gnu-social/plugins/ActivityPub/lib/activitypubqueuehandler.php

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<?php
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social 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.
//
// GNU social 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 GNU social. If not, see <http://www.gnu.org/licenses/>.
/**
* ActivityPub queue handler for notice distribution
*
* @package GNUsocial
*
* @author Bruno Casteleiro <brunoccast@fc.up.pt>
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* @author Diogo Cordeiro <diogo@fc.up.pt>
* @copyright 2019-2020 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
defined('GNUSOCIAL') || die();
/**
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* @copyright 2019-2020 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
class activitypubqueuehandler extends QueueHandler
{
/**
* Getter of the queue transport name.
*
* @return string transport name
*/
public function transport(): string
{
return 'activitypub';
}
/**
* Notice distribution handler.
*
* @param Notice $notice notice to be distributed.
*
* @throws HTTP_Request2_Exception
* @throws InvalidUrlException
* @throws ServerException
*
* @return bool true on success, false otherwise
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public function handle($notice): bool
{
if (!($notice instanceof Notice)) {
common_log(LOG_ERR, 'Got a bogus notice, not distributing');
return true;
}
$profile = $notice->getProfile();
if (!$profile->isLocal()) {
return true;
}
if ($notice->source == 'activity') {
common_log(LOG_ERR, "Ignoring distribution of notice:{$notice->id}: activity source");
return true;
}
$other = Activitypub_profile::from_profile_collection(
$notice->getAttentionProfiles()
);
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try {
// Handling a Create?
if (ActivityUtils::compareVerbs($notice->verb, [ActivityVerb::POST, ActivityVerb::SHARE])) {
return $this->handle_create($profile, $notice, $other);
}
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// Handling a Like?
if (ActivityUtils::compareVerbs($notice->verb, [ActivityVerb::FAVORITE])) {
return $this->onEndFavorNotice($profile, $notice, $other);
}
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// Handling a Delete Note?
if (ActivityUtils::compareVerbs($notice->verb, [ActivityVerb::DELETE])) {
return $this->onStartDeleteOwnNotice($profile, $notice, $other);
}
} catch (Exception $e) {
// Postman handles issues with the failed queue
common_debug('ActivityPub Queue Handler:'.$e->getMessage());
}
return true;
}
/**
* Handle notice creation and propagation
*
* @param mixed $profile
* @param mixed $notice
* @param mixed $other
*/
private function handle_create($profile, $notice, $other)
{
// Handling a reply?
if ($notice->reply_to) {
try {
$parent_notice = $notice->getParent();
try {
$other[] = Activitypub_profile::from_profile($parent_notice->getProfile());
} catch (Exception $e) {
// Local user can be ignored
}
foreach ($parent_notice->getAttentionProfiles() as $mention) {
try {
$other[] = Activitypub_profile::from_profile($mention);
} catch (Exception $e) {
// Local user can be ignored
}
}
} catch (NoParentNoticeException $e) {
// This is not a reply to something (has no parent)
} catch (NoResultException $e) {
// Parent author's profile not found! Complain louder?
common_log(
LOG_ERR,
"Parent notice's author not found: " . $e->getMessage()
);
}
}
// Handling an Announce?
if ($notice->isRepeat()) {
$repeated_notice = Notice::getKV('id', $notice->repeat_of);
if ($repeated_notice instanceof Notice) {
$other = array_merge(
$other,
Activitypub_profile::from_profile_collection(
$repeated_notice->getAttentionProfiles()
)
);
try {
$other[] = Activitypub_profile::from_profile(
$repeated_notice->getProfile()
);
} catch (Exception $e) {
// Local user can be ignored
}
// That was it
$postman = new Activitypub_postman($profile, $other);
$postman->announce($notice, $repeated_notice);
}
// either made the announce or found nothing to repeat
return true;
}
// That was it
$postman = new Activitypub_postman($profile, $other);
$postman->create_note($notice);
return true;
}
/**
* Notify remote users when their notices get favourited.
*
* @param Profile $profile of local user doing the faving
* @param Notice $notice Notice being favored
* @param mixed $other
*
* @throws HTTP_Request2_Exception
* @throws InvalidUrlException
*
* @return bool return value
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public function onEndFavorNotice(Profile $profile, Notice $notice, $other)
{
$notice_liked = $notice->getParent();
if ($notice_liked->reply_to) {
try {
$parent_notice = $notice_liked->getParent();
try {
$other[] = Activitypub_profile::from_profile($parent_notice->getProfile());
} catch (Exception $e) {
// Local user can be ignored
}
$other = array_merge(
$other,
Activitypub_profile::from_profile_collection(
$parent_notice->getAttentionProfiles()
)
);
} catch (NoParentNoticeException $e) {
// This is not a reply to something (has no parent)
} catch (NoResultException $e) {
// Parent author's profile not found! Complain louder?
common_log(LOG_ERR, "Parent notice's author not found: " . $e->getMessage());
}
}
$postman = new Activitypub_postman($profile, $other);
$postman->like($notice);
return true;
}
/**
* Notify remote users when their notices get de-favourited.
*
* @param Profile $profile of local user doing the de-faving
* @param Notice $notice Notice being favored
* @param mixed $other
*
* @throws HTTP_Request2_Exception
* @throws InvalidUrlException
*
* @return bool return value
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public function onEndDisfavorNotice(Profile $profile, Notice $notice, $other)
{
if ($notice->reply_to) {
try {
$parent_notice = $notice->getParent();
try {
$other[] = Activitypub_profile::from_profile($parent_notice->getProfile());
} catch (Exception $e) {
// Local user can be ignored
}
$other = array_merge(
$other,
Activitypub_profile::from_profile_collection(
$parent_notice->getAttentionProfiles()
)
);
} catch (NoParentNoticeException $e) {
// This is not a reply to something (has no parent)
} catch (NoResultException $e) {
// Parent author's profile not found! Complain louder?
common_log(LOG_ERR, "Parent notice's author not found: " . $e->getMessage());
}
}
$postman = new Activitypub_postman($profile, $other);
$postman->undo_like($notice);
return true;
}
/**
* Notify remote users when their notices get deleted
*
* @param $user
* @param $notice
* @param mixed $profile
* @param mixed $other
*
* @throws HTTP_Request2_Exception
* @throws InvalidUrlException
*
* @return bool hook flag
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public function onStartDeleteOwnNotice($profile, $notice, $other)
{
// Handle delete locally either because:
// 1. There's no undo-share logic yet
// 2. The deleting user has privileges to do so (locally)
if ($notice->isRepeat() || ($notice->getProfile()->getID() != $profile->getID())) {
return true;
}
if ($notice->reply_to) {
try {
$parent_notice = $notice->getParent();
try {
$other[] = Activitypub_profile::from_profile($parent_notice->getProfile());
} catch (Exception $e) {
// Local user can be ignored
}
$other = array_merge(
$other,
Activitypub_profile::from_profile_collection(
$parent_notice->getAttentionProfiles()
)
);
} catch (NoParentNoticeException $e) {
// This is not a reply to something (has no parent)
} catch (NoResultException $e) {
// Parent author's profile not found! Complain louder?
common_log(LOG_ERR, "Parent notice's author not found: " . $e->getMessage());
}
}
$postman = new Activitypub_postman($profile, $other);
$postman->delete_note($notice);
return true;
}
}