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::isActivityGone($activity['reply-to-id'])) {
307 // Recursively delete this and all depending entries
308 Queue::deleteById($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 $item['protocol'] = Conversation::PARCEL_ACTIVITYPUB;
365 if (isset($activity['push'])) {
366 $item['direction'] = $activity['push'] ? Conversation::PUSH : Conversation::PULL;
370 if (!empty($activity['from-relay'])) {
371 $item['direction'] = Conversation::RELAY;
374 if ($activity['object_type'] == 'as:Article') {
375 $item['post-type'] = Item::PT_ARTICLE;
376 } elseif ($activity['object_type'] == 'as:Audio') {
377 $item['post-type'] = Item::PT_AUDIO;
378 } elseif ($activity['object_type'] == 'as:Document') {
379 $item['post-type'] = Item::PT_DOCUMENT;
380 } elseif ($activity['object_type'] == 'as:Event') {
381 $item['post-type'] = Item::PT_EVENT;
382 } elseif ($activity['object_type'] == 'as:Image') {
383 $item['post-type'] = Item::PT_IMAGE;
384 } elseif ($activity['object_type'] == 'as:Page') {
385 $item['post-type'] = Item::PT_PAGE;
386 } elseif ($activity['object_type'] == 'as:Question') {
387 $item['post-type'] = Item::PT_POLL;
388 } elseif ($activity['object_type'] == 'as:Video') {
389 $item['post-type'] = Item::PT_VIDEO;
391 $item['post-type'] = Item::PT_NOTE;
394 $item['isForum'] = false;
396 if (!empty($activity['thread-completion'])) {
397 if ($activity['thread-completion'] != $item['owner-id']) {
398 $actor = Contact::getById($activity['thread-completion'], ['url']);
399 $item['causer-link'] = $actor['url'];
400 $item['causer-id'] = $activity['thread-completion'];
401 Logger::info('Use inherited actor as causer.', ['id' => $item['owner-id'], 'activity' => $activity['thread-completion'], 'owner' => $item['owner-link'], 'actor' => $actor['url']]);
403 // Store the original actor in the "causer" fields to enable the check for ignored or blocked contacts
404 $item['causer-link'] = $item['owner-link'];
405 $item['causer-id'] = $item['owner-id'];
406 Logger::info('Use actor as causer.', ['id' => $item['owner-id'], 'actor' => $item['owner-link']]);
409 $item['owner-link'] = $item['author-link'];
410 $item['owner-id'] = $item['author-id'];
412 $actor = APContact::getByURL($item['owner-link'], false);
413 $item['isForum'] = ($actor['type'] == 'Group');
416 $item['uri'] = $activity['id'];
418 if (empty($activity['published']) || empty($activity['updated'])) {
419 DI::logger()->notice('published or updated keys are empty for activity', ['activity' => $activity, 'callstack' => System::callstack(10)]);
422 $item['created'] = DateTimeFormat::utc($activity['published'] ?? 'now');
423 $item['edited'] = DateTimeFormat::utc($activity['updated'] ?? 'now');
424 $guid = $activity['sc:identifier'] ?: self::getGUIDByURL($item['uri']);
425 $item['guid'] = $activity['diaspora:guid'] ?: $guid;
427 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
428 if (empty($item['uri-id'])) {
429 Logger::warning('Unable to get a uri-id for an item uri', ['uri' => $item['uri'], 'guid' => $item['guid']]);
433 $item = self::processContent($activity, $item);
435 Logger::info('Message was not processed');
439 $item['plink'] = $activity['alternate-url'] ?? $item['uri'];
441 self::storeAttachments($activity, $item);
442 self::storeQuestion($activity, $item);
444 // We received the post via AP, so we set the protocol of the server to AP
445 $contact = Contact::getById($item['author-id'], ['gsid']);
446 if (!empty($contact['gsid'])) {
447 GServer::setProtocol($contact['gsid'], Post\DeliveryData::ACTIVITYPUB);
450 if ($item['author-id'] != $item['owner-id']) {
451 $contact = Contact::getById($item['owner-id'], ['gsid']);
452 if (!empty($contact['gsid'])) {
453 GServer::setProtocol($contact['gsid'], Post\DeliveryData::ACTIVITYPUB);
461 * Check if a given activity is no longer available
467 public static function isActivityGone(string $url): bool
469 $curlResult = HTTPSignature::fetchRaw($url, 0);
471 if (Network::isUrlBlocked($url)) {
475 // @todo To ensure that the remote system is working correctly, we can check if the "Content-Type" contains JSON
476 if (in_array($curlResult->getReturnCode(), [404])) {
480 $object = json_decode($curlResult->getBody(), true);
481 if (!empty($object)) {
482 $activity = JsonLD::compact($object);
483 if (JsonLD::fetchElement($activity, '@type') == 'as:Tombstone') {
493 * @param array $activity
494 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
495 * @throws \ImagickException
497 public static function deleteItem(array $activity)
499 $owner = Contact::getIdForURL($activity['actor']);
501 Logger::info('Deleting item', ['object' => $activity['object_id'], 'owner' => $owner]);
502 Item::markForDeletion(['uri' => $activity['object_id'], 'owner-id' => $owner]);
503 Queue::remove($activity);
507 * Prepare the item array for an activity
509 * @param array $activity Activity array
510 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
511 * @throws \ImagickException
513 public static function addTag(array $activity)
515 if (empty($activity['object_content']) || empty($activity['object_id'])) {
519 foreach ($activity['receiver'] as $receiver) {
520 $item = Post::selectFirst(['id', 'uri-id', 'origin', 'author-link'], ['uri' => $activity['target_id'], 'uid' => $receiver]);
521 if (!DBA::isResult($item)) {
522 // We don't fetch missing content for this purpose
526 if (($item['author-link'] != $activity['actor']) && !$item['origin']) {
527 Logger::info('Not origin, not from the author, skipping update', ['id' => $item['id'], 'author' => $item['author-link'], 'actor' => $activity['actor']]);
531 Tag::store($item['uri-id'], Tag::HASHTAG, $activity['object_content'], $activity['object_id']);
532 Logger::info('Tagged item', ['id' => $item['id'], 'tag' => $activity['object_content'], 'uri' => $activity['target_id'], 'actor' => $activity['actor']]);
537 * Prepare the item array for an activity
539 * @param array $activity Activity array
540 * @param string $verb Activity verb
541 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
542 * @throws \ImagickException
544 public static function createActivity(array $activity, string $verb)
546 $activity['reply-to-id'] = $activity['object_id'];
547 $item = self::createItem($activity);
552 $item['verb'] = $verb;
553 $item['thr-parent'] = $activity['object_id'];
554 $item['gravity'] = GRAVITY_ACTIVITY;
555 unset($item['post-type']);
556 $item['object-type'] = Activity\ObjectType::NOTE;
558 if (!empty($activity['content'])) {
559 $item['body'] = HTML::toBBCode($activity['content']);
562 $item['diaspora_signed_text'] = $activity['diaspora:like'] ?? '';
564 self::postItem($activity, $item);
568 * Fetch the Uri-Id of a post for the "featured" collection
570 * @param array $activity
573 private static function getUriIdForFeaturedCollection(array $activity)
575 $actor = APContact::getByURL($activity['actor']);
580 // Refetch the account when the "featured" collection is missing.
581 // This can be removed in a future version (end of 2022 should be good).
582 if (empty($actor['featured'])) {
583 $actor = APContact::getByURL($activity['actor'], true);
589 $parent = Post::selectFirst(['uri-id'], ['uri' => $activity['object_id']]);
590 if (empty($parent['uri-id'])) {
591 if (self::fetchMissingActivity($activity['object_id'], $activity, '', Receiver::COMPLETION_AUTO)) {
592 $parent = Post::selectFirst(['uri-id'], ['uri' => $activity['object_id']]);
596 if (!empty($parent['uri-id'])) {
597 return $parent['uri-id'];
604 * Add a post to the "Featured" collection
606 * @param array $activity
608 public static function addToFeaturedCollection(array $activity)
610 $uriid = self::getUriIdForFeaturedCollection($activity);
615 Logger::debug('Add post to featured collection', ['uri-id' => $uriid]);
617 Post\Collection::add($uriid, Post\Collection::FEATURED);
618 Queue::remove($activity);
622 * Remove a post to the "Featured" collection
624 * @param array $activity
626 public static function removeFromFeaturedCollection(array $activity)
628 $uriid = self::getUriIdForFeaturedCollection($activity);
633 Logger::debug('Remove post from featured collection', ['uri-id' => $uriid]);
635 Post\Collection::remove($uriid, Post\Collection::FEATURED);
636 Queue::remove($activity);
642 * @param array $activity Activity array
645 * @return int event id
648 public static function createEvent(array $activity, array $item): int
650 $event['summary'] = HTML::toBBCode($activity['name'] ?: $activity['summary']);
651 $event['desc'] = HTML::toBBCode($activity['content']);
652 if (!empty($activity['start-time'])) {
653 $event['start'] = DateTimeFormat::utc($activity['start-time']);
655 if (!empty($activity['end-time'])) {
656 $event['finish'] = DateTimeFormat::utc($activity['end-time']);
658 $event['nofinish'] = empty($event['finish']);
659 $event['location'] = $activity['location'];
660 $event['cid'] = $item['contact-id'];
661 $event['uid'] = $item['uid'];
662 $event['uri'] = $item['uri'];
663 $event['edited'] = $item['edited'];
664 $event['private'] = $item['private'];
665 $event['guid'] = $item['guid'];
666 $event['plink'] = $item['plink'];
667 $event['network'] = $item['network'];
668 $event['protocol'] = $item['protocol'];
669 $event['direction'] = $item['direction'];
670 $event['source'] = $item['source'];
672 $ev = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
673 if (DBA::isResult($ev)) {
674 $event['id'] = $ev['id'];
677 $event_id = Event::store($event);
679 Logger::info('Event was stored', ['id' => $event_id]);
685 * Process the content
687 * @param array $activity Activity array
689 * @return array|bool Returns the item array or false if there was an unexpected occurrence
692 private static function processContent(array $activity, array $item)
694 if (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/markdown')) {
695 $item['title'] = strip_tags($activity['name']);
696 $content = Markdown::toBBCode($activity['content']);
697 } elseif (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/bbcode')) {
698 $item['title'] = $activity['name'];
699 $content = $activity['content'];
701 // By default assume "text/html"
702 $item['title'] = HTML::toBBCode($activity['name'] ?? '');
703 $content = HTML::toBBCode($activity['content'] ?? '');
706 $item['title'] = trim(BBCode::toPlaintext($item['title']));
708 if (!empty($activity['languages'])) {
709 $item['language'] = self::processLanguages($activity['languages']);
712 if (!empty($activity['emojis'])) {
713 $content = self::replaceEmojis($item['uri-id'], $content, $activity['emojis']);
716 $content = self::addMentionLinks($content, $activity['tags']);
718 if (!empty($activity['source'])) {
719 $item['body'] = $activity['source'];
720 $item['raw-body'] = $content;
721 $item['body'] = Item::improveSharedDataInBody($item);
723 $parent_uri = $item['parent-uri'] ?? $item['thr-parent'];
724 if (empty($activity['directmessage']) && ($parent_uri != $item['uri']) && ($item['gravity'] == GRAVITY_COMMENT)) {
725 $parent = Post::selectFirst(['id', 'uri-id', 'private', 'author-link', 'alias'], ['uri' => $parent_uri]);
726 if (!DBA::isResult($parent)) {
727 Logger::warning('Unknown parent item.', ['uri' => $parent_uri]);
730 if (($item['private'] == Item::PRIVATE) && ($parent['private'] != Item::PRIVATE)) {
731 Logger::warning('Item is private but the parent is not. Dropping.', ['item-uri' => $item['uri'], 'thr-parent' => $item['thr-parent']]);
735 $content = self::removeImplicitMentionsFromBody($content, $parent);
737 $item['content-warning'] = HTML::toBBCode($activity['summary'] ?? '');
738 $item['raw-body'] = $item['body'] = $content;
741 self::storeFromBody($item);
742 self::storeTags($item['uri-id'], $activity['tags']);
744 self::storeReceivers($item['uri-id'], $activity['receiver_urls'] ?? []);
746 $item['location'] = $activity['location'];
748 if (!empty($activity['latitude']) && !empty($activity['longitude'])) {
749 $item['coord'] = $activity['latitude'] . ' ' . $activity['longitude'];
752 $item['app'] = $activity['generator'];
758 * Store hashtags and mentions
762 private static function storeFromBody(array $item)
764 // Make sure to delete all existing tags (can happen when called via the update functionality)
765 DBA::delete('post-tag', ['uri-id' => $item['uri-id']]);
767 Tag::storeFromBody($item['uri-id'], $item['body'], '@!');
771 * Generate a GUID out of an URL of an ActivityPub post.
773 * @param string $url message URL
774 * @return string with GUID
776 private static function getGUIDByURL(string $url): string
778 $parsed = parse_url($url);
780 $host_hash = hash('crc32', $parsed['host']);
782 unset($parsed["scheme"]);
783 unset($parsed["host"]);
785 $path = implode("/", $parsed);
787 return $host_hash . '-'. hash('fnv164', $path) . '-'. hash('joaat', $path);
791 * Checks if an incoming message is wanted
793 * @param array $activity
795 * @return boolean Is the message wanted?
797 private static function isSolicitedMessage(array $activity, array $item): bool
799 // The checks are split to improve the support when searching why a message was accepted.
800 if (count($activity['receiver']) != 1) {
801 // The message has more than one receiver, so it is wanted.
802 Logger::debug('Message has got several receivers - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
806 if ($item['private'] == Item::PRIVATE) {
807 // We only look at public posts here. Private posts are expected to be intentionally posted to the single receiver.
808 Logger::debug('Message is private - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
812 if (!empty($activity['from-relay'])) {
813 // We check relay posts at another place. When it arrived here, the message is already checked.
814 Logger::debug('Message is a relay post that is already checked - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
818 if (in_array($activity['completion-mode'] ?? Receiver::COMPLETION_NONE, [Receiver::COMPLETION_MANUAL, Receiver::COMPLETION_ANNOUCE])) {
819 // Manual completions and completions caused by reshares are allowed without any further checks.
820 Logger::debug('Message is in completion mode - accepted', ['mode' => $activity['completion-mode'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
824 if ($item['gravity'] != GRAVITY_PARENT) {
825 // We cannot reliably check at this point if a comment or activity belongs to an accepted post or needs to be fetched
826 // This can possibly be improved in the future.
827 Logger::debug('Message is no parent - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
831 $tags = array_column(Tag::getByURIId($item['uri-id'], [Tag::HASHTAG]), 'name');
832 if (Relay::isSolicitedPost($tags, $item['body'], $item['author-id'], $item['uri'], Protocol::ACTIVITYPUB)) {
833 Logger::debug('Post is accepted because of the relay settings', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
841 * Creates an item post
843 * @param array $activity Activity data
844 * @param array $item item array
845 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
846 * @throws \ImagickException
848 public static function postItem(array $activity, array $item)
856 ksort($activity['receiver']);
858 if (!self::isSolicitedMessage($activity, $item)) {
859 DBA::delete('item-uri', ['id' => $item['uri-id']]);
863 foreach ($activity['receiver'] as $receiver) {
864 if ($receiver == -1) {
868 $item['uid'] = $receiver;
870 $type = $activity['reception_type'][$receiver] ?? Receiver::TARGET_UNKNOWN;
872 case Receiver::TARGET_TO:
873 $item['post-reason'] = Item::PR_TO;
875 case Receiver::TARGET_CC:
876 $item['post-reason'] = Item::PR_CC;
878 case Receiver::TARGET_BTO:
879 $item['post-reason'] = Item::PR_BTO;
881 case Receiver::TARGET_BCC:
882 $item['post-reason'] = Item::PR_BCC;
884 case Receiver::TARGET_FOLLOWER:
885 $item['post-reason'] = Item::PR_FOLLOWER;
887 case Receiver::TARGET_ANSWER:
888 $item['post-reason'] = Item::PR_COMMENT;
890 case Receiver::TARGET_GLOBAL:
891 $item['post-reason'] = Item::PR_GLOBAL;
894 $item['post-reason'] = Item::PR_NONE;
897 if (!empty($activity['from-relay'])) {
898 $item['post-reason'] = Item::PR_RELAY;
899 } elseif (!empty($activity['thread-completion'])) {
900 $item['post-reason'] = Item::PR_FETCHED;
903 if ($item['isForum'] ?? false) {
904 $item['contact-id'] = Contact::getIdForURL($activity['actor'], $receiver);
906 $item['contact-id'] = Contact::getIdForURL($activity['author'], $receiver);
909 if (($receiver != 0) && empty($item['contact-id'])) {
910 $item['contact-id'] = Contact::getIdForURL($activity['author']);
913 if (!empty($activity['directmessage'])) {
914 self::postMail($activity, $item);
918 if (!($item['isForum'] ?? false) && ($receiver != 0) && ($item['gravity'] == GRAVITY_PARENT) && !Contact::isSharingByURL($activity['author'], $receiver)) {
919 if ($item['post-reason'] == Item::PR_BCC) {
920 Logger::info('Top level post via BCC from a non sharer, ignoring', ['uid' => $receiver, 'contact' => $item['contact-id']]);
925 !empty($activity['thread-children-type'])
926 && in_array($activity['thread-children-type'], Receiver::ACTIVITY_TYPES)
927 && DI::pConfig()->get($receiver, 'system', 'accept_only_sharer') != Item::COMPLETION_LIKE
929 Logger::info('Top level post from thread completion from a non sharer had been initiated via an activity, ignoring',
930 ['type' => $activity['thread-children-type'], 'user' => $item['uid'], 'causer' => $item['causer-link'], 'author' => $activity['author'], 'url' => $item['uri']]);
937 if ($receiver != 0) {
938 $user = User::getById($receiver, ['account-type']);
939 if (!empty($user['account-type'])) {
940 $is_forum = ($user['account-type'] == User::ACCOUNT_TYPE_COMMUNITY);
944 if (!$is_forum && DI::pConfig()->get($receiver, 'system', 'accept_only_sharer') == Item::COMPLETION_NONE && ($receiver != 0) && ($item['gravity'] == GRAVITY_PARENT)) {
945 $skip = !Contact::isSharingByURL($activity['author'], $receiver);
947 if ($skip && (($activity['type'] == 'as:Announce') || ($item['isForum'] ?? false))) {
948 $skip = !Contact::isSharingByURL($activity['actor'], $receiver);
952 Logger::info('Skipping post', ['uid' => $receiver, 'url' => $item['uri']]);
956 Logger::info('Accepting post', ['uid' => $receiver, 'url' => $item['uri']]);
959 if (($item['gravity'] != GRAVITY_ACTIVITY) && ($activity['object_type'] == 'as:Event')) {
960 $event_id = self::createEvent($activity, $item);
962 $item = Event::getItemArrayForImportedId($event_id, $item);
965 $item_id = Item::insert($item);
967 Logger::info('Item insertion successful', ['user' => $item['uid'], 'item_id' => $item_id]);
970 Logger::notice('Item insertion aborted', ['uri' => $item['uri'], 'uid' => $item['uid']]);
971 if (Item::isTooOld($item) || !Item::isValid($item)) {
972 Queue::remove($activity);
976 if ($item['uid'] == 0) {
982 Queue::remove($activity);
984 if (Queue::hasChildren($item['uri'])) {
985 //Queue::processReplyByUri($item['uri']);
986 Worker::add(PRIORITY_HIGH, 'ProcessReplyByUri', $item['uri']);
990 // Store send a follow request for every reshare - but only when the item had been stored
991 if ($stored && ($item['private'] != Item::PRIVATE) && ($item['gravity'] == GRAVITY_PARENT) && !empty($item['author-link']) && ($item['author-link'] != $item['owner-link'])) {
992 $author = APContact::getByURL($item['owner-link'], false);
993 // We send automatic follow requests for reshared messages. (We don't need though for forum posts)
994 if ($author['type'] != 'Group') {
995 Logger::info('Send follow request', ['uri' => $item['uri'], 'stored' => $stored, 'to' => $item['author-link']]);
996 ActivityPub\Transmitter::sendFollowObject($item['uri'], $item['author-link']);
1002 * Store tags and mentions into the tag table
1004 * @param integer $uriid
1005 * @param array $tags
1007 private static function storeTags(int $uriid, array $tags = null)
1009 foreach ($tags as $tag) {
1010 if (empty($tag['name']) || empty($tag['type']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
1014 $hash = substr($tag['name'], 0, 1);
1016 if ($tag['type'] == 'Mention') {
1017 if (in_array($hash, [Tag::TAG_CHARACTER[Tag::MENTION],
1018 Tag::TAG_CHARACTER[Tag::EXCLUSIVE_MENTION],
1019 Tag::TAG_CHARACTER[Tag::IMPLICIT_MENTION]])) {
1020 $tag['name'] = substr($tag['name'], 1);
1022 $type = Tag::IMPLICIT_MENTION;
1024 if (!empty($tag['href'])) {
1025 $apcontact = APContact::getByURL($tag['href']);
1026 if (!empty($apcontact['name']) || !empty($apcontact['nick'])) {
1027 $tag['name'] = $apcontact['name'] ?: $apcontact['nick'];
1030 } elseif ($tag['type'] == 'Hashtag') {
1031 if ($hash == Tag::TAG_CHARACTER[Tag::HASHTAG]) {
1032 $tag['name'] = substr($tag['name'], 1);
1034 $type = Tag::HASHTAG;
1037 if (empty($tag['name'])) {
1041 Tag::store($uriid, $type, $tag['name'], $tag['href']);
1045 public static function storeReceivers(int $uriid, array $receivers)
1047 foreach (['as:to' => Tag::TO, 'as:cc' => Tag::CC, 'as:bto' => Tag::BTO, 'as:bcc' => Tag::BCC] as $element => $type) {
1048 if (!empty($receivers[$element])) {
1049 foreach ($receivers[$element] as $receiver) {
1050 if ($receiver == ActivityPub::PUBLIC_COLLECTION) {
1051 $name = Receiver::PUBLIC_COLLECTION;
1053 $name = trim(parse_url($receiver, PHP_URL_PATH), '/');
1056 $target = Tag::getTargetType($receiver);
1057 Logger::debug('Got target type', ['type' => $target, 'url' => $receiver]);
1058 Tag::store($uriid, $type, $name, $receiver, $target);
1065 * Creates an mail post
1067 * @param array $activity Activity data
1068 * @param array $item item array
1069 * @return int|bool New mail table row id or false on error
1070 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1072 private static function postMail(array $activity, array $item)
1074 if (($item['gravity'] != GRAVITY_PARENT) && !DBA::exists('mail', ['uri' => $item['thr-parent'], 'uid' => $item['uid']])) {
1075 Logger::info('Parent not found, mail will be discarded.', ['uid' => $item['uid'], 'uri' => $item['thr-parent']]);
1079 Logger::info('Direct Message', $item);
1082 $msg['uid'] = $item['uid'];
1084 $msg['contact-id'] = $item['contact-id'];
1086 $contact = Contact::getById($item['contact-id'], ['name', 'url', 'photo']);
1087 $msg['from-name'] = $contact['name'];
1088 $msg['from-url'] = $contact['url'];
1089 $msg['from-photo'] = $contact['photo'];
1091 $msg['uri'] = $item['uri'];
1092 $msg['created'] = $item['created'];
1094 $parent = DBA::selectFirst('mail', ['parent-uri', 'title'], ['uri' => $item['thr-parent']]);
1095 if (DBA::isResult($parent)) {
1096 $msg['parent-uri'] = $parent['parent-uri'];
1097 $msg['title'] = $parent['title'];
1099 $msg['parent-uri'] = $item['thr-parent'];
1101 if (!empty($item['title'])) {
1102 $msg['title'] = $item['title'];
1103 } elseif (!empty($item['content-warning'])) {
1104 $msg['title'] = $item['content-warning'];
1106 // Trying to generate a title out of the body
1107 $title = $item['body'];
1109 while (preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $title, $matches)) {
1110 $title = $matches[3];
1113 $title = trim(BBCode::toPlaintext($title));
1115 if (strlen($title) > 20) {
1116 $title = substr($title, 0, 20) . '...';
1119 $msg['title'] = $title;
1122 $msg['body'] = $item['body'];
1124 return Mail::insert($msg);
1128 * Fetch featured posts from a contact with the given url
1130 * @param string $url
1133 public static function fetchFeaturedPosts(string $url)
1135 Logger::info('Fetch featured posts', ['contact' => $url]);
1137 $apcontact = APContact::getByURL($url);
1138 if (empty($apcontact['featured'])) {
1139 Logger::info('Contact does not have a featured collection', ['contact' => $url]);
1143 $pcid = Contact::getIdForURL($url, 0, false);
1145 Logger::info('Contact not found', ['contact' => $url]);
1149 $posts = Post\Collection::selectToArrayForContact($pcid, Post\Collection::FEATURED);
1150 if (!empty($posts)) {
1151 $old_featured = array_column($posts, 'uri-id');
1156 $featured = ActivityPub::fetchItems($apcontact['featured']);
1157 if (empty($featured)) {
1158 Logger::info('Contact does not have featured posts', ['contact' => $url]);
1160 foreach ($old_featured as $uri_id) {
1161 Post\Collection::remove($uri_id, Post\Collection::FEATURED);
1162 Logger::debug('Removed no longer featured post', ['uri-id' => $uri_id, 'contact' => $url]);
1170 foreach ($featured as $post) {
1171 if (empty($post['id'])) {
1174 $id = Item::fetchByLink($post['id']);
1176 $item = Post::selectFirst(['uri-id', 'featured'], ['id' => $id]);
1177 if (!empty($item['uri-id'])) {
1178 if (!$item['featured']) {
1179 Post\Collection::add($item['uri-id'], Post\Collection::FEATURED);
1180 Logger::debug('Added featured post', ['uri-id' => $item['uri-id'], 'contact' => $url]);
1183 Logger::debug('Post already had been featured', ['uri-id' => $item['uri-id'], 'contact' => $url]);
1187 $index = array_search($item['uri-id'], $old_featured);
1188 if (!($index === false)) {
1189 unset($old_featured[$index]);
1195 foreach ($old_featured as $uri_id) {
1196 Post\Collection::remove($uri_id, Post\Collection::FEATURED);
1197 Logger::debug('Removed no longer featured post', ['uri-id' => $uri_id, 'contact' => $url]);
1200 Logger::info('Fetched featured posts', ['new' => $new, 'old' => $old, 'contact' => $url]);
1204 * Fetches missing posts
1206 * @param string $url message URL
1207 * @param array $child activity array with the child of this message
1208 * @param string $relay_actor Relay actor
1209 * @param int $completion Completion mode, see Receiver::COMPLETION_*
1210 * @return string fetched message URL
1211 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1212 * @throws \ImagickException
1214 public static function fetchMissingActivity(string $url, array $child = [], string $relay_actor = '', int $completion = Receiver::COMPLETION_MANUAL): string
1216 if (!empty($child['receiver'])) {
1217 $uid = ActivityPub\Receiver::getFirstUserFromReceivers($child['receiver']);
1222 $object = ActivityPub::fetchContent($url, $uid);
1223 if (empty($object)) {
1224 Logger::notice('Activity was not fetchable, aborting.', ['url' => $url, 'uid' => $uid]);
1228 if (empty($object['id'])) {
1229 Logger::notice('Activity has got not id, aborting. ', ['url' => $url, 'object' => $object]);
1235 if (!empty($object['attributedTo'])) {
1236 $attributed_to = $object['attributedTo'];
1237 if (is_array($attributed_to)) {
1238 $compacted = JsonLD::compact($object);
1239 $attributed_to = JsonLD::fetchElement($compacted, 'as:attributedTo', '@id');
1241 $signer[] = $attributed_to;
1244 if (!empty($object['actor'])) {
1245 $object_actor = $object['actor'];
1246 } elseif (!empty($attributed_to)) {
1247 $object_actor = $attributed_to;
1253 $signer[] = $object_actor;
1255 if (!empty($child['author'])) {
1256 $actor = $child['author'];
1259 $actor = $object_actor;
1262 if (!empty($object['published'])) {
1263 $published = $object['published'];
1264 } elseif (!empty($child['published'])) {
1265 $published = $child['published'];
1267 $published = DateTimeFormat::utcNow();
1271 $activity['@context'] = $object['@context'] ?? ActivityPub::CONTEXT;
1272 unset($object['@context']);
1273 $activity['id'] = $object['id'];
1274 $activity['to'] = $object['to'] ?? [];
1275 $activity['cc'] = $object['cc'] ?? [];
1276 $activity['actor'] = $actor;
1277 $activity['object'] = $object;
1278 $activity['published'] = $published;
1279 $activity['type'] = 'Create';
1281 $ldactivity = JsonLD::compact($activity);
1283 $ldactivity['recursion-depth'] = !empty($child['recursion-depth']) ? $child['recursion-depth'] + 1 : 1;
1285 if (!empty($relay_actor)) {
1286 $ldactivity['thread-completion'] = $ldactivity['from-relay'] = Contact::getIdForURL($relay_actor);
1287 $ldactivity['completion-mode'] = Receiver::COMPLETION_RELAY;
1288 } elseif (!empty($child['thread-completion'])) {
1289 $ldactivity['thread-completion'] = $child['thread-completion'];
1290 $ldactivity['completion-mode'] = $child['completion-mode'] ?? Receiver::COMPLETION_NONE;
1292 $ldactivity['thread-completion'] = Contact::getIdForURL($actor);
1293 $ldactivity['completion-mode'] = $completion;
1296 if (!empty($child['type'])) {
1297 $ldactivity['thread-children-type'] = $child['type'];
1300 if (!empty($relay_actor) && !self::acceptIncomingMessage($ldactivity, $object['id'])) {
1304 ActivityPub\Receiver::processActivity($ldactivity, json_encode($activity), $uid, true, false, $signer);
1306 Logger::notice('Activity had been fetched and processed.', ['url' => $url, 'object' => $activity['id']]);
1308 return $activity['id'];
1312 * Test if incoming relay messages should be accepted
1314 * @param array $activity activity array
1315 * @param string $id object ID
1316 * @return boolean true if message is accepted
1318 private static function acceptIncomingMessage(array $activity, string $id): bool
1320 if (empty($activity['as:object'])) {
1321 Logger::info('No object field in activity - accepted', ['id' => $id]);
1325 $replyto = JsonLD::fetchElement($activity['as:object'], 'as:inReplyTo', '@id');
1326 $uriid = ItemURI::getIdByURI($replyto ?? '');
1327 if (Post::exists(['uri-id' => $uriid])) {
1328 Logger::info('Post is a reply to an existing post - accepted', ['id' => $id, 'uri-id' => $uriid, 'replyto' => $replyto]);
1332 $attributed_to = JsonLD::fetchElement($activity['as:object'], 'as:attributedTo', '@id');
1333 $authorid = Contact::getIdForURL($attributed_to);
1335 $body = HTML::toBBCode(JsonLD::fetchElement($activity['as:object'], 'as:content', '@value') ?? '');
1338 $tags = Receiver::processTags(JsonLD::fetchElementArray($activity['as:object'], 'as:tag') ?? []);
1339 if (!empty($tags)) {
1340 foreach ($tags as $tag) {
1341 if ($tag['type'] != 'Hashtag') {
1344 $messageTags[] = ltrim(mb_strtolower($tag['name']), '#');
1348 return Relay::isSolicitedPost($messageTags, $body, $authorid, $id, Protocol::ACTIVITYPUB);
1352 * perform a "follow" request
1354 * @param array $activity
1356 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1357 * @throws \ImagickException
1359 public static function followUser(array $activity)
1361 $uid = User::getIdForURL($activity['object_id']);
1363 Queue::remove($activity);
1367 $owner = User::getOwnerDataById($uid);
1368 if (empty($owner)) {
1372 $cid = Contact::getIdForURL($activity['actor'], $uid);
1374 self::switchContact($cid);
1375 Contact::update(['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
1379 'author-id' => Contact::getIdForURL($activity['actor']),
1380 'author-link' => $activity['actor'],
1383 // Ensure that the contact has got the right network type
1384 self::switchContact($item['author-id']);
1386 $result = Contact::addRelationship($owner, [], $item, false, $activity['content'] ?? '');
1387 if ($result === true) {
1388 ActivityPub\Transmitter::sendContactAccept($item['author-link'], $activity['id'], $owner['uid']);
1391 $cid = Contact::getIdForURL($activity['actor'], $uid);
1396 if ($result && DI::config()->get('system', 'transmit_pending_events') && ($owner['contact-type'] == Contact::TYPE_COMMUNITY)) {
1397 self::transmitPendingEvents($cid, $owner['uid']);
1400 if (empty($contact)) {
1401 Contact::update(['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
1403 Logger::notice('Follow user ' . $uid . ' from contact ' . $cid . ' with id ' . $activity['id']);
1404 Queue::remove($activity);
1408 * Transmit pending events to the new follower
1410 * @param integer $cid Contact id
1411 * @param integer $uid User id
1414 private static function transmitPendingEvents(int $cid, int $uid)
1416 $account = DBA::selectFirst('account-user-view', ['ap-inbox', 'ap-sharedinbox'], ['id' => $cid]);
1417 $inbox = $account['ap-sharedinbox'] ?: $account['ap-inbox'];
1419 $events = DBA::select('event', ['id'], ["`uid` = ? AND `start` > ? AND `type` != ?", $uid, DateTimeFormat::utcNow(), 'birthday']);
1420 while ($event = DBA::fetch($events)) {
1421 $post = Post::selectFirst(['id', 'uri-id', 'created'], ['event-id' => $event['id']]);
1425 if (DI::config()->get('system', 'bulk_delivery')) {
1426 Post\Delivery::add($post['uri-id'], $uid, $inbox, $post['created'], Delivery::POST, [$cid]);
1427 Worker::add(PRIORITY_HIGH, 'APDelivery', '', 0, $inbox, 0);
1429 Worker::add(PRIORITY_HIGH, 'APDelivery', Delivery::POST, $post['id'], $inbox, $uid, [$cid], $post['uri-id']);
1435 * Update the given profile
1437 * @param array $activity
1438 * @throws \Exception
1440 public static function updatePerson(array $activity)
1442 if (empty($activity['object_id'])) {
1446 Logger::info('Updating profile', ['object' => $activity['object_id']]);
1447 Contact::updateFromProbeByURL($activity['object_id']);
1448 Queue::remove($activity);
1452 * Delete the given profile
1454 * @param array $activity
1456 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1458 public static function deletePerson(array $activity)
1460 if (empty($activity['object_id']) || empty($activity['actor'])) {
1461 Logger::info('Empty object id or actor.');
1465 if ($activity['object_id'] != $activity['actor']) {
1466 Logger::info('Object id does not match actor.');
1470 $contacts = DBA::select('contact', ['id'], ['nurl' => Strings::normaliseLink($activity['object_id'])]);
1471 while ($contact = DBA::fetch($contacts)) {
1472 Contact::remove($contact['id']);
1474 DBA::close($contacts);
1476 Logger::info('Deleted contact', ['object' => $activity['object_id']]);
1477 Queue::remove($activity);
1481 * Blocks the user by the contact
1483 * @param array $activity
1485 * @throws \Exception
1487 public static function blockAccount(array $activity)
1489 $cid = Contact::getIdForURL($activity['actor']);
1494 $uid = User::getIdForURL($activity['object_id']);
1499 Contact\User::setIsBlocked($cid, $uid, true);
1501 Logger::info('Contact blocked user', ['contact' => $cid, 'user' => $uid]);
1502 Queue::remove($activity);
1506 * Unblocks the user by the contact
1508 * @param array $activity
1510 * @throws \Exception
1512 public static function unblockAccount(array $activity)
1514 $cid = Contact::getIdForURL($activity['actor']);
1519 $uid = User::getIdForURL($activity['object_object']);
1524 Contact\User::setIsBlocked($cid, $uid, false);
1526 Logger::info('Contact unblocked user', ['contact' => $cid, 'user' => $uid]);
1527 Queue::remove($activity);
1531 * Accept a follow request
1533 * @param array $activity
1534 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1535 * @throws \ImagickException
1537 public static function acceptFollowUser(array $activity)
1539 $uid = User::getIdForURL($activity['object_actor']);
1544 $cid = Contact::getIdForURL($activity['actor'], $uid);
1546 Logger::info('No contact found', ['actor' => $activity['actor']]);
1550 self::switchContact($cid);
1552 $fields = ['pending' => false];
1554 $contact = DBA::selectFirst('contact', ['rel'], ['id' => $cid]);
1555 if ($contact['rel'] == Contact::FOLLOWER) {
1556 $fields['rel'] = Contact::FRIEND;
1559 $condition = ['id' => $cid];
1560 Contact::update($fields, $condition);
1561 Logger::info('Accept contact request', ['contact' => $cid, 'user' => $uid]);
1562 Queue::remove($activity);
1566 * Reject a follow request
1568 * @param array $activity
1569 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1570 * @throws \ImagickException
1572 public static function rejectFollowUser(array $activity)
1574 $uid = User::getIdForURL($activity['object_actor']);
1579 $cid = Contact::getIdForURL($activity['actor'], $uid);
1581 Logger::info('No contact found', ['actor' => $activity['actor']]);
1585 self::switchContact($cid);
1587 $contact = Contact::getById($cid, ['rel']);
1588 if ($contact['rel'] == Contact::SHARING) {
1589 Contact::remove($cid);
1590 Logger::info('Rejected contact request - contact removed', ['contact' => $cid, 'user' => $uid]);
1591 } elseif ($contact['rel'] == Contact::FRIEND) {
1592 Contact::update(['rel' => Contact::FOLLOWER], ['id' => $cid]);
1594 Logger::info('Rejected contact request', ['contact' => $cid, 'user' => $uid]);
1596 Queue::remove($activity);
1600 * Undo activity like "like" or "dislike"
1602 * @param array $activity
1603 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1604 * @throws \ImagickException
1606 public static function undoActivity(array $activity)
1608 if (empty($activity['object_id'])) {
1612 if (empty($activity['object_actor'])) {
1616 $author_id = Contact::getIdForURL($activity['object_actor']);
1617 if (empty($author_id)) {
1621 Item::markForDeletion(['uri' => $activity['object_id'], 'author-id' => $author_id, 'gravity' => GRAVITY_ACTIVITY]);
1622 Queue::remove($activity);
1626 * Activity to remove a follower
1628 * @param array $activity
1629 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1630 * @throws \ImagickException
1632 public static function undoFollowUser(array $activity)
1634 $uid = User::getIdForURL($activity['object_object']);
1639 $owner = User::getOwnerDataById($uid);
1640 if (empty($owner)) {
1644 $cid = Contact::getIdForURL($activity['actor'], $uid);
1646 Logger::info('No contact found', ['actor' => $activity['actor']]);
1650 self::switchContact($cid);
1652 $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
1653 if (!DBA::isResult($contact)) {
1657 Contact::removeFollower($contact);
1658 Logger::info('Undo following request', ['contact' => $cid, 'user' => $uid]);
1659 Queue::remove($activity);
1663 * Switches a contact to AP if needed
1665 * @param integer $cid Contact ID
1667 * @throws \Exception
1669 private static function switchContact(int $cid)
1671 $contact = DBA::selectFirst('contact', ['network', 'url'], ['id' => $cid]);
1672 if (!DBA::isResult($contact) || in_array($contact['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN]) || Contact::isLocal($contact['url'])) {
1676 Logger::info('Change existing contact', ['cid' => $cid, 'previous' => $contact['network']]);
1677 Contact::updateFromProbe($cid);
1681 * Collects implicit mentions like:
1682 * - the author of the parent item
1683 * - all the mentioned conversants in the parent item
1685 * @param array $parent Item array with at least ['id', 'author-link', 'alias']
1687 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1689 private static function getImplicitMentionList(array $parent): array
1691 $parent_terms = Tag::getByURIId($parent['uri-id'], [Tag::MENTION, Tag::IMPLICIT_MENTION, Tag::EXCLUSIVE_MENTION]);
1693 $parent_author = Contact::getByURL($parent['author-link'], false, ['url', 'nurl', 'alias']);
1695 $implicit_mentions = [];
1696 if (empty($parent_author['url'])) {
1697 Logger::notice('Author public contact unknown.', ['author-link' => $parent['author-link'], 'parent-id' => $parent['id']]);
1699 $implicit_mentions[] = $parent_author['url'];
1700 $implicit_mentions[] = $parent_author['nurl'];
1701 $implicit_mentions[] = $parent_author['alias'];
1704 if (!empty($parent['alias'])) {
1705 $implicit_mentions[] = $parent['alias'];
1708 foreach ($parent_terms as $term) {
1709 $contact = Contact::getByURL($term['url'], false, ['url', 'nurl', 'alias']);
1710 if (!empty($contact['url'])) {
1711 $implicit_mentions[] = $contact['url'];
1712 $implicit_mentions[] = $contact['nurl'];
1713 $implicit_mentions[] = $contact['alias'];
1717 return $implicit_mentions;
1721 * Strips from the body prepended implicit mentions
1723 * @param string $body
1724 * @param array $parent
1727 private static function removeImplicitMentionsFromBody(string $body, array $parent): string
1729 if (DI::config()->get('system', 'disable_implicit_mentions')) {
1733 $potential_mentions = self::getImplicitMentionList($parent);
1735 $kept_mentions = [];
1737 // Extract one prepended mention at a time from the body
1738 while(preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $body, $matches)) {
1739 if (!in_array($matches[2], $potential_mentions)) {
1740 $kept_mentions[] = $matches[1];
1743 $body = $matches[3];
1746 // Re-appending the kept mentions to the body after extraction
1747 $kept_mentions[] = $body;
1749 return implode('', $kept_mentions);
1753 * Adds links to string mentions
1755 * @param string $body
1756 * @param array $tags
1759 protected static function addMentionLinks(string $body, array $tags): string
1761 // This prevents links to be added again to Pleroma-style mention links
1762 $body = self::normalizeMentionLinks($body);
1764 $body = BBCode::performWithEscapedTags($body, ['url'], function ($body) use ($tags) {
1765 foreach ($tags as $tag) {
1766 if (empty($tag['name']) || empty($tag['type']) || empty($tag['href']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
1770 $hash = substr($tag['name'], 0, 1);
1771 $name = substr($tag['name'], 1);
1772 if (!in_array($hash, Tag::TAG_CHARACTER)) {
1774 $name = $tag['name'];
1777 $body = str_replace($tag['name'], $hash . '[url=' . $tag['href'] . ']' . $name . '[/url]', $body);