3 * @copyright Copyright (C) 2010-2022, 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'];
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');
318 if (!empty($id) && !$trust_source) {
319 $fetch_uid = $uid ?: self::getBestUserForActivity($activity);
321 $fetched_activity = Processor::fetchCachedActivity($fetch_id, $fetch_uid);
322 if (!empty($fetched_activity)) {
323 $object = JsonLD::compact($fetched_activity);
325 $fetched_id = JsonLD::fetchElement($object, '@id');
326 $fetched_type = JsonLD::fetchElement($object, '@type');
328 if (($fetched_id == $id) && !empty($fetched_type) && ($fetched_type == $type)) {
329 Logger::info('Activity had been fetched successfully', ['id' => $id]);
330 $trust_source = true;
332 } elseif (($fetched_id == $object_id) && !empty($fetched_type) && ($fetched_type == $object_type)) {
333 Logger::info('Fetched data is the object instead of the activity', ['id' => $id]);
334 $trust_source = true;
335 unset($object['@context']);
336 $activity['as:object'] = $object;
338 Logger::info('Activity id is not equal', ['id' => $id, 'fetched' => $fetched_id]);
341 Logger::info('Activity could not been fetched', ['id' => $id]);
345 $actor = JsonLD::fetchElement($activity, 'as:actor', '@id');
347 Logger::info('Empty actor', ['activity' => $activity]);
351 $type = JsonLD::fetchElement($activity, '@type');
353 // Fetch all receivers from to, cc, bto and bcc
354 $receiverdata = self::getReceivers($activity, $actor);
355 $receivers = $reception_types = [];
356 foreach ($receiverdata as $key => $data) {
357 $receivers[$key] = $data['uid'];
358 $reception_types[$data['uid']] = $data['type'] ?? self::TARGET_UNKNOWN;
361 $urls = self::getReceiverURL($activity);
363 // When it is a delivery to a personal inbox we add that user to the receivers
365 $additional = [$uid => $uid];
366 $receivers = array_replace($receivers, $additional);
367 if (empty($activity['thread-completion']) && (empty($reception_types[$uid]) || in_array($reception_types[$uid], [self::TARGET_UNKNOWN, self::TARGET_FOLLOWER, self::TARGET_ANSWER, self::TARGET_GLOBAL]))) {
368 $reception_types[$uid] = self::TARGET_BCC;
369 $owner = User::getOwnerDataById($uid);
370 if (!empty($owner['url'])) {
371 $urls['as:bcc'][] = $owner['url'];
376 // We possibly need some user to fetch private content,
377 // so we fetch one out of the receivers if no uid is provided.
378 $fetch_uid = $uid ?: self::getBestUserForActivity($activity);
380 $object_id = JsonLD::fetchElement($activity, 'as:object', '@id');
381 if (empty($object_id)) {
382 Logger::info('No object found');
386 if (!is_string($object_id)) {
387 Logger::info('Invalid object id', ['object' => $object_id]);
391 $object_type = self::fetchObjectType($activity, $object_id, $fetch_uid);
393 // Fetch the activity on Lemmy "Announce" messages (announces of activities)
394 if (($type == 'as:Announce') && in_array($object_type, array_merge(self::ACTIVITY_TYPES, ['as:Delete', 'as:Undo', 'as:Update']))) {
395 Logger::debug('Fetch announced activity', ['object' => $object_id]);
396 $data = Processor::fetchCachedActivity($object_id, $fetch_uid);
398 $type = $object_type;
399 $activity = JsonLD::compact($data);
401 // Some variables need to be refetched since the activity changed
402 $actor = JsonLD::fetchElement($activity, 'as:actor', '@id');
403 $object_id = JsonLD::fetchElement($activity, 'as:object', '@id');
404 $object_type = self::fetchObjectType($activity, $object_id, $fetch_uid);
408 // Any activities on account types must not be altered
409 if (in_array($object_type, self::ACCOUNT_TYPES)) {
411 $object_data['id'] = JsonLD::fetchElement($activity, '@id');
412 $object_data['object_id'] = JsonLD::fetchElement($activity, 'as:object', '@id');
413 $object_data['object_actor'] = JsonLD::fetchElement($activity['as:object'], 'as:actor', '@id');
414 $object_data['object_object'] = JsonLD::fetchElement($activity['as:object'], 'as:object');
415 $object_data['object_type'] = JsonLD::fetchElement($activity['as:object'], '@type');
416 $object_data['push'] = $push;
417 if (!$trust_source && ($type == 'as:Delete')) {
418 $apcontact = APContact::getByURL($object_data['object_id'], true);
419 $trust_source = empty($apcontact) || ($apcontact['type'] == 'Tombstone') || $apcontact['suspended'];
421 } elseif (in_array($type, ['as:Create', 'as:Update', 'as:Announce', 'as:Invite']) || strpos($type, '#emojiReaction')) {
422 // Fetch the content only on activities where this matters
423 // We can receive "#emojiReaction" when fetching content from Hubzilla systems
424 // Always fetch on "Announce"
425 $object_data = self::fetchObject($object_id, $activity['as:object'], $trust_source && ($type != 'as:Announce'), $fetch_uid);
426 if (empty($object_data)) {
427 Logger::info("Object data couldn't be processed");
431 $object_data['object_id'] = $object_id;
433 if ($type == 'as:Announce') {
434 $object_data['push'] = false;
436 $object_data['push'] = $push;
439 // Test if it is an answer to a mail
440 if (DBA::exists('mail', ['uri' => $object_data['reply-to-id']])) {
441 $object_data['directmessage'] = true;
443 $object_data['directmessage'] = JsonLD::fetchElement($activity, 'litepub:directMessage');
445 } elseif (in_array($type, array_merge(self::ACTIVITY_TYPES, ['as:Follow', 'litepub:EmojiReact', 'as:View'])) && in_array($object_type, self::CONTENT_TYPES)) {
446 // Create a mostly empty array out of the activity data (instead of the object).
447 // This way we later don't have to check for the existence of each individual array element.
448 $object_data = self::processObject($activity);
449 $object_data['name'] = $type;
450 $object_data['author'] = JsonLD::fetchElement($activity, 'as:actor', '@id');
451 $object_data['object_id'] = $object_id;
452 $object_data['object_type'] = ''; // Since we don't fetch the object, we don't know the type
453 $object_data['push'] = $push;
454 } elseif (in_array($type, ['as:Add', 'as:Remove'])) {
456 $object_data['id'] = JsonLD::fetchElement($activity, '@id');
457 $object_data['target_id'] = JsonLD::fetchElement($activity, 'as:target', '@id');
458 $object_data['object_id'] = JsonLD::fetchElement($activity, 'as:object', '@id');
459 $object_data['object_type'] = JsonLD::fetchElement($activity['as:object'], '@type');
460 $object_data['object_content'] = JsonLD::fetchElement($activity['as:object'], 'as:content', '@type');
461 $object_data['push'] = $push;
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');
469 $object_data['push'] = $push;
471 // An Undo is done on the object of an object, so we need that type as well
472 if (($type == 'as:Undo') && !empty($object_data['object_object'])) {
473 $object_data['object_object_type'] = self::fetchObjectType([], $object_data['object_object'], $fetch_uid);
476 if (!$trust_source && ($type == 'as:Delete') && in_array($object_data['object_type'], array_merge(['as:Tombstone', ''], self::CONTENT_TYPES))) {
477 $trust_source = Processor::isActivityGone($object_data['object_id']);
478 if (!$trust_source) {
479 $trust_source = !empty(APContact::getByURL($object_data['object_id'], false));
484 $object_data = self::addActivityFields($object_data, $activity);
486 if (empty($object_data['object_type'])) {
487 $object_data['object_type'] = $object_type;
490 foreach (['as:to', 'as:cc', 'as:bto', 'as:bcc'] as $element) {
491 if ((empty($object_data['receiver_urls'][$element]) || in_array($element, ['as:bto', 'as:bcc'])) && !empty($urls[$element])) {
492 $object_data['receiver_urls'][$element] = array_unique(array_merge($object_data['receiver_urls'][$element] ?? [], $urls[$element]));
496 $object_data['type'] = $type;
497 $object_data['actor'] = $actor;
498 $object_data['item_receiver'] = $receivers;
499 $object_data['receiver'] = array_replace($object_data['receiver'] ?? [], $receivers);
500 $object_data['reception_type'] = array_replace($object_data['reception_type'] ?? [], $reception_types);
502 // This check here interferes with Hubzilla posts where the author host differs from the host the post was created
503 // $author = $object_data['author'] ?? $actor;
504 // if (!empty($author) && !empty($object_data['id'])) {
505 // $author_host = parse_url($author, PHP_URL_HOST);
506 // $id_host = parse_url($object_data['id'], PHP_URL_HOST);
507 // if ($author_host == $id_host) {
508 // Logger::info('Valid hosts', ['type' => $type, 'host' => $id_host]);
510 // Logger::notice('Differing hosts on author and id', ['type' => $type, 'author' => $author_host, 'id' => $id_host]);
511 // $trust_source = false;
515 $account = Contact::selectFirstAccount(['platform'], ['nurl' => Strings::normaliseLink($actor)]);
516 $platform = $account['platform'] ?? '';
518 Logger::info('Processing', ['type' => $object_data['type'], 'object_type' => $object_data['object_type'], 'id' => $object_data['id'], 'actor' => $actor, 'platform' => $platform]);
524 * Fetches the first user id from the receiver array
526 * @param array $receivers Array with receivers
527 * @return integer user id;
529 public static function getFirstUserFromReceivers(array $receivers): int
531 foreach ($receivers as $receiver) {
532 if (!empty($receiver)) {
540 * Processes the activity object
542 * @param array $activity Array with activity data
543 * @param string $body The unprocessed body
544 * @param int|null $uid User ID
545 * @param boolean $trust_source Do we trust the source?
546 * @param boolean $push Message had been pushed to our system
547 * @param array $signer The signer of the post
551 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
552 * @throws \ImagickException
554 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
556 $type = JsonLD::fetchElement($activity, '@type');
558 Logger::info('Empty type', ['activity' => $activity]);
562 if ($type == 'as:View') {
563 Logger::info('View activities are ignored.', ['signer' => $signer, 'http_signer' => $http_signer]);
567 if (!JsonLD::fetchElement($activity, 'as:object', '@id')) {
568 Logger::info('Empty object', ['activity' => $activity]);
572 $actor = JsonLD::fetchElement($activity, 'as:actor', '@id');
574 Logger::info('Empty actor', ['activity' => $activity]);
578 if (is_array($activity['as:object'])) {
579 $attributed_to = JsonLD::fetchElement($activity['as:object'], 'as:attributedTo', '@id');
584 // Test the provided signatures against the actor and "attributedTo"
586 if (!empty($attributed_to) && !empty($actor)) {
587 $trust_source = (in_array($actor, $signer) && in_array($attributed_to, $signer));
589 $trust_source = in_array($actor, $signer);
593 // $trust_source is called by reference and is set to true if the content was retrieved successfully
594 $object_data = self::prepareObjectData($activity, $uid, $push, $trust_source);
595 if (empty($object_data)) {
596 Logger::info('No object data found', ['activity' => $activity]);
600 // Lemmy is announcing activities.
601 // We are changing the announces into regular activities.
602 if (($type == 'as:Announce') && in_array($object_data['type'] ?? '', array_merge(self::ACTIVITY_TYPES, ['as:Delete', 'as:Undo', 'as:Update']))) {
603 Logger::debug('Change type of announce to activity', ['type' => $object_data['type']]);
604 $type = $object_data['type'];
607 if (!empty($body) && empty($object_data['raw'])) {
608 $object_data['raw'] = $body;
611 // Internal flag for thread completion. See Processor.php
612 if (!empty($activity['thread-completion'])) {
613 $object_data['thread-completion'] = $activity['thread-completion'];
616 if (!empty($activity['completion-mode'])) {
617 $object_data['completion-mode'] = $activity['completion-mode'];
620 if (!empty($activity['thread-children-type'])) {
621 $object_data['thread-children-type'] = $activity['thread-children-type'];
624 // Internal flag for posts that arrived via relay
625 if (!empty($activity['from-relay'])) {
626 $object_data['from-relay'] = $activity['from-relay'];
629 if ($type == 'as:Announce') {
630 $object_data['object_activity'] = $activity;
633 if (($type == 'as:Create') && $trust_source) {
634 if (self::hasArrived($object_data['object_id'])) {
635 Logger::info('The activity already arrived.', ['id' => $object_data['object_id']]);
638 self::addArrivedId($object_data['object_id']);
640 if (Queue::exists($object_data['object_id'], $type)) {
641 Logger::info('The activity is already added.', ['id' => $object_data['object_id']]);
646 if (DI::config()->get('system', 'decoupled_receiver') && ($trust_source || DI::config()->get('debug', 'ap_inbox_store_untrusted'))) {
647 $object_data = Queue::add($object_data, $type, $uid, $http_signer, $push, $trust_source);
650 if (!$trust_source) {
651 Logger::info('Activity trust could not be achieved.', ['id' => $object_data['object_id'], 'type' => $type, 'signer' => $signer, 'actor' => $actor, 'attributedTo' => $attributed_to]);
655 if (!empty($object_data['entry-id']) && DI::config()->get('system', 'decoupled_receiver') && ($push || ($completion == self::COMPLETION_RELAY))) {
656 if (Queue::isProcessable($object_data['entry-id'])) {
657 // We delay by 5 seconds to allow to accumulate all receivers
658 $delayed = date(DateTimeFormat::MYSQL, time() + 5);
659 Logger::debug('Initiate processing', ['id' => $object_data['entry-id'], 'uri' => $object_data['object_id']]);
660 $wid = Worker::add(['priority' => Worker::PRIORITY_HIGH, 'delayed' => $delayed], 'ProcessQueue', $object_data['entry-id']);
661 Queue::setWorkerId($object_data['entry-id'], $wid);
663 Logger::debug('Other queue entries need to be processed first.', ['id' => $object_data['entry-id']]);
668 if (!empty($activity['recursion-depth'])) {
669 $object_data['recursion-depth'] = $activity['recursion-depth'];
672 if (in_array('as:Question', [$object_data['object_type'] ?? '', $object_data['object_object_type'] ?? ''])) {
673 self::storeUnhandledActivity(false, $type, $object_data, $activity, $body, $uid, $trust_source, $push, $signer);
676 if (!self::routeActivities($object_data, $type, $push)) {
677 self::storeUnhandledActivity(true, $type, $object_data, $activity, $body, $uid, $trust_source, $push, $signer);
678 Queue::remove($object_data);
686 * @param array $object_data
687 * @param string $type
689 * @param bool $fetch_parents
691 * @return boolean Could the activity be routed?
693 public static function routeActivities(array $object_data, string $type, bool $push, bool $fetch_parents = true): bool
695 $activity = $object_data['object_activity'] ?? [];
699 if (in_array($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($object_data);
711 if (in_array($object_data['object_type'], ['as:Event'])) {
712 $item = ActivityPub\Processor::createItem($object_data, $fetch_parents);
713 ActivityPub\Processor::postItem($object_data, $item);
720 if ($object_data['object_type'] == 'as:tag') {
721 ActivityPub\Processor::addTag($object_data);
722 } elseif (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
723 ActivityPub\Processor::addToFeaturedCollection($object_data);
724 } elseif ($object_data['object_type'] == '') {
725 // The object type couldn't be determined. We don't have it and we can't fetch it. We ignore this activity.
726 Queue::remove($object_data);
733 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
734 $actor = JsonLD::fetchElement($activity, 'as:actor', '@id');
735 $object_data['thread-completion'] = Contact::getIdForURL($actor);
736 $object_data['completion-mode'] = self::COMPLETION_ANNOUCE;
738 if (!Post::exists(['uri' => $object_data['id'], 'uid' => 0])) {
739 $item = ActivityPub\Processor::createItem($object_data, $fetch_parents);
741 Logger::debug('announced id was not created', ['id' => $object_data['id']]);
745 $item['post-reason'] = Item::PR_ANNOUNCEMENT;
746 ActivityPub\Processor::postItem($object_data, $item);
747 Logger::debug('Created announced id', ['id' => $object_data['id']]);
749 Logger::info('Announced id already exists', ['id' => $object_data['id']]);
750 Queue::remove($object_data);
753 if (!empty($activity)) {
754 $announce_object_data = self::processObject($activity);
755 $announce_object_data['name'] = $type;
756 $announce_object_data['author'] = $actor;
757 $announce_object_data['object_id'] = $object_data['id'];
758 $announce_object_data['object_type'] = $object_data['object_type'];
759 $announce_object_data['push'] = $push;
760 Logger::debug('Create announce activity', ['id' => $announce_object_data['id'], 'object_data' => $announce_object_data]);
762 if (!empty($object_data['raw'])) {
763 $announce_object_data['raw'] = $object_data['raw'];
765 if (!empty($object_data['raw-object'])) {
766 $announce_object_data['raw-object'] = $object_data['raw-object'];
768 ActivityPub\Processor::createActivity($announce_object_data, Activity::ANNOUNCE);
776 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
777 ActivityPub\Processor::createActivity($object_data, Activity::LIKE);
778 } elseif ($object_data['object_type'] == '') {
779 // The object type couldn't be determined. We don't have it and we can't fetch it. We ignore this activity.
780 Queue::remove($object_data);
787 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
788 ActivityPub\Processor::createActivity($object_data, Activity::DISLIKE);
789 } elseif ($object_data['object_type'] == '') {
790 // The object type couldn't be determined. We don't have it and we can't fetch it. We ignore this activity.
791 Queue::remove($object_data);
797 case 'as:TentativeAccept':
798 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
799 ActivityPub\Processor::createActivity($object_data, Activity::ATTENDMAYBE);
806 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
807 ActivityPub\Processor::updateItem($object_data);
808 } elseif (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
809 ActivityPub\Processor::updatePerson($object_data);
810 } elseif (in_array($object_data['object_type'], ['pt:CacheFile'])) {
811 // Unhandled Peertube activity
812 Queue::remove($object_data);
819 if (in_array($object_data['object_type'], array_merge(['as:Tombstone'], self::CONTENT_TYPES))) {
820 ActivityPub\Processor::deleteItem($object_data);
821 } elseif (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
822 ActivityPub\Processor::deletePerson($object_data);
823 } elseif ($object_data['object_type'] == '') {
824 // The object type couldn't be determined. Most likely we don't have it here. We ignore this activity.
825 Queue::remove($object_data);
832 if (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
833 ActivityPub\Processor::blockAccount($object_data);
840 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
841 ActivityPub\Processor::removeFromFeaturedCollection($object_data);
842 } elseif ($object_data['object_type'] == '') {
843 // The object type couldn't be determined. We don't have it and we can't fetch it. We ignore this activity.
844 Queue::remove($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($object_data, Activity::ATTEND);
876 if ($object_data['object_type'] == 'as:Follow') {
877 ActivityPub\Processor::rejectFollowUser($object_data);
878 } elseif (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
879 ActivityPub\Processor::createActivity($object_data, Activity::ATTENDNO);
886 if (($object_data['object_type'] == 'as:Follow') &&
887 in_array($object_data['object_object_type'], self::ACCOUNT_TYPES)) {
888 ActivityPub\Processor::undoFollowUser($object_data);
889 } elseif (($object_data['object_type'] == 'as:Follow') &&
890 in_array($object_data['object_object_type'], self::CONTENT_TYPES)) {
891 ActivityPub\Processor::undoActivity($object_data);
892 } elseif (($object_data['object_type'] == 'as:Accept') &&
893 in_array($object_data['object_object_type'], self::ACCOUNT_TYPES)) {
894 ActivityPub\Processor::rejectFollowUser($object_data);
895 } elseif (($object_data['object_type'] == 'as:Block') &&
896 in_array($object_data['object_object_type'], self::ACCOUNT_TYPES)) {
897 ActivityPub\Processor::unblockAccount($object_data);
898 } elseif (in_array($object_data['object_type'], array_merge(self::ACTIVITY_TYPES, ['as:Announce', 'as:Create', ''])) &&
899 empty($object_data['object_object_type'])) {
900 // We cannot detect the target object. So we can ignore it.
901 Queue::remove($object_data);
902 } elseif (in_array($object_data['object_type'], array_merge(self::ACTIVITY_TYPES, ['as:Announce'])) &&
903 in_array($object_data['object_object_type'], array_merge(['as:Tombstone'], self::CONTENT_TYPES))) {
904 ActivityPub\Processor::undoActivity($object_data);
905 } elseif (in_array($object_data['object_type'], ['as:Create']) &&
906 in_array($object_data['object_object_type'], ['pt:CacheFile'])) {
907 // Unhandled Peertube activity
908 Queue::remove($object_data);
915 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
916 ActivityPub\Processor::createActivity($object_data, Activity::VIEW);
917 } elseif ($object_data['object_type'] == '') {
918 // The object type couldn't be determined. Most likely we don't have it here. We ignore this activity.
919 Queue::remove($object_data);
925 case 'litepub:EmojiReact':
926 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
927 ActivityPub\Processor::createActivity($object_data, Activity::EMOJIREACT);
928 } elseif ($object_data['object_type'] == '') {
929 // The object type couldn't be determined. We don't have it and we can't fetch it. We ignore this activity.
930 Queue::remove($object_data);
937 Logger::info('Unknown activity: ' . $type . ' ' . $object_data['object_type']);
944 * Stores unhandled or unknown Activities as a file
946 * @param boolean $unknown "true" if the activity is unknown, "false" if it is unhandled
947 * @param string $type Activity type
948 * @param array $object_data Preprocessed array that is generated out of the received activity
949 * @param array $activity Array with activity data
950 * @param string $body The unprocessed body
951 * @param integer $uid User ID
952 * @param boolean $trust_source Do we trust the source?
953 * @param boolean $push Message had been pushed to our system
954 * @param array $signer The signer of the post
957 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 = [])
959 if (!DI::config()->get('debug', 'ap_log_unknown')) {
963 $file = ($unknown ? 'unknown-' : 'unhandled-') . str_replace(':', '-', $type) . '-';
965 if (!empty($object_data['object_type'])) {
966 $file .= str_replace(':', '-', $object_data['object_type']) . '-';
969 if (!empty($object_data['object_object_type'])) {
970 $file .= str_replace(':', '-', $object_data['object_object_type']) . '-';
973 $tempfile = tempnam(System::getTempPath(), $file);
974 file_put_contents($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));
975 Logger::notice('Unknown activity stored', ['type' => $type, 'object_type' => $object_data['object_type'], $object_data['object_object_type'] ?? '', 'file' => $tempfile]);
979 * Fetch a user id from an activity array
981 * @param array $activity
982 * @param string $actor
984 * @return int user id
986 public static function getBestUserForActivity(array $activity): int
989 $actor = JsonLD::fetchElement($activity, 'as:actor', '@id') ?? '';
991 $receivers = self::getReceivers($activity, $actor);
992 foreach ($receivers as $receiver) {
993 if ($receiver['type'] == self::TARGET_GLOBAL) {
996 if (empty($uid) || ($receiver['type'] == self::TARGET_TO)) {
997 $uid = $receiver['uid'];
1001 // When we haven't found any user yet, we just chose a user who most likely could have access to the content
1003 $contact = Contact::selectFirst(['uid'], ['nurl' => Strings::normaliseLink($actor), 'rel' => [Contact::SHARING, Contact::FRIEND]]);
1004 if (!empty($contact['uid'])) {
1005 $uid = $contact['uid'];
1012 // @TODO Missing documentation
1013 public static function getReceiverURL(array $activity): array
1017 foreach (['as:to', 'as:cc', 'as:bto', 'as:bcc'] as $element) {
1018 $receiver_list = JsonLD::fetchElementArray($activity, $element, '@id');
1019 if (empty($receiver_list)) {
1023 foreach ($receiver_list as $receiver) {
1024 if ($receiver == self::PUBLIC_COLLECTION) {
1025 $receiver = ActivityPub::PUBLIC_COLLECTION;
1027 $urls[$element][] = $receiver;
1035 * Fetch the receiver list from an activity array
1037 * @param array $activity
1038 * @param string $actor
1039 * @param array $tags
1040 * @param boolean $fetch_unlisted
1042 * @return array with receivers (user id)
1043 * @throws \Exception
1045 private static function getReceivers(array $activity, string $actor, array $tags = [], bool $fetch_unlisted = false): array
1047 $reply = $receivers = $profile = [];
1049 // When it is an answer, we inherite the receivers from the parent
1050 $replyto = JsonLD::fetchElement($activity, 'as:inReplyTo', '@id');
1051 if (!empty($replyto)) {
1052 $reply = [$replyto];
1054 // Fix possibly wrong item URI (could be an answer to a plink uri)
1055 $fixedReplyTo = Item::getURIByLink($replyto);
1056 if (!empty($fixedReplyTo)) {
1057 $reply[] = $fixedReplyTo;
1061 // Fetch all posts that refer to the object id
1062 $object_id = JsonLD::fetchElement($activity, 'as:object', '@id');
1063 if (!empty($object_id)) {
1064 $reply[] = $object_id;
1067 if (!empty($reply)) {
1068 $parents = Post::select(['uid'], DBA::mergeConditions(['uri' => $reply], ["`uid` != ?", 0]));
1069 while ($parent = Post::fetch($parents)) {
1070 $receivers[$parent['uid']] = ['uid' => $parent['uid'], 'type' => self::TARGET_ANSWER];
1072 DBA::close($parents);
1075 if (!empty($actor)) {
1076 $profile = APContact::getByURL($actor);
1077 $followers = $profile['followers'] ?? '';
1078 $is_forum = ($actor['type'] ?? '') == 'Group';
1079 Logger::info('Got actor and followers', ['actor' => $actor, 'followers' => $followers]);
1081 Logger::info('Empty actor', ['activity' => $activity]);
1086 // We have to prevent false follower assumptions upon thread completions
1087 $follower_target = empty($activity['thread-completion']) ? self::TARGET_FOLLOWER : self::TARGET_UNKNOWN;
1089 foreach (['as:to', 'as:cc', 'as:bto', 'as:bcc'] as $element) {
1090 $receiver_list = JsonLD::fetchElementArray($activity, $element, '@id');
1091 if (empty($receiver_list)) {
1095 foreach ($receiver_list as $receiver) {
1096 if ($receiver == self::PUBLIC_COLLECTION) {
1097 $receivers[0] = ['uid' => 0, 'type' => self::TARGET_GLOBAL];
1100 // Add receiver "-1" for unlisted posts
1101 if ($fetch_unlisted && ($receiver == self::PUBLIC_COLLECTION) && ($element == 'as:cc')) {
1102 $receivers[-1] = ['uid' => -1, 'type' => self::TARGET_GLOBAL];
1105 // Fetch the receivers for the public and the followers collection
1106 if ((($receiver == $followers) || (($receiver == self::PUBLIC_COLLECTION) && !$is_forum)) && !empty($actor)) {
1107 $receivers = self::getReceiverForActor($actor, $tags, $receivers, $follower_target, $profile);
1111 // Fetching all directly addressed receivers
1112 $condition = ['self' => true, 'nurl' => Strings::normaliseLink($receiver)];
1113 $contact = DBA::selectFirst('contact', ['uid', 'contact-type'], $condition);
1114 if (!DBA::isResult($contact)) {
1118 // Check if the potential receiver is following the actor
1119 // Exception: The receiver is targetted via "to" or this is a comment
1120 if ((($element != 'as:to') && empty($replyto)) || ($contact['contact-type'] == Contact::TYPE_COMMUNITY)) {
1121 $networks = Protocol::FEDERATED;
1122 $condition = ['nurl' => Strings::normaliseLink($actor), 'rel' => [Contact::SHARING, Contact::FRIEND],
1123 'network' => $networks, 'archive' => false, 'pending' => false, 'uid' => $contact['uid']];
1125 // Forum posts are only accepted from forum contacts
1126 if ($contact['contact-type'] == Contact::TYPE_COMMUNITY) {
1127 $condition['rel'] = [Contact::SHARING, Contact::FRIEND, Contact::FOLLOWER];
1130 if (!DBA::exists('contact', $condition)) {
1135 $type = $receivers[$contact['uid']]['type'] ?? self::TARGET_UNKNOWN;
1136 if (in_array($type, [self::TARGET_UNKNOWN, self::TARGET_FOLLOWER, self::TARGET_ANSWER, self::TARGET_GLOBAL])) {
1139 $type = self::TARGET_TO;
1142 $type = self::TARGET_CC;
1145 $type = self::TARGET_BTO;
1148 $type = self::TARGET_BCC;
1152 $receivers[$contact['uid']] = ['uid' => $contact['uid'], 'type' => $type];
1157 self::switchContacts($receivers, $actor);
1159 // "birdsitelive" is a service that mirrors tweets into the fediverse
1160 // These posts can be fetched without authentification, but are not marked as public
1161 // We treat them as unlisted posts to be able to handle them.
1162 if (empty($receivers) && $fetch_unlisted && Contact::isPlatform($actor, 'birdsitelive')) {
1163 $receivers[0] = ['uid' => 0, 'type' => self::TARGET_GLOBAL];
1164 $receivers[-1] = ['uid' => -1, 'type' => self::TARGET_GLOBAL];
1165 Logger::notice('Post from "birdsitelive" is set to "unlisted"', ['id' => JsonLD::fetchElement($activity, '@id')]);
1166 } elseif (empty($receivers)) {
1167 Logger::notice('Post has got no receivers', ['fetch_unlisted' => $fetch_unlisted, 'actor' => $actor, 'id' => JsonLD::fetchElement($activity, '@id'), 'type' => JsonLD::fetchElement($activity, '@type')]);
1174 * Fetch the receiver list of a given actor
1176 * @param string $actor
1177 * @param array $tags
1178 * @param array $receivers
1179 * @param integer $target_type
1180 * @param array $profile
1182 * @return array with receivers (user id)
1183 * @throws \Exception
1185 private static function getReceiverForActor(string $actor, array $tags, array $receivers, int $target_type, array $profile): array
1187 $basecondition = ['rel' => [Contact::SHARING, Contact::FRIEND, Contact::FOLLOWER],
1188 'network' => Protocol::FEDERATED, 'archive' => false, 'pending' => false];
1190 if (!empty($profile['uri-id'])) {
1191 $condition = DBA::mergeConditions($basecondition, ["`uri-id` = ? AND `uid` != ?", $profile['uri-id'], 0]);
1192 $contacts = DBA::select('contact', ['uid', 'rel'], $condition);
1193 while ($contact = DBA::fetch($contacts)) {
1194 if (empty($receivers[$contact['uid']]) && self::isValidReceiverForActor($contact, $tags)) {
1195 $receivers[$contact['uid']] = ['uid' => $contact['uid'], 'type' => $target_type];
1198 DBA::close($contacts);
1200 // This part will only be called while post update 1426 wasn't finished
1201 $condition = DBA::mergeConditions($basecondition, ["`nurl` = ? AND `uid` != ?", Strings::normaliseLink($actor), 0]);
1202 $contacts = DBA::select('contact', ['uid', 'rel'], $condition);
1203 while ($contact = DBA::fetch($contacts)) {
1204 if (empty($receivers[$contact['uid']]) && self::isValidReceiverForActor($contact, $tags)) {
1205 $receivers[$contact['uid']] = ['uid' => $contact['uid'], 'type' => $target_type];
1208 DBA::close($contacts);
1210 // The queries are split because of performance issues
1211 $condition = DBA::mergeConditions($basecondition, ["`alias` IN (?, ?) AND `uid` != ?", Strings::normaliseLink($actor), $actor, 0]);
1212 $contacts = DBA::select('contact', ['uid', 'rel'], $condition);
1213 while ($contact = DBA::fetch($contacts)) {
1214 if (empty($receivers[$contact['uid']]) && self::isValidReceiverForActor($contact, $tags)) {
1215 $receivers[$contact['uid']] = ['uid' => $contact['uid'], 'type' => $target_type];
1218 DBA::close($contacts);
1224 * Tests if the contact is a valid receiver for this actor
1226 * @param array $contact
1227 * @param array $tags
1229 * @return bool with receivers (user id)
1230 * @throws \Exception
1232 private static function isValidReceiverForActor(array $contact, array $tags): bool
1234 // Are we following the contact? Then this is a valid receiver
1235 if (in_array($contact['rel'], [Contact::SHARING, Contact::FRIEND])) {
1239 // When the possible receiver isn't a community, then it is no valid receiver
1240 $owner = User::getOwnerDataById($contact['uid']);
1241 if (empty($owner) || ($owner['contact-type'] != Contact::TYPE_COMMUNITY)) {
1245 // Is the community account tagged?
1246 foreach ($tags as $tag) {
1247 if ($tag['type'] != 'Mention') {
1251 if (Strings::compareLink($tag['href'], $owner['url'])) {
1260 * Switches existing contacts to ActivityPub
1262 * @param integer $cid Contact ID
1263 * @param integer $uid User ID
1264 * @param string $url Profile URL
1266 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1267 * @throws \ImagickException
1269 public static function switchContact(int $cid, int $uid, string $url)
1271 if (DBA::exists('contact', ['id' => $cid, 'network' => Protocol::ACTIVITYPUB])) {
1272 Logger::info('Contact is already ActivityPub', ['id' => $cid, 'uid' => $uid, 'url' => $url]);
1276 if (Contact::updateFromProbe($cid)) {
1277 Logger::info('Update was successful', ['id' => $cid, 'uid' => $uid, 'url' => $url]);
1280 // Send a new follow request to be sure that the connection still exists
1281 if (($uid != 0) && DBA::exists('contact', ['id' => $cid, 'rel' => [Contact::SHARING, Contact::FRIEND], 'network' => Protocol::ACTIVITYPUB])) {
1282 Logger::info('Contact had been switched to ActivityPub. Sending a new follow request.', ['uid' => $uid, 'url' => $url]);
1283 ActivityPub\Transmitter::sendActivity('Follow', $url, $uid);
1288 * @TODO Fix documentation and type-hints
1293 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1294 * @throws \ImagickException
1296 private static function switchContacts($receivers, $actor)
1298 if (empty($actor)) {
1302 foreach ($receivers as $receiver) {
1303 $contact = DBA::selectFirst('contact', ['id'], ['uid' => $receiver['uid'], 'network' => Protocol::OSTATUS, 'nurl' => Strings::normaliseLink($actor)]);
1304 if (DBA::isResult($contact)) {
1305 self::switchContact($contact['id'], $receiver['uid'], $actor);
1308 $contact = DBA::selectFirst('contact', ['id'], ['uid' => $receiver['uid'], 'network' => Protocol::OSTATUS, 'alias' => [Strings::normaliseLink($actor), $actor]]);
1309 if (DBA::isResult($contact)) {
1310 self::switchContact($contact['id'], $receiver['uid'], $actor);
1316 * @TODO Fix documentation and type-hints
1318 * @param $object_data
1319 * @param array $activity
1323 private static function addActivityFields($object_data, array $activity)
1325 if (!empty($activity['published']) && empty($object_data['published'])) {
1326 $object_data['published'] = JsonLD::fetchElement($activity, 'as:published', '@value');
1329 if (!empty($activity['diaspora:guid']) && empty($object_data['diaspora:guid'])) {
1330 $object_data['diaspora:guid'] = JsonLD::fetchElement($activity, 'diaspora:guid', '@value');
1333 $object_data['service'] = JsonLD::fetchElement($activity, 'as:instrument', 'as:name', '@type', 'as:Service');
1334 $object_data['service'] = JsonLD::fetchElement($object_data, 'service', '@value');
1336 if (!empty($object_data['object_id'])) {
1337 // Some systems (e.g. GNU Social) don't reply to the "id" field but the "uri" field.
1338 $objectId = Item::getURIByLink($object_data['object_id']);
1339 if (!empty($objectId) && ($object_data['object_id'] != $objectId)) {
1340 Logger::notice('Fix wrong object-id', ['received' => $object_data['object_id'], 'correct' => $objectId]);
1341 $object_data['object_id'] = $objectId;
1345 return $object_data;
1349 * Fetches the object data from external ressources if needed
1351 * @param string $object_id Object ID of the the provided object
1352 * @param array $object The provided object array
1353 * @param boolean $trust_source Do we trust the provided object?
1354 * @param integer $uid User ID for the signature that we use to fetch data
1356 * @return array|false with trusted and valid object data
1357 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1358 * @throws \ImagickException
1360 private static function fetchObject(string $object_id, array $object = [], bool $trust_source = false, int $uid = 0)
1362 // By fetching the type we check if the object is complete.
1363 $type = JsonLD::fetchElement($object, '@type');
1365 if (!$trust_source || empty($type)) {
1366 $data = Processor::fetchCachedActivity($object_id, $uid);
1367 if (!empty($data)) {
1368 $object = JsonLD::compact($data);
1369 Logger::info('Fetched content for ' . $object_id);
1371 Logger::info('Empty content for ' . $object_id . ', check if content is available locally.');
1373 $item = Post::selectFirst(Item::DELIVER_FIELDLIST, ['uri' => $object_id]);
1374 if (!DBA::isResult($item)) {
1375 Logger::info('Object with url ' . $object_id . ' was not found locally.');
1378 Logger::info('Using already stored item for url ' . $object_id);
1379 $data = ActivityPub\Transmitter::createNote($item);
1380 $object = JsonLD::compact($data);
1383 $id = JsonLD::fetchElement($object, '@id');
1385 Logger::info('Empty id');
1389 if ($id != $object_id) {
1390 Logger::info('Fetched id differs from provided id', ['provided' => $object_id, 'fetched' => $id]);
1394 Logger::info('Using original object for url ' . $object_id);
1397 $type = JsonLD::fetchElement($object, '@type');
1399 Logger::info('Empty type');
1403 // Lemmy is resharing "create" activities instead of content
1404 // We fetch the content from the activity.
1405 if (in_array($type, ['as:Create'])) {
1406 $object = $object['as:object'];
1407 $type = JsonLD::fetchElement($object, '@type');
1409 Logger::info('Empty type');
1412 $object_data = self::processObject($object);
1415 // We currently don't handle 'pt:CacheFile', but with this step we avoid logging
1416 if (in_array($type, self::CONTENT_TYPES) || ($type == 'pt:CacheFile')) {
1417 $object_data = self::processObject($object);
1419 if (!empty($data)) {
1420 $object_data['raw-object'] = json_encode($data);
1422 return $object_data;
1425 if ($type == 'as:Announce') {
1426 $object_id = JsonLD::fetchElement($object, 'object', '@id');
1427 if (empty($object_id) || !is_string($object_id)) {
1430 return self::fetchObject($object_id, [], false, $uid);
1433 Logger::info('Unhandled object type: ' . $type);
1438 * Converts the language element (Used by Peertube)
1440 * @param array $languages
1441 * @return array Languages
1443 public static function processLanguages(array $languages): array
1445 if (empty($languages)) {
1449 $language_list = [];
1451 foreach ($languages as $language) {
1452 if (!empty($language['_:identifier']) && !empty($language['as:name'])) {
1453 $language_list[$language['_:identifier']] = $language['as:name'];
1456 return $language_list;
1460 * Convert tags from JSON-LD format into a simplified format
1462 * @param array $tags Tags in JSON-LD format
1464 * @return array with tags in a simplified format
1466 public static function processTags(array $tags): array
1470 foreach ($tags as $tag) {
1475 $element = ['type' => str_replace('as:', '', JsonLD::fetchElement($tag, '@type') ?? ''),
1476 'href' => JsonLD::fetchElement($tag, 'as:href', '@id'),
1477 'name' => JsonLD::fetchElement($tag, 'as:name', '@value')];
1479 if (empty($element['type'])) {
1483 if (empty($element['href'])) {
1484 $element['href'] = $element['name'];
1487 $taglist[] = $element;
1493 * Convert emojis from JSON-LD format into a simplified format
1495 * @param array $emojis
1496 * @return array with emojis in a simplified format
1498 private static function processEmojis(array $emojis): array
1502 foreach ($emojis as $emoji) {
1503 if (empty($emoji) || (JsonLD::fetchElement($emoji, '@type') != 'toot:Emoji') || empty($emoji['as:icon'])) {
1507 $url = JsonLD::fetchElement($emoji['as:icon'], 'as:url', '@id');
1508 $element = ['name' => JsonLD::fetchElement($emoji, 'as:name', '@value'),
1511 $emojilist[] = $element;
1518 * Convert attachments from JSON-LD format into a simplified format
1520 * @param array $attachments Attachments in JSON-LD format
1522 * @return array Attachments in a simplified format
1524 private static function processAttachments(array $attachments): array
1528 // Removes empty values
1529 $attachments = array_filter($attachments);
1531 foreach ($attachments as $attachment) {
1532 switch (JsonLD::fetchElement($attachment, '@type')) {
1537 $urls = JsonLD::fetchElementArray($attachment, 'as:url');
1538 foreach ($urls as $url) {
1539 // Single scalar URL case
1540 if (is_string($url)) {
1545 $href = JsonLD::fetchElement($url, 'as:href', '@id');
1546 $mediaType = JsonLD::fetchElement($url, 'as:mediaType', '@value');
1547 if (Strings::startsWith($mediaType, 'image')) {
1556 'title' => JsonLD::fetchElement($attachment, 'as:name', '@value'),
1557 'desc' => JsonLD::fetchElement($attachment, 'as:summary', '@value'),
1559 'image' => $pageImage,
1563 $mediaType = JsonLD::fetchElement($attachment, 'as:mediaType', '@value');
1564 $imageFullUrl = JsonLD::fetchElement($attachment, 'as:url', '@id');
1565 $imagePreviewUrl = null;
1567 if (!$imageFullUrl && ($urls = JsonLD::fetchElementArray($attachment, 'as:url'))) {
1568 $imageVariants = [];
1569 $previewVariants = [];
1570 foreach ($urls as $url) {
1571 // Scalar URL, no discrimination possible
1572 if (is_string($url)) {
1573 $imageFullUrl = $url;
1577 // Not sure what to do with a different Link media type than the base Image, we skip
1578 if ($mediaType != JsonLD::fetchElement($url, 'as:mediaType', '@value')) {
1582 $href = JsonLD::fetchElement($url, 'as:href', '@id');
1584 // Default URL choice if no discriminating width is provided
1585 $imageFullUrl = $href ?? $imageFullUrl;
1587 $width = intval(JsonLD::fetchElement($url, 'as:width', '@value') ?? 1);
1589 if ($href && $width) {
1590 $imageVariants[$width] = $href;
1591 // 632 is the ideal width for full screen frio posts, we compute the absolute distance to it
1592 $previewVariants[abs(632 - $width)] = $href;
1596 if ($imageVariants) {
1597 // Taking the maximum size image
1598 ksort($imageVariants);
1599 $imageFullUrl = array_pop($imageVariants);
1601 // Taking the minimum number distance to the target distance
1602 ksort($previewVariants);
1603 $imagePreviewUrl = array_shift($previewVariants);
1606 unset($imageVariants);
1607 unset($previewVariants);
1611 'type' => str_replace('as:', '', JsonLD::fetchElement($attachment, '@type')),
1612 'mediaType' => $mediaType,
1613 'name' => JsonLD::fetchElement($attachment, 'as:name', '@value'),
1614 'url' => $imageFullUrl,
1615 'image' => $imagePreviewUrl !== $imageFullUrl ? $imagePreviewUrl : null,
1620 'type' => str_replace('as:', '', JsonLD::fetchElement($attachment, '@type')),
1621 'mediaType' => JsonLD::fetchElement($attachment, 'as:mediaType', '@value'),
1622 'name' => JsonLD::fetchElement($attachment, 'as:name', '@value'),
1623 'url' => JsonLD::fetchElement($attachment, 'as:url', '@id'),
1624 'height' => JsonLD::fetchElement($attachment, 'as:height', '@value'),
1625 'width' => JsonLD::fetchElement($attachment, 'as:width', '@value'),
1626 'image' => JsonLD::fetchElement($attachment, 'as:image', '@id')
1635 * Convert questions from JSON-LD format into a simplified format
1637 * @param array $object
1639 * @return array Questions in a simplified format
1641 private static function processQuestion(array $object): array
1645 if (!empty($object['as:oneOf'])) {
1646 $question['multiple'] = false;
1647 $options = JsonLD::fetchElementArray($object, 'as:oneOf') ?? [];
1648 } elseif (!empty($object['as:anyOf'])) {
1649 $question['multiple'] = true;
1650 $options = JsonLD::fetchElementArray($object, 'as:anyOf') ?? [];
1655 $closed = JsonLD::fetchElement($object, 'as:closed', '@value');
1656 if (!empty($closed)) {
1657 $question['end-time'] = $closed;
1659 $question['end-time'] = JsonLD::fetchElement($object, 'as:endTime', '@value');
1662 $question['voters'] = (int)JsonLD::fetchElement($object, 'toot:votersCount', '@value');
1663 $question['options'] = [];
1667 foreach ($options as $option) {
1668 if (JsonLD::fetchElement($option, '@type') != 'as:Note') {
1672 $name = JsonLD::fetchElement($option, 'as:name', '@value');
1674 if (empty($option['as:replies'])) {
1678 $replies = JsonLD::fetchElement($option['as:replies'], 'as:totalItems', '@value');
1680 $question['options'][] = ['name' => $name, 'replies' => $replies];
1682 $voters += (int)$replies;
1685 // For single choice question we can count the number of voters if not provided (like with Misskey)
1686 if (empty($question['voters']) && !$question['multiple']) {
1687 $question['voters'] = $voters;
1694 * Fetch the original source or content with the "language" Markdown or HTML
1696 * @param array $object
1697 * @param array $object_data
1699 * @return array Object data (?)
1700 * @throws \Exception
1702 private static function getSource(array $object, array $object_data): array
1704 $object_data['source'] = JsonLD::fetchElement($object, 'as:source', 'as:content', 'as:mediaType', 'text/bbcode');
1705 $object_data['source'] = JsonLD::fetchElement($object_data, 'source', '@value');
1706 if (!empty($object_data['source'])) {
1707 return $object_data;
1710 $object_data['source'] = JsonLD::fetchElement($object, 'as:source', 'as:content', 'as:mediaType', 'text/markdown');
1711 $object_data['source'] = JsonLD::fetchElement($object_data, 'source', '@value');
1712 if (!empty($object_data['source'])) {
1713 $object_data['source'] = Markdown::toBBCode($object_data['source']);
1714 return $object_data;
1717 $object_data['source'] = JsonLD::fetchElement($object, 'as:source', 'as:content', 'as:mediaType', 'text/html');
1718 $object_data['source'] = JsonLD::fetchElement($object_data, 'source', '@value');
1719 if (!empty($object_data['source'])) {
1720 $object_data['source'] = HTML::toBBCode($object_data['source']);
1721 return $object_data;
1724 return $object_data;
1728 * Extracts a potential alternate URL from a list of additional URL elements
1730 * @param array $urls
1733 private static function extractAlternateUrl(array $urls): string
1736 foreach ($urls as $key => $url) {
1737 // Not a list but a single URL element
1738 if (!is_numeric($key)) {
1742 if (empty($url['@type']) || ($url['@type'] != 'as:Link')) {
1746 $href = JsonLD::fetchElement($url, 'as:href', '@id');
1751 $mediatype = JsonLD::fetchElement($url, 'as:mediaType');
1752 if (empty($mediatype)) {
1756 if ($mediatype == 'text/html') {
1757 $alternateUrl = $href;
1761 return $alternateUrl;
1765 * Check if the "as:url" element is an array with multiple links
1766 * This is the case with audio and video posts.
1767 * Then the links are added as attachments
1769 * @param array $urls The object URL list
1770 * @return array an array of attachments
1772 private static function processAttachmentUrls(array $urls): array
1775 foreach ($urls as $key => $url) {
1776 // Not a list but a single URL element
1777 if (!is_numeric($key)) {
1781 if (empty($url['@type']) || ($url['@type'] != 'as:Link')) {
1785 $href = JsonLD::fetchElement($url, 'as:href', '@id');
1790 $mediatype = JsonLD::fetchElement($url, 'as:mediaType');
1791 if (empty($mediatype)) {
1795 $filetype = strtolower(substr($mediatype, 0, strpos($mediatype, '/')));
1797 if ($filetype == 'audio') {
1798 $attachments[] = ['type' => $filetype, 'mediaType' => $mediatype, 'url' => $href, 'height' => null, 'size' => null, 'name' => ''];
1799 } elseif ($filetype == 'video') {
1800 $height = (int)JsonLD::fetchElement($url, 'as:height', '@value');
1801 // PeerTube audio-only track
1802 if ($height === 0) {
1806 $size = (int)JsonLD::fetchElement($url, 'pt:size', '@value');
1807 $attachments[] = ['type' => $filetype, 'mediaType' => $mediatype, 'url' => $href, 'height' => $height, 'size' => $size, 'name' => ''];
1808 } elseif (in_array($mediatype, ['application/x-bittorrent', 'application/x-bittorrent;x-scheme-handler/magnet'])) {
1809 $height = (int)JsonLD::fetchElement($url, 'as:height', '@value');
1811 // For Torrent links we always store the highest resolution
1812 if (!empty($attachments[$mediatype]['height']) && ($height < $attachments[$mediatype]['height'])) {
1816 $attachments[$mediatype] = ['type' => $mediatype, 'mediaType' => $mediatype, 'url' => $href, 'height' => $height, 'size' => null, 'name' => ''];
1817 } elseif ($mediatype == 'application/x-mpegURL') {
1818 // PeerTube exception, actual video link is in the tags of this URL element
1819 $attachments = array_merge($attachments, self::processAttachmentUrls($url['as:tag']));
1823 return array_values($attachments);
1827 * Fetches data from the object part of an activity
1829 * @param array $object
1831 * @return array|bool Object data or FALSE if $object does not contain @id element
1832 * @throws \Exception
1834 private static function processObject(array $object)
1836 if (!JsonLD::fetchElement($object, '@id')) {
1841 $object_data['object_type'] = JsonLD::fetchElement($object, '@type');
1842 $object_data['id'] = JsonLD::fetchElement($object, '@id');
1843 $object_data['reply-to-id'] = JsonLD::fetchElement($object, 'as:inReplyTo', '@id');
1845 // An empty "id" field is translated to "./" by the compactor, so we have to check for this content
1846 if (empty($object_data['reply-to-id']) || ($object_data['reply-to-id'] == './')) {
1847 $object_data['reply-to-id'] = $object_data['id'];
1849 // On activities the "reply to" is the id of the object it refers to
1850 if (in_array($object_data['object_type'], self::ACTIVITY_TYPES)) {
1851 $object_id = JsonLD::fetchElement($object, 'as:object', '@id');
1852 if (!empty($object_id)) {
1853 $object_data['reply-to-id'] = $object_id;
1857 // Some systems (e.g. GNU Social) don't reply to the "id" field but the "uri" field.
1858 $replyToId = Item::getURIByLink($object_data['reply-to-id']);
1859 if (!empty($replyToId) && ($object_data['reply-to-id'] != $replyToId)) {
1860 Logger::notice('Fix wrong reply-to', ['received' => $object_data['reply-to-id'], 'correct' => $replyToId]);
1861 $object_data['reply-to-id'] = $replyToId;
1865 $object_data['published'] = JsonLD::fetchElement($object, 'as:published', '@value');
1866 $object_data['updated'] = JsonLD::fetchElement($object, 'as:updated', '@value');
1868 if (empty($object_data['updated'])) {
1869 $object_data['updated'] = $object_data['published'];
1872 if (empty($object_data['published']) && !empty($object_data['updated'])) {
1873 $object_data['published'] = $object_data['updated'];
1876 $actor = JsonLD::fetchElement($object, 'as:attributedTo', '@id');
1877 if (empty($actor)) {
1878 $actor = JsonLD::fetchElement($object, 'as:actor', '@id');
1881 $location = JsonLD::fetchElement($object, 'as:location', 'as:name', '@type', 'as:Place');
1882 $location = JsonLD::fetchElement($location, 'location', '@value');
1884 // Some AP software allow formatted text in post location, so we run all the text converters we have to boil
1885 // down to HTML and then finally format to plaintext.
1886 $location = Markdown::convert($location);
1887 $location = BBCode::toPlaintext($location);
1890 $object_data['sc:identifier'] = JsonLD::fetchElement($object, 'sc:identifier', '@value');
1891 $object_data['diaspora:guid'] = JsonLD::fetchElement($object, 'diaspora:guid', '@value');
1892 $object_data['diaspora:comment'] = JsonLD::fetchElement($object, 'diaspora:comment', '@value');
1893 $object_data['diaspora:like'] = JsonLD::fetchElement($object, 'diaspora:like', '@value');
1894 $object_data['actor'] = $object_data['author'] = $actor;
1895 $element = JsonLD::fetchElement($object, 'as:context', '@id');
1896 $object_data['context'] = $element != './' ? $element : null;
1897 $element = JsonLD::fetchElement($object, 'ostatus:conversation', '@id');
1898 $object_data['conversation'] = $element != './' ? $element : null;
1899 $object_data['sensitive'] = JsonLD::fetchElement($object, 'as:sensitive');
1900 $object_data['name'] = JsonLD::fetchElement($object, 'as:name', '@value');
1901 $object_data['summary'] = JsonLD::fetchElement($object, 'as:summary', '@value');
1902 $object_data['content'] = JsonLD::fetchElement($object, 'as:content', '@value');
1903 $object_data['mediatype'] = JsonLD::fetchElement($object, 'as:mediaType', '@value');
1904 $object_data = self::getSource($object, $object_data);
1905 $object_data['start-time'] = JsonLD::fetchElement($object, 'as:startTime', '@value');
1906 $object_data['end-time'] = JsonLD::fetchElement($object, 'as:endTime', '@value');
1907 $object_data['location'] = $location;
1908 $object_data['latitude'] = JsonLD::fetchElement($object, 'as:location', 'as:latitude', '@type', 'as:Place');
1909 $object_data['latitude'] = JsonLD::fetchElement($object_data, 'latitude', '@value');
1910 $object_data['longitude'] = JsonLD::fetchElement($object, 'as:location', 'as:longitude', '@type', 'as:Place');
1911 $object_data['longitude'] = JsonLD::fetchElement($object_data, 'longitude', '@value');
1912 $object_data['attachments'] = self::processAttachments(JsonLD::fetchElementArray($object, 'as:attachment') ?? []);
1913 $object_data['tags'] = self::processTags(JsonLD::fetchElementArray($object, 'as:tag') ?? []);
1914 $object_data['emojis'] = self::processEmojis(JsonLD::fetchElementArray($object, 'as:tag', null, '@type', 'toot:Emoji') ?? []);
1915 $object_data['languages'] = self::processLanguages(JsonLD::fetchElementArray($object, 'sc:inLanguage') ?? []);
1916 $object_data['generator'] = JsonLD::fetchElement($object, 'as:generator', 'as:name', '@type', 'as:Application');
1917 $object_data['generator'] = JsonLD::fetchElement($object_data, 'generator', '@value');
1918 $object_data['alternate-url'] = JsonLD::fetchElement($object, 'as:url', '@id');
1920 // Special treatment for Hubzilla links
1921 if (is_array($object_data['alternate-url'])) {
1922 $object_data['alternate-url'] = JsonLD::fetchElement($object_data['alternate-url'], 'as:href', '@id');
1924 if (!is_string($object_data['alternate-url'])) {
1925 $object_data['alternate-url'] = JsonLD::fetchElement($object['as:url'], 'as:href', '@id');
1929 if (!empty($object_data['alternate-url']) && !Network::isValidHttpUrl($object_data['alternate-url'])) {
1930 $object_data['alternate-url'] = null;
1933 if (in_array($object_data['object_type'], ['as:Audio', 'as:Video'])) {
1934 $object_data['alternate-url'] = self::extractAlternateUrl($object['as:url'] ?? []) ?: $object_data['alternate-url'];
1935 $object_data['attachments'] = array_merge($object_data['attachments'], self::processAttachmentUrls($object['as:url'] ?? []));
1938 // Support for quoted posts (Pleroma, Fedibird and Misskey)
1939 $object_data['quote-url'] = JsonLD::fetchElement($object, 'as:quoteUrl', '@value');
1940 if (empty($object_data['quote-url'])) {
1941 $object_data['quote-url'] = JsonLD::fetchElement($object, 'fedibird:quoteUri', '@value');
1943 if (empty($object_data['quote-url'])) {
1944 $object_data['quote-url'] = JsonLD::fetchElement($object, 'misskey:_misskey_quote', '@value');
1947 // Misskey adds some data to the standard "content" value for quoted posts for backwards compatibility.
1948 // Their own "_misskey_content" value does then contain the content without this extra data.
1949 if (!empty($object_data['quote-url'])) {
1950 $misskey_content = JsonLD::fetchElement($object, 'misskey:_misskey_content', '@value');
1951 if (!empty($misskey_content)) {
1952 $object_data['content'] = $misskey_content;
1956 // For page types we expect that the alternate url posts to some page.
1957 // So we add this to the attachments if it differs from the id.
1958 // Currently only Lemmy is using the page type.
1959 if (($object_data['object_type'] == 'as:Page') && !empty($object_data['alternate-url']) && !Strings::compareLink($object_data['alternate-url'], $object_data['id'])) {
1960 $object_data['attachments'][] = ['url' => $object_data['alternate-url']];
1961 $object_data['alternate-url'] = null;
1964 if ($object_data['object_type'] == 'as:Question') {
1965 $object_data['question'] = self::processQuestion($object);
1968 $receiverdata = self::getReceivers($object, $object_data['actor'] ?? '', $object_data['tags'], true);
1969 $receivers = $reception_types = [];
1970 foreach ($receiverdata as $key => $data) {
1971 $receivers[$key] = $data['uid'];
1972 $reception_types[$data['uid']] = $data['type'] ?? 0;
1975 $object_data['receiver_urls'] = self::getReceiverURL($object);
1976 $object_data['receiver'] = $receivers;
1977 $object_data['reception_type'] = $reception_types;
1979 $object_data['unlisted'] = in_array(-1, $object_data['receiver']);
1980 unset($object_data['receiver'][-1]);
1981 unset($object_data['reception_type'][-1]);
1983 return $object_data;
1987 * Add an object id to the list of arrived activities
1993 private static function addArrivedId(string $id)
1995 DBA::delete('arrived-activity', ["`received` < ?", DateTimeFormat::utc('now - 5 minutes')]);
1996 DBA::insert('arrived-activity', ['object-id' => $id, 'received' => DateTimeFormat::utcNow()], Database::INSERT_IGNORE);
2000 * Checks if the given object already arrived before
2006 private static function hasArrived(string $id): bool
2008 return DBA::exists('arrived-activity', ['object-id' => $id]);