3 * @copyright Copyright (C) 2010-2023, the Friendica project
5 * @license GNU AGPL version 3 or any later version
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU Affero General Public License as
9 * published by the Free Software Foundation, either version 3 of the
10 * License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU Affero General Public License for more details.
17 * You should have received a copy of the GNU Affero General Public License
18 * along with this program. If not, see <https://www.gnu.org/licenses/>.
22 namespace Friendica\Protocol\ActivityPub;
24 use Friendica\Content\Text\BBCode;
25 use Friendica\Database\DBA;
26 use Friendica\Content\Text\HTML;
27 use Friendica\Content\Text\Markdown;
28 use Friendica\Core\Logger;
29 use Friendica\Core\Protocol;
30 use Friendica\Core\System;
31 use Friendica\Core\Worker;
32 use Friendica\Database\Database;
34 use Friendica\Model\Contact;
35 use Friendica\Model\APContact;
36 use Friendica\Model\Item;
37 use Friendica\Model\Post;
38 use Friendica\Model\User;
39 use Friendica\Protocol\Activity;
40 use Friendica\Protocol\ActivityPub;
41 use Friendica\Util\DateTimeFormat;
42 use Friendica\Util\HTTPSignature;
43 use Friendica\Util\JsonLD;
44 use Friendica\Util\LDSignature;
45 use Friendica\Util\Network;
46 use Friendica\Util\Strings;
49 * ActivityPub Receiver Protocol class
54 * Check what this is meant to do:
63 const PUBLIC_COLLECTION = 'as:Public';
64 const ACCOUNT_TYPES = ['as:Person', 'as:Organization', 'as:Service', 'as:Group', 'as:Application'];
65 const CONTENT_TYPES = ['as:Note', 'as:Article', 'as:Video', 'as:Image', 'as:Event', 'as:Audio', 'as:Page', 'as:Question'];
66 const ACTIVITY_TYPES = ['as:Like', 'as:Dislike', 'as:Accept', 'as:Reject', 'as:TentativeAccept', 'as:View', 'as:Read', 'litepub:EmojiReact'];
68 const TARGET_UNKNOWN = 0;
73 const TARGET_FOLLOWER = 5;
74 const TARGET_ANSWER = 6;
75 const TARGET_GLOBAL = 7;
76 const TARGET_AUDIENCE = 8;
78 const COMPLETION_NONE = 0;
79 const COMPLETION_ANNOUNCE = 1;
80 const COMPLETION_RELAY = 2;
81 const COMPLETION_MANUAL = 3;
82 const COMPLETION_AUTO = 4;
85 * Checks incoming message from the inbox
87 * @param string $body Body string
88 * @param array $header Header lines
89 * @param integer $uid User ID
93 public static function processInbox(string $body, array $header, int $uid)
95 $activity = json_decode($body, true);
96 if (empty($activity)) {
97 Logger::warning('Invalid body.');
101 $ldactivity = JsonLD::compact($activity);
103 $actor = JsonLD::fetchElement($ldactivity, 'as:actor', '@id') ?? '';
105 $apcontact = APContact::getByURL($actor);
107 if (empty($apcontact)) {
108 Logger::notice('Unable to retrieve AP contact for actor - message is discarded', ['actor' => $actor]);
110 } elseif (APContact::isRelay($apcontact)) {
111 self::processRelayPost($ldactivity, $actor);
114 APContact::unmarkForArchival($apcontact);
117 $sig_contact = HTTPSignature::getKeyIdContact($header);
118 if (APContact::isRelay($sig_contact)) {
119 Logger::info('Message from a relay', ['url' => $sig_contact['url']]);
120 self::processRelayPost($ldactivity, $sig_contact['url']);
124 $http_signer = HTTPSignature::getSigner($body, $header);
125 if ($http_signer === false) {
126 Logger::notice('Invalid HTTP signature, message will not be trusted.', ['uid' => $uid, 'actor' => $actor, 'header' => $header, 'body' => $body]);
128 } elseif (empty($http_signer)) {
129 Logger::info('Signer is a tombstone. The message will be discarded, the signer account is deleted.');
132 Logger::info('Valid HTTP signature', ['signer' => $http_signer]);
133 $signer = [$http_signer];
136 Logger::info('Message for user ' . $uid . ' is from actor ' . $actor);
138 if ($http_signer === false) {
139 $trust_source = false;
140 } elseif (LDSignature::isSigned($activity)) {
141 $ld_signer = LDSignature::getSigner($activity);
142 if (empty($ld_signer)) {
143 Logger::info('Invalid JSON-LD signature from ' . $actor);
144 } elseif ($ld_signer != $http_signer) {
145 $signer[] = $ld_signer;
147 if (!empty($ld_signer && ($actor == $http_signer))) {
148 Logger::info('The HTTP and the JSON-LD signature belong to ' . $ld_signer);
149 $trust_source = true;
150 } elseif (!empty($ld_signer)) {
151 Logger::info('JSON-LD signature is signed by ' . $ld_signer);
152 $trust_source = true;
153 } elseif ($actor == $http_signer) {
154 Logger::info('Bad JSON-LD signature, but HTTP signer fits the actor.');
155 $trust_source = true;
157 Logger::info('Invalid JSON-LD signature and the HTTP signer is different.');
158 $trust_source = false;
160 } elseif ($actor == $http_signer) {
161 Logger::info('Trusting post without JSON-LD signature, The actor fits the HTTP signer.');
162 $trust_source = true;
164 Logger::info('No JSON-LD signature, different actor.');
165 $trust_source = false;
168 self::processActivity($ldactivity, $body, $uid, $trust_source, true, $signer, $http_signer);
172 * Process incoming posts from relays
174 * @param array $activity
175 * @param string $actor
178 private static function processRelayPost(array $activity, string $actor)
180 $type = JsonLD::fetchElement($activity, '@type');
182 Logger::notice('Empty type', ['activity' => $activity, 'actor' => $actor]);
186 $object_type = JsonLD::fetchElement($activity, 'as:object', '@type') ?? '';
188 $object_id = JsonLD::fetchElement($activity, 'as:object', '@id');
189 if (empty($object_id)) {
190 Logger::notice('No object id found', ['type' => $type, 'object_type' => $object_type, 'actor' => $actor, 'activity' => $activity]);
194 $handle = ($type == 'as:Announce');
196 if (!$handle && in_array($type, ['as:Create', 'as:Update'])) {
197 $handle = in_array($object_type, self::CONTENT_TYPES);
201 $trust_source = false;
202 $object_data = self::prepareObjectData($activity, 0, false, $trust_source);
204 if (!$trust_source) {
205 Logger::notice('Activity trust could not be achieved.', ['type' => $type, 'object_type' => $object_type, 'object_id' => $object_id, 'actor' => $actor, 'activity' => $activity]);
209 if (empty($object_data)) {
210 Logger::notice('No object data found', ['type' => $type, 'object_type' => $object_type, 'object_id' => $object_id, 'actor' => $actor, 'activity' => $activity]);
214 if (self::routeActivities($object_data, $type, true)) {
215 Logger::debug('Handled activity', ['type' => $type, 'object_type' => $object_type, 'object_id' => $object_id, 'actor' => $actor]);
217 Logger::info('Unhandled activity', ['type' => $type, 'object_type' => $object_type, 'object_id' => $object_id, 'actor' => $actor, 'activity' => $activity]);
222 $contact = Contact::getByURL($actor);
223 if (empty($contact)) {
224 Logger::info('Relay contact not found', ['actor' => $actor]);
228 if (!in_array($contact['rel'], [Contact::SHARING, Contact::FRIEND])) {
229 Logger::notice('Relay is no sharer', ['actor' => $actor]);
233 Logger::debug('Got relayed message id', ['id' => $object_id, 'actor' => $actor]);
235 $item_id = Item::searchByLink($object_id);
237 Logger::info('Relayed message already exists', ['id' => $object_id, 'item' => $item_id, 'actor' => $actor]);
241 $id = Processor::fetchMissingActivity($object_id, [], $actor, self::COMPLETION_RELAY);
243 Logger::notice('Relayed message had not been fetched', ['id' => $object_id, 'actor' => $actor]);
249 * Fetches the object type for a given object id
251 * @param array $activity
252 * @param string $object_id Object ID of the provided object
253 * @param integer $uid User ID
255 * @return string with object type or NULL
256 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
257 * @throws \ImagickException
259 public static function fetchObjectType(array $activity, string $object_id, int $uid = 0)
261 if (!empty($activity['as:object'])) {
262 $object_type = JsonLD::fetchElement($activity['as:object'], '@type');
263 if (!empty($object_type)) {
268 if (Post::exists(['uri' => $object_id, 'gravity' => [Item::GRAVITY_PARENT, Item::GRAVITY_COMMENT]])) {
269 // We just assume "note" since it doesn't make a difference for the further processing
273 $profile = APContact::getByURL($object_id);
274 if (!empty($profile['type'])) {
275 APContact::unmarkForArchival($profile);
276 return 'as:' . $profile['type'];
279 $data = Processor::fetchCachedActivity($object_id, $uid);
281 $object = JsonLD::compact($data);
282 $type = JsonLD::fetchElement($object, '@type');
292 * Prepare the object array
294 * @param array $activity Array with activity data
295 * @param integer $uid User ID
296 * @param boolean $push Message had been pushed to our system
297 * @param boolean $trust_source Do we trust the source?
299 * @return array with object data
300 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
301 * @throws \ImagickException
303 public static function prepareObjectData(array $activity, int $uid, bool $push, bool &$trust_source): array
305 $id = JsonLD::fetchElement($activity, '@id');
306 $type = JsonLD::fetchElement($activity, '@type');
307 $object_id = JsonLD::fetchElement($activity, 'as:object', '@id');
309 if (!empty($object_id) && in_array($type, ['as:Create', 'as:Update'])) {
310 $fetch_id = $object_id;
315 if (!empty($activity['as:object'])) {
316 $object_type = JsonLD::fetchElement($activity['as:object'], '@type');
321 if (!empty($id) && !$trust_source) {
322 $fetch_uid = $uid ?: self::getBestUserForActivity($activity);
324 $fetched_activity = Processor::fetchCachedActivity($fetch_id, $fetch_uid);
325 if (!empty($fetched_activity)) {
327 $object = JsonLD::compact($fetched_activity);
329 $fetched_id = JsonLD::fetchElement($object, '@id');
330 $fetched_type = JsonLD::fetchElement($object, '@type');
332 if (($fetched_id == $id) && !empty($fetched_type) && ($fetched_type == $type)) {
333 Logger::info('Activity had been fetched successfully', ['id' => $id]);
334 $trust_source = true;
336 } elseif (($fetched_id == $object_id) && !empty($fetched_type) && ($fetched_type == $object_type)) {
337 Logger::info('Fetched data is the object instead of the activity', ['id' => $id]);
338 $trust_source = true;
339 unset($object['@context']);
340 $activity['as:object'] = $object;
342 Logger::info('Activity id is not equal', ['id' => $id, 'fetched' => $fetched_id]);
345 Logger::info('Activity could not been fetched', ['id' => $id]);
349 $actor = JsonLD::fetchElement($activity, 'as:actor', '@id');
351 Logger::info('Empty actor', ['activity' => $activity]);
355 $type = JsonLD::fetchElement($activity, '@type');
357 // Fetch all receivers from to, cc, bto and bcc
358 $receiverdata = self::getReceivers($activity, $actor, [], false, $push || $fetched);
359 $receivers = $reception_types = [];
360 foreach ($receiverdata as $key => $data) {
361 $receivers[$key] = $data['uid'];
362 $reception_types[$data['uid']] = $data['type'] ?? self::TARGET_UNKNOWN;
365 $urls = self::getReceiverURL($activity);
367 // When it is a delivery to a personal inbox we add that user to the receivers
369 $additional = [$uid => $uid];
370 $receivers = array_replace($receivers, $additional);
371 if (empty($activity['thread-completion']) && (empty($reception_types[$uid]) || in_array($reception_types[$uid], [self::TARGET_UNKNOWN, self::TARGET_FOLLOWER, self::TARGET_ANSWER, self::TARGET_GLOBAL]))) {
372 $reception_types[$uid] = self::TARGET_BCC;
373 $owner = User::getOwnerDataById($uid);
374 if (!empty($owner['url'])) {
375 $urls['as:bcc'][] = $owner['url'];
380 // We possibly need some user to fetch private content,
381 // so we fetch one out of the receivers if no uid is provided.
382 $fetch_uid = $uid ?: self::getBestUserForActivity($activity);
384 $object_id = JsonLD::fetchElement($activity, 'as:object', '@id');
385 if (empty($object_id)) {
386 Logger::info('No object found');
390 if (!is_string($object_id)) {
391 Logger::info('Invalid object id', ['object' => $object_id]);
395 $object_type = self::fetchObjectType($activity, $object_id, $fetch_uid);
397 // Fetch the activity on Lemmy "Announce" messages (announces of activities)
398 if (($type == 'as:Announce') && in_array($object_type, array_merge(self::ACTIVITY_TYPES, ['as:Delete', 'as:Undo', 'as:Update']))) {
399 Logger::debug('Fetch announced activity', ['object' => $object_id, 'uid' => $fetch_uid]);
400 $data = Processor::fetchCachedActivity($object_id, $fetch_uid);
402 $type = $object_type;
403 $announced_activity = JsonLD::compact($data);
405 // Some variables need to be refetched since the activity changed
406 $actor = JsonLD::fetchElement($announced_activity, 'as:actor', '@id');
407 $announced_id = JsonLD::fetchElement($announced_activity, 'as:object', '@id');
408 if (empty($announced_id)) {
409 Logger::warning('No object id in announced activity', ['id' => $object_id, 'activity' => $activity, 'announced' => $announced_activity]);
412 $activity = $announced_activity;
413 $object_id = $announced_id;
415 $object_type = self::fetchObjectType($activity, $object_id, $fetch_uid);
419 // Any activities on account types must not be altered
420 if (in_array($type, ['as:Flag'])) {
422 $object_data['id'] = JsonLD::fetchElement($activity, '@id');
423 $object_data['object_id'] = JsonLD::fetchElement($activity, 'as:object', '@id');
424 $object_data['object_ids'] = JsonLD::fetchElementArray($activity, 'as:object', '@id');
425 $object_data['content'] = JsonLD::fetchElement($activity, 'as:content', '@type');
426 } elseif (in_array($object_type, self::ACCOUNT_TYPES)) {
428 $object_data['id'] = JsonLD::fetchElement($activity, '@id');
429 $object_data['object_id'] = JsonLD::fetchElement($activity, 'as:object', '@id');
430 $object_data['object_actor'] = JsonLD::fetchElement($activity['as:object'], 'as:actor', '@id');
431 $object_data['object_object'] = JsonLD::fetchElement($activity['as:object'], 'as:object');
432 $object_data['object_type'] = JsonLD::fetchElement($activity['as:object'], '@type');
433 if (!$trust_source && ($type == 'as:Delete')) {
434 $apcontact = APContact::getByURL($object_data['object_id'], true);
435 $trust_source = empty($apcontact) || ($apcontact['type'] == 'Tombstone') || $apcontact['suspended'];
437 } elseif (in_array($type, ['as:Create', 'as:Update', 'as:Invite']) || strpos($type, '#emojiReaction')) {
438 // Fetch the content only on activities where this matters
439 // We can receive "#emojiReaction" when fetching content from Hubzilla systems
440 $object_data = self::fetchObject($object_id, $activity['as:object'], $trust_source, $fetch_uid);
441 if (empty($object_data)) {
442 Logger::info("Object data couldn't be processed");
446 $object_data['object_id'] = $object_id;
448 // Test if it is an answer to a mail
449 if (DBA::exists('mail', ['uri' => $object_data['reply-to-id']])) {
450 $object_data['directmessage'] = true;
452 $object_data['directmessage'] = JsonLD::fetchElement($activity, 'litepub:directMessage');
454 } elseif (in_array($type, array_merge(self::ACTIVITY_TYPES, ['as:Announce', 'as:Follow'])) && in_array($object_type, self::CONTENT_TYPES)) {
455 // Create a mostly empty array out of the activity data (instead of the object).
456 // This way we later don't have to check for the existence of each individual array element.
457 $object_data = self::processObject($activity);
458 $object_data['name'] = $type;
459 $object_data['author'] = JsonLD::fetchElement($activity, 'as:actor', '@id');
460 $object_data['object_id'] = $object_id;
461 $object_data['object_type'] = ''; // Since we don't fetch the object, we don't know the type
462 } elseif (in_array($type, ['as:Add', 'as:Remove', 'as:Move'])) {
464 $object_data['id'] = JsonLD::fetchElement($activity, '@id');
465 $object_data['target_id'] = JsonLD::fetchElement($activity, 'as:target', '@id');
466 $object_data['object_id'] = JsonLD::fetchElement($activity, 'as:object', '@id');
467 $object_data['object_type'] = JsonLD::fetchElement($activity['as:object'], '@type');
468 $object_data['object_content'] = JsonLD::fetchElement($activity['as:object'], 'as:content', '@type');
471 $object_data['id'] = JsonLD::fetchElement($activity, '@id');
472 $object_data['object_id'] = JsonLD::fetchElement($activity, 'as:object', '@id');
473 $object_data['object_actor'] = JsonLD::fetchElement($activity['as:object'], 'as:actor', '@id');
474 $object_data['object_object'] = JsonLD::fetchElement($activity['as:object'], 'as:object');
475 $object_data['object_type'] = JsonLD::fetchElement($activity['as:object'], '@type');
477 // An Undo is done on the object of an object, so we need that type as well
478 if (($type == 'as:Undo') && !empty($object_data['object_object'])) {
479 $object_data['object_object_type'] = self::fetchObjectType([], $object_data['object_object'], $fetch_uid);
482 if (!$trust_source && ($type == 'as:Delete') && in_array($object_data['object_type'], array_merge(['as:Tombstone', ''], self::CONTENT_TYPES))) {
483 $trust_source = Processor::isActivityGone($object_data['object_id']);
484 if (!$trust_source) {
485 $trust_source = !empty(APContact::getByURL($object_data['object_id'], false));
490 $object_data['push'] = $push;
492 $object_data = self::addActivityFields($object_data, $activity);
494 if (empty($object_data['object_type'])) {
495 $object_data['object_type'] = $object_type;
498 foreach (['as:to', 'as:cc', 'as:bto', 'as:bcc', 'as:audience', 'as:attributedTo'] as $element) {
499 if ((empty($object_data['receiver_urls'][$element]) || in_array($element, ['as:bto', 'as:bcc'])) && !empty($urls[$element])) {
500 $object_data['receiver_urls'][$element] = array_unique(array_merge($object_data['receiver_urls'][$element] ?? [], $urls[$element]));
504 $object_data['type'] = $type;
505 $object_data['actor'] = $actor;
506 $object_data['item_receiver'] = $receivers;
507 $object_data['receiver'] = array_replace($object_data['receiver'] ?? [], $receivers);
508 $object_data['reception_type'] = array_replace($object_data['reception_type'] ?? [], $reception_types);
510 // This check here interferes with Hubzilla posts where the author host differs from the host the post was created
511 // $author = $object_data['author'] ?? $actor;
512 // if (!empty($author) && !empty($object_data['id'])) {
513 // $author_host = parse_url($author, PHP_URL_HOST);
514 // $id_host = parse_url($object_data['id'], PHP_URL_HOST);
515 // if ($author_host == $id_host) {
516 // Logger::info('Valid hosts', ['type' => $type, 'host' => $id_host]);
518 // Logger::notice('Differing hosts on author and id', ['type' => $type, 'author' => $author_host, 'id' => $id_host]);
519 // $trust_source = false;
523 $account = Contact::selectFirstAccount(['platform'], ['nurl' => Strings::normaliseLink($actor)]);
524 $platform = $account['platform'] ?? '';
526 Logger::info('Processing', ['type' => $object_data['type'], 'object_type' => $object_data['object_type'], 'id' => $object_data['id'], 'actor' => $actor, 'platform' => $platform]);
532 * Fetches the first user id from the receiver array
534 * @param array $receivers Array with receivers
535 * @return integer user id;
537 public static function getFirstUserFromReceivers(array $receivers): int
539 foreach ($receivers as $receiver) {
540 if (!empty($receiver)) {
548 * Processes the activity object
550 * @param array $activity Array with activity data
551 * @param string $body The unprocessed body
552 * @param int|null $uid User ID
553 * @param boolean $trust_source Do we trust the source?
554 * @param boolean $push Message had been pushed to our system
555 * @param array $signer The signer of the post
559 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
560 * @throws \ImagickException
562 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
564 $type = JsonLD::fetchElement($activity, '@type');
566 Logger::info('Empty type', ['activity' => $activity]);
570 if (!DI::config()->get('system', 'process_view') && ($type == 'as:View')) {
571 Logger::info('View activities are ignored.', ['signer' => $signer, 'http_signer' => $http_signer]);
575 if (!JsonLD::fetchElement($activity, 'as:object', '@id')) {
576 Logger::info('Empty object', ['activity' => $activity]);
580 $actor = JsonLD::fetchElement($activity, 'as:actor', '@id');
582 Logger::info('Empty actor', ['activity' => $activity]);
586 if (is_array($activity['as:object'])) {
587 $attributed_to = JsonLD::fetchElement($activity['as:object'], 'as:attributedTo', '@id');
592 // Test the provided signatures against the actor and "attributedTo"
594 if (!empty($attributed_to) && !empty($actor)) {
595 $trust_source = (in_array($actor, $signer) && in_array($attributed_to, $signer));
597 $trust_source = in_array($actor, $signer);
601 // $trust_source is called by reference and is set to true if the content was retrieved successfully
602 $object_data = self::prepareObjectData($activity, $uid, $push, $trust_source);
603 if (empty($object_data)) {
604 Logger::info('No object data found', ['activity' => $activity]);
608 // Lemmy is announcing activities.
609 // We are changing the announces into regular activities.
610 if (($type == 'as:Announce') && in_array($object_data['type'] ?? '', array_merge(self::ACTIVITY_TYPES, ['as:Delete', 'as:Undo', 'as:Update']))) {
611 Logger::debug('Change type of announce to activity', ['type' => $object_data['type']]);
612 $type = $object_data['type'];
615 if (!empty($body) && empty($object_data['raw'])) {
616 $object_data['raw'] = $body;
619 // Internal flag for thread completion. See Processor.php
620 if (!empty($activity['thread-completion'])) {
621 $object_data['thread-completion'] = $activity['thread-completion'];
624 if (!empty($activity['completion-mode'])) {
625 $object_data['completion-mode'] = $activity['completion-mode'];
628 if (!empty($activity['thread-children-type'])) {
629 $object_data['thread-children-type'] = $activity['thread-children-type'];
632 // Internal flag for posts that arrived via relay
633 if (!empty($activity['from-relay'])) {
634 $object_data['from-relay'] = $activity['from-relay'];
637 if ($type == 'as:Announce') {
638 $object_data['object_activity'] = $activity;
641 if (($type == 'as:Create') && $trust_source && !in_array($completion, [self::COMPLETION_MANUAL, self::COMPLETION_ANNOUNCE])) {
642 if (self::hasArrived($object_data['object_id'])) {
643 Logger::info('The activity already arrived.', ['id' => $object_data['object_id']]);
646 self::addArrivedId($object_data['object_id']);
648 if (Queue::exists($object_data['object_id'], $type)) {
649 Logger::info('The activity is already added.', ['id' => $object_data['object_id']]);
652 } elseif (($type == 'as:Create') && $trust_source && !self::hasArrived($object_data['object_id'])) {
653 self::addArrivedId($object_data['object_id']);
656 $decouple = DI::config()->get('system', 'decoupled_receiver') && !in_array($completion, [self::COMPLETION_MANUAL, self::COMPLETION_ANNOUNCE]);
658 if ($decouple && ($trust_source || DI::config()->get('debug', 'ap_inbox_store_untrusted'))) {
659 $object_data = Queue::add($object_data, $type, $uid, $http_signer, $push, $trust_source);
662 if (!$trust_source) {
663 Logger::info('Activity trust could not be achieved.', ['id' => $object_data['object_id'], 'type' => $type, 'signer' => $signer, 'actor' => $actor, 'attributedTo' => $attributed_to]);
667 if (!empty($object_data['entry-id']) && $decouple && ($push || ($completion == self::COMPLETION_RELAY))) {
668 if (Queue::isProcessable($object_data['entry-id'])) {
669 // We delay by 5 seconds to allow to accumulate all receivers
670 $delayed = date(DateTimeFormat::MYSQL, time() + 5);
671 Logger::debug('Initiate processing', ['id' => $object_data['entry-id'], 'uri' => $object_data['object_id']]);
672 $wid = Worker::add(['priority' => Worker::PRIORITY_HIGH, 'delayed' => $delayed], 'ProcessQueue', $object_data['entry-id']);
673 Queue::setWorkerId($object_data['entry-id'], $wid);
675 Logger::debug('Other queue entries need to be processed first.', ['id' => $object_data['entry-id']]);
680 if (!empty($activity['recursion-depth'])) {
681 $object_data['recursion-depth'] = $activity['recursion-depth'];
684 if (!self::routeActivities($object_data, $type, $push, true, $uid)) {
685 self::storeUnhandledActivity(true, $type, $object_data, $activity, $body, $uid, $trust_source, $push, $signer);
686 Queue::remove($object_data);
694 * @param array $object_data
695 * @param string $type
697 * @param bool $fetch_parents
700 * @return boolean Could the activity be routed?
702 public static function routeActivities(array $object_data, string $type, bool $push, bool $fetch_parents = true, int $uid = 0): bool
706 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
707 $item = ActivityPub\Processor::createItem($object_data, $fetch_parents);
708 ActivityPub\Processor::postItem($object_data, $item);
709 } elseif (in_array($object_data['object_type'], ['pt:CacheFile'])) {
710 // Unhandled Peertube activity
711 Queue::remove($object_data);
712 } elseif (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
713 ActivityPub\Processor::updatePerson($object_data);
720 if (in_array($object_data['object_type'], ['as:Event'])) {
721 $item = ActivityPub\Processor::createItem($object_data, $fetch_parents);
722 ActivityPub\Processor::postItem($object_data, $item);
729 if ($object_data['object_type'] == 'as:tag') {
730 ActivityPub\Processor::addTag($object_data);
731 } elseif (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
732 ActivityPub\Processor::addToFeaturedCollection($object_data);
733 } elseif (in_array($object_data['object_type'], ['as:Tombstone', ''])) {
734 // We don't have the object here or it is deleted. We ignore this activity.
735 Queue::remove($object_data);
742 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
743 if (!Item::searchByLink($object_data['object_id'], $uid)) {
744 if (ActivityPub\Processor::fetchMissingActivity($object_data['object_id'], [], $object_data['actor'], self::COMPLETION_ANNOUNCE, $uid)) {
745 Logger::debug('Created announced id', ['uid' => $uid, 'id' => $object_data['object_id']]);
746 Queue::remove($object_data);
748 Logger::debug('Announced id was not created', ['uid' => $uid, 'id' => $object_data['object_id']]);
749 Queue::remove($object_data);
753 Logger::info('Announced id already exists', ['uid' => $uid, 'id' => $object_data['object_id']]);
754 Queue::remove($object_data);
757 ActivityPub\Processor::createActivity($object_data, Activity::ANNOUNCE);
758 } elseif (in_array($object_data['object_type'], ['as:Tombstone', ''])) {
759 // We don't have the object here or it is deleted. We ignore this activity.
760 Queue::remove($object_data);
767 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
768 ActivityPub\Processor::createActivity($object_data, Activity::LIKE);
769 } elseif (in_array($object_data['object_type'], ['as:Tombstone', ''])) {
770 // We don't have the object here or it is deleted. We ignore this activity.
771 Queue::remove($object_data);
778 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
779 ActivityPub\Processor::createActivity($object_data, Activity::DISLIKE);
780 } elseif (in_array($object_data['object_type'], ['as:Tombstone', ''])) {
781 // We don't have the object here or it is deleted. We ignore this activity.
782 Queue::remove($object_data);
788 case 'as:TentativeAccept':
789 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
790 ActivityPub\Processor::createActivity($object_data, Activity::ATTENDMAYBE);
797 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
798 ActivityPub\Processor::updateItem($object_data);
799 } elseif (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
800 ActivityPub\Processor::updatePerson($object_data);
801 } elseif (in_array($object_data['object_type'], ['pt:CacheFile'])) {
802 // Unhandled Peertube activity
803 Queue::remove($object_data);
810 if (in_array($object_data['object_type'], array_merge(['as:Tombstone'], self::CONTENT_TYPES))) {
811 ActivityPub\Processor::deleteItem($object_data);
812 } elseif (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
813 ActivityPub\Processor::deletePerson($object_data);
814 } elseif ($object_data['object_type'] == '') {
815 // The object type couldn't be determined. Most likely we don't have it here. We ignore this activity.
816 Queue::remove($object_data);
823 if (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
824 ActivityPub\Processor::movePerson($object_data);
831 if (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
832 ActivityPub\Processor::blockAccount($object_data);
839 if (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
840 ActivityPub\Processor::ReportAccount($object_data);
847 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
848 ActivityPub\Processor::removeFromFeaturedCollection($object_data);
849 } elseif (in_array($object_data['object_type'], ['as:Tombstone', ''])) {
850 // We don't have the object here or it is deleted. We ignore this activity.
851 Queue::remove($object_data);
858 if (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
859 ActivityPub\Processor::followUser($object_data);
860 } elseif (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
861 $object_data['reply-to-id'] = $object_data['object_id'];
862 ActivityPub\Processor::createActivity($object_data, Activity::FOLLOW);
869 if ($object_data['object_type'] == 'as:Follow') {
870 if (!empty($object_data['object_actor'])) {
871 ActivityPub\Processor::acceptFollowUser($object_data);
873 Logger::notice('Unhandled "accept follow" message.', ['object_data' => $object_data]);
875 } elseif (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
876 ActivityPub\Processor::createActivity($object_data, Activity::ATTEND);
877 } elseif (!empty($object_data['object_id']) && empty($object_data['object_actor']) && empty($object_data['object_type'])) {
878 // Follow acceptances from gup.pe only contain the object id
879 ActivityPub\Processor::acceptFollowUser($object_data);
886 if ($object_data['object_type'] == 'as:Follow') {
887 ActivityPub\Processor::rejectFollowUser($object_data);
888 } elseif (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
889 ActivityPub\Processor::createActivity($object_data, Activity::ATTENDNO);
896 if (($object_data['object_type'] == 'as:Follow') &&
897 in_array($object_data['object_object_type'], self::ACCOUNT_TYPES)) {
898 ActivityPub\Processor::undoFollowUser($object_data);
899 } elseif (($object_data['object_type'] == 'as:Follow') &&
900 in_array($object_data['object_object_type'], self::CONTENT_TYPES)) {
901 ActivityPub\Processor::undoActivity($object_data);
902 } elseif (($object_data['object_type'] == 'as:Accept') &&
903 in_array($object_data['object_object_type'], self::ACCOUNT_TYPES)) {
904 ActivityPub\Processor::rejectFollowUser($object_data);
905 } elseif (($object_data['object_type'] == 'as:Block') &&
906 in_array($object_data['object_object_type'], self::ACCOUNT_TYPES)) {
907 ActivityPub\Processor::unblockAccount($object_data);
908 } elseif (in_array($object_data['object_type'], array_merge(self::ACTIVITY_TYPES, ['as:Announce', 'as:Create', ''])) &&
909 empty($object_data['object_object_type'])) {
910 // We cannot detect the target object. So we can ignore it.
911 Queue::remove($object_data);
912 } elseif (in_array($object_data['object_type'], array_merge(self::ACTIVITY_TYPES, ['as:Announce'])) &&
913 in_array($object_data['object_object_type'], array_merge(['as:Tombstone'], self::CONTENT_TYPES))) {
914 ActivityPub\Processor::undoActivity($object_data);
915 } elseif (in_array($object_data['object_type'], ['as:Create']) &&
916 in_array($object_data['object_object_type'], ['pt:CacheFile'])) {
917 // Unhandled Peertube activity
918 Queue::remove($object_data);
919 } elseif (in_array($object_data['object_type'], ['as:Delete'])) {
920 // We cannot undo deletions, so we just ignore this
921 Queue::remove($object_data);
922 } elseif (in_array($object_data['object_object_type'], ['as:Tombstone'])) {
923 // The object is a tombstone, we ignore any actions on it.
924 Queue::remove($object_data);
931 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
932 ActivityPub\Processor::createActivity($object_data, Activity::VIEW);
933 } elseif (in_array($object_data['object_type'], ['as:Tombstone', ''])) {
934 // We don't have the object here or it is deleted. We ignore this activity.
935 Queue::remove($object_data);
941 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
942 ActivityPub\Processor::createActivity($object_data, Activity::READ);
943 } elseif (in_array($object_data['object_type'], ['as:Tombstone', ''])) {
944 // We don't have the object here or it is deleted. We ignore this activity.
945 Queue::remove($object_data);
951 case 'litepub:EmojiReact':
952 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
953 ActivityPub\Processor::createActivity($object_data, Activity::EMOJIREACT);
954 } elseif (in_array($object_data['object_type'], ['as:Tombstone', ''])) {
955 // We don't have the object here or it is deleted. We ignore this activity.
956 Queue::remove($object_data);
963 Logger::info('Unknown activity: ' . $type . ' ' . $object_data['object_type']);
970 * Stores unhandled or unknown Activities as a file
972 * @param boolean $unknown "true" if the activity is unknown, "false" if it is unhandled
973 * @param string $type Activity type
974 * @param array $object_data Preprocessed array that is generated out of the received activity
975 * @param array $activity Array with activity data
976 * @param string $body The unprocessed body
977 * @param integer $uid User ID
978 * @param boolean $trust_source Do we trust the source?
979 * @param boolean $push Message had been pushed to our system
980 * @param array $signer The signer of the post
983 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 = [])
985 if (!DI::config()->get('debug', 'ap_log_unknown')) {
989 $file = ($unknown ? 'unknown-' : 'unhandled-') . str_replace(':', '-', $type) . '-';
991 if (!empty($object_data['object_type'])) {
992 $file .= str_replace(':', '-', $object_data['object_type']) . '-';
995 if (!empty($object_data['object_object_type'])) {
996 $file .= str_replace(':', '-', $object_data['object_object_type']) . '-';
999 $tempfile = tempnam(System::getTempPath(), $file);
1000 file_put_contents($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));
1001 Logger::notice('Unknown activity stored', ['type' => $type, 'object_type' => $object_data['object_type'], 'object_object_type' => $object_data['object_object_type'] ?? '', 'file' => $tempfile]);
1005 * Fetch a user id from an activity array
1007 * @param array $activity
1008 * @param string $actor
1010 * @return int user id
1012 public static function getBestUserForActivity(array $activity): int
1015 $actor = JsonLD::fetchElement($activity, 'as:actor', '@id') ?? '';
1017 $receivers = self::getReceivers($activity, $actor, [], false, false);
1018 foreach ($receivers as $receiver) {
1019 if ($receiver['type'] == self::TARGET_GLOBAL) {
1022 if (empty($uid) || ($receiver['type'] == self::TARGET_TO)) {
1023 $uid = $receiver['uid'];
1027 // When we haven't found any user yet, we just chose a user who most likely could have access to the content
1029 $contact = Contact::selectFirst(['uid'], ['nurl' => Strings::normaliseLink($actor), 'rel' => [Contact::SHARING, Contact::FRIEND]]);
1030 if (!empty($contact['uid'])) {
1031 $uid = $contact['uid'];
1038 // @TODO Missing documentation
1039 public static function getReceiverURL(array $activity): array
1043 foreach (['as:to', 'as:cc', 'as:bto', 'as:bcc', 'as:audience', 'as:attributedTo'] as $element) {
1044 $receiver_list = JsonLD::fetchElementArray($activity, $element, '@id');
1045 if (empty($receiver_list)) {
1049 foreach ($receiver_list as $receiver) {
1050 if ($receiver == 'Public') {
1051 Logger::warning('Not compacted public collection found', ['activity' => $activity, 'callstack' => System::callstack(20)]);
1052 $receiver = ActivityPub::PUBLIC_COLLECTION;
1054 if ($receiver == self::PUBLIC_COLLECTION) {
1055 $receiver = ActivityPub::PUBLIC_COLLECTION;
1057 $urls[$element][] = $receiver;
1065 * Fetch the receiver list from an activity array
1067 * @param array $activity
1068 * @param string $actor
1069 * @param array $tags
1070 * @param bool $fetch_unlisted
1073 * @return array with receivers (user id)
1074 * @throws \Exception
1076 private static function getReceivers(array $activity, string $actor, array $tags, bool $fetch_unlisted, bool $push): array
1078 $reply = $receivers = $profile = [];
1080 // When it is an answer, we inherit the receivers from the parent
1081 $replyto = JsonLD::fetchElement($activity, 'as:inReplyTo', '@id');
1082 if (!empty($replyto)) {
1083 $reply = [$replyto];
1085 // Fix possibly wrong item URI (could be an answer to a plink uri)
1086 $fixedReplyTo = Item::getURIByLink($replyto);
1087 if (!empty($fixedReplyTo)) {
1088 $reply[] = $fixedReplyTo;
1092 // Fetch all posts that refer to the object id
1093 $object_id = JsonLD::fetchElement($activity, 'as:object', '@id');
1094 if (!empty($object_id)) {
1095 $reply[] = $object_id;
1098 if (!empty($actor)) {
1099 $profile = APContact::getByURL($actor);
1100 $followers = $profile['followers'] ?? '';
1101 $is_forum = ($actor['type'] ?? '') == 'Group';
1103 Contact::updateByUrlIfNeeded($actor);
1105 Logger::info('Got actor and followers', ['actor' => $actor, 'followers' => $followers]);
1107 Logger::info('Empty actor', ['activity' => $activity]);
1112 // We have to prevent false follower assumptions upon thread completions
1113 $follower_target = empty($activity['thread-completion']) ? self::TARGET_FOLLOWER : self::TARGET_UNKNOWN;
1115 foreach (['as:to', 'as:cc', 'as:bto', 'as:bcc','as:audience'] as $element) {
1116 $receiver_list = JsonLD::fetchElementArray($activity, $element, '@id');
1117 if (empty($receiver_list)) {
1121 foreach ($receiver_list as $receiver) {
1122 if ($receiver == self::PUBLIC_COLLECTION) {
1123 $receivers[0] = ['uid' => 0, 'type' => self::TARGET_GLOBAL];
1126 // Add receiver "-1" for unlisted posts
1127 if ($fetch_unlisted && ($receiver == self::PUBLIC_COLLECTION) && ($element == 'as:cc')) {
1128 $receivers[-1] = ['uid' => -1, 'type' => self::TARGET_GLOBAL];
1131 // Fetch the receivers for the public and the followers collection
1132 if ((($receiver == $followers) || (($receiver == self::PUBLIC_COLLECTION) && !$is_forum)) && !empty($actor)) {
1133 $receivers = self::getReceiverForActor($actor, $tags, $receivers, $follower_target, $profile);
1137 // Fetching all directly addressed receivers
1138 $condition = ['self' => true, 'nurl' => Strings::normaliseLink($receiver)];
1139 $contact = DBA::selectFirst('contact', ['uid', 'contact-type'], $condition);
1140 if (!DBA::isResult($contact)) {
1144 // Check if the potential receiver is following the actor
1145 // Exception: The receiver is targetted via "to" or this is a comment
1146 if ((($element != 'as:to') && empty($replyto)) || ($contact['contact-type'] == Contact::TYPE_COMMUNITY)) {
1147 $networks = Protocol::FEDERATED;
1148 $condition = ['nurl' => Strings::normaliseLink($actor), 'rel' => [Contact::SHARING, Contact::FRIEND],
1149 'network' => $networks, 'archive' => false, 'pending' => false, 'uid' => $contact['uid']];
1151 // Forum posts are only accepted from forum contacts
1152 if ($contact['contact-type'] == Contact::TYPE_COMMUNITY) {
1153 $condition['rel'] = [Contact::SHARING, Contact::FRIEND, Contact::FOLLOWER];
1156 if (!DBA::exists('contact', $condition)) {
1161 $type = $receivers[$contact['uid']]['type'] ?? self::TARGET_UNKNOWN;
1162 if (in_array($type, [self::TARGET_UNKNOWN, self::TARGET_FOLLOWER, self::TARGET_ANSWER, self::TARGET_GLOBAL])) {
1165 $type = self::TARGET_TO;
1168 $type = self::TARGET_CC;
1171 $type = self::TARGET_BTO;
1174 $type = self::TARGET_BCC;
1177 $type = self::TARGET_AUDIENCE;
1181 $receivers[$contact['uid']] = ['uid' => $contact['uid'], 'type' => $type];
1186 if (!empty($reply) && (!empty($receivers[0]) || !empty($receivers[-1]))) {
1187 $parents = Post::select(['uid'], DBA::mergeConditions(['uri' => $reply], ["`uid` != ?", 0]));
1188 while ($parent = Post::fetch($parents)) {
1189 $receivers[$parent['uid']] = ['uid' => $parent['uid'], 'type' => self::TARGET_ANSWER];
1191 DBA::close($parents);
1194 self::switchContacts($receivers, $actor);
1196 // "birdsitelive" is a service that mirrors tweets into the fediverse
1197 // These posts can be fetched without authentication, but are not marked as public
1198 // We treat them as unlisted posts to be able to handle them.
1199 if (empty($receivers) && $fetch_unlisted && Contact::isPlatform($actor, 'birdsitelive')) {
1200 $receivers[0] = ['uid' => 0, 'type' => self::TARGET_GLOBAL];
1201 $receivers[-1] = ['uid' => -1, 'type' => self::TARGET_GLOBAL];
1202 Logger::notice('Post from "birdsitelive" is set to "unlisted"', ['id' => JsonLD::fetchElement($activity, '@id')]);
1203 } elseif (empty($receivers)) {
1204 Logger::notice('Post has got no receivers', ['fetch_unlisted' => $fetch_unlisted, 'actor' => $actor, 'id' => JsonLD::fetchElement($activity, '@id'), 'type' => JsonLD::fetchElement($activity, '@type')]);
1211 * Fetch the receiver list of a given actor
1213 * @param string $actor
1214 * @param array $tags
1215 * @param array $receivers
1216 * @param integer $target_type
1217 * @param array $profile
1219 * @return array with receivers (user id)
1220 * @throws \Exception
1222 private static function getReceiverForActor(string $actor, array $tags, array $receivers, int $target_type, array $profile): array
1224 $basecondition = ['rel' => [Contact::SHARING, Contact::FRIEND, Contact::FOLLOWER],
1225 'network' => Protocol::FEDERATED, 'archive' => false, 'pending' => false];
1227 if (!empty($profile['uri-id'])) {
1228 $condition = DBA::mergeConditions($basecondition, ["`uri-id` = ? AND `uid` != ?", $profile['uri-id'], 0]);
1229 $contacts = DBA::select('contact', ['uid', 'rel'], $condition);
1230 while ($contact = DBA::fetch($contacts)) {
1231 if (empty($receivers[$contact['uid']]) && self::isValidReceiverForActor($contact, $tags)) {
1232 $receivers[$contact['uid']] = ['uid' => $contact['uid'], 'type' => $target_type];
1235 DBA::close($contacts);
1237 // This part will only be called while post update 1426 wasn't finished
1238 $condition = DBA::mergeConditions($basecondition, ["`nurl` = ? AND `uid` != ?", Strings::normaliseLink($actor), 0]);
1239 $contacts = DBA::select('contact', ['uid', 'rel'], $condition);
1240 while ($contact = DBA::fetch($contacts)) {
1241 if (empty($receivers[$contact['uid']]) && self::isValidReceiverForActor($contact, $tags)) {
1242 $receivers[$contact['uid']] = ['uid' => $contact['uid'], 'type' => $target_type];
1245 DBA::close($contacts);
1247 // The queries are split because of performance issues
1248 $condition = DBA::mergeConditions($basecondition, ["`alias` IN (?, ?) AND `uid` != ?", Strings::normaliseLink($actor), $actor, 0]);
1249 $contacts = DBA::select('contact', ['uid', 'rel'], $condition);
1250 while ($contact = DBA::fetch($contacts)) {
1251 if (empty($receivers[$contact['uid']]) && self::isValidReceiverForActor($contact, $tags)) {
1252 $receivers[$contact['uid']] = ['uid' => $contact['uid'], 'type' => $target_type];
1255 DBA::close($contacts);
1261 * Tests if the contact is a valid receiver for this actor
1263 * @param array $contact
1264 * @param array $tags
1266 * @return bool with receivers (user id)
1267 * @throws \Exception
1269 private static function isValidReceiverForActor(array $contact, array $tags): bool
1271 // Are we following the contact? Then this is a valid receiver
1272 if (in_array($contact['rel'], [Contact::SHARING, Contact::FRIEND])) {
1276 // When the possible receiver isn't a community, then it is no valid receiver
1277 $owner = User::getOwnerDataById($contact['uid']);
1278 if (empty($owner) || ($owner['contact-type'] != Contact::TYPE_COMMUNITY)) {
1282 // Is the community account tagged?
1283 foreach ($tags as $tag) {
1284 if ($tag['type'] != 'Mention') {
1288 if (Strings::compareLink($tag['href'], $owner['url'])) {
1297 * Switches existing contacts to ActivityPub
1299 * @param integer $cid Contact ID
1300 * @param integer $uid User ID
1301 * @param string $url Profile URL
1303 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1304 * @throws \ImagickException
1306 public static function switchContact(int $cid, int $uid, string $url)
1308 if (DBA::exists('contact', ['id' => $cid, 'network' => Protocol::ACTIVITYPUB])) {
1309 Logger::info('Contact is already ActivityPub', ['id' => $cid, 'uid' => $uid, 'url' => $url]);
1313 if (Contact::updateFromProbe($cid)) {
1314 Logger::info('Update was successful', ['id' => $cid, 'uid' => $uid, 'url' => $url]);
1317 // Send a new follow request to be sure that the connection still exists
1318 if (($uid != 0) && DBA::exists('contact', ['id' => $cid, 'rel' => [Contact::SHARING, Contact::FRIEND], 'network' => Protocol::ACTIVITYPUB])) {
1319 Logger::info('Contact had been switched to ActivityPub. Sending a new follow request.', ['uid' => $uid, 'url' => $url]);
1320 ActivityPub\Transmitter::sendActivity('Follow', $url, $uid);
1325 * @TODO Fix documentation and type-hints
1330 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1331 * @throws \ImagickException
1333 private static function switchContacts($receivers, $actor)
1335 if (empty($actor)) {
1339 foreach ($receivers as $receiver) {
1340 $contact = DBA::selectFirst('contact', ['id'], ['uid' => $receiver['uid'], 'network' => Protocol::OSTATUS, 'nurl' => Strings::normaliseLink($actor)]);
1341 if (DBA::isResult($contact)) {
1342 self::switchContact($contact['id'], $receiver['uid'], $actor);
1345 $contact = DBA::selectFirst('contact', ['id'], ['uid' => $receiver['uid'], 'network' => Protocol::OSTATUS, 'alias' => [Strings::normaliseLink($actor), $actor]]);
1346 if (DBA::isResult($contact)) {
1347 self::switchContact($contact['id'], $receiver['uid'], $actor);
1353 * @TODO Fix documentation and type-hints
1355 * @param $object_data
1356 * @param array $activity
1360 private static function addActivityFields($object_data, array $activity)
1362 if (!empty($activity['published']) && empty($object_data['published'])) {
1363 $object_data['published'] = JsonLD::fetchElement($activity, 'as:published', '@value');
1366 if (!empty($activity['diaspora:guid']) && empty($object_data['diaspora:guid'])) {
1367 $object_data['diaspora:guid'] = JsonLD::fetchElement($activity, 'diaspora:guid', '@value');
1370 $object_data['service'] = JsonLD::fetchElement($activity, 'as:instrument', 'as:name', '@type', 'as:Service');
1371 $object_data['service'] = JsonLD::fetchElement($object_data, 'service', '@value');
1373 if (!empty($object_data['object_id'])) {
1374 // Some systems (e.g. GNU Social) don't reply to the "id" field but the "uri" field.
1375 $objectId = Item::getURIByLink($object_data['object_id']);
1376 if (!empty($objectId) && ($object_data['object_id'] != $objectId)) {
1377 Logger::notice('Fix wrong object-id', ['received' => $object_data['object_id'], 'correct' => $objectId]);
1378 $object_data['object_id'] = $objectId;
1382 return $object_data;
1386 * Fetches the object data from external resources if needed
1388 * @param string $object_id Object ID of the provided object
1389 * @param array $object The provided object array
1390 * @param boolean $trust_source Do we trust the provided object?
1391 * @param integer $uid User ID for the signature that we use to fetch data
1393 * @return array|false with trusted and valid object data
1394 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1395 * @throws \ImagickException
1397 private static function fetchObject(string $object_id, array $object = [], bool $trust_source = false, int $uid = 0)
1399 // By fetching the type we check if the object is complete.
1400 $type = JsonLD::fetchElement($object, '@type');
1402 if (!$trust_source || empty($type)) {
1403 $data = Processor::fetchCachedActivity($object_id, $uid);
1404 if (!empty($data)) {
1405 $object = JsonLD::compact($data);
1406 Logger::info('Fetched content for ' . $object_id);
1408 Logger::info('Empty content for ' . $object_id . ', check if content is available locally.');
1410 $item = Post::selectFirst(Item::DELIVER_FIELDLIST, ['uri' => $object_id]);
1411 if (!DBA::isResult($item)) {
1412 Logger::info('Object with url ' . $object_id . ' was not found locally.');
1415 Logger::info('Using already stored item for url ' . $object_id);
1416 $data = ActivityPub\Transmitter::createNote($item);
1417 $object = JsonLD::compact($data);
1420 $id = JsonLD::fetchElement($object, '@id');
1422 Logger::info('Empty id');
1426 if ($id != $object_id) {
1427 Logger::info('Fetched id differs from provided id', ['provided' => $object_id, 'fetched' => $id]);
1431 Logger::info('Using original object for url ' . $object_id);
1434 $type = JsonLD::fetchElement($object, '@type');
1436 Logger::info('Empty type');
1440 // Lemmy is resharing "create" activities instead of content
1441 // We fetch the content from the activity.
1442 if (in_array($type, ['as:Create'])) {
1443 $object = $object['as:object'];
1444 $type = JsonLD::fetchElement($object, '@type');
1446 Logger::info('Empty type');
1449 $object_data = self::processObject($object);
1452 // We currently don't handle 'pt:CacheFile', but with this step we avoid logging
1453 if (in_array($type, self::CONTENT_TYPES) || ($type == 'pt:CacheFile')) {
1454 $object_data = self::processObject($object);
1456 if (!empty($data)) {
1457 $object_data['raw-object'] = json_encode($data);
1459 return $object_data;
1462 Logger::info('Unhandled object type: ' . $type);
1467 * Converts the language element (Used by Peertube)
1469 * @param array $languages
1470 * @return array Languages
1472 public static function processLanguages(array $languages): array
1474 if (empty($languages)) {
1478 $language_list = [];
1480 foreach ($languages as $language) {
1481 if (!empty($language['_:identifier']) && !empty($language['as:name'])) {
1482 $language_list[$language['_:identifier']] = $language['as:name'];
1485 return $language_list;
1489 * Convert tags from JSON-LD format into a simplified format
1491 * @param array $tags Tags in JSON-LD format
1493 * @return array with tags in a simplified format
1495 public static function processTags(array $tags): array
1499 foreach ($tags as $tag) {
1504 $element = ['type' => str_replace('as:', '', JsonLD::fetchElement($tag, '@type') ?? ''),
1505 'href' => JsonLD::fetchElement($tag, 'as:href', '@id'),
1506 'name' => JsonLD::fetchElement($tag, 'as:name', '@value')];
1508 if (empty($element['type'])) {
1512 if (empty($element['href'])) {
1513 $element['href'] = $element['name'];
1516 $taglist[] = $element;
1522 * Convert emojis from JSON-LD format into a simplified format
1524 * @param array $emojis
1525 * @return array with emojis in a simplified format
1527 private static function processEmojis(array $emojis): array
1531 foreach ($emojis as $emoji) {
1532 if (empty($emoji) || (JsonLD::fetchElement($emoji, '@type') != 'toot:Emoji') || empty($emoji['as:icon'])) {
1536 $url = JsonLD::fetchElement($emoji['as:icon'], 'as:url', '@id');
1537 $element = ['name' => JsonLD::fetchElement($emoji, 'as:name', '@value'),
1540 $emojilist[] = $element;
1547 * Convert attachments from JSON-LD format into a simplified format
1549 * @param array $attachments Attachments in JSON-LD format
1551 * @return array Attachments in a simplified format
1553 private static function processAttachments(array $attachments): array
1557 // Removes empty values
1558 $attachments = array_filter($attachments);
1560 foreach ($attachments as $attachment) {
1561 switch (JsonLD::fetchElement($attachment, '@type')) {
1566 $urls = JsonLD::fetchElementArray($attachment, 'as:url');
1567 foreach ($urls as $url) {
1568 // Single scalar URL case
1569 if (is_string($url)) {
1574 $href = JsonLD::fetchElement($url, 'as:href', '@id');
1575 $mediaType = JsonLD::fetchElement($url, 'as:mediaType', '@value');
1576 if (Strings::startsWith($mediaType, 'image')) {
1585 'title' => JsonLD::fetchElement($attachment, 'as:name', '@value'),
1586 'desc' => JsonLD::fetchElement($attachment, 'as:summary', '@value'),
1588 'image' => $pageImage,
1592 $mediaType = JsonLD::fetchElement($attachment, 'as:mediaType', '@value');
1593 $imageFullUrl = JsonLD::fetchElement($attachment, 'as:url', '@id');
1594 $imagePreviewUrl = null;
1596 if (!$imageFullUrl && ($urls = JsonLD::fetchElementArray($attachment, 'as:url'))) {
1597 $imageVariants = [];
1598 $previewVariants = [];
1599 foreach ($urls as $url) {
1600 // Scalar URL, no discrimination possible
1601 if (is_string($url)) {
1602 $imageFullUrl = $url;
1606 // Not sure what to do with a different Link media type than the base Image, we skip
1607 if ($mediaType != JsonLD::fetchElement($url, 'as:mediaType', '@value')) {
1611 $href = JsonLD::fetchElement($url, 'as:href', '@id');
1613 // Default URL choice if no discriminating width is provided
1614 $imageFullUrl = $href ?? $imageFullUrl;
1616 $width = intval(JsonLD::fetchElement($url, 'as:width', '@value') ?? 1);
1618 if ($href && $width) {
1619 $imageVariants[$width] = $href;
1620 // 632 is the ideal width for full screen frio posts, we compute the absolute distance to it
1621 $previewVariants[abs(632 - $width)] = $href;
1625 if ($imageVariants) {
1626 // Taking the maximum size image
1627 ksort($imageVariants);
1628 $imageFullUrl = array_pop($imageVariants);
1630 // Taking the minimum number distance to the target distance
1631 ksort($previewVariants);
1632 $imagePreviewUrl = array_shift($previewVariants);
1635 unset($imageVariants);
1636 unset($previewVariants);
1640 'type' => str_replace('as:', '', JsonLD::fetchElement($attachment, '@type')),
1641 'mediaType' => $mediaType,
1642 'name' => JsonLD::fetchElement($attachment, 'as:name', '@value'),
1643 'url' => $imageFullUrl,
1644 'image' => $imagePreviewUrl !== $imageFullUrl ? $imagePreviewUrl : null,
1649 'type' => str_replace('as:', '', JsonLD::fetchElement($attachment, '@type')),
1650 'mediaType' => JsonLD::fetchElement($attachment, 'as:mediaType', '@value'),
1651 'name' => JsonLD::fetchElement($attachment, 'as:name', '@value'),
1652 'url' => JsonLD::fetchElement($attachment, 'as:url', '@id') ?? JsonLD::fetchElement($attachment, 'as:href', '@id'),
1653 'height' => JsonLD::fetchElement($attachment, 'as:height', '@value'),
1654 'width' => JsonLD::fetchElement($attachment, 'as:width', '@value'),
1655 'image' => JsonLD::fetchElement($attachment, 'as:image', '@id')
1664 * Convert questions from JSON-LD format into a simplified format
1666 * @param array $object
1668 * @return array Questions in a simplified format
1670 private static function processQuestion(array $object): array
1674 if (!empty($object['as:oneOf'])) {
1675 $question['multiple'] = false;
1676 $options = JsonLD::fetchElementArray($object, 'as:oneOf') ?? [];
1677 } elseif (!empty($object['as:anyOf'])) {
1678 $question['multiple'] = true;
1679 $options = JsonLD::fetchElementArray($object, 'as:anyOf') ?? [];
1684 $closed = JsonLD::fetchElement($object, 'as:closed', '@value');
1685 if (!empty($closed)) {
1686 $question['end-time'] = $closed;
1688 $question['end-time'] = JsonLD::fetchElement($object, 'as:endTime', '@value');
1691 $question['voters'] = (int)JsonLD::fetchElement($object, 'toot:votersCount', '@value');
1692 $question['options'] = [];
1696 foreach ($options as $option) {
1697 if (JsonLD::fetchElement($option, '@type') != 'as:Note') {
1701 $name = JsonLD::fetchElement($option, 'as:name', '@value');
1703 if (empty($option['as:replies'])) {
1707 $replies = JsonLD::fetchElement($option['as:replies'], 'as:totalItems', '@value');
1709 $question['options'][] = ['name' => $name, 'replies' => $replies];
1711 $voters += (int)$replies;
1714 // For single choice question we can count the number of voters if not provided (like with Misskey)
1715 if (empty($question['voters']) && !$question['multiple']) {
1716 $question['voters'] = $voters;
1723 * Fetch the original source or content with the "language" Markdown or HTML
1725 * @param array $object
1726 * @param array $object_data
1728 * @return array Object data (?)
1729 * @throws \Exception
1731 private static function getSource(array $object, array $object_data): array
1733 $object_data['source'] = JsonLD::fetchElement($object, 'as:source', 'as:content', 'as:mediaType', 'text/bbcode');
1734 $object_data['source'] = JsonLD::fetchElement($object_data, 'source', '@value');
1735 if (!empty($object_data['source'])) {
1736 return $object_data;
1739 $object_data['source'] = JsonLD::fetchElement($object, 'as:source', 'as:content', 'as:mediaType', 'text/markdown');
1740 $object_data['source'] = JsonLD::fetchElement($object_data, 'source', '@value');
1741 if (!empty($object_data['source'])) {
1742 $object_data['source'] = Markdown::toBBCode($object_data['source']);
1743 return $object_data;
1746 $object_data['source'] = JsonLD::fetchElement($object, 'as:source', 'as:content', 'as:mediaType', 'text/html');
1747 $object_data['source'] = JsonLD::fetchElement($object_data, 'source', '@value');
1748 if (!empty($object_data['source'])) {
1749 $object_data['source'] = HTML::toBBCode($object_data['source']);
1750 return $object_data;
1753 return $object_data;
1757 * Extracts a potential alternate URL from a list of additional URL elements
1759 * @param array $urls
1762 private static function extractAlternateUrl(array $urls): string
1765 foreach ($urls as $key => $url) {
1766 // Not a list but a single URL element
1767 if (!is_numeric($key)) {
1771 if (empty($url['@type']) || ($url['@type'] != 'as:Link')) {
1775 $href = JsonLD::fetchElement($url, 'as:href', '@id');
1780 $mediatype = JsonLD::fetchElement($url, 'as:mediaType');
1781 if (empty($mediatype)) {
1785 if ($mediatype == 'text/html') {
1786 $alternateUrl = $href;
1790 return $alternateUrl;
1794 * Check if the "as:url" element is an array with multiple links
1795 * This is the case with audio and video posts.
1796 * Then the links are added as attachments
1798 * @param array $urls The object URL list
1799 * @return array an array of attachments
1801 private static function processAttachmentUrls(array $urls): array
1804 foreach ($urls as $key => $url) {
1805 // Not a list but a single URL element
1806 if (!is_numeric($key)) {
1810 if (empty($url['@type']) || ($url['@type'] != 'as:Link')) {
1814 $href = JsonLD::fetchElement($url, 'as:href', '@id');
1819 $mediatype = JsonLD::fetchElement($url, 'as:mediaType');
1820 if (empty($mediatype)) {
1824 $filetype = strtolower(substr($mediatype, 0, strpos($mediatype, '/')));
1826 if ($filetype == 'audio') {
1827 $attachments[] = ['type' => $filetype, 'mediaType' => $mediatype, 'url' => $href, 'height' => null, 'size' => null, 'name' => ''];
1828 } elseif ($filetype == 'video') {
1829 $height = (int)JsonLD::fetchElement($url, 'as:height', '@value');
1830 // PeerTube audio-only track
1831 if ($height === 0) {
1835 $size = (int)JsonLD::fetchElement($url, 'pt:size', '@value');
1836 $attachments[] = ['type' => $filetype, 'mediaType' => $mediatype, 'url' => $href, 'height' => $height, 'size' => $size, 'name' => ''];
1837 } elseif (in_array($mediatype, ['application/x-bittorrent', 'application/x-bittorrent;x-scheme-handler/magnet'])) {
1838 $height = (int)JsonLD::fetchElement($url, 'as:height', '@value');
1840 // For Torrent links we always store the highest resolution
1841 if (!empty($attachments[$mediatype]['height']) && ($height < $attachments[$mediatype]['height'])) {
1845 $attachments[$mediatype] = ['type' => $mediatype, 'mediaType' => $mediatype, 'url' => $href, 'height' => $height, 'size' => null, 'name' => ''];
1846 } elseif ($mediatype == 'application/x-mpegURL') {
1847 // PeerTube exception, actual video link is in the tags of this URL element
1848 $attachments = array_merge($attachments, self::processAttachmentUrls($url['as:tag']));
1852 return array_values($attachments);
1856 * Fetches data from the object part of an activity
1858 * @param array $object
1860 * @return array|bool Object data or FALSE if $object does not contain @id element
1861 * @throws \Exception
1863 private static function processObject(array $object)
1865 if (!JsonLD::fetchElement($object, '@id')) {
1869 $object_data = self::getObjectDataFromActivity($object);
1871 $receiverdata = self::getReceivers($object, $object_data['actor'] ?? '', $object_data['tags'], true, false);
1872 $receivers = $reception_types = [];
1873 foreach ($receiverdata as $key => $data) {
1874 $receivers[$key] = $data['uid'];
1875 $reception_types[$data['uid']] = $data['type'] ?? 0;
1878 $object_data['receiver_urls'] = self::getReceiverURL($object);
1879 $object_data['receiver'] = $receivers;
1880 $object_data['reception_type'] = $reception_types;
1882 $object_data['unlisted'] = in_array(-1, $object_data['receiver']);
1883 unset($object_data['receiver'][-1]);
1884 unset($object_data['reception_type'][-1]);
1886 return $object_data;
1890 * Create an object data array from a given activity
1892 * @param array $object
1894 * @return array Object data
1896 public static function getObjectDataFromActivity(array $object): array
1899 $object_data['object_type'] = JsonLD::fetchElement($object, '@type');
1900 $object_data['id'] = JsonLD::fetchElement($object, '@id');
1901 $object_data['reply-to-id'] = JsonLD::fetchElement($object, 'as:inReplyTo', '@id');
1903 // An empty "id" field is translated to "./" by the compactor, so we have to check for this content
1904 if (empty($object_data['reply-to-id']) || ($object_data['reply-to-id'] == './')) {
1905 $object_data['reply-to-id'] = $object_data['id'];
1907 // On activities the "reply to" is the id of the object it refers to
1908 if (in_array($object_data['object_type'], array_merge(self::ACTIVITY_TYPES, ['as:Announce']))) {
1909 $object_id = JsonLD::fetchElement($object, 'as:object', '@id');
1910 if (!empty($object_id)) {
1911 $object_data['reply-to-id'] = $object_id;
1915 // Some systems (e.g. GNU Social) don't reply to the "id" field but the "uri" field.
1916 $replyToId = Item::getURIByLink($object_data['reply-to-id']);
1917 if (!empty($replyToId) && ($object_data['reply-to-id'] != $replyToId)) {
1918 Logger::notice('Fix wrong reply-to', ['received' => $object_data['reply-to-id'], 'correct' => $replyToId]);
1919 $object_data['reply-to-id'] = $replyToId;
1923 $object_data['published'] = JsonLD::fetchElement($object, 'as:published', '@value');
1924 $object_data['updated'] = JsonLD::fetchElement($object, 'as:updated', '@value');
1926 if (empty($object_data['updated'])) {
1927 $object_data['updated'] = $object_data['published'];
1930 if (empty($object_data['published']) && !empty($object_data['updated'])) {
1931 $object_data['published'] = $object_data['updated'];
1934 $actor = JsonLD::fetchElement($object, 'as:attributedTo', '@id');
1935 if (empty($actor)) {
1936 $actor = JsonLD::fetchElement($object, 'as:actor', '@id');
1939 $location = JsonLD::fetchElement($object, 'as:location', 'as:name', '@type', 'as:Place');
1940 $location = JsonLD::fetchElement($location, 'location', '@value');
1942 // Some AP software allow formatted text in post location, so we run all the text converters we have to boil
1943 // down to HTML and then finally format to plaintext.
1944 $location = Markdown::convert($location);
1945 $location = BBCode::toPlaintext($location);
1948 $object_data['sc:identifier'] = JsonLD::fetchElement($object, 'sc:identifier', '@value');
1949 $object_data['diaspora:guid'] = JsonLD::fetchElement($object, 'diaspora:guid', '@value');
1950 $object_data['diaspora:comment'] = JsonLD::fetchElement($object, 'diaspora:comment', '@value');
1951 $object_data['diaspora:like'] = JsonLD::fetchElement($object, 'diaspora:like', '@value');
1952 $object_data['actor'] = $object_data['author'] = $actor;
1953 $element = JsonLD::fetchElement($object, 'as:context', '@id');
1954 $object_data['context'] = $element != './' ? $element : null;
1955 $element = JsonLD::fetchElement($object, 'ostatus:conversation', '@id');
1956 $object_data['conversation'] = $element != './' ? $element : null;
1957 $object_data['sensitive'] = JsonLD::fetchElement($object, 'as:sensitive');
1958 $object_data['name'] = JsonLD::fetchElement($object, 'as:name', '@value');
1959 $object_data['summary'] = JsonLD::fetchElement($object, 'as:summary', '@value');
1960 $object_data['content'] = JsonLD::fetchElement($object, 'as:content', '@value');
1961 $object_data['mediatype'] = JsonLD::fetchElement($object, 'as:mediaType', '@value');
1962 $object_data = self::getSource($object, $object_data);
1963 $object_data['start-time'] = JsonLD::fetchElement($object, 'as:startTime', '@value');
1964 $object_data['end-time'] = JsonLD::fetchElement($object, 'as:endTime', '@value');
1965 $object_data['location'] = $location;
1966 $object_data['latitude'] = JsonLD::fetchElement($object, 'as:location', 'as:latitude', '@type', 'as:Place');
1967 $object_data['latitude'] = JsonLD::fetchElement($object_data, 'latitude', '@value');
1968 $object_data['longitude'] = JsonLD::fetchElement($object, 'as:location', 'as:longitude', '@type', 'as:Place');
1969 $object_data['longitude'] = JsonLD::fetchElement($object_data, 'longitude', '@value');
1970 $object_data['attachments'] = self::processAttachments(JsonLD::fetchElementArray($object, 'as:attachment') ?? []);
1971 $object_data['tags'] = self::processTags(JsonLD::fetchElementArray($object, 'as:tag') ?? []);
1972 $object_data['emojis'] = self::processEmojis(JsonLD::fetchElementArray($object, 'as:tag', null, '@type', 'toot:Emoji') ?? []);
1973 $object_data['languages'] = self::processLanguages(JsonLD::fetchElementArray($object, 'sc:inLanguage') ?? []);
1974 $object_data['generator'] = JsonLD::fetchElement($object, 'as:generator', 'as:name', '@type', 'as:Application');
1975 $object_data['generator'] = JsonLD::fetchElement($object_data, 'generator', '@value');
1976 $object_data['alternate-url'] = JsonLD::fetchElement($object, 'as:url', '@id');
1978 // Special treatment for Hubzilla links
1979 if (is_array($object_data['alternate-url'])) {
1980 $object_data['alternate-url'] = JsonLD::fetchElement($object_data['alternate-url'], 'as:href', '@id');
1982 if (!is_string($object_data['alternate-url'])) {
1983 $object_data['alternate-url'] = JsonLD::fetchElement($object['as:url'], 'as:href', '@id');
1987 if (!empty($object_data['alternate-url']) && !Network::isValidHttpUrl($object_data['alternate-url'])) {
1988 $object_data['alternate-url'] = null;
1991 if (in_array($object_data['object_type'], ['as:Audio', 'as:Video'])) {
1992 $object_data['alternate-url'] = self::extractAlternateUrl($object['as:url'] ?? []) ?: $object_data['alternate-url'];
1993 $object_data['attachments'] = array_merge($object_data['attachments'], self::processAttachmentUrls($object['as:url'] ?? []));
1996 // Support for quoted posts (Pleroma, Fedibird and Misskey)
1997 $object_data['quote-url'] = JsonLD::fetchElement($object, 'as:quoteUrl', '@value');
1998 if (empty($object_data['quote-url'])) {
1999 $object_data['quote-url'] = JsonLD::fetchElement($object, 'fedibird:quoteUri', '@value');
2001 if (empty($object_data['quote-url'])) {
2002 $object_data['quote-url'] = JsonLD::fetchElement($object, 'misskey:_misskey_quote', '@value');
2005 // Misskey adds some data to the standard "content" value for quoted posts for backwards compatibility.
2006 // Their own "_misskey_content" value does then contain the content without this extra data.
2007 if (!empty($object_data['quote-url'])) {
2008 $misskey_content = JsonLD::fetchElement($object, 'misskey:_misskey_content', '@value');
2009 if (!empty($misskey_content)) {
2010 $object_data['content'] = $misskey_content;
2014 // For page types we expect that the alternate url posts to some page.
2015 // So we add this to the attachments if it differs from the id.
2016 // Currently only Lemmy is using the page type.
2017 if (($object_data['object_type'] == 'as:Page') && !empty($object_data['alternate-url']) && !Strings::compareLink($object_data['alternate-url'], $object_data['id'])) {
2018 $object_data['attachments'][] = ['url' => $object_data['alternate-url']];
2019 $object_data['alternate-url'] = null;
2022 if ($object_data['object_type'] == 'as:Question') {
2023 $object_data['question'] = self::processQuestion($object);
2026 return $object_data;
2030 * Add an object id to the list of arrived activities
2036 private static function addArrivedId(string $id)
2038 DBA::delete('arrived-activity', ["`received` < ?", DateTimeFormat::utc('now - 5 minutes')]);
2039 DBA::insert('arrived-activity', ['object-id' => $id, 'received' => DateTimeFormat::utcNow()], Database::INSERT_IGNORE);
2043 * Checks if the given object already arrived before
2049 private static function hasArrived(string $id): bool
2051 return DBA::exists('arrived-activity', ['object-id' => $id]);