3 * @copyright Copyright (C) 2010-2022, the Friendica project
5 * @license GNU AGPL version 3 or any later version
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU Affero General Public License as
9 * published by the Free Software Foundation, either version 3 of the
10 * License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU Affero General Public License for more details.
17 * You should have received a copy of the GNU Affero General Public License
18 * along with this program. If not, see <https://www.gnu.org/licenses/>.
22 namespace Friendica\Protocol\ActivityPub;
24 use Friendica\Content\Text\BBCode;
25 use Friendica\Content\Text\HTML;
26 use Friendica\Content\Text\Markdown;
27 use Friendica\Core\Cache\Enum\Duration;
28 use Friendica\Core\Logger;
29 use Friendica\Core\Protocol;
30 use Friendica\Core\System;
31 use Friendica\Core\Worker;
32 use Friendica\Database\DBA;
34 use Friendica\Model\APContact;
35 use Friendica\Model\Contact;
36 use Friendica\Model\Conversation;
37 use Friendica\Model\Event;
38 use Friendica\Model\GServer;
39 use Friendica\Model\Item;
40 use Friendica\Model\ItemURI;
41 use Friendica\Model\Mail;
42 use Friendica\Model\Tag;
43 use Friendica\Model\User;
44 use Friendica\Model\Post;
45 use Friendica\Protocol\Activity;
46 use Friendica\Protocol\ActivityPub;
47 use Friendica\Protocol\Relay;
48 use Friendica\Util\DateTimeFormat;
49 use Friendica\Util\HTTPSignature;
50 use Friendica\Util\JsonLD;
51 use Friendica\Util\Network;
52 use Friendica\Util\Strings;
53 use Friendica\Worker\Delivery;
56 * ActivityPub Processor Protocol class
60 const CACHEKEY_FETCH_ACTIVITY = 'processor:fetchMissingActivity:';
62 * Extracts the tag character (#, @, !) from mention links
67 protected static function normalizeMentionLinks(string $body): string
69 return preg_replace('%\[url=([^\[\]]*)]([#@!])(.*?)\[/url]%ism', '$2[url=$1]$3[/url]', $body);
73 * Convert the language array into a language JSON
75 * @param array $languages
76 * @return string language JSON
78 private static function processLanguages(array $languages): string
80 $codes = array_keys($languages);
82 foreach ($codes as $code) {
90 return json_encode($lang);
93 * Replaces emojis in the body
97 * @param array $emojis
99 * @return string with replaced emojis
101 private static function replaceEmojis(int $uri_id, string $body, array $emojis): string
105 array_column($emojis, 'name'),
106 array_map(function ($emoji) {
107 return '[emoji=' . $emoji['href'] . ']' . $emoji['name'] . '[/emoji]';
112 // We store the emoji here to be able to avoid storing it in the media
113 foreach ($emojis as $emoji) {
114 Post\Link::getByLink($uri_id, $emoji['href']);
120 * Store attached media files in the post-media table
123 * @param array $attachment
126 private static function storeAttachmentAsMedia(int $uriid, array $attachment)
128 if (empty($attachment['url'])) {
132 $data = ['uri-id' => $uriid];
133 $data['type'] = Post\Media::UNKNOWN;
134 $data['url'] = $attachment['url'];
135 $data['mimetype'] = $attachment['mediaType'] ?? null;
136 $data['height'] = $attachment['height'] ?? null;
137 $data['width'] = $attachment['width'] ?? null;
138 $data['size'] = $attachment['size'] ?? null;
139 $data['preview'] = $attachment['image'] ?? null;
140 $data['description'] = $attachment['name'] ?? null;
142 Post\Media::insert($data);
146 * Stire attachment data
148 * @param array $activity
151 private static function storeAttachments(array $activity, array $item)
153 if (empty($activity['attachments'])) {
157 foreach ($activity['attachments'] as $attach) {
158 self::storeAttachmentAsMedia($item['uri-id'], $attach);
163 * Store attachment data
165 * @param array $activity
168 private static function storeQuestion(array $activity, array $item)
170 if (empty($activity['question'])) {
173 $question = ['multiple' => $activity['question']['multiple']];
175 if (!empty($activity['question']['voters'])) {
176 $question['voters'] = $activity['question']['voters'];
179 if (!empty($activity['question']['end-time'])) {
180 $question['end-time'] = DateTimeFormat::utc($activity['question']['end-time']);
183 Post\Question::update($item['uri-id'], $question);
185 foreach ($activity['question']['options'] as $key => $option) {
186 $option = ['name' => $option['name'], 'replies' => $option['replies']];
187 Post\QuestionOption::update($item['uri-id'], $key, $option);
190 Logger::debug('Storing incoming question', ['type' => $activity['type'], 'uri-id' => $item['uri-id'], 'question' => $activity['question']]);
196 * @param array $activity Activity array
197 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
198 * @throws \ImagickException
200 public static function updateItem(array $activity)
202 $item = Post::selectFirst(['uri', 'uri-id', 'thr-parent', 'gravity', 'post-type'], ['uri' => $activity['id']]);
203 if (!DBA::isResult($item)) {
204 Logger::warning('No existing item, item will be created', ['uri' => $activity['id']]);
205 $item = self::createItem($activity);
210 self::postItem($activity, $item);
214 $item['changed'] = DateTimeFormat::utcNow();
215 $item['edited'] = DateTimeFormat::utc($activity['updated']);
217 $item = self::processContent($activity, $item);
222 self::storeAttachments($activity, $item);
223 self::storeQuestion($activity, $item);
225 Post\History::add($item['uri-id'], $item);
226 Item::update($item, ['uri' => $activity['id']]);
228 Queue::remove($activity);
230 if ($activity['object_type'] == 'as:Event') {
231 $posts = Post::select(['event-id', 'uid'], ["`uri` = ? AND `event-id` > ?", $activity['id'], 0]);
232 while ($post = DBA::fetch($posts)) {
233 self::updateEvent($post['event-id'], $activity);
239 * Update an existing event
241 * @param int $event_id
242 * @param array $activity
244 private static function updateEvent(int $event_id, array $activity)
246 $event = DBA::selectFirst('event', [], ['id' => $event_id]);
248 $event['edited'] = DateTimeFormat::utc($activity['updated']);
249 $event['summary'] = HTML::toBBCode($activity['name']);
250 $event['desc'] = HTML::toBBCode($activity['content']);
251 if (!empty($activity['start-time'])) {
252 $event['start'] = DateTimeFormat::utc($activity['start-time']);
254 if (!empty($activity['end-time'])) {
255 $event['finish'] = DateTimeFormat::utc($activity['end-time']);
257 $event['nofinish'] = empty($event['finish']);
258 $event['location'] = $activity['location'];
260 Logger::info('Updating event', ['uri' => $activity['id'], 'id' => $event_id]);
261 Event::store($event);
265 * Prepares data for a message
267 * @param array $activity Activity array
268 * @return array Internal item
269 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
270 * @throws \ImagickException
272 public static function createItem(array $activity): array
275 $item['verb'] = Activity::POST;
276 $item['thr-parent'] = $activity['reply-to-id'];
278 if ($activity['reply-to-id'] == $activity['id']) {
279 $item['gravity'] = GRAVITY_PARENT;
280 $item['object-type'] = Activity\ObjectType::NOTE;
282 $item['gravity'] = GRAVITY_COMMENT;
283 $item['object-type'] = Activity\ObjectType::COMMENT;
286 if (!empty($activity['context'])) {
287 $item['conversation'] = $activity['context'];
288 } elseif (!empty($activity['conversation'])) {
289 $item['conversation'] = $activity['conversation'];
292 if (!empty($item['conversation'])) {
293 $conversation = Post::selectFirstThread(['uri'], ['conversation' => $item['conversation']]);
294 if (!empty($conversation)) {
295 Logger::debug('Got conversation', ['conversation' => $item['conversation'], 'parent' => $conversation]);
296 $item['parent-uri'] = $conversation['uri'];
302 if (empty($activity['author']) && empty($activity['actor'])) {
303 Logger::notice('Missing author and actor. We quit here.', ['activity' => $activity]);
307 if (empty($activity['directmessage']) && ($activity['id'] != $activity['reply-to-id']) && !Post::exists(['uri' => $activity['reply-to-id']])) {
308 $recursion_depth = $activity['recursion-depth'] ?? 0;
309 Logger::notice('Parent not found. Try to refetch it.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
310 if ($recursion_depth < DI::config()->get('system', 'max_recursion_depth')) {
311 $result = self::fetchMissingActivity($activity['reply-to-id'], $activity, '', Receiver::COMPLETION_AUTO);
312 if (empty($result) && self::isActivityGone($activity['reply-to-id'])) {
313 // Recursively delete this and all depending entries
314 if (!empty($activity['entry-id'])) {
315 Queue::deleteById($activity['entry-id']);
319 $fetch_by_worker = empty($result);
321 Logger::notice('Recursion level is too high.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
322 $fetch_by_worker = true;
325 if ($fetch_by_worker && Queue::hasWorker($activity)) {
326 Logger::notice('There is already a worker task to fetch the post.', ['id' => $activity['id'], 'parent' => $activity['reply-to-id']]);
327 $fetch_by_worker = false;
328 if (!empty($conversation)) {
333 if ($fetch_by_worker) {
334 Logger::notice('Fetching is done by worker.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
335 $activity['recursion-depth'] = 0;
336 if (!Fetch::hasWorker($activity['reply-to-id'])) {
337 Fetch::add($activity['reply-to-id']);
338 $wid = Worker::add(PRIORITY_HIGH, 'FetchMissingActivity', $activity['reply-to-id'], $activity, '', Receiver::COMPLETION_AUTO);
339 Fetch::setWorkerId($activity['reply-to-id'], $wid);
340 Queue::setWorkerId($activity, $wid);
342 Logger::debug('Activity is already in the fetching process', ['url' => $activity['reply-to-id']]);
344 if (!empty($conversation)) {
347 } elseif (!empty($result)) {
348 if (($item['thr-parent'] != $result) && Post::exists(['uri' => $result])) {
349 $item['thr-parent'] = $result;
354 $item['diaspora_signed_text'] = $activity['diaspora:comment'] ?? '';
356 if (empty($conversation) && empty($activity['directmessage']) && ($item['gravity'] != GRAVITY_PARENT) && !Post::exists(['uri' => $item['thr-parent']])) {
357 Logger::info('Parent not found, message will be discarded.', ['thr-parent' => $item['thr-parent']]);
361 $item['network'] = Protocol::ACTIVITYPUB;
362 $item['author-link'] = $activity['author'];
363 $item['author-id'] = Contact::getIdForURL($activity['author']);
364 $item['owner-link'] = $activity['actor'];
365 $item['owner-id'] = Contact::getIdForURL($activity['actor']);
367 if (in_array(0, $activity['receiver']) && !empty($activity['unlisted'])) {
368 $item['private'] = Item::UNLISTED;
369 } elseif (in_array(0, $activity['receiver'])) {
370 $item['private'] = Item::PUBLIC;
372 $item['private'] = Item::PRIVATE;
375 if (!empty($activity['raw'])) {
376 $item['source'] = $activity['raw'];
379 $item['protocol'] = Conversation::PARCEL_ACTIVITYPUB;
381 if (isset($activity['push'])) {
382 $item['direction'] = $activity['push'] ? Conversation::PUSH : Conversation::PULL;
385 if (!empty($activity['from-relay'])) {
386 $item['direction'] = Conversation::RELAY;
389 if ($activity['object_type'] == 'as:Article') {
390 $item['post-type'] = Item::PT_ARTICLE;
391 } elseif ($activity['object_type'] == 'as:Audio') {
392 $item['post-type'] = Item::PT_AUDIO;
393 } elseif ($activity['object_type'] == 'as:Document') {
394 $item['post-type'] = Item::PT_DOCUMENT;
395 } elseif ($activity['object_type'] == 'as:Event') {
396 $item['post-type'] = Item::PT_EVENT;
397 } elseif ($activity['object_type'] == 'as:Image') {
398 $item['post-type'] = Item::PT_IMAGE;
399 } elseif ($activity['object_type'] == 'as:Page') {
400 $item['post-type'] = Item::PT_PAGE;
401 } elseif ($activity['object_type'] == 'as:Question') {
402 $item['post-type'] = Item::PT_POLL;
403 } elseif ($activity['object_type'] == 'as:Video') {
404 $item['post-type'] = Item::PT_VIDEO;
406 $item['post-type'] = Item::PT_NOTE;
409 $item['isForum'] = false;
411 if (!empty($activity['thread-completion'])) {
412 if ($activity['thread-completion'] != $item['owner-id']) {
413 $actor = Contact::getById($activity['thread-completion'], ['url']);
414 $item['causer-link'] = $actor['url'];
415 $item['causer-id'] = $activity['thread-completion'];
416 Logger::info('Use inherited actor as causer.', ['id' => $item['owner-id'], 'activity' => $activity['thread-completion'], 'owner' => $item['owner-link'], 'actor' => $actor['url']]);
418 // Store the original actor in the "causer" fields to enable the check for ignored or blocked contacts
419 $item['causer-link'] = $item['owner-link'];
420 $item['causer-id'] = $item['owner-id'];
421 Logger::info('Use actor as causer.', ['id' => $item['owner-id'], 'actor' => $item['owner-link']]);
424 $item['owner-link'] = $item['author-link'];
425 $item['owner-id'] = $item['author-id'];
427 $actor = APContact::getByURL($item['owner-link'], false);
428 $item['isForum'] = ($actor['type'] == 'Group');
431 $item['uri'] = $activity['id'];
433 if (empty($activity['published']) || empty($activity['updated'])) {
434 DI::logger()->notice('published or updated keys are empty for activity', ['activity' => $activity, 'callstack' => System::callstack(10)]);
437 $item['created'] = DateTimeFormat::utc($activity['published'] ?? 'now');
438 $item['edited'] = DateTimeFormat::utc($activity['updated'] ?? 'now');
439 $guid = $activity['sc:identifier'] ?: self::getGUIDByURL($item['uri']);
440 $item['guid'] = $activity['diaspora:guid'] ?: $guid;
442 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
443 if (empty($item['uri-id'])) {
444 Logger::warning('Unable to get a uri-id for an item uri', ['uri' => $item['uri'], 'guid' => $item['guid']]);
448 $item = self::processContent($activity, $item);
450 Logger::info('Message was not processed');
454 $item['plink'] = $activity['alternate-url'] ?? $item['uri'];
456 self::storeAttachments($activity, $item);
457 self::storeQuestion($activity, $item);
459 // We received the post via AP, so we set the protocol of the server to AP
460 $contact = Contact::getById($item['author-id'], ['gsid']);
461 if (!empty($contact['gsid'])) {
462 GServer::setProtocol($contact['gsid'], Post\DeliveryData::ACTIVITYPUB);
465 if ($item['author-id'] != $item['owner-id']) {
466 $contact = Contact::getById($item['owner-id'], ['gsid']);
467 if (!empty($contact['gsid'])) {
468 GServer::setProtocol($contact['gsid'], Post\DeliveryData::ACTIVITYPUB);
476 * Check if a given activity is no longer available
482 public static function isActivityGone(string $url): bool
484 $curlResult = HTTPSignature::fetchRaw($url, 0);
486 if (Network::isUrlBlocked($url)) {
490 // @todo To ensure that the remote system is working correctly, we can check if the "Content-Type" contains JSON
491 if (in_array($curlResult->getReturnCode(), [404])) {
495 $object = json_decode($curlResult->getBody(), true);
496 if (!empty($object)) {
497 $activity = JsonLD::compact($object);
498 if (JsonLD::fetchElement($activity, '@type') == 'as:Tombstone') {
508 * @param array $activity
509 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
510 * @throws \ImagickException
512 public static function deleteItem(array $activity)
514 $owner = Contact::getIdForURL($activity['actor']);
516 Logger::info('Deleting item', ['object' => $activity['object_id'], 'owner' => $owner]);
517 Item::markForDeletion(['uri' => $activity['object_id'], 'owner-id' => $owner]);
518 Queue::remove($activity);
522 * Prepare the item array for an activity
524 * @param array $activity Activity array
525 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
526 * @throws \ImagickException
528 public static function addTag(array $activity)
530 if (empty($activity['object_content']) || empty($activity['object_id'])) {
534 foreach ($activity['receiver'] as $receiver) {
535 $item = Post::selectFirst(['id', 'uri-id', 'origin', 'author-link'], ['uri' => $activity['target_id'], 'uid' => $receiver]);
536 if (!DBA::isResult($item)) {
537 // We don't fetch missing content for this purpose
541 if (($item['author-link'] != $activity['actor']) && !$item['origin']) {
542 Logger::info('Not origin, not from the author, skipping update', ['id' => $item['id'], 'author' => $item['author-link'], 'actor' => $activity['actor']]);
546 Tag::store($item['uri-id'], Tag::HASHTAG, $activity['object_content'], $activity['object_id']);
547 Logger::info('Tagged item', ['id' => $item['id'], 'tag' => $activity['object_content'], 'uri' => $activity['target_id'], 'actor' => $activity['actor']]);
552 * Prepare the item array for an activity
554 * @param array $activity Activity array
555 * @param string $verb Activity verb
556 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
557 * @throws \ImagickException
559 public static function createActivity(array $activity, string $verb)
561 $activity['reply-to-id'] = $activity['object_id'];
562 $item = self::createItem($activity);
567 $item['verb'] = $verb;
568 $item['thr-parent'] = $activity['object_id'];
569 $item['gravity'] = GRAVITY_ACTIVITY;
570 unset($item['post-type']);
571 $item['object-type'] = Activity\ObjectType::NOTE;
573 if (!empty($activity['content'])) {
574 $item['body'] = HTML::toBBCode($activity['content']);
577 $item['diaspora_signed_text'] = $activity['diaspora:like'] ?? '';
579 self::postItem($activity, $item);
583 * Fetch the Uri-Id of a post for the "featured" collection
585 * @param array $activity
588 private static function getUriIdForFeaturedCollection(array $activity)
590 $actor = APContact::getByURL($activity['actor']);
595 // Refetch the account when the "featured" collection is missing.
596 // This can be removed in a future version (end of 2022 should be good).
597 if (empty($actor['featured'])) {
598 $actor = APContact::getByURL($activity['actor'], true);
604 $parent = Post::selectFirst(['uri-id'], ['uri' => $activity['object_id']]);
605 if (empty($parent['uri-id'])) {
606 if (self::fetchMissingActivity($activity['object_id'], $activity, '', Receiver::COMPLETION_AUTO)) {
607 $parent = Post::selectFirst(['uri-id'], ['uri' => $activity['object_id']]);
611 if (!empty($parent['uri-id'])) {
612 return $parent['uri-id'];
619 * Add a post to the "Featured" collection
621 * @param array $activity
623 public static function addToFeaturedCollection(array $activity)
625 $uriid = self::getUriIdForFeaturedCollection($activity);
630 Logger::debug('Add post to featured collection', ['uri-id' => $uriid]);
632 Post\Collection::add($uriid, Post\Collection::FEATURED);
633 Queue::remove($activity);
637 * Remove a post to the "Featured" collection
639 * @param array $activity
641 public static function removeFromFeaturedCollection(array $activity)
643 $uriid = self::getUriIdForFeaturedCollection($activity);
648 Logger::debug('Remove post from featured collection', ['uri-id' => $uriid]);
650 Post\Collection::remove($uriid, Post\Collection::FEATURED);
651 Queue::remove($activity);
657 * @param array $activity Activity array
660 * @return int event id
663 public static function createEvent(array $activity, array $item): int
665 $event['summary'] = HTML::toBBCode($activity['name'] ?: $activity['summary']);
666 $event['desc'] = HTML::toBBCode($activity['content']);
667 if (!empty($activity['start-time'])) {
668 $event['start'] = DateTimeFormat::utc($activity['start-time']);
670 if (!empty($activity['end-time'])) {
671 $event['finish'] = DateTimeFormat::utc($activity['end-time']);
673 $event['nofinish'] = empty($event['finish']);
674 $event['location'] = $activity['location'];
675 $event['cid'] = $item['contact-id'];
676 $event['uid'] = $item['uid'];
677 $event['uri'] = $item['uri'];
678 $event['edited'] = $item['edited'];
679 $event['private'] = $item['private'];
680 $event['guid'] = $item['guid'];
681 $event['plink'] = $item['plink'];
682 $event['network'] = $item['network'];
683 $event['protocol'] = $item['protocol'];
684 $event['direction'] = $item['direction'];
685 $event['source'] = $item['source'];
687 $ev = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
688 if (DBA::isResult($ev)) {
689 $event['id'] = $ev['id'];
692 $event_id = Event::store($event);
694 Logger::info('Event was stored', ['id' => $event_id]);
700 * Process the content
702 * @param array $activity Activity array
704 * @return array|bool Returns the item array or false if there was an unexpected occurrence
707 private static function processContent(array $activity, array $item)
709 if (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/markdown')) {
710 $item['title'] = strip_tags($activity['name']);
711 $content = Markdown::toBBCode($activity['content']);
712 } elseif (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/bbcode')) {
713 $item['title'] = $activity['name'];
714 $content = $activity['content'];
716 // By default assume "text/html"
717 $item['title'] = HTML::toBBCode($activity['name'] ?? '');
718 $content = HTML::toBBCode($activity['content'] ?? '');
721 $item['title'] = trim(BBCode::toPlaintext($item['title']));
723 if (!empty($activity['languages'])) {
724 $item['language'] = self::processLanguages($activity['languages']);
727 if (!empty($activity['emojis'])) {
728 $content = self::replaceEmojis($item['uri-id'], $content, $activity['emojis']);
731 $content = self::addMentionLinks($content, $activity['tags']);
733 if (!empty($activity['source'])) {
734 $item['body'] = $activity['source'];
735 $item['raw-body'] = $content;
736 $item['body'] = Item::improveSharedDataInBody($item);
738 $parent_uri = $item['parent-uri'] ?? $item['thr-parent'];
739 if (empty($activity['directmessage']) && ($parent_uri != $item['uri']) && ($item['gravity'] == GRAVITY_COMMENT)) {
740 $parent = Post::selectFirst(['id', 'uri-id', 'private', 'author-link', 'alias'], ['uri' => $parent_uri]);
741 if (!DBA::isResult($parent)) {
742 Logger::warning('Unknown parent item.', ['uri' => $parent_uri]);
745 if (($item['private'] == Item::PRIVATE) && ($parent['private'] != Item::PRIVATE)) {
746 Logger::warning('Item is private but the parent is not. Dropping.', ['item-uri' => $item['uri'], 'thr-parent' => $item['thr-parent']]);
750 $content = self::removeImplicitMentionsFromBody($content, $parent);
752 $item['content-warning'] = HTML::toBBCode($activity['summary'] ?? '');
753 $item['raw-body'] = $item['body'] = $content;
756 self::storeFromBody($item);
757 self::storeTags($item['uri-id'], $activity['tags']);
759 self::storeReceivers($item['uri-id'], $activity['receiver_urls'] ?? []);
761 $item['location'] = $activity['location'];
763 if (!empty($activity['latitude']) && !empty($activity['longitude'])) {
764 $item['coord'] = $activity['latitude'] . ' ' . $activity['longitude'];
767 $item['app'] = $activity['generator'];
773 * Store hashtags and mentions
777 private static function storeFromBody(array $item)
779 // Make sure to delete all existing tags (can happen when called via the update functionality)
780 DBA::delete('post-tag', ['uri-id' => $item['uri-id']]);
782 Tag::storeFromBody($item['uri-id'], $item['body'], '@!');
786 * Generate a GUID out of an URL of an ActivityPub post.
788 * @param string $url message URL
789 * @return string with GUID
791 private static function getGUIDByURL(string $url): string
793 $parsed = parse_url($url);
795 $host_hash = hash('crc32', $parsed['host']);
797 unset($parsed["scheme"]);
798 unset($parsed["host"]);
800 $path = implode("/", $parsed);
802 return $host_hash . '-'. hash('fnv164', $path) . '-'. hash('joaat', $path);
806 * Checks if an incoming message is wanted
808 * @param array $activity
810 * @return boolean Is the message wanted?
812 private static function isSolicitedMessage(array $activity, array $item): bool
814 // The checks are split to improve the support when searching why a message was accepted.
815 if (count($activity['receiver']) != 1) {
816 // The message has more than one receiver, so it is wanted.
817 Logger::debug('Message has got several receivers - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
821 if ($item['private'] == Item::PRIVATE) {
822 // We only look at public posts here. Private posts are expected to be intentionally posted to the single receiver.
823 Logger::debug('Message is private - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
827 if (!empty($activity['from-relay'])) {
828 // We check relay posts at another place. When it arrived here, the message is already checked.
829 Logger::debug('Message is a relay post that is already checked - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
833 if (in_array($activity['completion-mode'] ?? Receiver::COMPLETION_NONE, [Receiver::COMPLETION_MANUAL, Receiver::COMPLETION_ANNOUCE])) {
834 // Manual completions and completions caused by reshares are allowed without any further checks.
835 Logger::debug('Message is in completion mode - accepted', ['mode' => $activity['completion-mode'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
839 if ($item['gravity'] != GRAVITY_PARENT) {
840 // We cannot reliably check at this point if a comment or activity belongs to an accepted post or needs to be fetched
841 // This can possibly be improved in the future.
842 Logger::debug('Message is no parent - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
846 $tags = array_column(Tag::getByURIId($item['uri-id'], [Tag::HASHTAG]), 'name');
847 if (Relay::isSolicitedPost($tags, $item['body'], $item['author-id'], $item['uri'], Protocol::ACTIVITYPUB)) {
848 Logger::debug('Post is accepted because of the relay settings', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
856 * Creates an item post
858 * @param array $activity Activity data
859 * @param array $item item array
860 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
861 * @throws \ImagickException
863 public static function postItem(array $activity, array $item)
871 ksort($activity['receiver']);
873 if (!self::isSolicitedMessage($activity, $item)) {
874 DBA::delete('item-uri', ['id' => $item['uri-id']]);
878 foreach ($activity['receiver'] as $receiver) {
879 if ($receiver == -1) {
883 $item['uid'] = $receiver;
885 $type = $activity['reception_type'][$receiver] ?? Receiver::TARGET_UNKNOWN;
887 case Receiver::TARGET_TO:
888 $item['post-reason'] = Item::PR_TO;
890 case Receiver::TARGET_CC:
891 $item['post-reason'] = Item::PR_CC;
893 case Receiver::TARGET_BTO:
894 $item['post-reason'] = Item::PR_BTO;
896 case Receiver::TARGET_BCC:
897 $item['post-reason'] = Item::PR_BCC;
899 case Receiver::TARGET_FOLLOWER:
900 $item['post-reason'] = Item::PR_FOLLOWER;
902 case Receiver::TARGET_ANSWER:
903 $item['post-reason'] = Item::PR_COMMENT;
905 case Receiver::TARGET_GLOBAL:
906 $item['post-reason'] = Item::PR_GLOBAL;
909 $item['post-reason'] = Item::PR_NONE;
912 if (!empty($activity['from-relay'])) {
913 $item['post-reason'] = Item::PR_RELAY;
914 } elseif (!empty($activity['thread-completion'])) {
915 $item['post-reason'] = Item::PR_FETCHED;
916 } elseif (in_array($item['post-reason'], [Item::PR_GLOBAL, Item::PR_NONE]) && !empty($activity['push'])) {
917 $item['post-reason'] = Item::PR_PUSHED;
920 if ($item['isForum'] ?? false) {
921 $item['contact-id'] = Contact::getIdForURL($activity['actor'], $receiver);
923 $item['contact-id'] = Contact::getIdForURL($activity['author'], $receiver);
926 if (($receiver != 0) && empty($item['contact-id'])) {
927 $item['contact-id'] = Contact::getIdForURL($activity['author']);
930 if (!empty($activity['directmessage'])) {
931 self::postMail($activity, $item);
935 if (!($item['isForum'] ?? false) && ($receiver != 0) && ($item['gravity'] == GRAVITY_PARENT) && !Contact::isSharingByURL($activity['author'], $receiver)) {
936 if ($item['post-reason'] == Item::PR_BCC) {
937 Logger::info('Top level post via BCC from a non sharer, ignoring', ['uid' => $receiver, 'contact' => $item['contact-id']]);
942 !empty($activity['thread-children-type'])
943 && in_array($activity['thread-children-type'], Receiver::ACTIVITY_TYPES)
944 && DI::pConfig()->get($receiver, 'system', 'accept_only_sharer') != Item::COMPLETION_LIKE
946 Logger::info('Top level post from thread completion from a non sharer had been initiated via an activity, ignoring',
947 ['type' => $activity['thread-children-type'], 'user' => $item['uid'], 'causer' => $item['causer-link'], 'author' => $activity['author'], 'url' => $item['uri']]);
954 if ($receiver != 0) {
955 $user = User::getById($receiver, ['account-type']);
956 if (!empty($user['account-type'])) {
957 $is_forum = ($user['account-type'] == User::ACCOUNT_TYPE_COMMUNITY);
961 if (!$is_forum && DI::pConfig()->get($receiver, 'system', 'accept_only_sharer') == Item::COMPLETION_NONE && ($receiver != 0) && ($item['gravity'] == GRAVITY_PARENT)) {
962 $skip = !Contact::isSharingByURL($activity['author'], $receiver);
964 if ($skip && (($activity['type'] == 'as:Announce') || ($item['isForum'] ?? false))) {
965 $skip = !Contact::isSharingByURL($activity['actor'], $receiver);
969 Logger::info('Skipping post', ['uid' => $receiver, 'url' => $item['uri']]);
973 Logger::info('Accepting post', ['uid' => $receiver, 'url' => $item['uri']]);
976 if (($item['gravity'] != GRAVITY_ACTIVITY) && ($activity['object_type'] == 'as:Event')) {
977 $event_id = self::createEvent($activity, $item);
979 $item = Event::getItemArrayForImportedId($event_id, $item);
982 $item_id = Item::insert($item);
984 Logger::info('Item insertion successful', ['user' => $item['uid'], 'item_id' => $item_id]);
987 Logger::notice('Item insertion aborted', ['uri' => $item['uri'], 'uid' => $item['uid']]);
990 if ($item['uid'] == 0) {
995 Queue::remove($activity);
997 if ($success && Queue::hasChildren($item['uri'])) {
998 Worker::add(PRIORITY_HIGH, 'ProcessReplyByUri', $item['uri']);
1001 // Store send a follow request for every reshare - but only when the item had been stored
1002 if ($stored && ($item['private'] != Item::PRIVATE) && ($item['gravity'] == GRAVITY_PARENT) && !empty($item['author-link']) && ($item['author-link'] != $item['owner-link'])) {
1003 $author = APContact::getByURL($item['owner-link'], false);
1004 // We send automatic follow requests for reshared messages. (We don't need though for forum posts)
1005 if ($author['type'] != 'Group') {
1006 Logger::info('Send follow request', ['uri' => $item['uri'], 'stored' => $stored, 'to' => $item['author-link']]);
1007 ActivityPub\Transmitter::sendFollowObject($item['uri'], $item['author-link']);
1013 * Store tags and mentions into the tag table
1015 * @param integer $uriid
1016 * @param array $tags
1018 private static function storeTags(int $uriid, array $tags = null)
1020 foreach ($tags as $tag) {
1021 if (empty($tag['name']) || empty($tag['type']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
1025 $hash = substr($tag['name'], 0, 1);
1027 if ($tag['type'] == 'Mention') {
1028 if (in_array($hash, [Tag::TAG_CHARACTER[Tag::MENTION],
1029 Tag::TAG_CHARACTER[Tag::EXCLUSIVE_MENTION],
1030 Tag::TAG_CHARACTER[Tag::IMPLICIT_MENTION]])) {
1031 $tag['name'] = substr($tag['name'], 1);
1033 $type = Tag::IMPLICIT_MENTION;
1035 if (!empty($tag['href'])) {
1036 $apcontact = APContact::getByURL($tag['href']);
1037 if (!empty($apcontact['name']) || !empty($apcontact['nick'])) {
1038 $tag['name'] = $apcontact['name'] ?: $apcontact['nick'];
1041 } elseif ($tag['type'] == 'Hashtag') {
1042 if ($hash == Tag::TAG_CHARACTER[Tag::HASHTAG]) {
1043 $tag['name'] = substr($tag['name'], 1);
1045 $type = Tag::HASHTAG;
1048 if (empty($tag['name'])) {
1052 Tag::store($uriid, $type, $tag['name'], $tag['href']);
1056 public static function storeReceivers(int $uriid, array $receivers)
1058 foreach (['as:to' => Tag::TO, 'as:cc' => Tag::CC, 'as:bto' => Tag::BTO, 'as:bcc' => Tag::BCC] as $element => $type) {
1059 if (!empty($receivers[$element])) {
1060 foreach ($receivers[$element] as $receiver) {
1061 if ($receiver == ActivityPub::PUBLIC_COLLECTION) {
1062 $name = Receiver::PUBLIC_COLLECTION;
1064 $name = trim(parse_url($receiver, PHP_URL_PATH), '/');
1067 $target = Tag::getTargetType($receiver);
1068 Logger::debug('Got target type', ['type' => $target, 'url' => $receiver]);
1069 Tag::store($uriid, $type, $name, $receiver, $target);
1076 * Creates an mail post
1078 * @param array $activity Activity data
1079 * @param array $item item array
1080 * @return int|bool New mail table row id or false on error
1081 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1083 private static function postMail(array $activity, array $item)
1085 if (($item['gravity'] != GRAVITY_PARENT) && !DBA::exists('mail', ['uri' => $item['thr-parent'], 'uid' => $item['uid']])) {
1086 Logger::info('Parent not found, mail will be discarded.', ['uid' => $item['uid'], 'uri' => $item['thr-parent']]);
1090 Logger::info('Direct Message', $item);
1093 $msg['uid'] = $item['uid'];
1095 $msg['contact-id'] = $item['contact-id'];
1097 $contact = Contact::getById($item['contact-id'], ['name', 'url', 'photo']);
1098 $msg['from-name'] = $contact['name'];
1099 $msg['from-url'] = $contact['url'];
1100 $msg['from-photo'] = $contact['photo'];
1102 $msg['uri'] = $item['uri'];
1103 $msg['created'] = $item['created'];
1105 $parent = DBA::selectFirst('mail', ['parent-uri', 'title'], ['uri' => $item['thr-parent']]);
1106 if (DBA::isResult($parent)) {
1107 $msg['parent-uri'] = $parent['parent-uri'];
1108 $msg['title'] = $parent['title'];
1110 $msg['parent-uri'] = $item['thr-parent'];
1112 if (!empty($item['title'])) {
1113 $msg['title'] = $item['title'];
1114 } elseif (!empty($item['content-warning'])) {
1115 $msg['title'] = $item['content-warning'];
1117 // Trying to generate a title out of the body
1118 $title = $item['body'];
1120 while (preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $title, $matches)) {
1121 $title = $matches[3];
1124 $title = trim(BBCode::toPlaintext($title));
1126 if (strlen($title) > 20) {
1127 $title = substr($title, 0, 20) . '...';
1130 $msg['title'] = $title;
1133 $msg['body'] = $item['body'];
1135 return Mail::insert($msg);
1139 * Fetch featured posts from a contact with the given url
1141 * @param string $url
1144 public static function fetchFeaturedPosts(string $url)
1146 Logger::info('Fetch featured posts', ['contact' => $url]);
1148 $apcontact = APContact::getByURL($url);
1149 if (empty($apcontact['featured'])) {
1150 Logger::info('Contact does not have a featured collection', ['contact' => $url]);
1154 $pcid = Contact::getIdForURL($url, 0, false);
1156 Logger::info('Contact not found', ['contact' => $url]);
1160 $posts = Post\Collection::selectToArrayForContact($pcid, Post\Collection::FEATURED);
1161 if (!empty($posts)) {
1162 $old_featured = array_column($posts, 'uri-id');
1167 $featured = ActivityPub::fetchItems($apcontact['featured']);
1168 if (empty($featured)) {
1169 Logger::info('Contact does not have featured posts', ['contact' => $url]);
1171 foreach ($old_featured as $uri_id) {
1172 Post\Collection::remove($uri_id, Post\Collection::FEATURED);
1173 Logger::debug('Removed no longer featured post', ['uri-id' => $uri_id, 'contact' => $url]);
1181 foreach ($featured as $post) {
1182 if (empty($post['id'])) {
1185 $id = Item::fetchByLink($post['id']);
1187 $item = Post::selectFirst(['uri-id', 'featured'], ['id' => $id]);
1188 if (!empty($item['uri-id'])) {
1189 if (!$item['featured']) {
1190 Post\Collection::add($item['uri-id'], Post\Collection::FEATURED);
1191 Logger::debug('Added featured post', ['uri-id' => $item['uri-id'], 'contact' => $url]);
1194 Logger::debug('Post already had been featured', ['uri-id' => $item['uri-id'], 'contact' => $url]);
1198 $index = array_search($item['uri-id'], $old_featured);
1199 if (!($index === false)) {
1200 unset($old_featured[$index]);
1206 foreach ($old_featured as $uri_id) {
1207 Post\Collection::remove($uri_id, Post\Collection::FEATURED);
1208 Logger::debug('Removed no longer featured post', ['uri-id' => $uri_id, 'contact' => $url]);
1211 Logger::info('Fetched featured posts', ['new' => $new, 'old' => $old, 'contact' => $url]);
1214 public static function fetchCachedActivity(string $url, int $uid): array
1216 $cachekey = self::CACHEKEY_FETCH_ACTIVITY . $uid . ':' . $url;
1217 $object = DI::cache()->get($cachekey);
1219 if (!is_null($object)) {
1220 if (!empty($object)) {
1221 Logger::debug('Fetch from cache', ['url' => $url, 'uid' => $uid]);
1223 Logger::debug('Fetch from negative cache', ['url' => $url, 'uid' => $uid]);
1228 $object = ActivityPub::fetchContent($url, $uid);
1229 if (empty($object)) {
1230 Logger::notice('Activity was not fetchable, aborting.', ['url' => $url, 'uid' => $uid]);
1231 // We perform negative caching.
1232 DI::cache()->set($cachekey, [], Duration::FIVE_MINUTES);
1236 if (empty($object['id'])) {
1237 Logger::notice('Activity has got not id, aborting. ', ['url' => $url, 'object' => $object]);
1240 DI::cache()->set($cachekey, $object, Duration::FIVE_MINUTES);
1242 Logger::debug('Activity was fetched successfully', ['url' => $url, 'uid' => $uid]);
1248 * Fetches missing posts
1250 * @param string $url message URL
1251 * @param array $child activity array with the child of this message
1252 * @param string $relay_actor Relay actor
1253 * @param int $completion Completion mode, see Receiver::COMPLETION_*
1254 * @return string fetched message URL
1255 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1256 * @throws \ImagickException
1258 public static function fetchMissingActivity(string $url, array $child = [], string $relay_actor = '', int $completion = Receiver::COMPLETION_MANUAL): string
1260 if (!empty($child['receiver'])) {
1261 $uid = ActivityPub\Receiver::getFirstUserFromReceivers($child['receiver']);
1266 $object = self::fetchCachedActivity($url, $uid);
1267 if (empty($object)) {
1273 if (!empty($object['attributedTo'])) {
1274 $attributed_to = $object['attributedTo'];
1275 if (is_array($attributed_to)) {
1276 $compacted = JsonLD::compact($object);
1277 $attributed_to = JsonLD::fetchElement($compacted, 'as:attributedTo', '@id');
1279 $signer[] = $attributed_to;
1282 if (!empty($object['actor'])) {
1283 $object_actor = $object['actor'];
1284 } elseif (!empty($attributed_to)) {
1285 $object_actor = $attributed_to;
1291 $signer[] = $object_actor;
1293 if (!empty($child['author'])) {
1294 $actor = $child['author'];
1297 $actor = $object_actor;
1300 if (!empty($object['published'])) {
1301 $published = $object['published'];
1302 } elseif (!empty($child['published'])) {
1303 $published = $child['published'];
1305 $published = DateTimeFormat::utcNow();
1309 $activity['@context'] = $object['@context'] ?? ActivityPub::CONTEXT;
1310 unset($object['@context']);
1311 $activity['id'] = $object['id'];
1312 $activity['to'] = $object['to'] ?? [];
1313 $activity['cc'] = $object['cc'] ?? [];
1314 $activity['actor'] = $actor;
1315 $activity['object'] = $object;
1316 $activity['published'] = $published;
1317 $activity['type'] = 'Create';
1319 $ldactivity = JsonLD::compact($activity);
1321 $ldactivity['recursion-depth'] = !empty($child['recursion-depth']) ? $child['recursion-depth'] + 1 : 1;
1323 if (!empty($relay_actor)) {
1324 $ldactivity['thread-completion'] = $ldactivity['from-relay'] = Contact::getIdForURL($relay_actor);
1325 $ldactivity['completion-mode'] = Receiver::COMPLETION_RELAY;
1326 } elseif (!empty($child['thread-completion'])) {
1327 $ldactivity['thread-completion'] = $child['thread-completion'];
1328 $ldactivity['completion-mode'] = $child['completion-mode'] ?? Receiver::COMPLETION_NONE;
1330 $ldactivity['thread-completion'] = Contact::getIdForURL($actor);
1331 $ldactivity['completion-mode'] = $completion;
1334 if (!empty($child['type'])) {
1335 $ldactivity['thread-children-type'] = $child['type'];
1338 if (!empty($relay_actor) && !self::acceptIncomingMessage($ldactivity, $object['id'])) {
1342 ActivityPub\Receiver::processActivity($ldactivity, json_encode($activity), $uid, true, false, $signer);
1344 Logger::notice('Activity had been fetched and processed.', ['url' => $url, 'object' => $activity['id']]);
1346 return $activity['id'];
1350 * Test if incoming relay messages should be accepted
1352 * @param array $activity activity array
1353 * @param string $id object ID
1354 * @return boolean true if message is accepted
1356 private static function acceptIncomingMessage(array $activity, string $id): bool
1358 if (empty($activity['as:object'])) {
1359 Logger::info('No object field in activity - accepted', ['id' => $id]);
1363 $replyto = JsonLD::fetchElement($activity['as:object'], 'as:inReplyTo', '@id');
1364 $uriid = ItemURI::getIdByURI($replyto ?? '');
1365 if (Post::exists(['uri-id' => $uriid])) {
1366 Logger::info('Post is a reply to an existing post - accepted', ['id' => $id, 'uri-id' => $uriid, 'replyto' => $replyto]);
1370 $attributed_to = JsonLD::fetchElement($activity['as:object'], 'as:attributedTo', '@id');
1371 $authorid = Contact::getIdForURL($attributed_to);
1373 $body = HTML::toBBCode(JsonLD::fetchElement($activity['as:object'], 'as:content', '@value') ?? '');
1376 $tags = Receiver::processTags(JsonLD::fetchElementArray($activity['as:object'], 'as:tag') ?? []);
1377 if (!empty($tags)) {
1378 foreach ($tags as $tag) {
1379 if ($tag['type'] != 'Hashtag') {
1382 $messageTags[] = ltrim(mb_strtolower($tag['name']), '#');
1386 return Relay::isSolicitedPost($messageTags, $body, $authorid, $id, Protocol::ACTIVITYPUB);
1390 * perform a "follow" request
1392 * @param array $activity
1394 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1395 * @throws \ImagickException
1397 public static function followUser(array $activity)
1399 $uid = User::getIdForURL($activity['object_id']);
1401 Queue::remove($activity);
1405 $owner = User::getOwnerDataById($uid);
1406 if (empty($owner)) {
1410 $cid = Contact::getIdForURL($activity['actor'], $uid);
1412 self::switchContact($cid);
1413 Contact::update(['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
1417 'author-id' => Contact::getIdForURL($activity['actor']),
1418 'author-link' => $activity['actor'],
1421 // Ensure that the contact has got the right network type
1422 self::switchContact($item['author-id']);
1424 $result = Contact::addRelationship($owner, [], $item, false, $activity['content'] ?? '');
1425 if ($result === true) {
1426 ActivityPub\Transmitter::sendContactAccept($item['author-link'], $activity['id'], $owner['uid']);
1429 $cid = Contact::getIdForURL($activity['actor'], $uid);
1434 if ($result && DI::config()->get('system', 'transmit_pending_events') && ($owner['contact-type'] == Contact::TYPE_COMMUNITY)) {
1435 self::transmitPendingEvents($cid, $owner['uid']);
1438 if (empty($contact)) {
1439 Contact::update(['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
1441 Logger::notice('Follow user ' . $uid . ' from contact ' . $cid . ' with id ' . $activity['id']);
1442 Queue::remove($activity);
1446 * Transmit pending events to the new follower
1448 * @param integer $cid Contact id
1449 * @param integer $uid User id
1452 private static function transmitPendingEvents(int $cid, int $uid)
1454 $account = DBA::selectFirst('account-user-view', ['ap-inbox', 'ap-sharedinbox'], ['id' => $cid]);
1455 $inbox = $account['ap-sharedinbox'] ?: $account['ap-inbox'];
1457 $events = DBA::select('event', ['id'], ["`uid` = ? AND `start` > ? AND `type` != ?", $uid, DateTimeFormat::utcNow(), 'birthday']);
1458 while ($event = DBA::fetch($events)) {
1459 $post = Post::selectFirst(['id', 'uri-id', 'created'], ['event-id' => $event['id']]);
1463 if (DI::config()->get('system', 'bulk_delivery')) {
1464 Post\Delivery::add($post['uri-id'], $uid, $inbox, $post['created'], Delivery::POST, [$cid]);
1465 Worker::add(PRIORITY_HIGH, 'APDelivery', '', 0, $inbox, 0);
1467 Worker::add(PRIORITY_HIGH, 'APDelivery', Delivery::POST, $post['id'], $inbox, $uid, [$cid], $post['uri-id']);
1473 * Update the given profile
1475 * @param array $activity
1476 * @throws \Exception
1478 public static function updatePerson(array $activity)
1480 if (empty($activity['object_id'])) {
1484 Logger::info('Updating profile', ['object' => $activity['object_id']]);
1485 Contact::updateFromProbeByURL($activity['object_id']);
1486 Queue::remove($activity);
1490 * Delete the given profile
1492 * @param array $activity
1494 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1496 public static function deletePerson(array $activity)
1498 if (empty($activity['object_id']) || empty($activity['actor'])) {
1499 Logger::info('Empty object id or actor.');
1503 if ($activity['object_id'] != $activity['actor']) {
1504 Logger::info('Object id does not match actor.');
1508 $contacts = DBA::select('contact', ['id'], ['nurl' => Strings::normaliseLink($activity['object_id'])]);
1509 while ($contact = DBA::fetch($contacts)) {
1510 Contact::remove($contact['id']);
1512 DBA::close($contacts);
1514 Logger::info('Deleted contact', ['object' => $activity['object_id']]);
1515 Queue::remove($activity);
1519 * Blocks the user by the contact
1521 * @param array $activity
1523 * @throws \Exception
1525 public static function blockAccount(array $activity)
1527 $cid = Contact::getIdForURL($activity['actor']);
1532 $uid = User::getIdForURL($activity['object_id']);
1537 Contact\User::setIsBlocked($cid, $uid, true);
1539 Logger::info('Contact blocked user', ['contact' => $cid, 'user' => $uid]);
1540 Queue::remove($activity);
1544 * Unblocks the user by the contact
1546 * @param array $activity
1548 * @throws \Exception
1550 public static function unblockAccount(array $activity)
1552 $cid = Contact::getIdForURL($activity['actor']);
1557 $uid = User::getIdForURL($activity['object_object']);
1562 Contact\User::setIsBlocked($cid, $uid, false);
1564 Logger::info('Contact unblocked user', ['contact' => $cid, 'user' => $uid]);
1565 Queue::remove($activity);
1569 * Accept a follow request
1571 * @param array $activity
1572 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1573 * @throws \ImagickException
1575 public static function acceptFollowUser(array $activity)
1577 $uid = User::getIdForURL($activity['object_actor']);
1582 $cid = Contact::getIdForURL($activity['actor'], $uid);
1584 Logger::info('No contact found', ['actor' => $activity['actor']]);
1588 self::switchContact($cid);
1590 $fields = ['pending' => false];
1592 $contact = DBA::selectFirst('contact', ['rel'], ['id' => $cid]);
1593 if ($contact['rel'] == Contact::FOLLOWER) {
1594 $fields['rel'] = Contact::FRIEND;
1597 $condition = ['id' => $cid];
1598 Contact::update($fields, $condition);
1599 Logger::info('Accept contact request', ['contact' => $cid, 'user' => $uid]);
1600 Queue::remove($activity);
1604 * Reject a follow request
1606 * @param array $activity
1607 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1608 * @throws \ImagickException
1610 public static function rejectFollowUser(array $activity)
1612 $uid = User::getIdForURL($activity['object_actor']);
1617 $cid = Contact::getIdForURL($activity['actor'], $uid);
1619 Logger::info('No contact found', ['actor' => $activity['actor']]);
1623 self::switchContact($cid);
1625 $contact = Contact::getById($cid, ['rel']);
1626 if ($contact['rel'] == Contact::SHARING) {
1627 Contact::remove($cid);
1628 Logger::info('Rejected contact request - contact removed', ['contact' => $cid, 'user' => $uid]);
1629 } elseif ($contact['rel'] == Contact::FRIEND) {
1630 Contact::update(['rel' => Contact::FOLLOWER], ['id' => $cid]);
1632 Logger::info('Rejected contact request', ['contact' => $cid, 'user' => $uid]);
1634 Queue::remove($activity);
1638 * Undo activity like "like" or "dislike"
1640 * @param array $activity
1641 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1642 * @throws \ImagickException
1644 public static function undoActivity(array $activity)
1646 if (empty($activity['object_id'])) {
1650 if (empty($activity['object_actor'])) {
1654 $author_id = Contact::getIdForURL($activity['object_actor']);
1655 if (empty($author_id)) {
1659 Item::markForDeletion(['uri' => $activity['object_id'], 'author-id' => $author_id, 'gravity' => GRAVITY_ACTIVITY]);
1660 Queue::remove($activity);
1664 * Activity to remove a follower
1666 * @param array $activity
1667 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1668 * @throws \ImagickException
1670 public static function undoFollowUser(array $activity)
1672 $uid = User::getIdForURL($activity['object_object']);
1677 $owner = User::getOwnerDataById($uid);
1678 if (empty($owner)) {
1682 $cid = Contact::getIdForURL($activity['actor'], $uid);
1684 Logger::info('No contact found', ['actor' => $activity['actor']]);
1688 self::switchContact($cid);
1690 $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
1691 if (!DBA::isResult($contact)) {
1695 Contact::removeFollower($contact);
1696 Logger::info('Undo following request', ['contact' => $cid, 'user' => $uid]);
1697 Queue::remove($activity);
1701 * Switches a contact to AP if needed
1703 * @param integer $cid Contact ID
1705 * @throws \Exception
1707 private static function switchContact(int $cid)
1709 $contact = DBA::selectFirst('contact', ['network', 'url'], ['id' => $cid]);
1710 if (!DBA::isResult($contact) || in_array($contact['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN]) || Contact::isLocal($contact['url'])) {
1714 Logger::info('Change existing contact', ['cid' => $cid, 'previous' => $contact['network']]);
1715 Contact::updateFromProbe($cid);
1719 * Collects implicit mentions like:
1720 * - the author of the parent item
1721 * - all the mentioned conversants in the parent item
1723 * @param array $parent Item array with at least ['id', 'author-link', 'alias']
1725 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1727 private static function getImplicitMentionList(array $parent): array
1729 $parent_terms = Tag::getByURIId($parent['uri-id'], [Tag::MENTION, Tag::IMPLICIT_MENTION, Tag::EXCLUSIVE_MENTION]);
1731 $parent_author = Contact::getByURL($parent['author-link'], false, ['url', 'nurl', 'alias']);
1733 $implicit_mentions = [];
1734 if (empty($parent_author['url'])) {
1735 Logger::notice('Author public contact unknown.', ['author-link' => $parent['author-link'], 'parent-id' => $parent['id']]);
1737 $implicit_mentions[] = $parent_author['url'];
1738 $implicit_mentions[] = $parent_author['nurl'];
1739 $implicit_mentions[] = $parent_author['alias'];
1742 if (!empty($parent['alias'])) {
1743 $implicit_mentions[] = $parent['alias'];
1746 foreach ($parent_terms as $term) {
1747 $contact = Contact::getByURL($term['url'], false, ['url', 'nurl', 'alias']);
1748 if (!empty($contact['url'])) {
1749 $implicit_mentions[] = $contact['url'];
1750 $implicit_mentions[] = $contact['nurl'];
1751 $implicit_mentions[] = $contact['alias'];
1755 return $implicit_mentions;
1759 * Strips from the body prepended implicit mentions
1761 * @param string $body
1762 * @param array $parent
1765 private static function removeImplicitMentionsFromBody(string $body, array $parent): string
1767 if (DI::config()->get('system', 'disable_implicit_mentions')) {
1771 $potential_mentions = self::getImplicitMentionList($parent);
1773 $kept_mentions = [];
1775 // Extract one prepended mention at a time from the body
1776 while(preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $body, $matches)) {
1777 if (!in_array($matches[2], $potential_mentions)) {
1778 $kept_mentions[] = $matches[1];
1781 $body = $matches[3];
1784 // Re-appending the kept mentions to the body after extraction
1785 $kept_mentions[] = $body;
1787 return implode('', $kept_mentions);
1791 * Adds links to string mentions
1793 * @param string $body
1794 * @param array $tags
1797 protected static function addMentionLinks(string $body, array $tags): string
1799 // This prevents links to be added again to Pleroma-style mention links
1800 $body = self::normalizeMentionLinks($body);
1802 $body = BBCode::performWithEscapedTags($body, ['url'], function ($body) use ($tags) {
1803 foreach ($tags as $tag) {
1804 if (empty($tag['name']) || empty($tag['type']) || empty($tag['href']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
1808 $hash = substr($tag['name'], 0, 1);
1809 $name = substr($tag['name'], 1);
1810 if (!in_array($hash, Tag::TAG_CHARACTER)) {
1812 $name = $tag['name'];
1815 $body = str_replace($tag['name'], $hash . '[url=' . $tag['href'] . ']' . $name . '[/url]', $body);