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;
77 const COMPLETION_NONE = 0;
78 const COMPLETION_ANNOUCE = 1;
79 const COMPLETION_RELAY = 2;
80 const COMPLETION_MANUAL = 3;
81 const COMPLETION_AUTO = 4;
84 * Checks incoming message from the inbox
86 * @param string $body Body string
87 * @param array $header Header lines
88 * @param integer $uid User ID
92 public static function processInbox(string $body, array $header, int $uid)
94 $activity = json_decode($body, true);
95 if (empty($activity)) {
96 Logger::warning('Invalid body.');
100 $ldactivity = JsonLD::compact($activity);
102 $actor = JsonLD::fetchElement($ldactivity, 'as:actor', '@id') ?? '';
104 $apcontact = APContact::getByURL($actor);
106 if (empty($apcontact)) {
107 Logger::notice('Unable to retrieve AP contact for actor - message is discarded', ['actor' => $actor]);
109 } elseif (APContact::isRelay($apcontact)) {
110 self::processRelayPost($ldactivity, $actor);
113 APContact::unmarkForArchival($apcontact);
116 $sig_contact = HTTPSignature::getKeyIdContact($header);
117 if (APContact::isRelay($sig_contact)) {
118 Logger::info('Message from a relay', ['url' => $sig_contact['url']]);
119 self::processRelayPost($ldactivity, $sig_contact['url']);
123 $http_signer = HTTPSignature::getSigner($body, $header);
124 if ($http_signer === false) {
125 Logger::notice('Invalid HTTP signature, message will not be trusted.', ['uid' => $uid, 'actor' => $actor, 'header' => $header, 'body' => $body]);
127 } elseif (empty($http_signer)) {
128 Logger::info('Signer is a tombstone. The message will be discarded, the signer account is deleted.');
131 Logger::info('Valid HTTP signature', ['signer' => $http_signer]);
132 $signer = [$http_signer];
135 Logger::info('Message for user ' . $uid . ' is from actor ' . $actor);
137 if ($http_signer === false) {
138 $trust_source = false;
139 } elseif (LDSignature::isSigned($activity)) {
140 $ld_signer = LDSignature::getSigner($activity);
141 if (empty($ld_signer)) {
142 Logger::info('Invalid JSON-LD signature from ' . $actor);
143 } elseif ($ld_signer != $http_signer) {
144 $signer[] = $ld_signer;
146 if (!empty($ld_signer && ($actor == $http_signer))) {
147 Logger::info('The HTTP and the JSON-LD signature belong to ' . $ld_signer);
148 $trust_source = true;
149 } elseif (!empty($ld_signer)) {
150 Logger::info('JSON-LD signature is signed by ' . $ld_signer);
151 $trust_source = true;
152 } elseif ($actor == $http_signer) {
153 Logger::info('Bad JSON-LD signature, but HTTP signer fits the actor.');
154 $trust_source = true;
156 Logger::info('Invalid JSON-LD signature and the HTTP signer is different.');
157 $trust_source = false;
159 } elseif ($actor == $http_signer) {
160 Logger::info('Trusting post without JSON-LD signature, The actor fits the HTTP signer.');
161 $trust_source = true;
163 Logger::info('No JSON-LD signature, different actor.');
164 $trust_source = false;
167 self::processActivity($ldactivity, $body, $uid, $trust_source, true, $signer, $http_signer);
171 * Process incoming posts from relays
173 * @param array $activity
174 * @param string $actor
177 private static function processRelayPost(array $activity, string $actor)
179 $type = JsonLD::fetchElement($activity, '@type');
181 Logger::notice('Empty type', ['activity' => $activity, 'actor' => $actor]);
185 $object_type = JsonLD::fetchElement($activity, 'as:object', '@type') ?? '';
187 $object_id = JsonLD::fetchElement($activity, 'as:object', '@id');
188 if (empty($object_id)) {
189 Logger::notice('No object id found', ['type' => $type, 'object_type' => $object_type, 'actor' => $actor, 'activity' => $activity]);
193 $handle = ($type == 'as:Announce');
195 if (!$handle && in_array($type, ['as:Create', 'as:Update'])) {
196 $handle = in_array($object_type, self::CONTENT_TYPES);
200 $trust_source = false;
201 $object_data = self::prepareObjectData($activity, 0, false, $trust_source);
203 if (!$trust_source) {
204 Logger::notice('Activity trust could not be achieved.', ['type' => $type, 'object_type' => $object_type, 'object_id' => $object_id, 'actor' => $actor, 'activity' => $activity]);
208 if (empty($object_data)) {
209 Logger::notice('No object data found', ['type' => $type, 'object_type' => $object_type, 'object_id' => $object_id, 'actor' => $actor, 'activity' => $activity]);
213 if (self::routeActivities($object_data, $type, true)) {
214 Logger::debug('Handled activity', ['type' => $type, 'object_type' => $object_type, 'object_id' => $object_id, 'actor' => $actor]);
216 Logger::info('Unhandled activity', ['type' => $type, 'object_type' => $object_type, 'object_id' => $object_id, 'actor' => $actor, 'activity' => $activity]);
221 $contact = Contact::getByURL($actor);
222 if (empty($contact)) {
223 Logger::info('Relay contact not found', ['actor' => $actor]);
227 if (!in_array($contact['rel'], [Contact::SHARING, Contact::FRIEND])) {
228 Logger::notice('Relay is no sharer', ['actor' => $actor]);
232 Logger::debug('Got relayed message id', ['id' => $object_id, 'actor' => $actor]);
234 $item_id = Item::searchByLink($object_id);
236 Logger::info('Relayed message already exists', ['id' => $object_id, 'item' => $item_id, 'actor' => $actor]);
240 $id = Processor::fetchMissingActivity($object_id, [], $actor, self::COMPLETION_RELAY);
242 Logger::notice('Relayed message had not been fetched', ['id' => $object_id, 'actor' => $actor]);
248 * Fetches the object type for a given object id
250 * @param array $activity
251 * @param string $object_id Object ID of the the provided object
252 * @param integer $uid User ID
254 * @return string with object type or NULL
255 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
256 * @throws \ImagickException
258 private static function fetchObjectType(array $activity, string $object_id, int $uid = 0)
260 if (!empty($activity['as:object'])) {
261 $object_type = JsonLD::fetchElement($activity['as:object'], '@type');
262 if (!empty($object_type)) {
267 if (Post::exists(['uri' => $object_id, 'gravity' => [Item::GRAVITY_PARENT, Item::GRAVITY_COMMENT]])) {
268 // We just assume "note" since it doesn't make a difference for the further processing
272 $profile = APContact::getByURL($object_id);
273 if (!empty($profile['type'])) {
274 APContact::unmarkForArchival($profile);
275 return 'as:' . $profile['type'];
278 $data = Processor::fetchCachedActivity($object_id, $uid);
280 $object = JsonLD::compact($data);
281 $type = JsonLD::fetchElement($object, '@type');
291 * Prepare the object array
293 * @param array $activity Array with activity data
294 * @param integer $uid User ID
295 * @param boolean $push Message had been pushed to our system
296 * @param boolean $trust_source Do we trust the source?
298 * @return array with object data
299 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
300 * @throws \ImagickException
302 public static function prepareObjectData(array $activity, int $uid, bool $push, bool &$trust_source): array
304 $id = JsonLD::fetchElement($activity, '@id');
305 $type = JsonLD::fetchElement($activity, '@type');
306 $object_id = JsonLD::fetchElement($activity, 'as:object', '@id');
308 if (!empty($object_id) && in_array($type, ['as:Create', 'as:Update'])) {
309 $fetch_id = $object_id;
314 if (!empty($activity['as:object'])) {
315 $object_type = JsonLD::fetchElement($activity['as:object'], '@type');
320 if (!empty($id) && !$trust_source) {
321 $fetch_uid = $uid ?: self::getBestUserForActivity($activity);
323 $fetched_activity = Processor::fetchCachedActivity($fetch_id, $fetch_uid);
324 if (!empty($fetched_activity)) {
326 $object = JsonLD::compact($fetched_activity);
328 $fetched_id = JsonLD::fetchElement($object, '@id');
329 $fetched_type = JsonLD::fetchElement($object, '@type');
331 if (($fetched_id == $id) && !empty($fetched_type) && ($fetched_type == $type)) {
332 Logger::info('Activity had been fetched successfully', ['id' => $id]);
333 $trust_source = true;
335 } elseif (($fetched_id == $object_id) && !empty($fetched_type) && ($fetched_type == $object_type)) {
336 Logger::info('Fetched data is the object instead of the activity', ['id' => $id]);
337 $trust_source = true;
338 unset($object['@context']);
339 $activity['as:object'] = $object;
341 Logger::info('Activity id is not equal', ['id' => $id, 'fetched' => $fetched_id]);
344 Logger::info('Activity could not been fetched', ['id' => $id]);
348 $actor = JsonLD::fetchElement($activity, 'as:actor', '@id');
350 Logger::info('Empty actor', ['activity' => $activity]);
354 $type = JsonLD::fetchElement($activity, '@type');
356 // Fetch all receivers from to, cc, bto and bcc
357 $receiverdata = self::getReceivers($activity, $actor, [], false, $push || $fetched);
358 $receivers = $reception_types = [];
359 foreach ($receiverdata as $key => $data) {
360 $receivers[$key] = $data['uid'];
361 $reception_types[$data['uid']] = $data['type'] ?? self::TARGET_UNKNOWN;
364 $urls = self::getReceiverURL($activity);
366 // When it is a delivery to a personal inbox we add that user to the receivers
368 $additional = [$uid => $uid];
369 $receivers = array_replace($receivers, $additional);
370 if (empty($activity['thread-completion']) && (empty($reception_types[$uid]) || in_array($reception_types[$uid], [self::TARGET_UNKNOWN, self::TARGET_FOLLOWER, self::TARGET_ANSWER, self::TARGET_GLOBAL]))) {
371 $reception_types[$uid] = self::TARGET_BCC;
372 $owner = User::getOwnerDataById($uid);
373 if (!empty($owner['url'])) {
374 $urls['as:bcc'][] = $owner['url'];
379 // We possibly need some user to fetch private content,
380 // so we fetch one out of the receivers if no uid is provided.
381 $fetch_uid = $uid ?: self::getBestUserForActivity($activity);
383 $object_id = JsonLD::fetchElement($activity, 'as:object', '@id');
384 if (empty($object_id)) {
385 Logger::info('No object found');
389 if (!is_string($object_id)) {
390 Logger::info('Invalid object id', ['object' => $object_id]);
394 $object_type = self::fetchObjectType($activity, $object_id, $fetch_uid);
396 // Fetch the activity on Lemmy "Announce" messages (announces of activities)
397 if (($type == 'as:Announce') && in_array($object_type, array_merge(self::ACTIVITY_TYPES, ['as:Delete', 'as:Undo', 'as:Update']))) {
398 Logger::debug('Fetch announced activity', ['object' => $object_id]);
399 $data = Processor::fetchCachedActivity($object_id, $fetch_uid);
401 $type = $object_type;
402 $activity = JsonLD::compact($data);
404 // Some variables need to be refetched since the activity changed
405 $actor = JsonLD::fetchElement($activity, 'as:actor', '@id');
406 $object_id = JsonLD::fetchElement($activity, 'as:object', '@id');
407 $object_type = self::fetchObjectType($activity, $object_id, $fetch_uid);
411 // Any activities on account types must not be altered
412 if (in_array($type, ['as:Flag'])) {
414 $object_data['id'] = JsonLD::fetchElement($activity, '@id');
415 $object_data['object_id'] = JsonLD::fetchElement($activity, 'as:object', '@id');
416 $object_data['object_ids'] = JsonLD::fetchElementArray($activity, 'as:object', '@id');
417 $object_data['content'] = JsonLD::fetchElement($activity, 'as:content', '@type');
418 $object_data['push'] = $push;
419 } elseif (in_array($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 $object_data['push'] = $push;
427 if (!$trust_source && ($type == 'as:Delete')) {
428 $apcontact = APContact::getByURL($object_data['object_id'], true);
429 $trust_source = empty($apcontact) || ($apcontact['type'] == 'Tombstone') || $apcontact['suspended'];
431 } elseif (in_array($type, ['as:Create', 'as:Update', 'as:Announce', 'as:Invite']) || strpos($type, '#emojiReaction')) {
432 // Fetch the content only on activities where this matters
433 // We can receive "#emojiReaction" when fetching content from Hubzilla systems
434 // Always fetch on "Announce"
435 $object_data = self::fetchObject($object_id, $activity['as:object'], $trust_source && ($type != 'as:Announce'), $fetch_uid);
436 if (empty($object_data)) {
437 Logger::info("Object data couldn't be processed");
441 $object_data['object_id'] = $object_id;
443 if ($type == 'as:Announce') {
444 $object_data['push'] = false;
446 $object_data['push'] = $push;
449 // Test if it is an answer to a mail
450 if (DBA::exists('mail', ['uri' => $object_data['reply-to-id']])) {
451 $object_data['directmessage'] = true;
453 $object_data['directmessage'] = JsonLD::fetchElement($activity, 'litepub:directMessage');
455 } elseif (in_array($type, array_merge(self::ACTIVITY_TYPES, ['as:Follow'])) && in_array($object_type, self::CONTENT_TYPES)) {
456 // Create a mostly empty array out of the activity data (instead of the object).
457 // This way we later don't have to check for the existence of each individual array element.
458 $object_data = self::processObject($activity);
459 $object_data['name'] = $type;
460 $object_data['author'] = JsonLD::fetchElement($activity, 'as:actor', '@id');
461 $object_data['object_id'] = $object_id;
462 $object_data['object_type'] = ''; // Since we don't fetch the object, we don't know the type
463 $object_data['push'] = $push;
464 } elseif (in_array($type, ['as:Add', 'as:Remove', 'as:Move'])) {
466 $object_data['id'] = JsonLD::fetchElement($activity, '@id');
467 $object_data['target_id'] = JsonLD::fetchElement($activity, 'as:target', '@id');
468 $object_data['object_id'] = JsonLD::fetchElement($activity, 'as:object', '@id');
469 $object_data['object_type'] = JsonLD::fetchElement($activity['as:object'], '@type');
470 $object_data['object_content'] = JsonLD::fetchElement($activity['as:object'], 'as:content', '@type');
471 $object_data['push'] = $push;
474 $object_data['id'] = JsonLD::fetchElement($activity, '@id');
475 $object_data['object_id'] = JsonLD::fetchElement($activity, 'as:object', '@id');
476 $object_data['object_actor'] = JsonLD::fetchElement($activity['as:object'], 'as:actor', '@id');
477 $object_data['object_object'] = JsonLD::fetchElement($activity['as:object'], 'as:object');
478 $object_data['object_type'] = JsonLD::fetchElement($activity['as:object'], '@type');
479 $object_data['push'] = $push;
481 // An Undo is done on the object of an object, so we need that type as well
482 if (($type == 'as:Undo') && !empty($object_data['object_object'])) {
483 $object_data['object_object_type'] = self::fetchObjectType([], $object_data['object_object'], $fetch_uid);
486 if (!$trust_source && ($type == 'as:Delete') && in_array($object_data['object_type'], array_merge(['as:Tombstone', ''], self::CONTENT_TYPES))) {
487 $trust_source = Processor::isActivityGone($object_data['object_id']);
488 if (!$trust_source) {
489 $trust_source = !empty(APContact::getByURL($object_data['object_id'], false));
494 $object_data = self::addActivityFields($object_data, $activity);
496 if (empty($object_data['object_type'])) {
497 $object_data['object_type'] = $object_type;
500 foreach (['as:to', 'as:cc', 'as:bto', 'as:bcc'] as $element) {
501 if ((empty($object_data['receiver_urls'][$element]) || in_array($element, ['as:bto', 'as:bcc'])) && !empty($urls[$element])) {
502 $object_data['receiver_urls'][$element] = array_unique(array_merge($object_data['receiver_urls'][$element] ?? [], $urls[$element]));
506 $object_data['type'] = $type;
507 $object_data['actor'] = $actor;
508 $object_data['item_receiver'] = $receivers;
509 $object_data['receiver'] = array_replace($object_data['receiver'] ?? [], $receivers);
510 $object_data['reception_type'] = array_replace($object_data['reception_type'] ?? [], $reception_types);
512 // This check here interferes with Hubzilla posts where the author host differs from the host the post was created
513 // $author = $object_data['author'] ?? $actor;
514 // if (!empty($author) && !empty($object_data['id'])) {
515 // $author_host = parse_url($author, PHP_URL_HOST);
516 // $id_host = parse_url($object_data['id'], PHP_URL_HOST);
517 // if ($author_host == $id_host) {
518 // Logger::info('Valid hosts', ['type' => $type, 'host' => $id_host]);
520 // Logger::notice('Differing hosts on author and id', ['type' => $type, 'author' => $author_host, 'id' => $id_host]);
521 // $trust_source = false;
525 $account = Contact::selectFirstAccount(['platform'], ['nurl' => Strings::normaliseLink($actor)]);
526 $platform = $account['platform'] ?? '';
528 Logger::info('Processing', ['type' => $object_data['type'], 'object_type' => $object_data['object_type'], 'id' => $object_data['id'], 'actor' => $actor, 'platform' => $platform]);
534 * Fetches the first user id from the receiver array
536 * @param array $receivers Array with receivers
537 * @return integer user id;
539 public static function getFirstUserFromReceivers(array $receivers): int
541 foreach ($receivers as $receiver) {
542 if (!empty($receiver)) {
550 * Processes the activity object
552 * @param array $activity Array with activity data
553 * @param string $body The unprocessed body
554 * @param int|null $uid User ID
555 * @param boolean $trust_source Do we trust the source?
556 * @param boolean $push Message had been pushed to our system
557 * @param array $signer The signer of the post
561 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
562 * @throws \ImagickException
564 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
566 $type = JsonLD::fetchElement($activity, '@type');
568 Logger::info('Empty type', ['activity' => $activity]);
572 if ($type == 'as:View') {
573 Logger::info('View activities are ignored.', ['signer' => $signer, 'http_signer' => $http_signer]);
577 if (!JsonLD::fetchElement($activity, 'as:object', '@id')) {
578 Logger::info('Empty object', ['activity' => $activity]);
582 $actor = JsonLD::fetchElement($activity, 'as:actor', '@id');
584 Logger::info('Empty actor', ['activity' => $activity]);
588 if (is_array($activity['as:object'])) {
589 $attributed_to = JsonLD::fetchElement($activity['as:object'], 'as:attributedTo', '@id');
594 // Test the provided signatures against the actor and "attributedTo"
596 if (!empty($attributed_to) && !empty($actor)) {
597 $trust_source = (in_array($actor, $signer) && in_array($attributed_to, $signer));
599 $trust_source = in_array($actor, $signer);
603 // $trust_source is called by reference and is set to true if the content was retrieved successfully
604 $object_data = self::prepareObjectData($activity, $uid, $push, $trust_source);
605 if (empty($object_data)) {
606 Logger::info('No object data found', ['activity' => $activity]);
610 // Lemmy is announcing activities.
611 // We are changing the announces into regular activities.
612 if (($type == 'as:Announce') && in_array($object_data['type'] ?? '', array_merge(self::ACTIVITY_TYPES, ['as:Delete', 'as:Undo', 'as:Update']))) {
613 Logger::debug('Change type of announce to activity', ['type' => $object_data['type']]);
614 $type = $object_data['type'];
617 if (!empty($body) && empty($object_data['raw'])) {
618 $object_data['raw'] = $body;
621 // Internal flag for thread completion. See Processor.php
622 if (!empty($activity['thread-completion'])) {
623 $object_data['thread-completion'] = $activity['thread-completion'];
626 if (!empty($activity['completion-mode'])) {
627 $object_data['completion-mode'] = $activity['completion-mode'];
630 if (!empty($activity['thread-children-type'])) {
631 $object_data['thread-children-type'] = $activity['thread-children-type'];
634 // Internal flag for posts that arrived via relay
635 if (!empty($activity['from-relay'])) {
636 $object_data['from-relay'] = $activity['from-relay'];
639 if ($type == 'as:Announce') {
640 $object_data['object_activity'] = $activity;
643 if (($type == 'as:Create') && $trust_source) {
644 if (self::hasArrived($object_data['object_id'])) {
645 Logger::info('The activity already arrived.', ['id' => $object_data['object_id']]);
648 self::addArrivedId($object_data['object_id']);
650 if (Queue::exists($object_data['object_id'], $type)) {
651 Logger::info('The activity is already added.', ['id' => $object_data['object_id']]);
656 if (DI::config()->get('system', 'decoupled_receiver') && ($trust_source || DI::config()->get('debug', 'ap_inbox_store_untrusted'))) {
657 $object_data = Queue::add($object_data, $type, $uid, $http_signer, $push, $trust_source);
660 if (!$trust_source) {
661 Logger::info('Activity trust could not be achieved.', ['id' => $object_data['object_id'], 'type' => $type, 'signer' => $signer, 'actor' => $actor, 'attributedTo' => $attributed_to]);
665 if (!empty($object_data['entry-id']) && DI::config()->get('system', 'decoupled_receiver') && ($push || ($completion == self::COMPLETION_RELAY))) {
666 if (Queue::isProcessable($object_data['entry-id'])) {
667 // We delay by 5 seconds to allow to accumulate all receivers
668 $delayed = date(DateTimeFormat::MYSQL, time() + 5);
669 Logger::debug('Initiate processing', ['id' => $object_data['entry-id'], 'uri' => $object_data['object_id']]);
670 $wid = Worker::add(['priority' => Worker::PRIORITY_HIGH, 'delayed' => $delayed], 'ProcessQueue', $object_data['entry-id']);
671 Queue::setWorkerId($object_data['entry-id'], $wid);
673 Logger::debug('Other queue entries need to be processed first.', ['id' => $object_data['entry-id']]);
678 if (!empty($activity['recursion-depth'])) {
679 $object_data['recursion-depth'] = $activity['recursion-depth'];
682 if (!self::routeActivities($object_data, $type, $push)) {
683 self::storeUnhandledActivity(true, $type, $object_data, $activity, $body, $uid, $trust_source, $push, $signer);
684 Queue::remove($object_data);
692 * @param array $object_data
693 * @param string $type
695 * @param bool $fetch_parents
697 * @return boolean Could the activity be routed?
699 public static function routeActivities(array $object_data, string $type, bool $push, bool $fetch_parents = true): bool
701 $activity = $object_data['object_activity'] ?? [];
705 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
706 $item = ActivityPub\Processor::createItem($object_data, $fetch_parents);
707 ActivityPub\Processor::postItem($object_data, $item);
708 } elseif (in_array($object_data['object_type'], ['pt:CacheFile'])) {
709 // Unhandled Peertube activity
710 Queue::remove($object_data);
711 } elseif (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
712 ActivityPub\Processor::updatePerson($object_data);
719 if (in_array($object_data['object_type'], ['as:Event'])) {
720 $item = ActivityPub\Processor::createItem($object_data, $fetch_parents);
721 ActivityPub\Processor::postItem($object_data, $item);
728 if ($object_data['object_type'] == 'as:tag') {
729 ActivityPub\Processor::addTag($object_data);
730 } elseif (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
731 ActivityPub\Processor::addToFeaturedCollection($object_data);
732 } elseif (in_array($object_data['object_type'], ['as:Tombstone', ''])) {
733 // We don't have the object here or it is deleted. We ignore this activity.
734 Queue::remove($object_data);
741 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
742 $actor = JsonLD::fetchElement($activity, 'as:actor', '@id');
743 $object_data['thread-completion'] = Contact::getIdForURL($actor);
744 $object_data['completion-mode'] = self::COMPLETION_ANNOUCE;
746 if (!Post::exists(['uri' => $object_data['id'], 'uid' => 0])) {
747 $item = ActivityPub\Processor::createItem($object_data, $fetch_parents);
749 Logger::debug('announced id was not created', ['id' => $object_data['id']]);
750 Queue::remove($object_data);
754 $item['post-reason'] = Item::PR_ANNOUNCEMENT;
755 ActivityPub\Processor::postItem($object_data, $item);
756 Logger::debug('Created announced id', ['id' => $object_data['id']]);
758 Logger::info('Announced id already exists', ['id' => $object_data['id']]);
759 Queue::remove($object_data);
762 if (!empty($activity)) {
763 $announce_object_data = self::processObject($activity);
764 $announce_object_data['name'] = $type;
765 $announce_object_data['author'] = $actor;
766 $announce_object_data['object_id'] = $object_data['id'];
767 $announce_object_data['object_type'] = $object_data['object_type'];
768 $announce_object_data['push'] = $push;
769 Logger::debug('Create announce activity', ['id' => $announce_object_data['id'], 'object_data' => $announce_object_data]);
771 if (!empty($object_data['raw'])) {
772 $announce_object_data['raw'] = $object_data['raw'];
774 if (!empty($object_data['raw-object'])) {
775 $announce_object_data['raw-object'] = $object_data['raw-object'];
777 ActivityPub\Processor::createActivity($announce_object_data, Activity::ANNOUNCE);
785 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
786 ActivityPub\Processor::createActivity($object_data, Activity::LIKE);
787 } elseif (in_array($object_data['object_type'], ['as:Tombstone', ''])) {
788 // We don't have the object here or it is deleted. We ignore this activity.
789 Queue::remove($object_data);
796 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
797 ActivityPub\Processor::createActivity($object_data, Activity::DISLIKE);
798 } elseif (in_array($object_data['object_type'], ['as:Tombstone', ''])) {
799 // We don't have the object here or it is deleted. We ignore this activity.
800 Queue::remove($object_data);
806 case 'as:TentativeAccept':
807 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
808 ActivityPub\Processor::createActivity($object_data, Activity::ATTENDMAYBE);
815 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
816 ActivityPub\Processor::updateItem($object_data);
817 } elseif (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
818 ActivityPub\Processor::updatePerson($object_data);
819 } elseif (in_array($object_data['object_type'], ['pt:CacheFile'])) {
820 // Unhandled Peertube activity
821 Queue::remove($object_data);
828 if (in_array($object_data['object_type'], array_merge(['as:Tombstone'], self::CONTENT_TYPES))) {
829 ActivityPub\Processor::deleteItem($object_data);
830 } elseif (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
831 ActivityPub\Processor::deletePerson($object_data);
832 } elseif ($object_data['object_type'] == '') {
833 // The object type couldn't be determined. Most likely we don't have it here. We ignore this activity.
834 Queue::remove($object_data);
841 if (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
842 ActivityPub\Processor::movePerson($object_data);
849 if (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
850 ActivityPub\Processor::blockAccount($object_data);
857 if (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
858 ActivityPub\Processor::ReportAccount($object_data);
865 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
866 ActivityPub\Processor::removeFromFeaturedCollection($object_data);
867 } elseif (in_array($object_data['object_type'], ['as:Tombstone', ''])) {
868 // We don't have the object here or it is deleted. We ignore this activity.
869 Queue::remove($object_data);
876 if (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
877 ActivityPub\Processor::followUser($object_data);
878 } elseif (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
879 $object_data['reply-to-id'] = $object_data['object_id'];
880 ActivityPub\Processor::createActivity($object_data, Activity::FOLLOW);
887 if ($object_data['object_type'] == 'as:Follow') {
888 if (!empty($object_data['object_actor'])) {
889 ActivityPub\Processor::acceptFollowUser($object_data);
891 Logger::notice('Unhandled "accept follow" message.', ['object_data' => $object_data]);
893 } elseif (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
894 ActivityPub\Processor::createActivity($object_data, Activity::ATTEND);
895 } elseif (!empty($object_data['object_id']) && empty($object_data['object_actor']) && empty($object_data['object_type'])) {
896 // Follow acceptances from gup.pe only contain the object id
897 ActivityPub\Processor::acceptFollowUser($object_data);
904 if ($object_data['object_type'] == 'as:Follow') {
905 ActivityPub\Processor::rejectFollowUser($object_data);
906 } elseif (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
907 ActivityPub\Processor::createActivity($object_data, Activity::ATTENDNO);
914 if (($object_data['object_type'] == 'as:Follow') &&
915 in_array($object_data['object_object_type'], self::ACCOUNT_TYPES)) {
916 ActivityPub\Processor::undoFollowUser($object_data);
917 } elseif (($object_data['object_type'] == 'as:Follow') &&
918 in_array($object_data['object_object_type'], self::CONTENT_TYPES)) {
919 ActivityPub\Processor::undoActivity($object_data);
920 } elseif (($object_data['object_type'] == 'as:Accept') &&
921 in_array($object_data['object_object_type'], self::ACCOUNT_TYPES)) {
922 ActivityPub\Processor::rejectFollowUser($object_data);
923 } elseif (($object_data['object_type'] == 'as:Block') &&
924 in_array($object_data['object_object_type'], self::ACCOUNT_TYPES)) {
925 ActivityPub\Processor::unblockAccount($object_data);
926 } elseif (in_array($object_data['object_type'], array_merge(self::ACTIVITY_TYPES, ['as:Announce', 'as:Create', ''])) &&
927 empty($object_data['object_object_type'])) {
928 // We cannot detect the target object. So we can ignore it.
929 Queue::remove($object_data);
930 } elseif (in_array($object_data['object_type'], array_merge(self::ACTIVITY_TYPES, ['as:Announce'])) &&
931 in_array($object_data['object_object_type'], array_merge(['as:Tombstone'], self::CONTENT_TYPES))) {
932 ActivityPub\Processor::undoActivity($object_data);
933 } elseif (in_array($object_data['object_type'], ['as:Create']) &&
934 in_array($object_data['object_object_type'], ['pt:CacheFile'])) {
935 // Unhandled Peertube activity
936 Queue::remove($object_data);
937 } elseif (in_array($object_data['object_type'], ['as:Delete'])) {
938 // We cannot undo deletions, so we just ignore this
939 Queue::remove($object_data);
940 } elseif (in_array($object_data['object_object_type'], ['as:Tombstone'])) {
941 // The object is a tombstone, we ignore any actions on it.
942 Queue::remove($object_data);
949 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
950 ActivityPub\Processor::createActivity($object_data, Activity::VIEW);
951 } elseif (in_array($object_data['object_type'], ['as:Tombstone', ''])) {
952 // We don't have the object here or it is deleted. We ignore this activity.
953 Queue::remove($object_data);
959 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
960 ActivityPub\Processor::createActivity($object_data, Activity::READ);
961 } elseif (in_array($object_data['object_type'], ['as:Tombstone', ''])) {
962 // We don't have the object here or it is deleted. We ignore this activity.
963 Queue::remove($object_data);
969 case 'litepub:EmojiReact':
970 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
971 ActivityPub\Processor::createActivity($object_data, Activity::EMOJIREACT);
972 } elseif (in_array($object_data['object_type'], ['as:Tombstone', ''])) {
973 // We don't have the object here or it is deleted. We ignore this activity.
974 Queue::remove($object_data);
981 Logger::info('Unknown activity: ' . $type . ' ' . $object_data['object_type']);
988 * Stores unhandled or unknown Activities as a file
990 * @param boolean $unknown "true" if the activity is unknown, "false" if it is unhandled
991 * @param string $type Activity type
992 * @param array $object_data Preprocessed array that is generated out of the received activity
993 * @param array $activity Array with activity data
994 * @param string $body The unprocessed body
995 * @param integer $uid User ID
996 * @param boolean $trust_source Do we trust the source?
997 * @param boolean $push Message had been pushed to our system
998 * @param array $signer The signer of the post
1001 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 = [])
1003 if (!DI::config()->get('debug', 'ap_log_unknown')) {
1007 $file = ($unknown ? 'unknown-' : 'unhandled-') . str_replace(':', '-', $type) . '-';
1009 if (!empty($object_data['object_type'])) {
1010 $file .= str_replace(':', '-', $object_data['object_type']) . '-';
1013 if (!empty($object_data['object_object_type'])) {
1014 $file .= str_replace(':', '-', $object_data['object_object_type']) . '-';
1017 $tempfile = tempnam(System::getTempPath(), $file);
1018 file_put_contents($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));
1019 Logger::notice('Unknown activity stored', ['type' => $type, 'object_type' => $object_data['object_type'], 'object_object_type' => $object_data['object_object_type'] ?? '', 'file' => $tempfile]);
1023 * Fetch a user id from an activity array
1025 * @param array $activity
1026 * @param string $actor
1028 * @return int user id
1030 public static function getBestUserForActivity(array $activity): int
1033 $actor = JsonLD::fetchElement($activity, 'as:actor', '@id') ?? '';
1035 $receivers = self::getReceivers($activity, $actor, [], false, false);
1036 foreach ($receivers as $receiver) {
1037 if ($receiver['type'] == self::TARGET_GLOBAL) {
1040 if (empty($uid) || ($receiver['type'] == self::TARGET_TO)) {
1041 $uid = $receiver['uid'];
1045 // When we haven't found any user yet, we just chose a user who most likely could have access to the content
1047 $contact = Contact::selectFirst(['uid'], ['nurl' => Strings::normaliseLink($actor), 'rel' => [Contact::SHARING, Contact::FRIEND]]);
1048 if (!empty($contact['uid'])) {
1049 $uid = $contact['uid'];
1056 // @TODO Missing documentation
1057 public static function getReceiverURL(array $activity): array
1061 foreach (['as:to', 'as:cc', 'as:bto', 'as:bcc'] as $element) {
1062 $receiver_list = JsonLD::fetchElementArray($activity, $element, '@id');
1063 if (empty($receiver_list)) {
1067 foreach ($receiver_list as $receiver) {
1068 if ($receiver == self::PUBLIC_COLLECTION) {
1069 $receiver = ActivityPub::PUBLIC_COLLECTION;
1071 $urls[$element][] = $receiver;
1079 * Fetch the receiver list from an activity array
1081 * @param array $activity
1082 * @param string $actor
1083 * @param array $tags
1084 * @param bool $fetch_unlisted
1087 * @return array with receivers (user id)
1088 * @throws \Exception
1090 private static function getReceivers(array $activity, string $actor, array $tags, bool $fetch_unlisted, bool $push): array
1092 $reply = $receivers = $profile = [];
1094 // When it is an answer, we inherite the receivers from the parent
1095 $replyto = JsonLD::fetchElement($activity, 'as:inReplyTo', '@id');
1096 if (!empty($replyto)) {
1097 $reply = [$replyto];
1099 // Fix possibly wrong item URI (could be an answer to a plink uri)
1100 $fixedReplyTo = Item::getURIByLink($replyto);
1101 if (!empty($fixedReplyTo)) {
1102 $reply[] = $fixedReplyTo;
1106 // Fetch all posts that refer to the object id
1107 $object_id = JsonLD::fetchElement($activity, 'as:object', '@id');
1108 if (!empty($object_id)) {
1109 $reply[] = $object_id;
1112 if (!empty($reply)) {
1113 $parents = Post::select(['uid'], DBA::mergeConditions(['uri' => $reply], ["`uid` != ?", 0]));
1114 while ($parent = Post::fetch($parents)) {
1115 $receivers[$parent['uid']] = ['uid' => $parent['uid'], 'type' => self::TARGET_ANSWER];
1117 DBA::close($parents);
1120 if (!empty($actor)) {
1121 $profile = APContact::getByURL($actor);
1122 $followers = $profile['followers'] ?? '';
1123 $is_forum = ($actor['type'] ?? '') == 'Group';
1125 Contact::updateByUrlIfNeeded($actor);
1127 Logger::info('Got actor and followers', ['actor' => $actor, 'followers' => $followers]);
1129 Logger::info('Empty actor', ['activity' => $activity]);
1134 // We have to prevent false follower assumptions upon thread completions
1135 $follower_target = empty($activity['thread-completion']) ? self::TARGET_FOLLOWER : self::TARGET_UNKNOWN;
1137 foreach (['as:to', 'as:cc', 'as:bto', 'as:bcc'] as $element) {
1138 $receiver_list = JsonLD::fetchElementArray($activity, $element, '@id');
1139 if (empty($receiver_list)) {
1143 foreach ($receiver_list as $receiver) {
1144 if ($receiver == self::PUBLIC_COLLECTION) {
1145 $receivers[0] = ['uid' => 0, 'type' => self::TARGET_GLOBAL];
1148 // Add receiver "-1" for unlisted posts
1149 if ($fetch_unlisted && ($receiver == self::PUBLIC_COLLECTION) && ($element == 'as:cc')) {
1150 $receivers[-1] = ['uid' => -1, 'type' => self::TARGET_GLOBAL];
1153 // Fetch the receivers for the public and the followers collection
1154 if ((($receiver == $followers) || (($receiver == self::PUBLIC_COLLECTION) && !$is_forum)) && !empty($actor)) {
1155 $receivers = self::getReceiverForActor($actor, $tags, $receivers, $follower_target, $profile);
1159 // Fetching all directly addressed receivers
1160 $condition = ['self' => true, 'nurl' => Strings::normaliseLink($receiver)];
1161 $contact = DBA::selectFirst('contact', ['uid', 'contact-type'], $condition);
1162 if (!DBA::isResult($contact)) {
1166 // Check if the potential receiver is following the actor
1167 // Exception: The receiver is targetted via "to" or this is a comment
1168 if ((($element != 'as:to') && empty($replyto)) || ($contact['contact-type'] == Contact::TYPE_COMMUNITY)) {
1169 $networks = Protocol::FEDERATED;
1170 $condition = ['nurl' => Strings::normaliseLink($actor), 'rel' => [Contact::SHARING, Contact::FRIEND],
1171 'network' => $networks, 'archive' => false, 'pending' => false, 'uid' => $contact['uid']];
1173 // Forum posts are only accepted from forum contacts
1174 if ($contact['contact-type'] == Contact::TYPE_COMMUNITY) {
1175 $condition['rel'] = [Contact::SHARING, Contact::FRIEND, Contact::FOLLOWER];
1178 if (!DBA::exists('contact', $condition)) {
1183 $type = $receivers[$contact['uid']]['type'] ?? self::TARGET_UNKNOWN;
1184 if (in_array($type, [self::TARGET_UNKNOWN, self::TARGET_FOLLOWER, self::TARGET_ANSWER, self::TARGET_GLOBAL])) {
1187 $type = self::TARGET_TO;
1190 $type = self::TARGET_CC;
1193 $type = self::TARGET_BTO;
1196 $type = self::TARGET_BCC;
1200 $receivers[$contact['uid']] = ['uid' => $contact['uid'], 'type' => $type];
1205 self::switchContacts($receivers, $actor);
1207 // "birdsitelive" is a service that mirrors tweets into the fediverse
1208 // These posts can be fetched without authentification, but are not marked as public
1209 // We treat them as unlisted posts to be able to handle them.
1210 if (empty($receivers) && $fetch_unlisted && Contact::isPlatform($actor, 'birdsitelive')) {
1211 $receivers[0] = ['uid' => 0, 'type' => self::TARGET_GLOBAL];
1212 $receivers[-1] = ['uid' => -1, 'type' => self::TARGET_GLOBAL];
1213 Logger::notice('Post from "birdsitelive" is set to "unlisted"', ['id' => JsonLD::fetchElement($activity, '@id')]);
1214 } elseif (empty($receivers)) {
1215 Logger::notice('Post has got no receivers', ['fetch_unlisted' => $fetch_unlisted, 'actor' => $actor, 'id' => JsonLD::fetchElement($activity, '@id'), 'type' => JsonLD::fetchElement($activity, '@type')]);
1222 * Fetch the receiver list of a given actor
1224 * @param string $actor
1225 * @param array $tags
1226 * @param array $receivers
1227 * @param integer $target_type
1228 * @param array $profile
1230 * @return array with receivers (user id)
1231 * @throws \Exception
1233 private static function getReceiverForActor(string $actor, array $tags, array $receivers, int $target_type, array $profile): array
1235 $basecondition = ['rel' => [Contact::SHARING, Contact::FRIEND, Contact::FOLLOWER],
1236 'network' => Protocol::FEDERATED, 'archive' => false, 'pending' => false];
1238 if (!empty($profile['uri-id'])) {
1239 $condition = DBA::mergeConditions($basecondition, ["`uri-id` = ? AND `uid` != ?", $profile['uri-id'], 0]);
1240 $contacts = DBA::select('contact', ['uid', 'rel'], $condition);
1241 while ($contact = DBA::fetch($contacts)) {
1242 if (empty($receivers[$contact['uid']]) && self::isValidReceiverForActor($contact, $tags)) {
1243 $receivers[$contact['uid']] = ['uid' => $contact['uid'], 'type' => $target_type];
1246 DBA::close($contacts);
1248 // This part will only be called while post update 1426 wasn't finished
1249 $condition = DBA::mergeConditions($basecondition, ["`nurl` = ? AND `uid` != ?", Strings::normaliseLink($actor), 0]);
1250 $contacts = DBA::select('contact', ['uid', 'rel'], $condition);
1251 while ($contact = DBA::fetch($contacts)) {
1252 if (empty($receivers[$contact['uid']]) && self::isValidReceiverForActor($contact, $tags)) {
1253 $receivers[$contact['uid']] = ['uid' => $contact['uid'], 'type' => $target_type];
1256 DBA::close($contacts);
1258 // The queries are split because of performance issues
1259 $condition = DBA::mergeConditions($basecondition, ["`alias` IN (?, ?) AND `uid` != ?", Strings::normaliseLink($actor), $actor, 0]);
1260 $contacts = DBA::select('contact', ['uid', 'rel'], $condition);
1261 while ($contact = DBA::fetch($contacts)) {
1262 if (empty($receivers[$contact['uid']]) && self::isValidReceiverForActor($contact, $tags)) {
1263 $receivers[$contact['uid']] = ['uid' => $contact['uid'], 'type' => $target_type];
1266 DBA::close($contacts);
1272 * Tests if the contact is a valid receiver for this actor
1274 * @param array $contact
1275 * @param array $tags
1277 * @return bool with receivers (user id)
1278 * @throws \Exception
1280 private static function isValidReceiverForActor(array $contact, array $tags): bool
1282 // Are we following the contact? Then this is a valid receiver
1283 if (in_array($contact['rel'], [Contact::SHARING, Contact::FRIEND])) {
1287 // When the possible receiver isn't a community, then it is no valid receiver
1288 $owner = User::getOwnerDataById($contact['uid']);
1289 if (empty($owner) || ($owner['contact-type'] != Contact::TYPE_COMMUNITY)) {
1293 // Is the community account tagged?
1294 foreach ($tags as $tag) {
1295 if ($tag['type'] != 'Mention') {
1299 if (Strings::compareLink($tag['href'], $owner['url'])) {
1308 * Switches existing contacts to ActivityPub
1310 * @param integer $cid Contact ID
1311 * @param integer $uid User ID
1312 * @param string $url Profile URL
1314 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1315 * @throws \ImagickException
1317 public static function switchContact(int $cid, int $uid, string $url)
1319 if (DBA::exists('contact', ['id' => $cid, 'network' => Protocol::ACTIVITYPUB])) {
1320 Logger::info('Contact is already ActivityPub', ['id' => $cid, 'uid' => $uid, 'url' => $url]);
1324 if (Contact::updateFromProbe($cid)) {
1325 Logger::info('Update was successful', ['id' => $cid, 'uid' => $uid, 'url' => $url]);
1328 // Send a new follow request to be sure that the connection still exists
1329 if (($uid != 0) && DBA::exists('contact', ['id' => $cid, 'rel' => [Contact::SHARING, Contact::FRIEND], 'network' => Protocol::ACTIVITYPUB])) {
1330 Logger::info('Contact had been switched to ActivityPub. Sending a new follow request.', ['uid' => $uid, 'url' => $url]);
1331 ActivityPub\Transmitter::sendActivity('Follow', $url, $uid);
1336 * @TODO Fix documentation and type-hints
1341 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1342 * @throws \ImagickException
1344 private static function switchContacts($receivers, $actor)
1346 if (empty($actor)) {
1350 foreach ($receivers as $receiver) {
1351 $contact = DBA::selectFirst('contact', ['id'], ['uid' => $receiver['uid'], 'network' => Protocol::OSTATUS, 'nurl' => Strings::normaliseLink($actor)]);
1352 if (DBA::isResult($contact)) {
1353 self::switchContact($contact['id'], $receiver['uid'], $actor);
1356 $contact = DBA::selectFirst('contact', ['id'], ['uid' => $receiver['uid'], 'network' => Protocol::OSTATUS, 'alias' => [Strings::normaliseLink($actor), $actor]]);
1357 if (DBA::isResult($contact)) {
1358 self::switchContact($contact['id'], $receiver['uid'], $actor);
1364 * @TODO Fix documentation and type-hints
1366 * @param $object_data
1367 * @param array $activity
1371 private static function addActivityFields($object_data, array $activity)
1373 if (!empty($activity['published']) && empty($object_data['published'])) {
1374 $object_data['published'] = JsonLD::fetchElement($activity, 'as:published', '@value');
1377 if (!empty($activity['diaspora:guid']) && empty($object_data['diaspora:guid'])) {
1378 $object_data['diaspora:guid'] = JsonLD::fetchElement($activity, 'diaspora:guid', '@value');
1381 $object_data['service'] = JsonLD::fetchElement($activity, 'as:instrument', 'as:name', '@type', 'as:Service');
1382 $object_data['service'] = JsonLD::fetchElement($object_data, 'service', '@value');
1384 if (!empty($object_data['object_id'])) {
1385 // Some systems (e.g. GNU Social) don't reply to the "id" field but the "uri" field.
1386 $objectId = Item::getURIByLink($object_data['object_id']);
1387 if (!empty($objectId) && ($object_data['object_id'] != $objectId)) {
1388 Logger::notice('Fix wrong object-id', ['received' => $object_data['object_id'], 'correct' => $objectId]);
1389 $object_data['object_id'] = $objectId;
1393 return $object_data;
1397 * Fetches the object data from external ressources if needed
1399 * @param string $object_id Object ID of the the provided object
1400 * @param array $object The provided object array
1401 * @param boolean $trust_source Do we trust the provided object?
1402 * @param integer $uid User ID for the signature that we use to fetch data
1404 * @return array|false with trusted and valid object data
1405 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1406 * @throws \ImagickException
1408 private static function fetchObject(string $object_id, array $object = [], bool $trust_source = false, int $uid = 0)
1410 // By fetching the type we check if the object is complete.
1411 $type = JsonLD::fetchElement($object, '@type');
1413 if (!$trust_source || empty($type)) {
1414 $data = Processor::fetchCachedActivity($object_id, $uid);
1415 if (!empty($data)) {
1416 $object = JsonLD::compact($data);
1417 Logger::info('Fetched content for ' . $object_id);
1419 Logger::info('Empty content for ' . $object_id . ', check if content is available locally.');
1421 $item = Post::selectFirst(Item::DELIVER_FIELDLIST, ['uri' => $object_id]);
1422 if (!DBA::isResult($item)) {
1423 Logger::info('Object with url ' . $object_id . ' was not found locally.');
1426 Logger::info('Using already stored item for url ' . $object_id);
1427 $data = ActivityPub\Transmitter::createNote($item);
1428 $object = JsonLD::compact($data);
1431 $id = JsonLD::fetchElement($object, '@id');
1433 Logger::info('Empty id');
1437 if ($id != $object_id) {
1438 Logger::info('Fetched id differs from provided id', ['provided' => $object_id, 'fetched' => $id]);
1442 Logger::info('Using original object for url ' . $object_id);
1445 $type = JsonLD::fetchElement($object, '@type');
1447 Logger::info('Empty type');
1451 // Lemmy is resharing "create" activities instead of content
1452 // We fetch the content from the activity.
1453 if (in_array($type, ['as:Create'])) {
1454 $object = $object['as:object'];
1455 $type = JsonLD::fetchElement($object, '@type');
1457 Logger::info('Empty type');
1460 $object_data = self::processObject($object);
1463 // We currently don't handle 'pt:CacheFile', but with this step we avoid logging
1464 if (in_array($type, self::CONTENT_TYPES) || ($type == 'pt:CacheFile')) {
1465 $object_data = self::processObject($object);
1467 if (!empty($data)) {
1468 $object_data['raw-object'] = json_encode($data);
1470 return $object_data;
1473 if ($type == 'as:Announce') {
1474 $object_id = JsonLD::fetchElement($object, 'object', '@id');
1475 if (empty($object_id) || !is_string($object_id)) {
1478 return self::fetchObject($object_id, [], false, $uid);
1481 Logger::info('Unhandled object type: ' . $type);
1486 * Converts the language element (Used by Peertube)
1488 * @param array $languages
1489 * @return array Languages
1491 public static function processLanguages(array $languages): array
1493 if (empty($languages)) {
1497 $language_list = [];
1499 foreach ($languages as $language) {
1500 if (!empty($language['_:identifier']) && !empty($language['as:name'])) {
1501 $language_list[$language['_:identifier']] = $language['as:name'];
1504 return $language_list;
1508 * Convert tags from JSON-LD format into a simplified format
1510 * @param array $tags Tags in JSON-LD format
1512 * @return array with tags in a simplified format
1514 public static function processTags(array $tags): array
1518 foreach ($tags as $tag) {
1523 $element = ['type' => str_replace('as:', '', JsonLD::fetchElement($tag, '@type') ?? ''),
1524 'href' => JsonLD::fetchElement($tag, 'as:href', '@id'),
1525 'name' => JsonLD::fetchElement($tag, 'as:name', '@value')];
1527 if (empty($element['type'])) {
1531 if (empty($element['href'])) {
1532 $element['href'] = $element['name'];
1535 $taglist[] = $element;
1541 * Convert emojis from JSON-LD format into a simplified format
1543 * @param array $emojis
1544 * @return array with emojis in a simplified format
1546 private static function processEmojis(array $emojis): array
1550 foreach ($emojis as $emoji) {
1551 if (empty($emoji) || (JsonLD::fetchElement($emoji, '@type') != 'toot:Emoji') || empty($emoji['as:icon'])) {
1555 $url = JsonLD::fetchElement($emoji['as:icon'], 'as:url', '@id');
1556 $element = ['name' => JsonLD::fetchElement($emoji, 'as:name', '@value'),
1559 $emojilist[] = $element;
1566 * Convert attachments from JSON-LD format into a simplified format
1568 * @param array $attachments Attachments in JSON-LD format
1570 * @return array Attachments in a simplified format
1572 private static function processAttachments(array $attachments): array
1576 // Removes empty values
1577 $attachments = array_filter($attachments);
1579 foreach ($attachments as $attachment) {
1580 switch (JsonLD::fetchElement($attachment, '@type')) {
1585 $urls = JsonLD::fetchElementArray($attachment, 'as:url');
1586 foreach ($urls as $url) {
1587 // Single scalar URL case
1588 if (is_string($url)) {
1593 $href = JsonLD::fetchElement($url, 'as:href', '@id');
1594 $mediaType = JsonLD::fetchElement($url, 'as:mediaType', '@value');
1595 if (Strings::startsWith($mediaType, 'image')) {
1604 'title' => JsonLD::fetchElement($attachment, 'as:name', '@value'),
1605 'desc' => JsonLD::fetchElement($attachment, 'as:summary', '@value'),
1607 'image' => $pageImage,
1611 $mediaType = JsonLD::fetchElement($attachment, 'as:mediaType', '@value');
1612 $imageFullUrl = JsonLD::fetchElement($attachment, 'as:url', '@id');
1613 $imagePreviewUrl = null;
1615 if (!$imageFullUrl && ($urls = JsonLD::fetchElementArray($attachment, 'as:url'))) {
1616 $imageVariants = [];
1617 $previewVariants = [];
1618 foreach ($urls as $url) {
1619 // Scalar URL, no discrimination possible
1620 if (is_string($url)) {
1621 $imageFullUrl = $url;
1625 // Not sure what to do with a different Link media type than the base Image, we skip
1626 if ($mediaType != JsonLD::fetchElement($url, 'as:mediaType', '@value')) {
1630 $href = JsonLD::fetchElement($url, 'as:href', '@id');
1632 // Default URL choice if no discriminating width is provided
1633 $imageFullUrl = $href ?? $imageFullUrl;
1635 $width = intval(JsonLD::fetchElement($url, 'as:width', '@value') ?? 1);
1637 if ($href && $width) {
1638 $imageVariants[$width] = $href;
1639 // 632 is the ideal width for full screen frio posts, we compute the absolute distance to it
1640 $previewVariants[abs(632 - $width)] = $href;
1644 if ($imageVariants) {
1645 // Taking the maximum size image
1646 ksort($imageVariants);
1647 $imageFullUrl = array_pop($imageVariants);
1649 // Taking the minimum number distance to the target distance
1650 ksort($previewVariants);
1651 $imagePreviewUrl = array_shift($previewVariants);
1654 unset($imageVariants);
1655 unset($previewVariants);
1659 'type' => str_replace('as:', '', JsonLD::fetchElement($attachment, '@type')),
1660 'mediaType' => $mediaType,
1661 'name' => JsonLD::fetchElement($attachment, 'as:name', '@value'),
1662 'url' => $imageFullUrl,
1663 'image' => $imagePreviewUrl !== $imageFullUrl ? $imagePreviewUrl : null,
1668 'type' => str_replace('as:', '', JsonLD::fetchElement($attachment, '@type')),
1669 'mediaType' => JsonLD::fetchElement($attachment, 'as:mediaType', '@value'),
1670 'name' => JsonLD::fetchElement($attachment, 'as:name', '@value'),
1671 'url' => JsonLD::fetchElement($attachment, 'as:url', '@id'),
1672 'height' => JsonLD::fetchElement($attachment, 'as:height', '@value'),
1673 'width' => JsonLD::fetchElement($attachment, 'as:width', '@value'),
1674 'image' => JsonLD::fetchElement($attachment, 'as:image', '@id')
1683 * Convert questions from JSON-LD format into a simplified format
1685 * @param array $object
1687 * @return array Questions in a simplified format
1689 private static function processQuestion(array $object): array
1693 if (!empty($object['as:oneOf'])) {
1694 $question['multiple'] = false;
1695 $options = JsonLD::fetchElementArray($object, 'as:oneOf') ?? [];
1696 } elseif (!empty($object['as:anyOf'])) {
1697 $question['multiple'] = true;
1698 $options = JsonLD::fetchElementArray($object, 'as:anyOf') ?? [];
1703 $closed = JsonLD::fetchElement($object, 'as:closed', '@value');
1704 if (!empty($closed)) {
1705 $question['end-time'] = $closed;
1707 $question['end-time'] = JsonLD::fetchElement($object, 'as:endTime', '@value');
1710 $question['voters'] = (int)JsonLD::fetchElement($object, 'toot:votersCount', '@value');
1711 $question['options'] = [];
1715 foreach ($options as $option) {
1716 if (JsonLD::fetchElement($option, '@type') != 'as:Note') {
1720 $name = JsonLD::fetchElement($option, 'as:name', '@value');
1722 if (empty($option['as:replies'])) {
1726 $replies = JsonLD::fetchElement($option['as:replies'], 'as:totalItems', '@value');
1728 $question['options'][] = ['name' => $name, 'replies' => $replies];
1730 $voters += (int)$replies;
1733 // For single choice question we can count the number of voters if not provided (like with Misskey)
1734 if (empty($question['voters']) && !$question['multiple']) {
1735 $question['voters'] = $voters;
1742 * Fetch the original source or content with the "language" Markdown or HTML
1744 * @param array $object
1745 * @param array $object_data
1747 * @return array Object data (?)
1748 * @throws \Exception
1750 private static function getSource(array $object, array $object_data): array
1752 $object_data['source'] = JsonLD::fetchElement($object, 'as:source', 'as:content', 'as:mediaType', 'text/bbcode');
1753 $object_data['source'] = JsonLD::fetchElement($object_data, 'source', '@value');
1754 if (!empty($object_data['source'])) {
1755 return $object_data;
1758 $object_data['source'] = JsonLD::fetchElement($object, 'as:source', 'as:content', 'as:mediaType', 'text/markdown');
1759 $object_data['source'] = JsonLD::fetchElement($object_data, 'source', '@value');
1760 if (!empty($object_data['source'])) {
1761 $object_data['source'] = Markdown::toBBCode($object_data['source']);
1762 return $object_data;
1765 $object_data['source'] = JsonLD::fetchElement($object, 'as:source', 'as:content', 'as:mediaType', 'text/html');
1766 $object_data['source'] = JsonLD::fetchElement($object_data, 'source', '@value');
1767 if (!empty($object_data['source'])) {
1768 $object_data['source'] = HTML::toBBCode($object_data['source']);
1769 return $object_data;
1772 return $object_data;
1776 * Extracts a potential alternate URL from a list of additional URL elements
1778 * @param array $urls
1781 private static function extractAlternateUrl(array $urls): string
1784 foreach ($urls as $key => $url) {
1785 // Not a list but a single URL element
1786 if (!is_numeric($key)) {
1790 if (empty($url['@type']) || ($url['@type'] != 'as:Link')) {
1794 $href = JsonLD::fetchElement($url, 'as:href', '@id');
1799 $mediatype = JsonLD::fetchElement($url, 'as:mediaType');
1800 if (empty($mediatype)) {
1804 if ($mediatype == 'text/html') {
1805 $alternateUrl = $href;
1809 return $alternateUrl;
1813 * Check if the "as:url" element is an array with multiple links
1814 * This is the case with audio and video posts.
1815 * Then the links are added as attachments
1817 * @param array $urls The object URL list
1818 * @return array an array of attachments
1820 private static function processAttachmentUrls(array $urls): array
1823 foreach ($urls as $key => $url) {
1824 // Not a list but a single URL element
1825 if (!is_numeric($key)) {
1829 if (empty($url['@type']) || ($url['@type'] != 'as:Link')) {
1833 $href = JsonLD::fetchElement($url, 'as:href', '@id');
1838 $mediatype = JsonLD::fetchElement($url, 'as:mediaType');
1839 if (empty($mediatype)) {
1843 $filetype = strtolower(substr($mediatype, 0, strpos($mediatype, '/')));
1845 if ($filetype == 'audio') {
1846 $attachments[] = ['type' => $filetype, 'mediaType' => $mediatype, 'url' => $href, 'height' => null, 'size' => null, 'name' => ''];
1847 } elseif ($filetype == 'video') {
1848 $height = (int)JsonLD::fetchElement($url, 'as:height', '@value');
1849 // PeerTube audio-only track
1850 if ($height === 0) {
1854 $size = (int)JsonLD::fetchElement($url, 'pt:size', '@value');
1855 $attachments[] = ['type' => $filetype, 'mediaType' => $mediatype, 'url' => $href, 'height' => $height, 'size' => $size, 'name' => ''];
1856 } elseif (in_array($mediatype, ['application/x-bittorrent', 'application/x-bittorrent;x-scheme-handler/magnet'])) {
1857 $height = (int)JsonLD::fetchElement($url, 'as:height', '@value');
1859 // For Torrent links we always store the highest resolution
1860 if (!empty($attachments[$mediatype]['height']) && ($height < $attachments[$mediatype]['height'])) {
1864 $attachments[$mediatype] = ['type' => $mediatype, 'mediaType' => $mediatype, 'url' => $href, 'height' => $height, 'size' => null, 'name' => ''];
1865 } elseif ($mediatype == 'application/x-mpegURL') {
1866 // PeerTube exception, actual video link is in the tags of this URL element
1867 $attachments = array_merge($attachments, self::processAttachmentUrls($url['as:tag']));
1871 return array_values($attachments);
1875 * Fetches data from the object part of an activity
1877 * @param array $object
1879 * @return array|bool Object data or FALSE if $object does not contain @id element
1880 * @throws \Exception
1882 private static function processObject(array $object)
1884 if (!JsonLD::fetchElement($object, '@id')) {
1889 $object_data['object_type'] = JsonLD::fetchElement($object, '@type');
1890 $object_data['id'] = JsonLD::fetchElement($object, '@id');
1891 $object_data['reply-to-id'] = JsonLD::fetchElement($object, 'as:inReplyTo', '@id');
1893 // An empty "id" field is translated to "./" by the compactor, so we have to check for this content
1894 if (empty($object_data['reply-to-id']) || ($object_data['reply-to-id'] == './')) {
1895 $object_data['reply-to-id'] = $object_data['id'];
1897 // On activities the "reply to" is the id of the object it refers to
1898 if (in_array($object_data['object_type'], self::ACTIVITY_TYPES)) {
1899 $object_id = JsonLD::fetchElement($object, 'as:object', '@id');
1900 if (!empty($object_id)) {
1901 $object_data['reply-to-id'] = $object_id;
1905 // Some systems (e.g. GNU Social) don't reply to the "id" field but the "uri" field.
1906 $replyToId = Item::getURIByLink($object_data['reply-to-id']);
1907 if (!empty($replyToId) && ($object_data['reply-to-id'] != $replyToId)) {
1908 Logger::notice('Fix wrong reply-to', ['received' => $object_data['reply-to-id'], 'correct' => $replyToId]);
1909 $object_data['reply-to-id'] = $replyToId;
1913 $object_data['published'] = JsonLD::fetchElement($object, 'as:published', '@value');
1914 $object_data['updated'] = JsonLD::fetchElement($object, 'as:updated', '@value');
1916 if (empty($object_data['updated'])) {
1917 $object_data['updated'] = $object_data['published'];
1920 if (empty($object_data['published']) && !empty($object_data['updated'])) {
1921 $object_data['published'] = $object_data['updated'];
1924 $actor = JsonLD::fetchElement($object, 'as:attributedTo', '@id');
1925 if (empty($actor)) {
1926 $actor = JsonLD::fetchElement($object, 'as:actor', '@id');
1929 $location = JsonLD::fetchElement($object, 'as:location', 'as:name', '@type', 'as:Place');
1930 $location = JsonLD::fetchElement($location, 'location', '@value');
1932 // Some AP software allow formatted text in post location, so we run all the text converters we have to boil
1933 // down to HTML and then finally format to plaintext.
1934 $location = Markdown::convert($location);
1935 $location = BBCode::toPlaintext($location);
1938 $object_data['sc:identifier'] = JsonLD::fetchElement($object, 'sc:identifier', '@value');
1939 $object_data['diaspora:guid'] = JsonLD::fetchElement($object, 'diaspora:guid', '@value');
1940 $object_data['diaspora:comment'] = JsonLD::fetchElement($object, 'diaspora:comment', '@value');
1941 $object_data['diaspora:like'] = JsonLD::fetchElement($object, 'diaspora:like', '@value');
1942 $object_data['actor'] = $object_data['author'] = $actor;
1943 $element = JsonLD::fetchElement($object, 'as:context', '@id');
1944 $object_data['context'] = $element != './' ? $element : null;
1945 $element = JsonLD::fetchElement($object, 'ostatus:conversation', '@id');
1946 $object_data['conversation'] = $element != './' ? $element : null;
1947 $object_data['sensitive'] = JsonLD::fetchElement($object, 'as:sensitive');
1948 $object_data['name'] = JsonLD::fetchElement($object, 'as:name', '@value');
1949 $object_data['summary'] = JsonLD::fetchElement($object, 'as:summary', '@value');
1950 $object_data['content'] = JsonLD::fetchElement($object, 'as:content', '@value');
1951 $object_data['mediatype'] = JsonLD::fetchElement($object, 'as:mediaType', '@value');
1952 $object_data = self::getSource($object, $object_data);
1953 $object_data['start-time'] = JsonLD::fetchElement($object, 'as:startTime', '@value');
1954 $object_data['end-time'] = JsonLD::fetchElement($object, 'as:endTime', '@value');
1955 $object_data['location'] = $location;
1956 $object_data['latitude'] = JsonLD::fetchElement($object, 'as:location', 'as:latitude', '@type', 'as:Place');
1957 $object_data['latitude'] = JsonLD::fetchElement($object_data, 'latitude', '@value');
1958 $object_data['longitude'] = JsonLD::fetchElement($object, 'as:location', 'as:longitude', '@type', 'as:Place');
1959 $object_data['longitude'] = JsonLD::fetchElement($object_data, 'longitude', '@value');
1960 $object_data['attachments'] = self::processAttachments(JsonLD::fetchElementArray($object, 'as:attachment') ?? []);
1961 $object_data['tags'] = self::processTags(JsonLD::fetchElementArray($object, 'as:tag') ?? []);
1962 $object_data['emojis'] = self::processEmojis(JsonLD::fetchElementArray($object, 'as:tag', null, '@type', 'toot:Emoji') ?? []);
1963 $object_data['languages'] = self::processLanguages(JsonLD::fetchElementArray($object, 'sc:inLanguage') ?? []);
1964 $object_data['generator'] = JsonLD::fetchElement($object, 'as:generator', 'as:name', '@type', 'as:Application');
1965 $object_data['generator'] = JsonLD::fetchElement($object_data, 'generator', '@value');
1966 $object_data['alternate-url'] = JsonLD::fetchElement($object, 'as:url', '@id');
1968 // Special treatment for Hubzilla links
1969 if (is_array($object_data['alternate-url'])) {
1970 $object_data['alternate-url'] = JsonLD::fetchElement($object_data['alternate-url'], 'as:href', '@id');
1972 if (!is_string($object_data['alternate-url'])) {
1973 $object_data['alternate-url'] = JsonLD::fetchElement($object['as:url'], 'as:href', '@id');
1977 if (!empty($object_data['alternate-url']) && !Network::isValidHttpUrl($object_data['alternate-url'])) {
1978 $object_data['alternate-url'] = null;
1981 if (in_array($object_data['object_type'], ['as:Audio', 'as:Video'])) {
1982 $object_data['alternate-url'] = self::extractAlternateUrl($object['as:url'] ?? []) ?: $object_data['alternate-url'];
1983 $object_data['attachments'] = array_merge($object_data['attachments'], self::processAttachmentUrls($object['as:url'] ?? []));
1986 // Support for quoted posts (Pleroma, Fedibird and Misskey)
1987 $object_data['quote-url'] = JsonLD::fetchElement($object, 'as:quoteUrl', '@value');
1988 if (empty($object_data['quote-url'])) {
1989 $object_data['quote-url'] = JsonLD::fetchElement($object, 'fedibird:quoteUri', '@value');
1991 if (empty($object_data['quote-url'])) {
1992 $object_data['quote-url'] = JsonLD::fetchElement($object, 'misskey:_misskey_quote', '@value');
1995 // Misskey adds some data to the standard "content" value for quoted posts for backwards compatibility.
1996 // Their own "_misskey_content" value does then contain the content without this extra data.
1997 if (!empty($object_data['quote-url'])) {
1998 $misskey_content = JsonLD::fetchElement($object, 'misskey:_misskey_content', '@value');
1999 if (!empty($misskey_content)) {
2000 $object_data['content'] = $misskey_content;
2004 // For page types we expect that the alternate url posts to some page.
2005 // So we add this to the attachments if it differs from the id.
2006 // Currently only Lemmy is using the page type.
2007 if (($object_data['object_type'] == 'as:Page') && !empty($object_data['alternate-url']) && !Strings::compareLink($object_data['alternate-url'], $object_data['id'])) {
2008 $object_data['attachments'][] = ['url' => $object_data['alternate-url']];
2009 $object_data['alternate-url'] = null;
2012 if ($object_data['object_type'] == 'as:Question') {
2013 $object_data['question'] = self::processQuestion($object);
2016 $receiverdata = self::getReceivers($object, $object_data['actor'] ?? '', $object_data['tags'], true, false);
2017 $receivers = $reception_types = [];
2018 foreach ($receiverdata as $key => $data) {
2019 $receivers[$key] = $data['uid'];
2020 $reception_types[$data['uid']] = $data['type'] ?? 0;
2023 $object_data['receiver_urls'] = self::getReceiverURL($object);
2024 $object_data['receiver'] = $receivers;
2025 $object_data['reception_type'] = $reception_types;
2027 $object_data['unlisted'] = in_array(-1, $object_data['receiver']);
2028 unset($object_data['receiver'][-1]);
2029 unset($object_data['reception_type'][-1]);
2031 return $object_data;
2035 * Add an object id to the list of arrived activities
2041 private static function addArrivedId(string $id)
2043 DBA::delete('arrived-activity', ["`received` < ?", DateTimeFormat::utc('now - 5 minutes')]);
2044 DBA::insert('arrived-activity', ['object-id' => $id, 'received' => DateTimeFormat::utcNow()], Database::INSERT_IGNORE);
2048 * Checks if the given object already arrived before
2054 private static function hasArrived(string $id): bool
2056 return DBA::exists('arrived-activity', ['object-id' => $id]);