1); }
/**
* @package OStatusPlugin
* @author James Walker <james@status.net>
*/
class UsersalmonAction extends SalmonAction
{
protected function prepare(array $args=array())
{
parent::prepare($args);
$id = $this->trimmed('id');
if (!$id) {
// TRANS: Client error displayed trying to perform an action without providing an ID.
$this->clientError(_m('No ID.'));
}
$this->user = User::getKV('id', $id);
if (!$this->user instanceof User) {
// TRANS: Client error displayed when referring to a non-existing user.
$this->clientError(_m('No such user.'));
}
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$this->target = $this->user;
return true;
}
/**
* We've gotten a post event on the Salmon backchannel, probably a reply.
*
* @todo validate if we need to handle this post, then call into
* ostatus_profile's general incoming-post handling.
*/
function handlePost()
{
common_log(LOG_INFO, "Received post of '{$this->activity->objects[0]->id}' from '{$this->activity->actor->id}'");
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// @fixme: process all activity objects?
switch ($this->activity->objects[0]->type) {
case ActivityObject::ARTICLE:
case ActivityObject::BLOGENTRY:
case ActivityObject::NOTE:
case ActivityObject::STATUS:
case ActivityObject::COMMENT:
break;
default:
// TRANS: Client exception thrown when an undefied activity is performed.
throw new ClientException(_m('Cannot handle that kind of post.'));
}
// Notice must either be a) in reply to a notice by this user
// or b) in reply to a notice to the attention of this user
// or c) to the attention of this user
$context = $this->activity->context;
$notice = false;
if (!empty($context->replyToID)) {
$notice = Notice::getKV('uri', $context->replyToID);
}
if ($notice instanceof Notice &&
($notice->profile_id == $this->user->id ||
array_key_exists($this->user->id, $notice->getReplies())))
{
// In reply to a notice either from or mentioning this user.
} else if (!empty($context->attention) &&
(array_key_exists($this->user->uri, $context->attention) ||
array_key_exists($common_profile_url($this->user->nickname),
$context->attention)))
{
// To the attention of this user.
} else {
// TRANS: Client exception.
throw new ClientException(_m('Not to anyone in reply to anything.'));
}
$existing = Notice::getKV('uri', $this->activity->objects[0]->id);
if ($existing instanceof Notice) {
common_log(LOG_ERR, "Not saving notice with duplicate URI '".$existing->getUri()."' (seems it already exists).");
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return;
}
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$this->saveNotice();
}
/**
* We've gotten a follow/subscribe notification from a remote user.
* Save a subscription relationship for them.
*/
function handleFollow()
{
$oprofile = $this->ensureProfile();
if ($oprofile instanceof Ostatus_profile) {
common_log(LOG_INFO, sprintf('Setting up subscription from remote %s to local %s', $oprofile->getUri(), $this->user->getNickname()));
Subscription::start($oprofile->localProfile(),
$this->user->getProfile());
} else {
common_log(LOG_INFO, "Can't set up subscription from remote; missing profile.");
}
}
/**
* 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 instanceof Ostatus_profile) {
common_log(LOG_INFO, sprintf('Canceling subscription from remote %s to local %s', $oprofile->getUri(), $this->user->getNickname()));
try {
Subscription::cancel($oprofile->localProfile(), $this->user->getProfile());
} catch (AlreadyFulfilledException $e) {
common_debug('Subscription did not exist, so there was nothing to cancel');
}
} else {
common_log(LOG_ERR, "Can't cancel subscription from remote, didn't find the profile");
}
}
/**
* Remote user likes one of our posts.
* Confirm the post is ours, and save a local favorite event.
*/
function handleFavorite()
{
$notice = $this->getNotice($this->activity->objects[0]);
$profile = $this->ensureProfile()->localProfile();
$old = Fave::pkeyGet(array('user_id' => $profile->id,
'notice_id' => $notice->id));
if ($old instanceof Fave) {
// TRANS: Client exception.
throw new ClientException(_m('This is already a favorite.'));
}
if (!Fave::addNew($profile, $notice)) {
// TRANS: Client exception.
throw new ClientException(_m('Could not save new favorite.'));
}
}
/**
* Remote user doesn't like one of our posts after all!
* Confirm the post is ours, and save a local favorite event.
*/
function handleUnfavorite()
{
$notice = $this->getNotice($this->activity->objects[0]);
$profile = $this->ensureProfile()->localProfile();
$fave = Fave::pkeyGet(array('user_id' => $profile->id,
'notice_id' => $notice->id));
if (!$fave instanceof Fave) {
// TRANS: Client exception.
throw new ClientException(_m('Notice was not favorited!'));
}
$fave->delete();
}
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function handleTag()
{
if ($this->activity->target->type == ActivityObject::_LIST) {
if ($this->activity->objects[0]->type != ActivityObject::PERSON) {
// TRANS: Client exception.
throw new ClientException(_m('Not a person object.'));
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}
// this is a peopletag
$tagged = User::getKV('uri', $this->activity->objects[0]->id);
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if (!$tagged instanceof User) {
// TRANS: Client exception.
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throw new ClientException(_m('Unidentified profile being listed.'));
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}
if ($tagged->id !== $this->user->id) {
// TRANS: Client exception.
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throw new ClientException(_m('This user is not the one being listed.'));
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}
// save the list
$tagger = $this->ensureProfile();
$list = Ostatus_profile::ensureActivityObjectProfile($this->activity->target);
$ptag = $list->localPeopletag();
$result = Profile_tag::setTag($ptag->tagger, $tagged->id, $ptag->tag);
if (!$result) {
// TRANS: Client exception.
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throw new ClientException(_m('The listing could not be saved.'));
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}
}
}
function handleUntag()
{
if ($this->activity->target->type == ActivityObject::_LIST) {
if ($this->activity->objects[0]->type != ActivityObject::PERSON) {
// TRANS: Client exception.
throw new ClientException(_m('Not a person object.'));
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return false;
}
// this is a peopletag
$tagged = User::getKV('uri', $this->activity->objects[0]->id);
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if (!$tagged instanceof User) {
// TRANS: Client exception.
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throw new ClientException(_m('Unidentified profile being unlisted.'));
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}
if ($tagged->id !== $this->user->id) {
// TRANS: Client exception.
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throw new ClientException(_m('This user is not the one being unlisted.'));
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}
// save the list
$tagger = $this->ensureProfile();
$list = Ostatus_profile::ensureActivityObjectProfile($this->activity->target);
$ptag = $list->localPeopletag();
$result = Profile_tag::unTag($ptag->tagger, $tagged->id, $ptag->tag);
if (!$result) {
// TRANS: Client exception.
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throw new ClientException(_m('The listing could not be deleted.'));
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}
}
}
/**
* @param ActivityObject $object
* @return Notice
* @throws ClientException on invalid input
*/
function getNotice(ActivityObject $object)
{
switch ($object->type) {
case ActivityObject::ARTICLE:
case ActivityObject::BLOGENTRY:
case ActivityObject::NOTE:
case ActivityObject::STATUS:
case ActivityObject::COMMENT:
break;
default:
// TRANS: Client exception.
throw new ClientException(_m('Cannot handle that kind of object for liking/faving.'));
}
$notice = Notice::getKV('uri', $object->id);
if (!$notice instanceof Notice) {
// TRANS: Client exception. %s is an object ID.
throw new ClientException(sprintf(_m('Notice with ID %s unknown.'),$object->id));
}
if ($notice->profile_id != $this->user->id) {
// TRANS: Client exception. %1$s is a notice ID, %2$s is a user ID.
throw new ClientException(sprintf(_m('Notice with ID %1$s not posted by %2$s.'),$object->id,$this->user->id));
}
return $notice;
}
}