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\Content\Text\HTML;
26 use Friendica\Content\Text\Markdown;
27 use Friendica\Core\Cache\Enum\Duration;
28 use Friendica\Core\Logger;
29 use Friendica\Core\Protocol;
30 use Friendica\Core\System;
31 use Friendica\Core\Worker;
32 use Friendica\Database\DBA;
34 use Friendica\Model\APContact;
35 use Friendica\Model\Contact;
36 use Friendica\Model\Conversation;
37 use Friendica\Model\Event;
38 use Friendica\Model\Group;
39 use Friendica\Model\GServer;
40 use Friendica\Model\Item;
41 use Friendica\Model\ItemURI;
42 use Friendica\Model\Mail;
43 use Friendica\Model\Tag;
44 use Friendica\Model\User;
45 use Friendica\Model\Post;
46 use Friendica\Protocol\Activity;
47 use Friendica\Protocol\ActivityPub;
48 use Friendica\Protocol\Delivery;
49 use Friendica\Protocol\Relay;
50 use Friendica\Util\DateTimeFormat;
51 use Friendica\Util\HTTPSignature;
52 use Friendica\Util\JsonLD;
53 use Friendica\Util\Network;
54 use Friendica\Util\Strings;
57 * ActivityPub Processor Protocol class
61 const CACHEKEY_FETCH_ACTIVITY = 'processor:fetchMissingActivity:';
62 const CACHEKEY_JUST_FETCHED = 'processor:isJustFetched:';
65 * Add an object id to the list of processed ids
71 private static function addActivityId(string $id)
73 DBA::delete('fetched-activity', ["`received` < ?", DateTimeFormat::utc('now - 5 minutes')]);
74 DBA::insert('fetched-activity', ['object-id' => $id, 'received' => DateTimeFormat::utcNow()]);
78 * Checks if the given object id has just been fetched
84 private static function isFetched(string $id): bool
86 return DBA::exists('fetched-activity', ['object-id' => $id]);
90 * Extracts the tag character (#, @, !) from mention links
95 public static function normalizeMentionLinks(string $body): string
97 return preg_replace('%\[url=([^\[\]]*)]([#@!])(.*?)\[/url]%ism', '$2[url=$1]$3[/url]', $body);
101 * Convert the language array into a language JSON
103 * @param array $languages
104 * @return string language JSON
106 private static function processLanguages(array $languages): string
108 $codes = array_keys($languages);
110 foreach ($codes as $code) {
118 return json_encode($lang);
121 * Replaces emojis in the body
124 * @param string $body
125 * @param array $emojis
127 * @return string with replaced emojis
129 private static function replaceEmojis(int $uri_id, string $body, array $emojis): string
133 array_column($emojis, 'name'),
134 array_map(function ($emoji) {
135 return '[emoji=' . $emoji['href'] . ']' . $emoji['name'] . '[/emoji]';
140 // We store the emoji here to be able to avoid storing it in the media
141 foreach ($emojis as $emoji) {
142 Post\Link::getByLink($uri_id, $emoji['href']);
148 * Store attached media files in the post-media table
151 * @param array $attachment
154 private static function storeAttachmentAsMedia(int $uriid, array $attachment)
156 if (empty($attachment['url'])) {
160 $data = ['uri-id' => $uriid];
161 $data['type'] = Post\Media::UNKNOWN;
162 $data['url'] = $attachment['url'];
163 $data['mimetype'] = $attachment['mediaType'] ?? null;
164 $data['height'] = $attachment['height'] ?? null;
165 $data['width'] = $attachment['width'] ?? null;
166 $data['size'] = $attachment['size'] ?? null;
167 $data['preview'] = $attachment['image'] ?? null;
168 $data['description'] = $attachment['name'] ?? null;
170 Post\Media::insert($data);
174 * Store attachment data
176 * @param array $activity
179 private static function storeAttachments(array $activity, array $item)
181 if (empty($activity['attachments'])) {
185 foreach ($activity['attachments'] as $attach) {
186 self::storeAttachmentAsMedia($item['uri-id'], $attach);
191 * Store question data
193 * @param array $activity
196 private static function storeQuestion(array $activity, array $item)
198 if (empty($activity['question'])) {
201 $question = ['multiple' => $activity['question']['multiple']];
203 if (!empty($activity['question']['voters'])) {
204 $question['voters'] = $activity['question']['voters'];
207 if (!empty($activity['question']['end-time'])) {
208 $question['end-time'] = DateTimeFormat::utc($activity['question']['end-time']);
211 Post\Question::update($item['uri-id'], $question);
213 foreach ($activity['question']['options'] as $key => $option) {
214 $option = ['name' => $option['name'], 'replies' => $option['replies']];
215 Post\QuestionOption::update($item['uri-id'], $key, $option);
218 Logger::debug('Storing incoming question', ['type' => $activity['type'], 'uri-id' => $item['uri-id'], 'question' => $activity['question']]);
224 * @param array $activity Activity array
225 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
226 * @throws \ImagickException
228 public static function updateItem(array $activity)
230 $item = Post::selectFirst(['uri', 'uri-id', 'thr-parent', 'gravity', 'post-type', 'private'], ['uri' => $activity['id']]);
231 if (!DBA::isResult($item)) {
232 Logger::notice('No existing item, item will be created', ['uri' => $activity['id']]);
233 $item = self::createItem($activity, false);
235 Queue::remove($activity);
239 self::postItem($activity, $item);
243 $item['changed'] = DateTimeFormat::utcNow();
244 $item['edited'] = DateTimeFormat::utc($activity['updated']);
246 $item = self::processContent($activity, $item);
248 Queue::remove($activity);
252 self::storeAttachments($activity, $item);
253 self::storeQuestion($activity, $item);
255 Post\History::add($item['uri-id'], $item);
256 Item::update($item, ['uri' => $activity['id']]);
258 Queue::remove($activity);
260 if ($activity['object_type'] == 'as:Event') {
261 $posts = Post::select(['event-id', 'uid'], ["`uri` = ? AND `event-id` > ?", $activity['id'], 0]);
262 while ($post = DBA::fetch($posts)) {
263 self::updateEvent($post['event-id'], $activity);
269 * Update an existing event
271 * @param int $event_id
272 * @param array $activity
274 private static function updateEvent(int $event_id, array $activity)
276 $event = DBA::selectFirst('event', [], ['id' => $event_id]);
278 $event['edited'] = DateTimeFormat::utc($activity['updated']);
279 $event['summary'] = HTML::toBBCode($activity['name']);
280 $event['desc'] = HTML::toBBCode($activity['content']);
281 if (!empty($activity['start-time'])) {
282 $event['start'] = DateTimeFormat::utc($activity['start-time']);
284 if (!empty($activity['end-time'])) {
285 $event['finish'] = DateTimeFormat::utc($activity['end-time']);
287 $event['nofinish'] = empty($event['finish']);
288 $event['location'] = $activity['location'];
290 Logger::info('Updating event', ['uri' => $activity['id'], 'id' => $event_id]);
291 Event::store($event);
295 * Prepares data for a message
297 * @param array $activity Activity array
298 * @param bool $fetch_parents
300 * @return array Internal item
302 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
303 * @throws \ImagickException
305 public static function createItem(array $activity, bool $fetch_parents): array
308 $item['verb'] = Activity::POST;
309 $item['thr-parent'] = $activity['reply-to-id'];
311 if ($activity['reply-to-id'] == $activity['id']) {
312 $item['gravity'] = Item::GRAVITY_PARENT;
313 $item['object-type'] = Activity\ObjectType::NOTE;
315 $item['gravity'] = Item::GRAVITY_COMMENT;
316 $item['object-type'] = Activity\ObjectType::COMMENT;
319 if (!empty($activity['conversation'])) {
320 $item['conversation'] = $activity['conversation'];
321 } elseif (!empty($activity['context'])) {
322 $item['conversation'] = $activity['context'];
325 if (!empty($item['conversation'])) {
326 $conversation = Post::selectFirstThread(['uri'], ['conversation' => $item['conversation']]);
327 if (!empty($conversation)) {
328 Logger::debug('Got conversation', ['conversation' => $item['conversation'], 'parent' => $conversation]);
329 $item['parent-uri'] = $conversation['uri'];
330 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
336 Logger::debug('Create Item', ['id' => $activity['id'], 'conversation' => $item['conversation'] ?? '']);
337 if (empty($activity['author']) && empty($activity['actor'])) {
338 Logger::notice('Missing author and actor. We quit here.', ['activity' => $activity]);
339 Queue::remove($activity);
343 if (!in_array(0, $activity['receiver']) || !DI::config()->get('system', 'fetch_parents')) {
344 $fetch_parents = false;
347 if ($fetch_parents && empty($activity['directmessage']) && ($activity['id'] != $activity['reply-to-id']) && !Post::exists(['uri' => $activity['reply-to-id']])) {
348 $result = self::fetchParent($activity, !empty($conversation));
349 if (!empty($result)) {
350 if (($item['thr-parent'] != $result) && Post::exists(['uri' => $result])) {
351 $item['thr-parent'] = $result;
353 } elseif (empty($conversation)) {
358 $item['diaspora_signed_text'] = $activity['diaspora:comment'] ?? '';
360 if (empty($conversation) && empty($activity['directmessage']) && ($item['gravity'] != Item::GRAVITY_PARENT) && !Post::exists(['uri' => $item['thr-parent']])) {
361 Logger::notice('Parent not found, message will be discarded.', ['thr-parent' => $item['thr-parent']]);
362 if (!$fetch_parents) {
363 Queue::remove($activity);
368 $item['network'] = Protocol::ACTIVITYPUB;
369 $item['author-link'] = $activity['author'];
370 $item['author-id'] = Contact::getIdForURL($activity['author']);
371 $item['owner-link'] = $activity['actor'];
372 $item['owner-id'] = Contact::getIdForURL($activity['actor']);
374 if (in_array(0, $activity['receiver']) && !empty($activity['unlisted'])) {
375 $item['private'] = Item::UNLISTED;
376 } elseif (in_array(0, $activity['receiver'])) {
377 $item['private'] = Item::PUBLIC;
379 $item['private'] = Item::PRIVATE;
382 if (!empty($activity['raw'])) {
383 $item['source'] = $activity['raw'];
386 $item['protocol'] = Conversation::PARCEL_ACTIVITYPUB;
388 if (isset($activity['push'])) {
389 $item['direction'] = $activity['push'] ? Conversation::PUSH : Conversation::PULL;
392 if (!empty($activity['from-relay'])) {
393 $item['direction'] = Conversation::RELAY;
396 if ($activity['object_type'] == 'as:Article') {
397 $item['post-type'] = Item::PT_ARTICLE;
398 } elseif ($activity['object_type'] == 'as:Audio') {
399 $item['post-type'] = Item::PT_AUDIO;
400 } elseif ($activity['object_type'] == 'as:Document') {
401 $item['post-type'] = Item::PT_DOCUMENT;
402 } elseif ($activity['object_type'] == 'as:Event') {
403 $item['post-type'] = Item::PT_EVENT;
404 } elseif ($activity['object_type'] == 'as:Image') {
405 $item['post-type'] = Item::PT_IMAGE;
406 } elseif ($activity['object_type'] == 'as:Page') {
407 $item['post-type'] = Item::PT_PAGE;
408 } elseif ($activity['object_type'] == 'as:Question') {
409 $item['post-type'] = Item::PT_POLL;
410 } elseif ($activity['object_type'] == 'as:Video') {
411 $item['post-type'] = Item::PT_VIDEO;
413 $item['post-type'] = Item::PT_NOTE;
416 $item['isForum'] = false;
418 if (!empty($activity['thread-completion'])) {
419 if ($activity['thread-completion'] != $item['owner-id']) {
420 $actor = Contact::getById($activity['thread-completion'], ['url']);
421 $item['causer-link'] = $actor['url'];
422 $item['causer-id'] = $activity['thread-completion'];
423 Logger::info('Use inherited actor as causer.', ['id' => $item['owner-id'], 'activity' => $activity['thread-completion'], 'owner' => $item['owner-link'], 'actor' => $actor['url']]);
425 // Store the original actor in the "causer" fields to enable the check for ignored or blocked contacts
426 $item['causer-link'] = $item['owner-link'];
427 $item['causer-id'] = $item['owner-id'];
428 Logger::info('Use actor as causer.', ['id' => $item['owner-id'], 'actor' => $item['owner-link']]);
431 $item['owner-link'] = $item['author-link'];
432 $item['owner-id'] = $item['author-id'];
434 $actor = APContact::getByURL($item['owner-link'], false);
435 $item['isForum'] = ($actor['type'] ?? 'Person') == 'Group';
438 $item['uri'] = $activity['id'];
440 if (empty($activity['published']) || empty($activity['updated'])) {
441 DI::logger()->notice('published or updated keys are empty for activity', ['activity' => $activity, 'callstack' => System::callstack(10)]);
444 $item['created'] = DateTimeFormat::utc($activity['published'] ?? 'now');
445 $item['edited'] = DateTimeFormat::utc($activity['updated'] ?? 'now');
446 $guid = $activity['sc:identifier'] ?: self::getGUIDByURL($item['uri']);
447 $item['guid'] = $activity['diaspora:guid'] ?: $guid;
449 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
450 if (empty($item['uri-id'])) {
451 Logger::warning('Unable to get a uri-id for an item uri', ['uri' => $item['uri'], 'guid' => $item['guid']]);
455 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
457 $item = self::processContent($activity, $item);
459 Logger::info('Message was not processed');
460 Queue::remove($activity);
464 $item['plink'] = $activity['alternate-url'] ?? $item['uri'];
466 self::storeAttachments($activity, $item);
467 self::storeQuestion($activity, $item);
469 // We received the post via AP, so we set the protocol of the server to AP
470 $contact = Contact::getById($item['author-id'], ['gsid']);
471 if (!empty($contact['gsid'])) {
472 GServer::setProtocol($contact['gsid'], Post\DeliveryData::ACTIVITYPUB);
475 if ($item['author-id'] != $item['owner-id']) {
476 $contact = Contact::getById($item['owner-id'], ['gsid']);
477 if (!empty($contact['gsid'])) {
478 GServer::setProtocol($contact['gsid'], Post\DeliveryData::ACTIVITYPUB);
486 * Fetch and process parent posts for the given activity
488 * @param array $activity
489 * @param bool $in_background
493 private static function fetchParent(array $activity, bool $in_background = false): string
495 if (self::isFetched($activity['reply-to-id'])) {
496 Logger::info('Id is already fetched', ['id' => $activity['reply-to-id']]);
500 self::addActivityId($activity['reply-to-id']);
502 if (!DI::config()->get('system', 'fetch_by_worker')) {
503 $in_background = false;
506 $recursion_depth = $activity['recursion-depth'] ?? 0;
508 if (!$in_background && ($recursion_depth < DI::config()->get('system', 'max_recursion_depth'))) {
509 Logger::notice('Parent not found. Try to refetch it.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
510 $result = self::fetchMissingActivity($activity['reply-to-id'], $activity, '', Receiver::COMPLETION_AUTO);
511 if (empty($result) && self::isActivityGone($activity['reply-to-id'])) {
512 Logger::notice('The activity is gone, the queue entry will be deleted', ['parent' => $activity['reply-to-id']]);
513 if (!empty($activity['entry-id'])) {
514 Queue::deleteById($activity['entry-id']);
517 } elseif (!empty($result)) {
518 $exists = Post::exists(['uri' => [$result, $activity['reply-to-id']]]);
520 Logger::notice('The activity has been fetched and created.', ['parent' => $result]);
522 } elseif (DI::config()->get('system', 'fetch_by_worker') || DI::config()->get('system', 'decoupled_receiver')) {
523 Logger::notice('The activity has been fetched and will hopefully be created later.', ['parent' => $result]);
525 Logger::notice('The activity exists but has not been created, the queue entry will be deleted.', ['parent' => $result]);
526 if (!empty($activity['entry-id'])) {
527 Queue::deleteById($activity['entry-id']);
532 if (empty($result) && !DI::config()->get('system', 'fetch_by_worker')) {
535 } elseif (self::isActivityGone($activity['reply-to-id'])) {
536 Logger::notice('The activity is gone. We will not spawn a worker. The queue entry will be deleted', ['parent' => $activity['reply-to-id']]);
537 if ($in_background) {
538 // fetching in background is done for all activities where we have got the conversation
539 // There we only delete the single activity and not the whole thread since we can store the
540 // other posts in the thread even with missing posts.
541 Queue::remove($activity);
542 } elseif (!empty($activity['entry-id'])) {
543 Queue::deleteById($activity['entry-id']);
546 } elseif ($in_background) {
547 Logger::notice('Fetching is done in the background.', ['parent' => $activity['reply-to-id']]);
549 Logger::notice('Recursion level is too high.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
552 if (!Fetch::hasWorker($activity['reply-to-id'])) {
553 Logger::notice('Fetching is done by worker.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
554 Fetch::add($activity['reply-to-id']);
555 $activity['recursion-depth'] = 0;
556 $wid = Worker::add(Worker::PRIORITY_HIGH, 'FetchMissingActivity', $activity['reply-to-id'], $activity, '', Receiver::COMPLETION_AUTO);
557 Fetch::setWorkerId($activity['reply-to-id'], $wid);
559 Logger::debug('Activity will already be fetched via a worker.', ['url' => $activity['reply-to-id']]);
566 * Check if a given activity is no longer available
572 public static function isActivityGone(string $url): bool
574 $curlResult = HTTPSignature::fetchRaw($url, 0);
576 if (Network::isUrlBlocked($url)) {
580 // @todo To ensure that the remote system is working correctly, we can check if the "Content-Type" contains JSON
581 if (in_array($curlResult->getReturnCode(), [401, 404])) {
585 if ($curlResult->isSuccess()) {
586 $object = json_decode($curlResult->getBody(), true);
587 if (!empty($object)) {
588 $activity = JsonLD::compact($object);
589 if (JsonLD::fetchElement($activity, '@type') == 'as:Tombstone') {
593 } elseif ($curlResult->getReturnCode() == 0) {
594 $host = parse_url($url, PHP_URL_HOST);
595 if (!(filter_var($host, FILTER_VALIDATE_IP) || @dns_get_record($host . '.', DNS_A + DNS_AAAA))) {
605 * @param array $activity
606 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
607 * @throws \ImagickException
609 public static function deleteItem(array $activity)
611 $owner = Contact::getIdForURL($activity['actor']);
613 Logger::info('Deleting item', ['object' => $activity['object_id'], 'owner' => $owner]);
614 Item::markForDeletion(['uri' => $activity['object_id'], 'owner-id' => $owner]);
615 Queue::remove($activity);
619 * Prepare the item array for an activity
621 * @param array $activity Activity array
622 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
623 * @throws \ImagickException
625 public static function addTag(array $activity)
627 if (empty($activity['object_content']) || empty($activity['object_id'])) {
631 foreach ($activity['receiver'] as $receiver) {
632 $item = Post::selectFirst(['id', 'uri-id', 'origin', 'author-link'], ['uri' => $activity['target_id'], 'uid' => $receiver]);
633 if (!DBA::isResult($item)) {
634 // We don't fetch missing content for this purpose
638 if (($item['author-link'] != $activity['actor']) && !$item['origin']) {
639 Logger::info('Not origin, not from the author, skipping update', ['id' => $item['id'], 'author' => $item['author-link'], 'actor' => $activity['actor']]);
643 Tag::store($item['uri-id'], Tag::HASHTAG, $activity['object_content'], $activity['object_id']);
644 Logger::info('Tagged item', ['id' => $item['id'], 'tag' => $activity['object_content'], 'uri' => $activity['target_id'], 'actor' => $activity['actor']]);
649 * Prepare the item array for an activity
651 * @param array $activity Activity array
652 * @param string $verb Activity verb
653 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
654 * @throws \ImagickException
656 public static function createActivity(array $activity, string $verb)
658 $activity['reply-to-id'] = $activity['object_id'];
659 $item = self::createItem($activity, false);
661 Logger::debug('Activity was not prepared', ['id' => $activity['object_id']]);
665 $item['verb'] = $verb;
666 $item['thr-parent'] = $activity['object_id'];
667 $item['gravity'] = Item::GRAVITY_ACTIVITY;
668 unset($item['post-type']);
669 $item['object-type'] = Activity\ObjectType::NOTE;
671 if (!empty($activity['content'])) {
672 $item['body'] = HTML::toBBCode($activity['content']);
675 $item['diaspora_signed_text'] = $activity['diaspora:like'] ?? '';
677 self::postItem($activity, $item);
681 * Fetch the Uri-Id of a post for the "featured" collection
683 * @param array $activity
686 private static function getUriIdForFeaturedCollection(array $activity)
688 $actor = APContact::getByURL($activity['actor']);
693 // Refetch the account when the "featured" collection is missing.
694 // This can be removed in a future version (end of 2022 should be good).
695 if (empty($actor['featured'])) {
696 $actor = APContact::getByURL($activity['actor'], true);
702 $parent = Post::selectFirst(['uri-id', 'author-id'], ['uri' => $activity['object_id']]);
703 if (empty($parent['uri-id'])) {
704 if (self::fetchMissingActivity($activity['object_id'], $activity, '', Receiver::COMPLETION_AUTO)) {
705 $parent = Post::selectFirst(['uri-id'], ['uri' => $activity['object_id']]);
709 if (!empty($parent['uri-id'])) {
717 * Add a post to the "Featured" collection
719 * @param array $activity
721 public static function addToFeaturedCollection(array $activity)
723 $post = self::getUriIdForFeaturedCollection($activity);
728 Logger::debug('Add post to featured collection', ['post' => $post]);
730 Post\Collection::add($post['uri-id'], Post\Collection::FEATURED, $post['author-id']);
731 Queue::remove($activity);
735 * Remove a post to the "Featured" collection
737 * @param array $activity
739 public static function removeFromFeaturedCollection(array $activity)
741 $post = self::getUriIdForFeaturedCollection($activity);
746 Logger::debug('Remove post from featured collection', ['post' => $post]);
748 Post\Collection::remove($post['uri-id'], Post\Collection::FEATURED);
749 Queue::remove($activity);
755 * @param array $activity Activity array
758 * @return int event id
761 public static function createEvent(array $activity, array $item): int
763 $event['summary'] = HTML::toBBCode($activity['name'] ?: $activity['summary']);
764 $event['desc'] = HTML::toBBCode($activity['content'] ?? '');
765 if (!empty($activity['start-time'])) {
766 $event['start'] = DateTimeFormat::utc($activity['start-time']);
768 if (!empty($activity['end-time'])) {
769 $event['finish'] = DateTimeFormat::utc($activity['end-time']);
771 $event['nofinish'] = empty($event['finish']);
772 $event['location'] = $activity['location'];
773 $event['cid'] = $item['contact-id'];
774 $event['uid'] = $item['uid'];
775 $event['uri'] = $item['uri'];
776 $event['edited'] = $item['edited'];
777 $event['private'] = $item['private'];
778 $event['guid'] = $item['guid'];
779 $event['plink'] = $item['plink'];
780 $event['network'] = $item['network'];
781 $event['protocol'] = $item['protocol'];
782 $event['direction'] = $item['direction'];
783 $event['source'] = $item['source'];
785 $ev = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
786 if (DBA::isResult($ev)) {
787 $event['id'] = $ev['id'];
790 $event_id = Event::store($event);
792 Logger::info('Event was stored', ['id' => $event_id]);
798 * Process the content
800 * @param array $activity Activity array
802 * @return array|bool Returns the item array or false if there was an unexpected occurrence
805 private static function processContent(array $activity, array $item)
807 if (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/markdown')) {
808 $item['title'] = strip_tags($activity['name'] ?? '');
809 $content = Markdown::toBBCode($activity['content']);
810 } elseif (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/bbcode')) {
811 $item['title'] = $activity['name'];
812 $content = $activity['content'];
814 // By default assume "text/html"
815 $item['title'] = HTML::toBBCode($activity['name'] ?? '');
816 $content = HTML::toBBCode($activity['content'] ?? '');
819 $item['title'] = trim(BBCode::toPlaintext($item['title']));
821 if (!empty($activity['languages'])) {
822 $item['language'] = self::processLanguages($activity['languages']);
825 if (!empty($activity['emojis'])) {
826 $content = self::replaceEmojis($item['uri-id'], $content, $activity['emojis']);
829 $content = self::addMentionLinks($content, $activity['tags']);
831 if (!empty($activity['quote-url'])) {
832 $id = Item::fetchByLink($activity['quote-url']);
834 $shared_item = Post::selectFirst(['uri-id'], ['id' => $id]);
835 $item['quote-uri-id'] = $shared_item['uri-id'];
837 Logger::info('Quote was not fetched', ['guid' => $item['guid'], 'uri-id' => $item['uri-id'], 'quote' => $activity['quote-url']]);
841 if (!empty($activity['source'])) {
842 $item['body'] = $activity['source'];
843 $item['raw-body'] = $content;
845 $quote_uri_id = Item::getQuoteUriId($item['body']);
846 if (empty($item['quote-uri-id']) && !empty($quote_uri_id)) {
847 $item['quote-uri-id'] = $quote_uri_id;
850 $item['body'] = BBCode::removeSharedData($item['body']);
852 $parent_uri = $item['parent-uri'] ?? $item['thr-parent'];
853 if (empty($activity['directmessage']) && ($parent_uri != $item['uri']) && ($item['gravity'] == Item::GRAVITY_COMMENT)) {
854 $parent = Post::selectFirst(['id', 'uri-id', 'private', 'author-link', 'alias'], ['uri' => $parent_uri]);
855 if (!DBA::isResult($parent)) {
856 Logger::warning('Unknown parent item.', ['uri' => $parent_uri]);
859 if (!empty($activity['type']) && in_array($activity['type'], Receiver::CONTENT_TYPES) && ($item['private'] == Item::PRIVATE) && ($parent['private'] != Item::PRIVATE)) {
860 Logger::warning('Item is private but the parent is not. Dropping.', ['item-uri' => $item['uri'], 'thr-parent' => $item['thr-parent']]);
864 $content = self::removeImplicitMentionsFromBody($content, $parent);
866 $item['content-warning'] = HTML::toBBCode($activity['summary'] ?? '');
867 $item['raw-body'] = $item['body'] = $content;
870 self::storeFromBody($item);
871 self::storeTags($item['uri-id'], $activity['tags']);
873 self::storeReceivers($item['uri-id'], $activity['receiver_urls'] ?? []);
875 $item['location'] = $activity['location'];
877 if (!empty($activity['latitude']) && !empty($activity['longitude'])) {
878 $item['coord'] = $activity['latitude'] . ' ' . $activity['longitude'];
881 $item['app'] = $activity['generator'];
887 * Store hashtags and mentions
891 private static function storeFromBody(array $item)
893 // Make sure to delete all existing tags (can happen when called via the update functionality)
894 DBA::delete('post-tag', ['uri-id' => $item['uri-id']]);
896 Tag::storeFromBody($item['uri-id'], $item['body'], '@!');
900 * Generate a GUID out of an URL of an ActivityPub post.
902 * @param string $url message URL
903 * @return string with GUID
905 private static function getGUIDByURL(string $url): string
907 $parsed = parse_url($url);
909 $host_hash = hash('crc32', $parsed['host']);
911 unset($parsed["scheme"]);
912 unset($parsed["host"]);
914 $path = implode("/", $parsed);
916 return $host_hash . '-'. hash('fnv164', $path) . '-'. hash('joaat', $path);
920 * Checks if an incoming message is wanted
922 * @param array $activity
924 * @return boolean Is the message wanted?
926 private static function isSolicitedMessage(array $activity, array $item): bool
928 // The checks are split to improve the support when searching why a message was accepted.
929 if (count($activity['receiver']) != 1) {
930 // The message has more than one receiver, so it is wanted.
931 Logger::debug('Message has got several receivers - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
935 if ($item['private'] == Item::PRIVATE) {
936 // We only look at public posts here. Private posts are expected to be intentionally posted to the single receiver.
937 Logger::debug('Message is private - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
941 if (!empty($activity['from-relay'])) {
942 // We check relay posts at another place. When it arrived here, the message is already checked.
943 Logger::debug('Message is a relay post that is already checked - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
947 if (in_array($activity['completion-mode'] ?? Receiver::COMPLETION_NONE, [Receiver::COMPLETION_MANUAL, Receiver::COMPLETION_ANNOUCE])) {
948 // Manual completions and completions caused by reshares are allowed without any further checks.
949 Logger::debug('Message is in completion mode - accepted', ['mode' => $activity['completion-mode'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
953 if ($item['gravity'] != Item::GRAVITY_PARENT) {
954 // We cannot reliably check at this point if a comment or activity belongs to an accepted post or needs to be fetched
955 // This can possibly be improved in the future.
956 Logger::debug('Message is no parent - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
960 $tags = array_column(Tag::getByURIId($item['uri-id'], [Tag::HASHTAG]), 'name');
961 if (Relay::isSolicitedPost($tags, $item['body'], $item['author-id'], $item['uri'], Protocol::ACTIVITYPUB, $activity['thread-completion'] ?? 0)) {
962 Logger::debug('Post is accepted because of the relay settings', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
970 * Creates an item post
972 * @param array $activity Activity data
973 * @param array $item item array
974 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
975 * @throws \ImagickException
977 public static function postItem(array $activity, array $item)
985 ksort($activity['receiver']);
987 if (!self::isSolicitedMessage($activity, $item)) {
988 DBA::delete('item-uri', ['id' => $item['uri-id']]);
989 if (!empty($activity['entry-id'])) {
990 Queue::deleteById($activity['entry-id']);
995 foreach ($activity['receiver'] as $receiver) {
996 if ($receiver == -1) {
1000 if (($receiver != 0) && empty($item['parent-uri-id']) && !empty($item['thr-parent-id'])) {
1001 $parent = Post::selectFirst(['parent-uri-id', 'parent-uri'], ['uri-id' => $item['thr-parent-id'], 'uid' => [0, $receiver]]);
1002 if (!empty($parent['parent-uri-id'])) {
1003 $item['parent-uri-id'] = $parent['parent-uri-id'];
1004 $item['parent-uri'] = $parent['parent-uri'];
1008 $item['uid'] = $receiver;
1010 $type = $activity['reception_type'][$receiver] ?? Receiver::TARGET_UNKNOWN;
1012 case Receiver::TARGET_TO:
1013 $item['post-reason'] = Item::PR_TO;
1015 case Receiver::TARGET_CC:
1016 $item['post-reason'] = Item::PR_CC;
1018 case Receiver::TARGET_BTO:
1019 $item['post-reason'] = Item::PR_BTO;
1021 case Receiver::TARGET_BCC:
1022 $item['post-reason'] = Item::PR_BCC;
1024 case Receiver::TARGET_FOLLOWER:
1025 $item['post-reason'] = Item::PR_FOLLOWER;
1027 case Receiver::TARGET_ANSWER:
1028 $item['post-reason'] = Item::PR_COMMENT;
1030 case Receiver::TARGET_GLOBAL:
1031 $item['post-reason'] = Item::PR_GLOBAL;
1034 $item['post-reason'] = Item::PR_NONE;
1037 $item['post-reason'] = Item::getPostReason($item);
1039 if (in_array($item['post-reason'], [Item::PR_GLOBAL, Item::PR_NONE])) {
1040 if (!empty($activity['from-relay'])) {
1041 $item['post-reason'] = Item::PR_RELAY;
1042 } elseif (!empty($activity['thread-completion'])) {
1043 $item['post-reason'] = Item::PR_FETCHED;
1044 } elseif (!empty($activity['push'])) {
1045 $item['post-reason'] = Item::PR_PUSHED;
1047 } elseif (($item['post-reason'] == Item::PR_FOLLOWER) && !empty($activity['from-relay'])) {
1048 // When a post arrives via a relay and we follow the author, we have to override the causer.
1049 // Otherwise the system assumes that we follow the relay. (See "addRowInformation")
1050 Logger::debug('Relay post for follower', ['receiver' => $receiver, 'guid' => $item['guid'], 'relay' => $activity['from-relay']]);
1051 $item['causer-id'] = ($item['gravity'] == Item::GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
1054 if ($item['isForum'] ?? false) {
1055 $item['contact-id'] = Contact::getIdForURL($activity['actor'], $receiver);
1057 $item['contact-id'] = Contact::getIdForURL($activity['author'], $receiver);
1060 if (($receiver != 0) && empty($item['contact-id'])) {
1061 $item['contact-id'] = Contact::getIdForURL($activity['author']);
1064 if (!empty($activity['directmessage'])) {
1065 self::postMail($activity, $item);
1069 if (($receiver != 0) && ($item['gravity'] == Item::GRAVITY_PARENT) && !in_array($item['post-reason'], [Item::PR_FOLLOWER, Item::PR_TAG, item::PR_TO, Item::PR_CC])) {
1070 if (!($item['isForum'] ?? false)) {
1071 if ($item['post-reason'] == Item::PR_BCC) {
1072 Logger::info('Top level post via BCC from a non sharer, ignoring', ['uid' => $receiver, 'contact' => $item['contact-id'], 'url' => $item['uri']]);
1076 if ((DI::pConfig()->get($receiver, 'system', 'accept_only_sharer') != Item::COMPLETION_LIKE)
1077 && in_array($activity['thread-children-type'] ?? '', Receiver::ACTIVITY_TYPES)) {
1078 Logger::info('Top level post from thread completion from a non sharer had been initiated via an activity, ignoring',
1079 ['type' => $activity['thread-children-type'], 'user' => $item['uid'], 'causer' => $item['causer-link'], 'author' => $activity['author'], 'url' => $item['uri']]);
1085 $user = User::getById($receiver, ['account-type']);
1086 if (!empty($user['account-type'])) {
1087 $is_forum = ($user['account-type'] == User::ACCOUNT_TYPE_COMMUNITY);
1090 if ((DI::pConfig()->get($receiver, 'system', 'accept_only_sharer') == Item::COMPLETION_NONE)
1091 && ((!$is_forum && !($item['isForum'] ?? false) && ($activity['type'] != 'as:Announce'))
1092 || !Contact::isSharingByURL($activity['actor'], $receiver))) {
1093 Logger::info('Actor is a non sharer, is no forum or it is no announce', ['uid' => $receiver, 'actor' => $activity['actor'], 'url' => $item['uri'], 'type' => $activity['type']]);
1097 Logger::info('Accepting post', ['uid' => $receiver, 'url' => $item['uri']]);
1100 if (!self::hasParents($item, $receiver)) {
1104 if (($item['gravity'] != Item::GRAVITY_ACTIVITY) && ($activity['object_type'] == 'as:Event')) {
1105 $event_id = self::createEvent($activity, $item);
1107 $item = Event::getItemArrayForImportedId($event_id, $item);
1110 $item_id = Item::insert($item);
1112 Logger::info('Item insertion successful', ['user' => $item['uid'], 'item_id' => $item_id]);
1115 Logger::notice('Item insertion aborted', ['uri' => $item['uri'], 'uid' => $item['uid']]);
1116 if (($item['uid'] == 0) && (count($activity['receiver']) > 1)) {
1117 Logger::info('Public item was aborted. We skip for all users.', ['uri' => $item['uri']]);
1122 if ($item['uid'] == 0) {
1127 Queue::remove($activity);
1129 if ($success && Queue::hasChildren($item['uri']) && Post::exists(['uri' => $item['uri']])) {
1130 Queue::processReplyByUri($item['uri']);
1133 // Store send a follow request for every reshare - but only when the item had been stored
1134 if ($stored && ($item['private'] != Item::PRIVATE) && ($item['gravity'] == Item::GRAVITY_PARENT) && !empty($item['author-link']) && ($item['author-link'] != $item['owner-link'])) {
1135 $author = APContact::getByURL($item['owner-link'], false);
1136 // We send automatic follow requests for reshared messages. (We don't need though for forum posts)
1137 if ($author['type'] != 'Group') {
1138 Logger::info('Send follow request', ['uri' => $item['uri'], 'stored' => $stored, 'to' => $item['author-link']]);
1139 ActivityPub\Transmitter::sendFollowObject($item['uri'], $item['author-link']);
1145 * Checks if there are parent posts for the given receiver.
1146 * If not, then the system will try to add them.
1148 * @param array $item
1149 * @param integer $receiver
1152 private static function hasParents(array $item, int $receiver)
1154 if (($receiver == 0) || ($item['gravity'] == Item::GRAVITY_PARENT)) {
1158 $fields = ['causer-id' => $item['causer-id'] ?? $item['author-id'], 'post-reason' => Item::PR_FETCHED];
1162 if ($item['verb'] != Activity::ANNOUNCE) {
1163 switch (DI::pConfig()->get($receiver, 'system', 'accept_only_sharer')) {
1164 case Item::COMPLETION_COMMENT:
1165 $add_parent = ($item['gravity'] != Item::GRAVITY_ACTIVITY);
1168 case Item::COMPLETION_NONE:
1169 $add_parent = false;
1175 $add_parent = Contact::isSharing($fields['causer-id'], $receiver);
1176 if (!$add_parent && ($item['author-id'] != $fields['causer-id'])) {
1177 $add_parent = Contact::isSharing($item['author-id'], $receiver);
1179 if (!$add_parent && !in_array($item['owner-id'], [$fields['causer-id'], $item['author-id']])) {
1180 $add_parent = Contact::isSharing($item['owner-id'], $receiver);
1184 $has_parents = false;
1186 if (!empty($item['parent-uri-id'])) {
1187 if (Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $receiver])) {
1188 $has_parents = true;
1189 } elseif ($add_parent && Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1190 $stored = Item::storeForUserByUriId($item['parent-uri-id'], $receiver, $fields);
1191 $has_parents = (bool)$stored;
1193 Logger::notice('Inserted missing parent post', ['stored' => $stored, 'uid' => $receiver, 'parent' => $item['parent-uri']]);
1195 Logger::notice('Parent could not be added.', ['uid' => $receiver, 'uri' => $item['uri'], 'parent' => $item['parent-uri']]);
1198 } elseif ($add_parent) {
1199 Logger::debug('Parent does not exist.', ['uid' => $receiver, 'uri' => $item['uri'], 'parent' => $item['parent-uri']]);
1201 Logger::debug('Parent should not be added.', ['uid' => $receiver, 'gravity' => $item['gravity'], 'verb' => $item['verb'], 'guid' => $item['guid'], 'uri' => $item['uri'], 'parent' => $item['parent-uri']]);
1205 if (empty($item['parent-uri-id']) || ($item['thr-parent-id'] != $item['parent-uri-id'])) {
1206 if (Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $receiver])) {
1207 $has_parents = true;
1208 } elseif (($has_parents || $add_parent) && Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => 0])) {
1209 $stored = Item::storeForUserByUriId($item['thr-parent-id'], $receiver, $fields);
1210 $has_parents = $has_parents || (bool)$stored;
1212 Logger::notice('Inserted missing thread parent post', ['stored' => $stored, 'uid' => $receiver, 'thread-parent' => $item['thr-parent']]);
1214 Logger::notice('Thread parent could not be added.', ['uid' => $receiver, 'uri' => $item['uri'], 'thread-parent' => $item['thr-parent']]);
1216 } elseif ($add_parent) {
1217 Logger::debug('Thread parent does not exist.', ['uid' => $receiver, 'uri' => $item['uri'], 'thread-parent' => $item['thr-parent']]);
1219 Logger::debug('Thread parent should not be added.', ['uid' => $receiver, 'gravity' => $item['gravity'], 'verb' => $item['verb'], 'guid' => $item['guid'], 'uri' => $item['uri'], 'thread-parent' => $item['thr-parent']]);
1223 return $has_parents;
1227 * Store tags and mentions into the tag table
1229 * @param integer $uriid
1230 * @param array $tags
1232 private static function storeTags(int $uriid, array $tags = null)
1234 foreach ($tags as $tag) {
1235 if (empty($tag['name']) || empty($tag['type']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
1239 $hash = substr($tag['name'], 0, 1);
1241 if ($tag['type'] == 'Mention') {
1242 if (in_array($hash, [Tag::TAG_CHARACTER[Tag::MENTION],
1243 Tag::TAG_CHARACTER[Tag::EXCLUSIVE_MENTION],
1244 Tag::TAG_CHARACTER[Tag::IMPLICIT_MENTION]])) {
1245 $tag['name'] = substr($tag['name'], 1);
1247 $type = Tag::IMPLICIT_MENTION;
1249 if (!empty($tag['href'])) {
1250 $apcontact = APContact::getByURL($tag['href']);
1251 if (!empty($apcontact['name']) || !empty($apcontact['nick'])) {
1252 $tag['name'] = $apcontact['name'] ?: $apcontact['nick'];
1255 } elseif ($tag['type'] == 'Hashtag') {
1256 if ($hash == Tag::TAG_CHARACTER[Tag::HASHTAG]) {
1257 $tag['name'] = substr($tag['name'], 1);
1259 $type = Tag::HASHTAG;
1262 if (empty($tag['name'])) {
1266 Tag::store($uriid, $type, $tag['name'], $tag['href']);
1270 public static function storeReceivers(int $uriid, array $receivers)
1272 foreach (['as:to' => Tag::TO, 'as:cc' => Tag::CC, 'as:bto' => Tag::BTO, 'as:bcc' => Tag::BCC] as $element => $type) {
1273 if (!empty($receivers[$element])) {
1274 foreach ($receivers[$element] as $receiver) {
1275 if ($receiver == ActivityPub::PUBLIC_COLLECTION) {
1276 $name = Receiver::PUBLIC_COLLECTION;
1277 } elseif ($path = parse_url($receiver, PHP_URL_PATH)) {
1278 $name = trim($path, '/');
1280 Logger::warning('Unable to coerce name from receiver', ['receiver' => $receiver]);
1284 $target = Tag::getTargetType($receiver);
1285 Logger::debug('Got target type', ['type' => $target, 'url' => $receiver]);
1286 Tag::store($uriid, $type, $name, $receiver, $target);
1293 * Creates an mail post
1295 * @param array $activity Activity data
1296 * @param array $item item array
1297 * @return int|bool New mail table row id or false on error
1298 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1300 private static function postMail(array $activity, array $item)
1302 if (($item['gravity'] != Item::GRAVITY_PARENT) && !DBA::exists('mail', ['uri' => $item['thr-parent'], 'uid' => $item['uid']])) {
1303 Logger::info('Parent not found, mail will be discarded.', ['uid' => $item['uid'], 'uri' => $item['thr-parent']]);
1307 Logger::info('Direct Message', $item);
1310 $msg['uid'] = $item['uid'];
1312 $msg['contact-id'] = $item['contact-id'];
1314 $contact = Contact::getById($item['contact-id'], ['name', 'url', 'photo']);
1315 $msg['from-name'] = $contact['name'];
1316 $msg['from-url'] = $contact['url'];
1317 $msg['from-photo'] = $contact['photo'];
1319 $msg['uri'] = $item['uri'];
1320 $msg['created'] = $item['created'];
1322 $parent = DBA::selectFirst('mail', ['parent-uri', 'title'], ['uri' => $item['thr-parent']]);
1323 if (DBA::isResult($parent)) {
1324 $msg['parent-uri'] = $parent['parent-uri'];
1325 $msg['title'] = $parent['title'];
1327 $msg['parent-uri'] = $item['thr-parent'];
1329 if (!empty($item['title'])) {
1330 $msg['title'] = $item['title'];
1331 } elseif (!empty($item['content-warning'])) {
1332 $msg['title'] = $item['content-warning'];
1334 // Trying to generate a title out of the body
1335 $title = $item['body'];
1337 while (preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $title, $matches)) {
1338 $title = $matches[3];
1341 $title = trim(BBCode::toPlaintext($title));
1343 if (strlen($title) > 20) {
1344 $title = substr($title, 0, 20) . '...';
1347 $msg['title'] = $title;
1350 $msg['body'] = $item['body'];
1352 return Mail::insert($msg);
1356 * Fetch featured posts from a contact with the given url
1358 * @param string $url
1361 public static function fetchFeaturedPosts(string $url)
1363 Logger::info('Fetch featured posts', ['contact' => $url]);
1365 $apcontact = APContact::getByURL($url);
1366 if (empty($apcontact['featured'])) {
1367 Logger::info('Contact does not have a featured collection', ['contact' => $url]);
1371 $pcid = Contact::getIdForURL($url, 0, false);
1373 Logger::notice('Contact not found', ['contact' => $url]);
1377 $posts = Post\Collection::selectToArrayForContact($pcid, Post\Collection::FEATURED);
1378 if (!empty($posts)) {
1379 $old_featured = array_column($posts, 'uri-id');
1384 $featured = ActivityPub::fetchItems($apcontact['featured']);
1385 if (empty($featured)) {
1386 Logger::info('Contact does not have featured posts', ['contact' => $url]);
1388 foreach ($old_featured as $uri_id) {
1389 Post\Collection::remove($uri_id, Post\Collection::FEATURED);
1390 Logger::debug('Removed no longer featured post', ['uri-id' => $uri_id, 'contact' => $url]);
1398 foreach ($featured as $post) {
1399 if (empty($post['id'])) {
1402 $id = Item::fetchByLink($post['id']);
1404 $item = Post::selectFirst(['uri-id', 'featured', 'author-id'], ['id' => $id]);
1405 if (!empty($item['uri-id'])) {
1406 if (!$item['featured']) {
1407 Post\Collection::add($item['uri-id'], Post\Collection::FEATURED, $item['author-id']);
1408 Logger::debug('Added featured post', ['uri-id' => $item['uri-id'], 'contact' => $url]);
1411 Logger::debug('Post already had been featured', ['uri-id' => $item['uri-id'], 'contact' => $url]);
1415 $index = array_search($item['uri-id'], $old_featured);
1416 if (!($index === false)) {
1417 unset($old_featured[$index]);
1423 foreach ($old_featured as $uri_id) {
1424 Post\Collection::remove($uri_id, Post\Collection::FEATURED);
1425 Logger::debug('Removed no longer featured post', ['uri-id' => $uri_id, 'contact' => $url]);
1428 Logger::info('Fetched featured posts', ['new' => $new, 'old' => $old, 'contact' => $url]);
1431 public static function fetchCachedActivity(string $url, int $uid): array
1433 $cachekey = self::CACHEKEY_FETCH_ACTIVITY . $uid . ':' . hash('sha256', $url);
1434 $object = DI::cache()->get($cachekey);
1436 if (!is_null($object)) {
1437 if (!empty($object)) {
1438 Logger::debug('Fetch from cache', ['url' => $url, 'uid' => $uid]);
1440 Logger::debug('Fetch from negative cache', ['url' => $url, 'uid' => $uid]);
1445 $object = ActivityPub::fetchContent($url, $uid);
1446 if (empty($object)) {
1447 Logger::notice('Activity was not fetchable, aborting.', ['url' => $url, 'uid' => $uid]);
1448 // We perform negative caching.
1449 DI::cache()->set($cachekey, [], Duration::FIVE_MINUTES);
1453 if (empty($object['id'])) {
1454 Logger::notice('Activity has got not id, aborting. ', ['url' => $url, 'object' => $object]);
1457 DI::cache()->set($cachekey, $object, Duration::FIVE_MINUTES);
1459 Logger::debug('Activity was fetched successfully', ['url' => $url, 'uid' => $uid]);
1465 * Fetches missing posts
1467 * @param string $url message URL
1468 * @param array $child activity array with the child of this message
1469 * @param string $relay_actor Relay actor
1470 * @param int $completion Completion mode, see Receiver::COMPLETION_*
1471 * @param int $uid User id that is used to fetch the activity
1472 * @return string fetched message URL
1473 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1474 * @throws \ImagickException
1476 public static function fetchMissingActivity(string $url, array $child = [], string $relay_actor = '', int $completion = Receiver::COMPLETION_MANUAL, int $uid = 0): string
1478 $object = self::fetchCachedActivity($url, $uid);
1479 if (empty($object)) {
1485 if (!empty($object['attributedTo'])) {
1486 $attributed_to = $object['attributedTo'];
1487 if (is_array($attributed_to)) {
1488 $compacted = JsonLD::compact($object);
1489 $attributed_to = JsonLD::fetchElement($compacted, 'as:attributedTo', '@id');
1491 $signer[] = $attributed_to;
1494 if (!empty($object['actor'])) {
1495 $object_actor = $object['actor'];
1496 } elseif (!empty($attributed_to)) {
1497 $object_actor = $attributed_to;
1503 $signer[] = $object_actor;
1505 if (!empty($child['author'])) {
1506 $actor = $child['author'];
1509 $actor = $object_actor;
1512 if (!empty($object['published'])) {
1513 $published = $object['published'];
1514 } elseif (!empty($child['published'])) {
1515 $published = $child['published'];
1517 $published = DateTimeFormat::utcNow();
1521 $activity['@context'] = $object['@context'] ?? ActivityPub::CONTEXT;
1522 unset($object['@context']);
1523 $activity['id'] = $object['id'];
1524 $activity['to'] = $object['to'] ?? [];
1525 $activity['cc'] = $object['cc'] ?? [];
1526 $activity['actor'] = $actor;
1527 $activity['object'] = $object;
1528 $activity['published'] = $published;
1529 $activity['type'] = 'Create';
1531 $ldactivity = JsonLD::compact($activity);
1533 $ldactivity['recursion-depth'] = !empty($child['recursion-depth']) ? $child['recursion-depth'] + 1 : 0;
1535 if ($object_actor != $actor) {
1536 Contact::updateByUrlIfNeeded($object_actor);
1539 Contact::updateByUrlIfNeeded($actor);
1541 if (!empty($child['thread-completion'])) {
1542 $ldactivity['thread-completion'] = $child['thread-completion'];
1543 $ldactivity['completion-mode'] = $child['completion-mode'] ?? Receiver::COMPLETION_NONE;
1545 $ldactivity['thread-completion'] = Contact::getIdForURL($relay_actor ?: $actor);
1546 $ldactivity['completion-mode'] = $completion;
1549 if ($completion == Receiver::COMPLETION_RELAY) {
1550 $ldactivity['from-relay'] = $ldactivity['thread-completion'];
1551 if (!self::acceptIncomingMessage($ldactivity, $object['id'])) {
1556 if (!empty($child['thread-children-type'])) {
1557 $ldactivity['thread-children-type'] = $child['thread-children-type'];
1558 } elseif (!empty($child['type'])) {
1559 $ldactivity['thread-children-type'] = $child['type'];
1561 $ldactivity['thread-children-type'] = 'as:Create';
1564 if (($completion == Receiver::COMPLETION_RELAY) && Queue::exists($url, 'as:Create')) {
1565 Logger::notice('Activity has already been queued.', ['url' => $url, 'object' => $activity['id']]);
1566 } elseif (ActivityPub\Receiver::processActivity($ldactivity, json_encode($activity), $uid, true, false, $signer, '', $completion)) {
1567 Logger::notice('Activity had been fetched and processed.', ['url' => $url, 'entry' => $child['entry-id'] ?? 0, 'completion' => $completion, 'object' => $activity['id']]);
1569 Logger::notice('Activity had been fetched and will be processed later.', ['url' => $url, 'entry' => $child['entry-id'] ?? 0, 'completion' => $completion, 'object' => $activity['id']]);
1572 return $activity['id'];
1576 * Test if incoming relay messages should be accepted
1578 * @param array $activity activity array
1579 * @param string $id object ID
1580 * @return boolean true if message is accepted
1582 private static function acceptIncomingMessage(array $activity, string $id): bool
1584 if (empty($activity['as:object'])) {
1585 Logger::info('No object field in activity - accepted', ['id' => $id]);
1589 $replyto = JsonLD::fetchElement($activity['as:object'], 'as:inReplyTo', '@id');
1590 $uriid = ItemURI::getIdByURI($replyto ?? '');
1591 if (Post::exists(['uri-id' => $uriid])) {
1592 Logger::info('Post is a reply to an existing post - accepted', ['id' => $id, 'uri-id' => $uriid, 'replyto' => $replyto]);
1596 $attributed_to = JsonLD::fetchElement($activity['as:object'], 'as:attributedTo', '@id');
1597 $authorid = Contact::getIdForURL($attributed_to);
1599 $body = HTML::toBBCode(JsonLD::fetchElement($activity['as:object'], 'as:content', '@value') ?? '');
1602 $tags = Receiver::processTags(JsonLD::fetchElementArray($activity['as:object'], 'as:tag') ?? []);
1603 if (!empty($tags)) {
1604 foreach ($tags as $tag) {
1605 if ($tag['type'] != 'Hashtag') {
1608 $messageTags[] = ltrim(mb_strtolower($tag['name']), '#');
1612 return Relay::isSolicitedPost($messageTags, $body, $authorid, $id, Protocol::ACTIVITYPUB, $activity['thread-completion'] ?? 0);
1616 * perform a "follow" request
1618 * @param array $activity
1620 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1621 * @throws \ImagickException
1623 public static function followUser(array $activity)
1625 $uid = User::getIdForURL($activity['object_id']);
1627 Queue::remove($activity);
1631 $owner = User::getOwnerDataById($uid);
1632 if (empty($owner)) {
1636 $cid = Contact::getIdForURL($activity['actor'], $uid);
1638 self::switchContact($cid);
1639 Contact::update(['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
1643 'author-id' => Contact::getIdForURL($activity['actor']),
1644 'author-link' => $activity['actor'],
1647 // Ensure that the contact has got the right network type
1648 self::switchContact($item['author-id']);
1650 $result = Contact::addRelationship($owner, [], $item, false, $activity['content'] ?? '');
1651 if ($result === true) {
1652 ActivityPub\Transmitter::sendContactAccept($item['author-link'], $activity['id'], $owner['uid']);
1655 $cid = Contact::getIdForURL($activity['actor'], $uid);
1660 if ($result && DI::config()->get('system', 'transmit_pending_events') && ($owner['contact-type'] == Contact::TYPE_COMMUNITY)) {
1661 self::transmitPendingEvents($cid, $owner['uid']);
1664 if (empty($contact)) {
1665 Contact::update(['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
1667 Logger::notice('Follow user ' . $uid . ' from contact ' . $cid . ' with id ' . $activity['id']);
1668 Queue::remove($activity);
1672 * Transmit pending events to the new follower
1674 * @param integer $cid Contact id
1675 * @param integer $uid User id
1678 private static function transmitPendingEvents(int $cid, int $uid)
1680 $account = DBA::selectFirst('account-user-view', ['ap-inbox', 'ap-sharedinbox'], ['id' => $cid]);
1681 $inbox = $account['ap-sharedinbox'] ?: $account['ap-inbox'];
1683 $events = DBA::select('event', ['id'], ["`uid` = ? AND `start` > ? AND `type` != ?", $uid, DateTimeFormat::utcNow(), 'birthday']);
1684 while ($event = DBA::fetch($events)) {
1685 $post = Post::selectFirst(['id', 'uri-id', 'created'], ['event-id' => $event['id']]);
1689 if (DI::config()->get('system', 'bulk_delivery')) {
1690 Post\Delivery::add($post['uri-id'], $uid, $inbox, $post['created'], Delivery::POST, [$cid]);
1691 Worker::add(Worker::PRIORITY_HIGH, 'APDelivery', '', 0, $inbox, 0);
1693 Worker::add(Worker::PRIORITY_HIGH, 'APDelivery', Delivery::POST, $post['id'], $inbox, $uid, [$cid], $post['uri-id']);
1699 * Update the given profile
1701 * @param array $activity
1702 * @throws \Exception
1704 public static function updatePerson(array $activity)
1706 if (empty($activity['object_id'])) {
1710 Logger::info('Updating profile', ['object' => $activity['object_id']]);
1711 Contact::updateFromProbeByURL($activity['object_id']);
1712 Queue::remove($activity);
1716 * Delete the given profile
1718 * @param array $activity
1720 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1722 public static function deletePerson(array $activity)
1724 if (empty($activity['object_id']) || empty($activity['actor'])) {
1725 Logger::info('Empty object id or actor.');
1726 Queue::remove($activity);
1730 if ($activity['object_id'] != $activity['actor']) {
1731 Logger::info('Object id does not match actor.');
1732 Queue::remove($activity);
1736 $contacts = DBA::select('contact', ['id'], ['nurl' => Strings::normaliseLink($activity['object_id'])]);
1737 while ($contact = DBA::fetch($contacts)) {
1738 Contact::remove($contact['id']);
1740 DBA::close($contacts);
1742 Logger::info('Deleted contact', ['object' => $activity['object_id']]);
1743 Queue::remove($activity);
1747 * Add moved contacts as followers for all subscribers of the old contact
1749 * @param array $activity
1751 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1753 public static function movePerson(array $activity)
1755 if (empty($activity['target_id']) || empty($activity['object_id'])) {
1756 Queue::remove($activity);
1760 if ($activity['object_id'] != $activity['actor']) {
1761 Logger::notice('Object is not the actor', ['activity' => $activity]);
1762 Queue::remove($activity);
1766 $from = Contact::getByURL($activity['object_id'], false, ['uri-id']);
1767 if (empty($from['uri-id'])) {
1768 Logger::info('Object not found', ['activity' => $activity]);
1769 Queue::remove($activity);
1773 $contacts = DBA::select('contact', ['uid', 'url'], ["`uri-id` = ? AND `uid` != ? AND `rel` IN (?, ?)", $from['uri-id'], 0, Contact::FRIEND, Contact::SHARING]);
1774 while ($from_contact = DBA::fetch($contacts)) {
1775 $result = Contact::createFromProbeForUser($from_contact['uid'], $activity['target_id']);
1776 Logger::debug('Follower added', ['from' => $from_contact, 'result' => $result]);
1778 DBA::close($contacts);
1779 Queue::remove($activity);
1783 * Blocks the user by the contact
1785 * @param array $activity
1787 * @throws \Exception
1789 public static function blockAccount(array $activity)
1791 $cid = Contact::getIdForURL($activity['actor']);
1796 $uid = User::getIdForURL($activity['object_id']);
1801 Contact\User::setIsBlocked($cid, $uid, true);
1803 Logger::info('Contact blocked user', ['contact' => $cid, 'user' => $uid]);
1804 Queue::remove($activity);
1808 * Unblocks the user by the contact
1810 * @param array $activity
1812 * @throws \Exception
1814 public static function unblockAccount(array $activity)
1816 $cid = Contact::getIdForURL($activity['actor']);
1821 $uid = User::getIdForURL($activity['object_object']);
1826 Contact\User::setIsBlocked($cid, $uid, false);
1828 Logger::info('Contact unblocked user', ['contact' => $cid, 'user' => $uid]);
1829 Queue::remove($activity);
1835 * @param array $activity
1837 * @throws \Exception
1839 public static function ReportAccount(array $activity)
1841 $account_id = Contact::getIdForURL($activity['object_id']);
1842 if (empty($account_id)) {
1843 Logger::info('Unknown account', ['activity' => $activity]);
1844 Queue::remove($activity);
1848 $reporter_id = Contact::getIdForURL($activity['actor']);
1849 if (empty($reporter_id)) {
1850 Logger::info('Unknown actor', ['activity' => $activity]);
1851 Queue::remove($activity);
1856 foreach ($activity['object_ids'] as $status_id) {
1857 $post = Post::selectFirst(['uri-id'], ['uri' => $status_id]);
1858 if (!empty($post['uri-id'])) {
1859 $uri_ids[] = $post['uri-id'];
1863 $report = DI::reportFactory()->createFromReportsRequest($reporter_id, $account_id, $activity['content'], null, '', false, $uri_ids);
1864 DI::report()->save($report);
1866 Logger::info('Stored report', ['reporter' => $reporter_id, 'account_id' => $account_id, 'comment' => $activity['content'], 'object_ids' => $activity['object_ids']]);
1870 * Accept a follow request
1872 * @param array $activity
1873 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1874 * @throws \ImagickException
1876 public static function acceptFollowUser(array $activity)
1878 if (!empty($activity['object_actor'])) {
1879 $uid = User::getIdForURL($activity['object_actor']);
1881 } elseif (!empty($activity['receiver']) && (count($activity['receiver']) == 1)) {
1882 $uid = array_shift($activity['receiver']);
1887 Logger::notice('User could not be detected', ['activity' => $activity]);
1888 Queue::remove($activity);
1892 $cid = Contact::getIdForURL($activity['actor'], $uid);
1894 Logger::notice('No contact found', ['actor' => $activity['actor']]);
1895 Queue::remove($activity);
1899 $id = Transmitter::activityIDFromContact($cid);
1900 if ($id == $activity['object_id']) {
1901 Logger::info('Successful id check', ['uid' => $uid, 'cid' => $cid]);
1903 Logger::info('Unsuccessful id check', ['uid' => $uid, 'cid' => $cid, 'id' => $id, 'object_id' => $activity['object_id']]);
1905 Queue::remove($activity);
1910 self::switchContact($cid);
1912 $fields = ['pending' => false];
1914 $contact = DBA::selectFirst('contact', ['rel'], ['id' => $cid]);
1915 if ($contact['rel'] == Contact::FOLLOWER) {
1916 $fields['rel'] = Contact::FRIEND;
1919 $condition = ['id' => $cid];
1920 Contact::update($fields, $condition);
1921 Logger::info('Accept contact request', ['contact' => $cid, 'user' => $uid]);
1922 Queue::remove($activity);
1926 * Reject a follow request
1928 * @param array $activity
1929 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1930 * @throws \ImagickException
1932 public static function rejectFollowUser(array $activity)
1934 $uid = User::getIdForURL($activity['object_actor']);
1939 $cid = Contact::getIdForURL($activity['actor'], $uid);
1941 Logger::info('No contact found', ['actor' => $activity['actor']]);
1945 self::switchContact($cid);
1947 $contact = Contact::getById($cid, ['rel']);
1948 if ($contact['rel'] == Contact::SHARING) {
1949 Contact::remove($cid);
1950 Logger::info('Rejected contact request - contact removed', ['contact' => $cid, 'user' => $uid]);
1951 } elseif ($contact['rel'] == Contact::FRIEND) {
1952 Contact::update(['rel' => Contact::FOLLOWER], ['id' => $cid]);
1954 Logger::info('Rejected contact request', ['contact' => $cid, 'user' => $uid]);
1956 Queue::remove($activity);
1960 * Undo activity like "like" or "dislike"
1962 * @param array $activity
1963 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1964 * @throws \ImagickException
1966 public static function undoActivity(array $activity)
1968 if (empty($activity['object_id'])) {
1972 if (empty($activity['object_actor'])) {
1976 $author_id = Contact::getIdForURL($activity['object_actor']);
1977 if (empty($author_id)) {
1981 Item::markForDeletion(['uri' => $activity['object_id'], 'author-id' => $author_id, 'gravity' => Item::GRAVITY_ACTIVITY]);
1982 Queue::remove($activity);
1986 * Activity to remove a follower
1988 * @param array $activity
1989 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1990 * @throws \ImagickException
1992 public static function undoFollowUser(array $activity)
1994 $uid = User::getIdForURL($activity['object_object']);
1999 $owner = User::getOwnerDataById($uid);
2000 if (empty($owner)) {
2004 $cid = Contact::getIdForURL($activity['actor'], $uid);
2006 Logger::info('No contact found', ['actor' => $activity['actor']]);
2010 self::switchContact($cid);
2012 $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
2013 if (!DBA::isResult($contact)) {
2017 Contact::removeFollower($contact);
2018 Logger::info('Undo following request', ['contact' => $cid, 'user' => $uid]);
2019 Queue::remove($activity);
2023 * Switches a contact to AP if needed
2025 * @param integer $cid Contact ID
2027 * @throws \Exception
2029 private static function switchContact(int $cid)
2031 $contact = DBA::selectFirst('contact', ['network', 'url'], ['id' => $cid]);
2032 if (!DBA::isResult($contact) || in_array($contact['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN]) || Contact::isLocal($contact['url'])) {
2036 Logger::info('Change existing contact', ['cid' => $cid, 'previous' => $contact['network']]);
2037 Contact::updateFromProbe($cid);
2041 * Collects implicit mentions like:
2042 * - the author of the parent item
2043 * - all the mentioned conversants in the parent item
2045 * @param array $parent Item array with at least ['id', 'author-link', 'alias']
2047 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2049 private static function getImplicitMentionList(array $parent): array
2051 $parent_terms = Tag::getByURIId($parent['uri-id'], [Tag::MENTION, Tag::IMPLICIT_MENTION, Tag::EXCLUSIVE_MENTION]);
2053 $parent_author = Contact::getByURL($parent['author-link'], false, ['url', 'nurl', 'alias']);
2055 $implicit_mentions = [];
2056 if (empty($parent_author['url'])) {
2057 Logger::notice('Author public contact unknown.', ['author-link' => $parent['author-link'], 'parent-id' => $parent['id']]);
2059 $implicit_mentions[] = $parent_author['url'];
2060 $implicit_mentions[] = $parent_author['nurl'];
2061 $implicit_mentions[] = $parent_author['alias'];
2064 if (!empty($parent['alias'])) {
2065 $implicit_mentions[] = $parent['alias'];
2068 foreach ($parent_terms as $term) {
2069 $contact = Contact::getByURL($term['url'], false, ['url', 'nurl', 'alias']);
2070 if (!empty($contact['url'])) {
2071 $implicit_mentions[] = $contact['url'];
2072 $implicit_mentions[] = $contact['nurl'];
2073 $implicit_mentions[] = $contact['alias'];
2077 return $implicit_mentions;
2081 * Strips from the body prepended implicit mentions
2083 * @param string $body
2084 * @param array $parent
2087 private static function removeImplicitMentionsFromBody(string $body, array $parent): string
2089 if (DI::config()->get('system', 'disable_implicit_mentions')) {
2093 $potential_mentions = self::getImplicitMentionList($parent);
2095 $kept_mentions = [];
2097 // Extract one prepended mention at a time from the body
2098 while(preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $body, $matches)) {
2099 if (!in_array($matches[2], $potential_mentions)) {
2100 $kept_mentions[] = $matches[1];
2103 $body = $matches[3];
2106 // Re-appending the kept mentions to the body after extraction
2107 $kept_mentions[] = $body;
2109 return implode('', $kept_mentions);
2113 * Adds links to string mentions
2115 * @param string $body
2116 * @param array $tags
2119 protected static function addMentionLinks(string $body, array $tags): string
2121 // This prevents links to be added again to Pleroma-style mention links
2122 $body = self::normalizeMentionLinks($body);
2124 $body = BBCode::performWithEscapedTags($body, ['url'], function ($body) use ($tags) {
2125 foreach ($tags as $tag) {
2126 if (empty($tag['name']) || empty($tag['type']) || empty($tag['href']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
2130 $hash = substr($tag['name'], 0, 1);
2131 $name = substr($tag['name'], 1);
2132 if (!in_array($hash, Tag::TAG_CHARACTER)) {
2134 $name = $tag['name'];
2137 if (Network::isValidHttpUrl($tag['href'])) {
2138 $body = str_replace($tag['name'], $hash . '[url=' . $tag['href'] . ']' . $name . '[/url]', $body);
2149 * Create an item array from client to server object data
2151 * @param array $object_data
2152 * @param array $application
2153 * @param integer $uid
2156 public static function processC2SContent(array $object_data, array $application, int $uid): array
2158 $owner = User::getOwnerDataById($uid);
2162 $item['network'] = Protocol::DFRN;
2163 $item['uid'] = $uid;
2164 $item['verb'] = Activity::POST;
2165 $item['contact-id'] = $owner['id'];
2166 $item['author-id'] = $item['owner-id'] = Contact::getPublicIdByUserId($uid);
2167 $item['title'] = $object_data['name'];
2168 $item['body'] = Markdown::toBBCode($object_data['content']);
2169 $item['app'] = $application['name'] ?? 'API';
2171 if (!empty($object_data['target'][Receiver::TARGET_GLOBAL])) {
2172 $item['allow_cid'] = '';
2173 $item['allow_gid'] = '';
2174 $item['deny_cid'] = '';
2175 $item['deny_gid'] = '';
2176 $item['private'] = Item::PUBLIC;
2177 } elseif (isset($object_data['target'][Receiver::TARGET_GLOBAL])) {
2178 $item['allow_cid'] = '';
2179 $item['allow_gid'] = '';
2180 $item['deny_cid'] = '';
2181 $item['deny_gid'] = '';
2182 $item['private'] = Item::UNLISTED;
2183 } elseif (!empty($object_data['target'][Receiver::TARGET_FOLLOWER])) {
2184 $item['allow_cid'] = '';
2185 $item['allow_gid'] = '<' . Group::FOLLOWERS . '>';
2186 $item['deny_cid'] = '';
2187 $item['deny_gid'] = '';
2188 $item['private'] = Item::PRIVATE;
2190 // @todo Set permissions via the $object_data['target'] array
2191 $item['allow_cid'] = '<' . $owner['id'] . '>';
2192 $item['allow_gid'] = '';
2193 $item['deny_cid'] = '';
2194 $item['deny_gid'] = '';
2195 $item['private'] = Item::PRIVATE;
2198 if (!empty($object_data['summary'])) {
2199 $item['body'] = '[abstract=' . Protocol::ACTIVITYPUB . ']' . $object_data['summary'] . "[/abstract]\n" . $item['body'];
2202 if ($object_data['reply-to-id']) {
2203 $item['thr-parent'] = $object_data['reply-to-id'];
2204 $item['gravity'] = Item::GRAVITY_COMMENT;
2206 $item['gravity'] = Item::GRAVITY_PARENT;
2209 $item = DI::contentItem()->expandTags($item);