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 $parent = Post::selectFirst(['uri-id'], ['uri' => $activity['object_id']]);
555 if (empty($parent['uri-id'])) {
556 if (self::fetchMissingActivity($activity['object_id'], $activity, '', Receiver::COMPLETION_AUTO)) {
557 $parent = Post::selectFirst(['uri-id'], ['uri' => $activity['object_id']]);
561 if (!empty($parent['uri-id'])) {
562 return $parent['uri-id'];
569 * Add a post to the "Featured" collection
571 * @param array $activity
573 public static function addToFeaturedCollection(array $activity)
575 $uriid = self::getUriIdForFeaturedCollection($activity);
580 Logger::debug('Add post to featured collection', ['uri-id' => $uriid]);
582 Post\Collection::add($uriid, Post\Collection::FEATURED);
583 Queue::remove($activity);
587 * Remove a post to the "Featured" collection
589 * @param array $activity
591 public static function removeFromFeaturedCollection(array $activity)
593 $uriid = self::getUriIdForFeaturedCollection($activity);
598 Logger::debug('Remove post from featured collection', ['uri-id' => $uriid]);
600 Post\Collection::remove($uriid, Post\Collection::FEATURED);
601 Queue::remove($activity);
607 * @param array $activity Activity array
610 * @return int event id
613 public static function createEvent(array $activity, array $item): int
615 $event['summary'] = HTML::toBBCode($activity['name'] ?: $activity['summary']);
616 $event['desc'] = HTML::toBBCode($activity['content']);
617 if (!empty($activity['start-time'])) {
618 $event['start'] = DateTimeFormat::utc($activity['start-time']);
620 if (!empty($activity['end-time'])) {
621 $event['finish'] = DateTimeFormat::utc($activity['end-time']);
623 $event['nofinish'] = empty($event['finish']);
624 $event['location'] = $activity['location'];
625 $event['cid'] = $item['contact-id'];
626 $event['uid'] = $item['uid'];
627 $event['uri'] = $item['uri'];
628 $event['edited'] = $item['edited'];
629 $event['private'] = $item['private'];
630 $event['guid'] = $item['guid'];
631 $event['plink'] = $item['plink'];
632 $event['network'] = $item['network'];
633 $event['protocol'] = $item['protocol'];
634 $event['direction'] = $item['direction'];
635 $event['source'] = $item['source'];
637 $ev = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
638 if (DBA::isResult($ev)) {
639 $event['id'] = $ev['id'];
642 $event_id = Event::store($event);
644 Logger::info('Event was stored', ['id' => $event_id]);
650 * Process the content
652 * @param array $activity Activity array
654 * @return array|bool Returns the item array or false if there was an unexpected occurrence
657 private static function processContent(array $activity, array $item)
659 if (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/markdown')) {
660 $item['title'] = strip_tags($activity['name']);
661 $content = Markdown::toBBCode($activity['content']);
662 } elseif (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/bbcode')) {
663 $item['title'] = $activity['name'];
664 $content = $activity['content'];
666 // By default assume "text/html"
667 $item['title'] = HTML::toBBCode($activity['name'] ?? '');
668 $content = HTML::toBBCode($activity['content'] ?? '');
671 $item['title'] = trim(BBCode::toPlaintext($item['title']));
673 if (!empty($activity['languages'])) {
674 $item['language'] = self::processLanguages($activity['languages']);
677 if (!empty($activity['emojis'])) {
678 $content = self::replaceEmojis($item['uri-id'], $content, $activity['emojis']);
681 $content = self::addMentionLinks($content, $activity['tags']);
683 if (!empty($activity['source'])) {
684 $item['body'] = $activity['source'];
685 $item['raw-body'] = $content;
686 $item['body'] = Item::improveSharedDataInBody($item);
688 $parent_uri = $item['parent-uri'] ?? $item['thr-parent'];
689 if (empty($activity['directmessage']) && ($parent_uri != $item['uri']) && ($item['gravity'] == GRAVITY_COMMENT)) {
690 $parent = Post::selectFirst(['id', 'uri-id', 'private', 'author-link', 'alias'], ['uri' => $parent_uri]);
691 if (!DBA::isResult($parent)) {
692 Logger::warning('Unknown parent item.', ['uri' => $parent_uri]);
695 if (($item['private'] == Item::PRIVATE) && ($parent['private'] != Item::PRIVATE)) {
696 Logger::warning('Item is private but the parent is not. Dropping.', ['item-uri' => $item['uri'], 'thr-parent' => $item['thr-parent']]);
700 $content = self::removeImplicitMentionsFromBody($content, $parent);
702 $item['content-warning'] = HTML::toBBCode($activity['summary'] ?? '');
703 $item['raw-body'] = $item['body'] = $content;
706 self::storeFromBody($item);
707 self::storeTags($item['uri-id'], $activity['tags']);
709 self::storeReceivers($item['uri-id'], $activity['receiver_urls'] ?? []);
711 $item['location'] = $activity['location'];
713 if (!empty($activity['latitude']) && !empty($activity['longitude'])) {
714 $item['coord'] = $activity['latitude'] . ' ' . $activity['longitude'];
717 $item['app'] = $activity['generator'];
723 * Store hashtags and mentions
727 private static function storeFromBody(array $item)
729 // Make sure to delete all existing tags (can happen when called via the update functionality)
730 DBA::delete('post-tag', ['uri-id' => $item['uri-id']]);
732 Tag::storeFromBody($item['uri-id'], $item['body'], '@!');
736 * Generate a GUID out of an URL of an ActivityPub post.
738 * @param string $url message URL
739 * @return string with GUID
741 private static function getGUIDByURL(string $url): string
743 $parsed = parse_url($url);
745 $host_hash = hash('crc32', $parsed['host']);
747 unset($parsed["scheme"]);
748 unset($parsed["host"]);
750 $path = implode("/", $parsed);
752 return $host_hash . '-'. hash('fnv164', $path) . '-'. hash('joaat', $path);
756 * Checks if an incoming message is wanted
758 * @param array $activity
760 * @return boolean Is the message wanted?
762 private static function isSolicitedMessage(array $activity, array $item): bool
764 // The checks are split to improve the support when searching why a message was accepted.
765 if (count($activity['receiver']) != 1) {
766 // The message has more than one receiver, so it is wanted.
767 Logger::debug('Message has got several receivers - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
771 if ($item['private'] == Item::PRIVATE) {
772 // We only look at public posts here. Private posts are expected to be intentionally posted to the single receiver.
773 Logger::debug('Message is private - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
777 if (!empty($activity['from-relay'])) {
778 // We check relay posts at another place. When it arrived here, the message is already checked.
779 Logger::debug('Message is a relay post that is already checked - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
783 if (in_array($activity['completion-mode'] ?? Receiver::COMPLETION_NONE, [Receiver::COMPLETION_MANUAL, Receiver::COMPLETION_ANNOUCE])) {
784 // Manual completions and completions caused by reshares are allowed without any further checks.
785 Logger::debug('Message is in completion mode - accepted', ['mode' => $activity['completion-mode'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
789 if ($item['gravity'] != GRAVITY_PARENT) {
790 // We cannot reliably check at this point if a comment or activity belongs to an accepted post or needs to be fetched
791 // This can possibly be improved in the future.
792 Logger::debug('Message is no parent - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
796 $tags = array_column(Tag::getByURIId($item['uri-id'], [Tag::HASHTAG]), 'name');
797 if (Relay::isSolicitedPost($tags, $item['body'], $item['author-id'], $item['uri'], Protocol::ACTIVITYPUB)) {
798 Logger::debug('Post is accepted because of the relay settings', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
806 * Creates an item post
808 * @param array $activity Activity data
809 * @param array $item item array
810 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
811 * @throws \ImagickException
813 public static function postItem(array $activity, array $item)
821 ksort($activity['receiver']);
823 if (!self::isSolicitedMessage($activity, $item)) {
824 DBA::delete('item-uri', ['id' => $item['uri-id']]);
828 foreach ($activity['receiver'] as $receiver) {
829 if ($receiver == -1) {
833 $item['uid'] = $receiver;
835 $type = $activity['reception_type'][$receiver] ?? Receiver::TARGET_UNKNOWN;
837 case Receiver::TARGET_TO:
838 $item['post-reason'] = Item::PR_TO;
840 case Receiver::TARGET_CC:
841 $item['post-reason'] = Item::PR_CC;
843 case Receiver::TARGET_BTO:
844 $item['post-reason'] = Item::PR_BTO;
846 case Receiver::TARGET_BCC:
847 $item['post-reason'] = Item::PR_BCC;
849 case Receiver::TARGET_FOLLOWER:
850 $item['post-reason'] = Item::PR_FOLLOWER;
852 case Receiver::TARGET_ANSWER:
853 $item['post-reason'] = Item::PR_COMMENT;
855 case Receiver::TARGET_GLOBAL:
856 $item['post-reason'] = Item::PR_GLOBAL;
859 $item['post-reason'] = Item::PR_NONE;
862 if (!empty($activity['from-relay'])) {
863 $item['post-reason'] = Item::PR_RELAY;
864 } elseif (!empty($activity['thread-completion'])) {
865 $item['post-reason'] = Item::PR_FETCHED;
868 if ($item['isForum'] ?? false) {
869 $item['contact-id'] = Contact::getIdForURL($activity['actor'], $receiver);
871 $item['contact-id'] = Contact::getIdForURL($activity['author'], $receiver);
874 if (($receiver != 0) && empty($item['contact-id'])) {
875 $item['contact-id'] = Contact::getIdForURL($activity['author']);
878 if (!empty($activity['directmessage'])) {
879 self::postMail($activity, $item);
883 if (!($item['isForum'] ?? false) && ($receiver != 0) && ($item['gravity'] == GRAVITY_PARENT) && !Contact::isSharingByURL($activity['author'], $receiver)) {
884 if ($item['post-reason'] == Item::PR_BCC) {
885 Logger::info('Top level post via BCC from a non sharer, ignoring', ['uid' => $receiver, 'contact' => $item['contact-id']]);
890 !empty($activity['thread-children-type'])
891 && in_array($activity['thread-children-type'], Receiver::ACTIVITY_TYPES)
892 && DI::pConfig()->get($receiver, 'system', 'accept_only_sharer') != Item::COMPLETION_LIKE
894 Logger::info('Top level post from thread completion from a non sharer had been initiated via an activity, ignoring',
895 ['type' => $activity['thread-children-type'], 'user' => $item['uid'], 'causer' => $item['causer-link'], 'author' => $activity['author'], 'url' => $item['uri']]);
902 if ($receiver != 0) {
903 $user = User::getById($receiver, ['account-type']);
904 if (!empty($user['account-type'])) {
905 $is_forum = ($user['account-type'] == User::ACCOUNT_TYPE_COMMUNITY);
909 if (!$is_forum && DI::pConfig()->get($receiver, 'system', 'accept_only_sharer') == Item::COMPLETION_NONE && ($receiver != 0) && ($item['gravity'] == GRAVITY_PARENT)) {
910 $skip = !Contact::isSharingByURL($activity['author'], $receiver);
912 if ($skip && (($activity['type'] == 'as:Announce') || ($item['isForum'] ?? false))) {
913 $skip = !Contact::isSharingByURL($activity['actor'], $receiver);
917 Logger::info('Skipping post', ['uid' => $receiver, 'url' => $item['uri']]);
921 Logger::info('Accepting post', ['uid' => $receiver, 'url' => $item['uri']]);
924 if (($item['gravity'] != GRAVITY_ACTIVITY) && ($activity['object_type'] == 'as:Event')) {
925 $event_id = self::createEvent($activity, $item);
927 $item = Event::getItemArrayForImportedId($event_id, $item);
930 $item_id = Item::insert($item);
932 Logger::info('Item insertion successful', ['user' => $item['uid'], 'item_id' => $item_id]);
935 Logger::notice('Item insertion aborted', ['uri' => $item['uri'], 'uid' => $item['uid']]);
938 if ($item['uid'] == 0) {
944 Queue::remove($activity);
945 Queue::processReplyByUri($item['uri']);
948 // Store send a follow request for every reshare - but only when the item had been stored
949 if ($stored && ($item['private'] != Item::PRIVATE) && ($item['gravity'] == GRAVITY_PARENT) && !empty($item['author-link']) && ($item['author-link'] != $item['owner-link'])) {
950 $author = APContact::getByURL($item['owner-link'], false);
951 // We send automatic follow requests for reshared messages. (We don't need though for forum posts)
952 if ($author['type'] != 'Group') {
953 Logger::info('Send follow request', ['uri' => $item['uri'], 'stored' => $stored, 'to' => $item['author-link']]);
954 ActivityPub\Transmitter::sendFollowObject($item['uri'], $item['author-link']);
960 * Store tags and mentions into the tag table
962 * @param integer $uriid
965 private static function storeTags(int $uriid, array $tags = null)
967 foreach ($tags as $tag) {
968 if (empty($tag['name']) || empty($tag['type']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
972 $hash = substr($tag['name'], 0, 1);
974 if ($tag['type'] == 'Mention') {
975 if (in_array($hash, [Tag::TAG_CHARACTER[Tag::MENTION],
976 Tag::TAG_CHARACTER[Tag::EXCLUSIVE_MENTION],
977 Tag::TAG_CHARACTER[Tag::IMPLICIT_MENTION]])) {
978 $tag['name'] = substr($tag['name'], 1);
980 $type = Tag::IMPLICIT_MENTION;
982 if (!empty($tag['href'])) {
983 $apcontact = APContact::getByURL($tag['href']);
984 if (!empty($apcontact['name']) || !empty($apcontact['nick'])) {
985 $tag['name'] = $apcontact['name'] ?: $apcontact['nick'];
988 } elseif ($tag['type'] == 'Hashtag') {
989 if ($hash == Tag::TAG_CHARACTER[Tag::HASHTAG]) {
990 $tag['name'] = substr($tag['name'], 1);
992 $type = Tag::HASHTAG;
995 if (empty($tag['name'])) {
999 Tag::store($uriid, $type, $tag['name'], $tag['href']);
1003 public static function storeReceivers(int $uriid, array $receivers)
1005 foreach (['as:to' => Tag::TO, 'as:cc' => Tag::CC, 'as:bto' => Tag::BTO, 'as:bcc' => Tag::BCC] as $element => $type) {
1006 if (!empty($receivers[$element])) {
1007 foreach ($receivers[$element] as $receiver) {
1008 if ($receiver == ActivityPub::PUBLIC_COLLECTION) {
1009 $name = Receiver::PUBLIC_COLLECTION;
1011 $name = trim(parse_url($receiver, PHP_URL_PATH), '/');
1014 $target = Tag::getTargetType($receiver);
1015 Logger::debug('Got target type', ['type' => $target, 'url' => $receiver]);
1016 Tag::store($uriid, $type, $name, $receiver, $target);
1023 * Creates an mail post
1025 * @param array $activity Activity data
1026 * @param array $item item array
1027 * @return int|bool New mail table row id or false on error
1028 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1030 private static function postMail(array $activity, array $item)
1032 if (($item['gravity'] != GRAVITY_PARENT) && !DBA::exists('mail', ['uri' => $item['thr-parent'], 'uid' => $item['uid']])) {
1033 Logger::info('Parent not found, mail will be discarded.', ['uid' => $item['uid'], 'uri' => $item['thr-parent']]);
1037 Logger::info('Direct Message', $item);
1040 $msg['uid'] = $item['uid'];
1042 $msg['contact-id'] = $item['contact-id'];
1044 $contact = Contact::getById($item['contact-id'], ['name', 'url', 'photo']);
1045 $msg['from-name'] = $contact['name'];
1046 $msg['from-url'] = $contact['url'];
1047 $msg['from-photo'] = $contact['photo'];
1049 $msg['uri'] = $item['uri'];
1050 $msg['created'] = $item['created'];
1052 $parent = DBA::selectFirst('mail', ['parent-uri', 'title'], ['uri' => $item['thr-parent']]);
1053 if (DBA::isResult($parent)) {
1054 $msg['parent-uri'] = $parent['parent-uri'];
1055 $msg['title'] = $parent['title'];
1057 $msg['parent-uri'] = $item['thr-parent'];
1059 if (!empty($item['title'])) {
1060 $msg['title'] = $item['title'];
1061 } elseif (!empty($item['content-warning'])) {
1062 $msg['title'] = $item['content-warning'];
1064 // Trying to generate a title out of the body
1065 $title = $item['body'];
1067 while (preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $title, $matches)) {
1068 $title = $matches[3];
1071 $title = trim(BBCode::toPlaintext($title));
1073 if (strlen($title) > 20) {
1074 $title = substr($title, 0, 20) . '...';
1077 $msg['title'] = $title;
1080 $msg['body'] = $item['body'];
1082 return Mail::insert($msg);
1086 * Fetch featured posts from a contact with the given url
1088 * @param string $url
1091 public static function fetchFeaturedPosts(string $url)
1093 Logger::info('Fetch featured posts', ['contact' => $url]);
1095 $apcontact = APContact::getByURL($url);
1096 if (empty($apcontact['featured'])) {
1097 Logger::info('Contact does not have a featured collection', ['contact' => $url]);
1101 $pcid = Contact::getIdForURL($url, 0, false);
1103 Logger::info('Contact not found', ['contact' => $url]);
1107 $posts = Post\Collection::selectToArrayForContact($pcid, Post\Collection::FEATURED);
1108 if (!empty($posts)) {
1109 $old_featured = array_column($posts, 'uri-id');
1114 $featured = ActivityPub::fetchItems($apcontact['featured']);
1115 if (empty($featured)) {
1116 Logger::info('Contact does not have featured posts', ['contact' => $url]);
1118 foreach ($old_featured as $uri_id) {
1119 Post\Collection::remove($uri_id, Post\Collection::FEATURED);
1120 Logger::debug('Removed no longer featured post', ['uri-id' => $uri_id, 'contact' => $url]);
1128 foreach ($featured as $post) {
1129 if (empty($post['id'])) {
1132 $id = Item::fetchByLink($post['id']);
1134 $item = Post::selectFirst(['uri-id', 'featured'], ['id' => $id]);
1135 if (!empty($item['uri-id'])) {
1136 if (!$item['featured']) {
1137 Post\Collection::add($item['uri-id'], Post\Collection::FEATURED);
1138 Logger::debug('Added featured post', ['uri-id' => $item['uri-id'], 'contact' => $url]);
1141 Logger::debug('Post already had been featured', ['uri-id' => $item['uri-id'], 'contact' => $url]);
1145 $index = array_search($item['uri-id'], $old_featured);
1146 if (!($index === false)) {
1147 unset($old_featured[$index]);
1153 foreach ($old_featured as $uri_id) {
1154 Post\Collection::remove($uri_id, Post\Collection::FEATURED);
1155 Logger::debug('Removed no longer featured post', ['uri-id' => $uri_id, 'contact' => $url]);
1158 Logger::info('Fetched featured posts', ['new' => $new, 'old' => $old, 'contact' => $url]);
1162 * Fetches missing posts
1164 * @param string $url message URL
1165 * @param array $child activity array with the child of this message
1166 * @param string $relay_actor Relay actor
1167 * @param int $completion Completion mode, see Receiver::COMPLETION_*
1168 * @return string fetched message URL
1169 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1170 * @throws \ImagickException
1172 public static function fetchMissingActivity(string $url, array $child = [], string $relay_actor = '', int $completion = Receiver::COMPLETION_MANUAL): string
1174 if (!empty($child['receiver'])) {
1175 $uid = ActivityPub\Receiver::getFirstUserFromReceivers($child['receiver']);
1180 $object = ActivityPub::fetchContent($url, $uid);
1181 if (empty($object)) {
1182 Logger::notice('Activity was not fetchable, aborting.', ['url' => $url, 'uid' => $uid]);
1186 if (empty($object['id'])) {
1187 Logger::notice('Activity has got not id, aborting. ', ['url' => $url, 'object' => $object]);
1193 if (!empty($object['attributedTo'])) {
1194 $attributed_to = $object['attributedTo'];
1195 if (is_array($attributed_to)) {
1196 $compacted = JsonLD::compact($object);
1197 $attributed_to = JsonLD::fetchElement($compacted, 'as:attributedTo', '@id');
1199 $signer[] = $attributed_to;
1202 if (!empty($object['actor'])) {
1203 $object_actor = $object['actor'];
1204 } elseif (!empty($attributed_to)) {
1205 $object_actor = $attributed_to;
1211 $signer[] = $object_actor;
1213 if (!empty($child['author'])) {
1214 $actor = $child['author'];
1217 $actor = $object_actor;
1220 if (!empty($object['published'])) {
1221 $published = $object['published'];
1222 } elseif (!empty($child['published'])) {
1223 $published = $child['published'];
1225 $published = DateTimeFormat::utcNow();
1229 $activity['@context'] = $object['@context'] ?? ActivityPub::CONTEXT;
1230 unset($object['@context']);
1231 $activity['id'] = $object['id'];
1232 $activity['to'] = $object['to'] ?? [];
1233 $activity['cc'] = $object['cc'] ?? [];
1234 $activity['actor'] = $actor;
1235 $activity['object'] = $object;
1236 $activity['published'] = $published;
1237 $activity['type'] = 'Create';
1239 $ldactivity = JsonLD::compact($activity);
1241 $ldactivity['recursion-depth'] = !empty($child['recursion-depth']) ? $child['recursion-depth'] + 1 : 1;
1243 if (!empty($relay_actor)) {
1244 $ldactivity['thread-completion'] = $ldactivity['from-relay'] = Contact::getIdForURL($relay_actor);
1245 $ldactivity['completion-mode'] = Receiver::COMPLETION_RELAY;
1246 } elseif (!empty($child['thread-completion'])) {
1247 $ldactivity['thread-completion'] = $child['thread-completion'];
1248 $ldactivity['completion-mode'] = $child['completion-mode'] ?? Receiver::COMPLETION_NONE;
1250 $ldactivity['thread-completion'] = Contact::getIdForURL($actor);
1251 $ldactivity['completion-mode'] = $completion;
1254 if (!empty($child['type'])) {
1255 $ldactivity['thread-children-type'] = $child['type'];
1258 if (!empty($relay_actor) && !self::acceptIncomingMessage($ldactivity, $object['id'])) {
1262 ActivityPub\Receiver::processActivity($ldactivity, json_encode($activity), $uid, true, false, $signer);
1264 Logger::notice('Activity had been fetched and processed.', ['url' => $url, 'object' => $activity['id']]);
1266 return $activity['id'];
1270 * Test if incoming relay messages should be accepted
1272 * @param array $activity activity array
1273 * @param string $id object ID
1274 * @return boolean true if message is accepted
1276 private static function acceptIncomingMessage(array $activity, string $id): bool
1278 if (empty($activity['as:object'])) {
1279 Logger::info('No object field in activity - accepted', ['id' => $id]);
1283 $replyto = JsonLD::fetchElement($activity['as:object'], 'as:inReplyTo', '@id');
1284 $uriid = ItemURI::getIdByURI($replyto ?? '');
1285 if (Post::exists(['uri-id' => $uriid])) {
1286 Logger::info('Post is a reply to an existing post - accepted', ['id' => $id, 'uri-id' => $uriid, 'replyto' => $replyto]);
1290 $attributed_to = JsonLD::fetchElement($activity['as:object'], 'as:attributedTo', '@id');
1291 $authorid = Contact::getIdForURL($attributed_to);
1293 $body = HTML::toBBCode(JsonLD::fetchElement($activity['as:object'], 'as:content', '@value') ?? '');
1296 $tags = Receiver::processTags(JsonLD::fetchElementArray($activity['as:object'], 'as:tag') ?? []);
1297 if (!empty($tags)) {
1298 foreach ($tags as $tag) {
1299 if ($tag['type'] != 'Hashtag') {
1302 $messageTags[] = ltrim(mb_strtolower($tag['name']), '#');
1306 return Relay::isSolicitedPost($messageTags, $body, $authorid, $id, Protocol::ACTIVITYPUB);
1310 * perform a "follow" request
1312 * @param array $activity
1314 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1315 * @throws \ImagickException
1317 public static function followUser(array $activity)
1319 $uid = User::getIdForURL($activity['object_id']);
1324 $owner = User::getOwnerDataById($uid);
1325 if (empty($owner)) {
1329 $cid = Contact::getIdForURL($activity['actor'], $uid);
1331 self::switchContact($cid);
1332 Contact::update(['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
1336 'author-id' => Contact::getIdForURL($activity['actor']),
1337 'author-link' => $activity['actor'],
1340 // Ensure that the contact has got the right network type
1341 self::switchContact($item['author-id']);
1343 $result = Contact::addRelationship($owner, [], $item, false, $activity['content'] ?? '');
1344 if ($result === true) {
1345 ActivityPub\Transmitter::sendContactAccept($item['author-link'], $activity['id'], $owner['uid']);
1348 $cid = Contact::getIdForURL($activity['actor'], $uid);
1353 if ($result && DI::config()->get('system', 'transmit_pending_events') && ($owner['contact-type'] == Contact::TYPE_COMMUNITY)) {
1354 self::transmitPendingEvents($cid, $owner['uid']);
1357 if (empty($contact)) {
1358 Contact::update(['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
1360 Logger::notice('Follow user ' . $uid . ' from contact ' . $cid . ' with id ' . $activity['id']);
1361 Queue::remove($activity);
1365 * Transmit pending events to the new follower
1367 * @param integer $cid Contact id
1368 * @param integer $uid User id
1371 private static function transmitPendingEvents(int $cid, int $uid)
1373 $account = DBA::selectFirst('account-user-view', ['ap-inbox', 'ap-sharedinbox'], ['id' => $cid]);
1374 $inbox = $account['ap-sharedinbox'] ?: $account['ap-inbox'];
1376 $events = DBA::select('event', ['id'], ["`uid` = ? AND `start` > ? AND `type` != ?", $uid, DateTimeFormat::utcNow(), 'birthday']);
1377 while ($event = DBA::fetch($events)) {
1378 $post = Post::selectFirst(['id', 'uri-id', 'created'], ['event-id' => $event['id']]);
1382 if (DI::config()->get('system', 'bulk_delivery')) {
1383 Post\Delivery::add($post['uri-id'], $uid, $inbox, $post['created'], Delivery::POST, [$cid]);
1384 Worker::add(PRIORITY_HIGH, 'APDelivery', '', 0, $inbox, 0);
1386 Worker::add(PRIORITY_HIGH, 'APDelivery', Delivery::POST, $post['id'], $inbox, $uid, [$cid], $post['uri-id']);
1392 * Update the given profile
1394 * @param array $activity
1395 * @throws \Exception
1397 public static function updatePerson(array $activity)
1399 if (empty($activity['object_id'])) {
1403 Logger::info('Updating profile', ['object' => $activity['object_id']]);
1404 Contact::updateFromProbeByURL($activity['object_id']);
1405 Queue::remove($activity);
1409 * Delete the given profile
1411 * @param array $activity
1413 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1415 public static function deletePerson(array $activity)
1417 if (empty($activity['object_id']) || empty($activity['actor'])) {
1418 Logger::info('Empty object id or actor.');
1422 if ($activity['object_id'] != $activity['actor']) {
1423 Logger::info('Object id does not match actor.');
1427 $contacts = DBA::select('contact', ['id'], ['nurl' => Strings::normaliseLink($activity['object_id'])]);
1428 while ($contact = DBA::fetch($contacts)) {
1429 Contact::remove($contact['id']);
1431 DBA::close($contacts);
1433 Logger::info('Deleted contact', ['object' => $activity['object_id']]);
1434 Queue::remove($activity);
1438 * Blocks the user by the contact
1440 * @param array $activity
1442 * @throws \Exception
1444 public static function blockAccount(array $activity)
1446 $cid = Contact::getIdForURL($activity['actor']);
1451 $uid = User::getIdForURL($activity['object_id']);
1456 Contact\User::setIsBlocked($cid, $uid, true);
1458 Logger::info('Contact blocked user', ['contact' => $cid, 'user' => $uid]);
1459 Queue::remove($activity);
1463 * Unblocks the user by the contact
1465 * @param array $activity
1467 * @throws \Exception
1469 public static function unblockAccount(array $activity)
1471 $cid = Contact::getIdForURL($activity['actor']);
1476 $uid = User::getIdForURL($activity['object_object']);
1481 Contact\User::setIsBlocked($cid, $uid, false);
1483 Logger::info('Contact unblocked user', ['contact' => $cid, 'user' => $uid]);
1484 Queue::remove($activity);
1488 * Accept a follow request
1490 * @param array $activity
1491 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1492 * @throws \ImagickException
1494 public static function acceptFollowUser(array $activity)
1496 $uid = User::getIdForURL($activity['object_actor']);
1501 $cid = Contact::getIdForURL($activity['actor'], $uid);
1503 Logger::info('No contact found', ['actor' => $activity['actor']]);
1507 self::switchContact($cid);
1509 $fields = ['pending' => false];
1511 $contact = DBA::selectFirst('contact', ['rel'], ['id' => $cid]);
1512 if ($contact['rel'] == Contact::FOLLOWER) {
1513 $fields['rel'] = Contact::FRIEND;
1516 $condition = ['id' => $cid];
1517 Contact::update($fields, $condition);
1518 Logger::info('Accept contact request', ['contact' => $cid, 'user' => $uid]);
1519 Queue::remove($activity);
1523 * Reject a follow request
1525 * @param array $activity
1526 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1527 * @throws \ImagickException
1529 public static function rejectFollowUser(array $activity)
1531 $uid = User::getIdForURL($activity['object_actor']);
1536 $cid = Contact::getIdForURL($activity['actor'], $uid);
1538 Logger::info('No contact found', ['actor' => $activity['actor']]);
1542 self::switchContact($cid);
1544 $contact = Contact::getById($cid, ['rel']);
1545 if ($contact['rel'] == Contact::SHARING) {
1546 Contact::remove($cid);
1547 Logger::info('Rejected contact request - contact removed', ['contact' => $cid, 'user' => $uid]);
1548 } elseif ($contact['rel'] == Contact::FRIEND) {
1549 Contact::update(['rel' => Contact::FOLLOWER], ['id' => $cid]);
1551 Logger::info('Rejected contact request', ['contact' => $cid, 'user' => $uid]);
1553 Queue::remove($activity);
1557 * Undo activity like "like" or "dislike"
1559 * @param array $activity
1560 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1561 * @throws \ImagickException
1563 public static function undoActivity(array $activity)
1565 if (empty($activity['object_id'])) {
1569 if (empty($activity['object_actor'])) {
1573 $author_id = Contact::getIdForURL($activity['object_actor']);
1574 if (empty($author_id)) {
1578 Item::markForDeletion(['uri' => $activity['object_id'], 'author-id' => $author_id, 'gravity' => GRAVITY_ACTIVITY]);
1579 Queue::remove($activity);
1583 * Activity to remove a follower
1585 * @param array $activity
1586 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1587 * @throws \ImagickException
1589 public static function undoFollowUser(array $activity)
1591 $uid = User::getIdForURL($activity['object_object']);
1596 $owner = User::getOwnerDataById($uid);
1597 if (empty($owner)) {
1601 $cid = Contact::getIdForURL($activity['actor'], $uid);
1603 Logger::info('No contact found', ['actor' => $activity['actor']]);
1607 self::switchContact($cid);
1609 $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
1610 if (!DBA::isResult($contact)) {
1614 Contact::removeFollower($contact);
1615 Logger::info('Undo following request', ['contact' => $cid, 'user' => $uid]);
1616 Queue::remove($activity);
1620 * Switches a contact to AP if needed
1622 * @param integer $cid Contact ID
1624 * @throws \Exception
1626 private static function switchContact(int $cid)
1628 $contact = DBA::selectFirst('contact', ['network', 'url'], ['id' => $cid]);
1629 if (!DBA::isResult($contact) || in_array($contact['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN]) || Contact::isLocal($contact['url'])) {
1633 Logger::info('Change existing contact', ['cid' => $cid, 'previous' => $contact['network']]);
1634 Contact::updateFromProbe($cid);
1638 * Collects implicit mentions like:
1639 * - the author of the parent item
1640 * - all the mentioned conversants in the parent item
1642 * @param array $parent Item array with at least ['id', 'author-link', 'alias']
1644 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1646 private static function getImplicitMentionList(array $parent): array
1648 $parent_terms = Tag::getByURIId($parent['uri-id'], [Tag::MENTION, Tag::IMPLICIT_MENTION, Tag::EXCLUSIVE_MENTION]);
1650 $parent_author = Contact::getByURL($parent['author-link'], false, ['url', 'nurl', 'alias']);
1652 $implicit_mentions = [];
1653 if (empty($parent_author['url'])) {
1654 Logger::notice('Author public contact unknown.', ['author-link' => $parent['author-link'], 'parent-id' => $parent['id']]);
1656 $implicit_mentions[] = $parent_author['url'];
1657 $implicit_mentions[] = $parent_author['nurl'];
1658 $implicit_mentions[] = $parent_author['alias'];
1661 if (!empty($parent['alias'])) {
1662 $implicit_mentions[] = $parent['alias'];
1665 foreach ($parent_terms as $term) {
1666 $contact = Contact::getByURL($term['url'], false, ['url', 'nurl', 'alias']);
1667 if (!empty($contact['url'])) {
1668 $implicit_mentions[] = $contact['url'];
1669 $implicit_mentions[] = $contact['nurl'];
1670 $implicit_mentions[] = $contact['alias'];
1674 return $implicit_mentions;
1678 * Strips from the body prepended implicit mentions
1680 * @param string $body
1681 * @param array $parent
1684 private static function removeImplicitMentionsFromBody(string $body, array $parent): string
1686 if (DI::config()->get('system', 'disable_implicit_mentions')) {
1690 $potential_mentions = self::getImplicitMentionList($parent);
1692 $kept_mentions = [];
1694 // Extract one prepended mention at a time from the body
1695 while(preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $body, $matches)) {
1696 if (!in_array($matches[2], $potential_mentions)) {
1697 $kept_mentions[] = $matches[1];
1700 $body = $matches[3];
1703 // Re-appending the kept mentions to the body after extraction
1704 $kept_mentions[] = $body;
1706 return implode('', $kept_mentions);
1710 * Adds links to string mentions
1712 * @param string $body
1713 * @param array $tags
1716 protected static function addMentionLinks(string $body, array $tags): string
1718 // This prevents links to be added again to Pleroma-style mention links
1719 $body = self::normalizeMentionLinks($body);
1721 $body = BBCode::performWithEscapedTags($body, ['url'], function ($body) use ($tags) {
1722 foreach ($tags as $tag) {
1723 if (empty($tag['name']) || empty($tag['type']) || empty($tag['href']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
1727 $hash = substr($tag['name'], 0, 1);
1728 $name = substr($tag['name'], 1);
1729 if (!in_array($hash, Tag::TAG_CHARACTER)) {
1731 $name = $tag['name'];
1734 $body = str_replace($tag['name'], $hash . '[url=' . $tag['href'] . ']' . $name . '[/url]', $body);