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\Protocol\Activity;
46 use Friendica\Protocol\ActivityPub;
47 use Friendica\Protocol\Delivery;
48 use Friendica\Protocol\Relay;
49 use Friendica\Util\DateTimeFormat;
50 use Friendica\Util\HTTPSignature;
51 use Friendica\Util\JsonLD;
52 use Friendica\Util\Network;
53 use Friendica\Util\Strings;
56 * ActivityPub Processor Protocol class
60 const CACHEKEY_FETCH_ACTIVITY = 'processor:fetchMissingActivity:';
61 const CACHEKEY_JUST_FETCHED = 'processor:isJustFetched:';
64 * Add an object id to the list of processed ids
70 private static function addActivityId(string $id)
72 DBA::delete('fetched-activity', ["`received` < ?", DateTimeFormat::utc('now - 5 minutes')]);
73 DBA::insert('fetched-activity', ['object-id' => $id, 'received' => DateTimeFormat::utcNow()]);
77 * Checks if the given object id has just been fetched
83 private static function isFetched(string $id): bool
85 return DBA::exists('fetched-activity', ['object-id' => $id]);
89 * Extracts the tag character (#, @, !) from mention links
94 public static function normalizeMentionLinks(string $body): string
96 $body = preg_replace('%\[url=([^\[\]]*)]([#@!])(.*?)\[/url]%ism', '$2[url=$1]$3[/url]', $body);
97 $body = preg_replace('%([#@!])\[zrl=([^\[\]]*)](.*?)\[/zrl]%ism', '$1[url=$2]$3[/url]', $body);
102 * Convert the language array into a language JSON
104 * @param array $languages
105 * @return string language JSON
107 private static function processLanguages(array $languages): string
109 $codes = array_keys($languages);
111 foreach ($codes as $code) {
119 return json_encode($lang);
122 * Replaces emojis in the body
125 * @param string $body
126 * @param array $emojis
128 * @return string with replaced emojis
130 private static function replaceEmojis(int $uri_id, string $body, array $emojis): string
134 array_column($emojis, 'name'),
135 array_map(function ($emoji) {
136 return '[emoji=' . $emoji['href'] . ']' . $emoji['name'] . '[/emoji]';
141 // We store the emoji here to be able to avoid storing it in the media
142 foreach ($emojis as $emoji) {
143 Post\Link::getByLink($uri_id, $emoji['href']);
149 * Store attached media files in the post-media table
152 * @param array $attachment
155 private static function storeAttachmentAsMedia(int $uriid, array $attachment)
157 if (empty($attachment['url'])) {
161 $data = ['uri-id' => $uriid];
162 $data['type'] = Post\Media::UNKNOWN;
163 $data['url'] = $attachment['url'];
164 $data['mimetype'] = $attachment['mediaType'] ?? null;
165 $data['height'] = $attachment['height'] ?? null;
166 $data['width'] = $attachment['width'] ?? null;
167 $data['size'] = $attachment['size'] ?? null;
168 $data['preview'] = $attachment['image'] ?? null;
169 $data['description'] = $attachment['name'] ?? null;
171 Post\Media::insert($data);
175 * Store attachment data
177 * @param array $activity
180 private static function storeAttachments(array $activity, array $item)
182 if (empty($activity['attachments'])) {
186 foreach ($activity['attachments'] as $attach) {
187 self::storeAttachmentAsMedia($item['uri-id'], $attach);
192 * Store question data
194 * @param array $activity
197 private static function storeQuestion(array $activity, array $item)
199 if (empty($activity['question'])) {
202 $question = ['multiple' => $activity['question']['multiple']];
204 if (!empty($activity['question']['voters'])) {
205 $question['voters'] = $activity['question']['voters'];
208 if (!empty($activity['question']['end-time'])) {
209 $question['end-time'] = DateTimeFormat::utc($activity['question']['end-time']);
212 Post\Question::update($item['uri-id'], $question);
214 foreach ($activity['question']['options'] as $key => $option) {
215 $option = ['name' => $option['name'], 'replies' => $option['replies']];
216 Post\QuestionOption::update($item['uri-id'], $key, $option);
219 Logger::debug('Storing incoming question', ['type' => $activity['type'], 'uri-id' => $item['uri-id'], 'question' => $activity['question']]);
225 * @param array $activity Activity array
226 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
227 * @throws \ImagickException
229 public static function updateItem(array $activity)
231 $item = Post::selectFirst(['uri', 'uri-id', 'thr-parent', 'gravity', 'post-type', 'private'], ['uri' => $activity['id']]);
232 if (!DBA::isResult($item)) {
233 Logger::notice('No existing item, item will be created', ['uri' => $activity['id']]);
234 $item = self::createItem($activity, false);
236 Queue::remove($activity);
240 self::postItem($activity, $item);
244 $item['changed'] = DateTimeFormat::utcNow();
245 $item['edited'] = DateTimeFormat::utc($activity['updated']);
247 Post\Media::deleteByURIId($item['uri-id'], [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE, Post\Media::HTML]);
248 $item = self::processContent($activity, $item);
250 Queue::remove($activity);
254 self::storeAttachments($activity, $item);
255 self::storeQuestion($activity, $item);
257 Post\History::add($item['uri-id'], $item);
258 Item::update($item, ['uri' => $activity['id']]);
260 Queue::remove($activity);
262 if ($activity['object_type'] == 'as:Event') {
263 $posts = Post::select(['event-id', 'uid'], ["`uri` = ? AND `event-id` > ?", $activity['id'], 0]);
264 while ($post = DBA::fetch($posts)) {
265 self::updateEvent($post['event-id'], $activity);
271 * Update an existing event
273 * @param int $event_id
274 * @param array $activity
276 private static function updateEvent(int $event_id, array $activity)
278 $event = DBA::selectFirst('event', [], ['id' => $event_id]);
280 $event['edited'] = DateTimeFormat::utc($activity['updated']);
281 $event['summary'] = HTML::toBBCode($activity['name']);
282 $event['desc'] = HTML::toBBCode($activity['content']);
283 if (!empty($activity['start-time'])) {
284 $event['start'] = DateTimeFormat::utc($activity['start-time']);
286 if (!empty($activity['end-time'])) {
287 $event['finish'] = DateTimeFormat::utc($activity['end-time']);
289 $event['nofinish'] = empty($event['finish']);
290 $event['location'] = $activity['location'];
292 Logger::info('Updating event', ['uri' => $activity['id'], 'id' => $event_id]);
293 Event::store($event);
297 * Prepares data for a message
299 * @param array $activity Activity array
300 * @param bool $fetch_parents
302 * @return array Internal item
304 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
305 * @throws \ImagickException
307 public static function createItem(array $activity, bool $fetch_parents): array
310 $item['verb'] = Activity::POST;
311 $item['thr-parent'] = $activity['reply-to-id'];
313 if ($activity['reply-to-id'] == $activity['id']) {
314 $item['gravity'] = Item::GRAVITY_PARENT;
315 $item['object-type'] = Activity\ObjectType::NOTE;
317 $item['gravity'] = Item::GRAVITY_COMMENT;
318 $item['object-type'] = Activity\ObjectType::COMMENT;
321 if (!empty($activity['conversation'])) {
322 $item['conversation'] = $activity['conversation'];
323 } elseif (!empty($activity['context'])) {
324 $item['conversation'] = $activity['context'];
327 if (!empty($item['conversation'])) {
328 $conversation = Post::selectFirstThread(['uri'], ['conversation' => $item['conversation']]);
329 if (!empty($conversation)) {
330 Logger::debug('Got conversation', ['conversation' => $item['conversation'], 'parent' => $conversation]);
331 $item['parent-uri'] = $conversation['uri'];
332 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
338 Logger::debug('Create Item', ['id' => $activity['id'], 'conversation' => $item['conversation'] ?? '']);
339 if (empty($activity['author']) && empty($activity['actor'])) {
340 Logger::notice('Missing author and actor. We quit here.', ['activity' => $activity]);
341 Queue::remove($activity);
345 if (!in_array(0, $activity['receiver']) || !DI::config()->get('system', 'fetch_parents')) {
346 $fetch_parents = false;
349 if ($fetch_parents && empty($activity['directmessage']) && ($activity['id'] != $activity['reply-to-id']) && !Post::exists(['uri' => $activity['reply-to-id']])) {
350 $result = self::fetchParent($activity, !empty($conversation));
351 if (!empty($result)) {
352 if (($item['thr-parent'] != $result) && Post::exists(['uri' => $result])) {
353 $item['thr-parent'] = $result;
355 } elseif (empty($conversation)) {
360 $item['diaspora_signed_text'] = $activity['diaspora:comment'] ?? '';
362 if (empty($conversation) && empty($activity['directmessage']) && ($item['gravity'] != Item::GRAVITY_PARENT) && !Post::exists(['uri' => $item['thr-parent']])) {
363 Logger::notice('Parent not found, message will be discarded.', ['thr-parent' => $item['thr-parent']]);
364 if (!$fetch_parents) {
365 Queue::remove($activity);
370 $item['network'] = Protocol::ACTIVITYPUB;
371 $item['author-link'] = $activity['author'];
372 $item['author-id'] = Contact::getIdForURL($activity['author']);
373 $item['owner-link'] = $activity['actor'];
374 $item['owner-id'] = Contact::getIdForURL($activity['actor']);
376 if (in_array(0, $activity['receiver']) && !empty($activity['unlisted'])) {
377 $item['private'] = Item::UNLISTED;
378 } elseif (in_array(0, $activity['receiver'])) {
379 $item['private'] = Item::PUBLIC;
381 $item['private'] = Item::PRIVATE;
384 if (!empty($activity['raw'])) {
385 $item['source'] = $activity['raw'];
388 $item['protocol'] = Conversation::PARCEL_ACTIVITYPUB;
390 if (isset($activity['push'])) {
391 $item['direction'] = $activity['push'] ? Conversation::PUSH : Conversation::PULL;
394 if (!empty($activity['from-relay'])) {
395 $item['direction'] = Conversation::RELAY;
398 if ($activity['object_type'] == 'as:Article') {
399 $item['post-type'] = Item::PT_ARTICLE;
400 } elseif ($activity['object_type'] == 'as:Audio') {
401 $item['post-type'] = Item::PT_AUDIO;
402 } elseif ($activity['object_type'] == 'as:Document') {
403 $item['post-type'] = Item::PT_DOCUMENT;
404 } elseif ($activity['object_type'] == 'as:Event') {
405 $item['post-type'] = Item::PT_EVENT;
406 } elseif ($activity['object_type'] == 'as:Image') {
407 $item['post-type'] = Item::PT_IMAGE;
408 } elseif ($activity['object_type'] == 'as:Page') {
409 $item['post-type'] = Item::PT_PAGE;
410 } elseif ($activity['object_type'] == 'as:Question') {
411 $item['post-type'] = Item::PT_POLL;
412 } elseif ($activity['object_type'] == 'as:Video') {
413 $item['post-type'] = Item::PT_VIDEO;
415 $item['post-type'] = Item::PT_NOTE;
418 $item['isGroup'] = false;
420 if (!empty($activity['thread-completion'])) {
421 if ($activity['thread-completion'] != $item['owner-id']) {
422 $actor = Contact::getById($activity['thread-completion'], ['url']);
423 $item['causer-link'] = $actor['url'];
424 $item['causer-id'] = $activity['thread-completion'];
425 Logger::info('Use inherited actor as causer.', ['id' => $item['owner-id'], 'activity' => $activity['thread-completion'], 'owner' => $item['owner-link'], 'actor' => $actor['url']]);
427 // Store the original actor in the "causer" fields to enable the check for ignored or blocked contacts
428 $item['causer-link'] = $item['owner-link'];
429 $item['causer-id'] = $item['owner-id'];
430 Logger::info('Use actor as causer.', ['id' => $item['owner-id'], 'actor' => $item['owner-link']]);
433 $item['owner-link'] = $item['author-link'];
434 $item['owner-id'] = $item['author-id'];
437 if (!$item['isGroup'] && !empty($activity['receiver_urls']['as:audience'])) {
438 foreach ($activity['receiver_urls']['as:audience'] as $audience) {
439 $actor = APContact::getByURL($audience, false);
440 if (($actor['type'] ?? 'Person') == 'Group') {
441 Logger::debug('Group post detected via audience.', ['audience' => $audience, 'actor' => $activity['actor'], 'author' => $activity['author']]);
442 $item['isGroup'] = true;
443 $item['group-link'] = $audience;
447 $owner = APContact::getByURL($item['owner-link'], false);
450 if (!$item['isGroup'] && (($owner['type'] ?? 'Person') == 'Group')) {
451 Logger::debug('Group post detected via owner.', ['actor' => $activity['actor'], 'author' => $activity['author']]);
452 $item['isGroup'] = true;
453 $item['group-link'] = $item['owner-link'];
454 } elseif (!empty($item['causer-link'])) {
455 $causer = APContact::getByURL($item['causer-link'], false);
458 if (!$item['isGroup'] && (($causer['type'] ?? 'Person') == 'Group')) {
459 Logger::debug('Group post detected via causer.', ['actor' => $activity['actor'], 'author' => $activity['author'], 'causer' => $item['causer-link']]);
460 $item['isGroup'] = true;
461 $item['group-link'] = $item['causer-link'];
464 if (!empty($item['group-link']) && empty($item['causer-link'])) {
465 $item['causer-link'] = $item['group-link'];
466 $item['causer-id'] = Contact::getIdForURL($item['causer-link']);
469 $item['uri'] = $activity['id'];
471 if (empty($activity['published']) || empty($activity['updated'])) {
472 DI::logger()->notice('published or updated keys are empty for activity', ['activity' => $activity, 'callstack' => System::callstack(10)]);
475 $item['created'] = DateTimeFormat::utc($activity['published'] ?? 'now');
476 $item['edited'] = DateTimeFormat::utc($activity['updated'] ?? 'now');
477 $guid = $activity['sc:identifier'] ?: self::getGUIDByURL($item['uri']);
478 $item['guid'] = $activity['diaspora:guid'] ?: $guid;
480 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
481 if (empty($item['uri-id'])) {
482 Logger::warning('Unable to get a uri-id for an item uri', ['uri' => $item['uri'], 'guid' => $item['guid']]);
486 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
488 $item = self::processContent($activity, $item);
490 Logger::info('Message was not processed');
491 Queue::remove($activity);
495 $item['plink'] = $activity['alternate-url'] ?? $item['uri'];
497 self::storeAttachments($activity, $item);
498 self::storeQuestion($activity, $item);
500 // We received the post via AP, so we set the protocol of the server to AP
501 $contact = Contact::getById($item['author-id'], ['gsid']);
502 if (!empty($contact['gsid'])) {
503 GServer::setProtocol($contact['gsid'], Post\DeliveryData::ACTIVITYPUB);
506 if ($item['author-id'] != $item['owner-id']) {
507 $contact = Contact::getById($item['owner-id'], ['gsid']);
508 if (!empty($contact['gsid'])) {
509 GServer::setProtocol($contact['gsid'], Post\DeliveryData::ACTIVITYPUB);
517 * Fetch and process parent posts for the given activity
519 * @param array $activity
520 * @param bool $in_background
524 private static function fetchParent(array $activity, bool $in_background = false): string
526 if (self::isFetched($activity['reply-to-id'])) {
527 Logger::info('Id is already fetched', ['id' => $activity['reply-to-id']]);
531 self::addActivityId($activity['reply-to-id']);
533 if (!DI::config()->get('system', 'fetch_by_worker')) {
534 $in_background = false;
537 $recursion_depth = $activity['recursion-depth'] ?? 0;
539 if (!$in_background && ($recursion_depth < DI::config()->get('system', 'max_recursion_depth'))) {
540 Logger::info('Parent not found. Try to refetch it.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
541 $result = self::fetchMissingActivity($activity['reply-to-id'], $activity, '', Receiver::COMPLETION_AUTO);
542 if (empty($result) && self::isActivityGone($activity['reply-to-id'])) {
543 Logger::notice('The activity is gone, the queue entry will be deleted', ['parent' => $activity['reply-to-id']]);
544 if (!empty($activity['entry-id'])) {
545 Queue::deleteById($activity['entry-id']);
548 } elseif (!empty($result)) {
549 $exists = Post::exists(['uri' => [$result, $activity['reply-to-id']]]);
551 Logger::info('The activity has been fetched and created.', ['parent' => $result]);
553 } elseif (DI::config()->get('system', 'fetch_by_worker') || DI::config()->get('system', 'decoupled_receiver')) {
554 Logger::info('The activity has been fetched and will hopefully be created later.', ['parent' => $result]);
556 Logger::notice('The activity exists but has not been created, the queue entry will be deleted.', ['parent' => $result]);
557 if (!empty($activity['entry-id'])) {
558 Queue::deleteById($activity['entry-id']);
563 if (empty($result) && !DI::config()->get('system', 'fetch_by_worker')) {
566 } elseif (self::isActivityGone($activity['reply-to-id'])) {
567 Logger::notice('The activity is gone. We will not spawn a worker. The queue entry will be deleted', ['parent' => $activity['reply-to-id']]);
568 if ($in_background) {
569 // fetching in background is done for all activities where we have got the conversation
570 // There we only delete the single activity and not the whole thread since we can store the
571 // other posts in the thread even with missing posts.
572 Queue::remove($activity);
573 } elseif (!empty($activity['entry-id'])) {
574 Queue::deleteById($activity['entry-id']);
577 } elseif ($in_background) {
578 Logger::notice('Fetching is done in the background.', ['parent' => $activity['reply-to-id']]);
580 Logger::notice('Recursion level is too high.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
583 if (!Fetch::hasWorker($activity['reply-to-id'])) {
584 Logger::notice('Fetching is done by worker.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
585 Fetch::add($activity['reply-to-id']);
586 $activity['recursion-depth'] = 0;
587 $wid = Worker::add(Worker::PRIORITY_HIGH, 'FetchMissingActivity', $activity['reply-to-id'], $activity, '', Receiver::COMPLETION_AUTO);
588 Fetch::setWorkerId($activity['reply-to-id'], $wid);
590 Logger::debug('Activity will already be fetched via a worker.', ['url' => $activity['reply-to-id']]);
597 * Check if a given activity is no longer available
603 public static function isActivityGone(string $url): bool
606 $curlResult = HTTPSignature::fetchRaw($url, 0);
607 } catch (\Exception $exception) {
608 Logger::notice('Error fetching url', ['url' => $url, 'exception' => $exception]);
612 if (Network::isUrlBlocked($url)) {
616 // @todo To ensure that the remote system is working correctly, we can check if the "Content-Type" contains JSON
617 if (in_array($curlResult->getReturnCode(), [401, 404])) {
621 if ($curlResult->isSuccess()) {
622 $object = json_decode($curlResult->getBody(), true);
623 if (!empty($object)) {
624 $activity = JsonLD::compact($object);
625 if (JsonLD::fetchElement($activity, '@type') == 'as:Tombstone') {
629 } elseif ($curlResult->getReturnCode() == 0) {
630 $host = parse_url($url, PHP_URL_HOST);
631 if (!(filter_var($host, FILTER_VALIDATE_IP) || @dns_get_record($host . '.', DNS_A + DNS_AAAA))) {
641 * @param array $activity
642 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
643 * @throws \ImagickException
645 public static function deleteItem(array $activity)
647 $owner = Contact::getIdForURL($activity['actor']);
649 Logger::info('Deleting item', ['object' => $activity['object_id'], 'owner' => $owner]);
650 Item::markForDeletion(['uri' => $activity['object_id'], 'owner-id' => $owner]);
651 Queue::remove($activity);
655 * Prepare the item array for an activity
657 * @param array $activity Activity array
658 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
659 * @throws \ImagickException
661 public static function addTag(array $activity)
663 if (empty($activity['object_content']) || empty($activity['object_id'])) {
667 foreach ($activity['receiver'] as $receiver) {
668 $item = Post::selectFirst(['id', 'uri-id', 'origin', 'author-link'], ['uri' => $activity['target_id'], 'uid' => $receiver]);
669 if (!DBA::isResult($item)) {
670 // We don't fetch missing content for this purpose
674 if (($item['author-link'] != $activity['actor']) && !$item['origin']) {
675 Logger::info('Not origin, not from the author, skipping update', ['id' => $item['id'], 'author' => $item['author-link'], 'actor' => $activity['actor']]);
679 Tag::store($item['uri-id'], Tag::HASHTAG, $activity['object_content'], $activity['object_id']);
680 Logger::info('Tagged item', ['id' => $item['id'], 'tag' => $activity['object_content'], 'uri' => $activity['target_id'], 'actor' => $activity['actor']]);
685 * Prepare the item array for an activity
687 * @param array $activity Activity array
688 * @param string $verb Activity verb
689 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
690 * @throws \ImagickException
692 public static function createActivity(array $activity, string $verb)
694 $activity['reply-to-id'] = $activity['object_id'];
695 $item = self::createItem($activity, false);
697 Logger::debug('Activity was not prepared', ['id' => $activity['object_id']]);
701 $item['verb'] = $verb;
702 $item['thr-parent'] = $activity['object_id'];
703 $item['gravity'] = Item::GRAVITY_ACTIVITY;
704 unset($item['post-type']);
705 $item['object-type'] = Activity\ObjectType::NOTE;
707 if (!empty($activity['content'])) {
708 $item['body'] = HTML::toBBCode($activity['content']);
711 $item['diaspora_signed_text'] = $activity['diaspora:like'] ?? '';
713 self::postItem($activity, $item);
717 * Fetch the Uri-Id of a post for the "featured" collection
719 * @param array $activity
722 private static function getUriIdForFeaturedCollection(array $activity)
724 $actor = APContact::getByURL($activity['actor']);
729 // Refetch the account when the "featured" collection is missing.
730 // This can be removed in a future version (end of 2022 should be good).
731 if (empty($actor['featured'])) {
732 $actor = APContact::getByURL($activity['actor'], true);
738 $parent = Post::selectFirst(['uri-id', 'author-id'], ['uri' => $activity['object_id']]);
739 if (empty($parent['uri-id'])) {
740 if (self::fetchMissingActivity($activity['object_id'], $activity, '', Receiver::COMPLETION_AUTO)) {
741 $parent = Post::selectFirst(['uri-id'], ['uri' => $activity['object_id']]);
745 if (!empty($parent['uri-id'])) {
753 * Add a post to the "Featured" collection
755 * @param array $activity
757 public static function addToFeaturedCollection(array $activity)
759 $post = self::getUriIdForFeaturedCollection($activity);
764 Logger::debug('Add post to featured collection', ['post' => $post]);
766 Post\Collection::add($post['uri-id'], Post\Collection::FEATURED, $post['author-id']);
767 Queue::remove($activity);
771 * Remove a post to the "Featured" collection
773 * @param array $activity
775 public static function removeFromFeaturedCollection(array $activity)
777 $post = self::getUriIdForFeaturedCollection($activity);
782 Logger::debug('Remove post from featured collection', ['post' => $post]);
784 Post\Collection::remove($post['uri-id'], Post\Collection::FEATURED);
785 Queue::remove($activity);
791 * @param array $activity Activity array
794 * @return int event id
797 public static function createEvent(array $activity, array $item): int
799 $event['summary'] = HTML::toBBCode($activity['name'] ?: $activity['summary']);
800 $event['desc'] = HTML::toBBCode($activity['content'] ?? '');
801 if (!empty($activity['start-time'])) {
802 $event['start'] = DateTimeFormat::utc($activity['start-time']);
804 if (!empty($activity['end-time'])) {
805 $event['finish'] = DateTimeFormat::utc($activity['end-time']);
807 $event['nofinish'] = empty($event['finish']);
808 $event['location'] = $activity['location'];
809 $event['cid'] = $item['contact-id'];
810 $event['uid'] = $item['uid'];
811 $event['uri'] = $item['uri'];
812 $event['edited'] = $item['edited'];
813 $event['private'] = $item['private'];
814 $event['guid'] = $item['guid'];
815 $event['plink'] = $item['plink'];
816 $event['network'] = $item['network'];
817 $event['protocol'] = $item['protocol'];
818 $event['direction'] = $item['direction'];
819 $event['source'] = $item['source'];
821 $ev = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
822 if (DBA::isResult($ev)) {
823 $event['id'] = $ev['id'];
826 $event_id = Event::store($event);
828 Logger::info('Event was stored', ['id' => $event_id]);
834 * Process the content
836 * @param array $activity Activity array
838 * @return array|bool Returns the item array or false if there was an unexpected occurrence
841 private static function processContent(array $activity, array $item)
843 if (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/markdown')) {
844 $item['title'] = strip_tags($activity['name'] ?? '');
845 $content = Markdown::toBBCode($activity['content']);
846 } elseif (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/bbcode')) {
847 $item['title'] = $activity['name'];
848 $content = $activity['content'];
850 // By default assume "text/html"
851 $item['title'] = HTML::toBBCode($activity['name'] ?? '');
852 $content = HTML::toBBCode($activity['content'] ?? '');
855 $item['title'] = trim(BBCode::toPlaintext($item['title']));
857 if (!empty($activity['languages'])) {
858 $item['language'] = self::processLanguages($activity['languages']);
861 if (!empty($activity['emojis'])) {
862 $content = self::replaceEmojis($item['uri-id'], $content, $activity['emojis']);
865 $content = self::addMentionLinks($content, $activity['tags']);
867 if (!empty($activity['quote-url'])) {
868 $id = Item::fetchByLink($activity['quote-url']);
870 $shared_item = Post::selectFirst(['uri-id'], ['id' => $id]);
871 $item['quote-uri-id'] = $shared_item['uri-id'];
872 } elseif ($uri_id = ItemURI::getIdByURI($activity['quote-url'], false)) {
873 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]);
874 $item['quote-uri-id'] = $uri_id;
876 Logger::info('Quote was not fetched', ['guid' => $item['guid'], 'uri-id' => $item['uri-id'], 'quote' => $activity['quote-url']]);
880 if (!empty($activity['source'])) {
881 $item['body'] = $activity['source'];
882 $item['raw-body'] = $content;
884 $quote_uri_id = Item::getQuoteUriId($item['body']);
885 if (empty($item['quote-uri-id']) && !empty($quote_uri_id)) {
886 $item['quote-uri-id'] = $quote_uri_id;
889 $item['body'] = BBCode::removeSharedData($item['body']);
891 $parent_uri = $item['parent-uri'] ?? $item['thr-parent'];
892 if (empty($activity['directmessage']) && ($parent_uri != $item['uri']) && ($item['gravity'] == Item::GRAVITY_COMMENT)) {
893 $parent = Post::selectFirst(['id', 'uri-id', 'private', 'author-link', 'alias'], ['uri' => $parent_uri]);
894 if (!DBA::isResult($parent)) {
895 Logger::warning('Unknown parent item.', ['uri' => $parent_uri]);
898 $content = self::removeImplicitMentionsFromBody($content, $parent);
900 $item['content-warning'] = HTML::toBBCode($activity['summary'] ?? '');
901 $item['raw-body'] = $item['body'] = $content;
904 self::storeFromBody($item);
905 self::storeTags($item['uri-id'], $activity['tags']);
907 self::storeReceivers($item['uri-id'], $activity['receiver_urls'] ?? []);
909 $item['location'] = $activity['location'];
911 if (!empty($activity['latitude']) && !empty($activity['longitude'])) {
912 $item['coord'] = $activity['latitude'] . ' ' . $activity['longitude'];
915 $item['app'] = $activity['generator'];
921 * Store hashtags and mentions
925 private static function storeFromBody(array $item)
927 // Make sure to delete all existing tags (can happen when called via the update functionality)
928 DBA::delete('post-tag', ['uri-id' => $item['uri-id']]);
930 Tag::storeFromBody($item['uri-id'], $item['body'], '@!');
934 * Generate a GUID out of an URL of an ActivityPub post.
936 * @param string $url message URL
937 * @return string with GUID
939 private static function getGUIDByURL(string $url): string
941 $parsed = parse_url($url);
943 $host_hash = hash('crc32', $parsed['host']);
945 unset($parsed["scheme"]);
946 unset($parsed["host"]);
948 $path = implode("/", $parsed);
950 return $host_hash . '-'. hash('fnv164', $path) . '-'. hash('joaat', $path);
954 * Checks if an incoming message is wanted
956 * @param array $activity
958 * @return boolean Is the message wanted?
960 private static function isSolicitedMessage(array $activity, array $item): bool
962 // The checks are split to improve the support when searching why a message was accepted.
963 if (count($activity['receiver']) != 1) {
964 // The message has more than one receiver, so it is wanted.
965 Logger::debug('Message has got several receivers - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
969 if ($item['private'] == Item::PRIVATE) {
970 // We only look at public posts here. Private posts are expected to be intentionally posted to the single receiver.
971 Logger::debug('Message is private - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
975 if (!empty($activity['from-relay'])) {
976 // We check relay posts at another place. When it arrived here, the message is already checked.
977 Logger::debug('Message is a relay post that is already checked - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
981 if (in_array($activity['completion-mode'] ?? Receiver::COMPLETION_NONE, [Receiver::COMPLETION_MANUAL, Receiver::COMPLETION_ANNOUNCE])) {
982 // Manual completions and completions caused by reshares are allowed without any further checks.
983 Logger::debug('Message is in completion mode - accepted', ['mode' => $activity['completion-mode'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
987 if ($item['gravity'] != Item::GRAVITY_PARENT) {
988 // We cannot reliably check at this point if a comment or activity belongs to an accepted post or needs to be fetched
989 // This can possibly be improved in the future.
990 Logger::debug('Message is no parent - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
994 $tags = array_column(Tag::getByURIId($item['uri-id'], [Tag::HASHTAG]), 'name');
995 if (Relay::isSolicitedPost($tags, $item['body'], $item['author-id'], $item['uri'], Protocol::ACTIVITYPUB, $activity['thread-completion'] ?? 0)) {
996 Logger::debug('Post is accepted because of the relay settings', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
1004 * Creates an item post
1006 * @param array $activity Activity data
1007 * @param array $item item array
1008 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1009 * @throws \ImagickException
1011 public static function postItem(array $activity, array $item)
1019 ksort($activity['receiver']);
1021 if (!self::isSolicitedMessage($activity, $item)) {
1022 DBA::delete('item-uri', ['id' => $item['uri-id']]);
1023 if (!empty($activity['entry-id'])) {
1024 Queue::deleteById($activity['entry-id']);
1029 foreach ($activity['receiver'] as $receiver) {
1030 if ($receiver == -1) {
1034 if (($receiver != 0) && empty($item['parent-uri-id']) && !empty($item['thr-parent-id'])) {
1035 $parent = Post::selectFirst(['parent-uri-id', 'parent-uri'], ['uri-id' => $item['thr-parent-id'], 'uid' => [0, $receiver]]);
1036 if (!empty($parent['parent-uri-id'])) {
1037 $item['parent-uri-id'] = $parent['parent-uri-id'];
1038 $item['parent-uri'] = $parent['parent-uri'];
1042 $item['uid'] = $receiver;
1044 $type = $activity['reception_type'][$receiver] ?? Receiver::TARGET_UNKNOWN;
1046 case Receiver::TARGET_TO:
1047 $item['post-reason'] = Item::PR_TO;
1049 case Receiver::TARGET_CC:
1050 $item['post-reason'] = Item::PR_CC;
1052 case Receiver::TARGET_BTO:
1053 $item['post-reason'] = Item::PR_BTO;
1055 case Receiver::TARGET_BCC:
1056 $item['post-reason'] = Item::PR_BCC;
1058 case Receiver::TARGET_AUDIENCE:
1059 $item['post-reason'] = Item::PR_AUDIENCE;
1061 case Receiver::TARGET_FOLLOWER:
1062 $item['post-reason'] = Item::PR_FOLLOWER;
1064 case Receiver::TARGET_ANSWER:
1065 $item['post-reason'] = Item::PR_COMMENT;
1067 case Receiver::TARGET_GLOBAL:
1068 $item['post-reason'] = Item::PR_GLOBAL;
1071 $item['post-reason'] = Item::PR_NONE;
1074 $item['post-reason'] = Item::getPostReason($item);
1076 if (in_array($item['post-reason'], [Item::PR_GLOBAL, Item::PR_NONE])) {
1077 if (!empty($activity['from-relay'])) {
1078 $item['post-reason'] = Item::PR_RELAY;
1079 } elseif (!empty($activity['thread-completion'])) {
1080 $item['post-reason'] = Item::PR_FETCHED;
1081 } elseif (!empty($activity['push'])) {
1082 $item['post-reason'] = Item::PR_PUSHED;
1084 } elseif (($item['post-reason'] == Item::PR_FOLLOWER) && !empty($activity['from-relay'])) {
1085 // When a post arrives via a relay and we follow the author, we have to override the causer.
1086 // Otherwise the system assumes that we follow the relay. (See "addRowInformation")
1087 Logger::debug('Relay post for follower', ['receiver' => $receiver, 'guid' => $item['guid'], 'relay' => $activity['from-relay']]);
1088 $item['causer-id'] = ($item['gravity'] == Item::GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
1091 if ($item['isGroup']) {
1092 $item['contact-id'] = Contact::getIdForURL($item['group-link'], $receiver);
1094 $item['contact-id'] = Contact::getIdForURL($item['author-link'], $receiver);
1097 if (($receiver != 0) && empty($item['contact-id'])) {
1098 $item['contact-id'] = Contact::getIdForURL($activity['author']);
1101 if (!empty($activity['directmessage'])) {
1102 self::postMail($activity, $item);
1106 if (($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])) {
1107 if (!$item['isGroup']) {
1108 if ($item['post-reason'] == Item::PR_BCC) {
1109 Logger::info('Top level post via BCC from a non sharer, ignoring', ['uid' => $receiver, 'contact' => $item['contact-id'], 'url' => $item['uri']]);
1113 if ((DI::pConfig()->get($receiver, 'system', 'accept_only_sharer') != Item::COMPLETION_LIKE)
1114 && in_array($activity['thread-children-type'] ?? '', Receiver::ACTIVITY_TYPES)) {
1115 Logger::info('Top level post from thread completion from a non sharer had been initiated via an activity, ignoring',
1116 ['type' => $activity['thread-children-type'], 'user' => $item['uid'], 'causer' => $item['causer-link'], 'author' => $activity['author'], 'url' => $item['uri']]);
1122 $user = User::getById($receiver, ['account-type']);
1123 if (!empty($user['account-type'])) {
1124 $isGroup = ($user['account-type'] == User::ACCOUNT_TYPE_COMMUNITY);
1127 if ((DI::pConfig()->get($receiver, 'system', 'accept_only_sharer') == Item::COMPLETION_NONE)
1128 && ((!$isGroup && !$item['isGroup'] && ($activity['type'] != 'as:Announce'))
1129 || !Contact::isSharingByURL($activity['actor'], $receiver))) {
1130 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']]);
1134 Logger::info('Accepting post', ['uid' => $receiver, 'url' => $item['uri']]);
1137 if (!self::hasParents($item, $receiver)) {
1141 if (($item['gravity'] != Item::GRAVITY_ACTIVITY) && ($activity['object_type'] == 'as:Event')) {
1142 $event_id = self::createEvent($activity, $item);
1144 $item = Event::getItemArrayForImportedId($event_id, $item);
1147 $item_id = Item::insert($item);
1149 Logger::info('Item insertion successful', ['user' => $item['uid'], 'item_id' => $item_id]);
1152 Logger::notice('Item insertion aborted', ['uri' => $item['uri'], 'uid' => $item['uid']]);
1153 if (($item['uid'] == 0) && (count($activity['receiver']) > 1)) {
1154 Logger::info('Public item was aborted. We skip for all users.', ['uri' => $item['uri']]);
1159 if ($item['uid'] == 0) {
1164 Queue::remove($activity);
1166 if ($success && Queue::hasChildren($item['uri']) && Post::exists(['uri' => $item['uri']])) {
1167 Queue::processReplyByUri($item['uri']);
1170 // Store send a follow request for every reshare - but only when the item had been stored
1171 if ($stored && ($item['private'] != Item::PRIVATE) && ($item['gravity'] == Item::GRAVITY_PARENT) && !empty($item['author-link']) && ($item['author-link'] != $item['owner-link'])) {
1172 $author = APContact::getByURL($item['owner-link'], false);
1173 // We send automatic follow requests for reshared messages. (We don't need though for group posts)
1174 if ($author['type'] != 'Group') {
1175 Logger::info('Send follow request', ['uri' => $item['uri'], 'stored' => $stored, 'to' => $item['author-link']]);
1176 ActivityPub\Transmitter::sendFollowObject($item['uri'], $item['author-link']);
1182 * Checks if there are parent posts for the given receiver.
1183 * If not, then the system will try to add them.
1185 * @param array $item
1186 * @param integer $receiver
1189 private static function hasParents(array $item, int $receiver)
1191 if (($receiver == 0) || ($item['gravity'] == Item::GRAVITY_PARENT)) {
1195 $fields = ['causer-id' => $item['causer-id'] ?? $item['author-id'], 'post-reason' => Item::PR_FETCHED];
1199 if ($item['verb'] != Activity::ANNOUNCE) {
1200 switch (DI::pConfig()->get($receiver, 'system', 'accept_only_sharer')) {
1201 case Item::COMPLETION_COMMENT:
1202 $add_parent = ($item['gravity'] != Item::GRAVITY_ACTIVITY);
1205 case Item::COMPLETION_NONE:
1206 $add_parent = false;
1212 $add_parent = Contact::isSharing($fields['causer-id'], $receiver);
1213 if (!$add_parent && ($item['author-id'] != $fields['causer-id'])) {
1214 $add_parent = Contact::isSharing($item['author-id'], $receiver);
1216 if (!$add_parent && !in_array($item['owner-id'], [$fields['causer-id'], $item['author-id']])) {
1217 $add_parent = Contact::isSharing($item['owner-id'], $receiver);
1221 $has_parents = false;
1223 if (!empty($item['parent-uri-id'])) {
1224 if (Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $receiver])) {
1225 $has_parents = true;
1226 } elseif ($add_parent && Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1227 $stored = Item::storeForUserByUriId($item['parent-uri-id'], $receiver, $fields);
1228 $has_parents = (bool)$stored;
1230 Logger::notice('Inserted missing parent post', ['stored' => $stored, 'uid' => $receiver, 'parent' => $item['parent-uri']]);
1232 Logger::notice('Parent could not be added.', ['uid' => $receiver, 'uri' => $item['uri'], 'parent' => $item['parent-uri']]);
1235 } elseif ($add_parent) {
1236 Logger::debug('Parent does not exist.', ['uid' => $receiver, 'uri' => $item['uri'], 'parent' => $item['parent-uri']]);
1238 Logger::debug('Parent should not be added.', ['uid' => $receiver, 'gravity' => $item['gravity'], 'verb' => $item['verb'], 'guid' => $item['guid'], 'uri' => $item['uri'], 'parent' => $item['parent-uri']]);
1242 if (empty($item['parent-uri-id']) || ($item['thr-parent-id'] != $item['parent-uri-id'])) {
1243 if (Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $receiver])) {
1244 $has_parents = true;
1245 } elseif (($has_parents || $add_parent) && Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => 0])) {
1246 $stored = Item::storeForUserByUriId($item['thr-parent-id'], $receiver, $fields);
1247 $has_parents = $has_parents || (bool)$stored;
1249 Logger::notice('Inserted missing thread parent post', ['stored' => $stored, 'uid' => $receiver, 'thread-parent' => $item['thr-parent']]);
1251 Logger::notice('Thread parent could not be added.', ['uid' => $receiver, 'uri' => $item['uri'], 'thread-parent' => $item['thr-parent']]);
1253 } elseif ($add_parent) {
1254 Logger::debug('Thread parent does not exist.', ['uid' => $receiver, 'uri' => $item['uri'], 'thread-parent' => $item['thr-parent']]);
1256 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']]);
1260 return $has_parents;
1264 * Store tags and mentions into the tag table
1266 * @param integer $uriid
1267 * @param array $tags
1269 private static function storeTags(int $uriid, array $tags = null)
1271 foreach ($tags as $tag) {
1272 if (empty($tag['name']) || empty($tag['type']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
1276 $hash = substr($tag['name'], 0, 1);
1278 if ($tag['type'] == 'Mention') {
1279 if (in_array($hash, [Tag::TAG_CHARACTER[Tag::MENTION],
1280 Tag::TAG_CHARACTER[Tag::EXCLUSIVE_MENTION],
1281 Tag::TAG_CHARACTER[Tag::IMPLICIT_MENTION]])) {
1282 $tag['name'] = substr($tag['name'], 1);
1284 $type = Tag::IMPLICIT_MENTION;
1286 if (!empty($tag['href'])) {
1287 $apcontact = APContact::getByURL($tag['href']);
1288 if (!empty($apcontact['name']) || !empty($apcontact['nick'])) {
1289 $tag['name'] = $apcontact['name'] ?: $apcontact['nick'];
1292 } elseif ($tag['type'] == 'Hashtag') {
1293 if ($hash == Tag::TAG_CHARACTER[Tag::HASHTAG]) {
1294 $tag['name'] = substr($tag['name'], 1);
1296 $type = Tag::HASHTAG;
1299 if (empty($tag['name'])) {
1303 Tag::store($uriid, $type, $tag['name'], $tag['href']);
1307 public static function storeReceivers(int $uriid, array $receivers)
1309 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 => $type) {
1310 if (!empty($receivers[$element])) {
1311 foreach ($receivers[$element] as $receiver) {
1312 if ($receiver == ActivityPub::PUBLIC_COLLECTION) {
1313 $name = Receiver::PUBLIC_COLLECTION;
1314 } elseif ($path = parse_url($receiver, PHP_URL_PATH)) {
1315 $name = trim($path, '/');
1316 } elseif ($host = parse_url($receiver, PHP_URL_HOST)) {
1319 Logger::warning('Unable to coerce name from receiver', ['element' => $element, 'type' => $type, 'receiver' => $receiver]);
1323 $target = Tag::getTargetType($receiver);
1324 Logger::debug('Got target type', ['type' => $target, 'url' => $receiver]);
1325 Tag::store($uriid, $type, $name, $receiver, $target);
1332 * Creates an mail post
1334 * @param array $activity Activity data
1335 * @param array $item item array
1336 * @return int|bool New mail table row id or false on error
1337 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1339 private static function postMail(array $activity, array $item)
1341 if (($item['gravity'] != Item::GRAVITY_PARENT) && !DBA::exists('mail', ['uri' => $item['thr-parent'], 'uid' => $item['uid']])) {
1342 Logger::info('Parent not found, mail will be discarded.', ['uid' => $item['uid'], 'uri' => $item['thr-parent']]);
1346 Logger::info('Direct Message', $item);
1349 $msg['uid'] = $item['uid'];
1351 $msg['contact-id'] = $item['contact-id'];
1353 $contact = Contact::getById($item['contact-id'], ['name', 'url', 'photo']);
1354 $msg['from-name'] = $contact['name'];
1355 $msg['from-url'] = $contact['url'];
1356 $msg['from-photo'] = $contact['photo'];
1358 $msg['uri'] = $item['uri'];
1359 $msg['created'] = $item['created'];
1361 $parent = DBA::selectFirst('mail', ['parent-uri', 'title'], ['uri' => $item['thr-parent']]);
1362 if (DBA::isResult($parent)) {
1363 $msg['parent-uri'] = $parent['parent-uri'];
1364 $msg['title'] = $parent['title'];
1366 $msg['parent-uri'] = $item['thr-parent'];
1368 if (!empty($item['title'])) {
1369 $msg['title'] = $item['title'];
1370 } elseif (!empty($item['content-warning'])) {
1371 $msg['title'] = $item['content-warning'];
1373 // Trying to generate a title out of the body
1374 $title = $item['body'];
1376 while (preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $title, $matches)) {
1377 $title = $matches[3];
1380 $title = trim(BBCode::toPlaintext($title));
1382 if (strlen($title) > 20) {
1383 $title = substr($title, 0, 20) . '...';
1386 $msg['title'] = $title;
1389 $msg['body'] = $item['body'];
1391 return Mail::insert($msg);
1395 * Fetch featured posts from a contact with the given url
1397 * @param string $url
1400 public static function fetchFeaturedPosts(string $url)
1402 Logger::info('Fetch featured posts', ['contact' => $url]);
1404 $apcontact = APContact::getByURL($url);
1405 if (empty($apcontact['featured'])) {
1406 Logger::info('Contact does not have a featured collection', ['contact' => $url]);
1410 $pcid = Contact::getIdForURL($url, 0, false);
1412 Logger::notice('Contact not found', ['contact' => $url]);
1416 $posts = Post\Collection::selectToArrayForContact($pcid, Post\Collection::FEATURED);
1417 if (!empty($posts)) {
1418 $old_featured = array_column($posts, 'uri-id');
1423 $featured = ActivityPub::fetchItems($apcontact['featured']);
1424 if (empty($featured)) {
1425 Logger::info('Contact does not have featured posts', ['contact' => $url]);
1427 foreach ($old_featured as $uri_id) {
1428 Post\Collection::remove($uri_id, Post\Collection::FEATURED);
1429 Logger::debug('Removed no longer featured post', ['uri-id' => $uri_id, 'contact' => $url]);
1437 foreach ($featured as $post) {
1438 if (empty($post['id'])) {
1441 $id = Item::fetchByLink($post['id']);
1443 $item = Post::selectFirst(['uri-id', 'featured', 'author-id'], ['id' => $id]);
1444 if (!empty($item['uri-id'])) {
1445 if (!$item['featured']) {
1446 Post\Collection::add($item['uri-id'], Post\Collection::FEATURED, $item['author-id']);
1447 Logger::debug('Added featured post', ['uri-id' => $item['uri-id'], 'contact' => $url]);
1450 Logger::debug('Post already had been featured', ['uri-id' => $item['uri-id'], 'contact' => $url]);
1454 $index = array_search($item['uri-id'], $old_featured);
1455 if (!($index === false)) {
1456 unset($old_featured[$index]);
1462 foreach ($old_featured as $uri_id) {
1463 Post\Collection::remove($uri_id, Post\Collection::FEATURED);
1464 Logger::debug('Removed no longer featured post', ['uri-id' => $uri_id, 'contact' => $url]);
1467 Logger::info('Fetched featured posts', ['new' => $new, 'old' => $old, 'contact' => $url]);
1470 public static function fetchCachedActivity(string $url, int $uid): array
1472 $cachekey = self::CACHEKEY_FETCH_ACTIVITY . $uid . ':' . hash('sha256', $url);
1473 $object = DI::cache()->get($cachekey);
1475 if (!is_null($object)) {
1476 if (!empty($object)) {
1477 Logger::debug('Fetch from cache', ['url' => $url, 'uid' => $uid]);
1479 Logger::debug('Fetch from negative cache', ['url' => $url, 'uid' => $uid]);
1484 $object = ActivityPub::fetchContent($url, $uid);
1485 if (empty($object)) {
1486 Logger::notice('Activity was not fetchable, aborting.', ['url' => $url, 'uid' => $uid]);
1487 // We perform negative caching.
1488 DI::cache()->set($cachekey, [], Duration::FIVE_MINUTES);
1492 if (empty($object['id'])) {
1493 Logger::notice('Activity has got not id, aborting. ', ['url' => $url, 'object' => $object]);
1496 DI::cache()->set($cachekey, $object, Duration::FIVE_MINUTES);
1498 Logger::debug('Activity was fetched successfully', ['url' => $url, 'uid' => $uid]);
1504 * Fetches missing posts
1506 * @param string $url message URL
1507 * @param array $child activity array with the child of this message
1508 * @param string $relay_actor Relay actor
1509 * @param int $completion Completion mode, see Receiver::COMPLETION_*
1510 * @param int $uid User id that is used to fetch the activity
1511 * @return string fetched message URL
1512 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1513 * @throws \ImagickException
1515 public static function fetchMissingActivity(string $url, array $child = [], string $relay_actor = '', int $completion = Receiver::COMPLETION_MANUAL, int $uid = 0): string
1517 $object = self::fetchCachedActivity($url, $uid);
1518 if (empty($object)) {
1524 if (!empty($object['attributedTo'])) {
1525 $attributed_to = $object['attributedTo'];
1526 if (is_array($attributed_to)) {
1527 $compacted = JsonLD::compact($object);
1528 $attributed_to = JsonLD::fetchElement($compacted, 'as:attributedTo', '@id');
1530 $signer[] = $attributed_to;
1533 if (!empty($object['actor'])) {
1534 $object_actor = $object['actor'];
1535 } elseif (!empty($attributed_to)) {
1536 $object_actor = $attributed_to;
1542 $signer[] = $object_actor;
1544 if (!empty($child['author'])) {
1545 $actor = $child['author'];
1548 $actor = $object_actor;
1551 if (!empty($object['published'])) {
1552 $published = $object['published'];
1553 } elseif (!empty($child['published'])) {
1554 $published = $child['published'];
1556 $published = DateTimeFormat::utcNow();
1560 $activity['@context'] = $object['@context'] ?? ActivityPub::CONTEXT;
1561 unset($object['@context']);
1562 $activity['id'] = $object['id'];
1563 $activity['to'] = $object['to'] ?? [];
1564 $activity['cc'] = $object['cc'] ?? [];
1565 $activity['audience'] = $object['audience'] ?? [];
1566 $activity['actor'] = $actor;
1567 $activity['object'] = $object;
1568 $activity['published'] = $published;
1569 $activity['type'] = 'Create';
1571 $ldactivity = JsonLD::compact($activity);
1573 $ldactivity['recursion-depth'] = !empty($child['recursion-depth']) ? $child['recursion-depth'] + 1 : 0;
1575 if ($object_actor != $actor) {
1576 Contact::updateByUrlIfNeeded($object_actor);
1579 Contact::updateByUrlIfNeeded($actor);
1581 if (!empty($child['thread-completion'])) {
1582 $ldactivity['thread-completion'] = $child['thread-completion'];
1583 $ldactivity['completion-mode'] = $child['completion-mode'] ?? Receiver::COMPLETION_NONE;
1585 $ldactivity['thread-completion'] = Contact::getIdForURL($relay_actor ?: $actor);
1586 $ldactivity['completion-mode'] = $completion;
1589 if ($completion == Receiver::COMPLETION_RELAY) {
1590 $ldactivity['from-relay'] = $ldactivity['thread-completion'];
1591 if (!self::acceptIncomingMessage($ldactivity, $object['id'])) {
1596 if (!empty($child['thread-children-type'])) {
1597 $ldactivity['thread-children-type'] = $child['thread-children-type'];
1598 } elseif (!empty($child['type'])) {
1599 $ldactivity['thread-children-type'] = $child['type'];
1601 $ldactivity['thread-children-type'] = 'as:Create';
1604 if (($completion == Receiver::COMPLETION_RELAY) && Queue::exists($url, 'as:Create')) {
1605 Logger::info('Activity has already been queued.', ['url' => $url, 'object' => $activity['id']]);
1606 } elseif (ActivityPub\Receiver::processActivity($ldactivity, json_encode($activity), $uid, true, false, $signer, '', $completion)) {
1607 Logger::info('Activity had been fetched and processed.', ['url' => $url, 'entry' => $child['entry-id'] ?? 0, 'completion' => $completion, 'object' => $activity['id']]);
1609 Logger::info('Activity had been fetched and will be processed later.', ['url' => $url, 'entry' => $child['entry-id'] ?? 0, 'completion' => $completion, 'object' => $activity['id']]);
1612 return $activity['id'];
1616 * Test if incoming relay messages should be accepted
1618 * @param array $activity activity array
1619 * @param string $id object ID
1620 * @return boolean true if message is accepted
1622 private static function acceptIncomingMessage(array $activity, string $id): bool
1624 if (empty($activity['as:object'])) {
1625 Logger::info('No object field in activity - accepted', ['id' => $id]);
1629 $replyto = JsonLD::fetchElement($activity['as:object'], 'as:inReplyTo', '@id');
1630 $uriid = ItemURI::getIdByURI($replyto ?? '');
1631 if (Post::exists(['uri-id' => $uriid])) {
1632 Logger::info('Post is a reply to an existing post - accepted', ['id' => $id, 'uri-id' => $uriid, 'replyto' => $replyto]);
1636 $attributed_to = JsonLD::fetchElement($activity['as:object'], 'as:attributedTo', '@id');
1637 $authorid = Contact::getIdForURL($attributed_to);
1639 $body = HTML::toBBCode(JsonLD::fetchElement($activity['as:object'], 'as:content', '@value') ?? '');
1642 $tags = Receiver::processTags(JsonLD::fetchElementArray($activity['as:object'], 'as:tag') ?? []);
1643 if (!empty($tags)) {
1644 foreach ($tags as $tag) {
1645 if ($tag['type'] != 'Hashtag') {
1648 $messageTags[] = ltrim(mb_strtolower($tag['name']), '#');
1652 return Relay::isSolicitedPost($messageTags, $body, $authorid, $id, Protocol::ACTIVITYPUB, $activity['thread-completion'] ?? 0);
1656 * perform a "follow" request
1658 * @param array $activity
1660 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1661 * @throws \ImagickException
1663 public static function followUser(array $activity)
1665 $uid = User::getIdForURL($activity['object_id']);
1667 Queue::remove($activity);
1671 $owner = User::getOwnerDataById($uid);
1672 if (empty($owner)) {
1676 $cid = Contact::getIdForURL($activity['actor'], $uid);
1678 self::switchContact($cid);
1679 Contact::update(['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
1683 'author-id' => Contact::getIdForURL($activity['actor']),
1684 'author-link' => $activity['actor'],
1687 // Ensure that the contact has got the right network type
1688 self::switchContact($item['author-id']);
1690 $result = Contact::addRelationship($owner, [], $item, false, $activity['content'] ?? '');
1691 if ($result === true) {
1692 ActivityPub\Transmitter::sendContactAccept($item['author-link'], $activity['id'], $owner['uid']);
1695 $cid = Contact::getIdForURL($activity['actor'], $uid);
1700 if ($result && DI::config()->get('system', 'transmit_pending_events') && ($owner['contact-type'] == Contact::TYPE_COMMUNITY)) {
1701 self::transmitPendingEvents($cid, $owner['uid']);
1704 if (empty($contact)) {
1705 Contact::update(['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
1707 Logger::notice('Follow user ' . $uid . ' from contact ' . $cid . ' with id ' . $activity['id']);
1708 Queue::remove($activity);
1712 * Transmit pending events to the new follower
1714 * @param integer $cid Contact id
1715 * @param integer $uid User id
1718 private static function transmitPendingEvents(int $cid, int $uid)
1720 $account = DBA::selectFirst('account-user-view', ['ap-inbox', 'ap-sharedinbox'], ['id' => $cid]);
1721 $inbox = $account['ap-sharedinbox'] ?: $account['ap-inbox'];
1723 $events = DBA::select('event', ['id'], ["`uid` = ? AND `start` > ? AND `type` != ?", $uid, DateTimeFormat::utcNow(), 'birthday']);
1724 while ($event = DBA::fetch($events)) {
1725 $post = Post::selectFirst(['id', 'uri-id', 'created'], ['event-id' => $event['id']]);
1729 if (DI::config()->get('system', 'bulk_delivery')) {
1730 Post\Delivery::add($post['uri-id'], $uid, $inbox, $post['created'], Delivery::POST, [$cid]);
1731 Worker::add(Worker::PRIORITY_HIGH, 'APDelivery', '', 0, $inbox, 0);
1733 Worker::add(Worker::PRIORITY_HIGH, 'APDelivery', Delivery::POST, $post['id'], $inbox, $uid, [$cid], $post['uri-id']);
1739 * Update the given profile
1741 * @param array $activity
1742 * @throws \Exception
1744 public static function updatePerson(array $activity)
1746 if (empty($activity['object_id'])) {
1750 Logger::info('Updating profile', ['object' => $activity['object_id']]);
1751 Contact::updateFromProbeByURL($activity['object_id']);
1752 Queue::remove($activity);
1756 * Delete the given profile
1758 * @param array $activity
1760 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1762 public static function deletePerson(array $activity)
1764 if (empty($activity['object_id']) || empty($activity['actor'])) {
1765 Logger::info('Empty object id or actor.');
1766 Queue::remove($activity);
1770 if ($activity['object_id'] != $activity['actor']) {
1771 Logger::info('Object id does not match actor.');
1772 Queue::remove($activity);
1776 $contacts = DBA::select('contact', ['id'], ['nurl' => Strings::normaliseLink($activity['object_id'])]);
1777 while ($contact = DBA::fetch($contacts)) {
1778 Contact::remove($contact['id']);
1780 DBA::close($contacts);
1782 Logger::info('Deleted contact', ['object' => $activity['object_id']]);
1783 Queue::remove($activity);
1787 * Add moved contacts as followers for all subscribers of the old contact
1789 * @param array $activity
1791 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1793 public static function movePerson(array $activity)
1795 if (empty($activity['target_id']) || empty($activity['object_id'])) {
1796 Queue::remove($activity);
1800 if ($activity['object_id'] != $activity['actor']) {
1801 Logger::notice('Object is not the actor', ['activity' => $activity]);
1802 Queue::remove($activity);
1806 $from = Contact::getByURL($activity['object_id'], false, ['uri-id']);
1807 if (empty($from['uri-id'])) {
1808 Logger::info('Object not found', ['activity' => $activity]);
1809 Queue::remove($activity);
1813 $contacts = DBA::select('contact', ['uid', 'url'], ["`uri-id` = ? AND `uid` != ? AND `rel` IN (?, ?)", $from['uri-id'], 0, Contact::FRIEND, Contact::SHARING]);
1814 while ($from_contact = DBA::fetch($contacts)) {
1815 $result = Contact::createFromProbeForUser($from_contact['uid'], $activity['target_id']);
1816 Logger::debug('Follower added', ['from' => $from_contact, 'result' => $result]);
1818 DBA::close($contacts);
1819 Queue::remove($activity);
1823 * Blocks the user by the contact
1825 * @param array $activity
1827 * @throws \Exception
1829 public static function blockAccount(array $activity)
1831 $cid = Contact::getIdForURL($activity['actor']);
1836 $uid = User::getIdForURL($activity['object_id']);
1841 Contact\User::setIsBlocked($cid, $uid, true);
1843 Logger::info('Contact blocked user', ['contact' => $cid, 'user' => $uid]);
1844 Queue::remove($activity);
1848 * Unblocks the user by the contact
1850 * @param array $activity
1852 * @throws \Exception
1854 public static function unblockAccount(array $activity)
1856 $cid = Contact::getIdForURL($activity['actor']);
1861 $uid = User::getIdForURL($activity['object_object']);
1866 Contact\User::setIsBlocked($cid, $uid, false);
1868 Logger::info('Contact unblocked user', ['contact' => $cid, 'user' => $uid]);
1869 Queue::remove($activity);
1875 * @param array $activity
1877 * @throws \Exception
1879 public static function ReportAccount(array $activity)
1881 $account_id = Contact::getIdForURL($activity['object_id']);
1882 if (empty($account_id)) {
1883 Logger::info('Unknown account', ['activity' => $activity]);
1884 Queue::remove($activity);
1888 $reporter_id = Contact::getIdForURL($activity['actor']);
1889 if (empty($reporter_id)) {
1890 Logger::info('Unknown actor', ['activity' => $activity]);
1891 Queue::remove($activity);
1896 foreach ($activity['object_ids'] as $status_id) {
1897 $post = Post::selectFirst(['uri-id'], ['uri' => $status_id]);
1898 if (!empty($post['uri-id'])) {
1899 $uri_ids[] = $post['uri-id'];
1903 $report = DI::reportFactory()->createFromReportsRequest($reporter_id, $account_id, $activity['content'], null, '', false, $uri_ids);
1904 DI::report()->save($report);
1906 Logger::info('Stored report', ['reporter' => $reporter_id, 'account_id' => $account_id, 'comment' => $activity['content'], 'object_ids' => $activity['object_ids']]);
1910 * Accept a follow request
1912 * @param array $activity
1913 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1914 * @throws \ImagickException
1916 public static function acceptFollowUser(array $activity)
1918 if (!empty($activity['object_actor'])) {
1919 $uid = User::getIdForURL($activity['object_actor']);
1921 } elseif (!empty($activity['receiver']) && (count($activity['receiver']) == 1)) {
1922 $uid = array_shift($activity['receiver']);
1927 Logger::notice('User could not be detected', ['activity' => $activity]);
1928 Queue::remove($activity);
1932 $cid = Contact::getIdForURL($activity['actor'], $uid);
1934 Logger::notice('No contact found', ['actor' => $activity['actor']]);
1935 Queue::remove($activity);
1939 $id = Transmitter::activityIDFromContact($cid);
1940 if ($id == $activity['object_id']) {
1941 Logger::info('Successful id check', ['uid' => $uid, 'cid' => $cid]);
1943 Logger::info('Unsuccessful id check', ['uid' => $uid, 'cid' => $cid, 'id' => $id, 'object_id' => $activity['object_id']]);
1945 Queue::remove($activity);
1950 self::switchContact($cid);
1952 $fields = ['pending' => false];
1954 $contact = DBA::selectFirst('contact', ['rel'], ['id' => $cid]);
1955 if ($contact['rel'] == Contact::FOLLOWER) {
1956 $fields['rel'] = Contact::FRIEND;
1959 $condition = ['id' => $cid];
1960 Contact::update($fields, $condition);
1961 Logger::info('Accept contact request', ['contact' => $cid, 'user' => $uid]);
1962 Queue::remove($activity);
1966 * Reject a follow request
1968 * @param array $activity
1969 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1970 * @throws \ImagickException
1972 public static function rejectFollowUser(array $activity)
1974 $uid = User::getIdForURL($activity['object_actor']);
1979 $cid = Contact::getIdForURL($activity['actor'], $uid);
1981 Logger::info('No contact found', ['actor' => $activity['actor']]);
1985 self::switchContact($cid);
1987 $contact = Contact::getById($cid, ['rel']);
1988 if ($contact['rel'] == Contact::SHARING) {
1989 Contact::remove($cid);
1990 Logger::info('Rejected contact request - contact removed', ['contact' => $cid, 'user' => $uid]);
1991 } elseif ($contact['rel'] == Contact::FRIEND) {
1992 Contact::update(['rel' => Contact::FOLLOWER], ['id' => $cid]);
1994 Logger::info('Rejected contact request', ['contact' => $cid, 'user' => $uid]);
1996 Queue::remove($activity);
2000 * Undo activity like "like" or "dislike"
2002 * @param array $activity
2003 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2004 * @throws \ImagickException
2006 public static function undoActivity(array $activity)
2008 if (empty($activity['object_id'])) {
2012 if (empty($activity['object_actor'])) {
2016 $author_id = Contact::getIdForURL($activity['object_actor']);
2017 if (empty($author_id)) {
2021 Item::markForDeletion(['uri' => $activity['object_id'], 'author-id' => $author_id, 'gravity' => Item::GRAVITY_ACTIVITY]);
2022 Queue::remove($activity);
2026 * Activity to remove a follower
2028 * @param array $activity
2029 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2030 * @throws \ImagickException
2032 public static function undoFollowUser(array $activity)
2034 $uid = User::getIdForURL($activity['object_object']);
2039 $owner = User::getOwnerDataById($uid);
2040 if (empty($owner)) {
2044 $cid = Contact::getIdForURL($activity['actor'], $uid);
2046 Logger::info('No contact found', ['actor' => $activity['actor']]);
2050 self::switchContact($cid);
2052 $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
2053 if (!DBA::isResult($contact)) {
2057 Contact::removeFollower($contact);
2058 Logger::info('Undo following request', ['contact' => $cid, 'user' => $uid]);
2059 Queue::remove($activity);
2063 * Switches a contact to AP if needed
2065 * @param integer $cid Contact ID
2067 * @throws \Exception
2069 private static function switchContact(int $cid)
2071 $contact = DBA::selectFirst('contact', ['network', 'url'], ['id' => $cid]);
2072 if (!DBA::isResult($contact) || in_array($contact['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN]) || Contact::isLocal($contact['url'])) {
2076 Logger::info('Change existing contact', ['cid' => $cid, 'previous' => $contact['network']]);
2077 Contact::updateFromProbe($cid);
2081 * Collects implicit mentions like:
2082 * - the author of the parent item
2083 * - all the mentioned conversants in the parent item
2085 * @param array $parent Item array with at least ['id', 'author-link', 'alias']
2087 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2089 private static function getImplicitMentionList(array $parent): array
2091 $parent_terms = Tag::getByURIId($parent['uri-id'], [Tag::MENTION, Tag::IMPLICIT_MENTION, Tag::EXCLUSIVE_MENTION]);
2093 $parent_author = Contact::getByURL($parent['author-link'], false, ['url', 'nurl', 'alias']);
2095 $implicit_mentions = [];
2096 if (empty($parent_author['url'])) {
2097 Logger::notice('Author public contact unknown.', ['author-link' => $parent['author-link'], 'parent-id' => $parent['id']]);
2099 $implicit_mentions[] = $parent_author['url'];
2100 $implicit_mentions[] = $parent_author['nurl'];
2101 $implicit_mentions[] = $parent_author['alias'];
2104 if (!empty($parent['alias'])) {
2105 $implicit_mentions[] = $parent['alias'];
2108 foreach ($parent_terms as $term) {
2109 $contact = Contact::getByURL($term['url'], false, ['url', 'nurl', 'alias']);
2110 if (!empty($contact['url'])) {
2111 $implicit_mentions[] = $contact['url'];
2112 $implicit_mentions[] = $contact['nurl'];
2113 $implicit_mentions[] = $contact['alias'];
2117 return $implicit_mentions;
2121 * Strips from the body prepended implicit mentions
2123 * @param string $body
2124 * @param array $parent
2127 private static function removeImplicitMentionsFromBody(string $body, array $parent): string
2129 if (DI::config()->get('system', 'disable_implicit_mentions')) {
2133 $potential_mentions = self::getImplicitMentionList($parent);
2135 $kept_mentions = [];
2137 // Extract one prepended mention at a time from the body
2138 while(preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $body, $matches)) {
2139 if (!in_array($matches[2], $potential_mentions)) {
2140 $kept_mentions[] = $matches[1];
2143 $body = $matches[3];
2146 // Re-appending the kept mentions to the body after extraction
2147 $kept_mentions[] = $body;
2149 return implode('', $kept_mentions);
2153 * Adds links to string mentions
2155 * @param string $body
2156 * @param array $tags
2159 protected static function addMentionLinks(string $body, array $tags): string
2161 // This prevents links to be added again to Pleroma-style mention links
2162 $body = self::normalizeMentionLinks($body);
2164 $body = BBCode::performWithEscapedTags($body, ['url'], function ($body) use ($tags) {
2165 foreach ($tags as $tag) {
2166 if (empty($tag['name']) || empty($tag['type']) || empty($tag['href']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
2170 $hash = substr($tag['name'], 0, 1);
2171 $name = substr($tag['name'], 1);
2172 if (!in_array($hash, Tag::TAG_CHARACTER)) {
2174 $name = $tag['name'];
2177 if (Network::isValidHttpUrl($tag['href'])) {
2178 $body = str_replace($tag['name'], $hash . '[url=' . $tag['href'] . ']' . $name . '[/url]', $body);