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\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\Delivery;
48 use Friendica\Protocol\Relay;
49 use Friendica\Util\DateTimeFormat;
50 use Friendica\Util\HTTPSignature;
51 use Friendica\Util\JsonLD;
52 use Friendica\Util\Network;
53 use Friendica\Util\Strings;
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('fetched-activity', ["`received` < ?", DateTimeFormat::utc('now - 5 minutes')]);
73 DBA::insert('fetched-activity', ['object-id' => $id, 'received' => DateTimeFormat::utcNow()]);
77 * Checks if the given object id has just been fetched
83 private static function isFetched(string $id): bool
85 return DBA::exists('fetched-activity', ['object-id' => $id]);
89 * Extracts the tag character (#, @, !) from mention links
94 public static function normalizeMentionLinks(string $body): string
96 $body = preg_replace('%\[url=([^\[\]]*)]([#@!])(.*?)\[/url]%ism', '$2[url=$1]$3[/url]', $body);
97 $body = preg_replace('%([#@!])\[zrl=([^\[\]]*)](.*?)\[/zrl]%ism', '$1[url=$2]$3[/url]', $body);
102 * Convert the language array into a language JSON
104 * @param array $languages
105 * @return string language JSON
107 private static function processLanguages(array $languages): string
109 $codes = array_keys($languages);
111 foreach ($codes as $code) {
119 return json_encode($lang);
122 * Replaces emojis in the body
125 * @param string $body
126 * @param array $emojis
128 * @return string with replaced emojis
130 private static function replaceEmojis(int $uri_id, string $body, array $emojis): string
134 array_column($emojis, 'name'),
135 array_map(function ($emoji) {
136 return '[emoji=' . $emoji['href'] . ']' . $emoji['name'] . '[/emoji]';
141 // We store the emoji here to be able to avoid storing it in the media
142 foreach ($emojis as $emoji) {
143 Post\Link::getByLink($uri_id, $emoji['href']);
149 * Store attached media files in the post-media table
152 * @param array $attachment
155 private static function storeAttachmentAsMedia(int $uriid, array $attachment)
157 if (empty($attachment['url'])) {
161 $data = ['uri-id' => $uriid];
162 $data['type'] = Post\Media::UNKNOWN;
163 $data['url'] = $attachment['url'];
164 $data['mimetype'] = $attachment['mediaType'] ?? null;
165 $data['height'] = $attachment['height'] ?? null;
166 $data['width'] = $attachment['width'] ?? null;
167 $data['size'] = $attachment['size'] ?? null;
168 $data['preview'] = $attachment['image'] ?? null;
169 $data['description'] = $attachment['name'] ?? null;
171 Post\Media::insert($data);
175 * Store attachment data
177 * @param array $activity
180 private static function storeAttachments(array $activity, array $item)
182 if (empty($activity['attachments'])) {
186 foreach ($activity['attachments'] as $attach) {
187 self::storeAttachmentAsMedia($item['uri-id'], $attach);
192 * Store question data
194 * @param array $activity
197 private static function storeQuestion(array $activity, array $item)
199 if (empty($activity['question'])) {
202 $question = ['multiple' => $activity['question']['multiple']];
204 if (!empty($activity['question']['voters'])) {
205 $question['voters'] = $activity['question']['voters'];
208 if (!empty($activity['question']['end-time'])) {
209 $question['end-time'] = DateTimeFormat::utc($activity['question']['end-time']);
212 Post\Question::update($item['uri-id'], $question);
214 foreach ($activity['question']['options'] as $key => $option) {
215 $option = ['name' => $option['name'], 'replies' => $option['replies']];
216 Post\QuestionOption::update($item['uri-id'], $key, $option);
219 Logger::debug('Storing incoming question', ['type' => $activity['type'], 'uri-id' => $item['uri-id'], 'question' => $activity['question']]);
225 * @param array $activity Activity array
226 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
227 * @throws \ImagickException
229 public static function updateItem(array $activity)
231 $item = Post::selectFirst(['uri', 'uri-id', 'thr-parent', 'gravity', 'post-type', 'private'], ['uri' => $activity['id']]);
232 if (!DBA::isResult($item)) {
233 Logger::notice('No existing item, item will be created', ['uri' => $activity['id']]);
234 $item = self::createItem($activity, false);
236 Queue::remove($activity);
240 self::postItem($activity, $item);
244 $item['changed'] = DateTimeFormat::utcNow();
245 $item['edited'] = DateTimeFormat::utc($activity['updated']);
247 Post\Media::deleteByURIId($item['uri-id'], [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE, Post\Media::HTML]);
248 $item = self::processContent($activity, $item);
250 Queue::remove($activity);
254 self::storeAttachments($activity, $item);
255 self::storeQuestion($activity, $item);
257 Post\History::add($item['uri-id'], $item);
258 Item::update($item, ['uri' => $activity['id']]);
260 Queue::remove($activity);
262 if ($activity['object_type'] == 'as:Event') {
263 $posts = Post::select(['event-id', 'uid'], ["`uri` = ? AND `event-id` > ?", $activity['id'], 0]);
264 while ($post = DBA::fetch($posts)) {
265 self::updateEvent($post['event-id'], $activity);
271 * Update an existing event
273 * @param int $event_id
274 * @param array $activity
276 private static function updateEvent(int $event_id, array $activity)
278 $event = DBA::selectFirst('event', [], ['id' => $event_id]);
280 $event['edited'] = DateTimeFormat::utc($activity['updated']);
281 $event['summary'] = HTML::toBBCode($activity['name']);
282 $event['desc'] = HTML::toBBCode($activity['content']);
283 if (!empty($activity['start-time'])) {
284 $event['start'] = DateTimeFormat::utc($activity['start-time']);
286 if (!empty($activity['end-time'])) {
287 $event['finish'] = DateTimeFormat::utc($activity['end-time']);
289 $event['nofinish'] = empty($event['finish']);
290 $event['location'] = $activity['location'];
292 Logger::info('Updating event', ['uri' => $activity['id'], 'id' => $event_id]);
293 Event::store($event);
297 * Prepares data for a message
299 * @param array $activity Activity array
300 * @param bool $fetch_parents
302 * @return array Internal item
304 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
305 * @throws \ImagickException
307 public static function createItem(array $activity, bool $fetch_parents): array
310 $item['verb'] = Activity::POST;
311 $item['thr-parent'] = $activity['reply-to-id'];
313 if ($activity['reply-to-id'] == $activity['id']) {
314 $item['gravity'] = Item::GRAVITY_PARENT;
315 $item['object-type'] = Activity\ObjectType::NOTE;
317 $item['gravity'] = Item::GRAVITY_COMMENT;
318 $item['object-type'] = Activity\ObjectType::COMMENT;
321 if (!empty($activity['conversation'])) {
322 $item['conversation'] = $activity['conversation'];
323 } elseif (!empty($activity['context'])) {
324 $item['conversation'] = $activity['context'];
327 if (!empty($item['conversation'])) {
328 $conversation = Post::selectFirstThread(['uri'], ['conversation' => $item['conversation']]);
329 if (!empty($conversation)) {
330 Logger::debug('Got conversation', ['conversation' => $item['conversation'], 'parent' => $conversation]);
331 $item['parent-uri'] = $conversation['uri'];
332 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
338 Logger::debug('Create Item', ['id' => $activity['id'], 'conversation' => $item['conversation'] ?? '']);
339 if (empty($activity['author']) && empty($activity['actor'])) {
340 Logger::notice('Missing author and actor. We quit here.', ['activity' => $activity]);
341 Queue::remove($activity);
345 if (!in_array(0, $activity['receiver']) || !DI::config()->get('system', 'fetch_parents')) {
346 $fetch_parents = false;
349 if ($fetch_parents && empty($activity['directmessage']) && ($activity['id'] != $activity['reply-to-id']) && !Post::exists(['uri' => $activity['reply-to-id']])) {
350 $result = self::fetchParent($activity, !empty($conversation));
351 if (!empty($result) && ($item['thr-parent'] != $result) && Post::exists(['uri' => $result])) {
352 $item['thr-parent'] = $result;
356 $item['diaspora_signed_text'] = $activity['diaspora:comment'] ?? '';
358 if (empty($conversation) && empty($activity['directmessage']) && ($item['gravity'] != Item::GRAVITY_PARENT) && !Post::exists(['uri' => $item['thr-parent']])) {
359 Logger::notice('Parent not found, message will be discarded.', ['thr-parent' => $item['thr-parent']]);
360 if (!$fetch_parents) {
361 Queue::remove($activity);
366 $item['network'] = Protocol::ACTIVITYPUB;
367 $item['author-link'] = $activity['author'];
368 $item['author-id'] = Contact::getIdForURL($activity['author']);
369 $item['owner-link'] = $activity['actor'];
370 $item['owner-id'] = Contact::getIdForURL($activity['actor']);
372 if (in_array(0, $activity['receiver']) && !empty($activity['unlisted'])) {
373 $item['private'] = Item::UNLISTED;
374 } elseif (in_array(0, $activity['receiver'])) {
375 $item['private'] = Item::PUBLIC;
377 $item['private'] = Item::PRIVATE;
380 if (!empty($activity['raw'])) {
381 $item['source'] = $activity['raw'];
384 $item['protocol'] = Conversation::PARCEL_ACTIVITYPUB;
386 if (isset($activity['push'])) {
387 $item['direction'] = $activity['push'] ? Conversation::PUSH : Conversation::PULL;
390 if (!empty($activity['from-relay'])) {
391 $item['direction'] = Conversation::RELAY;
394 if ($activity['object_type'] == 'as:Article') {
395 $item['post-type'] = Item::PT_ARTICLE;
396 } elseif ($activity['object_type'] == 'as:Audio') {
397 $item['post-type'] = Item::PT_AUDIO;
398 } elseif ($activity['object_type'] == 'as:Document') {
399 $item['post-type'] = Item::PT_DOCUMENT;
400 } elseif ($activity['object_type'] == 'as:Event') {
401 $item['post-type'] = Item::PT_EVENT;
402 } elseif ($activity['object_type'] == 'as:Image') {
403 $item['post-type'] = Item::PT_IMAGE;
404 } elseif ($activity['object_type'] == 'as:Page') {
405 $item['post-type'] = Item::PT_PAGE;
406 } elseif ($activity['object_type'] == 'as:Question') {
407 $item['post-type'] = Item::PT_POLL;
408 } elseif ($activity['object_type'] == 'as:Video') {
409 $item['post-type'] = Item::PT_VIDEO;
411 $item['post-type'] = Item::PT_NOTE;
414 $item['isGroup'] = false;
416 if (!empty($activity['thread-completion'])) {
417 if ($activity['thread-completion'] != $item['owner-id']) {
418 $actor = Contact::getById($activity['thread-completion'], ['url']);
419 $item['causer-link'] = $actor['url'];
420 $item['causer-id'] = $activity['thread-completion'];
421 Logger::info('Use inherited actor as causer.', ['id' => $item['owner-id'], 'activity' => $activity['thread-completion'], 'owner' => $item['owner-link'], 'actor' => $actor['url']]);
423 // Store the original actor in the "causer" fields to enable the check for ignored or blocked contacts
424 $item['causer-link'] = $item['owner-link'];
425 $item['causer-id'] = $item['owner-id'];
426 Logger::info('Use actor as causer.', ['id' => $item['owner-id'], 'actor' => $item['owner-link']]);
429 $item['owner-link'] = $item['author-link'];
430 $item['owner-id'] = $item['author-id'];
433 if (!$item['isGroup'] && !empty($activity['receiver_urls']['as:audience'])) {
434 foreach ($activity['receiver_urls']['as:audience'] as $audience) {
435 $actor = APContact::getByURL($audience, false);
436 if (($actor['type'] ?? 'Person') == 'Group') {
437 Logger::debug('Group post detected via audience.', ['audience' => $audience, 'actor' => $activity['actor'], 'author' => $activity['author']]);
438 $item['isGroup'] = true;
439 $item['group-link'] = $item['owner-link'] = $audience;
440 $item['owner-id'] = Contact::getIdForURL($audience);
445 $owner = APContact::getByURL($item['owner-link'], false);
448 if (!$item['isGroup'] && (($owner['type'] ?? 'Person') == 'Group')) {
449 Logger::debug('Group post detected via owner.', ['actor' => $activity['actor'], 'author' => $activity['author']]);
450 $item['isGroup'] = true;
451 $item['group-link'] = $item['owner-link'];
452 } elseif (!empty($item['causer-link'])) {
453 $causer = APContact::getByURL($item['causer-link'], false);
456 if (!$item['isGroup'] && (($causer['type'] ?? 'Person') == 'Group')) {
457 Logger::debug('Group post detected via causer.', ['actor' => $activity['actor'], 'author' => $activity['author'], 'causer' => $item['causer-link']]);
458 $item['isGroup'] = true;
459 $item['group-link'] = $item['causer-link'];
462 if (!empty($item['group-link']) && empty($item['causer-link'])) {
463 $item['causer-link'] = $item['group-link'];
464 $item['causer-id'] = Contact::getIdForURL($item['causer-link']);
467 $item['uri'] = $activity['id'];
469 if (empty($activity['published']) || empty($activity['updated'])) {
470 DI::logger()->notice('published or updated keys are empty for activity', ['activity' => $activity]);
473 $item['created'] = DateTimeFormat::utc($activity['published'] ?? 'now');
474 $item['edited'] = DateTimeFormat::utc($activity['updated'] ?? 'now');
475 $guid = $activity['sc:identifier'] ?: self::getGUIDByURL($item['uri']);
476 $item['guid'] = $activity['diaspora:guid'] ?: $guid;
478 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
479 if (empty($item['uri-id'])) {
480 Logger::warning('Unable to get a uri-id for an item uri', ['uri' => $item['uri'], 'guid' => $item['guid']]);
484 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
486 $item = self::processContent($activity, $item);
488 Logger::info('Message was not processed');
489 Queue::remove($activity);
493 $item['plink'] = $activity['alternate-url'] ?? $item['uri'];
495 self::storeAttachments($activity, $item);
496 self::storeQuestion($activity, $item);
498 // We received the post via AP, so we set the protocol of the server to AP
499 $contact = Contact::getById($item['author-id'], ['gsid']);
500 if (!empty($contact['gsid'])) {
501 GServer::setProtocol($contact['gsid'], Post\DeliveryData::ACTIVITYPUB);
504 if ($item['author-id'] != $item['owner-id']) {
505 $contact = Contact::getById($item['owner-id'], ['gsid']);
506 if (!empty($contact['gsid'])) {
507 GServer::setProtocol($contact['gsid'], Post\DeliveryData::ACTIVITYPUB);
515 * Fetch and process parent posts for the given activity
517 * @param array $activity
518 * @param bool $in_background
522 private static function fetchParent(array $activity, bool $in_background = false): string
524 if (self::isFetched($activity['reply-to-id'])) {
525 Logger::info('Id is already fetched', ['id' => $activity['reply-to-id']]);
529 self::addActivityId($activity['reply-to-id']);
531 $completion = $activity['completion-mode'] ?? Receiver::COMPLETION_NONE;
533 if (DI::config()->get('system', 'decoupled_receiver') && ($completion != Receiver::COMPLETION_MANUAL)) {
534 $in_background = true;
537 $recursion_depth = $activity['recursion-depth'] ?? 0;
539 if (!$in_background && ($recursion_depth < DI::config()->get('system', 'max_recursion_depth'))) {
540 Logger::info('Parent not found. Try to refetch it.', ['completion' => $completion, 'recursion-depth' => $recursion_depth, 'parent' => $activity['reply-to-id']]);
541 $result = self::fetchMissingActivity($activity['reply-to-id'], $activity, '', Receiver::COMPLETION_AUTO);
542 if (empty($result) && self::isActivityGone($activity['reply-to-id'])) {
543 Logger::notice('The activity is gone, the queue entry will be deleted', ['parent' => $activity['reply-to-id']]);
544 if (!empty($activity['entry-id'])) {
545 Queue::deleteById($activity['entry-id']);
547 } elseif (!empty($result)) {
548 $post = Post::selectFirstPost(['uri'], ['uri' => [$result, $activity['reply-to-id']]]);
549 if (!empty($post['uri'])) {
550 Logger::info('The activity has been fetched and created.', ['result' => $result, 'uri' => $post['uri']]);
553 Logger::notice('The activity exists but has not been created, the queue entry will be deleted.', ['parent' => $result]);
554 if (!empty($activity['entry-id'])) {
555 Queue::deleteById($activity['entry-id']);
560 } elseif (self::isActivityGone($activity['reply-to-id'])) {
561 Logger::notice('The activity is gone. We will not spawn a worker. The queue entry will be deleted', ['parent' => $activity['reply-to-id']]);
562 if ($in_background) {
563 // fetching in background is done for all activities where we have got the conversation
564 // There we only delete the single activity and not the whole thread since we can store the
565 // other posts in the thread even with missing posts.
566 Queue::remove($activity);
567 } elseif (!empty($activity['entry-id'])) {
568 Queue::deleteById($activity['entry-id']);
571 } elseif ($in_background) {
572 Logger::notice('Fetching is done in the background.', ['parent' => $activity['reply-to-id']]);
574 Logger::notice('Recursion level is too high.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
577 if (!Fetch::hasWorker($activity['reply-to-id'])) {
578 Logger::notice('Fetching is done by worker.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
579 Fetch::add($activity['reply-to-id']);
580 $activity['recursion-depth'] = 0;
581 $wid = Worker::add(Worker::PRIORITY_HIGH, 'FetchMissingActivity', $activity['reply-to-id'], $activity, '', Receiver::COMPLETION_ASYNC);
582 Fetch::setWorkerId($activity['reply-to-id'], $wid);
584 Logger::debug('Activity will already be fetched via a worker.', ['url' => $activity['reply-to-id']]);
591 * Check if a given activity is no longer available
597 public static function isActivityGone(string $url): bool
599 if (Network::isUrlBlocked($url)) {
604 $curlResult = HTTPSignature::fetchRaw($url, 0);
605 } catch (\Exception $exception) {
606 Logger::notice('Error fetching url', ['url' => $url, 'exception' => $exception]);
610 // @todo To ensure that the remote system is working correctly, we can check if the "Content-Type" contains JSON
611 if (in_array($curlResult->getReturnCode(), [401, 404])) {
615 if ($curlResult->isSuccess()) {
616 $object = json_decode($curlResult->getBody(), true);
617 if (!empty($object)) {
618 $activity = JsonLD::compact($object);
619 if (JsonLD::fetchElement($activity, '@type') == 'as:Tombstone') {
623 } elseif ($curlResult->getReturnCode() == 0) {
624 $host = parse_url($url, PHP_URL_HOST);
625 if (!(filter_var($host, FILTER_VALIDATE_IP) || @dns_get_record($host . '.', DNS_A + DNS_AAAA))) {
635 * @param array $activity
636 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
637 * @throws \ImagickException
639 public static function deleteItem(array $activity)
641 $owner = Contact::getIdForURL($activity['actor']);
643 Logger::info('Deleting item', ['object' => $activity['object_id'], 'owner' => $owner]);
644 Item::markForDeletion(['uri' => $activity['object_id'], 'owner-id' => $owner]);
645 Queue::remove($activity);
649 * Prepare the item array for an activity
651 * @param array $activity Activity array
652 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
653 * @throws \ImagickException
655 public static function addTag(array $activity)
657 if (empty($activity['object_content']) || empty($activity['object_id'])) {
661 foreach ($activity['receiver'] as $receiver) {
662 $item = Post::selectFirst(['id', 'uri-id', 'origin', 'author-link'], ['uri' => $activity['target_id'], 'uid' => $receiver]);
663 if (!DBA::isResult($item)) {
664 // We don't fetch missing content for this purpose
668 if (($item['author-link'] != $activity['actor']) && !$item['origin']) {
669 Logger::info('Not origin, not from the author, skipping update', ['id' => $item['id'], 'author' => $item['author-link'], 'actor' => $activity['actor']]);
673 Tag::store($item['uri-id'], Tag::HASHTAG, $activity['object_content'], $activity['object_id']);
674 Logger::info('Tagged item', ['id' => $item['id'], 'tag' => $activity['object_content'], 'uri' => $activity['target_id'], 'actor' => $activity['actor']]);
679 * Prepare the item array for an activity
681 * @param array $activity Activity array
682 * @param string $verb Activity verb
683 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
684 * @throws \ImagickException
686 public static function createActivity(array $activity, string $verb)
688 $activity['reply-to-id'] = $activity['object_id'];
689 $item = self::createItem($activity, false);
691 Logger::debug('Activity was not prepared', ['id' => $activity['object_id']]);
695 $item['verb'] = $verb;
696 $item['thr-parent'] = $activity['object_id'];
697 $item['gravity'] = Item::GRAVITY_ACTIVITY;
698 unset($item['post-type']);
699 $item['object-type'] = Activity\ObjectType::NOTE;
701 if (!empty($activity['content'])) {
702 $item['body'] = HTML::toBBCode($activity['content']);
705 $item['diaspora_signed_text'] = $activity['diaspora:like'] ?? '';
707 self::postItem($activity, $item);
711 * Fetch the Uri-Id of a post for the "featured" collection
713 * @param array $activity
716 private static function getUriIdForFeaturedCollection(array $activity)
718 $actor = APContact::getByURL($activity['actor']);
723 // Refetch the account when the "featured" collection is missing.
724 // This can be removed in a future version (end of 2022 should be good).
725 if (empty($actor['featured'])) {
726 $actor = APContact::getByURL($activity['actor'], true);
732 $parent = Post::selectFirst(['uri-id', 'author-id'], ['uri' => $activity['object_id']]);
733 if (empty($parent['uri-id'])) {
734 if (self::fetchMissingActivity($activity['object_id'], $activity, '', Receiver::COMPLETION_AUTO)) {
735 $parent = Post::selectFirst(['uri-id'], ['uri' => $activity['object_id']]);
739 if (!empty($parent['uri-id'])) {
747 * Add a post to the "Featured" collection
749 * @param array $activity
751 public static function addToFeaturedCollection(array $activity)
753 $post = self::getUriIdForFeaturedCollection($activity);
755 Queue::remove($activity);
759 Logger::debug('Add post to featured collection', ['post' => $post]);
761 Post\Collection::add($post['uri-id'], Post\Collection::FEATURED, $post['author-id']);
762 Queue::remove($activity);
766 * Remove a post to the "Featured" collection
768 * @param array $activity
770 public static function removeFromFeaturedCollection(array $activity)
772 $post = self::getUriIdForFeaturedCollection($activity);
774 Queue::remove($activity);
778 Logger::debug('Remove post from featured collection', ['post' => $post]);
780 Post\Collection::remove($post['uri-id'], Post\Collection::FEATURED);
781 Queue::remove($activity);
787 * @param array $activity Activity array
790 * @return int event id
793 public static function createEvent(array $activity, array $item): int
795 $event['summary'] = HTML::toBBCode($activity['name'] ?: $activity['summary']);
796 $event['desc'] = HTML::toBBCode($activity['content'] ?? '');
797 if (!empty($activity['start-time'])) {
798 $event['start'] = DateTimeFormat::utc($activity['start-time']);
800 if (!empty($activity['end-time'])) {
801 $event['finish'] = DateTimeFormat::utc($activity['end-time']);
803 $event['nofinish'] = empty($event['finish']);
804 $event['location'] = $activity['location'];
805 $event['cid'] = $item['contact-id'];
806 $event['uid'] = $item['uid'];
807 $event['uri'] = $item['uri'];
808 $event['edited'] = $item['edited'];
809 $event['private'] = $item['private'];
810 $event['guid'] = $item['guid'];
811 $event['plink'] = $item['plink'];
812 $event['network'] = $item['network'];
813 $event['protocol'] = $item['protocol'];
814 $event['direction'] = $item['direction'];
815 $event['source'] = $item['source'];
817 $ev = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
818 if (DBA::isResult($ev)) {
819 $event['id'] = $ev['id'];
822 $event_id = Event::store($event);
824 Logger::info('Event was stored', ['id' => $event_id]);
830 * Process the content
832 * @param array $activity Activity array
834 * @return array|bool Returns the item array or false if there was an unexpected occurrence
837 private static function processContent(array $activity, array $item)
839 if (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/markdown')) {
840 $item['title'] = strip_tags($activity['name'] ?? '');
841 $content = Markdown::toBBCode($activity['content']);
842 } elseif (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/bbcode')) {
843 $item['title'] = $activity['name'];
844 $content = $activity['content'];
846 // By default assume "text/html"
847 $item['title'] = HTML::toBBCode($activity['name'] ?? '');
848 $content = HTML::toBBCode($activity['content'] ?? '');
851 $item['title'] = trim(BBCode::toPlaintext($item['title']));
853 if (!empty($activity['languages'])) {
854 $item['language'] = self::processLanguages($activity['languages']);
857 if (!empty($activity['emojis'])) {
858 $content = self::replaceEmojis($item['uri-id'], $content, $activity['emojis']);
861 $content = self::addMentionLinks($content, $activity['tags']);
863 if (!empty($activity['quote-url'])) {
864 $id = Item::fetchByLink($activity['quote-url'], 0, ActivityPub\Receiver::COMPLETION_ASYNC);
866 $shared_item = Post::selectFirst(['uri-id'], ['id' => $id]);
867 $item['quote-uri-id'] = $shared_item['uri-id'];
868 } elseif ($uri_id = ItemURI::getIdByURI($activity['quote-url'], false)) {
869 Logger::info('Quote was not fetched but the uri-id existed', ['guid' => $item['guid'], 'uri-id' => $item['uri-id'], 'quote' => $activity['quote-url'], 'uri-id' => $uri_id]);
870 $item['quote-uri-id'] = $uri_id;
872 Logger::info('Quote was not fetched', ['guid' => $item['guid'], 'uri-id' => $item['uri-id'], 'quote' => $activity['quote-url']]);
876 if (!empty($activity['source'])) {
877 $item['body'] = $activity['source'];
878 $item['raw-body'] = $content;
880 $quote_uri_id = Item::getQuoteUriId($item['body']);
881 if (empty($item['quote-uri-id']) && !empty($quote_uri_id)) {
882 $item['quote-uri-id'] = $quote_uri_id;
885 $item['body'] = BBCode::removeSharedData($item['body']);
887 $parent_uri = $item['parent-uri'] ?? $item['thr-parent'];
888 if (empty($activity['directmessage']) && ($parent_uri != $item['uri']) && ($item['gravity'] == Item::GRAVITY_COMMENT)) {
889 $parent = Post::selectFirst(['id', 'uri-id', 'private', 'author-link', 'alias'], ['uri' => $parent_uri]);
890 if (!DBA::isResult($parent)) {
891 Logger::warning('Unknown parent item.', ['uri' => $parent_uri]);
894 $content = self::removeImplicitMentionsFromBody($content, $parent);
896 $item['content-warning'] = HTML::toBBCode($activity['summary'] ?? '');
897 $item['raw-body'] = $item['body'] = $content;
900 if (!empty($item['author-id']) && ($item['author-id'] == $item['owner-id'])) {
901 foreach (Tag::getFromBody($item['body'], Tag::TAG_CHARACTER[Tag::EXCLUSIVE_MENTION]) as $tag) {
902 $actor = APContact::getByURL($tag[2], false);
903 if (($actor['type'] ?? 'Person') == 'Group') {
904 Logger::debug('Group post detected via exclusive mention.', ['mention' => $actor['url'], 'actor' => $activity['actor'], 'author' => $activity['author']]);
905 $item['isGroup'] = true;
906 $item['group-link'] = $item['owner-link'] = $actor['url'];
907 $item['owner-id'] = Contact::getIdForURL($actor['url']);
913 self::storeFromBody($item);
914 self::storeTags($item['uri-id'], $activity['tags']);
916 self::storeReceivers($item['uri-id'], $activity['receiver_urls'] ?? []);
918 $item['location'] = $activity['location'];
920 if (!empty($activity['latitude']) && !empty($activity['longitude'])) {
921 $item['coord'] = $activity['latitude'] . ' ' . $activity['longitude'];
924 $item['app'] = $activity['generator'];
930 * Store hashtags and mentions
934 private static function storeFromBody(array $item)
936 // Make sure to delete all existing tags (can happen when called via the update functionality)
937 DBA::delete('post-tag', ['uri-id' => $item['uri-id']]);
939 Tag::storeFromBody($item['uri-id'], $item['body'], '@!');
943 * Generate a GUID out of an URL of an ActivityPub post.
945 * @param string $url message URL
946 * @return string with GUID
948 private static function getGUIDByURL(string $url): string
950 $parsed = parse_url($url);
952 $host_hash = hash('crc32', $parsed['host']);
954 unset($parsed["scheme"]);
955 unset($parsed["host"]);
957 $path = implode("/", $parsed);
959 return $host_hash . '-'. hash('fnv164', $path) . '-'. hash('joaat', $path);
963 * Checks if an incoming message is wanted
965 * @param array $activity
967 * @return boolean Is the message wanted?
969 private static function isSolicitedMessage(array $activity, array $item): bool
971 // The checks are split to improve the support when searching why a message was accepted.
972 if (count($activity['receiver']) != 1) {
973 // The message has more than one receiver, so it is wanted.
974 Logger::debug('Message has got several receivers - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
978 if ($item['private'] == Item::PRIVATE) {
979 // We only look at public posts here. Private posts are expected to be intentionally posted to the single receiver.
980 Logger::debug('Message is private - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
984 if (!empty($activity['from-relay'])) {
985 // We check relay posts at another place. When it arrived here, the message is already checked.
986 Logger::debug('Message is a relay post that is already checked - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
990 if (in_array($activity['completion-mode'] ?? Receiver::COMPLETION_NONE, [Receiver::COMPLETION_MANUAL, Receiver::COMPLETION_ANNOUNCE])) {
991 // Manual completions and completions caused by reshares are allowed without any further checks.
992 Logger::debug('Message is in completion mode - accepted', ['mode' => $activity['completion-mode'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
996 if ($item['gravity'] != Item::GRAVITY_PARENT) {
997 // We cannot reliably check at this point if a comment or activity belongs to an accepted post or needs to be fetched
998 // This can possibly be improved in the future.
999 Logger::debug('Message is no parent - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
1003 $tags = array_column(Tag::getByURIId($item['uri-id'], [Tag::HASHTAG]), 'name');
1004 if (Relay::isSolicitedPost($tags, $item['title'] . ' ' . ($item['content-warning'] ?? '') . ' ' . $item['body'], $item['author-id'], $item['uri'], Protocol::ACTIVITYPUB, $activity['thread-completion'] ?? 0)) {
1005 Logger::debug('Post is accepted because of the relay settings', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
1013 * Creates an item post
1015 * @param array $activity Activity data
1016 * @param array $item item array
1017 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1018 * @throws \ImagickException
1020 public static function postItem(array $activity, array $item)
1028 ksort($activity['receiver']);
1030 if (!self::isSolicitedMessage($activity, $item)) {
1031 DBA::delete('item-uri', ['id' => $item['uri-id']]);
1032 if (!empty($activity['entry-id'])) {
1033 Queue::deleteById($activity['entry-id']);
1038 foreach ($activity['receiver'] as $receiver) {
1039 if ($receiver == -1) {
1043 if (($receiver != 0) && empty($item['parent-uri-id']) && !empty($item['thr-parent-id'])) {
1044 $parent = Post::selectFirst(['parent-uri-id', 'parent-uri'], ['uri-id' => $item['thr-parent-id'], 'uid' => [0, $receiver]]);
1045 if (!empty($parent['parent-uri-id'])) {
1046 $item['parent-uri-id'] = $parent['parent-uri-id'];
1047 $item['parent-uri'] = $parent['parent-uri'];
1051 $item['uid'] = $receiver;
1053 $type = $activity['reception_type'][$receiver] ?? Receiver::TARGET_UNKNOWN;
1055 case Receiver::TARGET_TO:
1056 $item['post-reason'] = Item::PR_TO;
1058 case Receiver::TARGET_CC:
1059 $item['post-reason'] = Item::PR_CC;
1061 case Receiver::TARGET_BTO:
1062 $item['post-reason'] = Item::PR_BTO;
1064 case Receiver::TARGET_BCC:
1065 $item['post-reason'] = Item::PR_BCC;
1067 case Receiver::TARGET_AUDIENCE:
1068 $item['post-reason'] = Item::PR_AUDIENCE;
1070 case Receiver::TARGET_FOLLOWER:
1071 $item['post-reason'] = Item::PR_FOLLOWER;
1073 case Receiver::TARGET_ANSWER:
1074 $item['post-reason'] = Item::PR_COMMENT;
1076 case Receiver::TARGET_GLOBAL:
1077 $item['post-reason'] = Item::PR_GLOBAL;
1080 $item['post-reason'] = Item::PR_NONE;
1083 $item['post-reason'] = Item::getPostReason($item);
1085 if (in_array($item['post-reason'], [Item::PR_GLOBAL, Item::PR_NONE])) {
1086 if (!empty($activity['from-relay'])) {
1087 $item['post-reason'] = Item::PR_RELAY;
1088 } elseif (!empty($activity['thread-completion'])) {
1089 $item['post-reason'] = Item::PR_FETCHED;
1090 } elseif (!empty($activity['push'])) {
1091 $item['post-reason'] = Item::PR_PUSHED;
1093 } elseif (($item['post-reason'] == Item::PR_FOLLOWER) && !empty($activity['from-relay'])) {
1094 // When a post arrives via a relay and we follow the author, we have to override the causer.
1095 // Otherwise the system assumes that we follow the relay. (See "addRowInformation")
1096 Logger::debug('Relay post for follower', ['receiver' => $receiver, 'guid' => $item['guid'], 'relay' => $activity['from-relay']]);
1097 $item['causer-id'] = ($item['gravity'] == Item::GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
1100 if ($item['isGroup']) {
1101 $item['contact-id'] = Contact::getIdForURL($item['group-link'], $receiver);
1103 $item['contact-id'] = Contact::getIdForURL($item['author-link'], $receiver);
1106 if (($receiver != 0) && empty($item['contact-id'])) {
1107 $item['contact-id'] = Contact::getIdForURL($activity['author']);
1110 if (!empty($activity['directmessage']) && self::postMail($item)) {
1114 if (($receiver != 0) && ($item['gravity'] == Item::GRAVITY_PARENT) && !in_array($item['post-reason'], [Item::PR_FOLLOWER, Item::PR_TAG, item::PR_TO, Item::PR_CC, Item::PR_AUDIENCE])) {
1115 if (!$item['isGroup']) {
1116 if ($item['post-reason'] == Item::PR_BCC) {
1117 Logger::info('Top level post via BCC from a non sharer, ignoring', ['uid' => $receiver, 'contact' => $item['contact-id'], 'url' => $item['uri']]);
1121 if ((DI::pConfig()->get($receiver, 'system', 'accept_only_sharer') != Item::COMPLETION_LIKE)
1122 && in_array($activity['thread-children-type'] ?? '', Receiver::ACTIVITY_TYPES)) {
1123 Logger::info('Top level post from thread completion from a non sharer had been initiated via an activity, ignoring',
1124 ['type' => $activity['thread-children-type'], 'user' => $item['uid'], 'causer' => $item['causer-link'], 'author' => $activity['author'], 'url' => $item['uri']]);
1130 $user = User::getById($receiver, ['account-type']);
1131 if (!empty($user['account-type'])) {
1132 $isGroup = ($user['account-type'] == User::ACCOUNT_TYPE_COMMUNITY);
1135 if ((DI::pConfig()->get($receiver, 'system', 'accept_only_sharer') == Item::COMPLETION_NONE)
1136 && ((!$isGroup && !$item['isGroup'] && ($activity['type'] != 'as:Announce'))
1137 || !Contact::isSharingByURL($activity['actor'], $receiver))) {
1138 Logger::info('Actor is a non sharer, is no group or it is no announce', ['uid' => $receiver, 'actor' => $activity['actor'], 'url' => $item['uri'], 'type' => $activity['type']]);
1142 Logger::info('Accepting post', ['uid' => $receiver, 'url' => $item['uri']]);
1145 if (!self::hasParents($item, $receiver)) {
1149 if (($item['gravity'] != Item::GRAVITY_ACTIVITY) && ($activity['object_type'] == 'as:Event')) {
1150 $event_id = self::createEvent($activity, $item);
1152 $item = Event::getItemArrayForImportedId($event_id, $item);
1155 $item_id = Item::insert($item);
1157 Logger::info('Item insertion successful', ['user' => $item['uid'], 'item_id' => $item_id]);
1160 Logger::notice('Item insertion aborted', ['uri' => $item['uri'], 'uid' => $item['uid']]);
1161 if (($item['uid'] == 0) && (count($activity['receiver']) > 1)) {
1162 Logger::info('Public item was aborted. We skip for all users.', ['uri' => $item['uri']]);
1167 if ($item['uid'] == 0) {
1172 Queue::remove($activity);
1174 if ($success && Queue::hasChildren($item['uri']) && Post::exists(['uri' => $item['uri']])) {
1175 Queue::processReplyByUri($item['uri']);
1178 // Store send a follow request for every reshare - but only when the item had been stored
1179 if ($stored && ($item['private'] != Item::PRIVATE) && ($item['gravity'] == Item::GRAVITY_PARENT) && !empty($item['author-link']) && ($item['author-link'] != $item['owner-link'])) {
1180 $author = APContact::getByURL($item['owner-link'], false);
1181 // We send automatic follow requests for reshared messages. (We don't need though for group posts)
1182 if ($author['type'] != 'Group') {
1183 Logger::info('Send follow request', ['uri' => $item['uri'], 'stored' => $stored, 'to' => $item['author-link']]);
1184 ActivityPub\Transmitter::sendFollowObject($item['uri'], $item['author-link']);
1190 * Checks if there are parent posts for the given receiver.
1191 * If not, then the system will try to add them.
1193 * @param array $item
1194 * @param integer $receiver
1197 private static function hasParents(array $item, int $receiver)
1199 if (($receiver == 0) || ($item['gravity'] == Item::GRAVITY_PARENT)) {
1203 $fields = ['causer-id' => $item['causer-id'] ?? $item['author-id'], 'post-reason' => Item::PR_FETCHED];
1207 if ($item['verb'] != Activity::ANNOUNCE) {
1208 switch (DI::pConfig()->get($receiver, 'system', 'accept_only_sharer')) {
1209 case Item::COMPLETION_COMMENT:
1210 $add_parent = ($item['gravity'] != Item::GRAVITY_ACTIVITY);
1213 case Item::COMPLETION_NONE:
1214 $add_parent = false;
1220 $add_parent = Contact::isSharing($fields['causer-id'], $receiver);
1221 if (!$add_parent && ($item['author-id'] != $fields['causer-id'])) {
1222 $add_parent = Contact::isSharing($item['author-id'], $receiver);
1224 if (!$add_parent && !in_array($item['owner-id'], [$fields['causer-id'], $item['author-id']])) {
1225 $add_parent = Contact::isSharing($item['owner-id'], $receiver);
1229 $has_parents = false;
1231 if (!empty($item['parent-uri-id'])) {
1232 if (Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $receiver])) {
1233 $has_parents = true;
1234 } elseif ($add_parent && Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1235 $stored = Item::storeForUserByUriId($item['parent-uri-id'], $receiver, $fields);
1236 $has_parents = (bool)$stored;
1238 Logger::notice('Inserted missing parent post', ['stored' => $stored, 'uid' => $receiver, 'parent' => $item['parent-uri']]);
1240 Logger::notice('Parent could not be added.', ['uid' => $receiver, 'uri' => $item['uri'], 'parent' => $item['parent-uri']]);
1243 } elseif ($add_parent) {
1244 Logger::debug('Parent does not exist.', ['uid' => $receiver, 'uri' => $item['uri'], 'parent' => $item['parent-uri']]);
1246 Logger::debug('Parent should not be added.', ['uid' => $receiver, 'gravity' => $item['gravity'], 'verb' => $item['verb'], 'guid' => $item['guid'], 'uri' => $item['uri'], 'parent' => $item['parent-uri']]);
1250 if (empty($item['parent-uri-id']) || ($item['thr-parent-id'] != $item['parent-uri-id'])) {
1251 if (Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $receiver])) {
1252 $has_parents = true;
1253 } elseif (($has_parents || $add_parent) && Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => 0])) {
1254 $stored = Item::storeForUserByUriId($item['thr-parent-id'], $receiver, $fields);
1255 $has_parents = $has_parents || (bool)$stored;
1257 Logger::notice('Inserted missing thread parent post', ['stored' => $stored, 'uid' => $receiver, 'thread-parent' => $item['thr-parent']]);
1259 Logger::notice('Thread parent could not be added.', ['uid' => $receiver, 'uri' => $item['uri'], 'thread-parent' => $item['thr-parent']]);
1261 } elseif ($add_parent) {
1262 Logger::debug('Thread parent does not exist.', ['uid' => $receiver, 'uri' => $item['uri'], 'thread-parent' => $item['thr-parent']]);
1264 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']]);
1268 return $has_parents;
1272 * Store tags and mentions into the tag table
1274 * @param integer $uriid
1275 * @param array $tags
1277 private static function storeTags(int $uriid, array $tags = null)
1279 foreach ($tags as $tag) {
1280 if (empty($tag['name']) || empty($tag['type']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
1284 $hash = substr($tag['name'], 0, 1);
1286 if ($tag['type'] == 'Mention') {
1287 if (in_array($hash, [Tag::TAG_CHARACTER[Tag::MENTION],
1288 Tag::TAG_CHARACTER[Tag::EXCLUSIVE_MENTION],
1289 Tag::TAG_CHARACTER[Tag::IMPLICIT_MENTION]])) {
1290 $tag['name'] = substr($tag['name'], 1);
1292 $type = Tag::IMPLICIT_MENTION;
1294 if (!empty($tag['href'])) {
1295 $apcontact = APContact::getByURL($tag['href']);
1296 if (!empty($apcontact['name']) || !empty($apcontact['nick'])) {
1297 $tag['name'] = $apcontact['name'] ?: $apcontact['nick'];
1300 } elseif ($tag['type'] == 'Hashtag') {
1301 if ($hash == Tag::TAG_CHARACTER[Tag::HASHTAG]) {
1302 $tag['name'] = substr($tag['name'], 1);
1304 $type = Tag::HASHTAG;
1307 if (empty($tag['name'])) {
1311 Tag::store($uriid, $type, $tag['name'], $tag['href']);
1315 public static function storeReceivers(int $uriid, array $receivers)
1317 foreach (['as:to' => Tag::TO, 'as:cc' => Tag::CC, 'as:bto' => Tag::BTO, 'as:bcc' => Tag::BCC, 'as:audience' => Tag::AUDIENCE, 'as:attributedTo' => Tag::ATTRIBUTED] as $element => $type) {
1318 if (!empty($receivers[$element])) {
1319 foreach ($receivers[$element] as $receiver) {
1320 if ($receiver == ActivityPub::PUBLIC_COLLECTION) {
1321 $name = Receiver::PUBLIC_COLLECTION;
1322 } elseif ($path = parse_url($receiver, PHP_URL_PATH)) {
1323 $name = trim($path, '/');
1324 } elseif ($host = parse_url($receiver, PHP_URL_HOST)) {
1327 Logger::warning('Unable to coerce name from receiver', ['element' => $element, 'type' => $type, 'receiver' => $receiver]);
1331 $target = Tag::getTargetType($receiver);
1332 Logger::debug('Got target type', ['type' => $target, 'url' => $receiver]);
1333 Tag::store($uriid, $type, $name, $receiver, $target);
1340 * Creates an mail post
1342 * @param array $item item array
1343 * @return int|bool New mail table row id or false on error
1344 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1346 private static function postMail(array $item): bool
1348 if (($item['gravity'] != Item::GRAVITY_PARENT) && !DBA::exists('mail', ['uri' => $item['thr-parent'], 'uid' => $item['uid']])) {
1349 Logger::info('Parent not found, mail will be discarded.', ['uid' => $item['uid'], 'uri' => $item['thr-parent']]);
1353 if (!Contact::isFollower($item['contact-id'], $item['uid']) && !Contact::isSharing($item['contact-id'], $item['uid'])) {
1354 Logger::info('Contact is not a sharer or follower, mail will be discarded.', ['item' => $item]);
1358 Logger::info('Direct Message', $item);
1361 $msg['uid'] = $item['uid'];
1363 $msg['contact-id'] = $item['contact-id'];
1365 $contact = Contact::getById($item['contact-id'], ['name', 'url', 'photo']);
1366 $msg['from-name'] = $contact['name'];
1367 $msg['from-url'] = $contact['url'];
1368 $msg['from-photo'] = $contact['photo'];
1370 $msg['uri'] = $item['uri'];
1371 $msg['created'] = $item['created'];
1373 $parent = DBA::selectFirst('mail', ['parent-uri', 'title'], ['uri' => $item['thr-parent']]);
1374 if (DBA::isResult($parent)) {
1375 $msg['parent-uri'] = $parent['parent-uri'];
1376 $msg['title'] = $parent['title'];
1378 $msg['parent-uri'] = $item['thr-parent'];
1380 if (!empty($item['title'])) {
1381 $msg['title'] = $item['title'];
1382 } elseif (!empty($item['content-warning'])) {
1383 $msg['title'] = $item['content-warning'];
1385 // Trying to generate a title out of the body
1386 $title = $item['body'];
1388 while (preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $title, $matches)) {
1389 $title = $matches[3];
1392 $title = trim(BBCode::toPlaintext($title));
1394 if (strlen($title) > 20) {
1395 $title = substr($title, 0, 20) . '...';
1398 $msg['title'] = $title;
1401 $msg['body'] = $item['body'];
1403 return Mail::insert($msg);
1407 * Fetch featured posts from a contact with the given url
1409 * @param string $url
1412 public static function fetchFeaturedPosts(string $url)
1414 Logger::info('Fetch featured posts', ['contact' => $url]);
1416 $apcontact = APContact::getByURL($url);
1417 if (empty($apcontact['featured'])) {
1418 Logger::info('Contact does not have a featured collection', ['contact' => $url]);
1422 $pcid = Contact::getIdForURL($url, 0, false);
1424 Logger::notice('Contact not found', ['contact' => $url]);
1428 $posts = Post\Collection::selectToArrayForContact($pcid, Post\Collection::FEATURED);
1429 if (!empty($posts)) {
1430 $old_featured = array_column($posts, 'uri-id');
1435 $featured = ActivityPub::fetchItems($apcontact['featured']);
1436 if (empty($featured)) {
1437 Logger::info('Contact does not have featured posts', ['contact' => $url]);
1439 foreach ($old_featured as $uri_id) {
1440 Post\Collection::remove($uri_id, Post\Collection::FEATURED);
1441 Logger::debug('Removed no longer featured post', ['uri-id' => $uri_id, 'contact' => $url]);
1449 foreach ($featured as $post) {
1450 if (empty($post['id'])) {
1453 $id = Item::fetchByLink($post['id'], 0, ActivityPub\Receiver::COMPLETION_ASYNC);
1455 $item = Post::selectFirst(['uri-id', 'featured', 'author-id'], ['id' => $id]);
1456 if (!empty($item['uri-id'])) {
1457 if (!$item['featured']) {
1458 Post\Collection::add($item['uri-id'], Post\Collection::FEATURED, $item['author-id']);
1459 Logger::debug('Added featured post', ['uri-id' => $item['uri-id'], 'contact' => $url]);
1462 Logger::debug('Post already had been featured', ['uri-id' => $item['uri-id'], 'contact' => $url]);
1466 $index = array_search($item['uri-id'], $old_featured);
1467 if (!($index === false)) {
1468 unset($old_featured[$index]);
1474 foreach ($old_featured as $uri_id) {
1475 Post\Collection::remove($uri_id, Post\Collection::FEATURED);
1476 Logger::debug('Removed no longer featured post', ['uri-id' => $uri_id, 'contact' => $url]);
1479 Logger::info('Fetched featured posts', ['new' => $new, 'old' => $old, 'contact' => $url]);
1482 public static function fetchCachedActivity(string $url, int $uid): array
1484 $cachekey = self::CACHEKEY_FETCH_ACTIVITY . $uid . ':' . hash('sha256', $url);
1485 $object = DI::cache()->get($cachekey);
1487 if (!is_null($object)) {
1488 if (!empty($object)) {
1489 Logger::debug('Fetch from cache', ['url' => $url, 'uid' => $uid]);
1491 Logger::debug('Fetch from negative cache', ['url' => $url, 'uid' => $uid]);
1496 $object = HTTPSignature::fetch($url, $uid);
1497 if (empty($object)) {
1498 Logger::notice('Activity was not fetchable, aborting.', ['url' => $url, 'uid' => $uid]);
1499 // We perform negative caching.
1500 DI::cache()->set($cachekey, [], Duration::FIVE_MINUTES);
1504 if (empty($object['id'])) {
1505 Logger::notice('Activity has got not id, aborting. ', ['url' => $url, 'object' => $object]);
1508 DI::cache()->set($cachekey, $object, Duration::FIVE_MINUTES);
1510 Logger::debug('Activity was fetched successfully', ['url' => $url, 'uid' => $uid]);
1516 * Fetches missing posts
1518 * @param string $url message URL
1519 * @param array $child activity array with the child of this message
1520 * @param string $relay_actor Relay actor
1521 * @param int $completion Completion mode, see Receiver::COMPLETION_*
1522 * @param int $uid User id that is used to fetch the activity
1523 * @return string fetched message URL. An empty string indicates a temporary error, null indicates a permament error,
1524 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1525 * @throws \ImagickException
1527 public static function fetchMissingActivity(string $url, array $child = [], string $relay_actor = '', int $completion = Receiver::COMPLETION_MANUAL, int $uid = 0): ?string
1529 if (Network::isUrlBlocked($url)) {
1534 $curlResult = HTTPSignature::fetchRaw($url, $uid);
1535 } catch (\Exception $exception) {
1536 Logger::notice('Error fetching url', ['url' => $url, 'exception' => $exception]);
1540 if (empty($curlResult)) {
1544 $body = $curlResult->getBody();
1545 if (!$curlResult->isSuccess() || empty($body)) {
1546 if (in_array($curlResult->getReturnCode(), [403, 404, 406, 410])) {
1552 $object = json_decode($body, true);
1553 if (empty($object) || !is_array($object)) {
1554 $element = explode(';', $curlResult->getContentType());
1555 if (!in_array($element[0], ['application/activity+json', 'application/ld+json', 'application/json'])) {
1556 Logger::debug('Unexpected content-type', ['url' => $url, 'content-type' => $curlResult->getContentType()]);
1559 Logger::notice('Invalid JSON data', ['url' => $url, 'content-type' => $curlResult->getContentType(), 'body' => $body]);
1565 if (!empty($object['attributedTo'])) {
1566 $attributed_to = $object['attributedTo'];
1567 if (is_array($attributed_to)) {
1568 $compacted = JsonLD::compact($object);
1569 $attributed_to = JsonLD::fetchElement($compacted, 'as:attributedTo', '@id');
1571 $signer[] = $attributed_to;
1574 if (!empty($object['actor'])) {
1575 $object_actor = $object['actor'];
1576 } elseif (!empty($attributed_to)) {
1577 $object_actor = $attributed_to;
1583 $signer[] = $object_actor;
1585 if (!empty($child['author'])) {
1586 $actor = $child['author'];
1589 $actor = $object_actor;
1592 $ldobject = JsonLD::compact($object);
1594 $type = JsonLD::fetchElement($ldobject, '@type');
1595 $object_id = JsonLD::fetchElement($ldobject, 'as:object', '@id');
1597 if (!in_array($type, Receiver::CONTENT_TYPES) && !empty($object_id)) {
1598 if (($type == 'as:Announce') && !empty($relay_actor) && ($completion = Receiver::COMPLETION_RELAY)) {
1599 if (Item::searchByLink($object_id)) {
1602 Logger::debug('Fetch announced activity', ['type' => $type, 'id' => $object_id, 'actor' => $relay_actor, 'signer' => $signer]);
1604 return self::fetchMissingActivity($object_id, $child, $relay_actor, $completion, $uid);
1606 $activity = $object;
1607 $ldactivity = $ldobject;
1609 $activity = self::getActivityForObject($object, $actor);
1610 $ldactivity = JsonLD::compact($activity);
1611 $object_id = $object['id'];
1614 $ldactivity['recursion-depth'] = !empty($child['recursion-depth']) ? $child['recursion-depth'] + 1 : 0;
1616 if ($object_actor != $actor) {
1617 Contact::updateByUrlIfNeeded($object_actor);
1620 Contact::updateByUrlIfNeeded($actor);
1622 if (!empty($child['thread-completion'])) {
1623 $ldactivity['thread-completion'] = $child['thread-completion'];
1624 $ldactivity['completion-mode'] = $child['completion-mode'] ?? Receiver::COMPLETION_NONE;
1626 $ldactivity['thread-completion'] = Contact::getIdForURL($relay_actor ?: $actor);
1627 $ldactivity['completion-mode'] = $completion;
1630 if ($completion == Receiver::COMPLETION_RELAY) {
1631 $ldactivity['from-relay'] = $ldactivity['thread-completion'];
1632 if (in_array($type, Receiver::CONTENT_TYPES) && !self::acceptIncomingMessage($ldactivity, $object_id)) {
1637 if (!empty($child['thread-children-type'])) {
1638 $ldactivity['thread-children-type'] = $child['thread-children-type'];
1639 } elseif (!empty($child['type'])) {
1640 $ldactivity['thread-children-type'] = $child['type'];
1642 $ldactivity['thread-children-type'] = 'as:Create';
1645 if (($completion == Receiver::COMPLETION_RELAY) && Queue::exists($url, 'as:Create')) {
1646 Logger::info('Activity has already been queued.', ['url' => $url, 'object' => $activity['id']]);
1647 } elseif (ActivityPub\Receiver::processActivity($ldactivity, json_encode($activity), $uid, true, false, $signer, '', $completion)) {
1648 Logger::info('Activity had been fetched and processed.', ['url' => $url, 'entry' => $child['entry-id'] ?? 0, 'completion' => $completion, 'object' => $activity['id']]);
1650 Logger::info('Activity had been fetched and will be processed later.', ['url' => $url, 'entry' => $child['entry-id'] ?? 0, 'completion' => $completion, 'object' => $activity['id']]);
1653 return $activity['id'];
1656 private static function getActivityForObject(array $object, string $actor): array
1658 if (!empty($object['published'])) {
1659 $published = $object['published'];
1660 } elseif (!empty($child['published'])) {
1661 $published = $child['published'];
1663 $published = DateTimeFormat::utcNow();
1667 $activity['@context'] = $object['@context'] ?? ActivityPub::CONTEXT;
1668 unset($object['@context']);
1669 $activity['id'] = $object['id'];
1670 $activity['to'] = $object['to'] ?? [];
1671 $activity['cc'] = $object['cc'] ?? [];
1672 $activity['audience'] = $object['audience'] ?? [];
1673 $activity['actor'] = $actor;
1674 $activity['object'] = $object;
1675 $activity['published'] = $published;
1676 $activity['type'] = 'Create';
1682 * Test if incoming relay messages should be accepted
1684 * @param array $activity activity array
1685 * @param string $id object ID
1686 * @return boolean true if message is accepted
1688 private static function acceptIncomingMessage(array $activity, string $id): bool
1690 if (empty($activity['as:object'])) {
1691 Logger::info('No object field in activity - accepted', ['id' => $id]);
1695 $replyto = JsonLD::fetchElement($activity['as:object'], 'as:inReplyTo', '@id');
1696 $uriid = ItemURI::getIdByURI($replyto ?? '');
1697 if (Post::exists(['uri-id' => $uriid])) {
1698 Logger::info('Post is a reply to an existing post - accepted', ['id' => $id, 'uri-id' => $uriid, 'replyto' => $replyto]);
1702 $attributed_to = JsonLD::fetchElement($activity['as:object'], 'as:attributedTo', '@id');
1703 $authorid = Contact::getIdForURL($attributed_to);
1705 $content = JsonLD::fetchElement($activity['as:object'], 'as:name', '@value') ?? '';
1706 $content .= ' ' . JsonLD::fetchElement($activity['as:object'], 'as:summary', '@value') ?? '';
1707 $content .= ' ' . HTML::toBBCode(JsonLD::fetchElement($activity['as:object'], 'as:content', '@value') ?? '');
1709 $attachments = JsonLD::fetchElementArray($activity['as:object'], 'as:attachment') ?? [];
1710 foreach ($attachments as $media) {
1711 if (!empty($media['as:summary'])) {
1712 $content .= ' ' . JsonLD::fetchElement($media, 'as:summary', '@value');
1714 if (!empty($media['as:name'])) {
1715 $content .= ' ' . JsonLD::fetchElement($media, 'as:name', '@value');
1720 $tags = Receiver::processTags(JsonLD::fetchElementArray($activity['as:object'], 'as:tag') ?? []);
1721 if (!empty($tags)) {
1722 foreach ($tags as $tag) {
1723 if (($tag['type'] != 'Hashtag') && !strpos($tag['type'], ':Hashtag')) {
1726 $messageTags[] = ltrim(mb_strtolower($tag['name']), '#');
1730 $languages = self::getPostLanguages($activity);
1732 return Relay::isSolicitedPost($messageTags, $content, $authorid, $id, Protocol::ACTIVITYPUB, $activity['thread-completion'] ?? 0, $languages);
1736 * Fetch the post language from the content
1738 * @param array $activity
1741 private static function getPostLanguages(array $activity): array
1743 $content = JsonLD::fetchElement($activity['as:object'], 'as:content') ?? '';
1744 $languages = JsonLD::fetchElementArray($activity['as:object'], 'as:content', '@language') ?? [];
1745 if (empty($languages)) {
1749 $iso639 = new \Matriphe\ISO639\ISO639;
1752 foreach ($languages as $language) {
1753 if ($language == $content) {
1756 $language = DI::l10n()->toISO6391($language);
1757 if (!in_array($language, array_column($iso639->allLanguages(), 0))) {
1760 $result[] = $language;
1766 * perform a "follow" request
1768 * @param array $activity
1770 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1771 * @throws \ImagickException
1773 public static function followUser(array $activity)
1775 $uid = User::getIdForURL($activity['object_id']);
1777 Queue::remove($activity);
1781 $owner = User::getOwnerDataById($uid);
1782 if (empty($owner)) {
1786 $cid = Contact::getIdForURL($activity['actor'], $uid);
1788 self::switchContact($cid);
1789 Contact::update(['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
1793 'author-id' => Contact::getIdForURL($activity['actor']),
1794 'author-link' => $activity['actor'],
1797 // Ensure that the contact has got the right network type
1798 self::switchContact($item['author-id']);
1800 $result = Contact::addRelationship($owner, [], $item, false, $activity['content'] ?? '');
1801 if ($result === true) {
1802 ActivityPub\Transmitter::sendContactAccept($item['author-link'], $activity['id'], $owner['uid']);
1805 $cid = Contact::getIdForURL($activity['actor'], $uid);
1810 if ($result && DI::config()->get('system', 'transmit_pending_events') && ($owner['contact-type'] == Contact::TYPE_COMMUNITY)) {
1811 self::transmitPendingEvents($cid, $owner['uid']);
1814 if (empty($contact)) {
1815 Contact::update(['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
1817 Logger::notice('Follow user ' . $uid . ' from contact ' . $cid . ' with id ' . $activity['id']);
1818 Queue::remove($activity);
1822 * Transmit pending events to the new follower
1824 * @param integer $cid Contact id
1825 * @param integer $uid User id
1828 private static function transmitPendingEvents(int $cid, int $uid)
1830 $account = DBA::selectFirst('account-user-view', ['ap-inbox', 'ap-sharedinbox'], ['id' => $cid]);
1831 $inbox = $account['ap-sharedinbox'] ?: $account['ap-inbox'];
1833 $events = DBA::select('event', ['id'], ["`uid` = ? AND `start` > ? AND `type` != ?", $uid, DateTimeFormat::utcNow(), 'birthday']);
1834 while ($event = DBA::fetch($events)) {
1835 $post = Post::selectFirst(['id', 'uri-id', 'created'], ['event-id' => $event['id']]);
1839 if (DI::config()->get('system', 'bulk_delivery')) {
1840 Post\Delivery::add($post['uri-id'], $uid, $inbox, $post['created'], Delivery::POST, [$cid]);
1841 Worker::add(Worker::PRIORITY_HIGH, 'APDelivery', '', 0, $inbox, 0);
1843 Worker::add(Worker::PRIORITY_HIGH, 'APDelivery', Delivery::POST, $post['id'], $inbox, $uid, [$cid], $post['uri-id']);
1849 * Update the given profile
1851 * @param array $activity
1852 * @throws \Exception
1854 public static function updatePerson(array $activity)
1856 if (empty($activity['object_id'])) {
1860 Logger::info('Updating profile', ['object' => $activity['object_id']]);
1861 Contact::updateFromProbeByURL($activity['object_id']);
1862 Queue::remove($activity);
1866 * Delete the given profile
1868 * @param array $activity
1870 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1872 public static function deletePerson(array $activity)
1874 if (empty($activity['object_id']) || empty($activity['actor'])) {
1875 Logger::info('Empty object id or actor.');
1876 Queue::remove($activity);
1880 if ($activity['object_id'] != $activity['actor']) {
1881 Logger::info('Object id does not match actor.');
1882 Queue::remove($activity);
1886 $contacts = DBA::select('contact', ['id'], ['nurl' => Strings::normaliseLink($activity['object_id'])]);
1887 while ($contact = DBA::fetch($contacts)) {
1888 Contact::remove($contact['id']);
1890 DBA::close($contacts);
1892 Logger::info('Deleted contact', ['object' => $activity['object_id']]);
1893 Queue::remove($activity);
1897 * Add moved contacts as followers for all subscribers of the old contact
1899 * @param array $activity
1901 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1903 public static function movePerson(array $activity)
1905 if (empty($activity['target_id']) || empty($activity['object_id'])) {
1906 Queue::remove($activity);
1910 if ($activity['object_id'] != $activity['actor']) {
1911 Logger::notice('Object is not the actor', ['activity' => $activity]);
1912 Queue::remove($activity);
1916 $from = Contact::getByURL($activity['object_id'], false, ['uri-id']);
1917 if (empty($from['uri-id'])) {
1918 Logger::info('Object not found', ['activity' => $activity]);
1919 Queue::remove($activity);
1923 $contacts = DBA::select('contact', ['uid', 'url'], ["`uri-id` = ? AND `uid` != ? AND `rel` IN (?, ?)", $from['uri-id'], 0, Contact::FRIEND, Contact::SHARING]);
1924 while ($from_contact = DBA::fetch($contacts)) {
1925 $result = Contact::createFromProbeForUser($from_contact['uid'], $activity['target_id']);
1926 Logger::debug('Follower added', ['from' => $from_contact, 'result' => $result]);
1928 DBA::close($contacts);
1929 Queue::remove($activity);
1933 * Blocks the user by the contact
1935 * @param array $activity
1937 * @throws \Exception
1939 public static function blockAccount(array $activity)
1941 $cid = Contact::getIdForURL($activity['actor']);
1946 $uid = User::getIdForURL($activity['object_id']);
1951 Contact\User::setIsBlocked($cid, $uid, true);
1953 Logger::info('Contact blocked user', ['contact' => $cid, 'user' => $uid]);
1954 Queue::remove($activity);
1958 * Unblocks the user by the contact
1960 * @param array $activity
1962 * @throws \Exception
1964 public static function unblockAccount(array $activity)
1966 $cid = Contact::getIdForURL($activity['actor']);
1971 $uid = User::getIdForURL($activity['object_object']);
1976 Contact\User::setIsBlocked($cid, $uid, false);
1978 Logger::info('Contact unblocked user', ['contact' => $cid, 'user' => $uid]);
1979 Queue::remove($activity);
1985 * @param array $activity
1987 * @throws \Exception
1989 public static function ReportAccount(array $activity)
1991 $account = Contact::getByURL($activity['object_id'], null, ['id', 'gsid']);
1992 if (empty($account)) {
1993 Logger::info('Unknown account', ['activity' => $activity]);
1994 Queue::remove($activity);
1998 $reporter_id = Contact::getIdForURL($activity['actor']);
1999 if (empty($reporter_id)) {
2000 Logger::info('Unknown actor', ['activity' => $activity]);
2001 Queue::remove($activity);
2006 foreach ($activity['object_ids'] as $status_id) {
2007 $post = Post::selectFirst(['uri-id'], ['uri' => $status_id]);
2008 if (!empty($post['uri-id'])) {
2009 $uri_ids[] = $post['uri-id'];
2013 $report = DI::reportFactory()->createFromReportsRequest(System::getRules(true), $reporter_id, $account['id'], $account['gsid'], $activity['content'], 'other', false, $uri_ids);
2014 DI::report()->save($report);
2016 Logger::info('Stored report', ['reporter' => $reporter_id, 'account' => $account, 'comment' => $activity['content'], 'object_ids' => $activity['object_ids']]);
2020 * Accept a follow request
2022 * @param array $activity
2023 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2024 * @throws \ImagickException
2026 public static function acceptFollowUser(array $activity)
2028 if (!empty($activity['object_actor'])) {
2029 $uid = User::getIdForURL($activity['object_actor']);
2031 } elseif (!empty($activity['receiver']) && (count($activity['receiver']) == 1)) {
2032 $uid = array_shift($activity['receiver']);
2037 Logger::notice('User could not be detected', ['activity' => $activity]);
2038 Queue::remove($activity);
2042 $cid = Contact::getIdForURL($activity['actor'], $uid);
2044 Logger::notice('No contact found', ['actor' => $activity['actor']]);
2045 Queue::remove($activity);
2049 $id = Transmitter::activityIDFromContact($cid);
2050 if ($id == $activity['object_id']) {
2051 Logger::info('Successful id check', ['uid' => $uid, 'cid' => $cid]);
2053 Logger::info('Unsuccessful id check', ['uid' => $uid, 'cid' => $cid, 'id' => $id, 'object_id' => $activity['object_id']]);
2055 Queue::remove($activity);
2060 self::switchContact($cid);
2062 $fields = ['pending' => false];
2064 $contact = DBA::selectFirst('contact', ['rel'], ['id' => $cid]);
2065 if ($contact['rel'] == Contact::FOLLOWER) {
2066 $fields['rel'] = Contact::FRIEND;
2069 $condition = ['id' => $cid];
2070 Contact::update($fields, $condition);
2071 Logger::info('Accept contact request', ['contact' => $cid, 'user' => $uid]);
2072 Queue::remove($activity);
2076 * Reject a follow request
2078 * @param array $activity
2079 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2080 * @throws \ImagickException
2082 public static function rejectFollowUser(array $activity)
2084 $uid = User::getIdForURL($activity['object_actor']);
2089 $cid = Contact::getIdForURL($activity['actor'], $uid);
2091 Logger::info('No contact found', ['actor' => $activity['actor']]);
2095 self::switchContact($cid);
2097 $contact = Contact::getById($cid, ['rel']);
2098 if ($contact['rel'] == Contact::SHARING) {
2099 Contact::remove($cid);
2100 Logger::info('Rejected contact request - contact removed', ['contact' => $cid, 'user' => $uid]);
2101 } elseif ($contact['rel'] == Contact::FRIEND) {
2102 Contact::update(['rel' => Contact::FOLLOWER], ['id' => $cid]);
2104 Logger::info('Rejected contact request', ['contact' => $cid, 'user' => $uid]);
2106 Queue::remove($activity);
2110 * Undo activity like "like" or "dislike"
2112 * @param array $activity
2113 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2114 * @throws \ImagickException
2116 public static function undoActivity(array $activity)
2118 if (empty($activity['object_id'])) {
2122 if (empty($activity['object_actor'])) {
2126 $author_id = Contact::getIdForURL($activity['object_actor']);
2127 if (empty($author_id)) {
2131 Item::markForDeletion(['uri' => $activity['object_id'], 'author-id' => $author_id, 'gravity' => Item::GRAVITY_ACTIVITY]);
2132 Queue::remove($activity);
2136 * Activity to remove a follower
2138 * @param array $activity
2139 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2140 * @throws \ImagickException
2142 public static function undoFollowUser(array $activity)
2144 $uid = User::getIdForURL($activity['object_object']);
2149 $owner = User::getOwnerDataById($uid);
2150 if (empty($owner)) {
2154 $cid = Contact::getIdForURL($activity['actor'], $uid);
2156 Logger::info('No contact found', ['actor' => $activity['actor']]);
2160 self::switchContact($cid);
2162 $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
2163 if (!DBA::isResult($contact)) {
2167 Contact::removeFollower($contact);
2168 Logger::info('Undo following request', ['contact' => $cid, 'user' => $uid]);
2169 Queue::remove($activity);
2173 * Switches a contact to AP if needed
2175 * @param integer $cid Contact ID
2177 * @throws \Exception
2179 private static function switchContact(int $cid)
2181 $contact = DBA::selectFirst('contact', ['network', 'url'], ['id' => $cid]);
2182 if (!DBA::isResult($contact) || in_array($contact['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN]) || Contact::isLocal($contact['url'])) {
2186 Logger::info('Change existing contact', ['cid' => $cid, 'previous' => $contact['network']]);
2187 Contact::updateFromProbe($cid);
2191 * Collects implicit mentions like:
2192 * - the author of the parent item
2193 * - all the mentioned conversants in the parent item
2195 * @param array $parent Item array with at least ['id', 'author-link', 'alias']
2197 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2199 private static function getImplicitMentionList(array $parent): array
2201 $parent_terms = Tag::getByURIId($parent['uri-id'], [Tag::MENTION, Tag::IMPLICIT_MENTION, Tag::EXCLUSIVE_MENTION]);
2203 $parent_author = Contact::getByURL($parent['author-link'], false, ['url', 'nurl', 'alias']);
2205 $implicit_mentions = [];
2206 if (empty($parent_author['url'])) {
2207 Logger::notice('Author public contact unknown.', ['author-link' => $parent['author-link'], 'parent-id' => $parent['id']]);
2209 $implicit_mentions[] = $parent_author['url'];
2210 $implicit_mentions[] = $parent_author['nurl'];
2211 $implicit_mentions[] = $parent_author['alias'];
2214 if (!empty($parent['alias'])) {
2215 $implicit_mentions[] = $parent['alias'];
2218 foreach ($parent_terms as $term) {
2219 $contact = Contact::getByURL($term['url'], false, ['url', 'nurl', 'alias']);
2220 if (!empty($contact['url'])) {
2221 $implicit_mentions[] = $contact['url'];
2222 $implicit_mentions[] = $contact['nurl'];
2223 $implicit_mentions[] = $contact['alias'];
2227 return $implicit_mentions;
2231 * Strips from the body prepended implicit mentions
2233 * @param string $body
2234 * @param array $parent
2237 private static function removeImplicitMentionsFromBody(string $body, array $parent): string
2239 if (DI::config()->get('system', 'disable_implicit_mentions')) {
2243 $potential_mentions = self::getImplicitMentionList($parent);
2245 $kept_mentions = [];
2247 // Extract one prepended mention at a time from the body
2248 while(preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $body, $matches)) {
2249 if (!in_array($matches[2], $potential_mentions)) {
2250 $kept_mentions[] = $matches[1];
2253 $body = $matches[3];
2256 // Re-appending the kept mentions to the body after extraction
2257 $kept_mentions[] = $body;
2259 return implode('', $kept_mentions);
2263 * Adds links to string mentions
2265 * @param string $body
2266 * @param array $tags
2269 protected static function addMentionLinks(string $body, array $tags): string
2271 // This prevents links to be added again to Pleroma-style mention links
2272 $body = self::normalizeMentionLinks($body);
2274 $body = BBCode::performWithEscapedTags($body, ['url'], function ($body) use ($tags) {
2275 foreach ($tags as $tag) {
2276 if (empty($tag['name']) || empty($tag['type']) || empty($tag['href']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
2280 $hash = substr($tag['name'], 0, 1);
2281 $name = substr($tag['name'], 1);
2282 if (!in_array($hash, Tag::TAG_CHARACTER)) {
2284 $name = $tag['name'];
2287 if (Network::isValidHttpUrl($tag['href'])) {
2288 $body = str_replace($tag['name'], $hash . '[url=' . $tag['href'] . ']' . $name . '[/url]', $body);