3 * @copyright Copyright (C) 2010-2022, the Friendica project
5 * @license GNU AGPL version 3 or any later version
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU Affero General Public License as
9 * published by the Free Software Foundation, either version 3 of the
10 * License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU Affero General Public License for more details.
17 * You should have received a copy of the GNU Affero General Public License
18 * along with this program. If not, see <https://www.gnu.org/licenses/>.
22 namespace Friendica\Protocol\ActivityPub;
24 use Friendica\Content\Text\BBCode;
25 use Friendica\Content\Text\HTML;
26 use Friendica\Content\Text\Markdown;
27 use Friendica\Core\Logger;
28 use Friendica\Core\Protocol;
29 use Friendica\Core\System;
30 use Friendica\Core\Worker;
31 use Friendica\Database\DBA;
33 use Friendica\Model\APContact;
34 use Friendica\Model\Contact;
35 use Friendica\Model\Conversation;
36 use Friendica\Model\Event;
37 use Friendica\Model\GServer;
38 use Friendica\Model\Item;
39 use Friendica\Model\ItemURI;
40 use Friendica\Model\Mail;
41 use Friendica\Model\Tag;
42 use Friendica\Model\User;
43 use Friendica\Model\Post;
44 use Friendica\Protocol\Activity;
45 use Friendica\Protocol\ActivityPub;
46 use Friendica\Protocol\Relay;
47 use Friendica\Util\DateTimeFormat;
48 use Friendica\Util\HTTPSignature;
49 use Friendica\Util\JsonLD;
50 use Friendica\Util\Network;
51 use Friendica\Util\Strings;
52 use Friendica\Worker\Delivery;
55 * ActivityPub Processor Protocol class
60 * Extracts the tag character (#, @, !) from mention links
65 protected static function normalizeMentionLinks(string $body): string
67 return preg_replace('%\[url=([^\[\]]*)]([#@!])(.*?)\[/url]%ism', '$2[url=$1]$3[/url]', $body);
71 * Convert the language array into a language JSON
73 * @param array $languages
74 * @return string language JSON
76 private static function processLanguages(array $languages): string
78 $codes = array_keys($languages);
80 foreach ($codes as $code) {
88 return json_encode($lang);
91 * Replaces emojis in the body
95 * @param array $emojis
97 * @return string with replaced emojis
99 private static function replaceEmojis(int $uri_id, string $body, array $emojis): string
103 array_column($emojis, 'name'),
104 array_map(function ($emoji) {
105 return '[emoji=' . $emoji['href'] . ']' . $emoji['name'] . '[/emoji]';
110 // We store the emoji here to be able to avoid storing it in the media
111 foreach ($emojis as $emoji) {
112 Post\Link::getByLink($uri_id, $emoji['href']);
118 * Store attached media files in the post-media table
121 * @param array $attachment
124 private static function storeAttachmentAsMedia(int $uriid, array $attachment)
126 if (empty($attachment['url'])) {
130 $data = ['uri-id' => $uriid];
131 $data['type'] = Post\Media::UNKNOWN;
132 $data['url'] = $attachment['url'];
133 $data['mimetype'] = $attachment['mediaType'] ?? null;
134 $data['height'] = $attachment['height'] ?? null;
135 $data['width'] = $attachment['width'] ?? null;
136 $data['size'] = $attachment['size'] ?? null;
137 $data['preview'] = $attachment['image'] ?? null;
138 $data['description'] = $attachment['name'] ?? null;
140 Post\Media::insert($data);
144 * Stire attachment data
146 * @param array $activity
149 private static function storeAttachments(array $activity, array $item)
151 if (empty($activity['attachments'])) {
155 foreach ($activity['attachments'] as $attach) {
156 self::storeAttachmentAsMedia($item['uri-id'], $attach);
161 * Store attachment data
163 * @param array $activity
166 private static function storeQuestion(array $activity, array $item)
168 if (empty($activity['question'])) {
171 $question = ['multiple' => $activity['question']['multiple']];
173 if (!empty($activity['question']['voters'])) {
174 $question['voters'] = $activity['question']['voters'];
177 if (!empty($activity['question']['end-time'])) {
178 $question['end-time'] = DateTimeFormat::utc($activity['question']['end-time']);
181 Post\Question::update($item['uri-id'], $question);
183 foreach ($activity['question']['options'] as $key => $option) {
184 $option = ['name' => $option['name'], 'replies' => $option['replies']];
185 Post\QuestionOption::update($item['uri-id'], $key, $option);
188 Logger::debug('Storing incoming question', ['type' => $activity['type'], 'uri-id' => $item['uri-id'], 'question' => $activity['question']]);
194 * @param array $activity Activity array
195 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
196 * @throws \ImagickException
198 public static function updateItem(array $activity)
200 $item = Post::selectFirst(['uri', 'uri-id', 'thr-parent', 'gravity', 'post-type'], ['uri' => $activity['id']]);
201 if (!DBA::isResult($item)) {
202 Logger::warning('No existing item, item will be created', ['uri' => $activity['id']]);
203 $item = self::createItem($activity);
208 self::postItem($activity, $item);
212 $item['changed'] = DateTimeFormat::utcNow();
213 $item['edited'] = DateTimeFormat::utc($activity['updated']);
215 $item = self::processContent($activity, $item);
217 self::storeAttachments($activity, $item);
218 self::storeQuestion($activity, $item);
224 Post\History::add($item['uri-id'], $item);
225 Item::update($item, ['uri' => $activity['id']]);
227 Queue::remove($activity);
229 if ($activity['object_type'] == 'as:Event') {
230 $posts = Post::select(['event-id', 'uid'], ["`uri` = ? AND `event-id` > ?", $activity['id'], 0]);
231 while ($post = DBA::fetch($posts)) {
232 self::updateEvent($post['event-id'], $activity);
238 * Update an existing event
240 * @param int $event_id
241 * @param array $activity
243 private static function updateEvent(int $event_id, array $activity)
245 $event = DBA::selectFirst('event', [], ['id' => $event_id]);
247 $event['edited'] = DateTimeFormat::utc($activity['updated']);
248 $event['summary'] = HTML::toBBCode($activity['name']);
249 $event['desc'] = HTML::toBBCode($activity['content']);
250 if (!empty($activity['start-time'])) {
251 $event['start'] = DateTimeFormat::utc($activity['start-time']);
253 if (!empty($activity['end-time'])) {
254 $event['finish'] = DateTimeFormat::utc($activity['end-time']);
256 $event['nofinish'] = empty($event['finish']);
257 $event['location'] = $activity['location'];
259 Logger::info('Updating event', ['uri' => $activity['id'], 'id' => $event_id]);
260 Event::store($event);
264 * Prepares data for a message
266 * @param array $activity Activity array
267 * @return array Internal item
268 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
269 * @throws \ImagickException
271 public static function createItem(array $activity): array
274 $item['verb'] = Activity::POST;
275 $item['thr-parent'] = $activity['reply-to-id'];
277 if ($activity['reply-to-id'] == $activity['id']) {
278 $item['gravity'] = GRAVITY_PARENT;
279 $item['object-type'] = Activity\ObjectType::NOTE;
281 $item['gravity'] = GRAVITY_COMMENT;
282 $item['object-type'] = Activity\ObjectType::COMMENT;
285 if (!empty($activity['context'])) {
286 $item['conversation'] = $activity['context'];
287 } elseif (!empty($activity['conversation'])) {
288 $item['conversation'] = $activity['conversation'];
291 if (!empty($item['conversation'])) {
292 $conversation = Post::selectFirstThread(['uri'], ['conversation' => $item['conversation']]);
293 if (!empty($conversation)) {
294 Logger::debug('Got conversation', ['conversation' => $item['conversation'], 'parent' => $conversation]);
295 $item['parent-uri'] = $conversation['uri'];
301 if (empty($activity['directmessage']) && ($activity['id'] != $activity['reply-to-id']) && !Post::exists(['uri' => $activity['reply-to-id']])) {
302 $recursion_depth = $activity['recursion-depth'] ?? 0;
303 Logger::notice('Parent not found. Try to refetch it.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
304 if ($recursion_depth < 10) {
305 $result = self::fetchMissingActivity($activity['reply-to-id'], $activity, '', Receiver::COMPLETION_AUTO);
306 if (empty($result) && self::ActivityIsGone($activity['reply-to-id'])) {
307 // Recursively delete this and all depending entries
308 Queue::deleteById($activity['entry-id']);
311 $fetch_by_worker = empty($result);
313 Logger::notice('Recursion level is too high.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
314 $fetch_by_worker = true;
317 if ($fetch_by_worker && Queue::hasWorker($activity)) {
318 Logger::notice('There is already a worker task to fetch the post.', ['id' => $activity['id'], 'parent' => $activity['reply-to-id']]);
319 $fetch_by_worker = false;
320 if (!empty($conversation)) {
325 if ($fetch_by_worker) {
326 Logger::notice('Fetching is done by worker.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
327 $activity['recursion-depth'] = 0;
328 $wid = Worker::add(PRIORITY_HIGH, 'FetchMissingActivity', $activity['reply-to-id'], $activity, '', Receiver::COMPLETION_AUTO);
329 Queue::setWorkerId($activity, $wid);
330 if (!empty($conversation)) {
333 } elseif (!empty($result)) {
334 if (($item['thr-parent'] != $result) && Post::exists(['uri' => $result])) {
335 $item['thr-parent'] = $result;
340 $item['diaspora_signed_text'] = $activity['diaspora:comment'] ?? '';
342 if (empty($conversation) && empty($activity['directmessage']) && ($item['gravity'] != GRAVITY_PARENT) && !Post::exists(['uri' => $item['thr-parent']])) {
343 Logger::info('Parent not found, message will be discarded.', ['thr-parent' => $item['thr-parent']]);
347 $item['network'] = Protocol::ACTIVITYPUB;
348 $item['author-link'] = $activity['author'];
349 $item['author-id'] = Contact::getIdForURL($activity['author']);
350 $item['owner-link'] = $activity['actor'];
351 $item['owner-id'] = Contact::getIdForURL($activity['actor']);
353 if (in_array(0, $activity['receiver']) && !empty($activity['unlisted'])) {
354 $item['private'] = Item::UNLISTED;
355 } elseif (in_array(0, $activity['receiver'])) {
356 $item['private'] = Item::PUBLIC;
358 $item['private'] = Item::PRIVATE;
361 if (!empty($activity['raw'])) {
362 $item['source'] = $activity['raw'];
363 $item['protocol'] = Conversation::PARCEL_ACTIVITYPUB;
364 $item['conversation-href'] = $activity['context'] ?? '';
365 $item['conversation-uri'] = $activity['conversation'] ?? '';
367 if (isset($activity['push'])) {
368 $item['direction'] = $activity['push'] ? Conversation::PUSH : Conversation::PULL;
372 if (!empty($activity['from-relay'])) {
373 $item['direction'] = Conversation::RELAY;
376 if ($activity['object_type'] == 'as:Article') {
377 $item['post-type'] = Item::PT_ARTICLE;
378 } elseif ($activity['object_type'] == 'as:Audio') {
379 $item['post-type'] = Item::PT_AUDIO;
380 } elseif ($activity['object_type'] == 'as:Document') {
381 $item['post-type'] = Item::PT_DOCUMENT;
382 } elseif ($activity['object_type'] == 'as:Event') {
383 $item['post-type'] = Item::PT_EVENT;
384 } elseif ($activity['object_type'] == 'as:Image') {
385 $item['post-type'] = Item::PT_IMAGE;
386 } elseif ($activity['object_type'] == 'as:Page') {
387 $item['post-type'] = Item::PT_PAGE;
388 } elseif ($activity['object_type'] == 'as:Question') {
389 $item['post-type'] = Item::PT_POLL;
390 } elseif ($activity['object_type'] == 'as:Video') {
391 $item['post-type'] = Item::PT_VIDEO;
393 $item['post-type'] = Item::PT_NOTE;
396 $item['isForum'] = false;
398 if (!empty($activity['thread-completion'])) {
399 if ($activity['thread-completion'] != $item['owner-id']) {
400 $actor = Contact::getById($activity['thread-completion'], ['url']);
401 $item['causer-link'] = $actor['url'];
402 $item['causer-id'] = $activity['thread-completion'];
403 Logger::info('Use inherited actor as causer.', ['id' => $item['owner-id'], 'activity' => $activity['thread-completion'], 'owner' => $item['owner-link'], 'actor' => $actor['url']]);
405 // Store the original actor in the "causer" fields to enable the check for ignored or blocked contacts
406 $item['causer-link'] = $item['owner-link'];
407 $item['causer-id'] = $item['owner-id'];
408 Logger::info('Use actor as causer.', ['id' => $item['owner-id'], 'actor' => $item['owner-link']]);
411 $item['owner-link'] = $item['author-link'];
412 $item['owner-id'] = $item['author-id'];
414 $actor = APContact::getByURL($item['owner-link'], false);
415 $item['isForum'] = ($actor['type'] == 'Group');
418 $item['uri'] = $activity['id'];
420 if (empty($activity['published']) || empty($activity['updated'])) {
421 DI::logger()->notice('published or updated keys are empty for activity', ['activity' => $activity, 'callstack' => System::callstack(10)]);
424 $item['created'] = DateTimeFormat::utc($activity['published'] ?? 'now');
425 $item['edited'] = DateTimeFormat::utc($activity['updated'] ?? 'now');
426 $guid = $activity['sc:identifier'] ?: self::getGUIDByURL($item['uri']);
427 $item['guid'] = $activity['diaspora:guid'] ?: $guid;
429 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
430 if (empty($item['uri-id'])) {
431 Logger::warning('Unable to get a uri-id for an item uri', ['uri' => $item['uri'], 'guid' => $item['guid']]);
435 $item = self::processContent($activity, $item);
437 Logger::info('Message was not processed');
441 $item['plink'] = $activity['alternate-url'] ?? $item['uri'];
443 self::storeAttachments($activity, $item);
444 self::storeQuestion($activity, $item);
446 // We received the post via AP, so we set the protocol of the server to AP
447 $contact = Contact::getById($item['author-id'], ['gsid']);
448 if (!empty($contact['gsid'])) {
449 GServer::setProtocol($contact['gsid'], Post\DeliveryData::ACTIVITYPUB);
452 if ($item['author-id'] != $item['owner-id']) {
453 $contact = Contact::getById($item['owner-id'], ['gsid']);
454 if (!empty($contact['gsid'])) {
455 GServer::setProtocol($contact['gsid'], Post\DeliveryData::ACTIVITYPUB);
463 * Check if a given activity is no longer available
469 private static function ActivityIsGone(string $url): bool
471 $curlResult = HTTPSignature::fetchRaw($url, 0);
473 if (Network::isUrlBlocked($url)) {
477 // @todo To ensure that the remote system is working correctly, we can check if the "Content-Type" contains JSON
478 return in_array($curlResult->getReturnCode(), [404]);
483 * @param array $activity
484 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
485 * @throws \ImagickException
487 public static function deleteItem(array $activity)
489 $owner = Contact::getIdForURL($activity['actor']);
491 Logger::info('Deleting item', ['object' => $activity['object_id'], 'owner' => $owner]);
492 Item::markForDeletion(['uri' => $activity['object_id'], 'owner-id' => $owner]);
493 Queue::remove($activity);
497 * Prepare the item array for an activity
499 * @param array $activity Activity array
500 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
501 * @throws \ImagickException
503 public static function addTag(array $activity)
505 if (empty($activity['object_content']) || empty($activity['object_id'])) {
509 foreach ($activity['receiver'] as $receiver) {
510 $item = Post::selectFirst(['id', 'uri-id', 'origin', 'author-link'], ['uri' => $activity['target_id'], 'uid' => $receiver]);
511 if (!DBA::isResult($item)) {
512 // We don't fetch missing content for this purpose
516 if (($item['author-link'] != $activity['actor']) && !$item['origin']) {
517 Logger::info('Not origin, not from the author, skipping update', ['id' => $item['id'], 'author' => $item['author-link'], 'actor' => $activity['actor']]);
521 Tag::store($item['uri-id'], Tag::HASHTAG, $activity['object_content'], $activity['object_id']);
522 Logger::info('Tagged item', ['id' => $item['id'], 'tag' => $activity['object_content'], 'uri' => $activity['target_id'], 'actor' => $activity['actor']]);
527 * Prepare the item array for an activity
529 * @param array $activity Activity array
530 * @param string $verb Activity verb
531 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
532 * @throws \ImagickException
534 public static function createActivity(array $activity, string $verb)
536 $activity['reply-to-id'] = $activity['object_id'];
537 $item = self::createItem($activity);
542 $item['verb'] = $verb;
543 $item['thr-parent'] = $activity['object_id'];
544 $item['gravity'] = GRAVITY_ACTIVITY;
545 unset($item['post-type']);
546 $item['object-type'] = Activity\ObjectType::NOTE;
548 if (!empty($activity['content'])) {
549 $item['body'] = HTML::toBBCode($activity['content']);
552 $item['diaspora_signed_text'] = $activity['diaspora:like'] ?? '';
554 self::postItem($activity, $item);
558 * Fetch the Uri-Id of a post for the "featured" collection
560 * @param array $activity
563 private static function getUriIdForFeaturedCollection(array $activity)
565 $actor = APContact::getByURL($activity['actor']);
570 // Refetch the account when the "featured" collection is missing.
571 // This can be removed in a future version (end of 2022 should be good).
572 if (empty($actor['featured'])) {
573 $actor = APContact::getByURL($activity['actor'], true);
579 $parent = Post::selectFirst(['uri-id'], ['uri' => $activity['object_id']]);
580 if (empty($parent['uri-id'])) {
581 if (self::fetchMissingActivity($activity['object_id'], $activity, '', Receiver::COMPLETION_AUTO)) {
582 $parent = Post::selectFirst(['uri-id'], ['uri' => $activity['object_id']]);
586 if (!empty($parent['uri-id'])) {
587 return $parent['uri-id'];
594 * Add a post to the "Featured" collection
596 * @param array $activity
598 public static function addToFeaturedCollection(array $activity)
600 $uriid = self::getUriIdForFeaturedCollection($activity);
605 Logger::debug('Add post to featured collection', ['uri-id' => $uriid]);
607 Post\Collection::add($uriid, Post\Collection::FEATURED);
608 Queue::remove($activity);
612 * Remove a post to the "Featured" collection
614 * @param array $activity
616 public static function removeFromFeaturedCollection(array $activity)
618 $uriid = self::getUriIdForFeaturedCollection($activity);
623 Logger::debug('Remove post from featured collection', ['uri-id' => $uriid]);
625 Post\Collection::remove($uriid, Post\Collection::FEATURED);
626 Queue::remove($activity);
632 * @param array $activity Activity array
635 * @return int event id
638 public static function createEvent(array $activity, array $item): int
640 $event['summary'] = HTML::toBBCode($activity['name'] ?: $activity['summary']);
641 $event['desc'] = HTML::toBBCode($activity['content']);
642 if (!empty($activity['start-time'])) {
643 $event['start'] = DateTimeFormat::utc($activity['start-time']);
645 if (!empty($activity['end-time'])) {
646 $event['finish'] = DateTimeFormat::utc($activity['end-time']);
648 $event['nofinish'] = empty($event['finish']);
649 $event['location'] = $activity['location'];
650 $event['cid'] = $item['contact-id'];
651 $event['uid'] = $item['uid'];
652 $event['uri'] = $item['uri'];
653 $event['edited'] = $item['edited'];
654 $event['private'] = $item['private'];
655 $event['guid'] = $item['guid'];
656 $event['plink'] = $item['plink'];
657 $event['network'] = $item['network'];
658 $event['protocol'] = $item['protocol'];
659 $event['direction'] = $item['direction'];
660 $event['source'] = $item['source'];
662 $ev = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
663 if (DBA::isResult($ev)) {
664 $event['id'] = $ev['id'];
667 $event_id = Event::store($event);
669 Logger::info('Event was stored', ['id' => $event_id]);
675 * Process the content
677 * @param array $activity Activity array
679 * @return array|bool Returns the item array or false if there was an unexpected occurrence
682 private static function processContent(array $activity, array $item)
684 if (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/markdown')) {
685 $item['title'] = strip_tags($activity['name']);
686 $content = Markdown::toBBCode($activity['content']);
687 } elseif (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/bbcode')) {
688 $item['title'] = $activity['name'];
689 $content = $activity['content'];
691 // By default assume "text/html"
692 $item['title'] = HTML::toBBCode($activity['name'] ?? '');
693 $content = HTML::toBBCode($activity['content'] ?? '');
696 $item['title'] = trim(BBCode::toPlaintext($item['title']));
698 if (!empty($activity['languages'])) {
699 $item['language'] = self::processLanguages($activity['languages']);
702 if (!empty($activity['emojis'])) {
703 $content = self::replaceEmojis($item['uri-id'], $content, $activity['emojis']);
706 $content = self::addMentionLinks($content, $activity['tags']);
708 if (!empty($activity['source'])) {
709 $item['body'] = $activity['source'];
710 $item['raw-body'] = $content;
711 $item['body'] = Item::improveSharedDataInBody($item);
713 $parent_uri = $item['parent-uri'] ?? $item['thr-parent'];
714 if (empty($activity['directmessage']) && ($parent_uri != $item['uri']) && ($item['gravity'] == GRAVITY_COMMENT)) {
715 $parent = Post::selectFirst(['id', 'uri-id', 'private', 'author-link', 'alias'], ['uri' => $parent_uri]);
716 if (!DBA::isResult($parent)) {
717 Logger::warning('Unknown parent item.', ['uri' => $parent_uri]);
720 if (($item['private'] == Item::PRIVATE) && ($parent['private'] != Item::PRIVATE)) {
721 Logger::warning('Item is private but the parent is not. Dropping.', ['item-uri' => $item['uri'], 'thr-parent' => $item['thr-parent']]);
725 $content = self::removeImplicitMentionsFromBody($content, $parent);
727 $item['content-warning'] = HTML::toBBCode($activity['summary'] ?? '');
728 $item['raw-body'] = $item['body'] = $content;
731 self::storeFromBody($item);
732 self::storeTags($item['uri-id'], $activity['tags']);
734 self::storeReceivers($item['uri-id'], $activity['receiver_urls'] ?? []);
736 $item['location'] = $activity['location'];
738 if (!empty($activity['latitude']) && !empty($activity['longitude'])) {
739 $item['coord'] = $activity['latitude'] . ' ' . $activity['longitude'];
742 $item['app'] = $activity['generator'];
748 * Store hashtags and mentions
752 private static function storeFromBody(array $item)
754 // Make sure to delete all existing tags (can happen when called via the update functionality)
755 DBA::delete('post-tag', ['uri-id' => $item['uri-id']]);
757 Tag::storeFromBody($item['uri-id'], $item['body'], '@!');
761 * Generate a GUID out of an URL of an ActivityPub post.
763 * @param string $url message URL
764 * @return string with GUID
766 private static function getGUIDByURL(string $url): string
768 $parsed = parse_url($url);
770 $host_hash = hash('crc32', $parsed['host']);
772 unset($parsed["scheme"]);
773 unset($parsed["host"]);
775 $path = implode("/", $parsed);
777 return $host_hash . '-'. hash('fnv164', $path) . '-'. hash('joaat', $path);
781 * Checks if an incoming message is wanted
783 * @param array $activity
785 * @return boolean Is the message wanted?
787 private static function isSolicitedMessage(array $activity, array $item): bool
789 // The checks are split to improve the support when searching why a message was accepted.
790 if (count($activity['receiver']) != 1) {
791 // The message has more than one receiver, so it is wanted.
792 Logger::debug('Message has got several receivers - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
796 if ($item['private'] == Item::PRIVATE) {
797 // We only look at public posts here. Private posts are expected to be intentionally posted to the single receiver.
798 Logger::debug('Message is private - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
802 if (!empty($activity['from-relay'])) {
803 // We check relay posts at another place. When it arrived here, the message is already checked.
804 Logger::debug('Message is a relay post that is already checked - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
808 if (in_array($activity['completion-mode'] ?? Receiver::COMPLETION_NONE, [Receiver::COMPLETION_MANUAL, Receiver::COMPLETION_ANNOUCE])) {
809 // Manual completions and completions caused by reshares are allowed without any further checks.
810 Logger::debug('Message is in completion mode - accepted', ['mode' => $activity['completion-mode'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
814 if ($item['gravity'] != GRAVITY_PARENT) {
815 // We cannot reliably check at this point if a comment or activity belongs to an accepted post or needs to be fetched
816 // This can possibly be improved in the future.
817 Logger::debug('Message is no parent - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
821 $tags = array_column(Tag::getByURIId($item['uri-id'], [Tag::HASHTAG]), 'name');
822 if (Relay::isSolicitedPost($tags, $item['body'], $item['author-id'], $item['uri'], Protocol::ACTIVITYPUB)) {
823 Logger::debug('Post is accepted because of the relay settings', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
831 * Creates an item post
833 * @param array $activity Activity data
834 * @param array $item item array
835 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
836 * @throws \ImagickException
838 public static function postItem(array $activity, array $item)
846 ksort($activity['receiver']);
848 if (!self::isSolicitedMessage($activity, $item)) {
849 DBA::delete('item-uri', ['id' => $item['uri-id']]);
853 foreach ($activity['receiver'] as $receiver) {
854 if ($receiver == -1) {
858 $item['uid'] = $receiver;
860 $type = $activity['reception_type'][$receiver] ?? Receiver::TARGET_UNKNOWN;
862 case Receiver::TARGET_TO:
863 $item['post-reason'] = Item::PR_TO;
865 case Receiver::TARGET_CC:
866 $item['post-reason'] = Item::PR_CC;
868 case Receiver::TARGET_BTO:
869 $item['post-reason'] = Item::PR_BTO;
871 case Receiver::TARGET_BCC:
872 $item['post-reason'] = Item::PR_BCC;
874 case Receiver::TARGET_FOLLOWER:
875 $item['post-reason'] = Item::PR_FOLLOWER;
877 case Receiver::TARGET_ANSWER:
878 $item['post-reason'] = Item::PR_COMMENT;
880 case Receiver::TARGET_GLOBAL:
881 $item['post-reason'] = Item::PR_GLOBAL;
884 $item['post-reason'] = Item::PR_NONE;
887 if (!empty($activity['from-relay'])) {
888 $item['post-reason'] = Item::PR_RELAY;
889 } elseif (!empty($activity['thread-completion'])) {
890 $item['post-reason'] = Item::PR_FETCHED;
893 if ($item['isForum'] ?? false) {
894 $item['contact-id'] = Contact::getIdForURL($activity['actor'], $receiver);
896 $item['contact-id'] = Contact::getIdForURL($activity['author'], $receiver);
899 if (($receiver != 0) && empty($item['contact-id'])) {
900 $item['contact-id'] = Contact::getIdForURL($activity['author']);
903 if (!empty($activity['directmessage'])) {
904 self::postMail($activity, $item);
908 if (!($item['isForum'] ?? false) && ($receiver != 0) && ($item['gravity'] == GRAVITY_PARENT) && !Contact::isSharingByURL($activity['author'], $receiver)) {
909 if ($item['post-reason'] == Item::PR_BCC) {
910 Logger::info('Top level post via BCC from a non sharer, ignoring', ['uid' => $receiver, 'contact' => $item['contact-id']]);
915 !empty($activity['thread-children-type'])
916 && in_array($activity['thread-children-type'], Receiver::ACTIVITY_TYPES)
917 && DI::pConfig()->get($receiver, 'system', 'accept_only_sharer') != Item::COMPLETION_LIKE
919 Logger::info('Top level post from thread completion from a non sharer had been initiated via an activity, ignoring',
920 ['type' => $activity['thread-children-type'], 'user' => $item['uid'], 'causer' => $item['causer-link'], 'author' => $activity['author'], 'url' => $item['uri']]);
927 if ($receiver != 0) {
928 $user = User::getById($receiver, ['account-type']);
929 if (!empty($user['account-type'])) {
930 $is_forum = ($user['account-type'] == User::ACCOUNT_TYPE_COMMUNITY);
934 if (!$is_forum && DI::pConfig()->get($receiver, 'system', 'accept_only_sharer') == Item::COMPLETION_NONE && ($receiver != 0) && ($item['gravity'] == GRAVITY_PARENT)) {
935 $skip = !Contact::isSharingByURL($activity['author'], $receiver);
937 if ($skip && (($activity['type'] == 'as:Announce') || ($item['isForum'] ?? false))) {
938 $skip = !Contact::isSharingByURL($activity['actor'], $receiver);
942 Logger::info('Skipping post', ['uid' => $receiver, 'url' => $item['uri']]);
946 Logger::info('Accepting post', ['uid' => $receiver, 'url' => $item['uri']]);
949 if (($item['gravity'] != GRAVITY_ACTIVITY) && ($activity['object_type'] == 'as:Event')) {
950 $event_id = self::createEvent($activity, $item);
952 $item = Event::getItemArrayForImportedId($event_id, $item);
955 $item_id = Item::insert($item);
957 Logger::info('Item insertion successful', ['user' => $item['uid'], 'item_id' => $item_id]);
960 Logger::notice('Item insertion aborted', ['uri' => $item['uri'], 'uid' => $item['uid']]);
961 if (Item::isTooOld($item) || !Item::isValid($item)) {
962 Queue::remove($activity);
966 if ($item['uid'] == 0) {
972 Queue::remove($activity);
973 Queue::processReplyByUri($item['uri']);
976 // Store send a follow request for every reshare - but only when the item had been stored
977 if ($stored && ($item['private'] != Item::PRIVATE) && ($item['gravity'] == GRAVITY_PARENT) && !empty($item['author-link']) && ($item['author-link'] != $item['owner-link'])) {
978 $author = APContact::getByURL($item['owner-link'], false);
979 // We send automatic follow requests for reshared messages. (We don't need though for forum posts)
980 if ($author['type'] != 'Group') {
981 Logger::info('Send follow request', ['uri' => $item['uri'], 'stored' => $stored, 'to' => $item['author-link']]);
982 ActivityPub\Transmitter::sendFollowObject($item['uri'], $item['author-link']);
988 * Store tags and mentions into the tag table
990 * @param integer $uriid
993 private static function storeTags(int $uriid, array $tags = null)
995 foreach ($tags as $tag) {
996 if (empty($tag['name']) || empty($tag['type']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
1000 $hash = substr($tag['name'], 0, 1);
1002 if ($tag['type'] == 'Mention') {
1003 if (in_array($hash, [Tag::TAG_CHARACTER[Tag::MENTION],
1004 Tag::TAG_CHARACTER[Tag::EXCLUSIVE_MENTION],
1005 Tag::TAG_CHARACTER[Tag::IMPLICIT_MENTION]])) {
1006 $tag['name'] = substr($tag['name'], 1);
1008 $type = Tag::IMPLICIT_MENTION;
1010 if (!empty($tag['href'])) {
1011 $apcontact = APContact::getByURL($tag['href']);
1012 if (!empty($apcontact['name']) || !empty($apcontact['nick'])) {
1013 $tag['name'] = $apcontact['name'] ?: $apcontact['nick'];
1016 } elseif ($tag['type'] == 'Hashtag') {
1017 if ($hash == Tag::TAG_CHARACTER[Tag::HASHTAG]) {
1018 $tag['name'] = substr($tag['name'], 1);
1020 $type = Tag::HASHTAG;
1023 if (empty($tag['name'])) {
1027 Tag::store($uriid, $type, $tag['name'], $tag['href']);
1031 public static function storeReceivers(int $uriid, array $receivers)
1033 foreach (['as:to' => Tag::TO, 'as:cc' => Tag::CC, 'as:bto' => Tag::BTO, 'as:bcc' => Tag::BCC] as $element => $type) {
1034 if (!empty($receivers[$element])) {
1035 foreach ($receivers[$element] as $receiver) {
1036 if ($receiver == ActivityPub::PUBLIC_COLLECTION) {
1037 $name = Receiver::PUBLIC_COLLECTION;
1039 $name = trim(parse_url($receiver, PHP_URL_PATH), '/');
1042 $target = Tag::getTargetType($receiver);
1043 Logger::debug('Got target type', ['type' => $target, 'url' => $receiver]);
1044 Tag::store($uriid, $type, $name, $receiver, $target);
1051 * Creates an mail post
1053 * @param array $activity Activity data
1054 * @param array $item item array
1055 * @return int|bool New mail table row id or false on error
1056 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1058 private static function postMail(array $activity, array $item)
1060 if (($item['gravity'] != GRAVITY_PARENT) && !DBA::exists('mail', ['uri' => $item['thr-parent'], 'uid' => $item['uid']])) {
1061 Logger::info('Parent not found, mail will be discarded.', ['uid' => $item['uid'], 'uri' => $item['thr-parent']]);
1065 Logger::info('Direct Message', $item);
1068 $msg['uid'] = $item['uid'];
1070 $msg['contact-id'] = $item['contact-id'];
1072 $contact = Contact::getById($item['contact-id'], ['name', 'url', 'photo']);
1073 $msg['from-name'] = $contact['name'];
1074 $msg['from-url'] = $contact['url'];
1075 $msg['from-photo'] = $contact['photo'];
1077 $msg['uri'] = $item['uri'];
1078 $msg['created'] = $item['created'];
1080 $parent = DBA::selectFirst('mail', ['parent-uri', 'title'], ['uri' => $item['thr-parent']]);
1081 if (DBA::isResult($parent)) {
1082 $msg['parent-uri'] = $parent['parent-uri'];
1083 $msg['title'] = $parent['title'];
1085 $msg['parent-uri'] = $item['thr-parent'];
1087 if (!empty($item['title'])) {
1088 $msg['title'] = $item['title'];
1089 } elseif (!empty($item['content-warning'])) {
1090 $msg['title'] = $item['content-warning'];
1092 // Trying to generate a title out of the body
1093 $title = $item['body'];
1095 while (preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $title, $matches)) {
1096 $title = $matches[3];
1099 $title = trim(BBCode::toPlaintext($title));
1101 if (strlen($title) > 20) {
1102 $title = substr($title, 0, 20) . '...';
1105 $msg['title'] = $title;
1108 $msg['body'] = $item['body'];
1110 return Mail::insert($msg);
1114 * Fetch featured posts from a contact with the given url
1116 * @param string $url
1119 public static function fetchFeaturedPosts(string $url)
1121 Logger::info('Fetch featured posts', ['contact' => $url]);
1123 $apcontact = APContact::getByURL($url);
1124 if (empty($apcontact['featured'])) {
1125 Logger::info('Contact does not have a featured collection', ['contact' => $url]);
1129 $pcid = Contact::getIdForURL($url, 0, false);
1131 Logger::info('Contact not found', ['contact' => $url]);
1135 $posts = Post\Collection::selectToArrayForContact($pcid, Post\Collection::FEATURED);
1136 if (!empty($posts)) {
1137 $old_featured = array_column($posts, 'uri-id');
1142 $featured = ActivityPub::fetchItems($apcontact['featured']);
1143 if (empty($featured)) {
1144 Logger::info('Contact does not have featured posts', ['contact' => $url]);
1146 foreach ($old_featured as $uri_id) {
1147 Post\Collection::remove($uri_id, Post\Collection::FEATURED);
1148 Logger::debug('Removed no longer featured post', ['uri-id' => $uri_id, 'contact' => $url]);
1156 foreach ($featured as $post) {
1157 if (empty($post['id'])) {
1160 $id = Item::fetchByLink($post['id']);
1162 $item = Post::selectFirst(['uri-id', 'featured'], ['id' => $id]);
1163 if (!empty($item['uri-id'])) {
1164 if (!$item['featured']) {
1165 Post\Collection::add($item['uri-id'], Post\Collection::FEATURED);
1166 Logger::debug('Added featured post', ['uri-id' => $item['uri-id'], 'contact' => $url]);
1169 Logger::debug('Post already had been featured', ['uri-id' => $item['uri-id'], 'contact' => $url]);
1173 $index = array_search($item['uri-id'], $old_featured);
1174 if (!($index === false)) {
1175 unset($old_featured[$index]);
1181 foreach ($old_featured as $uri_id) {
1182 Post\Collection::remove($uri_id, Post\Collection::FEATURED);
1183 Logger::debug('Removed no longer featured post', ['uri-id' => $uri_id, 'contact' => $url]);
1186 Logger::info('Fetched featured posts', ['new' => $new, 'old' => $old, 'contact' => $url]);
1190 * Fetches missing posts
1192 * @param string $url message URL
1193 * @param array $child activity array with the child of this message
1194 * @param string $relay_actor Relay actor
1195 * @param int $completion Completion mode, see Receiver::COMPLETION_*
1196 * @return string fetched message URL
1197 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1198 * @throws \ImagickException
1200 public static function fetchMissingActivity(string $url, array $child = [], string $relay_actor = '', int $completion = Receiver::COMPLETION_MANUAL): string
1202 if (!empty($child['receiver'])) {
1203 $uid = ActivityPub\Receiver::getFirstUserFromReceivers($child['receiver']);
1208 $object = ActivityPub::fetchContent($url, $uid);
1209 if (empty($object)) {
1210 Logger::notice('Activity was not fetchable, aborting.', ['url' => $url, 'uid' => $uid]);
1214 if (empty($object['id'])) {
1215 Logger::notice('Activity has got not id, aborting. ', ['url' => $url, 'object' => $object]);
1221 if (!empty($object['attributedTo'])) {
1222 $attributed_to = $object['attributedTo'];
1223 if (is_array($attributed_to)) {
1224 $compacted = JsonLD::compact($object);
1225 $attributed_to = JsonLD::fetchElement($compacted, 'as:attributedTo', '@id');
1227 $signer[] = $attributed_to;
1230 if (!empty($object['actor'])) {
1231 $object_actor = $object['actor'];
1232 } elseif (!empty($attributed_to)) {
1233 $object_actor = $attributed_to;
1239 $signer[] = $object_actor;
1241 if (!empty($child['author'])) {
1242 $actor = $child['author'];
1245 $actor = $object_actor;
1248 if (!empty($object['published'])) {
1249 $published = $object['published'];
1250 } elseif (!empty($child['published'])) {
1251 $published = $child['published'];
1253 $published = DateTimeFormat::utcNow();
1257 $activity['@context'] = $object['@context'] ?? ActivityPub::CONTEXT;
1258 unset($object['@context']);
1259 $activity['id'] = $object['id'];
1260 $activity['to'] = $object['to'] ?? [];
1261 $activity['cc'] = $object['cc'] ?? [];
1262 $activity['actor'] = $actor;
1263 $activity['object'] = $object;
1264 $activity['published'] = $published;
1265 $activity['type'] = 'Create';
1267 $ldactivity = JsonLD::compact($activity);
1269 $ldactivity['recursion-depth'] = !empty($child['recursion-depth']) ? $child['recursion-depth'] + 1 : 1;
1271 if (!empty($relay_actor)) {
1272 $ldactivity['thread-completion'] = $ldactivity['from-relay'] = Contact::getIdForURL($relay_actor);
1273 $ldactivity['completion-mode'] = Receiver::COMPLETION_RELAY;
1274 } elseif (!empty($child['thread-completion'])) {
1275 $ldactivity['thread-completion'] = $child['thread-completion'];
1276 $ldactivity['completion-mode'] = $child['completion-mode'] ?? Receiver::COMPLETION_NONE;
1278 $ldactivity['thread-completion'] = Contact::getIdForURL($actor);
1279 $ldactivity['completion-mode'] = $completion;
1282 if (!empty($child['type'])) {
1283 $ldactivity['thread-children-type'] = $child['type'];
1286 if (!empty($relay_actor) && !self::acceptIncomingMessage($ldactivity, $object['id'])) {
1290 ActivityPub\Receiver::processActivity($ldactivity, json_encode($activity), $uid, true, false, $signer);
1292 Logger::notice('Activity had been fetched and processed.', ['url' => $url, 'object' => $activity['id']]);
1294 return $activity['id'];
1298 * Test if incoming relay messages should be accepted
1300 * @param array $activity activity array
1301 * @param string $id object ID
1302 * @return boolean true if message is accepted
1304 private static function acceptIncomingMessage(array $activity, string $id): bool
1306 if (empty($activity['as:object'])) {
1307 Logger::info('No object field in activity - accepted', ['id' => $id]);
1311 $replyto = JsonLD::fetchElement($activity['as:object'], 'as:inReplyTo', '@id');
1312 $uriid = ItemURI::getIdByURI($replyto ?? '');
1313 if (Post::exists(['uri-id' => $uriid])) {
1314 Logger::info('Post is a reply to an existing post - accepted', ['id' => $id, 'uri-id' => $uriid, 'replyto' => $replyto]);
1318 $attributed_to = JsonLD::fetchElement($activity['as:object'], 'as:attributedTo', '@id');
1319 $authorid = Contact::getIdForURL($attributed_to);
1321 $body = HTML::toBBCode(JsonLD::fetchElement($activity['as:object'], 'as:content', '@value') ?? '');
1324 $tags = Receiver::processTags(JsonLD::fetchElementArray($activity['as:object'], 'as:tag') ?? []);
1325 if (!empty($tags)) {
1326 foreach ($tags as $tag) {
1327 if ($tag['type'] != 'Hashtag') {
1330 $messageTags[] = ltrim(mb_strtolower($tag['name']), '#');
1334 return Relay::isSolicitedPost($messageTags, $body, $authorid, $id, Protocol::ACTIVITYPUB);
1338 * perform a "follow" request
1340 * @param array $activity
1342 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1343 * @throws \ImagickException
1345 public static function followUser(array $activity)
1347 $uid = User::getIdForURL($activity['object_id']);
1352 $owner = User::getOwnerDataById($uid);
1353 if (empty($owner)) {
1357 $cid = Contact::getIdForURL($activity['actor'], $uid);
1359 self::switchContact($cid);
1360 Contact::update(['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
1364 'author-id' => Contact::getIdForURL($activity['actor']),
1365 'author-link' => $activity['actor'],
1368 // Ensure that the contact has got the right network type
1369 self::switchContact($item['author-id']);
1371 $result = Contact::addRelationship($owner, [], $item, false, $activity['content'] ?? '');
1372 if ($result === true) {
1373 ActivityPub\Transmitter::sendContactAccept($item['author-link'], $activity['id'], $owner['uid']);
1376 $cid = Contact::getIdForURL($activity['actor'], $uid);
1381 if ($result && DI::config()->get('system', 'transmit_pending_events') && ($owner['contact-type'] == Contact::TYPE_COMMUNITY)) {
1382 self::transmitPendingEvents($cid, $owner['uid']);
1385 if (empty($contact)) {
1386 Contact::update(['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
1388 Logger::notice('Follow user ' . $uid . ' from contact ' . $cid . ' with id ' . $activity['id']);
1389 Queue::remove($activity);
1393 * Transmit pending events to the new follower
1395 * @param integer $cid Contact id
1396 * @param integer $uid User id
1399 private static function transmitPendingEvents(int $cid, int $uid)
1401 $account = DBA::selectFirst('account-user-view', ['ap-inbox', 'ap-sharedinbox'], ['id' => $cid]);
1402 $inbox = $account['ap-sharedinbox'] ?: $account['ap-inbox'];
1404 $events = DBA::select('event', ['id'], ["`uid` = ? AND `start` > ? AND `type` != ?", $uid, DateTimeFormat::utcNow(), 'birthday']);
1405 while ($event = DBA::fetch($events)) {
1406 $post = Post::selectFirst(['id', 'uri-id', 'created'], ['event-id' => $event['id']]);
1410 if (DI::config()->get('system', 'bulk_delivery')) {
1411 Post\Delivery::add($post['uri-id'], $uid, $inbox, $post['created'], Delivery::POST, [$cid]);
1412 Worker::add(PRIORITY_HIGH, 'APDelivery', '', 0, $inbox, 0);
1414 Worker::add(PRIORITY_HIGH, 'APDelivery', Delivery::POST, $post['id'], $inbox, $uid, [$cid], $post['uri-id']);
1420 * Update the given profile
1422 * @param array $activity
1423 * @throws \Exception
1425 public static function updatePerson(array $activity)
1427 if (empty($activity['object_id'])) {
1431 Logger::info('Updating profile', ['object' => $activity['object_id']]);
1432 Contact::updateFromProbeByURL($activity['object_id']);
1433 Queue::remove($activity);
1437 * Delete the given profile
1439 * @param array $activity
1441 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1443 public static function deletePerson(array $activity)
1445 if (empty($activity['object_id']) || empty($activity['actor'])) {
1446 Logger::info('Empty object id or actor.');
1450 if ($activity['object_id'] != $activity['actor']) {
1451 Logger::info('Object id does not match actor.');
1455 $contacts = DBA::select('contact', ['id'], ['nurl' => Strings::normaliseLink($activity['object_id'])]);
1456 while ($contact = DBA::fetch($contacts)) {
1457 Contact::remove($contact['id']);
1459 DBA::close($contacts);
1461 Logger::info('Deleted contact', ['object' => $activity['object_id']]);
1462 Queue::remove($activity);
1466 * Blocks the user by the contact
1468 * @param array $activity
1470 * @throws \Exception
1472 public static function blockAccount(array $activity)
1474 $cid = Contact::getIdForURL($activity['actor']);
1479 $uid = User::getIdForURL($activity['object_id']);
1484 Contact\User::setIsBlocked($cid, $uid, true);
1486 Logger::info('Contact blocked user', ['contact' => $cid, 'user' => $uid]);
1487 Queue::remove($activity);
1491 * Unblocks the user by the contact
1493 * @param array $activity
1495 * @throws \Exception
1497 public static function unblockAccount(array $activity)
1499 $cid = Contact::getIdForURL($activity['actor']);
1504 $uid = User::getIdForURL($activity['object_object']);
1509 Contact\User::setIsBlocked($cid, $uid, false);
1511 Logger::info('Contact unblocked user', ['contact' => $cid, 'user' => $uid]);
1512 Queue::remove($activity);
1516 * Accept a follow request
1518 * @param array $activity
1519 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1520 * @throws \ImagickException
1522 public static function acceptFollowUser(array $activity)
1524 $uid = User::getIdForURL($activity['object_actor']);
1529 $cid = Contact::getIdForURL($activity['actor'], $uid);
1531 Logger::info('No contact found', ['actor' => $activity['actor']]);
1535 self::switchContact($cid);
1537 $fields = ['pending' => false];
1539 $contact = DBA::selectFirst('contact', ['rel'], ['id' => $cid]);
1540 if ($contact['rel'] == Contact::FOLLOWER) {
1541 $fields['rel'] = Contact::FRIEND;
1544 $condition = ['id' => $cid];
1545 Contact::update($fields, $condition);
1546 Logger::info('Accept contact request', ['contact' => $cid, 'user' => $uid]);
1547 Queue::remove($activity);
1551 * Reject a follow request
1553 * @param array $activity
1554 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1555 * @throws \ImagickException
1557 public static function rejectFollowUser(array $activity)
1559 $uid = User::getIdForURL($activity['object_actor']);
1564 $cid = Contact::getIdForURL($activity['actor'], $uid);
1566 Logger::info('No contact found', ['actor' => $activity['actor']]);
1570 self::switchContact($cid);
1572 $contact = Contact::getById($cid, ['rel']);
1573 if ($contact['rel'] == Contact::SHARING) {
1574 Contact::remove($cid);
1575 Logger::info('Rejected contact request - contact removed', ['contact' => $cid, 'user' => $uid]);
1576 } elseif ($contact['rel'] == Contact::FRIEND) {
1577 Contact::update(['rel' => Contact::FOLLOWER], ['id' => $cid]);
1579 Logger::info('Rejected contact request', ['contact' => $cid, 'user' => $uid]);
1581 Queue::remove($activity);
1585 * Undo activity like "like" or "dislike"
1587 * @param array $activity
1588 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1589 * @throws \ImagickException
1591 public static function undoActivity(array $activity)
1593 if (empty($activity['object_id'])) {
1597 if (empty($activity['object_actor'])) {
1601 $author_id = Contact::getIdForURL($activity['object_actor']);
1602 if (empty($author_id)) {
1606 Item::markForDeletion(['uri' => $activity['object_id'], 'author-id' => $author_id, 'gravity' => GRAVITY_ACTIVITY]);
1607 Queue::remove($activity);
1611 * Activity to remove a follower
1613 * @param array $activity
1614 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1615 * @throws \ImagickException
1617 public static function undoFollowUser(array $activity)
1619 $uid = User::getIdForURL($activity['object_object']);
1624 $owner = User::getOwnerDataById($uid);
1625 if (empty($owner)) {
1629 $cid = Contact::getIdForURL($activity['actor'], $uid);
1631 Logger::info('No contact found', ['actor' => $activity['actor']]);
1635 self::switchContact($cid);
1637 $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
1638 if (!DBA::isResult($contact)) {
1642 Contact::removeFollower($contact);
1643 Logger::info('Undo following request', ['contact' => $cid, 'user' => $uid]);
1644 Queue::remove($activity);
1648 * Switches a contact to AP if needed
1650 * @param integer $cid Contact ID
1652 * @throws \Exception
1654 private static function switchContact(int $cid)
1656 $contact = DBA::selectFirst('contact', ['network', 'url'], ['id' => $cid]);
1657 if (!DBA::isResult($contact) || in_array($contact['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN]) || Contact::isLocal($contact['url'])) {
1661 Logger::info('Change existing contact', ['cid' => $cid, 'previous' => $contact['network']]);
1662 Contact::updateFromProbe($cid);
1666 * Collects implicit mentions like:
1667 * - the author of the parent item
1668 * - all the mentioned conversants in the parent item
1670 * @param array $parent Item array with at least ['id', 'author-link', 'alias']
1672 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1674 private static function getImplicitMentionList(array $parent): array
1676 $parent_terms = Tag::getByURIId($parent['uri-id'], [Tag::MENTION, Tag::IMPLICIT_MENTION, Tag::EXCLUSIVE_MENTION]);
1678 $parent_author = Contact::getByURL($parent['author-link'], false, ['url', 'nurl', 'alias']);
1680 $implicit_mentions = [];
1681 if (empty($parent_author['url'])) {
1682 Logger::notice('Author public contact unknown.', ['author-link' => $parent['author-link'], 'parent-id' => $parent['id']]);
1684 $implicit_mentions[] = $parent_author['url'];
1685 $implicit_mentions[] = $parent_author['nurl'];
1686 $implicit_mentions[] = $parent_author['alias'];
1689 if (!empty($parent['alias'])) {
1690 $implicit_mentions[] = $parent['alias'];
1693 foreach ($parent_terms as $term) {
1694 $contact = Contact::getByURL($term['url'], false, ['url', 'nurl', 'alias']);
1695 if (!empty($contact['url'])) {
1696 $implicit_mentions[] = $contact['url'];
1697 $implicit_mentions[] = $contact['nurl'];
1698 $implicit_mentions[] = $contact['alias'];
1702 return $implicit_mentions;
1706 * Strips from the body prepended implicit mentions
1708 * @param string $body
1709 * @param array $parent
1712 private static function removeImplicitMentionsFromBody(string $body, array $parent): string
1714 if (DI::config()->get('system', 'disable_implicit_mentions')) {
1718 $potential_mentions = self::getImplicitMentionList($parent);
1720 $kept_mentions = [];
1722 // Extract one prepended mention at a time from the body
1723 while(preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $body, $matches)) {
1724 if (!in_array($matches[2], $potential_mentions)) {
1725 $kept_mentions[] = $matches[1];
1728 $body = $matches[3];
1731 // Re-appending the kept mentions to the body after extraction
1732 $kept_mentions[] = $body;
1734 return implode('', $kept_mentions);
1738 * Adds links to string mentions
1740 * @param string $body
1741 * @param array $tags
1744 protected static function addMentionLinks(string $body, array $tags): string
1746 // This prevents links to be added again to Pleroma-style mention links
1747 $body = self::normalizeMentionLinks($body);
1749 $body = BBCode::performWithEscapedTags($body, ['url'], function ($body) use ($tags) {
1750 foreach ($tags as $tag) {
1751 if (empty($tag['name']) || empty($tag['type']) || empty($tag['href']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
1755 $hash = substr($tag['name'], 0, 1);
1756 $name = substr($tag['name'], 1);
1757 if (!in_array($hash, Tag::TAG_CHARACTER)) {
1759 $name = $tag['name'];
1762 $body = str_replace($tag['name'], $hash . '[url=' . $tag['href'] . ']' . $name . '[/url]', $body);