3 * @copyright Copyright (C) 2010-2023, the Friendica project
5 * @license GNU AGPL version 3 or any later version
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU Affero General Public License as
9 * published by the Free Software Foundation, either version 3 of the
10 * License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU Affero General Public License for more details.
17 * You should have received a copy of the GNU Affero General Public License
18 * along with this program. If not, see <https://www.gnu.org/licenses/>.
22 namespace Friendica\Protocol\ActivityPub;
24 use Friendica\Content\Text\BBCode;
25 use Friendica\Database\DBA;
26 use Friendica\Content\Text\HTML;
27 use Friendica\Content\Text\Markdown;
28 use Friendica\Core\Logger;
29 use Friendica\Core\Protocol;
30 use Friendica\Core\System;
31 use Friendica\Core\Worker;
32 use Friendica\Database\Database;
34 use Friendica\Model\Contact;
35 use Friendica\Model\APContact;
36 use Friendica\Model\Item;
37 use Friendica\Model\Post;
38 use Friendica\Model\User;
39 use Friendica\Protocol\Activity;
40 use Friendica\Protocol\ActivityPub;
41 use Friendica\Util\DateTimeFormat;
42 use Friendica\Util\HTTPSignature;
43 use Friendica\Util\JsonLD;
44 use Friendica\Util\LDSignature;
45 use Friendica\Util\Network;
46 use Friendica\Util\Strings;
49 * ActivityPub Receiver Protocol class
54 * Check what this is meant to do:
63 const PUBLIC_COLLECTION = 'as:Public';
64 const ACCOUNT_TYPES = ['as:Person', 'as:Organization', 'as:Service', 'as:Group', 'as:Application'];
65 const CONTENT_TYPES = ['as:Note', 'as:Article', 'as:Video', 'as:Image', 'as:Event', 'as:Audio', 'as:Page', 'as:Question'];
66 const ACTIVITY_TYPES = ['as:Like', 'as:Dislike', 'as:Accept', 'as:Reject', 'as:TentativeAccept', 'as:View', 'as:Read', 'litepub:EmojiReact'];
68 const TARGET_UNKNOWN = 0;
73 const TARGET_FOLLOWER = 5;
74 const TARGET_ANSWER = 6;
75 const TARGET_GLOBAL = 7;
76 const TARGET_AUDIENCE = 8;
78 const COMPLETION_NONE = 0;
79 const COMPLETION_ANNOUNCE = 1;
80 const COMPLETION_RELAY = 2;
81 const COMPLETION_MANUAL = 3;
82 const COMPLETION_AUTO = 4;
85 * Checks incoming message from the inbox
87 * @param string $body Body string
88 * @param array $header Header lines
89 * @param integer $uid User ID
93 public static function processInbox(string $body, array $header, int $uid)
95 $activity = json_decode($body, true);
96 if (empty($activity)) {
97 Logger::warning('Invalid body.');
101 $ldactivity = JsonLD::compact($activity);
103 $actor = JsonLD::fetchElement($ldactivity, 'as:actor', '@id') ?? '';
105 $apcontact = APContact::getByURL($actor);
107 if (empty($apcontact)) {
108 Logger::notice('Unable to retrieve AP contact for actor - message is discarded', ['actor' => $actor]);
110 } elseif (APContact::isRelay($apcontact)) {
111 self::processRelayPost($ldactivity, $actor);
114 APContact::unmarkForArchival($apcontact);
117 $sig_contact = HTTPSignature::getKeyIdContact($header);
118 if (APContact::isRelay($sig_contact)) {
119 Logger::info('Message from a relay', ['url' => $sig_contact['url']]);
120 self::processRelayPost($ldactivity, $sig_contact['url']);
124 $http_signer = HTTPSignature::getSigner($body, $header);
125 if ($http_signer === false) {
126 Logger::notice('Invalid HTTP signature, message will not be trusted.', ['uid' => $uid, 'actor' => $actor, 'header' => $header, 'body' => $body]);
128 } elseif (empty($http_signer)) {
129 Logger::info('Signer is a tombstone. The message will be discarded, the signer account is deleted.');
132 Logger::info('Valid HTTP signature', ['signer' => $http_signer]);
133 $signer = [$http_signer];
136 Logger::info('Message for user ' . $uid . ' is from actor ' . $actor);
138 if ($http_signer === false) {
139 $trust_source = false;
140 } elseif (LDSignature::isSigned($activity)) {
141 $ld_signer = LDSignature::getSigner($activity);
142 if (empty($ld_signer)) {
143 Logger::info('Invalid JSON-LD signature from ' . $actor);
144 } elseif ($ld_signer != $http_signer) {
145 $signer[] = $ld_signer;
147 if (!empty($ld_signer && ($actor == $http_signer))) {
148 Logger::info('The HTTP and the JSON-LD signature belong to ' . $ld_signer);
149 $trust_source = true;
150 } elseif (!empty($ld_signer)) {
151 Logger::info('JSON-LD signature is signed by ' . $ld_signer);
152 $trust_source = true;
153 } elseif ($actor == $http_signer) {
154 Logger::info('Bad JSON-LD signature, but HTTP signer fits the actor.');
155 $trust_source = true;
157 Logger::info('Invalid JSON-LD signature and the HTTP signer is different.');
158 $trust_source = false;
160 } elseif ($actor == $http_signer) {
161 Logger::info('Trusting post without JSON-LD signature, The actor fits the HTTP signer.');
162 $trust_source = true;
164 Logger::info('No JSON-LD signature, different actor.');
165 $trust_source = false;
168 self::processActivity($ldactivity, $body, $uid, $trust_source, true, $signer, $http_signer);
172 * Process incoming posts from relays
174 * @param array $activity
175 * @param string $actor
178 private static function processRelayPost(array $activity, string $actor)
180 $type = JsonLD::fetchElement($activity, '@type');
182 Logger::notice('Empty type', ['activity' => $activity, 'actor' => $actor]);
186 $object_type = JsonLD::fetchElement($activity, 'as:object', '@type') ?? '';
188 $object_id = JsonLD::fetchElement($activity, 'as:object', '@id');
189 if (empty($object_id)) {
190 Logger::notice('No object id found', ['type' => $type, 'object_type' => $object_type, 'actor' => $actor, 'activity' => $activity]);
194 $handle = ($type == 'as:Announce');
196 if (!$handle && in_array($type, ['as:Create', 'as:Update'])) {
197 $handle = in_array($object_type, self::CONTENT_TYPES);
201 $trust_source = false;
202 $object_data = self::prepareObjectData($activity, 0, false, $trust_source);
204 if (!$trust_source) {
205 Logger::notice('Activity trust could not be achieved.', ['type' => $type, 'object_type' => $object_type, 'object_id' => $object_id, 'actor' => $actor, 'activity' => $activity]);
209 if (empty($object_data)) {
210 Logger::notice('No object data found', ['type' => $type, 'object_type' => $object_type, 'object_id' => $object_id, 'actor' => $actor, 'activity' => $activity]);
214 if (self::routeActivities($object_data, $type, true)) {
215 Logger::debug('Handled activity', ['type' => $type, 'object_type' => $object_type, 'object_id' => $object_id, 'actor' => $actor]);
217 Logger::info('Unhandled activity', ['type' => $type, 'object_type' => $object_type, 'object_id' => $object_id, 'actor' => $actor, 'activity' => $activity]);
222 $contact = Contact::getByURL($actor);
223 if (empty($contact)) {
224 Logger::info('Relay contact not found', ['actor' => $actor]);
228 if (!in_array($contact['rel'], [Contact::SHARING, Contact::FRIEND])) {
229 Logger::notice('Relay is no sharer', ['actor' => $actor]);
233 Logger::debug('Got relayed message id', ['id' => $object_id, 'actor' => $actor]);
235 $item_id = Item::searchByLink($object_id);
237 Logger::info('Relayed message already exists', ['id' => $object_id, 'item' => $item_id, 'actor' => $actor]);
241 $id = Processor::fetchMissingActivity($object_id, [], $actor, self::COMPLETION_RELAY);
243 Logger::notice('Relayed message had not been fetched', ['id' => $object_id, 'actor' => $actor]);
249 * Fetches the object type for a given object id
251 * @param array $activity
252 * @param string $object_id Object ID of the provided object
253 * @param integer $uid User ID
255 * @return string with object type or NULL
256 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
257 * @throws \ImagickException
259 public static function fetchObjectType(array $activity, string $object_id, int $uid = 0)
261 if (!empty($activity['as:object'])) {
262 $object_type = JsonLD::fetchElement($activity['as:object'], '@type');
263 if (!empty($object_type)) {
268 if (Post::exists(['uri' => $object_id, 'gravity' => [Item::GRAVITY_PARENT, Item::GRAVITY_COMMENT]])) {
269 // We just assume "note" since it doesn't make a difference for the further processing
273 $profile = APContact::getByURL($object_id);
274 if (!empty($profile['type'])) {
275 APContact::unmarkForArchival($profile);
276 return 'as:' . $profile['type'];
279 $data = Processor::fetchCachedActivity($object_id, $uid);
281 $object = JsonLD::compact($data);
282 $type = JsonLD::fetchElement($object, '@type');
292 * Prepare the object array
294 * @param array $activity Array with activity data
295 * @param integer $uid User ID
296 * @param boolean $push Message had been pushed to our system
297 * @param boolean $trust_source Do we trust the source?
299 * @return array with object data
300 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
301 * @throws \ImagickException
303 public static function prepareObjectData(array $activity, int $uid, bool $push, bool &$trust_source): array
305 $id = JsonLD::fetchElement($activity, '@id');
306 $type = JsonLD::fetchElement($activity, '@type');
307 $object_id = JsonLD::fetchElement($activity, 'as:object', '@id');
309 if (!empty($object_id) && in_array($type, ['as:Create', 'as:Update'])) {
310 $fetch_id = $object_id;
315 if (!empty($activity['as:object'])) {
316 $object_type = JsonLD::fetchElement($activity['as:object'], '@type');
321 if (!empty($id) && !$trust_source) {
322 $fetch_uid = $uid ?: self::getBestUserForActivity($activity);
324 $fetched_activity = Processor::fetchCachedActivity($fetch_id, $fetch_uid);
325 if (!empty($fetched_activity)) {
327 $object = JsonLD::compact($fetched_activity);
329 $fetched_id = JsonLD::fetchElement($object, '@id');
330 $fetched_type = JsonLD::fetchElement($object, '@type');
332 if (($fetched_id == $id) && !empty($fetched_type) && ($fetched_type == $type)) {
333 Logger::info('Activity had been fetched successfully', ['id' => $id]);
334 $trust_source = true;
336 } elseif (($fetched_id == $object_id) && !empty($fetched_type) && ($fetched_type == $object_type)) {
337 Logger::info('Fetched data is the object instead of the activity', ['id' => $id]);
338 $trust_source = true;
339 unset($object['@context']);
340 $activity['as:object'] = $object;
342 Logger::info('Activity id is not equal', ['id' => $id, 'fetched' => $fetched_id]);
345 Logger::info('Activity could not been fetched', ['id' => $id]);
349 $actor = JsonLD::fetchElement($activity, 'as:actor', '@id');
351 Logger::info('Empty actor', ['activity' => $activity]);
355 $type = JsonLD::fetchElement($activity, '@type');
357 // Fetch all receivers from to, cc, bto and bcc
358 $receiverdata = self::getReceivers($activity, $actor, [], false, $push || $fetched);
359 $receivers = $reception_types = [];
360 foreach ($receiverdata as $key => $data) {
361 $receivers[$key] = $data['uid'];
362 $reception_types[$data['uid']] = $data['type'] ?? self::TARGET_UNKNOWN;
365 $urls = self::getReceiverURL($activity);
367 // When it is a delivery to a personal inbox we add that user to the receivers
369 $additional = [$uid => $uid];
370 $receivers = array_replace($receivers, $additional);
371 if (empty($activity['thread-completion']) && (empty($reception_types[$uid]) || in_array($reception_types[$uid], [self::TARGET_UNKNOWN, self::TARGET_FOLLOWER, self::TARGET_ANSWER, self::TARGET_GLOBAL]))) {
372 $reception_types[$uid] = self::TARGET_BCC;
373 $owner = User::getOwnerDataById($uid);
374 if (!empty($owner['url'])) {
375 $urls['as:bcc'][] = $owner['url'];
380 // We possibly need some user to fetch private content,
381 // so we fetch one out of the receivers if no uid is provided.
382 $fetch_uid = $uid ?: self::getBestUserForActivity($activity);
384 $object_id = JsonLD::fetchElement($activity, 'as:object', '@id');
385 if (empty($object_id)) {
386 Logger::info('No object found');
390 if (!is_string($object_id)) {
391 Logger::info('Invalid object id', ['object' => $object_id]);
395 $object_type = self::fetchObjectType($activity, $object_id, $fetch_uid);
397 // Fetch the activity on Lemmy "Announce" messages (announces of activities)
398 if (($type == 'as:Announce') && in_array($object_type, array_merge(self::ACTIVITY_TYPES, ['as:Delete', 'as:Undo', 'as:Update']))) {
399 Logger::debug('Fetch announced activity', ['object' => $object_id]);
400 $data = Processor::fetchCachedActivity($object_id, $fetch_uid);
402 $type = $object_type;
403 $activity = JsonLD::compact($data);
405 // Some variables need to be refetched since the activity changed
406 $actor = JsonLD::fetchElement($activity, 'as:actor', '@id');
407 $object_id = JsonLD::fetchElement($activity, 'as:object', '@id');
408 $object_type = self::fetchObjectType($activity, $object_id, $fetch_uid);
412 // Any activities on account types must not be altered
413 if (in_array($type, ['as:Flag'])) {
415 $object_data['id'] = JsonLD::fetchElement($activity, '@id');
416 $object_data['object_id'] = JsonLD::fetchElement($activity, 'as:object', '@id');
417 $object_data['object_ids'] = JsonLD::fetchElementArray($activity, 'as:object', '@id');
418 $object_data['content'] = JsonLD::fetchElement($activity, 'as:content', '@type');
419 } elseif (in_array($object_type, self::ACCOUNT_TYPES)) {
421 $object_data['id'] = JsonLD::fetchElement($activity, '@id');
422 $object_data['object_id'] = JsonLD::fetchElement($activity, 'as:object', '@id');
423 $object_data['object_actor'] = JsonLD::fetchElement($activity['as:object'], 'as:actor', '@id');
424 $object_data['object_object'] = JsonLD::fetchElement($activity['as:object'], 'as:object');
425 $object_data['object_type'] = JsonLD::fetchElement($activity['as:object'], '@type');
426 if (!$trust_source && ($type == 'as:Delete')) {
427 $apcontact = APContact::getByURL($object_data['object_id'], true);
428 $trust_source = empty($apcontact) || ($apcontact['type'] == 'Tombstone') || $apcontact['suspended'];
430 } elseif (in_array($type, ['as:Create', 'as:Update', 'as:Invite']) || strpos($type, '#emojiReaction')) {
431 // Fetch the content only on activities where this matters
432 // We can receive "#emojiReaction" when fetching content from Hubzilla systems
433 $object_data = self::fetchObject($object_id, $activity['as:object'], $trust_source, $fetch_uid);
434 if (empty($object_data)) {
435 Logger::info("Object data couldn't be processed");
439 $object_data['object_id'] = $object_id;
441 // Test if it is an answer to a mail
442 if (DBA::exists('mail', ['uri' => $object_data['reply-to-id']])) {
443 $object_data['directmessage'] = true;
445 $object_data['directmessage'] = JsonLD::fetchElement($activity, 'litepub:directMessage');
447 } elseif (in_array($type, array_merge(self::ACTIVITY_TYPES, ['as:Announce', 'as:Follow'])) && in_array($object_type, self::CONTENT_TYPES)) {
448 // Create a mostly empty array out of the activity data (instead of the object).
449 // This way we later don't have to check for the existence of each individual array element.
450 $object_data = self::processObject($activity);
451 $object_data['name'] = $type;
452 $object_data['author'] = JsonLD::fetchElement($activity, 'as:actor', '@id');
453 $object_data['object_id'] = $object_id;
454 $object_data['object_type'] = ''; // Since we don't fetch the object, we don't know the type
455 } elseif (in_array($type, ['as:Add', 'as:Remove', 'as:Move'])) {
457 $object_data['id'] = JsonLD::fetchElement($activity, '@id');
458 $object_data['target_id'] = JsonLD::fetchElement($activity, 'as:target', '@id');
459 $object_data['object_id'] = JsonLD::fetchElement($activity, 'as:object', '@id');
460 $object_data['object_type'] = JsonLD::fetchElement($activity['as:object'], '@type');
461 $object_data['object_content'] = JsonLD::fetchElement($activity['as:object'], 'as:content', '@type');
464 $object_data['id'] = JsonLD::fetchElement($activity, '@id');
465 $object_data['object_id'] = JsonLD::fetchElement($activity, 'as:object', '@id');
466 $object_data['object_actor'] = JsonLD::fetchElement($activity['as:object'], 'as:actor', '@id');
467 $object_data['object_object'] = JsonLD::fetchElement($activity['as:object'], 'as:object');
468 $object_data['object_type'] = JsonLD::fetchElement($activity['as:object'], '@type');
470 // An Undo is done on the object of an object, so we need that type as well
471 if (($type == 'as:Undo') && !empty($object_data['object_object'])) {
472 $object_data['object_object_type'] = self::fetchObjectType([], $object_data['object_object'], $fetch_uid);
475 if (!$trust_source && ($type == 'as:Delete') && in_array($object_data['object_type'], array_merge(['as:Tombstone', ''], self::CONTENT_TYPES))) {
476 $trust_source = Processor::isActivityGone($object_data['object_id']);
477 if (!$trust_source) {
478 $trust_source = !empty(APContact::getByURL($object_data['object_id'], false));
483 $object_data['push'] = $push;
485 $object_data = self::addActivityFields($object_data, $activity);
487 if (empty($object_data['object_type'])) {
488 $object_data['object_type'] = $object_type;
491 foreach (['as:to', 'as:cc', 'as:bto', 'as:bcc', 'as:audience', 'as:attributedTo'] as $element) {
492 if ((empty($object_data['receiver_urls'][$element]) || in_array($element, ['as:bto', 'as:bcc'])) && !empty($urls[$element])) {
493 $object_data['receiver_urls'][$element] = array_unique(array_merge($object_data['receiver_urls'][$element] ?? [], $urls[$element]));
497 $object_data['type'] = $type;
498 $object_data['actor'] = $actor;
499 $object_data['item_receiver'] = $receivers;
500 $object_data['receiver'] = array_replace($object_data['receiver'] ?? [], $receivers);
501 $object_data['reception_type'] = array_replace($object_data['reception_type'] ?? [], $reception_types);
503 // This check here interferes with Hubzilla posts where the author host differs from the host the post was created
504 // $author = $object_data['author'] ?? $actor;
505 // if (!empty($author) && !empty($object_data['id'])) {
506 // $author_host = parse_url($author, PHP_URL_HOST);
507 // $id_host = parse_url($object_data['id'], PHP_URL_HOST);
508 // if ($author_host == $id_host) {
509 // Logger::info('Valid hosts', ['type' => $type, 'host' => $id_host]);
511 // Logger::notice('Differing hosts on author and id', ['type' => $type, 'author' => $author_host, 'id' => $id_host]);
512 // $trust_source = false;
516 $account = Contact::selectFirstAccount(['platform'], ['nurl' => Strings::normaliseLink($actor)]);
517 $platform = $account['platform'] ?? '';
519 Logger::info('Processing', ['type' => $object_data['type'], 'object_type' => $object_data['object_type'], 'id' => $object_data['id'], 'actor' => $actor, 'platform' => $platform]);
525 * Fetches the first user id from the receiver array
527 * @param array $receivers Array with receivers
528 * @return integer user id;
530 public static function getFirstUserFromReceivers(array $receivers): int
532 foreach ($receivers as $receiver) {
533 if (!empty($receiver)) {
541 * Processes the activity object
543 * @param array $activity Array with activity data
544 * @param string $body The unprocessed body
545 * @param int|null $uid User ID
546 * @param boolean $trust_source Do we trust the source?
547 * @param boolean $push Message had been pushed to our system
548 * @param array $signer The signer of the post
552 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
553 * @throws \ImagickException
555 public static function processActivity(array $activity, string $body = '', int $uid = null, bool $trust_source = false, bool $push = false, array $signer = [], string $http_signer = '', int $completion = Receiver::COMPLETION_AUTO): bool
557 $type = JsonLD::fetchElement($activity, '@type');
559 Logger::info('Empty type', ['activity' => $activity]);
563 if (!DI::config()->get('system', 'process_view') && ($type == 'as:View')) {
564 Logger::info('View activities are ignored.', ['signer' => $signer, 'http_signer' => $http_signer]);
568 if (!JsonLD::fetchElement($activity, 'as:object', '@id')) {
569 Logger::info('Empty object', ['activity' => $activity]);
573 $actor = JsonLD::fetchElement($activity, 'as:actor', '@id');
575 Logger::info('Empty actor', ['activity' => $activity]);
579 if (is_array($activity['as:object'])) {
580 $attributed_to = JsonLD::fetchElement($activity['as:object'], 'as:attributedTo', '@id');
585 // Test the provided signatures against the actor and "attributedTo"
587 if (!empty($attributed_to) && !empty($actor)) {
588 $trust_source = (in_array($actor, $signer) && in_array($attributed_to, $signer));
590 $trust_source = in_array($actor, $signer);
594 // $trust_source is called by reference and is set to true if the content was retrieved successfully
595 $object_data = self::prepareObjectData($activity, $uid, $push, $trust_source);
596 if (empty($object_data)) {
597 Logger::info('No object data found', ['activity' => $activity]);
601 // Lemmy is announcing activities.
602 // We are changing the announces into regular activities.
603 if (($type == 'as:Announce') && in_array($object_data['type'] ?? '', array_merge(self::ACTIVITY_TYPES, ['as:Delete', 'as:Undo', 'as:Update']))) {
604 Logger::debug('Change type of announce to activity', ['type' => $object_data['type']]);
605 $type = $object_data['type'];
608 if (!empty($body) && empty($object_data['raw'])) {
609 $object_data['raw'] = $body;
612 // Internal flag for thread completion. See Processor.php
613 if (!empty($activity['thread-completion'])) {
614 $object_data['thread-completion'] = $activity['thread-completion'];
617 if (!empty($activity['completion-mode'])) {
618 $object_data['completion-mode'] = $activity['completion-mode'];
621 if (!empty($activity['thread-children-type'])) {
622 $object_data['thread-children-type'] = $activity['thread-children-type'];
625 // Internal flag for posts that arrived via relay
626 if (!empty($activity['from-relay'])) {
627 $object_data['from-relay'] = $activity['from-relay'];
630 if ($type == 'as:Announce') {
631 $object_data['object_activity'] = $activity;
634 if (($type == 'as:Create') && $trust_source && !in_array($completion, [self::COMPLETION_MANUAL, self::COMPLETION_ANNOUNCE])) {
635 if (self::hasArrived($object_data['object_id'])) {
636 Logger::info('The activity already arrived.', ['id' => $object_data['object_id']]);
639 self::addArrivedId($object_data['object_id']);
641 if (Queue::exists($object_data['object_id'], $type)) {
642 Logger::info('The activity is already added.', ['id' => $object_data['object_id']]);
645 } elseif (($type == 'as:Create') && $trust_source && !self::hasArrived($object_data['object_id'])) {
646 self::addArrivedId($object_data['object_id']);
649 $decouple = DI::config()->get('system', 'decoupled_receiver') && !in_array($completion, [self::COMPLETION_MANUAL, self::COMPLETION_ANNOUNCE]);
651 if ($decouple && ($trust_source || DI::config()->get('debug', 'ap_inbox_store_untrusted'))) {
652 $object_data = Queue::add($object_data, $type, $uid, $http_signer, $push, $trust_source);
655 if (!$trust_source) {
656 Logger::info('Activity trust could not be achieved.', ['id' => $object_data['object_id'], 'type' => $type, 'signer' => $signer, 'actor' => $actor, 'attributedTo' => $attributed_to]);
660 if (!empty($object_data['entry-id']) && $decouple && ($push || ($completion == self::COMPLETION_RELAY))) {
661 if (Queue::isProcessable($object_data['entry-id'])) {
662 // We delay by 5 seconds to allow to accumulate all receivers
663 $delayed = date(DateTimeFormat::MYSQL, time() + 5);
664 Logger::debug('Initiate processing', ['id' => $object_data['entry-id'], 'uri' => $object_data['object_id']]);
665 $wid = Worker::add(['priority' => Worker::PRIORITY_HIGH, 'delayed' => $delayed], 'ProcessQueue', $object_data['entry-id']);
666 Queue::setWorkerId($object_data['entry-id'], $wid);
668 Logger::debug('Other queue entries need to be processed first.', ['id' => $object_data['entry-id']]);
673 if (!empty($activity['recursion-depth'])) {
674 $object_data['recursion-depth'] = $activity['recursion-depth'];
677 if (!self::routeActivities($object_data, $type, $push, true, $uid)) {
678 self::storeUnhandledActivity(true, $type, $object_data, $activity, $body, $uid, $trust_source, $push, $signer);
679 Queue::remove($object_data);
687 * @param array $object_data
688 * @param string $type
690 * @param bool $fetch_parents
693 * @return boolean Could the activity be routed?
695 public static function routeActivities(array $object_data, string $type, bool $push, bool $fetch_parents = true, int $uid = 0): bool
699 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
700 $item = ActivityPub\Processor::createItem($object_data, $fetch_parents);
701 ActivityPub\Processor::postItem($object_data, $item);
702 } elseif (in_array($object_data['object_type'], ['pt:CacheFile'])) {
703 // Unhandled Peertube activity
704 Queue::remove($object_data);
705 } elseif (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
706 ActivityPub\Processor::updatePerson($object_data);
713 if (in_array($object_data['object_type'], ['as:Event'])) {
714 $item = ActivityPub\Processor::createItem($object_data, $fetch_parents);
715 ActivityPub\Processor::postItem($object_data, $item);
722 if ($object_data['object_type'] == 'as:tag') {
723 ActivityPub\Processor::addTag($object_data);
724 } elseif (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
725 ActivityPub\Processor::addToFeaturedCollection($object_data);
726 } elseif (in_array($object_data['object_type'], ['as:Tombstone', ''])) {
727 // We don't have the object here or it is deleted. We ignore this activity.
728 Queue::remove($object_data);
735 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
736 if (!Item::searchByLink($object_data['object_id'], $uid)) {
737 if (ActivityPub\Processor::fetchMissingActivity($object_data['object_id'], [], $object_data['actor'], self::COMPLETION_ANNOUNCE, $uid)) {
738 Logger::debug('Created announced id', ['uid' => $uid, 'id' => $object_data['object_id']]);
739 Queue::remove($object_data);
741 Logger::debug('Announced id was not created', ['uid' => $uid, 'id' => $object_data['object_id']]);
742 Queue::remove($object_data);
746 Logger::info('Announced id already exists', ['uid' => $uid, 'id' => $object_data['object_id']]);
747 Queue::remove($object_data);
750 ActivityPub\Processor::createActivity($object_data, Activity::ANNOUNCE);
751 } elseif (in_array($object_data['object_type'], ['as:Tombstone', ''])) {
752 // We don't have the object here or it is deleted. We ignore this activity.
753 Queue::remove($object_data);
760 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
761 ActivityPub\Processor::createActivity($object_data, Activity::LIKE);
762 } elseif (in_array($object_data['object_type'], ['as:Tombstone', ''])) {
763 // We don't have the object here or it is deleted. We ignore this activity.
764 Queue::remove($object_data);
771 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
772 ActivityPub\Processor::createActivity($object_data, Activity::DISLIKE);
773 } elseif (in_array($object_data['object_type'], ['as:Tombstone', ''])) {
774 // We don't have the object here or it is deleted. We ignore this activity.
775 Queue::remove($object_data);
781 case 'as:TentativeAccept':
782 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
783 ActivityPub\Processor::createActivity($object_data, Activity::ATTENDMAYBE);
790 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
791 ActivityPub\Processor::updateItem($object_data);
792 } elseif (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
793 ActivityPub\Processor::updatePerson($object_data);
794 } elseif (in_array($object_data['object_type'], ['pt:CacheFile'])) {
795 // Unhandled Peertube activity
796 Queue::remove($object_data);
803 if (in_array($object_data['object_type'], array_merge(['as:Tombstone'], self::CONTENT_TYPES))) {
804 ActivityPub\Processor::deleteItem($object_data);
805 } elseif (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
806 ActivityPub\Processor::deletePerson($object_data);
807 } elseif ($object_data['object_type'] == '') {
808 // The object type couldn't be determined. Most likely we don't have it here. We ignore this activity.
809 Queue::remove($object_data);
816 if (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
817 ActivityPub\Processor::movePerson($object_data);
824 if (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
825 ActivityPub\Processor::blockAccount($object_data);
832 if (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
833 ActivityPub\Processor::ReportAccount($object_data);
840 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
841 ActivityPub\Processor::removeFromFeaturedCollection($object_data);
842 } elseif (in_array($object_data['object_type'], ['as:Tombstone', ''])) {
843 // We don't have the object here or it is deleted. We ignore this activity.
844 Queue::remove($object_data);
851 if (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
852 ActivityPub\Processor::followUser($object_data);
853 } elseif (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
854 $object_data['reply-to-id'] = $object_data['object_id'];
855 ActivityPub\Processor::createActivity($object_data, Activity::FOLLOW);
862 if ($object_data['object_type'] == 'as:Follow') {
863 if (!empty($object_data['object_actor'])) {
864 ActivityPub\Processor::acceptFollowUser($object_data);
866 Logger::notice('Unhandled "accept follow" message.', ['object_data' => $object_data]);
868 } elseif (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
869 ActivityPub\Processor::createActivity($object_data, Activity::ATTEND);
870 } elseif (!empty($object_data['object_id']) && empty($object_data['object_actor']) && empty($object_data['object_type'])) {
871 // Follow acceptances from gup.pe only contain the object id
872 ActivityPub\Processor::acceptFollowUser($object_data);
879 if ($object_data['object_type'] == 'as:Follow') {
880 ActivityPub\Processor::rejectFollowUser($object_data);
881 } elseif (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
882 ActivityPub\Processor::createActivity($object_data, Activity::ATTENDNO);
889 if (($object_data['object_type'] == 'as:Follow') &&
890 in_array($object_data['object_object_type'], self::ACCOUNT_TYPES)) {
891 ActivityPub\Processor::undoFollowUser($object_data);
892 } elseif (($object_data['object_type'] == 'as:Follow') &&
893 in_array($object_data['object_object_type'], self::CONTENT_TYPES)) {
894 ActivityPub\Processor::undoActivity($object_data);
895 } elseif (($object_data['object_type'] == 'as:Accept') &&
896 in_array($object_data['object_object_type'], self::ACCOUNT_TYPES)) {
897 ActivityPub\Processor::rejectFollowUser($object_data);
898 } elseif (($object_data['object_type'] == 'as:Block') &&
899 in_array($object_data['object_object_type'], self::ACCOUNT_TYPES)) {
900 ActivityPub\Processor::unblockAccount($object_data);
901 } elseif (in_array($object_data['object_type'], array_merge(self::ACTIVITY_TYPES, ['as:Announce', 'as:Create', ''])) &&
902 empty($object_data['object_object_type'])) {
903 // We cannot detect the target object. So we can ignore it.
904 Queue::remove($object_data);
905 } elseif (in_array($object_data['object_type'], array_merge(self::ACTIVITY_TYPES, ['as:Announce'])) &&
906 in_array($object_data['object_object_type'], array_merge(['as:Tombstone'], self::CONTENT_TYPES))) {
907 ActivityPub\Processor::undoActivity($object_data);
908 } elseif (in_array($object_data['object_type'], ['as:Create']) &&
909 in_array($object_data['object_object_type'], ['pt:CacheFile'])) {
910 // Unhandled Peertube activity
911 Queue::remove($object_data);
912 } elseif (in_array($object_data['object_type'], ['as:Delete'])) {
913 // We cannot undo deletions, so we just ignore this
914 Queue::remove($object_data);
915 } elseif (in_array($object_data['object_object_type'], ['as:Tombstone'])) {
916 // The object is a tombstone, we ignore any actions on it.
917 Queue::remove($object_data);
924 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
925 ActivityPub\Processor::createActivity($object_data, Activity::VIEW);
926 } elseif (in_array($object_data['object_type'], ['as:Tombstone', ''])) {
927 // We don't have the object here or it is deleted. We ignore this activity.
928 Queue::remove($object_data);
934 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
935 ActivityPub\Processor::createActivity($object_data, Activity::READ);
936 } elseif (in_array($object_data['object_type'], ['as:Tombstone', ''])) {
937 // We don't have the object here or it is deleted. We ignore this activity.
938 Queue::remove($object_data);
944 case 'litepub:EmojiReact':
945 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
946 ActivityPub\Processor::createActivity($object_data, Activity::EMOJIREACT);
947 } elseif (in_array($object_data['object_type'], ['as:Tombstone', ''])) {
948 // We don't have the object here or it is deleted. We ignore this activity.
949 Queue::remove($object_data);
956 Logger::info('Unknown activity: ' . $type . ' ' . $object_data['object_type']);
963 * Stores unhandled or unknown Activities as a file
965 * @param boolean $unknown "true" if the activity is unknown, "false" if it is unhandled
966 * @param string $type Activity type
967 * @param array $object_data Preprocessed array that is generated out of the received activity
968 * @param array $activity Array with activity data
969 * @param string $body The unprocessed body
970 * @param integer $uid User ID
971 * @param boolean $trust_source Do we trust the source?
972 * @param boolean $push Message had been pushed to our system
973 * @param array $signer The signer of the post
976 private static function storeUnhandledActivity(bool $unknown, string $type, array $object_data, array $activity, string $body = '', int $uid = null, bool $trust_source = false, bool $push = false, array $signer = [])
978 if (!DI::config()->get('debug', 'ap_log_unknown')) {
982 $file = ($unknown ? 'unknown-' : 'unhandled-') . str_replace(':', '-', $type) . '-';
984 if (!empty($object_data['object_type'])) {
985 $file .= str_replace(':', '-', $object_data['object_type']) . '-';
988 if (!empty($object_data['object_object_type'])) {
989 $file .= str_replace(':', '-', $object_data['object_object_type']) . '-';
992 $tempfile = tempnam(System::getTempPath(), $file);
993 file_put_contents($tempfile, json_encode(['activity' => $activity, 'body' => $body, 'uid' => $uid, 'trust_source' => $trust_source, 'push' => $push, 'signer' => $signer, 'object_data' => $object_data], JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT));
994 Logger::notice('Unknown activity stored', ['type' => $type, 'object_type' => $object_data['object_type'], 'object_object_type' => $object_data['object_object_type'] ?? '', 'file' => $tempfile]);
998 * Fetch a user id from an activity array
1000 * @param array $activity
1001 * @param string $actor
1003 * @return int user id
1005 public static function getBestUserForActivity(array $activity): int
1008 $actor = JsonLD::fetchElement($activity, 'as:actor', '@id') ?? '';
1010 $receivers = self::getReceivers($activity, $actor, [], false, false);
1011 foreach ($receivers as $receiver) {
1012 if ($receiver['type'] == self::TARGET_GLOBAL) {
1015 if (empty($uid) || ($receiver['type'] == self::TARGET_TO)) {
1016 $uid = $receiver['uid'];
1020 // When we haven't found any user yet, we just chose a user who most likely could have access to the content
1022 $contact = Contact::selectFirst(['uid'], ['nurl' => Strings::normaliseLink($actor), 'rel' => [Contact::SHARING, Contact::FRIEND]]);
1023 if (!empty($contact['uid'])) {
1024 $uid = $contact['uid'];
1031 // @TODO Missing documentation
1032 public static function getReceiverURL(array $activity): array
1036 foreach (['as:to', 'as:cc', 'as:bto', 'as:bcc', 'as:audience', 'as:attributedTo'] as $element) {
1037 $receiver_list = JsonLD::fetchElementArray($activity, $element, '@id');
1038 if (empty($receiver_list)) {
1042 foreach ($receiver_list as $receiver) {
1043 if ($receiver == 'Public') {
1044 Logger::warning('Not compacted public collection found', ['activity' => $activity, 'callstack' => System::callstack(20)]);
1045 $receiver = ActivityPub::PUBLIC_COLLECTION;
1047 if ($receiver == self::PUBLIC_COLLECTION) {
1048 $receiver = ActivityPub::PUBLIC_COLLECTION;
1050 $urls[$element][] = $receiver;
1058 * Fetch the receiver list from an activity array
1060 * @param array $activity
1061 * @param string $actor
1062 * @param array $tags
1063 * @param bool $fetch_unlisted
1066 * @return array with receivers (user id)
1067 * @throws \Exception
1069 private static function getReceivers(array $activity, string $actor, array $tags, bool $fetch_unlisted, bool $push): array
1071 $reply = $receivers = $profile = [];
1073 // When it is an answer, we inherit the receivers from the parent
1074 $replyto = JsonLD::fetchElement($activity, 'as:inReplyTo', '@id');
1075 if (!empty($replyto)) {
1076 $reply = [$replyto];
1078 // Fix possibly wrong item URI (could be an answer to a plink uri)
1079 $fixedReplyTo = Item::getURIByLink($replyto);
1080 if (!empty($fixedReplyTo)) {
1081 $reply[] = $fixedReplyTo;
1085 // Fetch all posts that refer to the object id
1086 $object_id = JsonLD::fetchElement($activity, 'as:object', '@id');
1087 if (!empty($object_id)) {
1088 $reply[] = $object_id;
1091 if (!empty($actor)) {
1092 $profile = APContact::getByURL($actor);
1093 $followers = $profile['followers'] ?? '';
1094 $is_forum = ($actor['type'] ?? '') == 'Group';
1096 Contact::updateByUrlIfNeeded($actor);
1098 Logger::info('Got actor and followers', ['actor' => $actor, 'followers' => $followers]);
1100 Logger::info('Empty actor', ['activity' => $activity]);
1105 // We have to prevent false follower assumptions upon thread completions
1106 $follower_target = empty($activity['thread-completion']) ? self::TARGET_FOLLOWER : self::TARGET_UNKNOWN;
1108 foreach (['as:to', 'as:cc', 'as:bto', 'as:bcc','as:audience'] as $element) {
1109 $receiver_list = JsonLD::fetchElementArray($activity, $element, '@id');
1110 if (empty($receiver_list)) {
1114 foreach ($receiver_list as $receiver) {
1115 if ($receiver == self::PUBLIC_COLLECTION) {
1116 $receivers[0] = ['uid' => 0, 'type' => self::TARGET_GLOBAL];
1119 // Add receiver "-1" for unlisted posts
1120 if ($fetch_unlisted && ($receiver == self::PUBLIC_COLLECTION) && ($element == 'as:cc')) {
1121 $receivers[-1] = ['uid' => -1, 'type' => self::TARGET_GLOBAL];
1124 // Fetch the receivers for the public and the followers collection
1125 if ((($receiver == $followers) || (($receiver == self::PUBLIC_COLLECTION) && !$is_forum)) && !empty($actor)) {
1126 $receivers = self::getReceiverForActor($actor, $tags, $receivers, $follower_target, $profile);
1130 // Fetching all directly addressed receivers
1131 $condition = ['self' => true, 'nurl' => Strings::normaliseLink($receiver)];
1132 $contact = DBA::selectFirst('contact', ['uid', 'contact-type'], $condition);
1133 if (!DBA::isResult($contact)) {
1137 // Check if the potential receiver is following the actor
1138 // Exception: The receiver is targetted via "to" or this is a comment
1139 if ((($element != 'as:to') && empty($replyto)) || ($contact['contact-type'] == Contact::TYPE_COMMUNITY)) {
1140 $networks = Protocol::FEDERATED;
1141 $condition = ['nurl' => Strings::normaliseLink($actor), 'rel' => [Contact::SHARING, Contact::FRIEND],
1142 'network' => $networks, 'archive' => false, 'pending' => false, 'uid' => $contact['uid']];
1144 // Forum posts are only accepted from forum contacts
1145 if ($contact['contact-type'] == Contact::TYPE_COMMUNITY) {
1146 $condition['rel'] = [Contact::SHARING, Contact::FRIEND, Contact::FOLLOWER];
1149 if (!DBA::exists('contact', $condition)) {
1154 $type = $receivers[$contact['uid']]['type'] ?? self::TARGET_UNKNOWN;
1155 if (in_array($type, [self::TARGET_UNKNOWN, self::TARGET_FOLLOWER, self::TARGET_ANSWER, self::TARGET_GLOBAL])) {
1158 $type = self::TARGET_TO;
1161 $type = self::TARGET_CC;
1164 $type = self::TARGET_BTO;
1167 $type = self::TARGET_BCC;
1170 $type = self::TARGET_AUDIENCE;
1174 $receivers[$contact['uid']] = ['uid' => $contact['uid'], 'type' => $type];
1179 if (!empty($reply) && (!empty($receivers[0]) || !empty($receivers[-1]))) {
1180 $parents = Post::select(['uid'], DBA::mergeConditions(['uri' => $reply], ["`uid` != ?", 0]));
1181 while ($parent = Post::fetch($parents)) {
1182 $receivers[$parent['uid']] = ['uid' => $parent['uid'], 'type' => self::TARGET_ANSWER];
1184 DBA::close($parents);
1187 self::switchContacts($receivers, $actor);
1189 // "birdsitelive" is a service that mirrors tweets into the fediverse
1190 // These posts can be fetched without authentication, but are not marked as public
1191 // We treat them as unlisted posts to be able to handle them.
1192 if (empty($receivers) && $fetch_unlisted && Contact::isPlatform($actor, 'birdsitelive')) {
1193 $receivers[0] = ['uid' => 0, 'type' => self::TARGET_GLOBAL];
1194 $receivers[-1] = ['uid' => -1, 'type' => self::TARGET_GLOBAL];
1195 Logger::notice('Post from "birdsitelive" is set to "unlisted"', ['id' => JsonLD::fetchElement($activity, '@id')]);
1196 } elseif (empty($receivers)) {
1197 Logger::notice('Post has got no receivers', ['fetch_unlisted' => $fetch_unlisted, 'actor' => $actor, 'id' => JsonLD::fetchElement($activity, '@id'), 'type' => JsonLD::fetchElement($activity, '@type')]);
1204 * Fetch the receiver list of a given actor
1206 * @param string $actor
1207 * @param array $tags
1208 * @param array $receivers
1209 * @param integer $target_type
1210 * @param array $profile
1212 * @return array with receivers (user id)
1213 * @throws \Exception
1215 private static function getReceiverForActor(string $actor, array $tags, array $receivers, int $target_type, array $profile): array
1217 $basecondition = ['rel' => [Contact::SHARING, Contact::FRIEND, Contact::FOLLOWER],
1218 'network' => Protocol::FEDERATED, 'archive' => false, 'pending' => false];
1220 if (!empty($profile['uri-id'])) {
1221 $condition = DBA::mergeConditions($basecondition, ["`uri-id` = ? AND `uid` != ?", $profile['uri-id'], 0]);
1222 $contacts = DBA::select('contact', ['uid', 'rel'], $condition);
1223 while ($contact = DBA::fetch($contacts)) {
1224 if (empty($receivers[$contact['uid']]) && self::isValidReceiverForActor($contact, $tags)) {
1225 $receivers[$contact['uid']] = ['uid' => $contact['uid'], 'type' => $target_type];
1228 DBA::close($contacts);
1230 // This part will only be called while post update 1426 wasn't finished
1231 $condition = DBA::mergeConditions($basecondition, ["`nurl` = ? AND `uid` != ?", Strings::normaliseLink($actor), 0]);
1232 $contacts = DBA::select('contact', ['uid', 'rel'], $condition);
1233 while ($contact = DBA::fetch($contacts)) {
1234 if (empty($receivers[$contact['uid']]) && self::isValidReceiverForActor($contact, $tags)) {
1235 $receivers[$contact['uid']] = ['uid' => $contact['uid'], 'type' => $target_type];
1238 DBA::close($contacts);
1240 // The queries are split because of performance issues
1241 $condition = DBA::mergeConditions($basecondition, ["`alias` IN (?, ?) AND `uid` != ?", Strings::normaliseLink($actor), $actor, 0]);
1242 $contacts = DBA::select('contact', ['uid', 'rel'], $condition);
1243 while ($contact = DBA::fetch($contacts)) {
1244 if (empty($receivers[$contact['uid']]) && self::isValidReceiverForActor($contact, $tags)) {
1245 $receivers[$contact['uid']] = ['uid' => $contact['uid'], 'type' => $target_type];
1248 DBA::close($contacts);
1254 * Tests if the contact is a valid receiver for this actor
1256 * @param array $contact
1257 * @param array $tags
1259 * @return bool with receivers (user id)
1260 * @throws \Exception
1262 private static function isValidReceiverForActor(array $contact, array $tags): bool
1264 // Are we following the contact? Then this is a valid receiver
1265 if (in_array($contact['rel'], [Contact::SHARING, Contact::FRIEND])) {
1269 // When the possible receiver isn't a community, then it is no valid receiver
1270 $owner = User::getOwnerDataById($contact['uid']);
1271 if (empty($owner) || ($owner['contact-type'] != Contact::TYPE_COMMUNITY)) {
1275 // Is the community account tagged?
1276 foreach ($tags as $tag) {
1277 if ($tag['type'] != 'Mention') {
1281 if (Strings::compareLink($tag['href'], $owner['url'])) {
1290 * Switches existing contacts to ActivityPub
1292 * @param integer $cid Contact ID
1293 * @param integer $uid User ID
1294 * @param string $url Profile URL
1296 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1297 * @throws \ImagickException
1299 public static function switchContact(int $cid, int $uid, string $url)
1301 if (DBA::exists('contact', ['id' => $cid, 'network' => Protocol::ACTIVITYPUB])) {
1302 Logger::info('Contact is already ActivityPub', ['id' => $cid, 'uid' => $uid, 'url' => $url]);
1306 if (Contact::updateFromProbe($cid)) {
1307 Logger::info('Update was successful', ['id' => $cid, 'uid' => $uid, 'url' => $url]);
1310 // Send a new follow request to be sure that the connection still exists
1311 if (($uid != 0) && DBA::exists('contact', ['id' => $cid, 'rel' => [Contact::SHARING, Contact::FRIEND], 'network' => Protocol::ACTIVITYPUB])) {
1312 Logger::info('Contact had been switched to ActivityPub. Sending a new follow request.', ['uid' => $uid, 'url' => $url]);
1313 ActivityPub\Transmitter::sendActivity('Follow', $url, $uid);
1318 * @TODO Fix documentation and type-hints
1323 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1324 * @throws \ImagickException
1326 private static function switchContacts($receivers, $actor)
1328 if (empty($actor)) {
1332 foreach ($receivers as $receiver) {
1333 $contact = DBA::selectFirst('contact', ['id'], ['uid' => $receiver['uid'], 'network' => Protocol::OSTATUS, 'nurl' => Strings::normaliseLink($actor)]);
1334 if (DBA::isResult($contact)) {
1335 self::switchContact($contact['id'], $receiver['uid'], $actor);
1338 $contact = DBA::selectFirst('contact', ['id'], ['uid' => $receiver['uid'], 'network' => Protocol::OSTATUS, 'alias' => [Strings::normaliseLink($actor), $actor]]);
1339 if (DBA::isResult($contact)) {
1340 self::switchContact($contact['id'], $receiver['uid'], $actor);
1346 * @TODO Fix documentation and type-hints
1348 * @param $object_data
1349 * @param array $activity
1353 private static function addActivityFields($object_data, array $activity)
1355 if (!empty($activity['published']) && empty($object_data['published'])) {
1356 $object_data['published'] = JsonLD::fetchElement($activity, 'as:published', '@value');
1359 if (!empty($activity['diaspora:guid']) && empty($object_data['diaspora:guid'])) {
1360 $object_data['diaspora:guid'] = JsonLD::fetchElement($activity, 'diaspora:guid', '@value');
1363 $object_data['service'] = JsonLD::fetchElement($activity, 'as:instrument', 'as:name', '@type', 'as:Service');
1364 $object_data['service'] = JsonLD::fetchElement($object_data, 'service', '@value');
1366 if (!empty($object_data['object_id'])) {
1367 // Some systems (e.g. GNU Social) don't reply to the "id" field but the "uri" field.
1368 $objectId = Item::getURIByLink($object_data['object_id']);
1369 if (!empty($objectId) && ($object_data['object_id'] != $objectId)) {
1370 Logger::notice('Fix wrong object-id', ['received' => $object_data['object_id'], 'correct' => $objectId]);
1371 $object_data['object_id'] = $objectId;
1375 return $object_data;
1379 * Fetches the object data from external resources if needed
1381 * @param string $object_id Object ID of the provided object
1382 * @param array $object The provided object array
1383 * @param boolean $trust_source Do we trust the provided object?
1384 * @param integer $uid User ID for the signature that we use to fetch data
1386 * @return array|false with trusted and valid object data
1387 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1388 * @throws \ImagickException
1390 private static function fetchObject(string $object_id, array $object = [], bool $trust_source = false, int $uid = 0)
1392 // By fetching the type we check if the object is complete.
1393 $type = JsonLD::fetchElement($object, '@type');
1395 if (!$trust_source || empty($type)) {
1396 $data = Processor::fetchCachedActivity($object_id, $uid);
1397 if (!empty($data)) {
1398 $object = JsonLD::compact($data);
1399 Logger::info('Fetched content for ' . $object_id);
1401 Logger::info('Empty content for ' . $object_id . ', check if content is available locally.');
1403 $item = Post::selectFirst(Item::DELIVER_FIELDLIST, ['uri' => $object_id]);
1404 if (!DBA::isResult($item)) {
1405 Logger::info('Object with url ' . $object_id . ' was not found locally.');
1408 Logger::info('Using already stored item for url ' . $object_id);
1409 $data = ActivityPub\Transmitter::createNote($item);
1410 $object = JsonLD::compact($data);
1413 $id = JsonLD::fetchElement($object, '@id');
1415 Logger::info('Empty id');
1419 if ($id != $object_id) {
1420 Logger::info('Fetched id differs from provided id', ['provided' => $object_id, 'fetched' => $id]);
1424 Logger::info('Using original object for url ' . $object_id);
1427 $type = JsonLD::fetchElement($object, '@type');
1429 Logger::info('Empty type');
1433 // Lemmy is resharing "create" activities instead of content
1434 // We fetch the content from the activity.
1435 if (in_array($type, ['as:Create'])) {
1436 $object = $object['as:object'];
1437 $type = JsonLD::fetchElement($object, '@type');
1439 Logger::info('Empty type');
1442 $object_data = self::processObject($object);
1445 // We currently don't handle 'pt:CacheFile', but with this step we avoid logging
1446 if (in_array($type, self::CONTENT_TYPES) || ($type == 'pt:CacheFile')) {
1447 $object_data = self::processObject($object);
1449 if (!empty($data)) {
1450 $object_data['raw-object'] = json_encode($data);
1452 return $object_data;
1455 Logger::info('Unhandled object type: ' . $type);
1460 * Converts the language element (Used by Peertube)
1462 * @param array $languages
1463 * @return array Languages
1465 public static function processLanguages(array $languages): array
1467 if (empty($languages)) {
1471 $language_list = [];
1473 foreach ($languages as $language) {
1474 if (!empty($language['_:identifier']) && !empty($language['as:name'])) {
1475 $language_list[$language['_:identifier']] = $language['as:name'];
1478 return $language_list;
1482 * Convert tags from JSON-LD format into a simplified format
1484 * @param array $tags Tags in JSON-LD format
1486 * @return array with tags in a simplified format
1488 public static function processTags(array $tags): array
1492 foreach ($tags as $tag) {
1497 $element = ['type' => str_replace('as:', '', JsonLD::fetchElement($tag, '@type') ?? ''),
1498 'href' => JsonLD::fetchElement($tag, 'as:href', '@id'),
1499 'name' => JsonLD::fetchElement($tag, 'as:name', '@value')];
1501 if (empty($element['type'])) {
1505 if (empty($element['href'])) {
1506 $element['href'] = $element['name'];
1509 $taglist[] = $element;
1515 * Convert emojis from JSON-LD format into a simplified format
1517 * @param array $emojis
1518 * @return array with emojis in a simplified format
1520 private static function processEmojis(array $emojis): array
1524 foreach ($emojis as $emoji) {
1525 if (empty($emoji) || (JsonLD::fetchElement($emoji, '@type') != 'toot:Emoji') || empty($emoji['as:icon'])) {
1529 $url = JsonLD::fetchElement($emoji['as:icon'], 'as:url', '@id');
1530 $element = ['name' => JsonLD::fetchElement($emoji, 'as:name', '@value'),
1533 $emojilist[] = $element;
1540 * Convert attachments from JSON-LD format into a simplified format
1542 * @param array $attachments Attachments in JSON-LD format
1544 * @return array Attachments in a simplified format
1546 private static function processAttachments(array $attachments): array
1550 // Removes empty values
1551 $attachments = array_filter($attachments);
1553 foreach ($attachments as $attachment) {
1554 switch (JsonLD::fetchElement($attachment, '@type')) {
1559 $urls = JsonLD::fetchElementArray($attachment, 'as:url');
1560 foreach ($urls as $url) {
1561 // Single scalar URL case
1562 if (is_string($url)) {
1567 $href = JsonLD::fetchElement($url, 'as:href', '@id');
1568 $mediaType = JsonLD::fetchElement($url, 'as:mediaType', '@value');
1569 if (Strings::startsWith($mediaType, 'image')) {
1578 'title' => JsonLD::fetchElement($attachment, 'as:name', '@value'),
1579 'desc' => JsonLD::fetchElement($attachment, 'as:summary', '@value'),
1581 'image' => $pageImage,
1585 $mediaType = JsonLD::fetchElement($attachment, 'as:mediaType', '@value');
1586 $imageFullUrl = JsonLD::fetchElement($attachment, 'as:url', '@id');
1587 $imagePreviewUrl = null;
1589 if (!$imageFullUrl && ($urls = JsonLD::fetchElementArray($attachment, 'as:url'))) {
1590 $imageVariants = [];
1591 $previewVariants = [];
1592 foreach ($urls as $url) {
1593 // Scalar URL, no discrimination possible
1594 if (is_string($url)) {
1595 $imageFullUrl = $url;
1599 // Not sure what to do with a different Link media type than the base Image, we skip
1600 if ($mediaType != JsonLD::fetchElement($url, 'as:mediaType', '@value')) {
1604 $href = JsonLD::fetchElement($url, 'as:href', '@id');
1606 // Default URL choice if no discriminating width is provided
1607 $imageFullUrl = $href ?? $imageFullUrl;
1609 $width = intval(JsonLD::fetchElement($url, 'as:width', '@value') ?? 1);
1611 if ($href && $width) {
1612 $imageVariants[$width] = $href;
1613 // 632 is the ideal width for full screen frio posts, we compute the absolute distance to it
1614 $previewVariants[abs(632 - $width)] = $href;
1618 if ($imageVariants) {
1619 // Taking the maximum size image
1620 ksort($imageVariants);
1621 $imageFullUrl = array_pop($imageVariants);
1623 // Taking the minimum number distance to the target distance
1624 ksort($previewVariants);
1625 $imagePreviewUrl = array_shift($previewVariants);
1628 unset($imageVariants);
1629 unset($previewVariants);
1633 'type' => str_replace('as:', '', JsonLD::fetchElement($attachment, '@type')),
1634 'mediaType' => $mediaType,
1635 'name' => JsonLD::fetchElement($attachment, 'as:name', '@value'),
1636 'url' => $imageFullUrl,
1637 'image' => $imagePreviewUrl !== $imageFullUrl ? $imagePreviewUrl : null,
1642 'type' => str_replace('as:', '', JsonLD::fetchElement($attachment, '@type')),
1643 'mediaType' => JsonLD::fetchElement($attachment, 'as:mediaType', '@value'),
1644 'name' => JsonLD::fetchElement($attachment, 'as:name', '@value'),
1645 'url' => JsonLD::fetchElement($attachment, 'as:url', '@id') ?? JsonLD::fetchElement($attachment, 'as:href', '@id'),
1646 'height' => JsonLD::fetchElement($attachment, 'as:height', '@value'),
1647 'width' => JsonLD::fetchElement($attachment, 'as:width', '@value'),
1648 'image' => JsonLD::fetchElement($attachment, 'as:image', '@id')
1657 * Convert questions from JSON-LD format into a simplified format
1659 * @param array $object
1661 * @return array Questions in a simplified format
1663 private static function processQuestion(array $object): array
1667 if (!empty($object['as:oneOf'])) {
1668 $question['multiple'] = false;
1669 $options = JsonLD::fetchElementArray($object, 'as:oneOf') ?? [];
1670 } elseif (!empty($object['as:anyOf'])) {
1671 $question['multiple'] = true;
1672 $options = JsonLD::fetchElementArray($object, 'as:anyOf') ?? [];
1677 $closed = JsonLD::fetchElement($object, 'as:closed', '@value');
1678 if (!empty($closed)) {
1679 $question['end-time'] = $closed;
1681 $question['end-time'] = JsonLD::fetchElement($object, 'as:endTime', '@value');
1684 $question['voters'] = (int)JsonLD::fetchElement($object, 'toot:votersCount', '@value');
1685 $question['options'] = [];
1689 foreach ($options as $option) {
1690 if (JsonLD::fetchElement($option, '@type') != 'as:Note') {
1694 $name = JsonLD::fetchElement($option, 'as:name', '@value');
1696 if (empty($option['as:replies'])) {
1700 $replies = JsonLD::fetchElement($option['as:replies'], 'as:totalItems', '@value');
1702 $question['options'][] = ['name' => $name, 'replies' => $replies];
1704 $voters += (int)$replies;
1707 // For single choice question we can count the number of voters if not provided (like with Misskey)
1708 if (empty($question['voters']) && !$question['multiple']) {
1709 $question['voters'] = $voters;
1716 * Fetch the original source or content with the "language" Markdown or HTML
1718 * @param array $object
1719 * @param array $object_data
1721 * @return array Object data (?)
1722 * @throws \Exception
1724 private static function getSource(array $object, array $object_data): array
1726 $object_data['source'] = JsonLD::fetchElement($object, 'as:source', 'as:content', 'as:mediaType', 'text/bbcode');
1727 $object_data['source'] = JsonLD::fetchElement($object_data, 'source', '@value');
1728 if (!empty($object_data['source'])) {
1729 return $object_data;
1732 $object_data['source'] = JsonLD::fetchElement($object, 'as:source', 'as:content', 'as:mediaType', 'text/markdown');
1733 $object_data['source'] = JsonLD::fetchElement($object_data, 'source', '@value');
1734 if (!empty($object_data['source'])) {
1735 $object_data['source'] = Markdown::toBBCode($object_data['source']);
1736 return $object_data;
1739 $object_data['source'] = JsonLD::fetchElement($object, 'as:source', 'as:content', 'as:mediaType', 'text/html');
1740 $object_data['source'] = JsonLD::fetchElement($object_data, 'source', '@value');
1741 if (!empty($object_data['source'])) {
1742 $object_data['source'] = HTML::toBBCode($object_data['source']);
1743 return $object_data;
1746 return $object_data;
1750 * Extracts a potential alternate URL from a list of additional URL elements
1752 * @param array $urls
1755 private static function extractAlternateUrl(array $urls): string
1758 foreach ($urls as $key => $url) {
1759 // Not a list but a single URL element
1760 if (!is_numeric($key)) {
1764 if (empty($url['@type']) || ($url['@type'] != 'as:Link')) {
1768 $href = JsonLD::fetchElement($url, 'as:href', '@id');
1773 $mediatype = JsonLD::fetchElement($url, 'as:mediaType');
1774 if (empty($mediatype)) {
1778 if ($mediatype == 'text/html') {
1779 $alternateUrl = $href;
1783 return $alternateUrl;
1787 * Check if the "as:url" element is an array with multiple links
1788 * This is the case with audio and video posts.
1789 * Then the links are added as attachments
1791 * @param array $urls The object URL list
1792 * @return array an array of attachments
1794 private static function processAttachmentUrls(array $urls): array
1797 foreach ($urls as $key => $url) {
1798 // Not a list but a single URL element
1799 if (!is_numeric($key)) {
1803 if (empty($url['@type']) || ($url['@type'] != 'as:Link')) {
1807 $href = JsonLD::fetchElement($url, 'as:href', '@id');
1812 $mediatype = JsonLD::fetchElement($url, 'as:mediaType');
1813 if (empty($mediatype)) {
1817 $filetype = strtolower(substr($mediatype, 0, strpos($mediatype, '/')));
1819 if ($filetype == 'audio') {
1820 $attachments[] = ['type' => $filetype, 'mediaType' => $mediatype, 'url' => $href, 'height' => null, 'size' => null, 'name' => ''];
1821 } elseif ($filetype == 'video') {
1822 $height = (int)JsonLD::fetchElement($url, 'as:height', '@value');
1823 // PeerTube audio-only track
1824 if ($height === 0) {
1828 $size = (int)JsonLD::fetchElement($url, 'pt:size', '@value');
1829 $attachments[] = ['type' => $filetype, 'mediaType' => $mediatype, 'url' => $href, 'height' => $height, 'size' => $size, 'name' => ''];
1830 } elseif (in_array($mediatype, ['application/x-bittorrent', 'application/x-bittorrent;x-scheme-handler/magnet'])) {
1831 $height = (int)JsonLD::fetchElement($url, 'as:height', '@value');
1833 // For Torrent links we always store the highest resolution
1834 if (!empty($attachments[$mediatype]['height']) && ($height < $attachments[$mediatype]['height'])) {
1838 $attachments[$mediatype] = ['type' => $mediatype, 'mediaType' => $mediatype, 'url' => $href, 'height' => $height, 'size' => null, 'name' => ''];
1839 } elseif ($mediatype == 'application/x-mpegURL') {
1840 // PeerTube exception, actual video link is in the tags of this URL element
1841 $attachments = array_merge($attachments, self::processAttachmentUrls($url['as:tag']));
1845 return array_values($attachments);
1849 * Fetches data from the object part of an activity
1851 * @param array $object
1853 * @return array|bool Object data or FALSE if $object does not contain @id element
1854 * @throws \Exception
1856 private static function processObject(array $object)
1858 if (!JsonLD::fetchElement($object, '@id')) {
1862 $object_data = self::getObjectDataFromActivity($object);
1864 $receiverdata = self::getReceivers($object, $object_data['actor'] ?? '', $object_data['tags'], true, false);
1865 $receivers = $reception_types = [];
1866 foreach ($receiverdata as $key => $data) {
1867 $receivers[$key] = $data['uid'];
1868 $reception_types[$data['uid']] = $data['type'] ?? 0;
1871 $object_data['receiver_urls'] = self::getReceiverURL($object);
1872 $object_data['receiver'] = $receivers;
1873 $object_data['reception_type'] = $reception_types;
1875 $object_data['unlisted'] = in_array(-1, $object_data['receiver']);
1876 unset($object_data['receiver'][-1]);
1877 unset($object_data['reception_type'][-1]);
1879 return $object_data;
1883 * Create an object data array from a given activity
1885 * @param array $object
1887 * @return array Object data
1889 public static function getObjectDataFromActivity(array $object): array
1892 $object_data['object_type'] = JsonLD::fetchElement($object, '@type');
1893 $object_data['id'] = JsonLD::fetchElement($object, '@id');
1894 $object_data['reply-to-id'] = JsonLD::fetchElement($object, 'as:inReplyTo', '@id');
1896 // An empty "id" field is translated to "./" by the compactor, so we have to check for this content
1897 if (empty($object_data['reply-to-id']) || ($object_data['reply-to-id'] == './')) {
1898 $object_data['reply-to-id'] = $object_data['id'];
1900 // On activities the "reply to" is the id of the object it refers to
1901 if (in_array($object_data['object_type'], array_merge(self::ACTIVITY_TYPES, ['as:Announce']))) {
1902 $object_id = JsonLD::fetchElement($object, 'as:object', '@id');
1903 if (!empty($object_id)) {
1904 $object_data['reply-to-id'] = $object_id;
1908 // Some systems (e.g. GNU Social) don't reply to the "id" field but the "uri" field.
1909 $replyToId = Item::getURIByLink($object_data['reply-to-id']);
1910 if (!empty($replyToId) && ($object_data['reply-to-id'] != $replyToId)) {
1911 Logger::notice('Fix wrong reply-to', ['received' => $object_data['reply-to-id'], 'correct' => $replyToId]);
1912 $object_data['reply-to-id'] = $replyToId;
1916 $object_data['published'] = JsonLD::fetchElement($object, 'as:published', '@value');
1917 $object_data['updated'] = JsonLD::fetchElement($object, 'as:updated', '@value');
1919 if (empty($object_data['updated'])) {
1920 $object_data['updated'] = $object_data['published'];
1923 if (empty($object_data['published']) && !empty($object_data['updated'])) {
1924 $object_data['published'] = $object_data['updated'];
1927 $actor = JsonLD::fetchElement($object, 'as:attributedTo', '@id');
1928 if (empty($actor)) {
1929 $actor = JsonLD::fetchElement($object, 'as:actor', '@id');
1932 $location = JsonLD::fetchElement($object, 'as:location', 'as:name', '@type', 'as:Place');
1933 $location = JsonLD::fetchElement($location, 'location', '@value');
1935 // Some AP software allow formatted text in post location, so we run all the text converters we have to boil
1936 // down to HTML and then finally format to plaintext.
1937 $location = Markdown::convert($location);
1938 $location = BBCode::toPlaintext($location);
1941 $object_data['sc:identifier'] = JsonLD::fetchElement($object, 'sc:identifier', '@value');
1942 $object_data['diaspora:guid'] = JsonLD::fetchElement($object, 'diaspora:guid', '@value');
1943 $object_data['diaspora:comment'] = JsonLD::fetchElement($object, 'diaspora:comment', '@value');
1944 $object_data['diaspora:like'] = JsonLD::fetchElement($object, 'diaspora:like', '@value');
1945 $object_data['actor'] = $object_data['author'] = $actor;
1946 $element = JsonLD::fetchElement($object, 'as:context', '@id');
1947 $object_data['context'] = $element != './' ? $element : null;
1948 $element = JsonLD::fetchElement($object, 'ostatus:conversation', '@id');
1949 $object_data['conversation'] = $element != './' ? $element : null;
1950 $object_data['sensitive'] = JsonLD::fetchElement($object, 'as:sensitive');
1951 $object_data['name'] = JsonLD::fetchElement($object, 'as:name', '@value');
1952 $object_data['summary'] = JsonLD::fetchElement($object, 'as:summary', '@value');
1953 $object_data['content'] = JsonLD::fetchElement($object, 'as:content', '@value');
1954 $object_data['mediatype'] = JsonLD::fetchElement($object, 'as:mediaType', '@value');
1955 $object_data = self::getSource($object, $object_data);
1956 $object_data['start-time'] = JsonLD::fetchElement($object, 'as:startTime', '@value');
1957 $object_data['end-time'] = JsonLD::fetchElement($object, 'as:endTime', '@value');
1958 $object_data['location'] = $location;
1959 $object_data['latitude'] = JsonLD::fetchElement($object, 'as:location', 'as:latitude', '@type', 'as:Place');
1960 $object_data['latitude'] = JsonLD::fetchElement($object_data, 'latitude', '@value');
1961 $object_data['longitude'] = JsonLD::fetchElement($object, 'as:location', 'as:longitude', '@type', 'as:Place');
1962 $object_data['longitude'] = JsonLD::fetchElement($object_data, 'longitude', '@value');
1963 $object_data['attachments'] = self::processAttachments(JsonLD::fetchElementArray($object, 'as:attachment') ?? []);
1964 $object_data['tags'] = self::processTags(JsonLD::fetchElementArray($object, 'as:tag') ?? []);
1965 $object_data['emojis'] = self::processEmojis(JsonLD::fetchElementArray($object, 'as:tag', null, '@type', 'toot:Emoji') ?? []);
1966 $object_data['languages'] = self::processLanguages(JsonLD::fetchElementArray($object, 'sc:inLanguage') ?? []);
1967 $object_data['generator'] = JsonLD::fetchElement($object, 'as:generator', 'as:name', '@type', 'as:Application');
1968 $object_data['generator'] = JsonLD::fetchElement($object_data, 'generator', '@value');
1969 $object_data['alternate-url'] = JsonLD::fetchElement($object, 'as:url', '@id');
1971 // Special treatment for Hubzilla links
1972 if (is_array($object_data['alternate-url'])) {
1973 $object_data['alternate-url'] = JsonLD::fetchElement($object_data['alternate-url'], 'as:href', '@id');
1975 if (!is_string($object_data['alternate-url'])) {
1976 $object_data['alternate-url'] = JsonLD::fetchElement($object['as:url'], 'as:href', '@id');
1980 if (!empty($object_data['alternate-url']) && !Network::isValidHttpUrl($object_data['alternate-url'])) {
1981 $object_data['alternate-url'] = null;
1984 if (in_array($object_data['object_type'], ['as:Audio', 'as:Video'])) {
1985 $object_data['alternate-url'] = self::extractAlternateUrl($object['as:url'] ?? []) ?: $object_data['alternate-url'];
1986 $object_data['attachments'] = array_merge($object_data['attachments'], self::processAttachmentUrls($object['as:url'] ?? []));
1989 // Support for quoted posts (Pleroma, Fedibird and Misskey)
1990 $object_data['quote-url'] = JsonLD::fetchElement($object, 'as:quoteUrl', '@value');
1991 if (empty($object_data['quote-url'])) {
1992 $object_data['quote-url'] = JsonLD::fetchElement($object, 'fedibird:quoteUri', '@value');
1994 if (empty($object_data['quote-url'])) {
1995 $object_data['quote-url'] = JsonLD::fetchElement($object, 'misskey:_misskey_quote', '@value');
1998 // Misskey adds some data to the standard "content" value for quoted posts for backwards compatibility.
1999 // Their own "_misskey_content" value does then contain the content without this extra data.
2000 if (!empty($object_data['quote-url'])) {
2001 $misskey_content = JsonLD::fetchElement($object, 'misskey:_misskey_content', '@value');
2002 if (!empty($misskey_content)) {
2003 $object_data['content'] = $misskey_content;
2007 // For page types we expect that the alternate url posts to some page.
2008 // So we add this to the attachments if it differs from the id.
2009 // Currently only Lemmy is using the page type.
2010 if (($object_data['object_type'] == 'as:Page') && !empty($object_data['alternate-url']) && !Strings::compareLink($object_data['alternate-url'], $object_data['id'])) {
2011 $object_data['attachments'][] = ['url' => $object_data['alternate-url']];
2012 $object_data['alternate-url'] = null;
2015 if ($object_data['object_type'] == 'as:Question') {
2016 $object_data['question'] = self::processQuestion($object);
2019 return $object_data;
2023 * Add an object id to the list of arrived activities
2029 private static function addArrivedId(string $id)
2031 DBA::delete('arrived-activity', ["`received` < ?", DateTimeFormat::utc('now - 5 minutes')]);
2032 DBA::insert('arrived-activity', ['object-id' => $id, 'received' => DateTimeFormat::utcNow()], Database::INSERT_IGNORE);
2036 * Checks if the given object already arrived before
2042 private static function hasArrived(string $id): bool
2044 return DBA::exists('arrived-activity', ['object-id' => $id]);