3 * @copyright Copyright (C) 2010-2023, the Friendica project
5 * @license GNU AGPL version 3 or any later version
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU Affero General Public License as
9 * published by the Free Software Foundation, either version 3 of the
10 * License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU Affero General Public License for more details.
17 * You should have received a copy of the GNU Affero General Public License
18 * along with this program. If not, see <https://www.gnu.org/licenses/>.
22 namespace Friendica\Protocol\ActivityPub;
24 use Friendica\Content\Text\BBCode;
25 use Friendica\Content\Text\HTML;
26 use Friendica\Content\Text\Markdown;
27 use Friendica\Core\Cache\Enum\Duration;
28 use Friendica\Core\Logger;
29 use Friendica\Core\Protocol;
30 use Friendica\Core\System;
31 use Friendica\Core\Worker;
32 use Friendica\Database\DBA;
34 use Friendica\Model\APContact;
35 use Friendica\Model\Contact;
36 use Friendica\Model\Conversation;
37 use Friendica\Model\Event;
38 use Friendica\Model\GServer;
39 use Friendica\Model\Item;
40 use Friendica\Model\ItemURI;
41 use Friendica\Model\Mail;
42 use Friendica\Model\Tag;
43 use Friendica\Model\User;
44 use Friendica\Model\Post;
45 use Friendica\Model\Post\Engagement;
46 use Friendica\Protocol\Activity;
47 use Friendica\Protocol\ActivityPub;
48 use Friendica\Protocol\Delivery;
49 use Friendica\Protocol\Relay;
50 use Friendica\Util\DateTimeFormat;
51 use Friendica\Util\HTTPSignature;
52 use Friendica\Util\JsonLD;
53 use Friendica\Util\Network;
54 use Friendica\Util\Strings;
57 * ActivityPub Processor Protocol class
61 const CACHEKEY_FETCH_ACTIVITY = 'processor:fetchMissingActivity:';
62 const CACHEKEY_JUST_FETCHED = 'processor:isJustFetched:';
65 * Add an object id to the list of processed ids
71 private static function addActivityId(string $id)
73 DBA::delete('fetched-activity', ["`received` < ?", DateTimeFormat::utc('now - 5 minutes')]);
74 DBA::insert('fetched-activity', ['object-id' => $id, 'received' => DateTimeFormat::utcNow()]);
78 * Checks if the given object id has just been fetched
84 private static function isFetched(string $id): bool
86 return DBA::exists('fetched-activity', ['object-id' => $id]);
90 * Extracts the tag character (#, @, !) from mention links
95 public static function normalizeMentionLinks(string $body): string
97 $body = preg_replace('%\[url=([^\[\]]*)]([#@!])(.*?)\[/url]%ism', '$2[url=$1]$3[/url]', $body);
98 $body = preg_replace('%([#@!])\[zrl=([^\[\]]*)](.*?)\[/zrl]%ism', '$1[url=$2]$3[/url]', $body);
103 * Convert the language array into a language JSON
105 * @param array $languages
106 * @return string language JSON
108 private static function processLanguages(array $languages): string
110 $codes = array_keys($languages);
112 foreach ($codes as $code) {
120 return json_encode($lang);
123 * Replaces emojis in the body
126 * @param string $body
127 * @param array $emojis
129 * @return string with replaced emojis
131 private static function replaceEmojis(int $uri_id, string $body, array $emojis): string
135 array_column($emojis, 'name'),
136 array_map(function ($emoji) {
137 return '[emoji=' . $emoji['href'] . ']' . $emoji['name'] . '[/emoji]';
142 // We store the emoji here to be able to avoid storing it in the media
143 foreach ($emojis as $emoji) {
144 Post\Link::getByLink($uri_id, $emoji['href']);
150 * Store attached media files in the post-media table
153 * @param array $attachment
156 private static function storeAttachmentAsMedia(int $uriid, array $attachment)
158 if (empty($attachment['url'])) {
162 $data = ['uri-id' => $uriid];
163 $data['type'] = Post\Media::UNKNOWN;
164 $data['url'] = $attachment['url'];
165 $data['mimetype'] = $attachment['mediaType'] ?? null;
166 $data['height'] = $attachment['height'] ?? null;
167 $data['width'] = $attachment['width'] ?? null;
168 $data['size'] = $attachment['size'] ?? null;
169 $data['preview'] = $attachment['image'] ?? null;
170 $data['description'] = $attachment['name'] ?? null;
172 Post\Media::insert($data);
176 * Store attachment data
178 * @param array $activity
181 private static function storeAttachments(array $activity, array $item)
183 if (empty($activity['attachments'])) {
187 foreach ($activity['attachments'] as $attach) {
188 self::storeAttachmentAsMedia($item['uri-id'], $attach);
193 * Store question data
195 * @param array $activity
198 private static function storeQuestion(array $activity, array $item)
200 if (empty($activity['question'])) {
203 $question = ['multiple' => $activity['question']['multiple']];
205 if (!empty($activity['question']['voters'])) {
206 $question['voters'] = $activity['question']['voters'];
209 if (!empty($activity['question']['end-time'])) {
210 $question['end-time'] = DateTimeFormat::utc($activity['question']['end-time']);
213 Post\Question::update($item['uri-id'], $question);
215 foreach ($activity['question']['options'] as $key => $option) {
216 $option = ['name' => $option['name'], 'replies' => $option['replies']];
217 Post\QuestionOption::update($item['uri-id'], $key, $option);
220 Logger::debug('Storing incoming question', ['type' => $activity['type'], 'uri-id' => $item['uri-id'], 'question' => $activity['question']]);
226 * @param array $activity Activity array
227 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
228 * @throws \ImagickException
230 public static function updateItem(array $activity)
232 $item = Post::selectFirst(['uri', 'uri-id', 'thr-parent', 'gravity', 'post-type', 'private'], ['uri' => $activity['id']]);
233 if (!DBA::isResult($item)) {
234 Logger::notice('No existing item, item will be created', ['uri' => $activity['id']]);
235 $item = self::createItem($activity, false);
237 Queue::remove($activity);
241 self::postItem($activity, $item);
245 $item['changed'] = DateTimeFormat::utcNow();
246 $item['edited'] = DateTimeFormat::utc($activity['updated']);
248 Post\Media::deleteByURIId($item['uri-id'], [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE, Post\Media::HTML]);
249 $item = self::processContent($activity, $item);
251 Queue::remove($activity);
255 self::storeAttachments($activity, $item);
256 self::storeQuestion($activity, $item);
258 Post\History::add($item['uri-id'], $item);
259 Item::update($item, ['uri' => $activity['id']]);
261 Queue::remove($activity);
263 if ($activity['object_type'] == 'as:Event') {
264 $posts = Post::select(['event-id', 'uid'], ["`uri` = ? AND `event-id` > ?", $activity['id'], 0]);
265 while ($post = DBA::fetch($posts)) {
266 self::updateEvent($post['event-id'], $activity);
272 * Update an existing event
274 * @param int $event_id
275 * @param array $activity
277 private static function updateEvent(int $event_id, array $activity)
279 $event = DBA::selectFirst('event', [], ['id' => $event_id]);
281 $event['edited'] = DateTimeFormat::utc($activity['updated']);
282 $event['summary'] = HTML::toBBCode($activity['name']);
283 $event['desc'] = HTML::toBBCode($activity['content']);
284 if (!empty($activity['start-time'])) {
285 $event['start'] = DateTimeFormat::utc($activity['start-time']);
287 if (!empty($activity['end-time'])) {
288 $event['finish'] = DateTimeFormat::utc($activity['end-time']);
290 $event['nofinish'] = empty($event['finish']);
291 $event['location'] = $activity['location'];
293 Logger::info('Updating event', ['uri' => $activity['id'], 'id' => $event_id]);
294 Event::store($event);
298 * Prepares data for a message
300 * @param array $activity Activity array
301 * @param bool $fetch_parents
303 * @return array Internal item
305 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
306 * @throws \ImagickException
308 public static function createItem(array $activity, bool $fetch_parents): array
311 $item['verb'] = Activity::POST;
312 $item['thr-parent'] = $activity['reply-to-id'];
314 if ($activity['reply-to-id'] == $activity['id']) {
315 $item['gravity'] = Item::GRAVITY_PARENT;
316 $item['object-type'] = Activity\ObjectType::NOTE;
318 $item['gravity'] = Item::GRAVITY_COMMENT;
319 $item['object-type'] = Activity\ObjectType::COMMENT;
322 if (!empty($activity['conversation'])) {
323 $item['conversation'] = $activity['conversation'];
324 } elseif (!empty($activity['context'])) {
325 $item['conversation'] = $activity['context'];
328 if (!empty($item['conversation'])) {
329 $conversation = Post::selectFirstThread(['uri'], ['conversation' => $item['conversation']]);
330 if (!empty($conversation)) {
331 Logger::debug('Got conversation', ['conversation' => $item['conversation'], 'parent' => $conversation]);
332 $item['parent-uri'] = $conversation['uri'];
333 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
339 Logger::debug('Create Item', ['id' => $activity['id'], 'conversation' => $item['conversation'] ?? '']);
340 if (empty($activity['author']) && empty($activity['actor'])) {
341 Logger::notice('Missing author and actor. We quit here.', ['activity' => $activity]);
342 Queue::remove($activity);
346 if (!in_array(0, $activity['receiver']) || !DI::config()->get('system', 'fetch_parents')) {
347 $fetch_parents = false;
350 if ($fetch_parents && empty($activity['directmessage']) && ($activity['id'] != $activity['reply-to-id']) && !Post::exists(['uri' => $activity['reply-to-id']])) {
351 $result = self::fetchParent($activity, !empty($conversation));
352 if (!empty($result) && ($item['thr-parent'] != $result) && Post::exists(['uri' => $result])) {
353 $item['thr-parent'] = $result;
357 $item['diaspora_signed_text'] = $activity['diaspora:comment'] ?? '';
359 if (empty($conversation) && empty($activity['directmessage']) && ($item['gravity'] != Item::GRAVITY_PARENT) && !Post::exists(['uri' => $item['thr-parent']])) {
360 Logger::notice('Parent not found, message will be discarded.', ['thr-parent' => $item['thr-parent']]);
361 if (!$fetch_parents) {
362 Queue::remove($activity);
367 $item['network'] = Protocol::ACTIVITYPUB;
368 $item['author-link'] = $activity['author'];
369 $item['author-id'] = Contact::getIdForURL($activity['author']);
370 $item['owner-link'] = $activity['actor'];
371 $item['owner-id'] = Contact::getIdForURL($activity['actor']);
373 if (in_array(0, $activity['receiver']) && !empty($activity['unlisted'])) {
374 $item['private'] = Item::UNLISTED;
375 } elseif (in_array(0, $activity['receiver'])) {
376 $item['private'] = Item::PUBLIC;
378 $item['private'] = Item::PRIVATE;
381 if (!empty($activity['raw'])) {
382 $item['source'] = $activity['raw'];
385 $item['protocol'] = Conversation::PARCEL_ACTIVITYPUB;
387 if (isset($activity['push'])) {
388 $item['direction'] = $activity['push'] ? Conversation::PUSH : Conversation::PULL;
391 if (!empty($activity['from-relay'])) {
392 $item['direction'] = Conversation::RELAY;
395 if ($activity['object_type'] == 'as:Article') {
396 $item['post-type'] = Item::PT_ARTICLE;
397 } elseif ($activity['object_type'] == 'as:Audio') {
398 $item['post-type'] = Item::PT_AUDIO;
399 } elseif ($activity['object_type'] == 'as:Document') {
400 $item['post-type'] = Item::PT_DOCUMENT;
401 } elseif ($activity['object_type'] == 'as:Event') {
402 $item['post-type'] = Item::PT_EVENT;
403 } elseif ($activity['object_type'] == 'as:Image') {
404 $item['post-type'] = Item::PT_IMAGE;
405 } elseif ($activity['object_type'] == 'as:Page') {
406 $item['post-type'] = Item::PT_PAGE;
407 } elseif ($activity['object_type'] == 'as:Question') {
408 $item['post-type'] = Item::PT_POLL;
409 } elseif ($activity['object_type'] == 'as:Video') {
410 $item['post-type'] = Item::PT_VIDEO;
412 $item['post-type'] = Item::PT_NOTE;
415 $item['isGroup'] = false;
417 if (!empty($activity['thread-completion'])) {
418 if ($activity['thread-completion'] != $item['owner-id']) {
419 $actor = Contact::getById($activity['thread-completion'], ['url']);
420 $item['causer-link'] = $actor['url'];
421 $item['causer-id'] = $activity['thread-completion'];
422 Logger::info('Use inherited actor as causer.', ['id' => $item['owner-id'], 'activity' => $activity['thread-completion'], 'owner' => $item['owner-link'], 'actor' => $actor['url']]);
424 // Store the original actor in the "causer" fields to enable the check for ignored or blocked contacts
425 $item['causer-link'] = $item['owner-link'];
426 $item['causer-id'] = $item['owner-id'];
427 Logger::info('Use actor as causer.', ['id' => $item['owner-id'], 'actor' => $item['owner-link']]);
430 $item['owner-link'] = $item['author-link'];
431 $item['owner-id'] = $item['author-id'];
434 if (!$item['isGroup'] && !empty($activity['receiver_urls']['as:audience'])) {
435 foreach ($activity['receiver_urls']['as:audience'] as $audience) {
436 $actor = APContact::getByURL($audience, false);
437 if (($actor['type'] ?? 'Person') == 'Group') {
438 Logger::debug('Group post detected via audience.', ['audience' => $audience, 'actor' => $activity['actor'], 'author' => $activity['author']]);
439 $item['isGroup'] = true;
440 $item['group-link'] = $item['owner-link'] = $audience;
441 $item['owner-id'] = Contact::getIdForURL($audience);
446 $owner = APContact::getByURL($item['owner-link'], false);
449 if (!$item['isGroup'] && (($owner['type'] ?? 'Person') == 'Group')) {
450 Logger::debug('Group post detected via owner.', ['actor' => $activity['actor'], 'author' => $activity['author']]);
451 $item['isGroup'] = true;
452 $item['group-link'] = $item['owner-link'];
453 } elseif (!empty($item['causer-link'])) {
454 $causer = APContact::getByURL($item['causer-link'], false);
457 if (!$item['isGroup'] && (($causer['type'] ?? 'Person') == 'Group')) {
458 Logger::debug('Group post detected via causer.', ['actor' => $activity['actor'], 'author' => $activity['author'], 'causer' => $item['causer-link']]);
459 $item['isGroup'] = true;
460 $item['group-link'] = $item['causer-link'];
463 if (!empty($item['group-link']) && empty($item['causer-link'])) {
464 $item['causer-link'] = $item['group-link'];
465 $item['causer-id'] = Contact::getIdForURL($item['causer-link']);
468 $item['uri'] = $activity['id'];
470 if (empty($activity['published']) || empty($activity['updated'])) {
471 DI::logger()->notice('published or updated keys are empty for activity', ['activity' => $activity]);
474 $item['created'] = DateTimeFormat::utc($activity['published'] ?? 'now');
475 $item['edited'] = DateTimeFormat::utc($activity['updated'] ?? 'now');
476 $guid = $activity['sc:identifier'] ?: self::getGUIDByURL($item['uri']);
477 $item['guid'] = $activity['diaspora:guid'] ?: $guid;
479 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
480 if (empty($item['uri-id'])) {
481 Logger::warning('Unable to get a uri-id for an item uri', ['uri' => $item['uri'], 'guid' => $item['guid']]);
485 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
487 $item = self::processContent($activity, $item);
489 Logger::info('Message was not processed');
490 Queue::remove($activity);
494 $item['plink'] = $activity['alternate-url'] ?? $item['uri'];
496 self::storeAttachments($activity, $item);
497 self::storeQuestion($activity, $item);
499 // We received the post via AP, so we set the protocol of the server to AP
500 $contact = Contact::getById($item['author-id'], ['gsid']);
501 if (!empty($contact['gsid'])) {
502 GServer::setProtocol($contact['gsid'], Post\DeliveryData::ACTIVITYPUB);
505 if ($item['author-id'] != $item['owner-id']) {
506 $contact = Contact::getById($item['owner-id'], ['gsid']);
507 if (!empty($contact['gsid'])) {
508 GServer::setProtocol($contact['gsid'], Post\DeliveryData::ACTIVITYPUB);
516 * Fetch and process parent posts for the given activity
518 * @param array $activity
519 * @param bool $in_background
523 private static function fetchParent(array $activity, bool $in_background = false): string
525 if (self::isFetched($activity['reply-to-id'])) {
526 Logger::info('Id is already fetched', ['id' => $activity['reply-to-id']]);
530 self::addActivityId($activity['reply-to-id']);
532 $completion = $activity['completion-mode'] ?? Receiver::COMPLETION_NONE;
534 if (DI::config()->get('system', 'decoupled_receiver') && ($completion != Receiver::COMPLETION_MANUAL)) {
535 $in_background = true;
538 $recursion_depth = $activity['recursion-depth'] ?? 0;
540 if (!$in_background && ($recursion_depth < DI::config()->get('system', 'max_recursion_depth'))) {
541 Logger::info('Parent not found. Try to refetch it.', ['completion' => $completion, 'recursion-depth' => $recursion_depth, 'parent' => $activity['reply-to-id']]);
542 $result = self::fetchMissingActivity($activity['reply-to-id'], $activity, '', Receiver::COMPLETION_AUTO);
543 if (empty($result) && self::isActivityGone($activity['reply-to-id'])) {
544 Logger::notice('The activity is gone, the queue entry will be deleted', ['parent' => $activity['reply-to-id']]);
545 if (!empty($activity['entry-id'])) {
546 Queue::deleteById($activity['entry-id']);
548 } elseif (!empty($result)) {
549 $post = Post::selectFirstPost(['uri'], ['uri' => [$result, $activity['reply-to-id']]]);
550 if (!empty($post['uri'])) {
551 Logger::info('The activity has been fetched and created.', ['result' => $result, 'uri' => $post['uri']]);
554 Logger::notice('The activity exists but has not been created, the queue entry will be deleted.', ['parent' => $result]);
555 if (!empty($activity['entry-id'])) {
556 Queue::deleteById($activity['entry-id']);
561 } elseif (self::isActivityGone($activity['reply-to-id'])) {
562 Logger::notice('The activity is gone. We will not spawn a worker. The queue entry will be deleted', ['parent' => $activity['reply-to-id']]);
563 if ($in_background) {
564 // fetching in background is done for all activities where we have got the conversation
565 // There we only delete the single activity and not the whole thread since we can store the
566 // other posts in the thread even with missing posts.
567 Queue::remove($activity);
568 } elseif (!empty($activity['entry-id'])) {
569 Queue::deleteById($activity['entry-id']);
572 } elseif ($in_background) {
573 Logger::notice('Fetching is done in the background.', ['parent' => $activity['reply-to-id']]);
575 Logger::notice('Recursion level is too high.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
578 if (!Fetch::hasWorker($activity['reply-to-id'])) {
579 Logger::notice('Fetching is done by worker.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
580 Fetch::add($activity['reply-to-id']);
581 $activity['recursion-depth'] = 0;
582 $wid = Worker::add(Worker::PRIORITY_HIGH, 'FetchMissingActivity', $activity['reply-to-id'], $activity, '', Receiver::COMPLETION_ASYNC);
583 Fetch::setWorkerId($activity['reply-to-id'], $wid);
585 Logger::debug('Activity will already be fetched via a worker.', ['url' => $activity['reply-to-id']]);
592 * Check if a given activity is no longer available
598 public static function isActivityGone(string $url): bool
600 if (Network::isUrlBlocked($url)) {
605 $curlResult = HTTPSignature::fetchRaw($url, 0);
606 } catch (\Exception $exception) {
607 Logger::notice('Error fetching url', ['url' => $url, 'exception' => $exception]);
611 // @todo To ensure that the remote system is working correctly, we can check if the "Content-Type" contains JSON
612 if (in_array($curlResult->getReturnCode(), [401, 404])) {
616 if ($curlResult->isSuccess()) {
617 $object = json_decode($curlResult->getBody(), true);
618 if (!empty($object)) {
619 $activity = JsonLD::compact($object);
620 if (JsonLD::fetchElement($activity, '@type') == 'as:Tombstone') {
624 } elseif ($curlResult->getReturnCode() == 0) {
625 $host = parse_url($url, PHP_URL_HOST);
626 if (!(filter_var($host, FILTER_VALIDATE_IP) || @dns_get_record($host . '.', DNS_A + DNS_AAAA))) {
636 * @param array $activity
637 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
638 * @throws \ImagickException
640 public static function deleteItem(array $activity)
642 $owner = Contact::getIdForURL($activity['actor']);
644 Logger::info('Deleting item', ['object' => $activity['object_id'], 'owner' => $owner]);
645 Item::markForDeletion(['uri' => $activity['object_id'], 'owner-id' => $owner]);
646 Queue::remove($activity);
650 * Prepare the item array for an activity
652 * @param array $activity Activity array
653 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
654 * @throws \ImagickException
656 public static function addTag(array $activity)
658 if (empty($activity['object_content']) || empty($activity['object_id'])) {
662 foreach ($activity['receiver'] as $receiver) {
663 $item = Post::selectFirst(['id', 'uri-id', 'origin', 'author-link'], ['uri' => $activity['target_id'], 'uid' => $receiver]);
664 if (!DBA::isResult($item)) {
665 // We don't fetch missing content for this purpose
669 if (($item['author-link'] != $activity['actor']) && !$item['origin']) {
670 Logger::info('Not origin, not from the author, skipping update', ['id' => $item['id'], 'author' => $item['author-link'], 'actor' => $activity['actor']]);
674 Tag::store($item['uri-id'], Tag::HASHTAG, $activity['object_content'], $activity['object_id']);
675 Logger::info('Tagged item', ['id' => $item['id'], 'tag' => $activity['object_content'], 'uri' => $activity['target_id'], 'actor' => $activity['actor']]);
680 * Prepare the item array for an activity
682 * @param array $activity Activity array
683 * @param string $verb Activity verb
684 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
685 * @throws \ImagickException
687 public static function createActivity(array $activity, string $verb)
689 $activity['reply-to-id'] = $activity['object_id'];
690 $item = self::createItem($activity, false);
692 Logger::debug('Activity was not prepared', ['id' => $activity['object_id']]);
696 $item['verb'] = $verb;
697 $item['thr-parent'] = $activity['object_id'];
698 $item['gravity'] = Item::GRAVITY_ACTIVITY;
699 unset($item['post-type']);
700 $item['object-type'] = Activity\ObjectType::NOTE;
702 if (!empty($activity['content'])) {
703 $item['body'] = HTML::toBBCode($activity['content']);
706 $item['diaspora_signed_text'] = $activity['diaspora:like'] ?? '';
708 self::postItem($activity, $item);
712 * Fetch the Uri-Id of a post for the "featured" collection
714 * @param array $activity
717 private static function getUriIdForFeaturedCollection(array $activity)
719 $actor = APContact::getByURL($activity['actor']);
724 // Refetch the account when the "featured" collection is missing.
725 // This can be removed in a future version (end of 2022 should be good).
726 if (empty($actor['featured'])) {
727 $actor = APContact::getByURL($activity['actor'], true);
733 $parent = Post::selectFirst(['uri-id', 'author-id'], ['uri' => $activity['object_id']]);
734 if (empty($parent['uri-id'])) {
735 if (self::fetchMissingActivity($activity['object_id'], $activity, '', Receiver::COMPLETION_AUTO)) {
736 $parent = Post::selectFirst(['uri-id'], ['uri' => $activity['object_id']]);
740 if (!empty($parent['uri-id'])) {
748 * Add a post to the "Featured" collection
750 * @param array $activity
752 public static function addToFeaturedCollection(array $activity)
754 $post = self::getUriIdForFeaturedCollection($activity);
755 if (empty($post) || empty($post['author-id'])) {
756 Queue::remove($activity);
760 Logger::debug('Add post to featured collection', ['post' => $post]);
762 Post\Collection::add($post['uri-id'], Post\Collection::FEATURED, $post['author-id']);
763 Queue::remove($activity);
767 * Remove a post to the "Featured" collection
769 * @param array $activity
771 public static function removeFromFeaturedCollection(array $activity)
773 $post = self::getUriIdForFeaturedCollection($activity);
775 Queue::remove($activity);
779 Logger::debug('Remove post from featured collection', ['post' => $post]);
781 Post\Collection::remove($post['uri-id'], Post\Collection::FEATURED);
782 Queue::remove($activity);
788 * @param array $activity Activity array
791 * @return int event id
794 public static function createEvent(array $activity, array $item): int
796 $event['summary'] = HTML::toBBCode($activity['name'] ?: $activity['summary']);
797 $event['desc'] = HTML::toBBCode($activity['content'] ?? '');
798 if (!empty($activity['start-time'])) {
799 $event['start'] = DateTimeFormat::utc($activity['start-time']);
801 if (!empty($activity['end-time'])) {
802 $event['finish'] = DateTimeFormat::utc($activity['end-time']);
804 $event['nofinish'] = empty($event['finish']);
805 $event['location'] = $activity['location'];
806 $event['cid'] = $item['contact-id'];
807 $event['uid'] = $item['uid'];
808 $event['uri'] = $item['uri'];
809 $event['edited'] = $item['edited'];
810 $event['private'] = $item['private'];
811 $event['guid'] = $item['guid'];
812 $event['plink'] = $item['plink'];
813 $event['network'] = $item['network'];
814 $event['protocol'] = $item['protocol'];
815 $event['direction'] = $item['direction'];
816 $event['source'] = $item['source'];
818 $ev = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
819 if (DBA::isResult($ev)) {
820 $event['id'] = $ev['id'];
823 $event_id = Event::store($event);
825 Logger::info('Event was stored', ['id' => $event_id]);
831 * Process the content
833 * @param array $activity Activity array
835 * @return array|bool Returns the item array or false if there was an unexpected occurrence
838 private static function processContent(array $activity, array $item)
840 if (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/markdown')) {
841 $item['title'] = strip_tags($activity['name'] ?? '');
842 $content = Markdown::toBBCode($activity['content']);
843 } elseif (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/bbcode')) {
844 $item['title'] = $activity['name'];
845 $content = $activity['content'];
847 // By default assume "text/html"
848 $item['title'] = HTML::toBBCode($activity['name'] ?? '');
849 $content = HTML::toBBCode($activity['content'] ?? '');
852 $item['title'] = trim(BBCode::toPlaintext($item['title']));
854 if (!empty($activity['languages'])) {
855 $item['language'] = self::processLanguages($activity['languages']);
858 $item['transmitted-languages'] = $activity['transmitted-languages'];
860 if (!empty($activity['emojis'])) {
861 $content = self::replaceEmojis($item['uri-id'], $content, $activity['emojis']);
864 $content = self::addMentionLinks($content, $activity['tags']);
866 if (!empty($activity['quote-url'])) {
867 $id = Item::fetchByLink($activity['quote-url'], 0, ActivityPub\Receiver::COMPLETION_ASYNC);
869 $shared_item = Post::selectFirst(['uri-id'], ['id' => $id]);
870 $item['quote-uri-id'] = $shared_item['uri-id'];
871 } elseif ($uri_id = ItemURI::getIdByURI($activity['quote-url'], false)) {
872 Logger::info('Quote was not fetched but the uri-id existed', ['guid' => $item['guid'], 'uri-id' => $item['uri-id'], 'quote' => $activity['quote-url'], 'uri-id' => $uri_id]);
873 $item['quote-uri-id'] = $uri_id;
875 Logger::info('Quote was not fetched', ['guid' => $item['guid'], 'uri-id' => $item['uri-id'], 'quote' => $activity['quote-url']]);
879 if (!empty($activity['source'])) {
880 $item['body'] = $activity['source'];
881 $item['raw-body'] = $content;
883 $quote_uri_id = Item::getQuoteUriId($item['body']);
884 if (empty($item['quote-uri-id']) && !empty($quote_uri_id)) {
885 $item['quote-uri-id'] = $quote_uri_id;
888 $item['body'] = BBCode::removeSharedData($item['body']);
890 $parent_uri = $item['parent-uri'] ?? $item['thr-parent'];
891 if (empty($activity['directmessage']) && ($parent_uri != $item['uri']) && ($item['gravity'] == Item::GRAVITY_COMMENT)) {
892 $parent = Post::selectFirst(['id', 'uri-id', 'private', 'author-link', 'alias'], ['uri' => $parent_uri]);
893 if (!DBA::isResult($parent)) {
894 Logger::warning('Unknown parent item.', ['uri' => $parent_uri]);
897 $content = self::removeImplicitMentionsFromBody($content, $parent);
899 $item['content-warning'] = HTML::toBBCode($activity['summary'] ?? '');
900 $item['raw-body'] = $item['body'] = $content;
903 if (!empty($item['author-id']) && ($item['author-id'] == $item['owner-id'])) {
904 foreach (Tag::getFromBody($item['body'], Tag::TAG_CHARACTER[Tag::EXCLUSIVE_MENTION]) as $tag) {
905 $actor = APContact::getByURL($tag[2], false);
906 if (($actor['type'] ?? 'Person') == 'Group') {
907 Logger::debug('Group post detected via exclusive mention.', ['mention' => $actor['url'], 'actor' => $activity['actor'], 'author' => $activity['author']]);
908 $item['isGroup'] = true;
909 $item['group-link'] = $item['owner-link'] = $actor['url'];
910 $item['owner-id'] = Contact::getIdForURL($actor['url']);
916 self::storeFromBody($item);
917 self::storeTags($item['uri-id'], $activity['tags']);
919 self::storeReceivers($item['uri-id'], $activity['receiver_urls'] ?? []);
921 $item['location'] = $activity['location'];
923 if (!empty($activity['latitude']) && !empty($activity['longitude'])) {
924 $item['coord'] = $activity['latitude'] . ' ' . $activity['longitude'];
927 $item['app'] = $activity['generator'];
933 * Store hashtags and mentions
937 private static function storeFromBody(array $item)
939 // Make sure to delete all existing tags (can happen when called via the update functionality)
940 DBA::delete('post-tag', ['uri-id' => $item['uri-id']]);
942 Tag::storeFromBody($item['uri-id'], $item['body'], '@!');
946 * Generate a GUID out of an URL of an ActivityPub post.
948 * @param string $url message URL
949 * @return string with GUID
951 private static function getGUIDByURL(string $url): string
953 $parsed = parse_url($url);
955 $host_hash = hash('crc32', $parsed['host']);
957 unset($parsed["scheme"]);
958 unset($parsed["host"]);
960 $path = implode("/", $parsed);
962 return $host_hash . '-'. hash('fnv164', $path) . '-'. hash('joaat', $path);
966 * Checks if an incoming message is wanted
968 * @param array $activity
970 * @return boolean Is the message wanted?
972 private static function isSolicitedMessage(array $activity, array $item): bool
974 // The checks are split to improve the support when searching why a message was accepted.
975 if (count($activity['receiver']) != 1) {
976 // The message has more than one receiver, so it is wanted.
977 Logger::debug('Message has got several receivers - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
981 if ($item['private'] == Item::PRIVATE) {
982 // We only look at public posts here. Private posts are expected to be intentionally posted to the single receiver.
983 Logger::debug('Message is private - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
987 if (!empty($activity['from-relay'])) {
988 // We check relay posts at another place. When it arrived here, the message is already checked.
989 Logger::debug('Message is a relay post that is already checked - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
993 if (in_array($activity['completion-mode'] ?? Receiver::COMPLETION_NONE, [Receiver::COMPLETION_MANUAL, Receiver::COMPLETION_ANNOUNCE])) {
994 // Manual completions and completions caused by reshares are allowed without any further checks.
995 Logger::debug('Message is in completion mode - accepted', ['mode' => $activity['completion-mode'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
999 if ($item['gravity'] != Item::GRAVITY_PARENT) {
1000 // We cannot reliably check at this point if a comment or activity belongs to an accepted post or needs to be fetched
1001 // This can possibly be improved in the future.
1002 Logger::debug('Message is no parent - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
1006 $tags = array_column(Tag::getByURIId($item['uri-id'], [Tag::HASHTAG]), 'name');
1007 if (Relay::isSolicitedPost($tags, $item['title'] . ' ' . ($item['content-warning'] ?? '') . ' ' . $item['body'], $item['author-id'], $item['uri'], Protocol::ACTIVITYPUB, $activity['thread-completion'] ?? 0)) {
1008 Logger::debug('Post is accepted because of the relay settings', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
1016 * Creates an item post
1018 * @param array $activity Activity data
1019 * @param array $item item array
1020 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1021 * @throws \ImagickException
1023 public static function postItem(array $activity, array $item)
1031 ksort($activity['receiver']);
1033 if (!self::isSolicitedMessage($activity, $item)) {
1034 DBA::delete('item-uri', ['id' => $item['uri-id']]);
1035 if (!empty($activity['entry-id'])) {
1036 Queue::deleteById($activity['entry-id']);
1041 foreach ($activity['receiver'] as $receiver) {
1042 if ($receiver == -1) {
1046 if (($receiver != 0) && empty($item['parent-uri-id']) && !empty($item['thr-parent-id'])) {
1047 $parent = Post::selectFirst(['parent-uri-id', 'parent-uri'], ['uri-id' => $item['thr-parent-id'], 'uid' => [0, $receiver]]);
1048 if (!empty($parent['parent-uri-id'])) {
1049 $item['parent-uri-id'] = $parent['parent-uri-id'];
1050 $item['parent-uri'] = $parent['parent-uri'];
1054 $item['uid'] = $receiver;
1056 $type = $activity['reception_type'][$receiver] ?? Receiver::TARGET_UNKNOWN;
1058 case Receiver::TARGET_TO:
1059 $item['post-reason'] = Item::PR_TO;
1061 case Receiver::TARGET_CC:
1062 $item['post-reason'] = Item::PR_CC;
1064 case Receiver::TARGET_BTO:
1065 $item['post-reason'] = Item::PR_BTO;
1067 case Receiver::TARGET_BCC:
1068 $item['post-reason'] = Item::PR_BCC;
1070 case Receiver::TARGET_AUDIENCE:
1071 $item['post-reason'] = Item::PR_AUDIENCE;
1073 case Receiver::TARGET_FOLLOWER:
1074 $item['post-reason'] = Item::PR_FOLLOWER;
1076 case Receiver::TARGET_ANSWER:
1077 $item['post-reason'] = Item::PR_COMMENT;
1079 case Receiver::TARGET_GLOBAL:
1080 $item['post-reason'] = Item::PR_GLOBAL;
1083 $item['post-reason'] = Item::PR_NONE;
1086 $item['post-reason'] = Item::getPostReason($item);
1088 if (in_array($item['post-reason'], [Item::PR_GLOBAL, Item::PR_NONE])) {
1089 if (!empty($activity['from-relay'])) {
1090 $item['post-reason'] = Item::PR_RELAY;
1091 } elseif (!empty($activity['thread-completion'])) {
1092 $item['post-reason'] = Item::PR_FETCHED;
1093 } elseif (!empty($activity['push'])) {
1094 $item['post-reason'] = Item::PR_PUSHED;
1096 } elseif (($item['post-reason'] == Item::PR_FOLLOWER) && !empty($activity['from-relay'])) {
1097 // When a post arrives via a relay and we follow the author, we have to override the causer.
1098 // Otherwise the system assumes that we follow the relay. (See "addRowInformation")
1099 Logger::debug('Relay post for follower', ['receiver' => $receiver, 'guid' => $item['guid'], 'relay' => $activity['from-relay']]);
1100 $item['causer-id'] = ($item['gravity'] == Item::GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
1103 if ($item['isGroup']) {
1104 $item['contact-id'] = Contact::getIdForURL($item['group-link'], $receiver);
1106 $item['contact-id'] = Contact::getIdForURL($item['author-link'], $receiver);
1109 if (($receiver != 0) && empty($item['contact-id'])) {
1110 $item['contact-id'] = Contact::getIdForURL($activity['author']);
1113 if (!empty($activity['directmessage']) && self::postMail($item)) {
1114 if (!empty($item['source']) && DI::config()->get('debug', 'store_source')) {
1115 Post\Activity::insert($item['uri-id'], $item['source']);
1121 if (($receiver != 0) && ($item['gravity'] == Item::GRAVITY_PARENT) && !in_array($item['post-reason'], [Item::PR_FOLLOWER, Item::PR_TAG, item::PR_TO, Item::PR_CC, Item::PR_AUDIENCE])) {
1122 if (!$item['isGroup']) {
1123 if ($item['post-reason'] == Item::PR_BCC) {
1124 Logger::info('Top level post via BCC from a non sharer, ignoring', ['uid' => $receiver, 'contact' => $item['contact-id'], 'url' => $item['uri']]);
1128 if ((DI::pConfig()->get($receiver, 'system', 'accept_only_sharer') != Item::COMPLETION_LIKE)
1129 && in_array($activity['thread-children-type'] ?? '', Receiver::ACTIVITY_TYPES)) {
1130 Logger::info('Top level post from thread completion from a non sharer had been initiated via an activity, ignoring',
1131 ['type' => $activity['thread-children-type'], 'user' => $item['uid'], 'causer' => $item['causer-link'], 'author' => $activity['author'], 'url' => $item['uri']]);
1137 $user = User::getById($receiver, ['account-type']);
1138 if (!empty($user['account-type'])) {
1139 $isGroup = ($user['account-type'] == User::ACCOUNT_TYPE_COMMUNITY);
1142 if ((DI::pConfig()->get($receiver, 'system', 'accept_only_sharer') == Item::COMPLETION_NONE)
1143 && ((!$isGroup && !$item['isGroup'] && ($activity['type'] != 'as:Announce'))
1144 || !Contact::isSharingByURL($activity['actor'], $receiver))) {
1145 Logger::info('Actor is a non sharer, is no group or it is no announce', ['uid' => $receiver, 'actor' => $activity['actor'], 'url' => $item['uri'], 'type' => $activity['type']]);
1149 Logger::info('Accepting post', ['uid' => $receiver, 'url' => $item['uri']]);
1152 if (!self::hasParents($item, $receiver)) {
1156 if (($item['gravity'] != Item::GRAVITY_ACTIVITY) && ($activity['object_type'] == 'as:Event')) {
1157 $event_id = self::createEvent($activity, $item);
1159 $item = Event::getItemArrayForImportedId($event_id, $item);
1162 $item_id = Item::insert($item);
1164 Logger::info('Item insertion successful', ['user' => $item['uid'], 'item_id' => $item_id]);
1167 Logger::notice('Item insertion aborted', ['uri' => $item['uri'], 'uid' => $item['uid']]);
1168 if (($item['uid'] == 0) && (count($activity['receiver']) > 1)) {
1169 Logger::info('Public item was aborted. We skip for all users.', ['uri' => $item['uri']]);
1174 if ($item['uid'] == 0) {
1179 Queue::remove($activity);
1181 if ($success && Queue::hasChildren($item['uri']) && Post::exists(['uri' => $item['uri']])) {
1182 Queue::processReplyByUri($item['uri']);
1185 // Store send a follow request for every reshare - but only when the item had been stored
1186 if ($stored && ($item['private'] != Item::PRIVATE) && ($item['gravity'] == Item::GRAVITY_PARENT) && !empty($item['author-link']) && ($item['author-link'] != $item['owner-link'])) {
1187 $author = APContact::getByURL($item['owner-link'], false);
1188 // We send automatic follow requests for reshared messages. (We don't need though for group posts)
1189 if ($author['type'] != 'Group') {
1190 Logger::info('Send follow request', ['uri' => $item['uri'], 'stored' => $stored, 'to' => $item['author-link']]);
1191 ActivityPub\Transmitter::sendFollowObject($item['uri'], $item['author-link']);
1197 * Checks if there are parent posts for the given receiver.
1198 * If not, then the system will try to add them.
1200 * @param array $item
1201 * @param integer $receiver
1204 private static function hasParents(array $item, int $receiver)
1206 if (($receiver == 0) || ($item['gravity'] == Item::GRAVITY_PARENT)) {
1210 $fields = ['causer-id' => $item['causer-id'] ?? $item['author-id'], 'post-reason' => Item::PR_FETCHED];
1214 if ($item['verb'] != Activity::ANNOUNCE) {
1215 switch (DI::pConfig()->get($receiver, 'system', 'accept_only_sharer')) {
1216 case Item::COMPLETION_COMMENT:
1217 $add_parent = ($item['gravity'] != Item::GRAVITY_ACTIVITY);
1220 case Item::COMPLETION_NONE:
1221 $add_parent = false;
1227 $add_parent = Contact::isSharing($fields['causer-id'], $receiver);
1228 if (!$add_parent && ($item['author-id'] != $fields['causer-id'])) {
1229 $add_parent = Contact::isSharing($item['author-id'], $receiver);
1231 if (!$add_parent && !in_array($item['owner-id'], [$fields['causer-id'], $item['author-id']])) {
1232 $add_parent = Contact::isSharing($item['owner-id'], $receiver);
1236 $has_parents = false;
1238 if (($item['private'] != Item::PRIVATE) && !empty($item['parent-uri-id'])) {
1239 if (Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $receiver])) {
1240 $has_parents = true;
1241 } elseif ($add_parent && Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1242 $stored = Item::storeForUserByUriId($item['parent-uri-id'], $receiver, $fields);
1243 $has_parents = (bool)$stored;
1245 Logger::notice('Inserted missing parent post', ['stored' => $stored, 'uid' => $receiver, 'parent' => $item['parent-uri']]);
1247 Logger::notice('Parent could not be added.', ['uid' => $receiver, 'uri' => $item['uri'], 'parent' => $item['parent-uri']]);
1250 } elseif ($add_parent) {
1251 Logger::debug('Parent does not exist.', ['uid' => $receiver, 'uri' => $item['uri'], 'parent' => $item['parent-uri']]);
1253 Logger::debug('Parent should not be added.', ['uid' => $receiver, 'gravity' => $item['gravity'], 'verb' => $item['verb'], 'guid' => $item['guid'], 'uri' => $item['uri'], 'parent' => $item['parent-uri']]);
1257 if (($item['private'] == Item::PRIVATE) || empty($item['parent-uri-id']) || ($item['thr-parent-id'] != $item['parent-uri-id'])) {
1258 if (Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $receiver])) {
1259 $has_parents = true;
1260 } elseif (($has_parents || $add_parent) && Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => 0])) {
1261 $stored = Item::storeForUserByUriId($item['thr-parent-id'], $receiver, $fields);
1262 $has_parents = $has_parents || (bool)$stored;
1264 Logger::notice('Inserted missing thread parent post', ['stored' => $stored, 'uid' => $receiver, 'thread-parent' => $item['thr-parent']]);
1266 Logger::notice('Thread parent could not be added.', ['uid' => $receiver, 'uri' => $item['uri'], 'thread-parent' => $item['thr-parent']]);
1268 } elseif ($add_parent) {
1269 Logger::debug('Thread parent does not exist.', ['uid' => $receiver, 'uri' => $item['uri'], 'thread-parent' => $item['thr-parent']]);
1271 Logger::debug('Thread parent should not be added.', ['uid' => $receiver, 'gravity' => $item['gravity'], 'verb' => $item['verb'], 'guid' => $item['guid'], 'uri' => $item['uri'], 'thread-parent' => $item['thr-parent']]);
1275 return $has_parents;
1279 * Store tags and mentions into the tag table
1281 * @param integer $uriid
1282 * @param array $tags
1284 private static function storeTags(int $uriid, array $tags = null)
1286 foreach ($tags as $tag) {
1287 if (empty($tag['name']) || empty($tag['type']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
1291 $hash = substr($tag['name'], 0, 1);
1293 if ($tag['type'] == 'Mention') {
1294 if (in_array($hash, [Tag::TAG_CHARACTER[Tag::MENTION],
1295 Tag::TAG_CHARACTER[Tag::EXCLUSIVE_MENTION],
1296 Tag::TAG_CHARACTER[Tag::IMPLICIT_MENTION]])) {
1297 $tag['name'] = substr($tag['name'], 1);
1299 $type = Tag::IMPLICIT_MENTION;
1301 if (!empty($tag['href'])) {
1302 $apcontact = APContact::getByURL($tag['href']);
1303 if (!empty($apcontact['name']) || !empty($apcontact['nick'])) {
1304 $tag['name'] = $apcontact['name'] ?: $apcontact['nick'];
1307 } elseif ($tag['type'] == 'Hashtag') {
1308 if ($hash == Tag::TAG_CHARACTER[Tag::HASHTAG]) {
1309 $tag['name'] = substr($tag['name'], 1);
1311 $type = Tag::HASHTAG;
1314 if (empty($tag['name'])) {
1318 Tag::store($uriid, $type, $tag['name'], $tag['href']);
1322 public static function storeReceivers(int $uriid, array $receivers)
1324 foreach (['as:to' => Tag::TO, 'as:cc' => Tag::CC, 'as:bto' => Tag::BTO, 'as:bcc' => Tag::BCC, 'as:audience' => Tag::AUDIENCE, 'as:attributedTo' => Tag::ATTRIBUTED] as $element => $type) {
1325 if (!empty($receivers[$element])) {
1326 foreach ($receivers[$element] as $receiver) {
1327 if ($receiver == ActivityPub::PUBLIC_COLLECTION) {
1328 $name = Receiver::PUBLIC_COLLECTION;
1329 } elseif ($path = parse_url($receiver, PHP_URL_PATH)) {
1330 $name = trim($path, '/');
1331 } elseif ($host = parse_url($receiver, PHP_URL_HOST)) {
1334 Logger::warning('Unable to coerce name from receiver', ['element' => $element, 'type' => $type, 'receiver' => $receiver]);
1338 $target = Tag::getTargetType($receiver);
1339 Logger::debug('Got target type', ['type' => $target, 'url' => $receiver]);
1340 Tag::store($uriid, $type, $name, $receiver, $target);
1347 * Creates an mail post
1349 * @param array $item item array
1350 * @return int|bool New mail table row id or false on error
1351 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1353 private static function postMail(array $item): bool
1355 if (($item['gravity'] != Item::GRAVITY_PARENT) && !DBA::exists('mail', ['uri' => $item['thr-parent'], 'uid' => $item['uid']])) {
1356 Logger::info('Parent not found, mail will be discarded.', ['uid' => $item['uid'], 'uri' => $item['thr-parent']]);
1360 if (!Contact::isFollower($item['contact-id'], $item['uid']) && !Contact::isSharing($item['contact-id'], $item['uid'])) {
1361 Logger::info('Contact is not a sharer or follower, mail will be discarded.', ['item' => $item]);
1365 Logger::info('Direct Message', $item);
1368 $msg['uid'] = $item['uid'];
1370 $msg['contact-id'] = $item['contact-id'];
1372 $contact = Contact::getById($item['contact-id'], ['name', 'url', 'photo']);
1373 $msg['from-name'] = $contact['name'];
1374 $msg['from-url'] = $contact['url'];
1375 $msg['from-photo'] = $contact['photo'];
1377 $msg['uri'] = $item['uri'];
1378 $msg['created'] = $item['created'];
1380 $parent = DBA::selectFirst('mail', ['parent-uri', 'title'], ['uri' => $item['thr-parent']]);
1381 if (DBA::isResult($parent)) {
1382 $msg['parent-uri'] = $parent['parent-uri'];
1383 $msg['title'] = $parent['title'];
1385 $msg['parent-uri'] = $item['thr-parent'];
1387 if (!empty($item['title'])) {
1388 $msg['title'] = $item['title'];
1389 } elseif (!empty($item['content-warning'])) {
1390 $msg['title'] = $item['content-warning'];
1392 // Trying to generate a title out of the body
1393 $title = $item['body'];
1395 while (preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $title, $matches)) {
1396 $title = $matches[3];
1399 $title = trim(BBCode::toPlaintext($title));
1401 if (strlen($title) > 20) {
1402 $title = substr($title, 0, 20) . '...';
1405 $msg['title'] = $title;
1408 $msg['body'] = $item['body'];
1410 return Mail::insert($msg);
1414 * Fetch featured posts from a contact with the given url
1416 * @param string $url
1419 public static function fetchFeaturedPosts(string $url)
1421 Logger::info('Fetch featured posts', ['contact' => $url]);
1423 $apcontact = APContact::getByURL($url);
1424 if (empty($apcontact['featured'])) {
1425 Logger::info('Contact does not have a featured collection', ['contact' => $url]);
1429 $pcid = Contact::getIdForURL($url, 0, false);
1431 Logger::notice('Contact not found', ['contact' => $url]);
1435 $posts = Post\Collection::selectToArrayForContact($pcid, Post\Collection::FEATURED);
1436 if (!empty($posts)) {
1437 $old_featured = array_column($posts, 'uri-id');
1442 $featured = ActivityPub::fetchItems($apcontact['featured']);
1443 if (empty($featured)) {
1444 Logger::info('Contact does not have featured posts', ['contact' => $url]);
1446 foreach ($old_featured as $uri_id) {
1447 Post\Collection::remove($uri_id, Post\Collection::FEATURED);
1448 Logger::debug('Removed no longer featured post', ['uri-id' => $uri_id, 'contact' => $url]);
1456 foreach ($featured as $post) {
1457 if (empty($post['id'])) {
1460 $id = Item::fetchByLink($post['id'], 0, ActivityPub\Receiver::COMPLETION_ASYNC);
1462 $item = Post::selectFirst(['uri-id', 'featured', 'author-id'], ['id' => $id]);
1463 if (!empty($item['uri-id'])) {
1464 if (!$item['featured']) {
1465 Post\Collection::add($item['uri-id'], Post\Collection::FEATURED, $item['author-id']);
1466 Logger::debug('Added featured post', ['uri-id' => $item['uri-id'], 'contact' => $url]);
1469 Logger::debug('Post already had been featured', ['uri-id' => $item['uri-id'], 'contact' => $url]);
1473 $index = array_search($item['uri-id'], $old_featured);
1474 if (!($index === false)) {
1475 unset($old_featured[$index]);
1481 foreach ($old_featured as $uri_id) {
1482 Post\Collection::remove($uri_id, Post\Collection::FEATURED);
1483 Logger::debug('Removed no longer featured post', ['uri-id' => $uri_id, 'contact' => $url]);
1486 Logger::info('Fetched featured posts', ['new' => $new, 'old' => $old, 'contact' => $url]);
1489 public static function fetchCachedActivity(string $url, int $uid): array
1491 $cachekey = self::CACHEKEY_FETCH_ACTIVITY . $uid . ':' . hash('sha256', $url);
1492 $object = DI::cache()->get($cachekey);
1494 if (!is_null($object)) {
1495 if (!empty($object)) {
1496 Logger::debug('Fetch from cache', ['url' => $url, 'uid' => $uid]);
1498 Logger::debug('Fetch from negative cache', ['url' => $url, 'uid' => $uid]);
1503 $object = HTTPSignature::fetch($url, $uid);
1504 if (empty($object)) {
1505 Logger::notice('Activity was not fetchable, aborting.', ['url' => $url, 'uid' => $uid]);
1506 // We perform negative caching.
1507 DI::cache()->set($cachekey, [], Duration::FIVE_MINUTES);
1511 if (empty($object['id'])) {
1512 Logger::notice('Activity has got not id, aborting. ', ['url' => $url, 'object' => $object]);
1515 DI::cache()->set($cachekey, $object, Duration::FIVE_MINUTES);
1517 Logger::debug('Activity was fetched successfully', ['url' => $url, 'uid' => $uid]);
1523 * Fetches missing posts
1525 * @param string $url message URL
1526 * @param array $child activity array with the child of this message
1527 * @param string $relay_actor Relay actor
1528 * @param int $completion Completion mode, see Receiver::COMPLETION_*
1529 * @param int $uid User id that is used to fetch the activity
1530 * @return string fetched message URL. An empty string indicates a temporary error, null indicates a permament error,
1531 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1532 * @throws \ImagickException
1534 public static function fetchMissingActivity(string $url, array $child = [], string $relay_actor = '', int $completion = Receiver::COMPLETION_MANUAL, int $uid = 0): ?string
1536 if (Network::isUrlBlocked($url)) {
1541 $curlResult = HTTPSignature::fetchRaw($url, $uid);
1542 } catch (\Exception $exception) {
1543 Logger::notice('Error fetching url', ['url' => $url, 'exception' => $exception]);
1547 if (empty($curlResult)) {
1551 $body = $curlResult->getBody();
1552 if (!$curlResult->isSuccess() || empty($body)) {
1553 if (in_array($curlResult->getReturnCode(), [403, 404, 406, 410])) {
1559 $object = json_decode($body, true);
1560 if (empty($object) || !is_array($object)) {
1561 $element = explode(';', $curlResult->getContentType());
1562 if (!in_array($element[0], ['application/activity+json', 'application/ld+json', 'application/json'])) {
1563 Logger::debug('Unexpected content-type', ['url' => $url, 'content-type' => $curlResult->getContentType()]);
1566 Logger::notice('Invalid JSON data', ['url' => $url, 'content-type' => $curlResult->getContentType(), 'body' => $body]);
1570 $ldobject = JsonLD::compact($object);
1574 $attributed_to = JsonLD::fetchElement($ldobject, 'as:attributedTo', '@id');
1575 if (!empty($attributed_to)) {
1576 $signer[] = $attributed_to;
1579 $object_actor = JsonLD::fetchElement($ldobject, 'as:actor', '@id');
1580 if (!empty($attributed_to)) {
1581 $object_actor = $attributed_to;
1587 $signer[] = $object_actor;
1589 if (!empty($child['author'])) {
1590 $actor = $child['author'];
1593 $actor = $object_actor;
1596 $type = JsonLD::fetchElement($ldobject, '@type');
1597 $object_id = JsonLD::fetchElement($ldobject, 'as:object', '@id');
1599 if (!in_array($type, Receiver::CONTENT_TYPES) && !empty($object_id)) {
1600 if (($type == 'as:Announce') && !empty($relay_actor) && ($completion = Receiver::COMPLETION_RELAY)) {
1601 if (Item::searchByLink($object_id)) {
1604 Logger::debug('Fetch announced activity', ['type' => $type, 'id' => $object_id, 'actor' => $relay_actor, 'signer' => $signer]);
1606 return self::fetchMissingActivity($object_id, $child, $relay_actor, $completion, $uid);
1608 $activity = $object;
1609 $ldactivity = $ldobject;
1610 } elseif (!empty($object['id'])) {
1611 $activity = self::getActivityForObject($object, $actor);
1612 $ldactivity = JsonLD::compact($activity);
1617 $ldactivity['recursion-depth'] = !empty($child['recursion-depth']) ? $child['recursion-depth'] + 1 : 0;
1619 if ($object_actor != $actor) {
1620 Contact::updateByUrlIfNeeded($object_actor);
1623 Contact::updateByUrlIfNeeded($actor);
1625 if (!empty($child['thread-completion'])) {
1626 $ldactivity['thread-completion'] = $child['thread-completion'];
1627 $ldactivity['completion-mode'] = $child['completion-mode'] ?? Receiver::COMPLETION_NONE;
1629 $ldactivity['thread-completion'] = Contact::getIdForURL($relay_actor ?: $actor);
1630 $ldactivity['completion-mode'] = $completion;
1633 if ($completion == Receiver::COMPLETION_RELAY) {
1634 $ldactivity['from-relay'] = $ldactivity['thread-completion'];
1635 if (in_array($type, Receiver::CONTENT_TYPES) && !self::acceptIncomingMessage($ldactivity)) {
1640 if (!empty($child['thread-children-type'])) {
1641 $ldactivity['thread-children-type'] = $child['thread-children-type'];
1642 } elseif (!empty($child['type'])) {
1643 $ldactivity['thread-children-type'] = $child['type'];
1645 $ldactivity['thread-children-type'] = 'as:Create';
1648 if (($completion == Receiver::COMPLETION_RELAY) && Queue::exists($url, 'as:Create')) {
1649 Logger::info('Activity has already been queued.', ['url' => $url, 'object' => $activity['id']]);
1650 } elseif (ActivityPub\Receiver::processActivity($ldactivity, json_encode($activity), $uid, true, false, $signer, '', $completion)) {
1651 Logger::info('Activity had been fetched and processed.', ['url' => $url, 'entry' => $child['entry-id'] ?? 0, 'completion' => $completion, 'object' => $activity['id']]);
1653 Logger::info('Activity had been fetched and will be processed later.', ['url' => $url, 'entry' => $child['entry-id'] ?? 0, 'completion' => $completion, 'object' => $activity['id']]);
1656 return $activity['id'];
1659 private static function getActivityForObject(array $object, string $actor): array
1661 if (!empty($object['published'])) {
1662 $published = $object['published'];
1663 } elseif (!empty($child['published'])) {
1664 $published = $child['published'];
1666 $published = DateTimeFormat::utcNow();
1670 $activity['@context'] = $object['@context'] ?? ActivityPub::CONTEXT;
1671 unset($object['@context']);
1672 $activity['id'] = $object['id'];
1673 $activity['to'] = $object['to'] ?? [];
1674 $activity['cc'] = $object['cc'] ?? [];
1675 $activity['audience'] = $object['audience'] ?? [];
1676 $activity['actor'] = $actor;
1677 $activity['object'] = $object;
1678 $activity['published'] = $published;
1679 $activity['type'] = 'Create';
1685 * Test if incoming relay messages should be accepted
1687 * @param array $activity activity array
1688 * @return boolean true if message is accepted
1690 private static function acceptIncomingMessage(array $activity): bool
1692 if (empty($activity['as:object'])) {
1693 $id = JsonLD::fetchElement($activity, '@id');
1694 Logger::info('No object field in activity - accepted', ['id' => $id]);
1698 $id = JsonLD::fetchElement($activity, 'as:object', '@id');
1700 $replyto = JsonLD::fetchElement($activity['as:object'], 'as:inReplyTo', '@id');
1701 $uriid = ItemURI::getIdByURI($replyto ?? '');
1702 if (Post::exists(['uri-id' => $uriid])) {
1703 Logger::info('Post is a reply to an existing post - accepted', ['id' => $id, 'uri-id' => $uriid, 'replyto' => $replyto]);
1707 $attributed_to = JsonLD::fetchElement($activity['as:object'], 'as:attributedTo', '@id');
1708 $authorid = Contact::getIdForURL($attributed_to);
1710 $content = JsonLD::fetchElement($activity['as:object'], 'as:name', '@value') ?? '';
1711 $content .= ' ' . JsonLD::fetchElement($activity['as:object'], 'as:summary', '@value') ?? '';
1712 $content .= ' ' . HTML::toBBCode(JsonLD::fetchElement($activity['as:object'], 'as:content', '@value') ?? '');
1714 $attachments = JsonLD::fetchElementArray($activity['as:object'], 'as:attachment') ?? [];
1715 foreach ($attachments as $media) {
1716 if (!empty($media['as:summary'])) {
1717 $content .= ' ' . JsonLD::fetchElement($media, 'as:summary', '@value');
1719 if (!empty($media['as:name'])) {
1720 $content .= ' ' . JsonLD::fetchElement($media, 'as:name', '@value');
1725 $tags = Receiver::processTags(JsonLD::fetchElementArray($activity['as:object'], 'as:tag') ?? []);
1726 if (!empty($tags)) {
1727 foreach ($tags as $tag) {
1728 if (($tag['type'] != 'Hashtag') && !strpos($tag['type'], ':Hashtag') || empty($tag['name'])) {
1731 $messageTags[] = ltrim(mb_strtolower($tag['name']), '#');
1735 $languages = self::getPostLanguages($activity['as:object'] ?? '');
1737 $wanted = Relay::isSolicitedPost($messageTags, $content, $authorid, $id, Protocol::ACTIVITYPUB, $activity['from-relay'], $languages);
1743 foreach (['as:to', 'as:cc', 'as:bto', 'as:bcc', 'as:audience'] as $element) {
1744 $receiver_list = JsonLD::fetchElementArray($activity, $element, '@id');
1745 if (empty($receiver_list)) {
1748 $receivers = array_merge($receivers, $receiver_list);
1751 $searchtext = Engagement::getSearchTextForActivity($content, $authorid, $messageTags, $receivers);
1752 $languages = Item::getLanguageArray($content, 1, 0, $authorid);
1753 $language = !empty($languages) ? array_key_first($languages) : '';
1754 return DI::userDefinedChannel()->match($searchtext, $language);
1758 * Fetch the post language from the content
1760 * @param array $activity
1763 public static function getPostLanguages(array $activity): array
1765 $content = JsonLD::fetchElement($activity, 'as:content') ?? '';
1766 $languages = JsonLD::fetchElementArray($activity, 'as:content', '@language') ?? [];
1767 if (empty($languages)) {
1771 $iso639 = new \Matriphe\ISO639\ISO639;
1774 foreach ($languages as $language) {
1775 if ($language == $content) {
1778 $language = DI::l10n()->toISO6391($language);
1779 if (!in_array($language, array_column($iso639->allLanguages(), 0))) {
1782 $result[] = $language;
1788 * perform a "follow" request
1790 * @param array $activity
1792 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1793 * @throws \ImagickException
1795 public static function followUser(array $activity)
1797 $uid = User::getIdForURL($activity['object_id']);
1799 Queue::remove($activity);
1803 $owner = User::getOwnerDataById($uid);
1804 if (empty($owner)) {
1808 $cid = Contact::getIdForURL($activity['actor'], $uid);
1810 self::switchContact($cid);
1811 Contact::update(['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
1815 'author-id' => Contact::getIdForURL($activity['actor']),
1816 'author-link' => $activity['actor'],
1819 // Ensure that the contact has got the right network type
1820 self::switchContact($item['author-id']);
1822 $result = Contact::addRelationship($owner, [], $item, false, $activity['content'] ?? '');
1823 if ($result === true) {
1824 ActivityPub\Transmitter::sendContactAccept($item['author-link'], $activity['id'], $owner['uid']);
1827 $cid = Contact::getIdForURL($activity['actor'], $uid);
1832 if ($result && DI::config()->get('system', 'transmit_pending_events') && ($owner['contact-type'] == Contact::TYPE_COMMUNITY)) {
1833 self::transmitPendingEvents($cid, $owner['uid']);
1836 if (empty($contact)) {
1837 Contact::update(['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
1839 Logger::notice('Follow user ' . $uid . ' from contact ' . $cid . ' with id ' . $activity['id']);
1840 Queue::remove($activity);
1844 * Transmit pending events to the new follower
1846 * @param integer $cid Contact id
1847 * @param integer $uid User id
1850 private static function transmitPendingEvents(int $cid, int $uid)
1852 $account = DBA::selectFirst('account-user-view', ['ap-inbox', 'ap-sharedinbox'], ['id' => $cid]);
1853 $inbox = $account['ap-sharedinbox'] ?: $account['ap-inbox'];
1855 $events = DBA::select('event', ['id'], ["`uid` = ? AND `start` > ? AND `type` != ?", $uid, DateTimeFormat::utcNow(), 'birthday']);
1856 while ($event = DBA::fetch($events)) {
1857 $post = Post::selectFirst(['id', 'uri-id', 'created'], ['event-id' => $event['id']]);
1861 if (DI::config()->get('system', 'bulk_delivery')) {
1862 Post\Delivery::add($post['uri-id'], $uid, $inbox, $post['created'], Delivery::POST, [$cid]);
1863 Worker::add(Worker::PRIORITY_HIGH, 'APDelivery', '', 0, $inbox, 0);
1865 Worker::add(Worker::PRIORITY_HIGH, 'APDelivery', Delivery::POST, $post['id'], $inbox, $uid, [$cid], $post['uri-id']);
1871 * Update the given profile
1873 * @param array $activity
1874 * @throws \Exception
1876 public static function updatePerson(array $activity)
1878 if (empty($activity['object_id'])) {
1882 Logger::info('Updating profile', ['object' => $activity['object_id']]);
1883 Contact::updateFromProbeByURL($activity['object_id']);
1884 Queue::remove($activity);
1888 * Delete the given profile
1890 * @param array $activity
1892 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1894 public static function deletePerson(array $activity)
1896 if (empty($activity['object_id']) || empty($activity['actor'])) {
1897 Logger::info('Empty object id or actor.');
1898 Queue::remove($activity);
1902 if ($activity['object_id'] != $activity['actor']) {
1903 Logger::info('Object id does not match actor.');
1904 Queue::remove($activity);
1908 $contacts = DBA::select('contact', ['id'], ['nurl' => Strings::normaliseLink($activity['object_id'])]);
1909 while ($contact = DBA::fetch($contacts)) {
1910 Contact::remove($contact['id']);
1912 DBA::close($contacts);
1914 Logger::info('Deleted contact', ['object' => $activity['object_id']]);
1915 Queue::remove($activity);
1919 * Add moved contacts as followers for all subscribers of the old contact
1921 * @param array $activity
1923 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1925 public static function movePerson(array $activity)
1927 if (empty($activity['target_id']) || empty($activity['object_id'])) {
1928 Queue::remove($activity);
1932 if ($activity['object_id'] != $activity['actor']) {
1933 Logger::notice('Object is not the actor', ['activity' => $activity]);
1934 Queue::remove($activity);
1938 $from = Contact::getByURL($activity['object_id'], false, ['uri-id']);
1939 if (empty($from['uri-id'])) {
1940 Logger::info('Object not found', ['activity' => $activity]);
1941 Queue::remove($activity);
1945 $contacts = DBA::select('contact', ['uid', 'url'], ["`uri-id` = ? AND `uid` != ? AND `rel` IN (?, ?)", $from['uri-id'], 0, Contact::FRIEND, Contact::SHARING]);
1946 while ($from_contact = DBA::fetch($contacts)) {
1947 $result = Contact::createFromProbeForUser($from_contact['uid'], $activity['target_id']);
1948 Logger::debug('Follower added', ['from' => $from_contact, 'result' => $result]);
1950 DBA::close($contacts);
1951 Queue::remove($activity);
1955 * Blocks the user by the contact
1957 * @param array $activity
1959 * @throws \Exception
1961 public static function blockAccount(array $activity)
1963 $cid = Contact::getIdForURL($activity['actor']);
1968 $uid = User::getIdForURL($activity['object_id']);
1973 Contact\User::setIsBlocked($cid, $uid, true);
1975 Logger::info('Contact blocked user', ['contact' => $cid, 'user' => $uid]);
1976 Queue::remove($activity);
1980 * Unblocks the user by the contact
1982 * @param array $activity
1984 * @throws \Exception
1986 public static function unblockAccount(array $activity)
1988 $cid = Contact::getIdForURL($activity['actor']);
1993 $uid = User::getIdForURL($activity['object_object']);
1998 Contact\User::setIsBlocked($cid, $uid, false);
2000 Logger::info('Contact unblocked user', ['contact' => $cid, 'user' => $uid]);
2001 Queue::remove($activity);
2007 * @param array $activity
2009 * @throws \Exception
2011 public static function ReportAccount(array $activity)
2013 $account = Contact::getByURL($activity['object_id'], null, ['id', 'gsid']);
2014 if (empty($account)) {
2015 Logger::info('Unknown account', ['activity' => $activity]);
2016 Queue::remove($activity);
2020 $reporter_id = Contact::getIdForURL($activity['actor']);
2021 if (empty($reporter_id)) {
2022 Logger::info('Unknown actor', ['activity' => $activity]);
2023 Queue::remove($activity);
2028 foreach ($activity['object_ids'] as $status_id) {
2029 $post = Post::selectFirst(['uri-id'], ['uri' => $status_id]);
2030 if (!empty($post['uri-id'])) {
2031 $uri_ids[] = $post['uri-id'];
2035 $report = DI::reportFactory()->createFromReportsRequest(System::getRules(true), $reporter_id, $account['id'], $account['gsid'], $activity['content'], 'other', false, $uri_ids);
2036 DI::report()->save($report);
2038 Logger::info('Stored report', ['reporter' => $reporter_id, 'account' => $account, 'comment' => $activity['content'], 'object_ids' => $activity['object_ids']]);
2042 * Accept a follow request
2044 * @param array $activity
2045 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2046 * @throws \ImagickException
2048 public static function acceptFollowUser(array $activity)
2050 if (!empty($activity['object_actor'])) {
2051 $uid = User::getIdForURL($activity['object_actor']);
2053 } elseif (!empty($activity['receiver']) && (count($activity['receiver']) == 1)) {
2054 $uid = array_shift($activity['receiver']);
2059 Logger::notice('User could not be detected', ['activity' => $activity]);
2060 Queue::remove($activity);
2064 $cid = Contact::getIdForURL($activity['actor'], $uid);
2066 Logger::notice('No contact found', ['actor' => $activity['actor']]);
2067 Queue::remove($activity);
2071 $id = Transmitter::activityIDFromContact($cid);
2072 if ($id == $activity['object_id']) {
2073 Logger::info('Successful id check', ['uid' => $uid, 'cid' => $cid]);
2075 Logger::info('Unsuccessful id check', ['uid' => $uid, 'cid' => $cid, 'id' => $id, 'object_id' => $activity['object_id']]);
2077 Queue::remove($activity);
2082 self::switchContact($cid);
2084 $fields = ['pending' => false];
2086 $contact = DBA::selectFirst('contact', ['rel'], ['id' => $cid]);
2087 if ($contact['rel'] == Contact::FOLLOWER) {
2088 $fields['rel'] = Contact::FRIEND;
2091 $condition = ['id' => $cid];
2092 Contact::update($fields, $condition);
2093 Logger::info('Accept contact request', ['contact' => $cid, 'user' => $uid]);
2094 Queue::remove($activity);
2098 * Reject a follow request
2100 * @param array $activity
2101 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2102 * @throws \ImagickException
2104 public static function rejectFollowUser(array $activity)
2106 $uid = User::getIdForURL($activity['object_actor']);
2111 $cid = Contact::getIdForURL($activity['actor'], $uid);
2113 Logger::info('No contact found', ['actor' => $activity['actor']]);
2117 self::switchContact($cid);
2119 $contact = Contact::getById($cid, ['rel']);
2120 if ($contact['rel'] == Contact::SHARING) {
2121 Contact::remove($cid);
2122 Logger::info('Rejected contact request - contact removed', ['contact' => $cid, 'user' => $uid]);
2123 } elseif ($contact['rel'] == Contact::FRIEND) {
2124 Contact::update(['rel' => Contact::FOLLOWER], ['id' => $cid]);
2126 Logger::info('Rejected contact request', ['contact' => $cid, 'user' => $uid]);
2128 Queue::remove($activity);
2132 * Undo activity like "like" or "dislike"
2134 * @param array $activity
2135 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2136 * @throws \ImagickException
2138 public static function undoActivity(array $activity)
2140 if (empty($activity['object_id'])) {
2144 if (empty($activity['object_actor'])) {
2148 $author_id = Contact::getIdForURL($activity['object_actor']);
2149 if (empty($author_id)) {
2153 Item::markForDeletion(['uri' => $activity['object_id'], 'author-id' => $author_id, 'gravity' => Item::GRAVITY_ACTIVITY]);
2154 Queue::remove($activity);
2158 * Activity to remove a follower
2160 * @param array $activity
2161 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2162 * @throws \ImagickException
2164 public static function undoFollowUser(array $activity)
2166 $uid = User::getIdForURL($activity['object_object']);
2171 $owner = User::getOwnerDataById($uid);
2172 if (empty($owner)) {
2176 $cid = Contact::getIdForURL($activity['actor'], $uid);
2178 Logger::info('No contact found', ['actor' => $activity['actor']]);
2182 self::switchContact($cid);
2184 $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
2185 if (!DBA::isResult($contact)) {
2189 Contact::removeFollower($contact);
2190 Logger::info('Undo following request', ['contact' => $cid, 'user' => $uid]);
2191 Queue::remove($activity);
2195 * Switches a contact to AP if needed
2197 * @param integer $cid Contact ID
2199 * @throws \Exception
2201 private static function switchContact(int $cid)
2203 $contact = DBA::selectFirst('contact', ['network', 'url'], ['id' => $cid]);
2204 if (!DBA::isResult($contact) || in_array($contact['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN]) || Contact::isLocal($contact['url'])) {
2208 Logger::info('Change existing contact', ['cid' => $cid, 'previous' => $contact['network']]);
2209 Contact::updateFromProbe($cid);
2213 * Collects implicit mentions like:
2214 * - the author of the parent item
2215 * - all the mentioned conversants in the parent item
2217 * @param array $parent Item array with at least ['id', 'author-link', 'alias']
2219 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2221 private static function getImplicitMentionList(array $parent): array
2223 $parent_terms = Tag::getByURIId($parent['uri-id'], [Tag::MENTION, Tag::IMPLICIT_MENTION, Tag::EXCLUSIVE_MENTION]);
2225 $parent_author = Contact::getByURL($parent['author-link'], false, ['url', 'nurl', 'alias']);
2227 $implicit_mentions = [];
2228 if (empty($parent_author['url'])) {
2229 Logger::notice('Author public contact unknown.', ['author-link' => $parent['author-link'], 'parent-id' => $parent['id']]);
2231 $implicit_mentions[] = $parent_author['url'];
2232 $implicit_mentions[] = $parent_author['nurl'];
2233 $implicit_mentions[] = $parent_author['alias'];
2236 if (!empty($parent['alias'])) {
2237 $implicit_mentions[] = $parent['alias'];
2240 foreach ($parent_terms as $term) {
2241 $contact = Contact::getByURL($term['url'], false, ['url', 'nurl', 'alias']);
2242 if (!empty($contact['url'])) {
2243 $implicit_mentions[] = $contact['url'];
2244 $implicit_mentions[] = $contact['nurl'];
2245 $implicit_mentions[] = $contact['alias'];
2249 return $implicit_mentions;
2253 * Strips from the body prepended implicit mentions
2255 * @param string $body
2256 * @param array $parent
2259 private static function removeImplicitMentionsFromBody(string $body, array $parent): string
2261 if (DI::config()->get('system', 'disable_implicit_mentions')) {
2265 $potential_mentions = self::getImplicitMentionList($parent);
2267 $kept_mentions = [];
2269 // Extract one prepended mention at a time from the body
2270 while(preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $body, $matches)) {
2271 if (!in_array($matches[2], $potential_mentions)) {
2272 $kept_mentions[] = $matches[1];
2275 $body = $matches[3];
2278 // Re-appending the kept mentions to the body after extraction
2279 $kept_mentions[] = $body;
2281 return implode('', $kept_mentions);
2285 * Adds links to string mentions
2287 * @param string $body
2288 * @param array $tags
2291 protected static function addMentionLinks(string $body, array $tags): string
2293 // This prevents links to be added again to Pleroma-style mention links
2294 $body = self::normalizeMentionLinks($body);
2296 $body = BBCode::performWithEscapedTags($body, ['url'], function ($body) use ($tags) {
2297 foreach ($tags as $tag) {
2298 if (empty($tag['name']) || empty($tag['type']) || empty($tag['href']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
2302 $hash = substr($tag['name'], 0, 1);
2303 $name = substr($tag['name'], 1);
2304 if (!in_array($hash, Tag::TAG_CHARACTER)) {
2306 $name = $tag['name'];
2309 if (Network::isValidHttpUrl($tag['href'])) {
2310 $body = str_replace($tag['name'], $hash . '[url=' . $tag['href'] . ']' . $name . '[/url]', $body);