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\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\GServer;
39 use Friendica\Model\Item;
40 use Friendica\Model\ItemURI;
41 use Friendica\Model\Mail;
42 use Friendica\Model\Tag;
43 use Friendica\Model\User;
44 use Friendica\Model\Post;
45 use Friendica\Protocol\Activity;
46 use Friendica\Protocol\ActivityPub;
47 use Friendica\Protocol\Relay;
48 use Friendica\Util\DateTimeFormat;
49 use Friendica\Util\HTTPSignature;
50 use Friendica\Util\JsonLD;
51 use Friendica\Util\Network;
52 use Friendica\Util\Strings;
53 use Friendica\Worker\Delivery;
56 * ActivityPub Processor Protocol class
60 const CACHEKEY_FETCH_ACTIVITY = 'processor:fetchMissingActivity:';
61 const CACHEKEY_JUST_FETCHED = 'processor:isJustFetched:';
64 * Add an object id to the list of processed ids
70 private static function addActivityId(string $id)
72 DBA::delete('processed-activity', ["`received` < ?", DateTimeFormat::utc('now - 5 minutes')]);
73 DBA::insert('processed-activity', ['object-id' => $id, 'received' => DateTimeFormat::utcNow()]);
77 * Checks if the given object id has just been processed
83 private static function isProcessed(string $id): bool
85 return DBA::exists('processed-activity', ['object-id' => $id]);
89 * Extracts the tag character (#, @, !) from mention links
94 protected static function normalizeMentionLinks(string $body): string
96 return preg_replace('%\[url=([^\[\]]*)]([#@!])(.*?)\[/url]%ism', '$2[url=$1]$3[/url]', $body);
100 * Convert the language array into a language JSON
102 * @param array $languages
103 * @return string language JSON
105 private static function processLanguages(array $languages): string
107 $codes = array_keys($languages);
109 foreach ($codes as $code) {
117 return json_encode($lang);
120 * Replaces emojis in the body
123 * @param string $body
124 * @param array $emojis
126 * @return string with replaced emojis
128 private static function replaceEmojis(int $uri_id, string $body, array $emojis): string
132 array_column($emojis, 'name'),
133 array_map(function ($emoji) {
134 return '[emoji=' . $emoji['href'] . ']' . $emoji['name'] . '[/emoji]';
139 // We store the emoji here to be able to avoid storing it in the media
140 foreach ($emojis as $emoji) {
141 Post\Link::getByLink($uri_id, $emoji['href']);
147 * Store attached media files in the post-media table
150 * @param array $attachment
153 private static function storeAttachmentAsMedia(int $uriid, array $attachment)
155 if (empty($attachment['url'])) {
159 $data = ['uri-id' => $uriid];
160 $data['type'] = Post\Media::UNKNOWN;
161 $data['url'] = $attachment['url'];
162 $data['mimetype'] = $attachment['mediaType'] ?? null;
163 $data['height'] = $attachment['height'] ?? null;
164 $data['width'] = $attachment['width'] ?? null;
165 $data['size'] = $attachment['size'] ?? null;
166 $data['preview'] = $attachment['image'] ?? null;
167 $data['description'] = $attachment['name'] ?? null;
169 Post\Media::insert($data);
173 * Stire attachment data
175 * @param array $activity
178 private static function storeAttachments(array $activity, array $item)
180 if (empty($activity['attachments'])) {
184 foreach ($activity['attachments'] as $attach) {
185 self::storeAttachmentAsMedia($item['uri-id'], $attach);
190 * Store attachment data
192 * @param array $activity
195 private static function storeQuestion(array $activity, array $item)
197 if (empty($activity['question'])) {
200 $question = ['multiple' => $activity['question']['multiple']];
202 if (!empty($activity['question']['voters'])) {
203 $question['voters'] = $activity['question']['voters'];
206 if (!empty($activity['question']['end-time'])) {
207 $question['end-time'] = DateTimeFormat::utc($activity['question']['end-time']);
210 Post\Question::update($item['uri-id'], $question);
212 foreach ($activity['question']['options'] as $key => $option) {
213 $option = ['name' => $option['name'], 'replies' => $option['replies']];
214 Post\QuestionOption::update($item['uri-id'], $key, $option);
217 Logger::debug('Storing incoming question', ['type' => $activity['type'], 'uri-id' => $item['uri-id'], 'question' => $activity['question']]);
223 * @param array $activity Activity array
224 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
225 * @throws \ImagickException
227 public static function updateItem(array $activity)
229 $item = Post::selectFirst(['uri', 'uri-id', 'thr-parent', 'gravity', 'post-type', 'private'], ['uri' => $activity['id']]);
230 if (!DBA::isResult($item)) {
231 Logger::warning('No existing item, item will be created', ['uri' => $activity['id']]);
232 $item = self::createItem($activity, false);
234 Queue::remove($activity);
238 self::postItem($activity, $item);
242 $item['changed'] = DateTimeFormat::utcNow();
243 $item['edited'] = DateTimeFormat::utc($activity['updated']);
245 $item = self::processContent($activity, $item);
247 Queue::remove($activity);
251 self::storeAttachments($activity, $item);
252 self::storeQuestion($activity, $item);
254 Post\History::add($item['uri-id'], $item);
255 Item::update($item, ['uri' => $activity['id']]);
257 Queue::remove($activity);
259 if ($activity['object_type'] == 'as:Event') {
260 $posts = Post::select(['event-id', 'uid'], ["`uri` = ? AND `event-id` > ?", $activity['id'], 0]);
261 while ($post = DBA::fetch($posts)) {
262 self::updateEvent($post['event-id'], $activity);
268 * Update an existing event
270 * @param int $event_id
271 * @param array $activity
273 private static function updateEvent(int $event_id, array $activity)
275 $event = DBA::selectFirst('event', [], ['id' => $event_id]);
277 $event['edited'] = DateTimeFormat::utc($activity['updated']);
278 $event['summary'] = HTML::toBBCode($activity['name']);
279 $event['desc'] = HTML::toBBCode($activity['content']);
280 if (!empty($activity['start-time'])) {
281 $event['start'] = DateTimeFormat::utc($activity['start-time']);
283 if (!empty($activity['end-time'])) {
284 $event['finish'] = DateTimeFormat::utc($activity['end-time']);
286 $event['nofinish'] = empty($event['finish']);
287 $event['location'] = $activity['location'];
289 Logger::info('Updating event', ['uri' => $activity['id'], 'id' => $event_id]);
290 Event::store($event);
294 * Prepares data for a message
296 * @param array $activity Activity array
297 * @param bool $fetch_parents
299 * @return array Internal item
301 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
302 * @throws \ImagickException
304 public static function createItem(array $activity, bool $fetch_parents): array
306 if (self::isProcessed($activity['id']) && !Post::exists(['uri' => $activity['id']])) {
307 Logger::info('Id is already processed', ['id' => $activity['id']]);
311 self::addActivityId($activity['id']);
314 $item['verb'] = Activity::POST;
315 $item['thr-parent'] = $activity['reply-to-id'];
317 if ($activity['reply-to-id'] == $activity['id']) {
318 $item['gravity'] = GRAVITY_PARENT;
319 $item['object-type'] = Activity\ObjectType::NOTE;
321 $item['gravity'] = GRAVITY_COMMENT;
322 $item['object-type'] = Activity\ObjectType::COMMENT;
325 if (!empty($activity['conversation'])) {
326 $item['conversation'] = $activity['conversation'];
327 } elseif (!empty($activity['context'])) {
328 $item['conversation'] = $activity['context'];
331 if (!empty($item['conversation'])) {
332 $conversation = Post::selectFirstThread(['uri'], ['conversation' => $item['conversation']]);
333 if (!empty($conversation)) {
334 Logger::debug('Got conversation', ['conversation' => $item['conversation'], 'parent' => $conversation]);
335 $item['parent-uri'] = $conversation['uri'];
341 Logger::debug('Create Item', ['id' => $activity['id'], 'conversation' => $item['conversation'] ?? '']);
342 if (empty($activity['author']) && empty($activity['actor'])) {
343 Logger::notice('Missing author and actor. We quit here.', ['activity' => $activity]);
344 Queue::remove($activity);
348 if (!in_array(0, $activity['receiver']) && !DI::config()->get('system', 'fetch_parents')) {
349 $fetch_parents = false;
352 if ($fetch_parents && empty($activity['directmessage']) && ($activity['id'] != $activity['reply-to-id']) && !Post::exists(['uri' => $activity['reply-to-id']])) {
353 $result = self::fetchParent($activity);
354 if (!empty($result)) {
355 if (($item['thr-parent'] != $result) && Post::exists(['uri' => $result])) {
356 $item['thr-parent'] = $result;
358 } elseif (empty($conversation)) {
363 $item['diaspora_signed_text'] = $activity['diaspora:comment'] ?? '';
365 if (empty($conversation) && empty($activity['directmessage']) && ($item['gravity'] != GRAVITY_PARENT) && !Post::exists(['uri' => $item['thr-parent']])) {
366 Logger::info('Parent not found, message will be discarded.', ['thr-parent' => $item['thr-parent']]);
367 if (!$fetch_parents) {
368 Queue::remove($activity);
373 $item['network'] = Protocol::ACTIVITYPUB;
374 $item['author-link'] = $activity['author'];
375 $item['author-id'] = Contact::getIdForURL($activity['author']);
376 $item['owner-link'] = $activity['actor'];
377 $item['owner-id'] = Contact::getIdForURL($activity['actor']);
379 if (in_array(0, $activity['receiver']) && !empty($activity['unlisted'])) {
380 $item['private'] = Item::UNLISTED;
381 } elseif (in_array(0, $activity['receiver'])) {
382 $item['private'] = Item::PUBLIC;
384 $item['private'] = Item::PRIVATE;
387 if (!empty($activity['raw'])) {
388 $item['source'] = $activity['raw'];
391 $item['protocol'] = Conversation::PARCEL_ACTIVITYPUB;
393 if (isset($activity['push'])) {
394 $item['direction'] = $activity['push'] ? Conversation::PUSH : Conversation::PULL;
397 if (!empty($activity['from-relay'])) {
398 $item['direction'] = Conversation::RELAY;
401 if ($activity['object_type'] == 'as:Article') {
402 $item['post-type'] = Item::PT_ARTICLE;
403 } elseif ($activity['object_type'] == 'as:Audio') {
404 $item['post-type'] = Item::PT_AUDIO;
405 } elseif ($activity['object_type'] == 'as:Document') {
406 $item['post-type'] = Item::PT_DOCUMENT;
407 } elseif ($activity['object_type'] == 'as:Event') {
408 $item['post-type'] = Item::PT_EVENT;
409 } elseif ($activity['object_type'] == 'as:Image') {
410 $item['post-type'] = Item::PT_IMAGE;
411 } elseif ($activity['object_type'] == 'as:Page') {
412 $item['post-type'] = Item::PT_PAGE;
413 } elseif ($activity['object_type'] == 'as:Question') {
414 $item['post-type'] = Item::PT_POLL;
415 } elseif ($activity['object_type'] == 'as:Video') {
416 $item['post-type'] = Item::PT_VIDEO;
418 $item['post-type'] = Item::PT_NOTE;
421 $item['isForum'] = false;
423 if (!empty($activity['thread-completion'])) {
424 if ($activity['thread-completion'] != $item['owner-id']) {
425 $actor = Contact::getById($activity['thread-completion'], ['url']);
426 $item['causer-link'] = $actor['url'];
427 $item['causer-id'] = $activity['thread-completion'];
428 Logger::info('Use inherited actor as causer.', ['id' => $item['owner-id'], 'activity' => $activity['thread-completion'], 'owner' => $item['owner-link'], 'actor' => $actor['url']]);
430 // Store the original actor in the "causer" fields to enable the check for ignored or blocked contacts
431 $item['causer-link'] = $item['owner-link'];
432 $item['causer-id'] = $item['owner-id'];
433 Logger::info('Use actor as causer.', ['id' => $item['owner-id'], 'actor' => $item['owner-link']]);
436 $item['owner-link'] = $item['author-link'];
437 $item['owner-id'] = $item['author-id'];
439 $actor = APContact::getByURL($item['owner-link'], false);
440 $item['isForum'] = ($actor['type'] == 'Group');
443 $item['uri'] = $activity['id'];
445 if (empty($activity['published']) || empty($activity['updated'])) {
446 DI::logger()->notice('published or updated keys are empty for activity', ['activity' => $activity, 'callstack' => System::callstack(10)]);
449 $item['created'] = DateTimeFormat::utc($activity['published'] ?? 'now');
450 $item['edited'] = DateTimeFormat::utc($activity['updated'] ?? 'now');
451 $guid = $activity['sc:identifier'] ?: self::getGUIDByURL($item['uri']);
452 $item['guid'] = $activity['diaspora:guid'] ?: $guid;
454 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
455 if (empty($item['uri-id'])) {
456 Logger::warning('Unable to get a uri-id for an item uri', ['uri' => $item['uri'], 'guid' => $item['guid']]);
460 $item = self::processContent($activity, $item);
462 Logger::info('Message was not processed');
463 Queue::remove($activity);
467 $item['plink'] = $activity['alternate-url'] ?? $item['uri'];
469 self::storeAttachments($activity, $item);
470 self::storeQuestion($activity, $item);
472 // We received the post via AP, so we set the protocol of the server to AP
473 $contact = Contact::getById($item['author-id'], ['gsid']);
474 if (!empty($contact['gsid'])) {
475 GServer::setProtocol($contact['gsid'], Post\DeliveryData::ACTIVITYPUB);
478 if ($item['author-id'] != $item['owner-id']) {
479 $contact = Contact::getById($item['owner-id'], ['gsid']);
480 if (!empty($contact['gsid'])) {
481 GServer::setProtocol($contact['gsid'], Post\DeliveryData::ACTIVITYPUB);
489 * Fetch and process parent posts for the given activity
491 * @param array $activity
495 private static function fetchParent(array $activity): string
497 $recursion_depth = $activity['recursion-depth'] ?? 0;
499 if ($recursion_depth < DI::config()->get('system', 'max_recursion_depth')) {
500 Logger::notice('Parent not found. Try to refetch it.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
501 $result = self::fetchMissingActivity($activity['reply-to-id'], $activity, '', Receiver::COMPLETION_AUTO);
502 if (empty($result) && self::isActivityGone($activity['reply-to-id'])) {
503 Logger::notice('The activity is gone, the queue entry will be deleted', ['parent' => $activity['reply-to-id']]);
504 if (!empty($activity['entry-id'])) {
505 Queue::deleteById($activity['entry-id']);
508 } elseif (!empty($result)) {
509 $exists = Post::exists(['uri' => [$result, $activity['reply-to-id']]]);
511 Logger::notice('The activity has been fetched and created.', ['parent' => $result]);
513 } elseif (DI::config()->get('system', 'fetch_by_worker') || DI::config()->get('system', 'decoupled_receiver')) {
514 Logger::notice('The activity has been fetched and will hopefully be created later.', ['parent' => $result]);
516 Logger::notice('The activity exists but has not been created, the queue entry will be deleted.', ['parent' => $result]);
517 if (!empty($activity['entry-id'])) {
518 Queue::deleteById($activity['entry-id']);
523 if (empty($result) && !DI::config()->get('system', 'fetch_by_worker')) {
526 } elseif (self::isActivityGone($activity['reply-to-id'])) {
527 Logger::notice('The activity is gone. We will not spawn a worker. The queue entry will be deleted', ['parent' => $activity['reply-to-id']]);
528 if (!empty($activity['entry-id'])) {
529 Queue::deleteById($activity['entry-id']);
533 Logger::notice('Recursion level is too high.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
536 if (Queue::hasWorker($activity['worker-id'] ?? 0)) {
537 Logger::notice('There is already a worker task to fetch the post.', ['id' => $activity['id'], 'parent' => $activity['reply-to-id']]);
541 if (!Fetch::hasWorker($activity['reply-to-id'])) {
542 Logger::notice('Fetching is done by worker.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
543 Fetch::add($activity['reply-to-id']);
544 $activity['recursion-depth'] = 0;
545 $wid = Worker::add(PRIORITY_HIGH, 'FetchMissingActivity', $activity['reply-to-id'], $activity, '', Receiver::COMPLETION_AUTO);
546 Fetch::setWorkerId($activity['reply-to-id'], $wid);
548 Logger::debug('Activity will already be fetched via a worker.', ['url' => $activity['reply-to-id']]);
555 * Check if a given activity is no longer available
561 public static function isActivityGone(string $url): bool
563 $curlResult = HTTPSignature::fetchRaw($url, 0);
565 if (Network::isUrlBlocked($url)) {
569 // @todo To ensure that the remote system is working correctly, we can check if the "Content-Type" contains JSON
570 if (in_array($curlResult->getReturnCode(), [401, 404])) {
574 if ($curlResult->isSuccess()) {
575 $object = json_decode($curlResult->getBody(), true);
576 if (!empty($object)) {
577 $activity = JsonLD::compact($object);
578 if (JsonLD::fetchElement($activity, '@type') == 'as:Tombstone') {
582 } elseif ($curlResult->getReturnCode() == 0) {
583 $host = parse_url($url, PHP_URL_HOST);
584 if (!(filter_var($host, FILTER_VALIDATE_IP) || @dns_get_record($host . '.', DNS_A + DNS_AAAA))) {
594 * @param array $activity
595 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
596 * @throws \ImagickException
598 public static function deleteItem(array $activity)
600 $owner = Contact::getIdForURL($activity['actor']);
602 Logger::info('Deleting item', ['object' => $activity['object_id'], 'owner' => $owner]);
603 Item::markForDeletion(['uri' => $activity['object_id'], 'owner-id' => $owner]);
604 Queue::remove($activity);
608 * Prepare the item array for an activity
610 * @param array $activity Activity array
611 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
612 * @throws \ImagickException
614 public static function addTag(array $activity)
616 if (empty($activity['object_content']) || empty($activity['object_id'])) {
620 foreach ($activity['receiver'] as $receiver) {
621 $item = Post::selectFirst(['id', 'uri-id', 'origin', 'author-link'], ['uri' => $activity['target_id'], 'uid' => $receiver]);
622 if (!DBA::isResult($item)) {
623 // We don't fetch missing content for this purpose
627 if (($item['author-link'] != $activity['actor']) && !$item['origin']) {
628 Logger::info('Not origin, not from the author, skipping update', ['id' => $item['id'], 'author' => $item['author-link'], 'actor' => $activity['actor']]);
632 Tag::store($item['uri-id'], Tag::HASHTAG, $activity['object_content'], $activity['object_id']);
633 Logger::info('Tagged item', ['id' => $item['id'], 'tag' => $activity['object_content'], 'uri' => $activity['target_id'], 'actor' => $activity['actor']]);
638 * Prepare the item array for an activity
640 * @param array $activity Activity array
641 * @param string $verb Activity verb
642 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
643 * @throws \ImagickException
645 public static function createActivity(array $activity, string $verb)
647 $activity['reply-to-id'] = $activity['object_id'];
648 $item = self::createItem($activity, false);
653 $item['verb'] = $verb;
654 $item['thr-parent'] = $activity['object_id'];
655 $item['gravity'] = GRAVITY_ACTIVITY;
656 unset($item['post-type']);
657 $item['object-type'] = Activity\ObjectType::NOTE;
659 if (!empty($activity['content'])) {
660 $item['body'] = HTML::toBBCode($activity['content']);
663 $item['diaspora_signed_text'] = $activity['diaspora:like'] ?? '';
665 self::postItem($activity, $item);
669 * Fetch the Uri-Id of a post for the "featured" collection
671 * @param array $activity
674 private static function getUriIdForFeaturedCollection(array $activity)
676 $actor = APContact::getByURL($activity['actor']);
681 // Refetch the account when the "featured" collection is missing.
682 // This can be removed in a future version (end of 2022 should be good).
683 if (empty($actor['featured'])) {
684 $actor = APContact::getByURL($activity['actor'], true);
690 $parent = Post::selectFirst(['uri-id'], ['uri' => $activity['object_id']]);
691 if (empty($parent['uri-id'])) {
692 if (self::fetchMissingActivity($activity['object_id'], $activity, '', Receiver::COMPLETION_AUTO)) {
693 $parent = Post::selectFirst(['uri-id'], ['uri' => $activity['object_id']]);
697 if (!empty($parent['uri-id'])) {
698 return $parent['uri-id'];
705 * Add a post to the "Featured" collection
707 * @param array $activity
709 public static function addToFeaturedCollection(array $activity)
711 $uriid = self::getUriIdForFeaturedCollection($activity);
716 Logger::debug('Add post to featured collection', ['uri-id' => $uriid]);
718 Post\Collection::add($uriid, Post\Collection::FEATURED);
719 Queue::remove($activity);
723 * Remove a post to the "Featured" collection
725 * @param array $activity
727 public static function removeFromFeaturedCollection(array $activity)
729 $uriid = self::getUriIdForFeaturedCollection($activity);
734 Logger::debug('Remove post from featured collection', ['uri-id' => $uriid]);
736 Post\Collection::remove($uriid, Post\Collection::FEATURED);
737 Queue::remove($activity);
743 * @param array $activity Activity array
746 * @return int event id
749 public static function createEvent(array $activity, array $item): int
751 $event['summary'] = HTML::toBBCode($activity['name'] ?: $activity['summary']);
752 $event['desc'] = HTML::toBBCode($activity['content']);
753 if (!empty($activity['start-time'])) {
754 $event['start'] = DateTimeFormat::utc($activity['start-time']);
756 if (!empty($activity['end-time'])) {
757 $event['finish'] = DateTimeFormat::utc($activity['end-time']);
759 $event['nofinish'] = empty($event['finish']);
760 $event['location'] = $activity['location'];
761 $event['cid'] = $item['contact-id'];
762 $event['uid'] = $item['uid'];
763 $event['uri'] = $item['uri'];
764 $event['edited'] = $item['edited'];
765 $event['private'] = $item['private'];
766 $event['guid'] = $item['guid'];
767 $event['plink'] = $item['plink'];
768 $event['network'] = $item['network'];
769 $event['protocol'] = $item['protocol'];
770 $event['direction'] = $item['direction'];
771 $event['source'] = $item['source'];
773 $ev = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
774 if (DBA::isResult($ev)) {
775 $event['id'] = $ev['id'];
778 $event_id = Event::store($event);
780 Logger::info('Event was stored', ['id' => $event_id]);
786 * Process the content
788 * @param array $activity Activity array
790 * @return array|bool Returns the item array or false if there was an unexpected occurrence
793 private static function processContent(array $activity, array $item)
795 if (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/markdown')) {
796 $item['title'] = strip_tags($activity['name']);
797 $content = Markdown::toBBCode($activity['content']);
798 } elseif (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/bbcode')) {
799 $item['title'] = $activity['name'];
800 $content = $activity['content'];
802 // By default assume "text/html"
803 $item['title'] = HTML::toBBCode($activity['name'] ?? '');
804 $content = HTML::toBBCode($activity['content'] ?? '');
807 $item['title'] = trim(BBCode::toPlaintext($item['title']));
809 if (!empty($activity['languages'])) {
810 $item['language'] = self::processLanguages($activity['languages']);
813 if (!empty($activity['emojis'])) {
814 $content = self::replaceEmojis($item['uri-id'], $content, $activity['emojis']);
817 $content = self::addMentionLinks($content, $activity['tags']);
819 if (!empty($activity['source'])) {
820 $item['body'] = $activity['source'];
821 $item['raw-body'] = $content;
822 $item['body'] = Item::improveSharedDataInBody($item);
824 $parent_uri = $item['parent-uri'] ?? $item['thr-parent'];
825 if (empty($activity['directmessage']) && ($parent_uri != $item['uri']) && ($item['gravity'] == GRAVITY_COMMENT)) {
826 $parent = Post::selectFirst(['id', 'uri-id', 'private', 'author-link', 'alias'], ['uri' => $parent_uri]);
827 if (!DBA::isResult($parent)) {
828 Logger::warning('Unknown parent item.', ['uri' => $parent_uri]);
831 if (!empty($activity['type']) && in_array($activity['type'], Receiver::CONTENT_TYPES) && ($item['private'] == Item::PRIVATE) && ($parent['private'] != Item::PRIVATE)) {
832 Logger::warning('Item is private but the parent is not. Dropping.', ['item-uri' => $item['uri'], 'thr-parent' => $item['thr-parent']]);
836 $content = self::removeImplicitMentionsFromBody($content, $parent);
838 $item['content-warning'] = HTML::toBBCode($activity['summary'] ?? '');
839 $item['raw-body'] = $item['body'] = $content;
842 self::storeFromBody($item);
843 self::storeTags($item['uri-id'], $activity['tags']);
845 self::storeReceivers($item['uri-id'], $activity['receiver_urls'] ?? []);
847 $item['location'] = $activity['location'];
849 if (!empty($activity['latitude']) && !empty($activity['longitude'])) {
850 $item['coord'] = $activity['latitude'] . ' ' . $activity['longitude'];
853 $item['app'] = $activity['generator'];
859 * Store hashtags and mentions
863 private static function storeFromBody(array $item)
865 // Make sure to delete all existing tags (can happen when called via the update functionality)
866 DBA::delete('post-tag', ['uri-id' => $item['uri-id']]);
868 Tag::storeFromBody($item['uri-id'], $item['body'], '@!');
872 * Generate a GUID out of an URL of an ActivityPub post.
874 * @param string $url message URL
875 * @return string with GUID
877 private static function getGUIDByURL(string $url): string
879 $parsed = parse_url($url);
881 $host_hash = hash('crc32', $parsed['host']);
883 unset($parsed["scheme"]);
884 unset($parsed["host"]);
886 $path = implode("/", $parsed);
888 return $host_hash . '-'. hash('fnv164', $path) . '-'. hash('joaat', $path);
892 * Checks if an incoming message is wanted
894 * @param array $activity
896 * @return boolean Is the message wanted?
898 private static function isSolicitedMessage(array $activity, array $item): bool
900 // The checks are split to improve the support when searching why a message was accepted.
901 if (count($activity['receiver']) != 1) {
902 // The message has more than one receiver, so it is wanted.
903 Logger::debug('Message has got several receivers - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
907 if ($item['private'] == Item::PRIVATE) {
908 // We only look at public posts here. Private posts are expected to be intentionally posted to the single receiver.
909 Logger::debug('Message is private - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
913 if (!empty($activity['from-relay'])) {
914 // We check relay posts at another place. When it arrived here, the message is already checked.
915 Logger::debug('Message is a relay post that is already checked - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
919 if (in_array($activity['completion-mode'] ?? Receiver::COMPLETION_NONE, [Receiver::COMPLETION_MANUAL, Receiver::COMPLETION_ANNOUCE])) {
920 // Manual completions and completions caused by reshares are allowed without any further checks.
921 Logger::debug('Message is in completion mode - accepted', ['mode' => $activity['completion-mode'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
925 if ($item['gravity'] != GRAVITY_PARENT) {
926 // We cannot reliably check at this point if a comment or activity belongs to an accepted post or needs to be fetched
927 // This can possibly be improved in the future.
928 Logger::debug('Message is no parent - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
932 $tags = array_column(Tag::getByURIId($item['uri-id'], [Tag::HASHTAG]), 'name');
933 if (Relay::isSolicitedPost($tags, $item['body'], $item['author-id'], $item['uri'], Protocol::ACTIVITYPUB)) {
934 Logger::debug('Post is accepted because of the relay settings', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
942 * Creates an item post
944 * @param array $activity Activity data
945 * @param array $item item array
946 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
947 * @throws \ImagickException
949 public static function postItem(array $activity, array $item)
957 ksort($activity['receiver']);
959 if (!self::isSolicitedMessage($activity, $item)) {
960 DBA::delete('item-uri', ['id' => $item['uri-id']]);
961 if (!empty($activity['entry-id'])) {
962 Queue::deleteById($activity['entry-id']);
967 foreach ($activity['receiver'] as $receiver) {
968 if ($receiver == -1) {
972 $item['uid'] = $receiver;
974 $type = $activity['reception_type'][$receiver] ?? Receiver::TARGET_UNKNOWN;
976 case Receiver::TARGET_TO:
977 $item['post-reason'] = Item::PR_TO;
979 case Receiver::TARGET_CC:
980 $item['post-reason'] = Item::PR_CC;
982 case Receiver::TARGET_BTO:
983 $item['post-reason'] = Item::PR_BTO;
985 case Receiver::TARGET_BCC:
986 $item['post-reason'] = Item::PR_BCC;
988 case Receiver::TARGET_FOLLOWER:
989 $item['post-reason'] = Item::PR_FOLLOWER;
991 case Receiver::TARGET_ANSWER:
992 $item['post-reason'] = Item::PR_COMMENT;
994 case Receiver::TARGET_GLOBAL:
995 $item['post-reason'] = Item::PR_GLOBAL;
998 $item['post-reason'] = Item::PR_NONE;
1001 $item['post-reason'] = Item::getPostReason($item);
1003 if (in_array($item['post-reason'], [Item::PR_GLOBAL, Item::PR_NONE])) {
1004 if (!empty($activity['from-relay'])) {
1005 $item['post-reason'] = Item::PR_RELAY;
1006 } elseif (!empty($activity['thread-completion'])) {
1007 $item['post-reason'] = Item::PR_FETCHED;
1008 } elseif (!empty($activity['push'])) {
1009 $item['post-reason'] = Item::PR_PUSHED;
1013 if ($item['isForum'] ?? false) {
1014 $item['contact-id'] = Contact::getIdForURL($activity['actor'], $receiver);
1016 $item['contact-id'] = Contact::getIdForURL($activity['author'], $receiver);
1019 if (($receiver != 0) && empty($item['contact-id'])) {
1020 $item['contact-id'] = Contact::getIdForURL($activity['author']);
1023 if (!empty($activity['directmessage'])) {
1024 self::postMail($activity, $item);
1028 if (($receiver != 0) && ($item['gravity'] == GRAVITY_PARENT) && !in_array($item['post-reason'], [Item::PR_FOLLOWER, Item::PR_TAG, item::PR_TO, Item::PR_CC])) {
1029 if (!($item['isForum'] ?? false)) {
1030 if ($item['post-reason'] == Item::PR_BCC) {
1031 Logger::info('Top level post via BCC from a non sharer, ignoring', ['uid' => $receiver, 'contact' => $item['contact-id'], 'url' => $item['uri']]);
1035 if ((DI::pConfig()->get($receiver, 'system', 'accept_only_sharer') != Item::COMPLETION_LIKE)
1036 && in_array($activity['thread-children-type'] ?? '', Receiver::ACTIVITY_TYPES)) {
1037 Logger::info('Top level post from thread completion from a non sharer had been initiated via an activity, ignoring',
1038 ['type' => $activity['thread-children-type'], 'user' => $item['uid'], 'causer' => $item['causer-link'], 'author' => $activity['author'], 'url' => $item['uri']]);
1044 $user = User::getById($receiver, ['account-type']);
1045 if (!empty($user['account-type'])) {
1046 $is_forum = ($user['account-type'] == User::ACCOUNT_TYPE_COMMUNITY);
1049 if ((DI::pConfig()->get($receiver, 'system', 'accept_only_sharer') == Item::COMPLETION_NONE)
1050 && ((!$is_forum && !($item['isForum'] ?? false) && ($activity['type'] != 'as:Announce'))
1051 || !Contact::isSharingByURL($activity['actor'], $receiver))) {
1052 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']]);
1056 Logger::info('Accepting post', ['uid' => $receiver, 'url' => $item['uri']]);
1059 if (($item['gravity'] != GRAVITY_ACTIVITY) && ($activity['object_type'] == 'as:Event')) {
1060 $event_id = self::createEvent($activity, $item);
1062 $item = Event::getItemArrayForImportedId($event_id, $item);
1065 $item_id = Item::insert($item);
1067 Logger::info('Item insertion successful', ['user' => $item['uid'], 'item_id' => $item_id]);
1070 Logger::notice('Item insertion aborted', ['uri' => $item['uri'], 'uid' => $item['uid']]);
1071 if (($item['uid'] == 0) && (count($activity['receiver']) > 1)) {
1072 Logger::info('Public item was aborted. We skip for all users.', ['uri' => $item['uri']]);
1077 if ($item['uid'] == 0) {
1082 Queue::remove($activity);
1084 if ($success && Queue::hasChildren($item['uri']) && Post::exists(['uri' => $item['uri']])) {
1085 Queue::processReplyByUri($item['uri']);
1088 // Store send a follow request for every reshare - but only when the item had been stored
1089 if ($stored && ($item['private'] != Item::PRIVATE) && ($item['gravity'] == GRAVITY_PARENT) && !empty($item['author-link']) && ($item['author-link'] != $item['owner-link'])) {
1090 $author = APContact::getByURL($item['owner-link'], false);
1091 // We send automatic follow requests for reshared messages. (We don't need though for forum posts)
1092 if ($author['type'] != 'Group') {
1093 Logger::info('Send follow request', ['uri' => $item['uri'], 'stored' => $stored, 'to' => $item['author-link']]);
1094 ActivityPub\Transmitter::sendFollowObject($item['uri'], $item['author-link']);
1100 * Store tags and mentions into the tag table
1102 * @param integer $uriid
1103 * @param array $tags
1105 private static function storeTags(int $uriid, array $tags = null)
1107 foreach ($tags as $tag) {
1108 if (empty($tag['name']) || empty($tag['type']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
1112 $hash = substr($tag['name'], 0, 1);
1114 if ($tag['type'] == 'Mention') {
1115 if (in_array($hash, [Tag::TAG_CHARACTER[Tag::MENTION],
1116 Tag::TAG_CHARACTER[Tag::EXCLUSIVE_MENTION],
1117 Tag::TAG_CHARACTER[Tag::IMPLICIT_MENTION]])) {
1118 $tag['name'] = substr($tag['name'], 1);
1120 $type = Tag::IMPLICIT_MENTION;
1122 if (!empty($tag['href'])) {
1123 $apcontact = APContact::getByURL($tag['href']);
1124 if (!empty($apcontact['name']) || !empty($apcontact['nick'])) {
1125 $tag['name'] = $apcontact['name'] ?: $apcontact['nick'];
1128 } elseif ($tag['type'] == 'Hashtag') {
1129 if ($hash == Tag::TAG_CHARACTER[Tag::HASHTAG]) {
1130 $tag['name'] = substr($tag['name'], 1);
1132 $type = Tag::HASHTAG;
1135 if (empty($tag['name'])) {
1139 Tag::store($uriid, $type, $tag['name'], $tag['href']);
1143 public static function storeReceivers(int $uriid, array $receivers)
1145 foreach (['as:to' => Tag::TO, 'as:cc' => Tag::CC, 'as:bto' => Tag::BTO, 'as:bcc' => Tag::BCC] as $element => $type) {
1146 if (!empty($receivers[$element])) {
1147 foreach ($receivers[$element] as $receiver) {
1148 if ($receiver == ActivityPub::PUBLIC_COLLECTION) {
1149 $name = Receiver::PUBLIC_COLLECTION;
1151 $name = trim(parse_url($receiver, PHP_URL_PATH), '/');
1154 $target = Tag::getTargetType($receiver);
1155 Logger::debug('Got target type', ['type' => $target, 'url' => $receiver]);
1156 Tag::store($uriid, $type, $name, $receiver, $target);
1163 * Creates an mail post
1165 * @param array $activity Activity data
1166 * @param array $item item array
1167 * @return int|bool New mail table row id or false on error
1168 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1170 private static function postMail(array $activity, array $item)
1172 if (($item['gravity'] != GRAVITY_PARENT) && !DBA::exists('mail', ['uri' => $item['thr-parent'], 'uid' => $item['uid']])) {
1173 Logger::info('Parent not found, mail will be discarded.', ['uid' => $item['uid'], 'uri' => $item['thr-parent']]);
1177 Logger::info('Direct Message', $item);
1180 $msg['uid'] = $item['uid'];
1182 $msg['contact-id'] = $item['contact-id'];
1184 $contact = Contact::getById($item['contact-id'], ['name', 'url', 'photo']);
1185 $msg['from-name'] = $contact['name'];
1186 $msg['from-url'] = $contact['url'];
1187 $msg['from-photo'] = $contact['photo'];
1189 $msg['uri'] = $item['uri'];
1190 $msg['created'] = $item['created'];
1192 $parent = DBA::selectFirst('mail', ['parent-uri', 'title'], ['uri' => $item['thr-parent']]);
1193 if (DBA::isResult($parent)) {
1194 $msg['parent-uri'] = $parent['parent-uri'];
1195 $msg['title'] = $parent['title'];
1197 $msg['parent-uri'] = $item['thr-parent'];
1199 if (!empty($item['title'])) {
1200 $msg['title'] = $item['title'];
1201 } elseif (!empty($item['content-warning'])) {
1202 $msg['title'] = $item['content-warning'];
1204 // Trying to generate a title out of the body
1205 $title = $item['body'];
1207 while (preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $title, $matches)) {
1208 $title = $matches[3];
1211 $title = trim(BBCode::toPlaintext($title));
1213 if (strlen($title) > 20) {
1214 $title = substr($title, 0, 20) . '...';
1217 $msg['title'] = $title;
1220 $msg['body'] = $item['body'];
1222 return Mail::insert($msg);
1226 * Fetch featured posts from a contact with the given url
1228 * @param string $url
1231 public static function fetchFeaturedPosts(string $url)
1233 Logger::info('Fetch featured posts', ['contact' => $url]);
1235 $apcontact = APContact::getByURL($url);
1236 if (empty($apcontact['featured'])) {
1237 Logger::info('Contact does not have a featured collection', ['contact' => $url]);
1241 $pcid = Contact::getIdForURL($url, 0, false);
1243 Logger::info('Contact not found', ['contact' => $url]);
1247 $posts = Post\Collection::selectToArrayForContact($pcid, Post\Collection::FEATURED);
1248 if (!empty($posts)) {
1249 $old_featured = array_column($posts, 'uri-id');
1254 $featured = ActivityPub::fetchItems($apcontact['featured']);
1255 if (empty($featured)) {
1256 Logger::info('Contact does not have featured posts', ['contact' => $url]);
1258 foreach ($old_featured as $uri_id) {
1259 Post\Collection::remove($uri_id, Post\Collection::FEATURED);
1260 Logger::debug('Removed no longer featured post', ['uri-id' => $uri_id, 'contact' => $url]);
1268 foreach ($featured as $post) {
1269 if (empty($post['id'])) {
1272 $id = Item::fetchByLink($post['id']);
1274 $item = Post::selectFirst(['uri-id', 'featured'], ['id' => $id]);
1275 if (!empty($item['uri-id'])) {
1276 if (!$item['featured']) {
1277 Post\Collection::add($item['uri-id'], Post\Collection::FEATURED);
1278 Logger::debug('Added featured post', ['uri-id' => $item['uri-id'], 'contact' => $url]);
1281 Logger::debug('Post already had been featured', ['uri-id' => $item['uri-id'], 'contact' => $url]);
1285 $index = array_search($item['uri-id'], $old_featured);
1286 if (!($index === false)) {
1287 unset($old_featured[$index]);
1293 foreach ($old_featured as $uri_id) {
1294 Post\Collection::remove($uri_id, Post\Collection::FEATURED);
1295 Logger::debug('Removed no longer featured post', ['uri-id' => $uri_id, 'contact' => $url]);
1298 Logger::info('Fetched featured posts', ['new' => $new, 'old' => $old, 'contact' => $url]);
1301 public static function fetchCachedActivity(string $url, int $uid): array
1303 $cachekey = self::CACHEKEY_FETCH_ACTIVITY . $uid . ':' . $url;
1304 $object = DI::cache()->get($cachekey);
1306 if (!is_null($object)) {
1307 if (!empty($object)) {
1308 Logger::debug('Fetch from cache', ['url' => $url, 'uid' => $uid]);
1310 Logger::debug('Fetch from negative cache', ['url' => $url, 'uid' => $uid]);
1315 $object = ActivityPub::fetchContent($url, $uid);
1316 if (empty($object)) {
1317 Logger::notice('Activity was not fetchable, aborting.', ['url' => $url, 'uid' => $uid]);
1318 // We perform negative caching.
1319 DI::cache()->set($cachekey, [], Duration::FIVE_MINUTES);
1323 if (empty($object['id'])) {
1324 Logger::notice('Activity has got not id, aborting. ', ['url' => $url, 'object' => $object]);
1327 DI::cache()->set($cachekey, $object, Duration::FIVE_MINUTES);
1329 Logger::debug('Activity was fetched successfully', ['url' => $url, 'uid' => $uid]);
1335 * Fetches missing posts
1337 * @param string $url message URL
1338 * @param array $child activity array with the child of this message
1339 * @param string $relay_actor Relay actor
1340 * @param int $completion Completion mode, see Receiver::COMPLETION_*
1341 * @return string fetched message URL
1342 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1343 * @throws \ImagickException
1345 public static function fetchMissingActivity(string $url, array $child = [], string $relay_actor = '', int $completion = Receiver::COMPLETION_MANUAL): string
1347 $object = self::fetchCachedActivity($url, 0);
1348 if (empty($object)) {
1354 if (!empty($object['attributedTo'])) {
1355 $attributed_to = $object['attributedTo'];
1356 if (is_array($attributed_to)) {
1357 $compacted = JsonLD::compact($object);
1358 $attributed_to = JsonLD::fetchElement($compacted, 'as:attributedTo', '@id');
1360 $signer[] = $attributed_to;
1363 if (!empty($object['actor'])) {
1364 $object_actor = $object['actor'];
1365 } elseif (!empty($attributed_to)) {
1366 $object_actor = $attributed_to;
1372 $signer[] = $object_actor;
1374 if (!empty($child['author'])) {
1375 $actor = $child['author'];
1378 $actor = $object_actor;
1381 if (!empty($object['published'])) {
1382 $published = $object['published'];
1383 } elseif (!empty($child['published'])) {
1384 $published = $child['published'];
1386 $published = DateTimeFormat::utcNow();
1390 $activity['@context'] = $object['@context'] ?? ActivityPub::CONTEXT;
1391 unset($object['@context']);
1392 $activity['id'] = $object['id'];
1393 $activity['to'] = $object['to'] ?? [];
1394 $activity['cc'] = $object['cc'] ?? [];
1395 $activity['actor'] = $actor;
1396 $activity['object'] = $object;
1397 $activity['published'] = $published;
1398 $activity['type'] = 'Create';
1400 $ldactivity = JsonLD::compact($activity);
1402 $ldactivity['recursion-depth'] = !empty($child['recursion-depth']) ? $child['recursion-depth'] + 1 : 0;
1404 if (!empty($relay_actor)) {
1405 $ldactivity['thread-completion'] = $ldactivity['from-relay'] = Contact::getIdForURL($relay_actor);
1406 $ldactivity['completion-mode'] = Receiver::COMPLETION_RELAY;
1407 } elseif (!empty($child['thread-completion'])) {
1408 $ldactivity['thread-completion'] = $child['thread-completion'];
1409 $ldactivity['completion-mode'] = $child['completion-mode'] ?? Receiver::COMPLETION_NONE;
1411 $ldactivity['thread-completion'] = Contact::getIdForURL($actor);
1412 $ldactivity['completion-mode'] = $completion;
1415 if (!empty($child['thread-children-type'])) {
1416 $ldactivity['thread-children-type'] = $child['thread-children-type'];
1417 } elseif (!empty($child['type'])) {
1418 $ldactivity['thread-children-type'] = $child['type'];
1420 $ldactivity['thread-children-type'] = 'as:Create';
1423 if (!empty($relay_actor) && !self::acceptIncomingMessage($ldactivity, $object['id'])) {
1427 if (($completion == Receiver::COMPLETION_RELAY) && Queue::exists($url, 'as:Create')) {
1428 Logger::notice('Activity has already been queued.', ['url' => $url, 'object' => $activity['id']]);
1429 } elseif (ActivityPub\Receiver::processActivity($ldactivity, json_encode($activity), 0, true, false, $signer, '', $completion)) {
1430 Logger::notice('Activity had been fetched and processed.', ['url' => $url, 'entry' => $child['entry-id'] ?? 0, 'completion' => $completion, 'object' => $activity['id']]);
1432 Logger::notice('Activity had been fetched and will be processed later.', ['url' => $url, 'entry' => $child['entry-id'] ?? 0, 'completion' => $completion, 'object' => $activity['id']]);
1435 return $activity['id'];
1439 * Test if incoming relay messages should be accepted
1441 * @param array $activity activity array
1442 * @param string $id object ID
1443 * @return boolean true if message is accepted
1445 private static function acceptIncomingMessage(array $activity, string $id): bool
1447 if (empty($activity['as:object'])) {
1448 Logger::info('No object field in activity - accepted', ['id' => $id]);
1452 $replyto = JsonLD::fetchElement($activity['as:object'], 'as:inReplyTo', '@id');
1453 $uriid = ItemURI::getIdByURI($replyto ?? '');
1454 if (Post::exists(['uri-id' => $uriid])) {
1455 Logger::info('Post is a reply to an existing post - accepted', ['id' => $id, 'uri-id' => $uriid, 'replyto' => $replyto]);
1459 $attributed_to = JsonLD::fetchElement($activity['as:object'], 'as:attributedTo', '@id');
1460 $authorid = Contact::getIdForURL($attributed_to);
1462 $body = HTML::toBBCode(JsonLD::fetchElement($activity['as:object'], 'as:content', '@value') ?? '');
1465 $tags = Receiver::processTags(JsonLD::fetchElementArray($activity['as:object'], 'as:tag') ?? []);
1466 if (!empty($tags)) {
1467 foreach ($tags as $tag) {
1468 if ($tag['type'] != 'Hashtag') {
1471 $messageTags[] = ltrim(mb_strtolower($tag['name']), '#');
1475 return Relay::isSolicitedPost($messageTags, $body, $authorid, $id, Protocol::ACTIVITYPUB);
1479 * perform a "follow" request
1481 * @param array $activity
1483 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1484 * @throws \ImagickException
1486 public static function followUser(array $activity)
1488 $uid = User::getIdForURL($activity['object_id']);
1490 Queue::remove($activity);
1494 $owner = User::getOwnerDataById($uid);
1495 if (empty($owner)) {
1499 $cid = Contact::getIdForURL($activity['actor'], $uid);
1501 self::switchContact($cid);
1502 Contact::update(['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
1506 'author-id' => Contact::getIdForURL($activity['actor']),
1507 'author-link' => $activity['actor'],
1510 // Ensure that the contact has got the right network type
1511 self::switchContact($item['author-id']);
1513 $result = Contact::addRelationship($owner, [], $item, false, $activity['content'] ?? '');
1514 if ($result === true) {
1515 ActivityPub\Transmitter::sendContactAccept($item['author-link'], $activity['id'], $owner['uid']);
1518 $cid = Contact::getIdForURL($activity['actor'], $uid);
1523 if ($result && DI::config()->get('system', 'transmit_pending_events') && ($owner['contact-type'] == Contact::TYPE_COMMUNITY)) {
1524 self::transmitPendingEvents($cid, $owner['uid']);
1527 if (empty($contact)) {
1528 Contact::update(['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
1530 Logger::notice('Follow user ' . $uid . ' from contact ' . $cid . ' with id ' . $activity['id']);
1531 Queue::remove($activity);
1535 * Transmit pending events to the new follower
1537 * @param integer $cid Contact id
1538 * @param integer $uid User id
1541 private static function transmitPendingEvents(int $cid, int $uid)
1543 $account = DBA::selectFirst('account-user-view', ['ap-inbox', 'ap-sharedinbox'], ['id' => $cid]);
1544 $inbox = $account['ap-sharedinbox'] ?: $account['ap-inbox'];
1546 $events = DBA::select('event', ['id'], ["`uid` = ? AND `start` > ? AND `type` != ?", $uid, DateTimeFormat::utcNow(), 'birthday']);
1547 while ($event = DBA::fetch($events)) {
1548 $post = Post::selectFirst(['id', 'uri-id', 'created'], ['event-id' => $event['id']]);
1552 if (DI::config()->get('system', 'bulk_delivery')) {
1553 Post\Delivery::add($post['uri-id'], $uid, $inbox, $post['created'], Delivery::POST, [$cid]);
1554 Worker::add(PRIORITY_HIGH, 'APDelivery', '', 0, $inbox, 0);
1556 Worker::add(PRIORITY_HIGH, 'APDelivery', Delivery::POST, $post['id'], $inbox, $uid, [$cid], $post['uri-id']);
1562 * Update the given profile
1564 * @param array $activity
1565 * @throws \Exception
1567 public static function updatePerson(array $activity)
1569 if (empty($activity['object_id'])) {
1573 Logger::info('Updating profile', ['object' => $activity['object_id']]);
1574 Contact::updateFromProbeByURL($activity['object_id']);
1575 Queue::remove($activity);
1579 * Delete the given profile
1581 * @param array $activity
1583 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1585 public static function deletePerson(array $activity)
1587 if (empty($activity['object_id']) || empty($activity['actor'])) {
1588 Logger::info('Empty object id or actor.');
1592 if ($activity['object_id'] != $activity['actor']) {
1593 Logger::info('Object id does not match actor.');
1597 $contacts = DBA::select('contact', ['id'], ['nurl' => Strings::normaliseLink($activity['object_id'])]);
1598 while ($contact = DBA::fetch($contacts)) {
1599 Contact::remove($contact['id']);
1601 DBA::close($contacts);
1603 Logger::info('Deleted contact', ['object' => $activity['object_id']]);
1604 Queue::remove($activity);
1608 * Blocks the user by the contact
1610 * @param array $activity
1612 * @throws \Exception
1614 public static function blockAccount(array $activity)
1616 $cid = Contact::getIdForURL($activity['actor']);
1621 $uid = User::getIdForURL($activity['object_id']);
1626 Contact\User::setIsBlocked($cid, $uid, true);
1628 Logger::info('Contact blocked user', ['contact' => $cid, 'user' => $uid]);
1629 Queue::remove($activity);
1633 * Unblocks the user by the contact
1635 * @param array $activity
1637 * @throws \Exception
1639 public static function unblockAccount(array $activity)
1641 $cid = Contact::getIdForURL($activity['actor']);
1646 $uid = User::getIdForURL($activity['object_object']);
1651 Contact\User::setIsBlocked($cid, $uid, false);
1653 Logger::info('Contact unblocked user', ['contact' => $cid, 'user' => $uid]);
1654 Queue::remove($activity);
1658 * Accept a follow request
1660 * @param array $activity
1661 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1662 * @throws \ImagickException
1664 public static function acceptFollowUser(array $activity)
1666 $uid = User::getIdForURL($activity['object_actor']);
1671 $cid = Contact::getIdForURL($activity['actor'], $uid);
1673 Logger::info('No contact found', ['actor' => $activity['actor']]);
1677 self::switchContact($cid);
1679 $fields = ['pending' => false];
1681 $contact = DBA::selectFirst('contact', ['rel'], ['id' => $cid]);
1682 if ($contact['rel'] == Contact::FOLLOWER) {
1683 $fields['rel'] = Contact::FRIEND;
1686 $condition = ['id' => $cid];
1687 Contact::update($fields, $condition);
1688 Logger::info('Accept contact request', ['contact' => $cid, 'user' => $uid]);
1689 Queue::remove($activity);
1693 * Reject a follow request
1695 * @param array $activity
1696 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1697 * @throws \ImagickException
1699 public static function rejectFollowUser(array $activity)
1701 $uid = User::getIdForURL($activity['object_actor']);
1706 $cid = Contact::getIdForURL($activity['actor'], $uid);
1708 Logger::info('No contact found', ['actor' => $activity['actor']]);
1712 self::switchContact($cid);
1714 $contact = Contact::getById($cid, ['rel']);
1715 if ($contact['rel'] == Contact::SHARING) {
1716 Contact::remove($cid);
1717 Logger::info('Rejected contact request - contact removed', ['contact' => $cid, 'user' => $uid]);
1718 } elseif ($contact['rel'] == Contact::FRIEND) {
1719 Contact::update(['rel' => Contact::FOLLOWER], ['id' => $cid]);
1721 Logger::info('Rejected contact request', ['contact' => $cid, 'user' => $uid]);
1723 Queue::remove($activity);
1727 * Undo activity like "like" or "dislike"
1729 * @param array $activity
1730 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1731 * @throws \ImagickException
1733 public static function undoActivity(array $activity)
1735 if (empty($activity['object_id'])) {
1739 if (empty($activity['object_actor'])) {
1743 $author_id = Contact::getIdForURL($activity['object_actor']);
1744 if (empty($author_id)) {
1748 Item::markForDeletion(['uri' => $activity['object_id'], 'author-id' => $author_id, 'gravity' => GRAVITY_ACTIVITY]);
1749 Queue::remove($activity);
1753 * Activity to remove a follower
1755 * @param array $activity
1756 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1757 * @throws \ImagickException
1759 public static function undoFollowUser(array $activity)
1761 $uid = User::getIdForURL($activity['object_object']);
1766 $owner = User::getOwnerDataById($uid);
1767 if (empty($owner)) {
1771 $cid = Contact::getIdForURL($activity['actor'], $uid);
1773 Logger::info('No contact found', ['actor' => $activity['actor']]);
1777 self::switchContact($cid);
1779 $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
1780 if (!DBA::isResult($contact)) {
1784 Contact::removeFollower($contact);
1785 Logger::info('Undo following request', ['contact' => $cid, 'user' => $uid]);
1786 Queue::remove($activity);
1790 * Switches a contact to AP if needed
1792 * @param integer $cid Contact ID
1794 * @throws \Exception
1796 private static function switchContact(int $cid)
1798 $contact = DBA::selectFirst('contact', ['network', 'url'], ['id' => $cid]);
1799 if (!DBA::isResult($contact) || in_array($contact['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN]) || Contact::isLocal($contact['url'])) {
1803 Logger::info('Change existing contact', ['cid' => $cid, 'previous' => $contact['network']]);
1804 Contact::updateFromProbe($cid);
1808 * Collects implicit mentions like:
1809 * - the author of the parent item
1810 * - all the mentioned conversants in the parent item
1812 * @param array $parent Item array with at least ['id', 'author-link', 'alias']
1814 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1816 private static function getImplicitMentionList(array $parent): array
1818 $parent_terms = Tag::getByURIId($parent['uri-id'], [Tag::MENTION, Tag::IMPLICIT_MENTION, Tag::EXCLUSIVE_MENTION]);
1820 $parent_author = Contact::getByURL($parent['author-link'], false, ['url', 'nurl', 'alias']);
1822 $implicit_mentions = [];
1823 if (empty($parent_author['url'])) {
1824 Logger::notice('Author public contact unknown.', ['author-link' => $parent['author-link'], 'parent-id' => $parent['id']]);
1826 $implicit_mentions[] = $parent_author['url'];
1827 $implicit_mentions[] = $parent_author['nurl'];
1828 $implicit_mentions[] = $parent_author['alias'];
1831 if (!empty($parent['alias'])) {
1832 $implicit_mentions[] = $parent['alias'];
1835 foreach ($parent_terms as $term) {
1836 $contact = Contact::getByURL($term['url'], false, ['url', 'nurl', 'alias']);
1837 if (!empty($contact['url'])) {
1838 $implicit_mentions[] = $contact['url'];
1839 $implicit_mentions[] = $contact['nurl'];
1840 $implicit_mentions[] = $contact['alias'];
1844 return $implicit_mentions;
1848 * Strips from the body prepended implicit mentions
1850 * @param string $body
1851 * @param array $parent
1854 private static function removeImplicitMentionsFromBody(string $body, array $parent): string
1856 if (DI::config()->get('system', 'disable_implicit_mentions')) {
1860 $potential_mentions = self::getImplicitMentionList($parent);
1862 $kept_mentions = [];
1864 // Extract one prepended mention at a time from the body
1865 while(preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $body, $matches)) {
1866 if (!in_array($matches[2], $potential_mentions)) {
1867 $kept_mentions[] = $matches[1];
1870 $body = $matches[3];
1873 // Re-appending the kept mentions to the body after extraction
1874 $kept_mentions[] = $body;
1876 return implode('', $kept_mentions);
1880 * Adds links to string mentions
1882 * @param string $body
1883 * @param array $tags
1886 protected static function addMentionLinks(string $body, array $tags): string
1888 // This prevents links to be added again to Pleroma-style mention links
1889 $body = self::normalizeMentionLinks($body);
1891 $body = BBCode::performWithEscapedTags($body, ['url'], function ($body) use ($tags) {
1892 foreach ($tags as $tag) {
1893 if (empty($tag['name']) || empty($tag['type']) || empty($tag['href']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
1897 $hash = substr($tag['name'], 0, 1);
1898 $name = substr($tag['name'], 1);
1899 if (!in_array($hash, Tag::TAG_CHARACTER)) {
1901 $name = $tag['name'];
1904 $body = str_replace($tag['name'], $hash . '[url=' . $tag['href'] . ']' . $name . '[/url]', $body);