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\Logger;
28 use Friendica\Core\Protocol;
29 use Friendica\Core\System;
30 use Friendica\Core\Worker;
31 use Friendica\Database\DBA;
33 use Friendica\Model\APContact;
34 use Friendica\Model\Contact;
35 use Friendica\Model\Conversation;
36 use Friendica\Model\Event;
37 use Friendica\Model\GServer;
38 use Friendica\Model\Item;
39 use Friendica\Model\ItemURI;
40 use Friendica\Model\Mail;
41 use Friendica\Model\Tag;
42 use Friendica\Model\User;
43 use Friendica\Model\Post;
44 use Friendica\Protocol\Activity;
45 use Friendica\Protocol\ActivityPub;
46 use Friendica\Protocol\Relay;
47 use Friendica\Util\DateTimeFormat;
48 use Friendica\Util\JsonLD;
49 use Friendica\Util\Strings;
50 use Friendica\Worker\Delivery;
53 * ActivityPub Processor Protocol class
58 * Extracts the tag character (#, @, !) from mention links
63 protected static function normalizeMentionLinks(string $body): string
65 return preg_replace('%\[url=([^\[\]]*)]([#@!])(.*?)\[/url]%ism', '$2[url=$1]$3[/url]', $body);
69 * Convert the language array into a language JSON
71 * @param array $languages
72 * @return string language JSON
74 private static function processLanguages(array $languages): string
76 $codes = array_keys($languages);
78 foreach ($codes as $code) {
86 return json_encode($lang);
89 * Replaces emojis in the body
93 * @param array $emojis
95 * @return string with replaced emojis
97 private static function replaceEmojis(int $uri_id, string $body, array $emojis): string
101 array_column($emojis, 'name'),
102 array_map(function ($emoji) {
103 return '[emoji=' . $emoji['href'] . ']' . $emoji['name'] . '[/emoji]';
108 // We store the emoji here to be able to avoid storing it in the media
109 foreach ($emojis as $emoji) {
110 Post\Link::getByLink($uri_id, $emoji['href']);
116 * Store attached media files in the post-media table
119 * @param array $attachment
122 private static function storeAttachmentAsMedia(int $uriid, array $attachment)
124 if (empty($attachment['url'])) {
128 $data = ['uri-id' => $uriid];
129 $data['type'] = Post\Media::UNKNOWN;
130 $data['url'] = $attachment['url'];
131 $data['mimetype'] = $attachment['mediaType'] ?? null;
132 $data['height'] = $attachment['height'] ?? null;
133 $data['width'] = $attachment['width'] ?? null;
134 $data['size'] = $attachment['size'] ?? null;
135 $data['preview'] = $attachment['image'] ?? null;
136 $data['description'] = $attachment['name'] ?? null;
138 Post\Media::insert($data);
142 * Stire attachment data
144 * @param array $activity
147 private static function storeAttachments(array $activity, array $item)
149 if (empty($activity['attachments'])) {
153 foreach ($activity['attachments'] as $attach) {
154 self::storeAttachmentAsMedia($item['uri-id'], $attach);
159 * Store attachment data
161 * @param array $activity
164 private static function storeQuestion(array $activity, array $item)
166 if (empty($activity['question'])) {
169 $question = ['multiple' => $activity['question']['multiple']];
171 if (!empty($activity['question']['voters'])) {
172 $question['voters'] = $activity['question']['voters'];
175 if (!empty($activity['question']['end-time'])) {
176 $question['end-time'] = DateTimeFormat::utc($activity['question']['end-time']);
179 Post\Question::update($item['uri-id'], $question);
181 foreach ($activity['question']['options'] as $key => $option) {
182 $option = ['name' => $option['name'], 'replies' => $option['replies']];
183 Post\QuestionOption::update($item['uri-id'], $key, $option);
186 Logger::debug('Storing incoming question', ['type' => $activity['type'], 'uri-id' => $item['uri-id'], 'question' => $activity['question']]);
192 * @param FetchQueue $fetchQueue
193 * @param array $activity Activity array
194 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
195 * @throws \ImagickException
197 public static function updateItem(FetchQueue $fetchQueue, array $activity)
199 $item = Post::selectFirst(['uri', 'uri-id', 'thr-parent', 'gravity', 'post-type'], ['uri' => $activity['id']]);
200 if (!DBA::isResult($item)) {
201 Logger::warning('No existing item, item will be created', ['uri' => $activity['id']]);
202 $item = self::createItem($fetchQueue, $activity);
207 self::postItem($activity, $item);
211 $item['changed'] = DateTimeFormat::utcNow();
212 $item['edited'] = DateTimeFormat::utc($activity['updated']);
214 $item = self::processContent($activity, $item);
216 self::storeAttachments($activity, $item);
217 self::storeQuestion($activity, $item);
223 Post\History::add($item['uri-id'], $item);
224 Item::update($item, ['uri' => $activity['id']]);
226 if ($activity['object_type'] == 'as:Event') {
227 $posts = Post::select(['event-id', 'uid'], ["`uri` = ? AND `event-id` > ?", $activity['id'], 0]);
228 while ($post = DBA::fetch($posts)) {
229 self::updateEvent($post['event-id'], $activity);
235 * Update an existing event
237 * @param int $event_id
238 * @param array $activity
240 private static function updateEvent(int $event_id, array $activity)
242 $event = DBA::selectFirst('event', [], ['id' => $event_id]);
244 $event['edited'] = DateTimeFormat::utc($activity['updated']);
245 $event['summary'] = HTML::toBBCode($activity['name']);
246 $event['desc'] = HTML::toBBCode($activity['content']);
247 if (!empty($activity['start-time'])) {
248 $event['start'] = DateTimeFormat::utc($activity['start-time']);
250 if (!empty($activity['end-time'])) {
251 $event['finish'] = DateTimeFormat::utc($activity['end-time']);
253 $event['nofinish'] = empty($event['finish']);
254 $event['location'] = $activity['location'];
256 Logger::info('Updating event', ['uri' => $activity['id'], 'id' => $event_id]);
257 Event::store($event);
261 * Prepares data for a message
263 * @param FetchQueue $fetchQueue
264 * @param array $activity Activity array
265 * @return array Internal item
266 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
267 * @throws \ImagickException
269 public static function createItem(FetchQueue $fetchQueue, array $activity): array
272 $item['verb'] = Activity::POST;
273 $item['thr-parent'] = $activity['reply-to-id'];
275 if ($activity['reply-to-id'] == $activity['id']) {
276 $item['gravity'] = GRAVITY_PARENT;
277 $item['object-type'] = Activity\ObjectType::NOTE;
279 $item['gravity'] = GRAVITY_COMMENT;
280 $item['object-type'] = Activity\ObjectType::COMMENT;
283 if (empty($activity['directmessage']) && ($activity['id'] != $activity['reply-to-id']) && !Post::exists(['uri' => $activity['reply-to-id']])) {
284 Logger::notice('Parent not found. Try to refetch it.', ['parent' => $activity['reply-to-id']]);
286 * Instead of calling recursively self::fetchMissingActivity which can hit PHP's default function nesting
287 * limit of 256 recursive calls, we push the parent activity fetch parameters in this queue. The initial
288 * caller is responsible for processing the remaining queue once the original activity has been processed.
290 $fetchQueue->push(new FetchQueueItem($activity['reply-to-id'], $activity));
293 $item['diaspora_signed_text'] = $activity['diaspora:comment'] ?? '';
295 /// @todo What to do with $activity['context']?
296 if (empty($activity['directmessage']) && ($item['gravity'] != GRAVITY_PARENT) && !Post::exists(['uri' => $item['thr-parent']])) {
297 Logger::info('Parent not found, message will be discarded.', ['thr-parent' => $item['thr-parent']]);
301 $item['network'] = Protocol::ACTIVITYPUB;
302 $item['author-link'] = $activity['author'];
303 $item['author-id'] = Contact::getIdForURL($activity['author']);
304 $item['owner-link'] = $activity['actor'];
305 $item['owner-id'] = Contact::getIdForURL($activity['actor']);
307 if (in_array(0, $activity['receiver']) && !empty($activity['unlisted'])) {
308 $item['private'] = Item::UNLISTED;
309 } elseif (in_array(0, $activity['receiver'])) {
310 $item['private'] = Item::PUBLIC;
312 $item['private'] = Item::PRIVATE;
315 if (!empty($activity['raw'])) {
316 $item['source'] = $activity['raw'];
317 $item['protocol'] = Conversation::PARCEL_ACTIVITYPUB;
318 $item['conversation-href'] = $activity['context'] ?? '';
319 $item['conversation-uri'] = $activity['conversation'] ?? '';
321 if (isset($activity['push'])) {
322 $item['direction'] = $activity['push'] ? Conversation::PUSH : Conversation::PULL;
326 if (!empty($activity['from-relay'])) {
327 $item['direction'] = Conversation::RELAY;
330 if ($activity['object_type'] == 'as:Article') {
331 $item['post-type'] = Item::PT_ARTICLE;
332 } elseif ($activity['object_type'] == 'as:Audio') {
333 $item['post-type'] = Item::PT_AUDIO;
334 } elseif ($activity['object_type'] == 'as:Document') {
335 $item['post-type'] = Item::PT_DOCUMENT;
336 } elseif ($activity['object_type'] == 'as:Event') {
337 $item['post-type'] = Item::PT_EVENT;
338 } elseif ($activity['object_type'] == 'as:Image') {
339 $item['post-type'] = Item::PT_IMAGE;
340 } elseif ($activity['object_type'] == 'as:Page') {
341 $item['post-type'] = Item::PT_PAGE;
342 } elseif ($activity['object_type'] == 'as:Question') {
343 $item['post-type'] = Item::PT_POLL;
344 } elseif ($activity['object_type'] == 'as:Video') {
345 $item['post-type'] = Item::PT_VIDEO;
347 $item['post-type'] = Item::PT_NOTE;
350 $item['isForum'] = false;
352 if (!empty($activity['thread-completion'])) {
353 if ($activity['thread-completion'] != $item['owner-id']) {
354 $actor = Contact::getById($activity['thread-completion'], ['url']);
355 $item['causer-link'] = $actor['url'];
356 $item['causer-id'] = $activity['thread-completion'];
357 Logger::info('Use inherited actor as causer.', ['id' => $item['owner-id'], 'activity' => $activity['thread-completion'], 'owner' => $item['owner-link'], 'actor' => $actor['url']]);
359 // Store the original actor in the "causer" fields to enable the check for ignored or blocked contacts
360 $item['causer-link'] = $item['owner-link'];
361 $item['causer-id'] = $item['owner-id'];
362 Logger::info('Use actor as causer.', ['id' => $item['owner-id'], 'actor' => $item['owner-link']]);
365 $item['owner-link'] = $item['author-link'];
366 $item['owner-id'] = $item['author-id'];
368 $actor = APContact::getByURL($item['owner-link'], false);
369 $item['isForum'] = ($actor['type'] == 'Group');
372 $item['uri'] = $activity['id'];
374 if (empty($activity['published']) || empty($activity['updated'])) {
375 DI::logger()->notice('published or updated keys are empty for activity', ['activity' => $activity, 'callstack' => System::callstack(10)]);
378 $item['created'] = DateTimeFormat::utc($activity['published'] ?? 'now');
379 $item['edited'] = DateTimeFormat::utc($activity['updated'] ?? 'now');
380 $guid = $activity['sc:identifier'] ?: self::getGUIDByURL($item['uri']);
381 $item['guid'] = $activity['diaspora:guid'] ?: $guid;
383 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
384 if (empty($item['uri-id'])) {
385 Logger::warning('Unable to get a uri-id for an item uri', ['uri' => $item['uri'], 'guid' => $item['guid']]);
389 $item = self::processContent($activity, $item);
391 Logger::info('Message was not processed');
395 $item['plink'] = $activity['alternate-url'] ?? $item['uri'];
397 self::storeAttachments($activity, $item);
398 self::storeQuestion($activity, $item);
400 // We received the post via AP, so we set the protocol of the server to AP
401 $contact = Contact::getById($item['author-id'], ['gsid']);
402 if (!empty($contact['gsid'])) {
403 GServer::setProtocol($contact['gsid'], Post\DeliveryData::ACTIVITYPUB);
406 if ($item['author-id'] != $item['owner-id']) {
407 $contact = Contact::getById($item['owner-id'], ['gsid']);
408 if (!empty($contact['gsid'])) {
409 GServer::setProtocol($contact['gsid'], Post\DeliveryData::ACTIVITYPUB);
419 * @param array $activity
420 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
421 * @throws \ImagickException
423 public static function deleteItem(array $activity)
425 $owner = Contact::getIdForURL($activity['actor']);
427 Logger::info('Deleting item', ['object' => $activity['object_id'], 'owner' => $owner]);
428 Item::markForDeletion(['uri' => $activity['object_id'], 'owner-id' => $owner]);
432 * Prepare the item array for an activity
434 * @param array $activity Activity array
435 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
436 * @throws \ImagickException
438 public static function addTag(array $activity)
440 if (empty($activity['object_content']) || empty($activity['object_id'])) {
444 foreach ($activity['receiver'] as $receiver) {
445 $item = Post::selectFirst(['id', 'uri-id', 'origin', 'author-link'], ['uri' => $activity['target_id'], 'uid' => $receiver]);
446 if (!DBA::isResult($item)) {
447 // We don't fetch missing content for this purpose
451 if (($item['author-link'] != $activity['actor']) && !$item['origin']) {
452 Logger::info('Not origin, not from the author, skipping update', ['id' => $item['id'], 'author' => $item['author-link'], 'actor' => $activity['actor']]);
456 Tag::store($item['uri-id'], Tag::HASHTAG, $activity['object_content'], $activity['object_id']);
457 Logger::info('Tagged item', ['id' => $item['id'], 'tag' => $activity['object_content'], 'uri' => $activity['target_id'], 'actor' => $activity['actor']]);
462 * Prepare the item array for an activity
464 * @param FetchQueue $fetchQueue
465 * @param array $activity Activity array
466 * @param string $verb Activity verb
467 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
468 * @throws \ImagickException
470 public static function createActivity(FetchQueue $fetchQueue, array $activity, string $verb)
472 $item = self::createItem($fetchQueue, $activity);
477 $item['verb'] = $verb;
478 $item['thr-parent'] = $activity['object_id'];
479 $item['gravity'] = GRAVITY_ACTIVITY;
480 unset($item['post-type']);
481 $item['object-type'] = Activity\ObjectType::NOTE;
483 if (!empty($activity['content'])) {
484 $item['body'] = HTML::toBBCode($activity['content']);
487 $item['diaspora_signed_text'] = $activity['diaspora:like'] ?? '';
489 self::postItem($activity, $item);
493 * Fetch the Uri-Id of a post for the "featured" collection
495 * @param array $activity
498 private static function getUriIdForFeaturedCollection(array $activity)
500 $actor = APContact::getByURL($activity['actor']);
505 // Refetch the account when the "featured" collection is missing.
506 // This can be removed in a future version (end of 2022 should be good).
507 if (empty($actor['featured'])) {
508 $actor = APContact::getByURL($activity['actor'], true);
514 if ($activity['target_id'] != $actor['featured']) {
518 $id = Contact::getIdForURL($activity['actor']);
523 $parent = Post::selectFirst(['uri-id'], ['uri' => $activity['object_id'], 'author-id' => $id]);
524 if (!empty($parent['uri-id'])) {
525 return $parent['uri-id'];
532 * Add a post to the "Featured" collection
534 * @param array $activity
536 public static function addToFeaturedCollection(array $activity)
538 $uriid = self::getUriIdForFeaturedCollection($activity);
543 Logger::debug('Add post to featured collection', ['uri-id' => $uriid]);
545 Post\Collection::add($uriid, Post\Collection::FEATURED);
549 * Remove a post to the "Featured" collection
551 * @param array $activity
553 public static function removeFromFeaturedCollection(array $activity)
555 $uriid = self::getUriIdForFeaturedCollection($activity);
560 Logger::debug('Remove post from featured collection', ['uri-id' => $uriid]);
562 Post\Collection::remove($uriid, Post\Collection::FEATURED);
568 * @param array $activity Activity array
571 * @return int event id
574 public static function createEvent(array $activity, array $item): int
576 $event['summary'] = HTML::toBBCode($activity['name'] ?: $activity['summary']);
577 $event['desc'] = HTML::toBBCode($activity['content']);
578 if (!empty($activity['start-time'])) {
579 $event['start'] = DateTimeFormat::utc($activity['start-time']);
581 if (!empty($activity['end-time'])) {
582 $event['finish'] = DateTimeFormat::utc($activity['end-time']);
584 $event['nofinish'] = empty($event['finish']);
585 $event['location'] = $activity['location'];
586 $event['cid'] = $item['contact-id'];
587 $event['uid'] = $item['uid'];
588 $event['uri'] = $item['uri'];
589 $event['edited'] = $item['edited'];
590 $event['private'] = $item['private'];
591 $event['guid'] = $item['guid'];
592 $event['plink'] = $item['plink'];
593 $event['network'] = $item['network'];
594 $event['protocol'] = $item['protocol'];
595 $event['direction'] = $item['direction'];
596 $event['source'] = $item['source'];
598 $ev = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
599 if (DBA::isResult($ev)) {
600 $event['id'] = $ev['id'];
603 $event_id = Event::store($event);
605 Logger::info('Event was stored', ['id' => $event_id]);
611 * Process the content
613 * @param array $activity Activity array
615 * @return array|bool Returns the item array or false if there was an unexpected occurrence
618 private static function processContent(array $activity, array $item)
620 if (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/markdown')) {
621 $item['title'] = strip_tags($activity['name']);
622 $content = Markdown::toBBCode($activity['content']);
623 } elseif (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/bbcode')) {
624 $item['title'] = $activity['name'];
625 $content = $activity['content'];
627 // By default assume "text/html"
628 $item['title'] = HTML::toBBCode($activity['name'] ?? '');
629 $content = HTML::toBBCode($activity['content'] ?? '');
632 $item['title'] = trim(BBCode::toPlaintext($item['title']));
634 if (!empty($activity['languages'])) {
635 $item['language'] = self::processLanguages($activity['languages']);
638 if (!empty($activity['emojis'])) {
639 $content = self::replaceEmojis($item['uri-id'], $content, $activity['emojis']);
642 $content = self::addMentionLinks($content, $activity['tags']);
644 if (!empty($activity['source'])) {
645 $item['body'] = $activity['source'];
646 $item['raw-body'] = $content;
647 $item['body'] = Item::improveSharedDataInBody($item);
649 if (empty($activity['directmessage']) && ($item['thr-parent'] != $item['uri']) && ($item['gravity'] == GRAVITY_COMMENT)) {
650 $item_private = !in_array(0, $activity['item_receiver']);
651 $parent = Post::selectFirst(['id', 'uri-id', 'private', 'author-link', 'alias'], ['uri' => $item['thr-parent']]);
652 if (!DBA::isResult($parent)) {
653 Logger::warning('Unknown parent item.', ['uri' => $item['thr-parent']]);
656 if ($item_private && ($parent['private'] != Item::PRIVATE)) {
657 Logger::warning('Item is private but the parent is not. Dropping.', ['item-uri' => $item['uri'], 'thr-parent' => $item['thr-parent']]);
661 $content = self::removeImplicitMentionsFromBody($content, $parent);
663 $item['content-warning'] = HTML::toBBCode($activity['summary'] ?? '');
664 $item['raw-body'] = $item['body'] = $content;
667 self::storeFromBody($item);
668 self::storeTags($item['uri-id'], $activity['tags']);
670 self::storeReceivers($item['uri-id'], $activity['receiver_urls'] ?? []);
672 $item['location'] = $activity['location'];
674 if (!empty($activity['latitude']) && !empty($activity['longitude'])) {
675 $item['coord'] = $activity['latitude'] . ' ' . $activity['longitude'];
678 $item['app'] = $activity['generator'];
684 * Store hashtags and mentions
688 private static function storeFromBody(array $item)
690 // Make sure to delete all existing tags (can happen when called via the update functionality)
691 DBA::delete('post-tag', ['uri-id' => $item['uri-id']]);
693 Tag::storeFromBody($item['uri-id'], $item['body'], '@!');
697 * Generate a GUID out of an URL of an ActivityPub post.
699 * @param string $url message URL
700 * @return string with GUID
702 private static function getGUIDByURL(string $url): string
704 $parsed = parse_url($url);
706 $host_hash = hash('crc32', $parsed['host']);
708 unset($parsed["scheme"]);
709 unset($parsed["host"]);
711 $path = implode("/", $parsed);
713 return $host_hash . '-'. hash('fnv164', $path) . '-'. hash('joaat', $path);
717 * Checks if an incoming message is wanted
719 * @param array $activity
721 * @return boolean Is the message wanted?
723 private static function isSolicitedMessage(array $activity, array $item): bool
725 // The checks are split to improve the support when searching why a message was accepted.
726 if (count($activity['receiver']) != 1) {
727 // The message has more than one receiver, so it is wanted.
728 Logger::debug('Message has got several receivers - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
732 if ($item['private'] == Item::PRIVATE) {
733 // We only look at public posts here. Private posts are expected to be intentionally posted to the single receiver.
734 Logger::debug('Message is private - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
738 if (!empty($activity['from-relay'])) {
739 // We check relay posts at another place. When it arrived here, the message is already checked.
740 Logger::debug('Message is a relay post that is already checked - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
744 if (in_array($activity['completion-mode'] ?? Receiver::COMPLETION_NONE, [Receiver::COMPLETION_MANUAL, Receiver::COMPLETION_ANNOUCE])) {
745 // Manual completions and completions caused by reshares are allowed without any further checks.
746 Logger::debug('Message is in completion mode - accepted', ['mode' => $activity['completion-mode'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
750 if ($item['gravity'] != GRAVITY_PARENT) {
751 // We cannot reliably check at this point if a comment or activity belongs to an accepted post or needs to be fetched
752 // This can possibly be improved in the future.
753 Logger::debug('Message is no parent - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
757 $tags = array_column(Tag::getByURIId($item['uri-id'], [Tag::HASHTAG]), 'name');
758 if (Relay::isSolicitedPost($tags, $item['body'], $item['author-id'], $item['uri'], Protocol::ACTIVITYPUB)) {
759 Logger::debug('Post is accepted because of the relay settings', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
767 * Creates an item post
769 * @param array $activity Activity data
770 * @param array $item item array
771 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
772 * @throws \ImagickException
774 public static function postItem(array $activity, array $item)
781 ksort($activity['receiver']);
783 if (!self::isSolicitedMessage($activity, $item)) {
784 DBA::delete('item-uri', ['id' => $item['uri-id']]);
788 foreach ($activity['receiver'] as $receiver) {
789 if ($receiver == -1) {
793 $item['uid'] = $receiver;
795 $type = $activity['reception_type'][$receiver] ?? Receiver::TARGET_UNKNOWN;
797 case Receiver::TARGET_TO:
798 $item['post-reason'] = Item::PR_TO;
800 case Receiver::TARGET_CC:
801 $item['post-reason'] = Item::PR_CC;
803 case Receiver::TARGET_BTO:
804 $item['post-reason'] = Item::PR_BTO;
806 case Receiver::TARGET_BCC:
807 $item['post-reason'] = Item::PR_BCC;
809 case Receiver::TARGET_FOLLOWER:
810 $item['post-reason'] = Item::PR_FOLLOWER;
812 case Receiver::TARGET_ANSWER:
813 $item['post-reason'] = Item::PR_COMMENT;
815 case Receiver::TARGET_GLOBAL:
816 $item['post-reason'] = Item::PR_GLOBAL;
819 $item['post-reason'] = Item::PR_NONE;
822 if (!empty($activity['from-relay'])) {
823 $item['post-reason'] = Item::PR_RELAY;
824 } elseif (!empty($activity['thread-completion'])) {
825 $item['post-reason'] = Item::PR_FETCHED;
828 if ($item['isForum'] ?? false) {
829 $item['contact-id'] = Contact::getIdForURL($activity['actor'], $receiver);
831 $item['contact-id'] = Contact::getIdForURL($activity['author'], $receiver);
834 if (($receiver != 0) && empty($item['contact-id'])) {
835 $item['contact-id'] = Contact::getIdForURL($activity['author']);
838 if (!empty($activity['directmessage'])) {
839 self::postMail($activity, $item);
843 if (!($item['isForum'] ?? false) && ($receiver != 0) && ($item['gravity'] == GRAVITY_PARENT) && !Contact::isSharingByURL($activity['author'], $receiver)) {
844 if ($item['post-reason'] == Item::PR_BCC) {
845 Logger::info('Top level post via BCC from a non sharer, ignoring', ['uid' => $receiver, 'contact' => $item['contact-id']]);
850 !empty($activity['thread-children-type'])
851 && in_array($activity['thread-children-type'], Receiver::ACTIVITY_TYPES)
852 && DI::pConfig()->get($receiver, 'system', 'accept_only_sharer') != Item::COMPLETION_LIKE
854 Logger::info('Top level post from thread completion from a non sharer had been initiated via an activity, ignoring',
855 ['type' => $activity['thread-children-type'], 'user' => $item['uid'], 'causer' => $item['causer-link'], 'author' => $activity['author'], 'url' => $item['uri']]);
862 if ($receiver != 0) {
863 $user = User::getById($receiver, ['account-type']);
864 if (!empty($user['account-type'])) {
865 $is_forum = ($user['account-type'] == User::ACCOUNT_TYPE_COMMUNITY);
869 if (!$is_forum && DI::pConfig()->get($receiver, 'system', 'accept_only_sharer') == Item::COMPLETION_NONE && ($receiver != 0) && ($item['gravity'] == GRAVITY_PARENT)) {
870 $skip = !Contact::isSharingByURL($activity['author'], $receiver);
872 if ($skip && (($activity['type'] == 'as:Announce') || ($item['isForum'] ?? false))) {
873 $skip = !Contact::isSharingByURL($activity['actor'], $receiver);
877 Logger::info('Skipping post', ['uid' => $receiver, 'url' => $item['uri']]);
881 Logger::info('Accepting post', ['uid' => $receiver, 'url' => $item['uri']]);
884 if (($item['gravity'] != GRAVITY_ACTIVITY) && ($activity['object_type'] == 'as:Event')) {
885 $event_id = self::createEvent($activity, $item);
887 $item = Event::getItemArrayForImportedId($event_id, $item);
890 $item_id = Item::insert($item);
892 Logger::info('Item insertion successful', ['user' => $item['uid'], 'item_id' => $item_id]);
894 Logger::notice('Item insertion aborted', ['user' => $item['uid']]);
897 if ($item['uid'] == 0) {
902 // Store send a follow request for every reshare - but only when the item had been stored
903 if ($stored && ($item['private'] != Item::PRIVATE) && ($item['gravity'] == GRAVITY_PARENT) && ($item['author-link'] != $item['owner-link'])) {
904 $author = APContact::getByURL($item['owner-link'], false);
905 // We send automatic follow requests for reshared messages. (We don't need though for forum posts)
906 if ($author['type'] != 'Group') {
907 Logger::info('Send follow request', ['uri' => $item['uri'], 'stored' => $stored, 'to' => $item['author-link']]);
908 ActivityPub\Transmitter::sendFollowObject($item['uri'], $item['author-link']);
914 * Store tags and mentions into the tag table
916 * @param integer $uriid
919 private static function storeTags(int $uriid, array $tags = null)
921 foreach ($tags as $tag) {
922 if (empty($tag['name']) || empty($tag['type']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
926 $hash = substr($tag['name'], 0, 1);
928 if ($tag['type'] == 'Mention') {
929 if (in_array($hash, [Tag::TAG_CHARACTER[Tag::MENTION],
930 Tag::TAG_CHARACTER[Tag::EXCLUSIVE_MENTION],
931 Tag::TAG_CHARACTER[Tag::IMPLICIT_MENTION]])) {
932 $tag['name'] = substr($tag['name'], 1);
934 $type = Tag::IMPLICIT_MENTION;
936 if (!empty($tag['href'])) {
937 $apcontact = APContact::getByURL($tag['href']);
938 if (!empty($apcontact['name']) || !empty($apcontact['nick'])) {
939 $tag['name'] = $apcontact['name'] ?: $apcontact['nick'];
942 } elseif ($tag['type'] == 'Hashtag') {
943 if ($hash == Tag::TAG_CHARACTER[Tag::HASHTAG]) {
944 $tag['name'] = substr($tag['name'], 1);
946 $type = Tag::HASHTAG;
949 if (empty($tag['name'])) {
953 Tag::store($uriid, $type, $tag['name'], $tag['href']);
957 public static function storeReceivers(int $uriid, array $receivers)
959 foreach (['as:to' => Tag::TO, 'as:cc' => Tag::CC, 'as:bto' => Tag::BTO, 'as:bcc' => Tag::BCC] as $element => $type) {
960 if (!empty($receivers[$element])) {
961 foreach ($receivers[$element] as $receiver) {
962 if ($receiver == ActivityPub::PUBLIC_COLLECTION) {
963 $name = Receiver::PUBLIC_COLLECTION;
965 $name = trim(parse_url($receiver, PHP_URL_PATH), '/');
968 $target = Tag::getTargetType($receiver);
969 Logger::debug('Got target type', ['type' => $target, 'url' => $receiver]);
970 Tag::store($uriid, $type, $name, $receiver, $target);
977 * Creates an mail post
979 * @param array $activity Activity data
980 * @param array $item item array
981 * @return int|bool New mail table row id or false on error
982 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
984 private static function postMail(array $activity, array $item)
986 if (($item['gravity'] != GRAVITY_PARENT) && !DBA::exists('mail', ['uri' => $item['thr-parent'], 'uid' => $item['uid']])) {
987 Logger::info('Parent not found, mail will be discarded.', ['uid' => $item['uid'], 'uri' => $item['thr-parent']]);
991 Logger::info('Direct Message', $item);
994 $msg['uid'] = $item['uid'];
996 $msg['contact-id'] = $item['contact-id'];
998 $contact = Contact::getById($item['contact-id'], ['name', 'url', 'photo']);
999 $msg['from-name'] = $contact['name'];
1000 $msg['from-url'] = $contact['url'];
1001 $msg['from-photo'] = $contact['photo'];
1003 $msg['uri'] = $item['uri'];
1004 $msg['created'] = $item['created'];
1006 $parent = DBA::selectFirst('mail', ['parent-uri', 'title'], ['uri' => $item['thr-parent']]);
1007 if (DBA::isResult($parent)) {
1008 $msg['parent-uri'] = $parent['parent-uri'];
1009 $msg['title'] = $parent['title'];
1011 $msg['parent-uri'] = $item['thr-parent'];
1013 if (!empty($item['title'])) {
1014 $msg['title'] = $item['title'];
1015 } elseif (!empty($item['content-warning'])) {
1016 $msg['title'] = $item['content-warning'];
1018 // Trying to generate a title out of the body
1019 $title = $item['body'];
1021 while (preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $title, $matches)) {
1022 $title = $matches[3];
1025 $title = trim(BBCode::toPlaintext($title));
1027 if (strlen($title) > 20) {
1028 $title = substr($title, 0, 20) . '...';
1031 $msg['title'] = $title;
1034 $msg['body'] = $item['body'];
1036 return Mail::insert($msg);
1040 * Fetch featured posts from a contact with the given url
1042 * @param string $url
1045 public static function fetchFeaturedPosts(string $url)
1047 Logger::info('Fetch featured posts', ['contact' => $url]);
1049 $apcontact = APContact::getByURL($url);
1050 if (empty($apcontact['featured'])) {
1051 Logger::info('Contact does not have a featured collection', ['contact' => $url]);
1055 $pcid = Contact::getIdForURL($url, 0, false);
1057 Logger::info('Contact not found', ['contact' => $url]);
1061 $posts = Post\Collection::selectToArrayForContact($pcid, Post\Collection::FEATURED);
1062 if (!empty($posts)) {
1063 $old_featured = array_column($posts, 'uri-id');
1068 $featured = ActivityPub::fetchItems($apcontact['featured']);
1069 if (empty($featured)) {
1070 Logger::info('Contact does not have featured posts', ['contact' => $url]);
1072 foreach ($old_featured as $uri_id) {
1073 Post\Collection::remove($uri_id, Post\Collection::FEATURED);
1074 Logger::debug('Removed no longer featured post', ['uri-id' => $uri_id, 'contact' => $url]);
1082 foreach ($featured as $post) {
1083 if (empty($post['id'])) {
1086 $id = Item::fetchByLink($post['id']);
1088 $item = Post::selectFirst(['uri-id', 'featured'], ['id' => $id]);
1089 if (!empty($item['uri-id'])) {
1090 if (!$item['featured']) {
1091 Post\Collection::add($item['uri-id'], Post\Collection::FEATURED);
1092 Logger::debug('Added featured post', ['uri-id' => $item['uri-id'], 'contact' => $url]);
1095 Logger::debug('Post already had been featured', ['uri-id' => $item['uri-id'], 'contact' => $url]);
1099 $index = array_search($item['uri-id'], $old_featured);
1100 if (!($index === false)) {
1101 unset($old_featured[$index]);
1107 foreach ($old_featured as $uri_id) {
1108 Post\Collection::remove($uri_id, Post\Collection::FEATURED);
1109 Logger::debug('Removed no longer featured post', ['uri-id' => $uri_id, 'contact' => $url]);
1112 Logger::info('Fetched featured posts', ['new' => $new, 'old' => $old, 'contact' => $url]);
1116 * Fetches missing posts
1118 * @param FetchQueue $fetchQueue
1119 * @param string $url message URL
1120 * @param array $child activity array with the child of this message
1121 * @param string $relay_actor Relay actor
1122 * @param int $completion Completion mode, see Receiver::COMPLETION_*
1123 * @return string fetched message URL
1124 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1125 * @throws \ImagickException
1127 public static function fetchMissingActivity(FetchQueue $fetchQueue, string $url, array $child = [], string $relay_actor = '', int $completion = Receiver::COMPLETION_MANUAL): string
1129 if (!empty($child['receiver'])) {
1130 $uid = ActivityPub\Receiver::getFirstUserFromReceivers($child['receiver']);
1135 $object = ActivityPub::fetchContent($url, $uid);
1136 if (empty($object)) {
1137 Logger::notice('Activity was not fetchable, aborting.', ['url' => $url]);
1141 if (empty($object['id'])) {
1142 Logger::notice('Activity has got not id, aborting. ', ['url' => $url, 'object' => $object]);
1146 if (!empty($object['actor'])) {
1147 $object_actor = $object['actor'];
1148 } elseif (!empty($object['attributedTo'])) {
1149 $object_actor = $object['attributedTo'];
1150 if (is_array($object_actor)) {
1151 $compacted = JsonLD::compact($object);
1152 $object_actor = JsonLD::fetchElement($compacted, 'as:attributedTo', '@id');
1159 $signer = [$object_actor];
1161 if (!empty($child['author'])) {
1162 $actor = $child['author'];
1165 $actor = $object_actor;
1168 if (!empty($object['published'])) {
1169 $published = $object['published'];
1170 } elseif (!empty($child['published'])) {
1171 $published = $child['published'];
1173 $published = DateTimeFormat::utcNow();
1177 $activity['@context'] = $object['@context'] ?? ActivityPub::CONTEXT;
1178 unset($object['@context']);
1179 $activity['id'] = $object['id'];
1180 $activity['to'] = $object['to'] ?? [];
1181 $activity['cc'] = $object['cc'] ?? [];
1182 $activity['actor'] = $actor;
1183 $activity['object'] = $object;
1184 $activity['published'] = $published;
1185 $activity['type'] = 'Create';
1187 $ldactivity = JsonLD::compact($activity);
1189 if (!empty($relay_actor)) {
1190 $ldactivity['thread-completion'] = $ldactivity['from-relay'] = Contact::getIdForURL($relay_actor);
1191 $ldactivity['completion-mode'] = Receiver::COMPLETION_RELAY;
1192 } elseif (!empty($child['thread-completion'])) {
1193 $ldactivity['thread-completion'] = $child['thread-completion'];
1194 $ldactivity['completion-mode'] = $child['completion-mode'] ?? Receiver::COMPLETION_NONE;
1196 $ldactivity['thread-completion'] = Contact::getIdForURL($actor);
1197 $ldactivity['completion-mode'] = $completion;
1200 if (!empty($child['type'])) {
1201 $ldactivity['thread-children-type'] = $child['type'];
1204 if (!empty($relay_actor) && !self::acceptIncomingMessage($ldactivity, $object['id'])) {
1208 ActivityPub\Receiver::processActivity($fetchQueue, $ldactivity, json_encode($activity), $uid, true, false, $signer);
1210 Logger::notice('Activity had been fetched and processed.', ['url' => $url, 'object' => $activity['id']]);
1212 return $activity['id'];
1216 * Test if incoming relay messages should be accepted
1218 * @param array $activity activity array
1219 * @param string $id object ID
1220 * @return boolean true if message is accepted
1222 private static function acceptIncomingMessage(array $activity, string $id): bool
1224 if (empty($activity['as:object'])) {
1225 Logger::info('No object field in activity - accepted', ['id' => $id]);
1229 $replyto = JsonLD::fetchElement($activity['as:object'], 'as:inReplyTo', '@id');
1230 $uriid = ItemURI::getIdByURI($replyto ?? '');
1231 if (Post::exists(['uri-id' => $uriid])) {
1232 Logger::info('Post is a reply to an existing post - accepted', ['id' => $id, 'uri-id' => $uriid, 'replyto' => $replyto]);
1236 $attributed_to = JsonLD::fetchElement($activity['as:object'], 'as:attributedTo', '@id');
1237 $authorid = Contact::getIdForURL($attributed_to);
1239 $body = HTML::toBBCode(JsonLD::fetchElement($activity['as:object'], 'as:content', '@value') ?? '');
1242 $tags = Receiver::processTags(JsonLD::fetchElementArray($activity['as:object'], 'as:tag') ?? []);
1243 if (!empty($tags)) {
1244 foreach ($tags as $tag) {
1245 if ($tag['type'] != 'Hashtag') {
1248 $messageTags[] = ltrim(mb_strtolower($tag['name']), '#');
1252 return Relay::isSolicitedPost($messageTags, $body, $authorid, $id, Protocol::ACTIVITYPUB);
1256 * perform a "follow" request
1258 * @param array $activity
1260 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1261 * @throws \ImagickException
1263 public static function followUser(array $activity)
1265 $uid = User::getIdForURL($activity['object_id']);
1270 $owner = User::getOwnerDataById($uid);
1271 if (empty($owner)) {
1275 $cid = Contact::getIdForURL($activity['actor'], $uid);
1277 self::switchContact($cid);
1278 Contact::update(['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
1282 'author-id' => Contact::getIdForURL($activity['actor']),
1283 'author-link' => $activity['actor'],
1286 // Ensure that the contact has got the right network type
1287 self::switchContact($item['author-id']);
1289 $result = Contact::addRelationship($owner, [], $item, false, $activity['content'] ?? '');
1290 if ($result === true) {
1291 ActivityPub\Transmitter::sendContactAccept($item['author-link'], $activity['id'], $owner['uid']);
1294 $cid = Contact::getIdForURL($activity['actor'], $uid);
1299 if ($result && DI::config()->get('system', 'transmit_pending_events') && ($owner['contact-type'] == Contact::TYPE_COMMUNITY)) {
1300 self::transmitPendingEvents($cid, $owner['uid']);
1303 if (empty($contact)) {
1304 Contact::update(['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
1307 Logger::notice('Follow user ' . $uid . ' from contact ' . $cid . ' with id ' . $activity['id']);
1311 * Transmit pending events to the new follower
1313 * @param integer $cid Contact id
1314 * @param integer $uid User id
1317 private static function transmitPendingEvents(int $cid, int $uid)
1319 $account = DBA::selectFirst('account-user-view', ['ap-inbox', 'ap-sharedinbox'], ['id' => $cid]);
1320 $inbox = $account['ap-sharedinbox'] ?: $account['ap-inbox'];
1322 $events = DBA::select('event', ['id'], ["`uid` = ? AND `start` > ? AND `type` != ?", $uid, DateTimeFormat::utcNow(), 'birthday']);
1323 while ($event = DBA::fetch($events)) {
1324 $post = Post::selectFirst(['id', 'uri-id', 'created'], ['event-id' => $event['id']]);
1328 if (DI::config()->get('system', 'bulk_delivery')) {
1329 Post\Delivery::add($post['uri-id'], $uid, $inbox, $post['created'], Delivery::POST, [$cid]);
1330 Worker::add(PRIORITY_HIGH, 'APDelivery', '', 0, $inbox, 0);
1332 Worker::add(PRIORITY_HIGH, 'APDelivery', Delivery::POST, $post['id'], $inbox, $uid, [$cid], $post['uri-id']);
1338 * Update the given profile
1340 * @param array $activity
1341 * @throws \Exception
1343 public static function updatePerson(array $activity)
1345 if (empty($activity['object_id'])) {
1349 Logger::info('Updating profile', ['object' => $activity['object_id']]);
1350 Contact::updateFromProbeByURL($activity['object_id']);
1354 * Delete the given profile
1356 * @param array $activity
1358 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1360 public static function deletePerson(array $activity)
1362 if (empty($activity['object_id']) || empty($activity['actor'])) {
1363 Logger::info('Empty object id or actor.');
1367 if ($activity['object_id'] != $activity['actor']) {
1368 Logger::info('Object id does not match actor.');
1372 $contacts = DBA::select('contact', ['id'], ['nurl' => Strings::normaliseLink($activity['object_id'])]);
1373 while ($contact = DBA::fetch($contacts)) {
1374 Contact::remove($contact['id']);
1376 DBA::close($contacts);
1378 Logger::info('Deleted contact', ['object' => $activity['object_id']]);
1382 * Blocks the user by the contact
1384 * @param array $activity
1386 * @throws \Exception
1388 public static function blockAccount(array $activity)
1390 $cid = Contact::getIdForURL($activity['actor']);
1395 $uid = User::getIdForURL($activity['object_id']);
1400 Contact\User::setIsBlocked($cid, $uid, true);
1402 Logger::info('Contact blocked user', ['contact' => $cid, 'user' => $uid]);
1406 * Unblocks the user by the contact
1408 * @param array $activity
1410 * @throws \Exception
1412 public static function unblockAccount(array $activity)
1414 $cid = Contact::getIdForURL($activity['actor']);
1419 $uid = User::getIdForURL($activity['object_object']);
1424 Contact\User::setIsBlocked($cid, $uid, false);
1426 Logger::info('Contact unblocked user', ['contact' => $cid, 'user' => $uid]);
1430 * Accept a follow request
1432 * @param array $activity
1433 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1434 * @throws \ImagickException
1436 public static function acceptFollowUser(array $activity)
1438 $uid = User::getIdForURL($activity['object_actor']);
1443 $cid = Contact::getIdForURL($activity['actor'], $uid);
1445 Logger::info('No contact found', ['actor' => $activity['actor']]);
1449 self::switchContact($cid);
1451 $fields = ['pending' => false];
1453 $contact = DBA::selectFirst('contact', ['rel'], ['id' => $cid]);
1454 if ($contact['rel'] == Contact::FOLLOWER) {
1455 $fields['rel'] = Contact::FRIEND;
1458 $condition = ['id' => $cid];
1459 Contact::update($fields, $condition);
1460 Logger::info('Accept contact request', ['contact' => $cid, 'user' => $uid]);
1464 * Reject a follow request
1466 * @param array $activity
1467 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1468 * @throws \ImagickException
1470 public static function rejectFollowUser(array $activity)
1472 $uid = User::getIdForURL($activity['object_actor']);
1477 $cid = Contact::getIdForURL($activity['actor'], $uid);
1479 Logger::info('No contact found', ['actor' => $activity['actor']]);
1483 self::switchContact($cid);
1485 $contact = Contact::getById($cid, ['rel']);
1486 if ($contact['rel'] == Contact::SHARING) {
1487 Contact::remove($cid);
1488 Logger::info('Rejected contact request - contact removed', ['contact' => $cid, 'user' => $uid]);
1489 } elseif ($contact['rel'] == Contact::FRIEND) {
1490 Contact::update(['rel' => Contact::FOLLOWER], ['id' => $cid]);
1492 Logger::info('Rejected contact request', ['contact' => $cid, 'user' => $uid]);
1497 * Undo activity like "like" or "dislike"
1499 * @param array $activity
1500 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1501 * @throws \ImagickException
1503 public static function undoActivity(array $activity)
1505 if (empty($activity['object_id'])) {
1509 if (empty($activity['object_actor'])) {
1513 $author_id = Contact::getIdForURL($activity['object_actor']);
1514 if (empty($author_id)) {
1518 Item::markForDeletion(['uri' => $activity['object_id'], 'author-id' => $author_id, 'gravity' => GRAVITY_ACTIVITY]);
1522 * Activity to remove a follower
1524 * @param array $activity
1525 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1526 * @throws \ImagickException
1528 public static function undoFollowUser(array $activity)
1530 $uid = User::getIdForURL($activity['object_object']);
1535 $owner = User::getOwnerDataById($uid);
1536 if (empty($owner)) {
1540 $cid = Contact::getIdForURL($activity['actor'], $uid);
1542 Logger::info('No contact found', ['actor' => $activity['actor']]);
1546 self::switchContact($cid);
1548 $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
1549 if (!DBA::isResult($contact)) {
1553 Contact::removeFollower($contact);
1554 Logger::info('Undo following request', ['contact' => $cid, 'user' => $uid]);
1558 * Switches a contact to AP if needed
1560 * @param integer $cid Contact ID
1562 * @throws \Exception
1564 private static function switchContact(int $cid)
1566 $contact = DBA::selectFirst('contact', ['network', 'url'], ['id' => $cid]);
1567 if (!DBA::isResult($contact) || in_array($contact['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN]) || Contact::isLocal($contact['url'])) {
1571 Logger::info('Change existing contact', ['cid' => $cid, 'previous' => $contact['network']]);
1572 Contact::updateFromProbe($cid);
1576 * Collects implicit mentions like:
1577 * - the author of the parent item
1578 * - all the mentioned conversants in the parent item
1580 * @param array $parent Item array with at least ['id', 'author-link', 'alias']
1582 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1584 private static function getImplicitMentionList(array $parent): array
1586 $parent_terms = Tag::getByURIId($parent['uri-id'], [Tag::MENTION, Tag::IMPLICIT_MENTION, Tag::EXCLUSIVE_MENTION]);
1588 $parent_author = Contact::getByURL($parent['author-link'], false, ['url', 'nurl', 'alias']);
1590 $implicit_mentions = [];
1591 if (empty($parent_author['url'])) {
1592 Logger::notice('Author public contact unknown.', ['author-link' => $parent['author-link'], 'parent-id' => $parent['id']]);
1594 $implicit_mentions[] = $parent_author['url'];
1595 $implicit_mentions[] = $parent_author['nurl'];
1596 $implicit_mentions[] = $parent_author['alias'];
1599 if (!empty($parent['alias'])) {
1600 $implicit_mentions[] = $parent['alias'];
1603 foreach ($parent_terms as $term) {
1604 $contact = Contact::getByURL($term['url'], false, ['url', 'nurl', 'alias']);
1605 if (!empty($contact['url'])) {
1606 $implicit_mentions[] = $contact['url'];
1607 $implicit_mentions[] = $contact['nurl'];
1608 $implicit_mentions[] = $contact['alias'];
1612 return $implicit_mentions;
1616 * Strips from the body prepended implicit mentions
1618 * @param string $body
1619 * @param array $parent
1622 private static function removeImplicitMentionsFromBody(string $body, array $parent): string
1624 if (DI::config()->get('system', 'disable_implicit_mentions')) {
1628 $potential_mentions = self::getImplicitMentionList($parent);
1630 $kept_mentions = [];
1632 // Extract one prepended mention at a time from the body
1633 while(preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $body, $matches)) {
1634 if (!in_array($matches[2], $potential_mentions)) {
1635 $kept_mentions[] = $matches[1];
1638 $body = $matches[3];
1641 // Re-appending the kept mentions to the body after extraction
1642 $kept_mentions[] = $body;
1644 return implode('', $kept_mentions);
1648 * Adds links to string mentions
1650 * @param string $body
1651 * @param array $tags
1654 protected static function addMentionLinks(string $body, array $tags): string
1656 // This prevents links to be added again to Pleroma-style mention links
1657 $body = self::normalizeMentionLinks($body);
1659 $body = BBCode::performWithEscapedTags($body, ['url'], function ($body) use ($tags) {
1660 foreach ($tags as $tag) {
1661 if (empty($tag['name']) || empty($tag['type']) || empty($tag['href']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
1665 $hash = substr($tag['name'], 0, 1);
1666 $name = substr($tag['name'], 1);
1667 if (!in_array($hash, Tag::TAG_CHARACTER)) {
1669 $name = $tag['name'];
1672 $body = str_replace($tag['name'], $hash . '[url=' . $tag['href'] . ']' . $name . '[/url]', $body);