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 array $activity Activity array
193 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
194 * @throws \ImagickException
196 public static function updateItem(array $activity)
198 $item = Post::selectFirst(['uri', 'uri-id', 'thr-parent', 'gravity', 'post-type'], ['uri' => $activity['id']]);
199 if (!DBA::isResult($item)) {
200 Logger::warning('No existing item, item will be created', ['uri' => $activity['id']]);
201 $item = self::createItem($activity);
206 self::postItem($activity, $item);
210 $item['changed'] = DateTimeFormat::utcNow();
211 $item['edited'] = DateTimeFormat::utc($activity['updated']);
213 $item = self::processContent($activity, $item);
215 self::storeAttachments($activity, $item);
216 self::storeQuestion($activity, $item);
222 Post\History::add($item['uri-id'], $item);
223 Item::update($item, ['uri' => $activity['id']]);
225 Queue::remove($activity);
227 if ($activity['object_type'] == 'as:Event') {
228 $posts = Post::select(['event-id', 'uid'], ["`uri` = ? AND `event-id` > ?", $activity['id'], 0]);
229 while ($post = DBA::fetch($posts)) {
230 self::updateEvent($post['event-id'], $activity);
236 * Update an existing event
238 * @param int $event_id
239 * @param array $activity
241 private static function updateEvent(int $event_id, array $activity)
243 $event = DBA::selectFirst('event', [], ['id' => $event_id]);
245 $event['edited'] = DateTimeFormat::utc($activity['updated']);
246 $event['summary'] = HTML::toBBCode($activity['name']);
247 $event['desc'] = HTML::toBBCode($activity['content']);
248 if (!empty($activity['start-time'])) {
249 $event['start'] = DateTimeFormat::utc($activity['start-time']);
251 if (!empty($activity['end-time'])) {
252 $event['finish'] = DateTimeFormat::utc($activity['end-time']);
254 $event['nofinish'] = empty($event['finish']);
255 $event['location'] = $activity['location'];
257 Logger::info('Updating event', ['uri' => $activity['id'], 'id' => $event_id]);
258 Event::store($event);
262 * Prepares data for a message
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(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['context'])) {
284 $item['conversation'] = $activity['context'];
285 } elseif (!empty($activity['conversation'])) {
286 $item['conversation'] = $activity['conversation'];
289 if (!empty($item['conversation'])) {
290 $conversation = Post::selectFirstThread(['uri'], ['conversation' => $item['conversation']]);
291 if (!empty($conversation)) {
292 Logger::debug('Got conversation', ['conversation' => $item['conversation'], 'parent' => $conversation]);
293 $item['parent-uri'] = $conversation['uri'];
299 if (empty($activity['directmessage']) && ($activity['id'] != $activity['reply-to-id']) && !Post::exists(['uri' => $activity['reply-to-id']])) {
300 $recursion_depth = $activity['recursion-depth'] ?? 0;
301 Logger::notice('Parent not found. Try to refetch it.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
302 if ($recursion_depth < 10) {
303 $result = self::fetchMissingActivity($activity['reply-to-id'], $activity, '', Receiver::COMPLETION_AUTO);
304 $fetch_by_worker = empty($result);
306 Logger::notice('Recursion level is too high.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
307 $fetch_by_worker = true;
310 if ($fetch_by_worker && Queue::hasWorker($activity)) {
311 Logger::notice('There is already a worker task to fetch the post.', ['id' => $activity['id'], 'parent' => $activity['reply-to-id']]);
312 $fetch_by_worker = false;
313 if (!empty($conversation)) {
318 if ($fetch_by_worker) {
319 Logger::notice('Fetching is done by worker.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
320 $activity['recursion-depth'] = 0;
321 $wid = Worker::add(PRIORITY_HIGH, 'FetchMissingActivity', $activity['reply-to-id'], $activity, '', Receiver::COMPLETION_AUTO);
322 Queue::setWorkerId($activity, $wid);
323 if (!empty($conversation)) {
326 } elseif (!empty($result)) {
327 if (($item['thr-parent'] != $result) && Post::exists(['uri' => $result])) {
328 $item['thr-parent'] = $result;
333 $item['diaspora_signed_text'] = $activity['diaspora:comment'] ?? '';
335 if (empty($conversation) && empty($activity['directmessage']) && ($item['gravity'] != GRAVITY_PARENT) && !Post::exists(['uri' => $item['thr-parent']])) {
336 Logger::info('Parent not found, message will be discarded.', ['thr-parent' => $item['thr-parent']]);
340 $item['network'] = Protocol::ACTIVITYPUB;
341 $item['author-link'] = $activity['author'];
342 $item['author-id'] = Contact::getIdForURL($activity['author']);
343 $item['owner-link'] = $activity['actor'];
344 $item['owner-id'] = Contact::getIdForURL($activity['actor']);
346 if (in_array(0, $activity['receiver']) && !empty($activity['unlisted'])) {
347 $item['private'] = Item::UNLISTED;
348 } elseif (in_array(0, $activity['receiver'])) {
349 $item['private'] = Item::PUBLIC;
351 $item['private'] = Item::PRIVATE;
354 if (!empty($activity['raw'])) {
355 $item['source'] = $activity['raw'];
356 $item['protocol'] = Conversation::PARCEL_ACTIVITYPUB;
357 $item['conversation-href'] = $activity['context'] ?? '';
358 $item['conversation-uri'] = $activity['conversation'] ?? '';
360 if (isset($activity['push'])) {
361 $item['direction'] = $activity['push'] ? Conversation::PUSH : Conversation::PULL;
365 if (!empty($activity['from-relay'])) {
366 $item['direction'] = Conversation::RELAY;
369 if ($activity['object_type'] == 'as:Article') {
370 $item['post-type'] = Item::PT_ARTICLE;
371 } elseif ($activity['object_type'] == 'as:Audio') {
372 $item['post-type'] = Item::PT_AUDIO;
373 } elseif ($activity['object_type'] == 'as:Document') {
374 $item['post-type'] = Item::PT_DOCUMENT;
375 } elseif ($activity['object_type'] == 'as:Event') {
376 $item['post-type'] = Item::PT_EVENT;
377 } elseif ($activity['object_type'] == 'as:Image') {
378 $item['post-type'] = Item::PT_IMAGE;
379 } elseif ($activity['object_type'] == 'as:Page') {
380 $item['post-type'] = Item::PT_PAGE;
381 } elseif ($activity['object_type'] == 'as:Question') {
382 $item['post-type'] = Item::PT_POLL;
383 } elseif ($activity['object_type'] == 'as:Video') {
384 $item['post-type'] = Item::PT_VIDEO;
386 $item['post-type'] = Item::PT_NOTE;
389 $item['isForum'] = false;
391 if (!empty($activity['thread-completion'])) {
392 if ($activity['thread-completion'] != $item['owner-id']) {
393 $actor = Contact::getById($activity['thread-completion'], ['url']);
394 $item['causer-link'] = $actor['url'];
395 $item['causer-id'] = $activity['thread-completion'];
396 Logger::info('Use inherited actor as causer.', ['id' => $item['owner-id'], 'activity' => $activity['thread-completion'], 'owner' => $item['owner-link'], 'actor' => $actor['url']]);
398 // Store the original actor in the "causer" fields to enable the check for ignored or blocked contacts
399 $item['causer-link'] = $item['owner-link'];
400 $item['causer-id'] = $item['owner-id'];
401 Logger::info('Use actor as causer.', ['id' => $item['owner-id'], 'actor' => $item['owner-link']]);
404 $item['owner-link'] = $item['author-link'];
405 $item['owner-id'] = $item['author-id'];
407 $actor = APContact::getByURL($item['owner-link'], false);
408 $item['isForum'] = ($actor['type'] == 'Group');
411 $item['uri'] = $activity['id'];
413 if (empty($activity['published']) || empty($activity['updated'])) {
414 DI::logger()->notice('published or updated keys are empty for activity', ['activity' => $activity, 'callstack' => System::callstack(10)]);
417 $item['created'] = DateTimeFormat::utc($activity['published'] ?? 'now');
418 $item['edited'] = DateTimeFormat::utc($activity['updated'] ?? 'now');
419 $guid = $activity['sc:identifier'] ?: self::getGUIDByURL($item['uri']);
420 $item['guid'] = $activity['diaspora:guid'] ?: $guid;
422 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
423 if (empty($item['uri-id'])) {
424 Logger::warning('Unable to get a uri-id for an item uri', ['uri' => $item['uri'], 'guid' => $item['guid']]);
428 $item = self::processContent($activity, $item);
430 Logger::info('Message was not processed');
434 $item['plink'] = $activity['alternate-url'] ?? $item['uri'];
436 self::storeAttachments($activity, $item);
437 self::storeQuestion($activity, $item);
439 // We received the post via AP, so we set the protocol of the server to AP
440 $contact = Contact::getById($item['author-id'], ['gsid']);
441 if (!empty($contact['gsid'])) {
442 GServer::setProtocol($contact['gsid'], Post\DeliveryData::ACTIVITYPUB);
445 if ($item['author-id'] != $item['owner-id']) {
446 $contact = Contact::getById($item['owner-id'], ['gsid']);
447 if (!empty($contact['gsid'])) {
448 GServer::setProtocol($contact['gsid'], Post\DeliveryData::ACTIVITYPUB);
458 * @param array $activity
459 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
460 * @throws \ImagickException
462 public static function deleteItem(array $activity)
464 $owner = Contact::getIdForURL($activity['actor']);
466 Logger::info('Deleting item', ['object' => $activity['object_id'], 'owner' => $owner]);
467 Item::markForDeletion(['uri' => $activity['object_id'], 'owner-id' => $owner]);
468 Queue::remove($activity);
472 * Prepare the item array for an activity
474 * @param array $activity Activity array
475 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
476 * @throws \ImagickException
478 public static function addTag(array $activity)
480 if (empty($activity['object_content']) || empty($activity['object_id'])) {
484 foreach ($activity['receiver'] as $receiver) {
485 $item = Post::selectFirst(['id', 'uri-id', 'origin', 'author-link'], ['uri' => $activity['target_id'], 'uid' => $receiver]);
486 if (!DBA::isResult($item)) {
487 // We don't fetch missing content for this purpose
491 if (($item['author-link'] != $activity['actor']) && !$item['origin']) {
492 Logger::info('Not origin, not from the author, skipping update', ['id' => $item['id'], 'author' => $item['author-link'], 'actor' => $activity['actor']]);
496 Tag::store($item['uri-id'], Tag::HASHTAG, $activity['object_content'], $activity['object_id']);
497 Logger::info('Tagged item', ['id' => $item['id'], 'tag' => $activity['object_content'], 'uri' => $activity['target_id'], 'actor' => $activity['actor']]);
502 * Prepare the item array for an activity
504 * @param array $activity Activity array
505 * @param string $verb Activity verb
506 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
507 * @throws \ImagickException
509 public static function createActivity(array $activity, string $verb)
511 $activity['reply-to-id'] = $activity['object_id'];
512 $item = self::createItem($activity);
517 $item['verb'] = $verb;
518 $item['thr-parent'] = $activity['object_id'];
519 $item['gravity'] = GRAVITY_ACTIVITY;
520 unset($item['post-type']);
521 $item['object-type'] = Activity\ObjectType::NOTE;
523 if (!empty($activity['content'])) {
524 $item['body'] = HTML::toBBCode($activity['content']);
527 $item['diaspora_signed_text'] = $activity['diaspora:like'] ?? '';
529 self::postItem($activity, $item);
533 * Fetch the Uri-Id of a post for the "featured" collection
535 * @param array $activity
538 private static function getUriIdForFeaturedCollection(array $activity)
540 $actor = APContact::getByURL($activity['actor']);
545 // Refetch the account when the "featured" collection is missing.
546 // This can be removed in a future version (end of 2022 should be good).
547 if (empty($actor['featured'])) {
548 $actor = APContact::getByURL($activity['actor'], true);
554 if ($activity['target_id'] != $actor['featured']) {
558 $id = Contact::getIdForURL($activity['actor']);
563 $parent = Post::selectFirst(['uri-id'], ['uri' => $activity['object_id'], 'author-id' => $id]);
564 if (!empty($parent['uri-id'])) {
565 return $parent['uri-id'];
572 * Add a post to the "Featured" collection
574 * @param array $activity
576 public static function addToFeaturedCollection(array $activity)
578 $uriid = self::getUriIdForFeaturedCollection($activity);
583 Logger::debug('Add post to featured collection', ['uri-id' => $uriid]);
585 Post\Collection::add($uriid, Post\Collection::FEATURED);
586 Queue::remove($activity);
590 * Remove a post to the "Featured" collection
592 * @param array $activity
594 public static function removeFromFeaturedCollection(array $activity)
596 $uriid = self::getUriIdForFeaturedCollection($activity);
601 Logger::debug('Remove post from featured collection', ['uri-id' => $uriid]);
603 Post\Collection::remove($uriid, Post\Collection::FEATURED);
604 Queue::remove($activity);
610 * @param array $activity Activity array
613 * @return int event id
616 public static function createEvent(array $activity, array $item): int
618 $event['summary'] = HTML::toBBCode($activity['name'] ?: $activity['summary']);
619 $event['desc'] = HTML::toBBCode($activity['content']);
620 if (!empty($activity['start-time'])) {
621 $event['start'] = DateTimeFormat::utc($activity['start-time']);
623 if (!empty($activity['end-time'])) {
624 $event['finish'] = DateTimeFormat::utc($activity['end-time']);
626 $event['nofinish'] = empty($event['finish']);
627 $event['location'] = $activity['location'];
628 $event['cid'] = $item['contact-id'];
629 $event['uid'] = $item['uid'];
630 $event['uri'] = $item['uri'];
631 $event['edited'] = $item['edited'];
632 $event['private'] = $item['private'];
633 $event['guid'] = $item['guid'];
634 $event['plink'] = $item['plink'];
635 $event['network'] = $item['network'];
636 $event['protocol'] = $item['protocol'];
637 $event['direction'] = $item['direction'];
638 $event['source'] = $item['source'];
640 $ev = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
641 if (DBA::isResult($ev)) {
642 $event['id'] = $ev['id'];
645 $event_id = Event::store($event);
647 Logger::info('Event was stored', ['id' => $event_id]);
653 * Process the content
655 * @param array $activity Activity array
657 * @return array|bool Returns the item array or false if there was an unexpected occurrence
660 private static function processContent(array $activity, array $item)
662 if (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/markdown')) {
663 $item['title'] = strip_tags($activity['name']);
664 $content = Markdown::toBBCode($activity['content']);
665 } elseif (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/bbcode')) {
666 $item['title'] = $activity['name'];
667 $content = $activity['content'];
669 // By default assume "text/html"
670 $item['title'] = HTML::toBBCode($activity['name'] ?? '');
671 $content = HTML::toBBCode($activity['content'] ?? '');
674 $item['title'] = trim(BBCode::toPlaintext($item['title']));
676 if (!empty($activity['languages'])) {
677 $item['language'] = self::processLanguages($activity['languages']);
680 if (!empty($activity['emojis'])) {
681 $content = self::replaceEmojis($item['uri-id'], $content, $activity['emojis']);
684 $content = self::addMentionLinks($content, $activity['tags']);
686 if (!empty($activity['source'])) {
687 $item['body'] = $activity['source'];
688 $item['raw-body'] = $content;
689 $item['body'] = Item::improveSharedDataInBody($item);
691 $parent_uri = $item['parent-uri'] ?? $item['thr-parent'];
692 if (empty($activity['directmessage']) && ($parent_uri != $item['uri']) && ($item['gravity'] == GRAVITY_COMMENT)) {
693 $parent = Post::selectFirst(['id', 'uri-id', 'private', 'author-link', 'alias'], ['uri' => $parent_uri]);
694 if (!DBA::isResult($parent)) {
695 Logger::warning('Unknown parent item.', ['uri' => $parent_uri]);
698 if (($item['private'] == Item::PRIVATE) && ($parent['private'] != Item::PRIVATE)) {
699 Logger::warning('Item is private but the parent is not. Dropping.', ['item-uri' => $item['uri'], 'thr-parent' => $item['thr-parent']]);
703 $content = self::removeImplicitMentionsFromBody($content, $parent);
705 $item['content-warning'] = HTML::toBBCode($activity['summary'] ?? '');
706 $item['raw-body'] = $item['body'] = $content;
709 self::storeFromBody($item);
710 self::storeTags($item['uri-id'], $activity['tags']);
712 self::storeReceivers($item['uri-id'], $activity['receiver_urls'] ?? []);
714 $item['location'] = $activity['location'];
716 if (!empty($activity['latitude']) && !empty($activity['longitude'])) {
717 $item['coord'] = $activity['latitude'] . ' ' . $activity['longitude'];
720 $item['app'] = $activity['generator'];
726 * Store hashtags and mentions
730 private static function storeFromBody(array $item)
732 // Make sure to delete all existing tags (can happen when called via the update functionality)
733 DBA::delete('post-tag', ['uri-id' => $item['uri-id']]);
735 Tag::storeFromBody($item['uri-id'], $item['body'], '@!');
739 * Generate a GUID out of an URL of an ActivityPub post.
741 * @param string $url message URL
742 * @return string with GUID
744 private static function getGUIDByURL(string $url): string
746 $parsed = parse_url($url);
748 $host_hash = hash('crc32', $parsed['host']);
750 unset($parsed["scheme"]);
751 unset($parsed["host"]);
753 $path = implode("/", $parsed);
755 return $host_hash . '-'. hash('fnv164', $path) . '-'. hash('joaat', $path);
759 * Checks if an incoming message is wanted
761 * @param array $activity
763 * @return boolean Is the message wanted?
765 private static function isSolicitedMessage(array $activity, array $item): bool
767 // The checks are split to improve the support when searching why a message was accepted.
768 if (count($activity['receiver']) != 1) {
769 // The message has more than one receiver, so it is wanted.
770 Logger::debug('Message has got several receivers - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
774 if ($item['private'] == Item::PRIVATE) {
775 // We only look at public posts here. Private posts are expected to be intentionally posted to the single receiver.
776 Logger::debug('Message is private - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
780 if (!empty($activity['from-relay'])) {
781 // We check relay posts at another place. When it arrived here, the message is already checked.
782 Logger::debug('Message is a relay post that is already checked - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
786 if (in_array($activity['completion-mode'] ?? Receiver::COMPLETION_NONE, [Receiver::COMPLETION_MANUAL, Receiver::COMPLETION_ANNOUCE])) {
787 // Manual completions and completions caused by reshares are allowed without any further checks.
788 Logger::debug('Message is in completion mode - accepted', ['mode' => $activity['completion-mode'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
792 if ($item['gravity'] != GRAVITY_PARENT) {
793 // We cannot reliably check at this point if a comment or activity belongs to an accepted post or needs to be fetched
794 // This can possibly be improved in the future.
795 Logger::debug('Message is no parent - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
799 $tags = array_column(Tag::getByURIId($item['uri-id'], [Tag::HASHTAG]), 'name');
800 if (Relay::isSolicitedPost($tags, $item['body'], $item['author-id'], $item['uri'], Protocol::ACTIVITYPUB)) {
801 Logger::debug('Post is accepted because of the relay settings', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
809 * Creates an item post
811 * @param array $activity Activity data
812 * @param array $item item array
813 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
814 * @throws \ImagickException
816 public static function postItem(array $activity, array $item)
824 ksort($activity['receiver']);
826 if (!self::isSolicitedMessage($activity, $item)) {
827 DBA::delete('item-uri', ['id' => $item['uri-id']]);
831 foreach ($activity['receiver'] as $receiver) {
832 if ($receiver == -1) {
836 $item['uid'] = $receiver;
838 $type = $activity['reception_type'][$receiver] ?? Receiver::TARGET_UNKNOWN;
840 case Receiver::TARGET_TO:
841 $item['post-reason'] = Item::PR_TO;
843 case Receiver::TARGET_CC:
844 $item['post-reason'] = Item::PR_CC;
846 case Receiver::TARGET_BTO:
847 $item['post-reason'] = Item::PR_BTO;
849 case Receiver::TARGET_BCC:
850 $item['post-reason'] = Item::PR_BCC;
852 case Receiver::TARGET_FOLLOWER:
853 $item['post-reason'] = Item::PR_FOLLOWER;
855 case Receiver::TARGET_ANSWER:
856 $item['post-reason'] = Item::PR_COMMENT;
858 case Receiver::TARGET_GLOBAL:
859 $item['post-reason'] = Item::PR_GLOBAL;
862 $item['post-reason'] = Item::PR_NONE;
865 if (!empty($activity['from-relay'])) {
866 $item['post-reason'] = Item::PR_RELAY;
867 } elseif (!empty($activity['thread-completion'])) {
868 $item['post-reason'] = Item::PR_FETCHED;
871 if ($item['isForum'] ?? false) {
872 $item['contact-id'] = Contact::getIdForURL($activity['actor'], $receiver);
874 $item['contact-id'] = Contact::getIdForURL($activity['author'], $receiver);
877 if (($receiver != 0) && empty($item['contact-id'])) {
878 $item['contact-id'] = Contact::getIdForURL($activity['author']);
881 if (!empty($activity['directmessage'])) {
882 self::postMail($activity, $item);
886 if (!($item['isForum'] ?? false) && ($receiver != 0) && ($item['gravity'] == GRAVITY_PARENT) && !Contact::isSharingByURL($activity['author'], $receiver)) {
887 if ($item['post-reason'] == Item::PR_BCC) {
888 Logger::info('Top level post via BCC from a non sharer, ignoring', ['uid' => $receiver, 'contact' => $item['contact-id']]);
893 !empty($activity['thread-children-type'])
894 && in_array($activity['thread-children-type'], Receiver::ACTIVITY_TYPES)
895 && DI::pConfig()->get($receiver, 'system', 'accept_only_sharer') != Item::COMPLETION_LIKE
897 Logger::info('Top level post from thread completion from a non sharer had been initiated via an activity, ignoring',
898 ['type' => $activity['thread-children-type'], 'user' => $item['uid'], 'causer' => $item['causer-link'], 'author' => $activity['author'], 'url' => $item['uri']]);
905 if ($receiver != 0) {
906 $user = User::getById($receiver, ['account-type']);
907 if (!empty($user['account-type'])) {
908 $is_forum = ($user['account-type'] == User::ACCOUNT_TYPE_COMMUNITY);
912 if (!$is_forum && DI::pConfig()->get($receiver, 'system', 'accept_only_sharer') == Item::COMPLETION_NONE && ($receiver != 0) && ($item['gravity'] == GRAVITY_PARENT)) {
913 $skip = !Contact::isSharingByURL($activity['author'], $receiver);
915 if ($skip && (($activity['type'] == 'as:Announce') || ($item['isForum'] ?? false))) {
916 $skip = !Contact::isSharingByURL($activity['actor'], $receiver);
920 Logger::info('Skipping post', ['uid' => $receiver, 'url' => $item['uri']]);
924 Logger::info('Accepting post', ['uid' => $receiver, 'url' => $item['uri']]);
927 if (($item['gravity'] != GRAVITY_ACTIVITY) && ($activity['object_type'] == 'as:Event')) {
928 $event_id = self::createEvent($activity, $item);
930 $item = Event::getItemArrayForImportedId($event_id, $item);
933 $item_id = Item::insert($item);
935 Logger::info('Item insertion successful', ['user' => $item['uid'], 'item_id' => $item_id]);
938 Logger::notice('Item insertion aborted', ['user' => $item['uid']]);
941 if ($item['uid'] == 0) {
947 Queue::remove($activity);
948 Queue::processReplyByUri($item['uri']);
951 // Store send a follow request for every reshare - but only when the item had been stored
952 if ($stored && ($item['private'] != Item::PRIVATE) && ($item['gravity'] == GRAVITY_PARENT) && !empty($item['author-link']) && ($item['author-link'] != $item['owner-link'])) {
953 $author = APContact::getByURL($item['owner-link'], false);
954 // We send automatic follow requests for reshared messages. (We don't need though for forum posts)
955 if ($author['type'] != 'Group') {
956 Logger::info('Send follow request', ['uri' => $item['uri'], 'stored' => $stored, 'to' => $item['author-link']]);
957 ActivityPub\Transmitter::sendFollowObject($item['uri'], $item['author-link']);
963 * Store tags and mentions into the tag table
965 * @param integer $uriid
968 private static function storeTags(int $uriid, array $tags = null)
970 foreach ($tags as $tag) {
971 if (empty($tag['name']) || empty($tag['type']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
975 $hash = substr($tag['name'], 0, 1);
977 if ($tag['type'] == 'Mention') {
978 if (in_array($hash, [Tag::TAG_CHARACTER[Tag::MENTION],
979 Tag::TAG_CHARACTER[Tag::EXCLUSIVE_MENTION],
980 Tag::TAG_CHARACTER[Tag::IMPLICIT_MENTION]])) {
981 $tag['name'] = substr($tag['name'], 1);
983 $type = Tag::IMPLICIT_MENTION;
985 if (!empty($tag['href'])) {
986 $apcontact = APContact::getByURL($tag['href']);
987 if (!empty($apcontact['name']) || !empty($apcontact['nick'])) {
988 $tag['name'] = $apcontact['name'] ?: $apcontact['nick'];
991 } elseif ($tag['type'] == 'Hashtag') {
992 if ($hash == Tag::TAG_CHARACTER[Tag::HASHTAG]) {
993 $tag['name'] = substr($tag['name'], 1);
995 $type = Tag::HASHTAG;
998 if (empty($tag['name'])) {
1002 Tag::store($uriid, $type, $tag['name'], $tag['href']);
1006 public static function storeReceivers(int $uriid, array $receivers)
1008 foreach (['as:to' => Tag::TO, 'as:cc' => Tag::CC, 'as:bto' => Tag::BTO, 'as:bcc' => Tag::BCC] as $element => $type) {
1009 if (!empty($receivers[$element])) {
1010 foreach ($receivers[$element] as $receiver) {
1011 if ($receiver == ActivityPub::PUBLIC_COLLECTION) {
1012 $name = Receiver::PUBLIC_COLLECTION;
1014 $name = trim(parse_url($receiver, PHP_URL_PATH), '/');
1017 $target = Tag::getTargetType($receiver);
1018 Logger::debug('Got target type', ['type' => $target, 'url' => $receiver]);
1019 Tag::store($uriid, $type, $name, $receiver, $target);
1026 * Creates an mail post
1028 * @param array $activity Activity data
1029 * @param array $item item array
1030 * @return int|bool New mail table row id or false on error
1031 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1033 private static function postMail(array $activity, array $item)
1035 if (($item['gravity'] != GRAVITY_PARENT) && !DBA::exists('mail', ['uri' => $item['thr-parent'], 'uid' => $item['uid']])) {
1036 Logger::info('Parent not found, mail will be discarded.', ['uid' => $item['uid'], 'uri' => $item['thr-parent']]);
1040 Logger::info('Direct Message', $item);
1043 $msg['uid'] = $item['uid'];
1045 $msg['contact-id'] = $item['contact-id'];
1047 $contact = Contact::getById($item['contact-id'], ['name', 'url', 'photo']);
1048 $msg['from-name'] = $contact['name'];
1049 $msg['from-url'] = $contact['url'];
1050 $msg['from-photo'] = $contact['photo'];
1052 $msg['uri'] = $item['uri'];
1053 $msg['created'] = $item['created'];
1055 $parent = DBA::selectFirst('mail', ['parent-uri', 'title'], ['uri' => $item['thr-parent']]);
1056 if (DBA::isResult($parent)) {
1057 $msg['parent-uri'] = $parent['parent-uri'];
1058 $msg['title'] = $parent['title'];
1060 $msg['parent-uri'] = $item['thr-parent'];
1062 if (!empty($item['title'])) {
1063 $msg['title'] = $item['title'];
1064 } elseif (!empty($item['content-warning'])) {
1065 $msg['title'] = $item['content-warning'];
1067 // Trying to generate a title out of the body
1068 $title = $item['body'];
1070 while (preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $title, $matches)) {
1071 $title = $matches[3];
1074 $title = trim(BBCode::toPlaintext($title));
1076 if (strlen($title) > 20) {
1077 $title = substr($title, 0, 20) . '...';
1080 $msg['title'] = $title;
1083 $msg['body'] = $item['body'];
1085 return Mail::insert($msg);
1089 * Fetch featured posts from a contact with the given url
1091 * @param string $url
1094 public static function fetchFeaturedPosts(string $url)
1096 Logger::info('Fetch featured posts', ['contact' => $url]);
1098 $apcontact = APContact::getByURL($url);
1099 if (empty($apcontact['featured'])) {
1100 Logger::info('Contact does not have a featured collection', ['contact' => $url]);
1104 $pcid = Contact::getIdForURL($url, 0, false);
1106 Logger::info('Contact not found', ['contact' => $url]);
1110 $posts = Post\Collection::selectToArrayForContact($pcid, Post\Collection::FEATURED);
1111 if (!empty($posts)) {
1112 $old_featured = array_column($posts, 'uri-id');
1117 $featured = ActivityPub::fetchItems($apcontact['featured']);
1118 if (empty($featured)) {
1119 Logger::info('Contact does not have featured posts', ['contact' => $url]);
1121 foreach ($old_featured as $uri_id) {
1122 Post\Collection::remove($uri_id, Post\Collection::FEATURED);
1123 Logger::debug('Removed no longer featured post', ['uri-id' => $uri_id, 'contact' => $url]);
1131 foreach ($featured as $post) {
1132 if (empty($post['id'])) {
1135 $id = Item::fetchByLink($post['id']);
1137 $item = Post::selectFirst(['uri-id', 'featured'], ['id' => $id]);
1138 if (!empty($item['uri-id'])) {
1139 if (!$item['featured']) {
1140 Post\Collection::add($item['uri-id'], Post\Collection::FEATURED);
1141 Logger::debug('Added featured post', ['uri-id' => $item['uri-id'], 'contact' => $url]);
1144 Logger::debug('Post already had been featured', ['uri-id' => $item['uri-id'], 'contact' => $url]);
1148 $index = array_search($item['uri-id'], $old_featured);
1149 if (!($index === false)) {
1150 unset($old_featured[$index]);
1156 foreach ($old_featured as $uri_id) {
1157 Post\Collection::remove($uri_id, Post\Collection::FEATURED);
1158 Logger::debug('Removed no longer featured post', ['uri-id' => $uri_id, 'contact' => $url]);
1161 Logger::info('Fetched featured posts', ['new' => $new, 'old' => $old, 'contact' => $url]);
1165 * Fetches missing posts
1167 * @param string $url message URL
1168 * @param array $child activity array with the child of this message
1169 * @param string $relay_actor Relay actor
1170 * @param int $completion Completion mode, see Receiver::COMPLETION_*
1171 * @return string fetched message URL
1172 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1173 * @throws \ImagickException
1175 public static function fetchMissingActivity(string $url, array $child = [], string $relay_actor = '', int $completion = Receiver::COMPLETION_MANUAL): string
1177 if (!empty($child['receiver'])) {
1178 $uid = ActivityPub\Receiver::getFirstUserFromReceivers($child['receiver']);
1183 $object = ActivityPub::fetchContent($url, $uid);
1184 if (empty($object)) {
1185 Logger::notice('Activity was not fetchable, aborting.', ['url' => $url, 'uid' => $uid]);
1189 if (empty($object['id'])) {
1190 Logger::notice('Activity has got not id, aborting. ', ['url' => $url, 'object' => $object]);
1194 if (!empty($object['actor'])) {
1195 $object_actor = $object['actor'];
1196 } elseif (!empty($object['attributedTo'])) {
1197 $object_actor = $object['attributedTo'];
1198 if (is_array($object_actor)) {
1199 $compacted = JsonLD::compact($object);
1200 $object_actor = JsonLD::fetchElement($compacted, 'as:attributedTo', '@id');
1207 $signer = [$object_actor];
1209 if (!empty($child['author'])) {
1210 $actor = $child['author'];
1213 $actor = $object_actor;
1216 if (!empty($object['published'])) {
1217 $published = $object['published'];
1218 } elseif (!empty($child['published'])) {
1219 $published = $child['published'];
1221 $published = DateTimeFormat::utcNow();
1225 $activity['@context'] = $object['@context'] ?? ActivityPub::CONTEXT;
1226 unset($object['@context']);
1227 $activity['id'] = $object['id'];
1228 $activity['to'] = $object['to'] ?? [];
1229 $activity['cc'] = $object['cc'] ?? [];
1230 $activity['actor'] = $actor;
1231 $activity['object'] = $object;
1232 $activity['published'] = $published;
1233 $activity['type'] = 'Create';
1235 $ldactivity = JsonLD::compact($activity);
1237 $ldactivity['recursion-depth'] = !empty($child['recursion-depth']) ? $child['recursion-depth'] + 1 : 1;
1239 if (!empty($relay_actor)) {
1240 $ldactivity['thread-completion'] = $ldactivity['from-relay'] = Contact::getIdForURL($relay_actor);
1241 $ldactivity['completion-mode'] = Receiver::COMPLETION_RELAY;
1242 } elseif (!empty($child['thread-completion'])) {
1243 $ldactivity['thread-completion'] = $child['thread-completion'];
1244 $ldactivity['completion-mode'] = $child['completion-mode'] ?? Receiver::COMPLETION_NONE;
1246 $ldactivity['thread-completion'] = Contact::getIdForURL($actor);
1247 $ldactivity['completion-mode'] = $completion;
1250 if (!empty($child['type'])) {
1251 $ldactivity['thread-children-type'] = $child['type'];
1254 if (!empty($relay_actor) && !self::acceptIncomingMessage($ldactivity, $object['id'])) {
1258 ActivityPub\Receiver::processActivity($ldactivity, json_encode($activity), $uid, true, false, $signer);
1260 Logger::notice('Activity had been fetched and processed.', ['url' => $url, 'object' => $activity['id']]);
1262 return $activity['id'];
1266 * Test if incoming relay messages should be accepted
1268 * @param array $activity activity array
1269 * @param string $id object ID
1270 * @return boolean true if message is accepted
1272 private static function acceptIncomingMessage(array $activity, string $id): bool
1274 if (empty($activity['as:object'])) {
1275 Logger::info('No object field in activity - accepted', ['id' => $id]);
1279 $replyto = JsonLD::fetchElement($activity['as:object'], 'as:inReplyTo', '@id');
1280 $uriid = ItemURI::getIdByURI($replyto ?? '');
1281 if (Post::exists(['uri-id' => $uriid])) {
1282 Logger::info('Post is a reply to an existing post - accepted', ['id' => $id, 'uri-id' => $uriid, 'replyto' => $replyto]);
1286 $attributed_to = JsonLD::fetchElement($activity['as:object'], 'as:attributedTo', '@id');
1287 $authorid = Contact::getIdForURL($attributed_to);
1289 $body = HTML::toBBCode(JsonLD::fetchElement($activity['as:object'], 'as:content', '@value') ?? '');
1292 $tags = Receiver::processTags(JsonLD::fetchElementArray($activity['as:object'], 'as:tag') ?? []);
1293 if (!empty($tags)) {
1294 foreach ($tags as $tag) {
1295 if ($tag['type'] != 'Hashtag') {
1298 $messageTags[] = ltrim(mb_strtolower($tag['name']), '#');
1302 return Relay::isSolicitedPost($messageTags, $body, $authorid, $id, Protocol::ACTIVITYPUB);
1306 * perform a "follow" request
1308 * @param array $activity
1310 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1311 * @throws \ImagickException
1313 public static function followUser(array $activity)
1315 $uid = User::getIdForURL($activity['object_id']);
1320 $owner = User::getOwnerDataById($uid);
1321 if (empty($owner)) {
1325 $cid = Contact::getIdForURL($activity['actor'], $uid);
1327 self::switchContact($cid);
1328 Contact::update(['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
1332 'author-id' => Contact::getIdForURL($activity['actor']),
1333 'author-link' => $activity['actor'],
1336 // Ensure that the contact has got the right network type
1337 self::switchContact($item['author-id']);
1339 $result = Contact::addRelationship($owner, [], $item, false, $activity['content'] ?? '');
1340 if ($result === true) {
1341 ActivityPub\Transmitter::sendContactAccept($item['author-link'], $activity['id'], $owner['uid']);
1344 $cid = Contact::getIdForURL($activity['actor'], $uid);
1349 if ($result && DI::config()->get('system', 'transmit_pending_events') && ($owner['contact-type'] == Contact::TYPE_COMMUNITY)) {
1350 self::transmitPendingEvents($cid, $owner['uid']);
1353 if (empty($contact)) {
1354 Contact::update(['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
1356 Logger::notice('Follow user ' . $uid . ' from contact ' . $cid . ' with id ' . $activity['id']);
1357 Queue::remove($activity);
1361 * Transmit pending events to the new follower
1363 * @param integer $cid Contact id
1364 * @param integer $uid User id
1367 private static function transmitPendingEvents(int $cid, int $uid)
1369 $account = DBA::selectFirst('account-user-view', ['ap-inbox', 'ap-sharedinbox'], ['id' => $cid]);
1370 $inbox = $account['ap-sharedinbox'] ?: $account['ap-inbox'];
1372 $events = DBA::select('event', ['id'], ["`uid` = ? AND `start` > ? AND `type` != ?", $uid, DateTimeFormat::utcNow(), 'birthday']);
1373 while ($event = DBA::fetch($events)) {
1374 $post = Post::selectFirst(['id', 'uri-id', 'created'], ['event-id' => $event['id']]);
1378 if (DI::config()->get('system', 'bulk_delivery')) {
1379 Post\Delivery::add($post['uri-id'], $uid, $inbox, $post['created'], Delivery::POST, [$cid]);
1380 Worker::add(PRIORITY_HIGH, 'APDelivery', '', 0, $inbox, 0);
1382 Worker::add(PRIORITY_HIGH, 'APDelivery', Delivery::POST, $post['id'], $inbox, $uid, [$cid], $post['uri-id']);
1388 * Update the given profile
1390 * @param array $activity
1391 * @throws \Exception
1393 public static function updatePerson(array $activity)
1395 if (empty($activity['object_id'])) {
1399 Logger::info('Updating profile', ['object' => $activity['object_id']]);
1400 Contact::updateFromProbeByURL($activity['object_id']);
1401 Queue::remove($activity);
1405 * Delete the given profile
1407 * @param array $activity
1409 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1411 public static function deletePerson(array $activity)
1413 if (empty($activity['object_id']) || empty($activity['actor'])) {
1414 Logger::info('Empty object id or actor.');
1418 if ($activity['object_id'] != $activity['actor']) {
1419 Logger::info('Object id does not match actor.');
1423 $contacts = DBA::select('contact', ['id'], ['nurl' => Strings::normaliseLink($activity['object_id'])]);
1424 while ($contact = DBA::fetch($contacts)) {
1425 Contact::remove($contact['id']);
1427 DBA::close($contacts);
1429 Logger::info('Deleted contact', ['object' => $activity['object_id']]);
1430 Queue::remove($activity);
1434 * Blocks the user by the contact
1436 * @param array $activity
1438 * @throws \Exception
1440 public static function blockAccount(array $activity)
1442 $cid = Contact::getIdForURL($activity['actor']);
1447 $uid = User::getIdForURL($activity['object_id']);
1452 Contact\User::setIsBlocked($cid, $uid, true);
1454 Logger::info('Contact blocked user', ['contact' => $cid, 'user' => $uid]);
1455 Queue::remove($activity);
1459 * Unblocks the user by the contact
1461 * @param array $activity
1463 * @throws \Exception
1465 public static function unblockAccount(array $activity)
1467 $cid = Contact::getIdForURL($activity['actor']);
1472 $uid = User::getIdForURL($activity['object_object']);
1477 Contact\User::setIsBlocked($cid, $uid, false);
1479 Logger::info('Contact unblocked user', ['contact' => $cid, 'user' => $uid]);
1480 Queue::remove($activity);
1484 * Accept a follow request
1486 * @param array $activity
1487 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1488 * @throws \ImagickException
1490 public static function acceptFollowUser(array $activity)
1492 $uid = User::getIdForURL($activity['object_actor']);
1497 $cid = Contact::getIdForURL($activity['actor'], $uid);
1499 Logger::info('No contact found', ['actor' => $activity['actor']]);
1503 self::switchContact($cid);
1505 $fields = ['pending' => false];
1507 $contact = DBA::selectFirst('contact', ['rel'], ['id' => $cid]);
1508 if ($contact['rel'] == Contact::FOLLOWER) {
1509 $fields['rel'] = Contact::FRIEND;
1512 $condition = ['id' => $cid];
1513 Contact::update($fields, $condition);
1514 Logger::info('Accept contact request', ['contact' => $cid, 'user' => $uid]);
1515 Queue::remove($activity);
1519 * Reject a follow request
1521 * @param array $activity
1522 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1523 * @throws \ImagickException
1525 public static function rejectFollowUser(array $activity)
1527 $uid = User::getIdForURL($activity['object_actor']);
1532 $cid = Contact::getIdForURL($activity['actor'], $uid);
1534 Logger::info('No contact found', ['actor' => $activity['actor']]);
1538 self::switchContact($cid);
1540 $contact = Contact::getById($cid, ['rel']);
1541 if ($contact['rel'] == Contact::SHARING) {
1542 Contact::remove($cid);
1543 Logger::info('Rejected contact request - contact removed', ['contact' => $cid, 'user' => $uid]);
1544 } elseif ($contact['rel'] == Contact::FRIEND) {
1545 Contact::update(['rel' => Contact::FOLLOWER], ['id' => $cid]);
1547 Logger::info('Rejected contact request', ['contact' => $cid, 'user' => $uid]);
1549 Queue::remove($activity);
1553 * Undo activity like "like" or "dislike"
1555 * @param array $activity
1556 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1557 * @throws \ImagickException
1559 public static function undoActivity(array $activity)
1561 if (empty($activity['object_id'])) {
1565 if (empty($activity['object_actor'])) {
1569 $author_id = Contact::getIdForURL($activity['object_actor']);
1570 if (empty($author_id)) {
1574 Item::markForDeletion(['uri' => $activity['object_id'], 'author-id' => $author_id, 'gravity' => GRAVITY_ACTIVITY]);
1575 Queue::remove($activity);
1579 * Activity to remove a follower
1581 * @param array $activity
1582 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1583 * @throws \ImagickException
1585 public static function undoFollowUser(array $activity)
1587 $uid = User::getIdForURL($activity['object_object']);
1592 $owner = User::getOwnerDataById($uid);
1593 if (empty($owner)) {
1597 $cid = Contact::getIdForURL($activity['actor'], $uid);
1599 Logger::info('No contact found', ['actor' => $activity['actor']]);
1603 self::switchContact($cid);
1605 $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
1606 if (!DBA::isResult($contact)) {
1610 Contact::removeFollower($contact);
1611 Logger::info('Undo following request', ['contact' => $cid, 'user' => $uid]);
1612 Queue::remove($activity);
1616 * Switches a contact to AP if needed
1618 * @param integer $cid Contact ID
1620 * @throws \Exception
1622 private static function switchContact(int $cid)
1624 $contact = DBA::selectFirst('contact', ['network', 'url'], ['id' => $cid]);
1625 if (!DBA::isResult($contact) || in_array($contact['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN]) || Contact::isLocal($contact['url'])) {
1629 Logger::info('Change existing contact', ['cid' => $cid, 'previous' => $contact['network']]);
1630 Contact::updateFromProbe($cid);
1634 * Collects implicit mentions like:
1635 * - the author of the parent item
1636 * - all the mentioned conversants in the parent item
1638 * @param array $parent Item array with at least ['id', 'author-link', 'alias']
1640 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1642 private static function getImplicitMentionList(array $parent): array
1644 $parent_terms = Tag::getByURIId($parent['uri-id'], [Tag::MENTION, Tag::IMPLICIT_MENTION, Tag::EXCLUSIVE_MENTION]);
1646 $parent_author = Contact::getByURL($parent['author-link'], false, ['url', 'nurl', 'alias']);
1648 $implicit_mentions = [];
1649 if (empty($parent_author['url'])) {
1650 Logger::notice('Author public contact unknown.', ['author-link' => $parent['author-link'], 'parent-id' => $parent['id']]);
1652 $implicit_mentions[] = $parent_author['url'];
1653 $implicit_mentions[] = $parent_author['nurl'];
1654 $implicit_mentions[] = $parent_author['alias'];
1657 if (!empty($parent['alias'])) {
1658 $implicit_mentions[] = $parent['alias'];
1661 foreach ($parent_terms as $term) {
1662 $contact = Contact::getByURL($term['url'], false, ['url', 'nurl', 'alias']);
1663 if (!empty($contact['url'])) {
1664 $implicit_mentions[] = $contact['url'];
1665 $implicit_mentions[] = $contact['nurl'];
1666 $implicit_mentions[] = $contact['alias'];
1670 return $implicit_mentions;
1674 * Strips from the body prepended implicit mentions
1676 * @param string $body
1677 * @param array $parent
1680 private static function removeImplicitMentionsFromBody(string $body, array $parent): string
1682 if (DI::config()->get('system', 'disable_implicit_mentions')) {
1686 $potential_mentions = self::getImplicitMentionList($parent);
1688 $kept_mentions = [];
1690 // Extract one prepended mention at a time from the body
1691 while(preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $body, $matches)) {
1692 if (!in_array($matches[2], $potential_mentions)) {
1693 $kept_mentions[] = $matches[1];
1696 $body = $matches[3];
1699 // Re-appending the kept mentions to the body after extraction
1700 $kept_mentions[] = $body;
1702 return implode('', $kept_mentions);
1706 * Adds links to string mentions
1708 * @param string $body
1709 * @param array $tags
1712 protected static function addMentionLinks(string $body, array $tags): string
1714 // This prevents links to be added again to Pleroma-style mention links
1715 $body = self::normalizeMentionLinks($body);
1717 $body = BBCode::performWithEscapedTags($body, ['url'], function ($body) use ($tags) {
1718 foreach ($tags as $tag) {
1719 if (empty($tag['name']) || empty($tag['type']) || empty($tag['href']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
1723 $hash = substr($tag['name'], 0, 1);
1724 $name = substr($tag['name'], 1);
1725 if (!in_array($hash, Tag::TAG_CHARACTER)) {
1727 $name = $tag['name'];
1730 $body = str_replace($tag['name'], $hash . '[url=' . $tag['href'] . ']' . $name . '[/url]', $body);