gnu-social/plugins/ActivityPub/ActivityPub.php

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<?php
declare(strict_types = 1);
namespace Plugin\ActivityPub;
use App\Core\Event;
use App\Core\Modules\Plugin;
use App\Core\Router\RouteLoader;
use App\Core\Router\Router;
use App\Entity\Actor;
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use App\Entity\LocalUser;
use App\Util\Exception\NoSuchActorException;
use App\Util\Nickname;
use Exception;
use Plugin\ActivityPub\Controller\Inbox;
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use Plugin\ActivityPub\Entity\ActivitypubActor;
use Plugin\ActivityPub\Util\Response\ActorResponse;
use Plugin\ActivityPub\Util\Response\NoteResponse;
use Plugin\ActivityPub\Util\Response\TypeResponse;
use XML_XRD;
use XML_XRD_Element_Link;
class ActivityPub extends Plugin
{
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// ActivityStreams 2.0 Accept Headers
public static array $accept_headers = [
'application/ld+json; profile="https://www.w3.org/ns/activitystreams"',
'application/activity+json',
'application/json',
'application/ld+json',
];
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// So that this isn't hardcoded everywhere
public const PUBLIC_TO = ['https://www.w3.org/ns/activitystreams#Public',
'Public',
'as:Public',
];
public const HTTP_CLIENT_HEADERS = [
'Accept' => 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"',
'User-Agent' => 'GNUsocialBot ' . GNUSOCIAL_VERSION . ' - ' . GNUSOCIAL_PROJECT_URL,
];
public function version(): string
{
return '3.0.0';
}
/**
* This code executes when GNU social creates the page routing, and we hook
* on this event to add our Inbox and Outbox handler for ActivityPub.
*
* @param RouteLoader $r the router that was initialized
*/
public function onAddRoute(RouteLoader $r): bool
{
$r->connect(
'activitypub_inbox',
'/inbox.json',
[Inbox::class, 'handle'],
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options: ['accept' => self::$accept_headers, 'format' => self::$accept_headers[0]],
);
$r->connect(
'activitypub_actor_inbox',
'/actor/{gsactor_id<\d+>}/inbox.json',
[Inbox::class, 'handle'],
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options: ['accept' => self::$accept_headers, 'format' => self::$accept_headers[0]],
);
$r->connect(
'activitypub_actor_outbox',
'/actor/{gsactor_id<\d+>}/outbox.json',
[Inbox::class, 'handle'],
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options: ['accept' => self::$accept_headers, 'format' => self::$accept_headers[0]],
);
return Event::next;
}
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public static function getActorByUri(string $resource, ?bool $attempt_fetch = true): Actor
{
// Try local
if (filter_var($resource, \FILTER_VALIDATE_URL) !== false) {
// This means $resource is a valid url
$resource_parts = parse_url($resource);
// TODO: Use URLMatcher
if ($resource_parts['host'] === $_ENV['SOCIAL_DOMAIN']) { // XXX: Common::config('site', 'server')) {
$str = $resource_parts['path'];
// actor_view_nickname
$renick = '/\/@(' . Nickname::DISPLAY_FMT . ')\/?/m';
// actor_view_id
$reuri = '/\/actor\/(\d+)\/?/m';
if (preg_match_all($renick, $str, $matches, \PREG_SET_ORDER, 0) === 1) {
return LocalUser::getWithPK(['nickname' => $matches[0][1]])->getActor();
} elseif (preg_match_all($reuri, $str, $matches, \PREG_SET_ORDER, 0) === 1) {
return Actor::getById((int) $matches[0][1]);
}
}
}
// Try remote
$aprofile = ActivitypubActor::getByAddr($resource);
if ($aprofile instanceof ActivitypubActor) {
return Actor::getById($aprofile->getActorId());
} else {
throw new NoSuchActorException("From URI: {$resource}");
}
}
/**
* @throws Exception
*/
public function onControllerResponseInFormat(string $route, array $accept_header, array $vars, ?TypeResponse &$response = null): bool
{
if (\count(array_intersect(self::$accept_headers, $accept_header)) === 0) {
return Event::next;
}
switch ($route) {
case 'actor_view_id':
case 'actor_view_nickname':
$response = ActorResponse::handle($vars['actor']);
return Event::stop;
case 'note_view':
$response = NoteResponse::handle($vars['note']);
return Event::stop;
/*case 'actor_favourites_id':
case 'actor_favourites_nickname':
$response = LikeResponse::handle($vars['actor']);
return Event::stop;
case 'actor_subscriptions_id':
case 'actor_subscriptions_nickname':
$response = FollowingResponse::handle($vars['actor']);
return Event::stop;
case 'actor_subscribers_id':
case 'actor_subscribers_nickname':
$response = FollowersResponse::handle($vars['actor']);
return Event::stop;*/
default:
if (Event::handle('ActivityStreamsTwoResponse', [$route, &$response]) == Event::stop) {
return Event::stop;
}
return Event::next;
}
}
/**
* Add activity+json mimetype on WebFinger
*
* @throws Exception
*/
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public function onEndWebFingerProfileLinks(XML_XRD $xrd, Actor $object): bool
{
if ($object->isPerson()) {
$link = new XML_XRD_Element_Link(
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rel: 'self',
href: $object->getUri(Router::ABSOLUTE_URL),//Router::url('actor_view_id', ['id' => $object->getId()], Router::ABSOLUTE_URL),
type: 'application/activity+json',
);
$xrd->links[] = clone $link;
}
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return Event::next;
}
public function onFreeNetworkGenerateLocalActorUri(int $actor_id, ?array &$actor_uri): bool
{
$actor_uri['ActivityPub'] = Router::url('actor_view_id', ['id' => $actor_id], Router::ABSOLUTE_URL);
return Event::next;
}
}