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' => [GRAVITY_PARENT, 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 Logger::info('Processing ' . $object_data['type'] . ' ' . $object_data['object_type'] . ' ' . $object_data['id']);
521 * Fetches the first user id from the receiver array
523 * @param array $receivers Array with receivers
524 * @return integer user id;
526 public static function getFirstUserFromReceivers(array $receivers): int
528 foreach ($receivers as $receiver) {
529 if (!empty($receiver)) {
537 * Processes the activity object
539 * @param array $activity Array with activity data
540 * @param string $body The unprocessed body
541 * @param int|null $uid User ID
542 * @param boolean $trust_source Do we trust the source?
543 * @param boolean $push Message had been pushed to our system
544 * @param array $signer The signer of the post
548 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
549 * @throws \ImagickException
551 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
553 $type = JsonLD::fetchElement($activity, '@type');
555 Logger::info('Empty type', ['activity' => $activity]);
559 if (!JsonLD::fetchElement($activity, 'as:object', '@id')) {
560 Logger::info('Empty object', ['activity' => $activity]);
564 $actor = JsonLD::fetchElement($activity, 'as:actor', '@id');
566 Logger::info('Empty actor', ['activity' => $activity]);
570 if (is_array($activity['as:object'])) {
571 $attributed_to = JsonLD::fetchElement($activity['as:object'], 'as:attributedTo', '@id');
576 // Test the provided signatures against the actor and "attributedTo"
578 if (!empty($attributed_to) && !empty($actor)) {
579 $trust_source = (in_array($actor, $signer) && in_array($attributed_to, $signer));
581 $trust_source = in_array($actor, $signer);
585 // $trust_source is called by reference and is set to true if the content was retrieved successfully
586 $object_data = self::prepareObjectData($activity, $uid, $push, $trust_source);
587 if (empty($object_data)) {
588 Logger::info('No object data found', ['activity' => $activity]);
592 // Lemmy is announcing activities.
593 // We are changing the announces into regular activities.
594 if (($type == 'as:Announce') && in_array($object_data['type'] ?? '', array_merge(self::ACTIVITY_TYPES, ['as:Delete', 'as:Undo', 'as:Update']))) {
595 Logger::debug('Change type of announce to activity', ['type' => $object_data['type']]);
596 $type = $object_data['type'];
599 if (!empty($body) && empty($object_data['raw'])) {
600 $object_data['raw'] = $body;
603 // Internal flag for thread completion. See Processor.php
604 if (!empty($activity['thread-completion'])) {
605 $object_data['thread-completion'] = $activity['thread-completion'];
608 if (!empty($activity['completion-mode'])) {
609 $object_data['completion-mode'] = $activity['completion-mode'];
612 if (!empty($activity['thread-children-type'])) {
613 $object_data['thread-children-type'] = $activity['thread-children-type'];
616 // Internal flag for posts that arrived via relay
617 if (!empty($activity['from-relay'])) {
618 $object_data['from-relay'] = $activity['from-relay'];
621 if ($type == 'as:Announce') {
622 $object_data['object_activity'] = $activity;
625 if (($type == 'as:Create') && $trust_source) {
626 if (self::hasArrived($object_data['object_id'])) {
627 Logger::info('The activity already arrived.', ['id' => $object_data['object_id']]);
630 self::addArrivedId($object_data['object_id']);
632 if (Queue::exists($object_data['object_id'], $type)) {
633 Logger::info('The activity is already added.', ['id' => $object_data['object_id']]);
638 if (DI::config()->get('system', 'decoupled_receiver') && ($trust_source || DI::config()->get('debug', 'ap_inbox_store_untrusted'))) {
639 $object_data = Queue::add($object_data, $type, $uid, $http_signer, $push, $trust_source);
642 if (!$trust_source) {
643 Logger::info('Activity trust could not be achieved.', ['id' => $object_data['object_id'], 'type' => $type, 'signer' => $signer, 'actor' => $actor, 'attributedTo' => $attributed_to]);
647 if (!empty($object_data['entry-id']) && DI::config()->get('system', 'decoupled_receiver') && ($push || ($completion == self::COMPLETION_RELAY))) {
648 if (Queue::isProcessable($object_data['entry-id'])) {
649 // We delay by 5 seconds to allow to accumulate all receivers
650 $delayed = date(DateTimeFormat::MYSQL, time() + 5);
651 Logger::debug('Initiate processing', ['id' => $object_data['entry-id'], 'uri' => $object_data['object_id']]);
652 $wid = Worker::add(['priority' => PRIORITY_HIGH, 'delayed' => $delayed], 'ProcessQueue', $object_data['entry-id']);
653 Queue::setWorkerId($object_data['entry-id'], $wid);
655 Logger::debug('Other queue entries need to be processed first.', ['id' => $object_data['entry-id']]);
660 if (!empty($activity['recursion-depth'])) {
661 $object_data['recursion-depth'] = $activity['recursion-depth'];
664 if (in_array('as:Question', [$object_data['object_type'] ?? '', $object_data['object_object_type'] ?? ''])) {
665 self::storeUnhandledActivity(false, $type, $object_data, $activity, $body, $uid, $trust_source, $push, $signer);
668 if (!self::routeActivities($object_data, $type, $push)) {
669 self::storeUnhandledActivity(true, $type, $object_data, $activity, $body, $uid, $trust_source, $push, $signer);
670 Queue::remove($object_data);
678 * @param array $object_data
679 * @param string $type
681 * @param bool $fetch_parents
683 * @return boolean Could the activity be routed?
685 public static function routeActivities(array $object_data, string $type, bool $push, bool $fetch_parents = true): bool
687 $activity = $object_data['object_activity'] ?? [];
691 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
692 $item = ActivityPub\Processor::createItem($object_data, $fetch_parents);
693 ActivityPub\Processor::postItem($object_data, $item);
694 } elseif (in_array($object_data['object_type'], ['pt:CacheFile'])) {
695 // Unhandled Peertube activity
696 Queue::remove($object_data);
703 if (in_array($object_data['object_type'], ['as:Event'])) {
704 $item = ActivityPub\Processor::createItem($object_data, $fetch_parents);
705 ActivityPub\Processor::postItem($object_data, $item);
712 if ($object_data['object_type'] == 'as:tag') {
713 ActivityPub\Processor::addTag($object_data);
714 } elseif (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
715 ActivityPub\Processor::addToFeaturedCollection($object_data);
716 } elseif ($object_data['object_type'] == '') {
717 // The object type couldn't be determined. We don't have it and we can't fetch it. We ignore this activity.
718 Queue::remove($object_data);
725 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
726 $actor = JsonLD::fetchElement($activity, 'as:actor', '@id');
727 $object_data['thread-completion'] = Contact::getIdForURL($actor);
728 $object_data['completion-mode'] = self::COMPLETION_ANNOUCE;
730 if (!Post::exists(['uri' => $object_data['id'], 'uid' => 0])) {
731 $item = ActivityPub\Processor::createItem($object_data, $fetch_parents);
733 Logger::debug('announced id was not created', ['id' => $object_data['id']]);
737 $item['post-reason'] = Item::PR_ANNOUNCEMENT;
738 ActivityPub\Processor::postItem($object_data, $item);
739 Logger::debug('Created announced id', ['id' => $object_data['id']]);
741 Logger::info('Announced id already exists', ['id' => $object_data['id']]);
742 Queue::remove($object_data);
745 if (!empty($activity)) {
746 $announce_object_data = self::processObject($activity);
747 $announce_object_data['name'] = $type;
748 $announce_object_data['author'] = $actor;
749 $announce_object_data['object_id'] = $object_data['id'];
750 $announce_object_data['object_type'] = $object_data['object_type'];
751 $announce_object_data['push'] = $push;
752 Logger::debug('Create announce activity', ['id' => $announce_object_data['id'], 'object_data' => $announce_object_data]);
754 if (!empty($object_data['raw'])) {
755 $announce_object_data['raw'] = $object_data['raw'];
757 if (!empty($object_data['raw-object'])) {
758 $announce_object_data['raw-object'] = $object_data['raw-object'];
760 ActivityPub\Processor::createActivity($announce_object_data, Activity::ANNOUNCE);
768 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
769 ActivityPub\Processor::createActivity($object_data, Activity::LIKE);
770 } elseif ($object_data['object_type'] == '') {
771 // The object type couldn't be determined. We don't have it and we can't fetch it. We ignore this activity.
772 Queue::remove($object_data);
779 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
780 ActivityPub\Processor::createActivity($object_data, Activity::DISLIKE);
781 } elseif ($object_data['object_type'] == '') {
782 // The object type couldn't be determined. We don't have it and we can't fetch it. We ignore this activity.
783 Queue::remove($object_data);
789 case 'as:TentativeAccept':
790 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
791 ActivityPub\Processor::createActivity($object_data, Activity::ATTENDMAYBE);
798 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
799 ActivityPub\Processor::updateItem($object_data);
800 } elseif (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
801 ActivityPub\Processor::updatePerson($object_data);
802 } elseif (in_array($object_data['object_type'], ['pt:CacheFile'])) {
803 // Unhandled Peertube activity
804 Queue::remove($object_data);
811 if (in_array($object_data['object_type'], array_merge(['as:Tombstone'], self::CONTENT_TYPES))) {
812 ActivityPub\Processor::deleteItem($object_data);
813 } elseif (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
814 ActivityPub\Processor::deletePerson($object_data);
815 } elseif ($object_data['object_type'] == '') {
816 // The object type couldn't be determined. Most likely we don't have it here. We ignore this activity.
817 Queue::remove($object_data);
824 if (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
825 ActivityPub\Processor::blockAccount($object_data);
832 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
833 ActivityPub\Processor::removeFromFeaturedCollection($object_data);
834 } elseif ($object_data['object_type'] == '') {
835 // The object type couldn't be determined. We don't have it and we can't fetch it. We ignore this activity.
836 Queue::remove($object_data);
843 if (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
844 ActivityPub\Processor::followUser($object_data);
845 } elseif (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
846 $object_data['reply-to-id'] = $object_data['object_id'];
847 ActivityPub\Processor::createActivity($object_data, Activity::FOLLOW);
854 if ($object_data['object_type'] == 'as:Follow') {
855 ActivityPub\Processor::acceptFollowUser($object_data);
856 } elseif (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
857 ActivityPub\Processor::createActivity($object_data, Activity::ATTEND);
864 if ($object_data['object_type'] == 'as:Follow') {
865 ActivityPub\Processor::rejectFollowUser($object_data);
866 } elseif (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
867 ActivityPub\Processor::createActivity($object_data, Activity::ATTENDNO);
874 if (($object_data['object_type'] == 'as:Follow') &&
875 in_array($object_data['object_object_type'], self::ACCOUNT_TYPES)) {
876 ActivityPub\Processor::undoFollowUser($object_data);
877 } elseif (($object_data['object_type'] == 'as:Follow') &&
878 in_array($object_data['object_object_type'], self::CONTENT_TYPES)) {
879 ActivityPub\Processor::undoActivity($object_data);
880 } elseif (($object_data['object_type'] == 'as:Accept') &&
881 in_array($object_data['object_object_type'], self::ACCOUNT_TYPES)) {
882 ActivityPub\Processor::rejectFollowUser($object_data);
883 } elseif (($object_data['object_type'] == 'as:Block') &&
884 in_array($object_data['object_object_type'], self::ACCOUNT_TYPES)) {
885 ActivityPub\Processor::unblockAccount($object_data);
886 } elseif (in_array($object_data['object_type'], array_merge(self::ACTIVITY_TYPES, ['as:Announce'])) &&
887 in_array($object_data['object_object_type'], array_merge(['as:Tombstone'], self::CONTENT_TYPES))) {
888 ActivityPub\Processor::undoActivity($object_data);
889 } elseif (in_array($object_data['object_type'], array_merge(self::ACTIVITY_TYPES, ['as:Announce', 'as:Create', ''])) &&
890 empty($object_data['object_object_type'])) {
891 // We cannot detect the target object. So we can ignore it.
892 Queue::remove($object_data);
893 } elseif (in_array($object_data['object_type'], ['as:Create']) &&
894 in_array($object_data['object_object_type'], ['pt:CacheFile'])) {
895 // Unhandled Peertube activity
896 Queue::remove($object_data);
903 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
904 ActivityPub\Processor::createActivity($object_data, Activity::VIEW);
905 } elseif ($object_data['object_type'] == '') {
906 // The object type couldn't be determined. Most likely we don't have it here. We ignore this activity.
907 Queue::remove($object_data);
913 case 'litepub:EmojiReact':
914 if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
915 ActivityPub\Processor::createActivity($object_data, Activity::EMOJIREACT);
916 } elseif ($object_data['object_type'] == '') {
917 // The object type couldn't be determined. We don't have it and we can't fetch it. We ignore this activity.
918 Queue::remove($object_data);
925 Logger::info('Unknown activity: ' . $type . ' ' . $object_data['object_type']);
932 * Stores unhandled or unknown Activities as a file
934 * @param boolean $unknown "true" if the activity is unknown, "false" if it is unhandled
935 * @param string $type Activity type
936 * @param array $object_data Preprocessed array that is generated out of the received activity
937 * @param array $activity Array with activity data
938 * @param string $body The unprocessed body
939 * @param integer $uid User ID
940 * @param boolean $trust_source Do we trust the source?
941 * @param boolean $push Message had been pushed to our system
942 * @param array $signer The signer of the post
945 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 = [])
947 if (!DI::config()->get('debug', 'ap_log_unknown')) {
951 $file = ($unknown ? 'unknown-' : 'unhandled-') . str_replace(':', '-', $type) . '-';
953 if (!empty($object_data['object_type'])) {
954 $file .= str_replace(':', '-', $object_data['object_type']) . '-';
957 if (!empty($object_data['object_object_type'])) {
958 $file .= str_replace(':', '-', $object_data['object_object_type']) . '-';
961 $tempfile = tempnam(System::getTempPath(), $file);
962 file_put_contents($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));
963 Logger::notice('Unknown activity stored', ['type' => $type, 'object_type' => $object_data['object_type'], $object_data['object_object_type'] ?? '', 'file' => $tempfile]);
967 * Fetch a user id from an activity array
969 * @param array $activity
970 * @param string $actor
972 * @return int user id
974 public static function getBestUserForActivity(array $activity): int
977 $actor = JsonLD::fetchElement($activity, 'as:actor', '@id') ?? '';
979 $receivers = self::getReceivers($activity, $actor);
980 foreach ($receivers as $receiver) {
981 if ($receiver['type'] == self::TARGET_GLOBAL) {
984 if (empty($uid) || ($receiver['type'] == self::TARGET_TO)) {
985 $uid = $receiver['uid'];
989 // When we haven't found any user yet, we just chose a user who most likely could have access to the content
991 $contact = Contact::selectFirst(['uid'], ['nurl' => Strings::normaliseLink($actor), 'rel' => [Contact::SHARING, Contact::FRIEND]]);
992 if (!empty($contact['uid'])) {
993 $uid = $contact['uid'];
1000 // @TODO Missing documentation
1001 public static function getReceiverURL(array $activity): array
1005 foreach (['as:to', 'as:cc', 'as:bto', 'as:bcc'] as $element) {
1006 $receiver_list = JsonLD::fetchElementArray($activity, $element, '@id');
1007 if (empty($receiver_list)) {
1011 foreach ($receiver_list as $receiver) {
1012 if ($receiver == self::PUBLIC_COLLECTION) {
1013 $receiver = ActivityPub::PUBLIC_COLLECTION;
1015 $urls[$element][] = $receiver;
1023 * Fetch the receiver list from an activity array
1025 * @param array $activity
1026 * @param string $actor
1027 * @param array $tags
1028 * @param boolean $fetch_unlisted
1030 * @return array with receivers (user id)
1031 * @throws \Exception
1033 private static function getReceivers(array $activity, string $actor, array $tags = [], bool $fetch_unlisted = false): array
1035 $reply = $receivers = $profile = [];
1037 // When it is an answer, we inherite the receivers from the parent
1038 $replyto = JsonLD::fetchElement($activity, 'as:inReplyTo', '@id');
1039 if (!empty($replyto)) {
1040 $reply = [$replyto];
1042 // Fix possibly wrong item URI (could be an answer to a plink uri)
1043 $fixedReplyTo = Item::getURIByLink($replyto);
1044 if (!empty($fixedReplyTo)) {
1045 $reply[] = $fixedReplyTo;
1049 // Fetch all posts that refer to the object id
1050 $object_id = JsonLD::fetchElement($activity, 'as:object', '@id');
1051 if (!empty($object_id)) {
1052 $reply[] = $object_id;
1055 if (!empty($reply)) {
1056 $parents = Post::select(['uid'], DBA::mergeConditions(['uri' => $reply], ["`uid` != ?", 0]));
1057 while ($parent = Post::fetch($parents)) {
1058 $receivers[$parent['uid']] = ['uid' => $parent['uid'], 'type' => self::TARGET_ANSWER];
1060 DBA::close($parents);
1063 if (!empty($actor)) {
1064 $profile = APContact::getByURL($actor);
1065 $followers = $profile['followers'] ?? '';
1066 $is_forum = ($actor['type'] ?? '') == 'Group';
1067 Logger::info('Got actor and followers', ['actor' => $actor, 'followers' => $followers]);
1069 Logger::info('Empty actor', ['activity' => $activity]);
1074 // We have to prevent false follower assumptions upon thread completions
1075 $follower_target = empty($activity['thread-completion']) ? self::TARGET_FOLLOWER : self::TARGET_UNKNOWN;
1077 foreach (['as:to', 'as:cc', 'as:bto', 'as:bcc'] as $element) {
1078 $receiver_list = JsonLD::fetchElementArray($activity, $element, '@id');
1079 if (empty($receiver_list)) {
1083 foreach ($receiver_list as $receiver) {
1084 if ($receiver == self::PUBLIC_COLLECTION) {
1085 $receivers[0] = ['uid' => 0, 'type' => self::TARGET_GLOBAL];
1088 // Add receiver "-1" for unlisted posts
1089 if ($fetch_unlisted && ($receiver == self::PUBLIC_COLLECTION) && ($element == 'as:cc')) {
1090 $receivers[-1] = ['uid' => -1, 'type' => self::TARGET_GLOBAL];
1093 // Fetch the receivers for the public and the followers collection
1094 if ((($receiver == $followers) || (($receiver == self::PUBLIC_COLLECTION) && !$is_forum)) && !empty($actor)) {
1095 $receivers = self::getReceiverForActor($actor, $tags, $receivers, $follower_target, $profile);
1099 // Fetching all directly addressed receivers
1100 $condition = ['self' => true, 'nurl' => Strings::normaliseLink($receiver)];
1101 $contact = DBA::selectFirst('contact', ['uid', 'contact-type'], $condition);
1102 if (!DBA::isResult($contact)) {
1106 // Check if the potential receiver is following the actor
1107 // Exception: The receiver is targetted via "to" or this is a comment
1108 if ((($element != 'as:to') && empty($replyto)) || ($contact['contact-type'] == Contact::TYPE_COMMUNITY)) {
1109 $networks = Protocol::FEDERATED;
1110 $condition = ['nurl' => Strings::normaliseLink($actor), 'rel' => [Contact::SHARING, Contact::FRIEND],
1111 'network' => $networks, 'archive' => false, 'pending' => false, 'uid' => $contact['uid']];
1113 // Forum posts are only accepted from forum contacts
1114 if ($contact['contact-type'] == Contact::TYPE_COMMUNITY) {
1115 $condition['rel'] = [Contact::SHARING, Contact::FRIEND, Contact::FOLLOWER];
1118 if (!DBA::exists('contact', $condition)) {
1123 $type = $receivers[$contact['uid']]['type'] ?? self::TARGET_UNKNOWN;
1124 if (in_array($type, [self::TARGET_UNKNOWN, self::TARGET_FOLLOWER, self::TARGET_ANSWER, self::TARGET_GLOBAL])) {
1127 $type = self::TARGET_TO;
1130 $type = self::TARGET_CC;
1133 $type = self::TARGET_BTO;
1136 $type = self::TARGET_BCC;
1140 $receivers[$contact['uid']] = ['uid' => $contact['uid'], 'type' => $type];
1145 self::switchContacts($receivers, $actor);
1151 * Fetch the receiver list of a given actor
1153 * @param string $actor
1154 * @param array $tags
1155 * @param array $receivers
1156 * @param integer $target_type
1157 * @param array $profile
1159 * @return array with receivers (user id)
1160 * @throws \Exception
1162 private static function getReceiverForActor(string $actor, array $tags, array $receivers, int $target_type, array $profile): array
1164 $basecondition = ['rel' => [Contact::SHARING, Contact::FRIEND, Contact::FOLLOWER],
1165 'network' => Protocol::FEDERATED, 'archive' => false, 'pending' => false];
1167 if (!empty($profile['uri-id'])) {
1168 $condition = DBA::mergeConditions($basecondition, ["`uri-id` = ? AND `uid` != ?", $profile['uri-id'], 0]);
1169 $contacts = DBA::select('contact', ['uid', 'rel'], $condition);
1170 while ($contact = DBA::fetch($contacts)) {
1171 if (empty($receivers[$contact['uid']]) && self::isValidReceiverForActor($contact, $tags)) {
1172 $receivers[$contact['uid']] = ['uid' => $contact['uid'], 'type' => $target_type];
1175 DBA::close($contacts);
1177 // This part will only be called while post update 1426 wasn't finished
1178 $condition = DBA::mergeConditions($basecondition, ["`nurl` = ? AND `uid` != ?", Strings::normaliseLink($actor), 0]);
1179 $contacts = DBA::select('contact', ['uid', 'rel'], $condition);
1180 while ($contact = DBA::fetch($contacts)) {
1181 if (empty($receivers[$contact['uid']]) && self::isValidReceiverForActor($contact, $tags)) {
1182 $receivers[$contact['uid']] = ['uid' => $contact['uid'], 'type' => $target_type];
1185 DBA::close($contacts);
1187 // The queries are split because of performance issues
1188 $condition = DBA::mergeConditions($basecondition, ["`alias` IN (?, ?) AND `uid` != ?", Strings::normaliseLink($actor), $actor, 0]);
1189 $contacts = DBA::select('contact', ['uid', 'rel'], $condition);
1190 while ($contact = DBA::fetch($contacts)) {
1191 if (empty($receivers[$contact['uid']]) && self::isValidReceiverForActor($contact, $tags)) {
1192 $receivers[$contact['uid']] = ['uid' => $contact['uid'], 'type' => $target_type];
1195 DBA::close($contacts);
1201 * Tests if the contact is a valid receiver for this actor
1203 * @param array $contact
1204 * @param array $tags
1206 * @return bool with receivers (user id)
1207 * @throws \Exception
1209 private static function isValidReceiverForActor(array $contact, array $tags): bool
1211 // Are we following the contact? Then this is a valid receiver
1212 if (in_array($contact['rel'], [Contact::SHARING, Contact::FRIEND])) {
1216 // When the possible receiver isn't a community, then it is no valid receiver
1217 $owner = User::getOwnerDataById($contact['uid']);
1218 if (empty($owner) || ($owner['contact-type'] != Contact::TYPE_COMMUNITY)) {
1222 // Is the community account tagged?
1223 foreach ($tags as $tag) {
1224 if ($tag['type'] != 'Mention') {
1228 if (Strings::compareLink($tag['href'], $owner['url'])) {
1237 * Switches existing contacts to ActivityPub
1239 * @param integer $cid Contact ID
1240 * @param integer $uid User ID
1241 * @param string $url Profile URL
1243 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1244 * @throws \ImagickException
1246 public static function switchContact(int $cid, int $uid, string $url)
1248 if (DBA::exists('contact', ['id' => $cid, 'network' => Protocol::ACTIVITYPUB])) {
1249 Logger::info('Contact is already ActivityPub', ['id' => $cid, 'uid' => $uid, 'url' => $url]);
1253 if (Contact::updateFromProbe($cid)) {
1254 Logger::info('Update was successful', ['id' => $cid, 'uid' => $uid, 'url' => $url]);
1257 // Send a new follow request to be sure that the connection still exists
1258 if (($uid != 0) && DBA::exists('contact', ['id' => $cid, 'rel' => [Contact::SHARING, Contact::FRIEND], 'network' => Protocol::ACTIVITYPUB])) {
1259 Logger::info('Contact had been switched to ActivityPub. Sending a new follow request.', ['uid' => $uid, 'url' => $url]);
1260 ActivityPub\Transmitter::sendActivity('Follow', $url, $uid);
1265 * @TODO Fix documentation and type-hints
1270 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1271 * @throws \ImagickException
1273 private static function switchContacts($receivers, $actor)
1275 if (empty($actor)) {
1279 foreach ($receivers as $receiver) {
1280 $contact = DBA::selectFirst('contact', ['id'], ['uid' => $receiver['uid'], 'network' => Protocol::OSTATUS, 'nurl' => Strings::normaliseLink($actor)]);
1281 if (DBA::isResult($contact)) {
1282 self::switchContact($contact['id'], $receiver['uid'], $actor);
1285 $contact = DBA::selectFirst('contact', ['id'], ['uid' => $receiver['uid'], 'network' => Protocol::OSTATUS, 'alias' => [Strings::normaliseLink($actor), $actor]]);
1286 if (DBA::isResult($contact)) {
1287 self::switchContact($contact['id'], $receiver['uid'], $actor);
1293 * @TODO Fix documentation and type-hints
1295 * @param $object_data
1296 * @param array $activity
1300 private static function addActivityFields($object_data, array $activity)
1302 if (!empty($activity['published']) && empty($object_data['published'])) {
1303 $object_data['published'] = JsonLD::fetchElement($activity, 'as:published', '@value');
1306 if (!empty($activity['diaspora:guid']) && empty($object_data['diaspora:guid'])) {
1307 $object_data['diaspora:guid'] = JsonLD::fetchElement($activity, 'diaspora:guid', '@value');
1310 $object_data['service'] = JsonLD::fetchElement($activity, 'as:instrument', 'as:name', '@type', 'as:Service');
1311 $object_data['service'] = JsonLD::fetchElement($object_data, 'service', '@value');
1313 if (!empty($object_data['object_id'])) {
1314 // Some systems (e.g. GNU Social) don't reply to the "id" field but the "uri" field.
1315 $objectId = Item::getURIByLink($object_data['object_id']);
1316 if (!empty($objectId) && ($object_data['object_id'] != $objectId)) {
1317 Logger::notice('Fix wrong object-id', ['received' => $object_data['object_id'], 'correct' => $objectId]);
1318 $object_data['object_id'] = $objectId;
1322 return $object_data;
1326 * Fetches the object data from external ressources if needed
1328 * @param string $object_id Object ID of the the provided object
1329 * @param array $object The provided object array
1330 * @param boolean $trust_source Do we trust the provided object?
1331 * @param integer $uid User ID for the signature that we use to fetch data
1333 * @return array|false with trusted and valid object data
1334 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1335 * @throws \ImagickException
1337 private static function fetchObject(string $object_id, array $object = [], bool $trust_source = false, int $uid = 0)
1339 // By fetching the type we check if the object is complete.
1340 $type = JsonLD::fetchElement($object, '@type');
1342 if (!$trust_source || empty($type)) {
1343 $data = Processor::fetchCachedActivity($object_id, $uid);
1344 if (!empty($data)) {
1345 $object = JsonLD::compact($data);
1346 Logger::info('Fetched content for ' . $object_id);
1348 Logger::info('Empty content for ' . $object_id . ', check if content is available locally.');
1350 $item = Post::selectFirst(Item::DELIVER_FIELDLIST, ['uri' => $object_id]);
1351 if (!DBA::isResult($item)) {
1352 Logger::info('Object with url ' . $object_id . ' was not found locally.');
1355 Logger::info('Using already stored item for url ' . $object_id);
1356 $data = ActivityPub\Transmitter::createNote($item);
1357 $object = JsonLD::compact($data);
1360 $id = JsonLD::fetchElement($object, '@id');
1362 Logger::info('Empty id');
1366 if ($id != $object_id) {
1367 Logger::info('Fetched id differs from provided id', ['provided' => $object_id, 'fetched' => $id]);
1371 Logger::info('Using original object for url ' . $object_id);
1374 $type = JsonLD::fetchElement($object, '@type');
1376 Logger::info('Empty type');
1380 // Lemmy is resharing "create" activities instead of content
1381 // We fetch the content from the activity.
1382 if (in_array($type, ['as:Create'])) {
1383 $object = $object['as:object'];
1384 $type = JsonLD::fetchElement($object, '@type');
1386 Logger::info('Empty type');
1389 $object_data = self::processObject($object);
1392 // We currently don't handle 'pt:CacheFile', but with this step we avoid logging
1393 if (in_array($type, self::CONTENT_TYPES) || ($type == 'pt:CacheFile')) {
1394 $object_data = self::processObject($object);
1396 if (!empty($data)) {
1397 $object_data['raw-object'] = json_encode($data);
1399 return $object_data;
1402 if ($type == 'as:Announce') {
1403 $object_id = JsonLD::fetchElement($object, 'object', '@id');
1404 if (empty($object_id) || !is_string($object_id)) {
1407 return self::fetchObject($object_id, [], false, $uid);
1410 Logger::info('Unhandled object type: ' . $type);
1415 * Converts the language element (Used by Peertube)
1417 * @param array $languages
1418 * @return array Languages
1420 public static function processLanguages(array $languages): array
1422 if (empty($languages)) {
1426 $language_list = [];
1428 foreach ($languages as $language) {
1429 if (!empty($language['_:identifier']) && !empty($language['as:name'])) {
1430 $language_list[$language['_:identifier']] = $language['as:name'];
1433 return $language_list;
1437 * Convert tags from JSON-LD format into a simplified format
1439 * @param array $tags Tags in JSON-LD format
1441 * @return array with tags in a simplified format
1443 public static function processTags(array $tags): array
1447 foreach ($tags as $tag) {
1452 $element = ['type' => str_replace('as:', '', JsonLD::fetchElement($tag, '@type')),
1453 'href' => JsonLD::fetchElement($tag, 'as:href', '@id'),
1454 'name' => JsonLD::fetchElement($tag, 'as:name', '@value')];
1456 if (empty($element['type'])) {
1460 if (empty($element['href'])) {
1461 $element['href'] = $element['name'];
1464 $taglist[] = $element;
1470 * Convert emojis from JSON-LD format into a simplified format
1472 * @param array $emojis
1473 * @return array with emojis in a simplified format
1475 private static function processEmojis(array $emojis): array
1479 foreach ($emojis as $emoji) {
1480 if (empty($emoji) || (JsonLD::fetchElement($emoji, '@type') != 'toot:Emoji') || empty($emoji['as:icon'])) {
1484 $url = JsonLD::fetchElement($emoji['as:icon'], 'as:url', '@id');
1485 $element = ['name' => JsonLD::fetchElement($emoji, 'as:name', '@value'),
1488 $emojilist[] = $element;
1495 * Convert attachments from JSON-LD format into a simplified format
1497 * @param array $attachments Attachments in JSON-LD format
1499 * @return array Attachments in a simplified format
1501 private static function processAttachments(array $attachments): array
1505 // Removes empty values
1506 $attachments = array_filter($attachments);
1508 foreach ($attachments as $attachment) {
1509 switch (JsonLD::fetchElement($attachment, '@type')) {
1514 $urls = JsonLD::fetchElementArray($attachment, 'as:url');
1515 foreach ($urls as $url) {
1516 // Single scalar URL case
1517 if (is_string($url)) {
1522 $href = JsonLD::fetchElement($url, 'as:href', '@id');
1523 $mediaType = JsonLD::fetchElement($url, 'as:mediaType', '@value');
1524 if (Strings::startsWith($mediaType, 'image')) {
1533 'title' => JsonLD::fetchElement($attachment, 'as:name', '@value'),
1534 'desc' => JsonLD::fetchElement($attachment, 'as:summary', '@value'),
1536 'image' => $pageImage,
1540 $mediaType = JsonLD::fetchElement($attachment, 'as:mediaType', '@value');
1541 $imageFullUrl = JsonLD::fetchElement($attachment, 'as:url', '@id');
1542 $imagePreviewUrl = null;
1544 if (!$imageFullUrl && ($urls = JsonLD::fetchElementArray($attachment, 'as:url'))) {
1545 $imageVariants = [];
1546 $previewVariants = [];
1547 foreach ($urls as $url) {
1548 // Scalar URL, no discrimination possible
1549 if (is_string($url)) {
1550 $imageFullUrl = $url;
1554 // Not sure what to do with a different Link media type than the base Image, we skip
1555 if ($mediaType != JsonLD::fetchElement($url, 'as:mediaType', '@value')) {
1559 $href = JsonLD::fetchElement($url, 'as:href', '@id');
1561 // Default URL choice if no discriminating width is provided
1562 $imageFullUrl = $href ?? $imageFullUrl;
1564 $width = intval(JsonLD::fetchElement($url, 'as:width', '@value') ?? 1);
1566 if ($href && $width) {
1567 $imageVariants[$width] = $href;
1568 // 632 is the ideal width for full screen frio posts, we compute the absolute distance to it
1569 $previewVariants[abs(632 - $width)] = $href;
1573 if ($imageVariants) {
1574 // Taking the maximum size image
1575 ksort($imageVariants);
1576 $imageFullUrl = array_pop($imageVariants);
1578 // Taking the minimum number distance to the target distance
1579 ksort($previewVariants);
1580 $imagePreviewUrl = array_shift($previewVariants);
1583 unset($imageVariants);
1584 unset($previewVariants);
1588 'type' => str_replace('as:', '', JsonLD::fetchElement($attachment, '@type')),
1589 'mediaType' => $mediaType,
1590 'name' => JsonLD::fetchElement($attachment, 'as:name', '@value'),
1591 'url' => $imageFullUrl,
1592 'image' => $imagePreviewUrl !== $imageFullUrl ? $imagePreviewUrl : null,
1597 'type' => str_replace('as:', '', JsonLD::fetchElement($attachment, '@type')),
1598 'mediaType' => JsonLD::fetchElement($attachment, 'as:mediaType', '@value'),
1599 'name' => JsonLD::fetchElement($attachment, 'as:name', '@value'),
1600 'url' => JsonLD::fetchElement($attachment, 'as:url', '@id'),
1601 'height' => JsonLD::fetchElement($attachment, 'as:height', '@value'),
1602 'width' => JsonLD::fetchElement($attachment, 'as:width', '@value'),
1603 'image' => JsonLD::fetchElement($attachment, 'as:image', '@id')
1612 * Convert questions from JSON-LD format into a simplified format
1614 * @param array $object
1616 * @return array Questions in a simplified format
1618 private static function processQuestion(array $object): array
1622 if (!empty($object['as:oneOf'])) {
1623 $question['multiple'] = false;
1624 $options = JsonLD::fetchElementArray($object, 'as:oneOf') ?? [];
1625 } elseif (!empty($object['as:anyOf'])) {
1626 $question['multiple'] = true;
1627 $options = JsonLD::fetchElementArray($object, 'as:anyOf') ?? [];
1632 $closed = JsonLD::fetchElement($object, 'as:closed', '@value');
1633 if (!empty($closed)) {
1634 $question['end-time'] = $closed;
1636 $question['end-time'] = JsonLD::fetchElement($object, 'as:endTime', '@value');
1639 $question['voters'] = (int)JsonLD::fetchElement($object, 'toot:votersCount', '@value');
1640 $question['options'] = [];
1644 foreach ($options as $option) {
1645 if (JsonLD::fetchElement($option, '@type') != 'as:Note') {
1649 $name = JsonLD::fetchElement($option, 'as:name', '@value');
1651 if (empty($option['as:replies'])) {
1655 $replies = JsonLD::fetchElement($option['as:replies'], 'as:totalItems', '@value');
1657 $question['options'][] = ['name' => $name, 'replies' => $replies];
1659 $voters += (int)$replies;
1662 // For single choice question we can count the number of voters if not provided (like with Misskey)
1663 if (empty($question['voters']) && !$question['multiple']) {
1664 $question['voters'] = $voters;
1671 * Fetch the original source or content with the "language" Markdown or HTML
1673 * @param array $object
1674 * @param array $object_data
1676 * @return array Object data (?)
1677 * @throws \Exception
1679 private static function getSource(array $object, array $object_data): array
1681 $object_data['source'] = JsonLD::fetchElement($object, 'as:source', 'as:content', 'as:mediaType', 'text/bbcode');
1682 $object_data['source'] = JsonLD::fetchElement($object_data, 'source', '@value');
1683 if (!empty($object_data['source'])) {
1684 return $object_data;
1687 $object_data['source'] = JsonLD::fetchElement($object, 'as:source', 'as:content', 'as:mediaType', 'text/markdown');
1688 $object_data['source'] = JsonLD::fetchElement($object_data, 'source', '@value');
1689 if (!empty($object_data['source'])) {
1690 $object_data['source'] = Markdown::toBBCode($object_data['source']);
1691 return $object_data;
1694 $object_data['source'] = JsonLD::fetchElement($object, 'as:source', 'as:content', 'as:mediaType', 'text/html');
1695 $object_data['source'] = JsonLD::fetchElement($object_data, 'source', '@value');
1696 if (!empty($object_data['source'])) {
1697 $object_data['source'] = HTML::toBBCode($object_data['source']);
1698 return $object_data;
1701 return $object_data;
1705 * Extracts a potential alternate URL from a list of additional URL elements
1707 * @param array $urls
1710 private static function extractAlternateUrl(array $urls): string
1713 foreach ($urls as $key => $url) {
1714 // Not a list but a single URL element
1715 if (!is_numeric($key)) {
1719 if (empty($url['@type']) || ($url['@type'] != 'as:Link')) {
1723 $href = JsonLD::fetchElement($url, 'as:href', '@id');
1728 $mediatype = JsonLD::fetchElement($url, 'as:mediaType');
1729 if (empty($mediatype)) {
1733 if ($mediatype == 'text/html') {
1734 $alternateUrl = $href;
1738 return $alternateUrl;
1742 * Check if the "as:url" element is an array with multiple links
1743 * This is the case with audio and video posts.
1744 * Then the links are added as attachments
1746 * @param array $urls The object URL list
1747 * @return array an array of attachments
1749 private static function processAttachmentUrls(array $urls): array
1752 foreach ($urls as $key => $url) {
1753 // Not a list but a single URL element
1754 if (!is_numeric($key)) {
1758 if (empty($url['@type']) || ($url['@type'] != 'as:Link')) {
1762 $href = JsonLD::fetchElement($url, 'as:href', '@id');
1767 $mediatype = JsonLD::fetchElement($url, 'as:mediaType');
1768 if (empty($mediatype)) {
1772 $filetype = strtolower(substr($mediatype, 0, strpos($mediatype, '/')));
1774 if ($filetype == 'audio') {
1775 $attachments[] = ['type' => $filetype, 'mediaType' => $mediatype, 'url' => $href, 'height' => null, 'size' => null, 'name' => ''];
1776 } elseif ($filetype == 'video') {
1777 $height = (int)JsonLD::fetchElement($url, 'as:height', '@value');
1778 // PeerTube audio-only track
1779 if ($height === 0) {
1783 $size = (int)JsonLD::fetchElement($url, 'pt:size', '@value');
1784 $attachments[] = ['type' => $filetype, 'mediaType' => $mediatype, 'url' => $href, 'height' => $height, 'size' => $size, 'name' => ''];
1785 } elseif (in_array($mediatype, ['application/x-bittorrent', 'application/x-bittorrent;x-scheme-handler/magnet'])) {
1786 $height = (int)JsonLD::fetchElement($url, 'as:height', '@value');
1788 // For Torrent links we always store the highest resolution
1789 if (!empty($attachments[$mediatype]['height']) && ($height < $attachments[$mediatype]['height'])) {
1793 $attachments[$mediatype] = ['type' => $mediatype, 'mediaType' => $mediatype, 'url' => $href, 'height' => $height, 'size' => null, 'name' => ''];
1794 } elseif ($mediatype == 'application/x-mpegURL') {
1795 // PeerTube exception, actual video link is in the tags of this URL element
1796 $attachments = array_merge($attachments, self::processAttachmentUrls($url['as:tag']));
1800 return array_values($attachments);
1804 * Fetches data from the object part of an activity
1806 * @param array $object
1808 * @return array|bool Object data or FALSE if $object does not contain @id element
1809 * @throws \Exception
1811 private static function processObject(array $object)
1813 if (!JsonLD::fetchElement($object, '@id')) {
1818 $object_data['object_type'] = JsonLD::fetchElement($object, '@type');
1819 $object_data['id'] = JsonLD::fetchElement($object, '@id');
1820 $object_data['reply-to-id'] = JsonLD::fetchElement($object, 'as:inReplyTo', '@id');
1822 // An empty "id" field is translated to "./" by the compactor, so we have to check for this content
1823 if (empty($object_data['reply-to-id']) || ($object_data['reply-to-id'] == './')) {
1824 $object_data['reply-to-id'] = $object_data['id'];
1826 // On activities the "reply to" is the id of the object it refers to
1827 if (in_array($object_data['object_type'], self::ACTIVITY_TYPES)) {
1828 $object_id = JsonLD::fetchElement($object, 'as:object', '@id');
1829 if (!empty($object_id)) {
1830 $object_data['reply-to-id'] = $object_id;
1834 // Some systems (e.g. GNU Social) don't reply to the "id" field but the "uri" field.
1835 $replyToId = Item::getURIByLink($object_data['reply-to-id']);
1836 if (!empty($replyToId) && ($object_data['reply-to-id'] != $replyToId)) {
1837 Logger::notice('Fix wrong reply-to', ['received' => $object_data['reply-to-id'], 'correct' => $replyToId]);
1838 $object_data['reply-to-id'] = $replyToId;
1842 $object_data['published'] = JsonLD::fetchElement($object, 'as:published', '@value');
1843 $object_data['updated'] = JsonLD::fetchElement($object, 'as:updated', '@value');
1845 if (empty($object_data['updated'])) {
1846 $object_data['updated'] = $object_data['published'];
1849 if (empty($object_data['published']) && !empty($object_data['updated'])) {
1850 $object_data['published'] = $object_data['updated'];
1853 $actor = JsonLD::fetchElement($object, 'as:attributedTo', '@id');
1854 if (empty($actor)) {
1855 $actor = JsonLD::fetchElement($object, 'as:actor', '@id');
1858 $location = JsonLD::fetchElement($object, 'as:location', 'as:name', '@type', 'as:Place');
1859 $location = JsonLD::fetchElement($location, 'location', '@value');
1861 // Some AP software allow formatted text in post location, so we run all the text converters we have to boil
1862 // down to HTML and then finally format to plaintext.
1863 $location = Markdown::convert($location);
1864 $location = BBCode::toPlaintext($location);
1867 $object_data['sc:identifier'] = JsonLD::fetchElement($object, 'sc:identifier', '@value');
1868 $object_data['diaspora:guid'] = JsonLD::fetchElement($object, 'diaspora:guid', '@value');
1869 $object_data['diaspora:comment'] = JsonLD::fetchElement($object, 'diaspora:comment', '@value');
1870 $object_data['diaspora:like'] = JsonLD::fetchElement($object, 'diaspora:like', '@value');
1871 $object_data['actor'] = $object_data['author'] = $actor;
1872 $element = JsonLD::fetchElement($object, 'as:context', '@id');
1873 $object_data['context'] = $element != './' ? $element : null;
1874 $element = JsonLD::fetchElement($object, 'ostatus:conversation', '@id');
1875 $object_data['conversation'] = $element != './' ? $element : null;
1876 $object_data['sensitive'] = JsonLD::fetchElement($object, 'as:sensitive');
1877 $object_data['name'] = JsonLD::fetchElement($object, 'as:name', '@value');
1878 $object_data['summary'] = JsonLD::fetchElement($object, 'as:summary', '@value');
1879 $object_data['content'] = JsonLD::fetchElement($object, 'as:content', '@value');
1880 $object_data['mediatype'] = JsonLD::fetchElement($object, 'as:mediaType', '@value');
1881 $object_data = self::getSource($object, $object_data);
1882 $object_data['start-time'] = JsonLD::fetchElement($object, 'as:startTime', '@value');
1883 $object_data['end-time'] = JsonLD::fetchElement($object, 'as:endTime', '@value');
1884 $object_data['location'] = $location;
1885 $object_data['latitude'] = JsonLD::fetchElement($object, 'as:location', 'as:latitude', '@type', 'as:Place');
1886 $object_data['latitude'] = JsonLD::fetchElement($object_data, 'latitude', '@value');
1887 $object_data['longitude'] = JsonLD::fetchElement($object, 'as:location', 'as:longitude', '@type', 'as:Place');
1888 $object_data['longitude'] = JsonLD::fetchElement($object_data, 'longitude', '@value');
1889 $object_data['attachments'] = self::processAttachments(JsonLD::fetchElementArray($object, 'as:attachment') ?? []);
1890 $object_data['tags'] = self::processTags(JsonLD::fetchElementArray($object, 'as:tag') ?? []);
1891 $object_data['emojis'] = self::processEmojis(JsonLD::fetchElementArray($object, 'as:tag', null, '@type', 'toot:Emoji') ?? []);
1892 $object_data['languages'] = self::processLanguages(JsonLD::fetchElementArray($object, 'sc:inLanguage') ?? []);
1893 $object_data['generator'] = JsonLD::fetchElement($object, 'as:generator', 'as:name', '@type', 'as:Application');
1894 $object_data['generator'] = JsonLD::fetchElement($object_data, 'generator', '@value');
1895 $object_data['alternate-url'] = JsonLD::fetchElement($object, 'as:url', '@id');
1897 // Special treatment for Hubzilla links
1898 if (is_array($object_data['alternate-url'])) {
1899 $object_data['alternate-url'] = JsonLD::fetchElement($object_data['alternate-url'], 'as:href', '@id');
1901 if (!is_string($object_data['alternate-url'])) {
1902 $object_data['alternate-url'] = JsonLD::fetchElement($object['as:url'], 'as:href', '@id');
1906 if (!empty($object_data['alternate-url']) && !Network::isValidHttpUrl($object_data['alternate-url'])) {
1907 $object_data['alternate-url'] = null;
1910 if (in_array($object_data['object_type'], ['as:Audio', 'as:Video'])) {
1911 $object_data['alternate-url'] = self::extractAlternateUrl($object['as:url'] ?? []) ?: $object_data['alternate-url'];
1912 $object_data['attachments'] = array_merge($object_data['attachments'], self::processAttachmentUrls($object['as:url'] ?? []));
1915 // For page types we expect that the alternate url posts to some page.
1916 // So we add this to the attachments if it differs from the id.
1917 // Currently only Lemmy is using the page type.
1918 if (($object_data['object_type'] == 'as:Page') && !empty($object_data['alternate-url']) && !Strings::compareLink($object_data['alternate-url'], $object_data['id'])) {
1919 $object_data['attachments'][] = ['url' => $object_data['alternate-url']];
1920 $object_data['alternate-url'] = null;
1923 if ($object_data['object_type'] == 'as:Question') {
1924 $object_data['question'] = self::processQuestion($object);
1927 $receiverdata = self::getReceivers($object, $object_data['actor'] ?? '', $object_data['tags'], true);
1928 $receivers = $reception_types = [];
1929 foreach ($receiverdata as $key => $data) {
1930 $receivers[$key] = $data['uid'];
1931 $reception_types[$data['uid']] = $data['type'] ?? 0;
1934 $object_data['receiver_urls'] = self::getReceiverURL($object);
1935 $object_data['receiver'] = $receivers;
1936 $object_data['reception_type'] = $reception_types;
1938 $object_data['unlisted'] = in_array(-1, $object_data['receiver']);
1939 unset($object_data['receiver'][-1]);
1940 unset($object_data['reception_type'][-1]);
1942 return $object_data;
1946 * Add an object id to the list of arrived activities
1952 private static function addArrivedId(string $id)
1954 DBA::delete('arrived-activity', ["`received` < ?", DateTimeFormat::utc('now - 5 minutes')]);
1955 DBA::insert('arrived-activity', ['object-id' => $id, 'received' => DateTimeFormat::utcNow()], Database::INSERT_IGNORE);
1959 * Checks if the given object already arrived before
1965 private static function hasArrived(string $id): bool
1967 return DBA::exists('arrived-activity', ['object-id' => $id]);