3 * @copyright Copyright (C) 2010-2022, the Friendica project
5 * @license GNU AGPL version 3 or any later version
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU Affero General Public License as
9 * published by the Free Software Foundation, either version 3 of the
10 * License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU Affero General Public License for more details.
17 * You should have received a copy of the GNU Affero General Public License
18 * along with this program. If not, see <https://www.gnu.org/licenses/>.
22 namespace Friendica\Protocol\ActivityPub;
24 use Friendica\Content\Text\BBCode;
25 use Friendica\Content\Text\HTML;
26 use Friendica\Content\Text\Markdown;
27 use Friendica\Core\Cache\Enum\Duration;
28 use Friendica\Core\Logger;
29 use Friendica\Core\Protocol;
30 use Friendica\Core\System;
31 use Friendica\Core\Worker;
32 use Friendica\Database\DBA;
34 use Friendica\Model\APContact;
35 use Friendica\Model\Contact;
36 use Friendica\Model\Conversation;
37 use Friendica\Model\Event;
38 use Friendica\Model\GServer;
39 use Friendica\Model\Item;
40 use Friendica\Model\ItemURI;
41 use Friendica\Model\Mail;
42 use Friendica\Model\Tag;
43 use Friendica\Model\User;
44 use Friendica\Model\Post;
45 use Friendica\Protocol\Activity;
46 use Friendica\Protocol\ActivityPub;
47 use Friendica\Protocol\Relay;
48 use Friendica\Util\DateTimeFormat;
49 use Friendica\Util\HTTPSignature;
50 use Friendica\Util\JsonLD;
51 use Friendica\Util\Network;
52 use Friendica\Util\Strings;
53 use Friendica\Worker\Delivery;
56 * ActivityPub Processor Protocol class
60 const CACHEKEY_FETCH_ACTIVITY = 'processor:fetchMissingActivity:';
62 * Extracts the tag character (#, @, !) from mention links
67 protected static function normalizeMentionLinks(string $body): string
69 return preg_replace('%\[url=([^\[\]]*)]([#@!])(.*?)\[/url]%ism', '$2[url=$1]$3[/url]', $body);
73 * Convert the language array into a language JSON
75 * @param array $languages
76 * @return string language JSON
78 private static function processLanguages(array $languages): string
80 $codes = array_keys($languages);
82 foreach ($codes as $code) {
90 return json_encode($lang);
93 * Replaces emojis in the body
97 * @param array $emojis
99 * @return string with replaced emojis
101 private static function replaceEmojis(int $uri_id, string $body, array $emojis): string
105 array_column($emojis, 'name'),
106 array_map(function ($emoji) {
107 return '[emoji=' . $emoji['href'] . ']' . $emoji['name'] . '[/emoji]';
112 // We store the emoji here to be able to avoid storing it in the media
113 foreach ($emojis as $emoji) {
114 Post\Link::getByLink($uri_id, $emoji['href']);
120 * Store attached media files in the post-media table
123 * @param array $attachment
126 private static function storeAttachmentAsMedia(int $uriid, array $attachment)
128 if (empty($attachment['url'])) {
132 $data = ['uri-id' => $uriid];
133 $data['type'] = Post\Media::UNKNOWN;
134 $data['url'] = $attachment['url'];
135 $data['mimetype'] = $attachment['mediaType'] ?? null;
136 $data['height'] = $attachment['height'] ?? null;
137 $data['width'] = $attachment['width'] ?? null;
138 $data['size'] = $attachment['size'] ?? null;
139 $data['preview'] = $attachment['image'] ?? null;
140 $data['description'] = $attachment['name'] ?? null;
142 Post\Media::insert($data);
146 * Stire attachment data
148 * @param array $activity
151 private static function storeAttachments(array $activity, array $item)
153 if (empty($activity['attachments'])) {
157 foreach ($activity['attachments'] as $attach) {
158 self::storeAttachmentAsMedia($item['uri-id'], $attach);
163 * Store attachment data
165 * @param array $activity
168 private static function storeQuestion(array $activity, array $item)
170 if (empty($activity['question'])) {
173 $question = ['multiple' => $activity['question']['multiple']];
175 if (!empty($activity['question']['voters'])) {
176 $question['voters'] = $activity['question']['voters'];
179 if (!empty($activity['question']['end-time'])) {
180 $question['end-time'] = DateTimeFormat::utc($activity['question']['end-time']);
183 Post\Question::update($item['uri-id'], $question);
185 foreach ($activity['question']['options'] as $key => $option) {
186 $option = ['name' => $option['name'], 'replies' => $option['replies']];
187 Post\QuestionOption::update($item['uri-id'], $key, $option);
190 Logger::debug('Storing incoming question', ['type' => $activity['type'], 'uri-id' => $item['uri-id'], 'question' => $activity['question']]);
196 * @param array $activity Activity array
197 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
198 * @throws \ImagickException
200 public static function updateItem(array $activity)
202 $item = Post::selectFirst(['uri', 'uri-id', 'thr-parent', 'gravity', 'post-type'], ['uri' => $activity['id']]);
203 if (!DBA::isResult($item)) {
204 Logger::warning('No existing item, item will be created', ['uri' => $activity['id']]);
205 $item = self::createItem($activity);
210 self::postItem($activity, $item);
214 $item['changed'] = DateTimeFormat::utcNow();
215 $item['edited'] = DateTimeFormat::utc($activity['updated']);
217 $item = self::processContent($activity, $item);
219 self::storeAttachments($activity, $item);
220 self::storeQuestion($activity, $item);
226 Post\History::add($item['uri-id'], $item);
227 Item::update($item, ['uri' => $activity['id']]);
229 Queue::remove($activity);
231 if ($activity['object_type'] == 'as:Event') {
232 $posts = Post::select(['event-id', 'uid'], ["`uri` = ? AND `event-id` > ?", $activity['id'], 0]);
233 while ($post = DBA::fetch($posts)) {
234 self::updateEvent($post['event-id'], $activity);
240 * Update an existing event
242 * @param int $event_id
243 * @param array $activity
245 private static function updateEvent(int $event_id, array $activity)
247 $event = DBA::selectFirst('event', [], ['id' => $event_id]);
249 $event['edited'] = DateTimeFormat::utc($activity['updated']);
250 $event['summary'] = HTML::toBBCode($activity['name']);
251 $event['desc'] = HTML::toBBCode($activity['content']);
252 if (!empty($activity['start-time'])) {
253 $event['start'] = DateTimeFormat::utc($activity['start-time']);
255 if (!empty($activity['end-time'])) {
256 $event['finish'] = DateTimeFormat::utc($activity['end-time']);
258 $event['nofinish'] = empty($event['finish']);
259 $event['location'] = $activity['location'];
261 Logger::info('Updating event', ['uri' => $activity['id'], 'id' => $event_id]);
262 Event::store($event);
266 * Prepares data for a message
268 * @param array $activity Activity array
269 * @return array Internal item
270 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
271 * @throws \ImagickException
273 public static function createItem(array $activity): array
276 $item['verb'] = Activity::POST;
277 $item['thr-parent'] = $activity['reply-to-id'];
279 if ($activity['reply-to-id'] == $activity['id']) {
280 $item['gravity'] = GRAVITY_PARENT;
281 $item['object-type'] = Activity\ObjectType::NOTE;
283 $item['gravity'] = GRAVITY_COMMENT;
284 $item['object-type'] = Activity\ObjectType::COMMENT;
287 if (!empty($activity['context'])) {
288 $item['conversation'] = $activity['context'];
289 } elseif (!empty($activity['conversation'])) {
290 $item['conversation'] = $activity['conversation'];
293 if (!empty($item['conversation'])) {
294 $conversation = Post::selectFirstThread(['uri'], ['conversation' => $item['conversation']]);
295 if (!empty($conversation)) {
296 Logger::debug('Got conversation', ['conversation' => $item['conversation'], 'parent' => $conversation]);
297 $item['parent-uri'] = $conversation['uri'];
303 if (empty($activity['directmessage']) && ($activity['id'] != $activity['reply-to-id']) && !Post::exists(['uri' => $activity['reply-to-id']])) {
304 $recursion_depth = $activity['recursion-depth'] ?? 0;
305 Logger::notice('Parent not found. Try to refetch it.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
306 if ($recursion_depth < DI::config()->get('system', 'max_recursion_depth')) {
307 $result = self::fetchMissingActivity($activity['reply-to-id'], $activity, '', Receiver::COMPLETION_AUTO);
308 if (empty($result) && self::isActivityGone($activity['reply-to-id'])) {
309 // Recursively delete this and all depending entries
310 Queue::deleteById($activity['entry-id']);
313 $fetch_by_worker = empty($result);
315 Logger::notice('Recursion level is too high.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
316 $fetch_by_worker = true;
319 if ($fetch_by_worker && Queue::hasWorker($activity)) {
320 Logger::notice('There is already a worker task to fetch the post.', ['id' => $activity['id'], 'parent' => $activity['reply-to-id']]);
321 $fetch_by_worker = false;
322 if (!empty($conversation)) {
327 if ($fetch_by_worker) {
328 Logger::notice('Fetching is done by worker.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
329 $activity['recursion-depth'] = 0;
330 $wid = Worker::add(PRIORITY_HIGH, 'FetchMissingActivity', $activity['reply-to-id'], $activity, '', Receiver::COMPLETION_AUTO);
331 Queue::setWorkerId($activity, $wid);
332 if (!empty($conversation)) {
335 } elseif (!empty($result)) {
336 if (($item['thr-parent'] != $result) && Post::exists(['uri' => $result])) {
337 $item['thr-parent'] = $result;
342 $item['diaspora_signed_text'] = $activity['diaspora:comment'] ?? '';
344 if (empty($conversation) && empty($activity['directmessage']) && ($item['gravity'] != GRAVITY_PARENT) && !Post::exists(['uri' => $item['thr-parent']])) {
345 Logger::info('Parent not found, message will be discarded.', ['thr-parent' => $item['thr-parent']]);
349 $item['network'] = Protocol::ACTIVITYPUB;
350 $item['author-link'] = $activity['author'];
351 $item['author-id'] = Contact::getIdForURL($activity['author']);
352 $item['owner-link'] = $activity['actor'];
353 $item['owner-id'] = Contact::getIdForURL($activity['actor']);
355 if (in_array(0, $activity['receiver']) && !empty($activity['unlisted'])) {
356 $item['private'] = Item::UNLISTED;
357 } elseif (in_array(0, $activity['receiver'])) {
358 $item['private'] = Item::PUBLIC;
360 $item['private'] = Item::PRIVATE;
363 if (!empty($activity['raw'])) {
364 $item['source'] = $activity['raw'];
365 $item['protocol'] = Conversation::PARCEL_ACTIVITYPUB;
368 if (isset($activity['push'])) {
369 $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 public static function isActivityGone(string $url): bool
471 $curlResult = HTTPSignature::fetchRaw($url, 0);
473 if (Network::isUrlBlocked($url)) {
477 // @todo To ensure that the remote system is working correctly, we can check if the "Content-Type" contains JSON
478 if (in_array($curlResult->getReturnCode(), [404])) {
482 $object = json_decode($curlResult->getBody(), true);
483 if (!empty($object)) {
484 $activity = JsonLD::compact($object);
485 if (JsonLD::fetchElement($activity, '@type') == 'as:Tombstone') {
495 * @param array $activity
496 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
497 * @throws \ImagickException
499 public static function deleteItem(array $activity)
501 $owner = Contact::getIdForURL($activity['actor']);
503 Logger::info('Deleting item', ['object' => $activity['object_id'], 'owner' => $owner]);
504 Item::markForDeletion(['uri' => $activity['object_id'], 'owner-id' => $owner]);
505 Queue::remove($activity);
509 * Prepare the item array for an activity
511 * @param array $activity Activity array
512 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
513 * @throws \ImagickException
515 public static function addTag(array $activity)
517 if (empty($activity['object_content']) || empty($activity['object_id'])) {
521 foreach ($activity['receiver'] as $receiver) {
522 $item = Post::selectFirst(['id', 'uri-id', 'origin', 'author-link'], ['uri' => $activity['target_id'], 'uid' => $receiver]);
523 if (!DBA::isResult($item)) {
524 // We don't fetch missing content for this purpose
528 if (($item['author-link'] != $activity['actor']) && !$item['origin']) {
529 Logger::info('Not origin, not from the author, skipping update', ['id' => $item['id'], 'author' => $item['author-link'], 'actor' => $activity['actor']]);
533 Tag::store($item['uri-id'], Tag::HASHTAG, $activity['object_content'], $activity['object_id']);
534 Logger::info('Tagged item', ['id' => $item['id'], 'tag' => $activity['object_content'], 'uri' => $activity['target_id'], 'actor' => $activity['actor']]);
539 * Prepare the item array for an activity
541 * @param array $activity Activity array
542 * @param string $verb Activity verb
543 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
544 * @throws \ImagickException
546 public static function createActivity(array $activity, string $verb)
548 $activity['reply-to-id'] = $activity['object_id'];
549 $item = self::createItem($activity);
554 $item['verb'] = $verb;
555 $item['thr-parent'] = $activity['object_id'];
556 $item['gravity'] = GRAVITY_ACTIVITY;
557 unset($item['post-type']);
558 $item['object-type'] = Activity\ObjectType::NOTE;
560 if (!empty($activity['content'])) {
561 $item['body'] = HTML::toBBCode($activity['content']);
564 $item['diaspora_signed_text'] = $activity['diaspora:like'] ?? '';
566 self::postItem($activity, $item);
570 * Fetch the Uri-Id of a post for the "featured" collection
572 * @param array $activity
575 private static function getUriIdForFeaturedCollection(array $activity)
577 $actor = APContact::getByURL($activity['actor']);
582 // Refetch the account when the "featured" collection is missing.
583 // This can be removed in a future version (end of 2022 should be good).
584 if (empty($actor['featured'])) {
585 $actor = APContact::getByURL($activity['actor'], true);
591 $parent = Post::selectFirst(['uri-id'], ['uri' => $activity['object_id']]);
592 if (empty($parent['uri-id'])) {
593 if (self::fetchMissingActivity($activity['object_id'], $activity, '', Receiver::COMPLETION_AUTO)) {
594 $parent = Post::selectFirst(['uri-id'], ['uri' => $activity['object_id']]);
598 if (!empty($parent['uri-id'])) {
599 return $parent['uri-id'];
606 * Add a post to the "Featured" collection
608 * @param array $activity
610 public static function addToFeaturedCollection(array $activity)
612 $uriid = self::getUriIdForFeaturedCollection($activity);
617 Logger::debug('Add post to featured collection', ['uri-id' => $uriid]);
619 Post\Collection::add($uriid, Post\Collection::FEATURED);
620 Queue::remove($activity);
624 * Remove a post to the "Featured" collection
626 * @param array $activity
628 public static function removeFromFeaturedCollection(array $activity)
630 $uriid = self::getUriIdForFeaturedCollection($activity);
635 Logger::debug('Remove post from featured collection', ['uri-id' => $uriid]);
637 Post\Collection::remove($uriid, Post\Collection::FEATURED);
638 Queue::remove($activity);
644 * @param array $activity Activity array
647 * @return int event id
650 public static function createEvent(array $activity, array $item): int
652 $event['summary'] = HTML::toBBCode($activity['name'] ?: $activity['summary']);
653 $event['desc'] = HTML::toBBCode($activity['content']);
654 if (!empty($activity['start-time'])) {
655 $event['start'] = DateTimeFormat::utc($activity['start-time']);
657 if (!empty($activity['end-time'])) {
658 $event['finish'] = DateTimeFormat::utc($activity['end-time']);
660 $event['nofinish'] = empty($event['finish']);
661 $event['location'] = $activity['location'];
662 $event['cid'] = $item['contact-id'];
663 $event['uid'] = $item['uid'];
664 $event['uri'] = $item['uri'];
665 $event['edited'] = $item['edited'];
666 $event['private'] = $item['private'];
667 $event['guid'] = $item['guid'];
668 $event['plink'] = $item['plink'];
669 $event['network'] = $item['network'];
670 $event['protocol'] = $item['protocol'];
671 $event['direction'] = $item['direction'];
672 $event['source'] = $item['source'];
674 $ev = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
675 if (DBA::isResult($ev)) {
676 $event['id'] = $ev['id'];
679 $event_id = Event::store($event);
681 Logger::info('Event was stored', ['id' => $event_id]);
687 * Process the content
689 * @param array $activity Activity array
691 * @return array|bool Returns the item array or false if there was an unexpected occurrence
694 private static function processContent(array $activity, array $item)
696 if (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/markdown')) {
697 $item['title'] = strip_tags($activity['name']);
698 $content = Markdown::toBBCode($activity['content']);
699 } elseif (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/bbcode')) {
700 $item['title'] = $activity['name'];
701 $content = $activity['content'];
703 // By default assume "text/html"
704 $item['title'] = HTML::toBBCode($activity['name'] ?? '');
705 $content = HTML::toBBCode($activity['content'] ?? '');
708 $item['title'] = trim(BBCode::toPlaintext($item['title']));
710 if (!empty($activity['languages'])) {
711 $item['language'] = self::processLanguages($activity['languages']);
714 if (!empty($activity['emojis'])) {
715 $content = self::replaceEmojis($item['uri-id'], $content, $activity['emojis']);
718 $content = self::addMentionLinks($content, $activity['tags']);
720 if (!empty($activity['source'])) {
721 $item['body'] = $activity['source'];
722 $item['raw-body'] = $content;
723 $item['body'] = Item::improveSharedDataInBody($item);
725 $parent_uri = $item['parent-uri'] ?? $item['thr-parent'];
726 if (empty($activity['directmessage']) && ($parent_uri != $item['uri']) && ($item['gravity'] == GRAVITY_COMMENT)) {
727 $parent = Post::selectFirst(['id', 'uri-id', 'private', 'author-link', 'alias'], ['uri' => $parent_uri]);
728 if (!DBA::isResult($parent)) {
729 Logger::warning('Unknown parent item.', ['uri' => $parent_uri]);
732 if (($item['private'] == Item::PRIVATE) && ($parent['private'] != Item::PRIVATE)) {
733 Logger::warning('Item is private but the parent is not. Dropping.', ['item-uri' => $item['uri'], 'thr-parent' => $item['thr-parent']]);
737 $content = self::removeImplicitMentionsFromBody($content, $parent);
739 $item['content-warning'] = HTML::toBBCode($activity['summary'] ?? '');
740 $item['raw-body'] = $item['body'] = $content;
743 self::storeFromBody($item);
744 self::storeTags($item['uri-id'], $activity['tags']);
746 self::storeReceivers($item['uri-id'], $activity['receiver_urls'] ?? []);
748 $item['location'] = $activity['location'];
750 if (!empty($activity['latitude']) && !empty($activity['longitude'])) {
751 $item['coord'] = $activity['latitude'] . ' ' . $activity['longitude'];
754 $item['app'] = $activity['generator'];
760 * Store hashtags and mentions
764 private static function storeFromBody(array $item)
766 // Make sure to delete all existing tags (can happen when called via the update functionality)
767 DBA::delete('post-tag', ['uri-id' => $item['uri-id']]);
769 Tag::storeFromBody($item['uri-id'], $item['body'], '@!');
773 * Generate a GUID out of an URL of an ActivityPub post.
775 * @param string $url message URL
776 * @return string with GUID
778 private static function getGUIDByURL(string $url): string
780 $parsed = parse_url($url);
782 $host_hash = hash('crc32', $parsed['host']);
784 unset($parsed["scheme"]);
785 unset($parsed["host"]);
787 $path = implode("/", $parsed);
789 return $host_hash . '-'. hash('fnv164', $path) . '-'. hash('joaat', $path);
793 * Checks if an incoming message is wanted
795 * @param array $activity
797 * @return boolean Is the message wanted?
799 private static function isSolicitedMessage(array $activity, array $item): bool
801 // The checks are split to improve the support when searching why a message was accepted.
802 if (count($activity['receiver']) != 1) {
803 // The message has more than one receiver, so it is wanted.
804 Logger::debug('Message has got several receivers - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
808 if ($item['private'] == Item::PRIVATE) {
809 // We only look at public posts here. Private posts are expected to be intentionally posted to the single receiver.
810 Logger::debug('Message is private - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
814 if (!empty($activity['from-relay'])) {
815 // We check relay posts at another place. When it arrived here, the message is already checked.
816 Logger::debug('Message is a relay post that is already checked - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
820 if (in_array($activity['completion-mode'] ?? Receiver::COMPLETION_NONE, [Receiver::COMPLETION_MANUAL, Receiver::COMPLETION_ANNOUCE])) {
821 // Manual completions and completions caused by reshares are allowed without any further checks.
822 Logger::debug('Message is in completion mode - accepted', ['mode' => $activity['completion-mode'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
826 if ($item['gravity'] != GRAVITY_PARENT) {
827 // We cannot reliably check at this point if a comment or activity belongs to an accepted post or needs to be fetched
828 // This can possibly be improved in the future.
829 Logger::debug('Message is no parent - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
833 $tags = array_column(Tag::getByURIId($item['uri-id'], [Tag::HASHTAG]), 'name');
834 if (Relay::isSolicitedPost($tags, $item['body'], $item['author-id'], $item['uri'], Protocol::ACTIVITYPUB)) {
835 Logger::debug('Post is accepted because of the relay settings', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
843 * Creates an item post
845 * @param array $activity Activity data
846 * @param array $item item array
847 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
848 * @throws \ImagickException
850 public static function postItem(array $activity, array $item)
858 ksort($activity['receiver']);
860 if (!self::isSolicitedMessage($activity, $item)) {
861 DBA::delete('item-uri', ['id' => $item['uri-id']]);
865 foreach ($activity['receiver'] as $receiver) {
866 if ($receiver == -1) {
870 $item['uid'] = $receiver;
872 $type = $activity['reception_type'][$receiver] ?? Receiver::TARGET_UNKNOWN;
874 case Receiver::TARGET_TO:
875 $item['post-reason'] = Item::PR_TO;
877 case Receiver::TARGET_CC:
878 $item['post-reason'] = Item::PR_CC;
880 case Receiver::TARGET_BTO:
881 $item['post-reason'] = Item::PR_BTO;
883 case Receiver::TARGET_BCC:
884 $item['post-reason'] = Item::PR_BCC;
886 case Receiver::TARGET_FOLLOWER:
887 $item['post-reason'] = Item::PR_FOLLOWER;
889 case Receiver::TARGET_ANSWER:
890 $item['post-reason'] = Item::PR_COMMENT;
892 case Receiver::TARGET_GLOBAL:
893 $item['post-reason'] = Item::PR_GLOBAL;
896 $item['post-reason'] = Item::PR_NONE;
899 if (!empty($activity['from-relay'])) {
900 $item['post-reason'] = Item::PR_RELAY;
901 } elseif (!empty($activity['thread-completion'])) {
902 $item['post-reason'] = Item::PR_FETCHED;
903 } elseif (in_array($item['post-reason'], [Item::PR_GLOBAL, Item::PR_NONE]) && !empty($activity['push'])) {
904 $item['post-reason'] = Item::PR_PUSHED;
907 if ($item['isForum'] ?? false) {
908 $item['contact-id'] = Contact::getIdForURL($activity['actor'], $receiver);
910 $item['contact-id'] = Contact::getIdForURL($activity['author'], $receiver);
913 if (($receiver != 0) && empty($item['contact-id'])) {
914 $item['contact-id'] = Contact::getIdForURL($activity['author']);
917 if (!empty($activity['directmessage'])) {
918 self::postMail($activity, $item);
922 if (!($item['isForum'] ?? false) && ($receiver != 0) && ($item['gravity'] == GRAVITY_PARENT) && !Contact::isSharingByURL($activity['author'], $receiver)) {
923 if ($item['post-reason'] == Item::PR_BCC) {
924 Logger::info('Top level post via BCC from a non sharer, ignoring', ['uid' => $receiver, 'contact' => $item['contact-id']]);
929 !empty($activity['thread-children-type'])
930 && in_array($activity['thread-children-type'], Receiver::ACTIVITY_TYPES)
931 && DI::pConfig()->get($receiver, 'system', 'accept_only_sharer') != Item::COMPLETION_LIKE
933 Logger::info('Top level post from thread completion from a non sharer had been initiated via an activity, ignoring',
934 ['type' => $activity['thread-children-type'], 'user' => $item['uid'], 'causer' => $item['causer-link'], 'author' => $activity['author'], 'url' => $item['uri']]);
941 if ($receiver != 0) {
942 $user = User::getById($receiver, ['account-type']);
943 if (!empty($user['account-type'])) {
944 $is_forum = ($user['account-type'] == User::ACCOUNT_TYPE_COMMUNITY);
948 if (!$is_forum && DI::pConfig()->get($receiver, 'system', 'accept_only_sharer') == Item::COMPLETION_NONE && ($receiver != 0) && ($item['gravity'] == GRAVITY_PARENT)) {
949 $skip = !Contact::isSharingByURL($activity['author'], $receiver);
951 if ($skip && (($activity['type'] == 'as:Announce') || ($item['isForum'] ?? false))) {
952 $skip = !Contact::isSharingByURL($activity['actor'], $receiver);
956 Logger::info('Skipping post', ['uid' => $receiver, 'url' => $item['uri']]);
960 Logger::info('Accepting post', ['uid' => $receiver, 'url' => $item['uri']]);
963 if (($item['gravity'] != GRAVITY_ACTIVITY) && ($activity['object_type'] == 'as:Event')) {
964 $event_id = self::createEvent($activity, $item);
966 $item = Event::getItemArrayForImportedId($event_id, $item);
969 $item_id = Item::insert($item);
971 Logger::info('Item insertion successful', ['user' => $item['uid'], 'item_id' => $item_id]);
974 Logger::notice('Item insertion aborted', ['uri' => $item['uri'], 'uid' => $item['uid']]);
975 if (Item::isTooOld($item) || !Item::isValid($item)) {
976 Queue::remove($activity);
980 if ($item['uid'] == 0) {
986 Queue::remove($activity);
988 if (Queue::hasChildren($item['uri'])) {
989 Worker::add(PRIORITY_HIGH, 'ProcessReplyByUri', $item['uri']);
993 // Store send a follow request for every reshare - but only when the item had been stored
994 if ($stored && ($item['private'] != Item::PRIVATE) && ($item['gravity'] == GRAVITY_PARENT) && !empty($item['author-link']) && ($item['author-link'] != $item['owner-link'])) {
995 $author = APContact::getByURL($item['owner-link'], false);
996 // We send automatic follow requests for reshared messages. (We don't need though for forum posts)
997 if ($author['type'] != 'Group') {
998 Logger::info('Send follow request', ['uri' => $item['uri'], 'stored' => $stored, 'to' => $item['author-link']]);
999 ActivityPub\Transmitter::sendFollowObject($item['uri'], $item['author-link']);
1005 * Store tags and mentions into the tag table
1007 * @param integer $uriid
1008 * @param array $tags
1010 private static function storeTags(int $uriid, array $tags = null)
1012 foreach ($tags as $tag) {
1013 if (empty($tag['name']) || empty($tag['type']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
1017 $hash = substr($tag['name'], 0, 1);
1019 if ($tag['type'] == 'Mention') {
1020 if (in_array($hash, [Tag::TAG_CHARACTER[Tag::MENTION],
1021 Tag::TAG_CHARACTER[Tag::EXCLUSIVE_MENTION],
1022 Tag::TAG_CHARACTER[Tag::IMPLICIT_MENTION]])) {
1023 $tag['name'] = substr($tag['name'], 1);
1025 $type = Tag::IMPLICIT_MENTION;
1027 if (!empty($tag['href'])) {
1028 $apcontact = APContact::getByURL($tag['href']);
1029 if (!empty($apcontact['name']) || !empty($apcontact['nick'])) {
1030 $tag['name'] = $apcontact['name'] ?: $apcontact['nick'];
1033 } elseif ($tag['type'] == 'Hashtag') {
1034 if ($hash == Tag::TAG_CHARACTER[Tag::HASHTAG]) {
1035 $tag['name'] = substr($tag['name'], 1);
1037 $type = Tag::HASHTAG;
1040 if (empty($tag['name'])) {
1044 Tag::store($uriid, $type, $tag['name'], $tag['href']);
1048 public static function storeReceivers(int $uriid, array $receivers)
1050 foreach (['as:to' => Tag::TO, 'as:cc' => Tag::CC, 'as:bto' => Tag::BTO, 'as:bcc' => Tag::BCC] as $element => $type) {
1051 if (!empty($receivers[$element])) {
1052 foreach ($receivers[$element] as $receiver) {
1053 if ($receiver == ActivityPub::PUBLIC_COLLECTION) {
1054 $name = Receiver::PUBLIC_COLLECTION;
1056 $name = trim(parse_url($receiver, PHP_URL_PATH), '/');
1059 $target = Tag::getTargetType($receiver);
1060 Logger::debug('Got target type', ['type' => $target, 'url' => $receiver]);
1061 Tag::store($uriid, $type, $name, $receiver, $target);
1068 * Creates an mail post
1070 * @param array $activity Activity data
1071 * @param array $item item array
1072 * @return int|bool New mail table row id or false on error
1073 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1075 private static function postMail(array $activity, array $item)
1077 if (($item['gravity'] != GRAVITY_PARENT) && !DBA::exists('mail', ['uri' => $item['thr-parent'], 'uid' => $item['uid']])) {
1078 Logger::info('Parent not found, mail will be discarded.', ['uid' => $item['uid'], 'uri' => $item['thr-parent']]);
1082 Logger::info('Direct Message', $item);
1085 $msg['uid'] = $item['uid'];
1087 $msg['contact-id'] = $item['contact-id'];
1089 $contact = Contact::getById($item['contact-id'], ['name', 'url', 'photo']);
1090 $msg['from-name'] = $contact['name'];
1091 $msg['from-url'] = $contact['url'];
1092 $msg['from-photo'] = $contact['photo'];
1094 $msg['uri'] = $item['uri'];
1095 $msg['created'] = $item['created'];
1097 $parent = DBA::selectFirst('mail', ['parent-uri', 'title'], ['uri' => $item['thr-parent']]);
1098 if (DBA::isResult($parent)) {
1099 $msg['parent-uri'] = $parent['parent-uri'];
1100 $msg['title'] = $parent['title'];
1102 $msg['parent-uri'] = $item['thr-parent'];
1104 if (!empty($item['title'])) {
1105 $msg['title'] = $item['title'];
1106 } elseif (!empty($item['content-warning'])) {
1107 $msg['title'] = $item['content-warning'];
1109 // Trying to generate a title out of the body
1110 $title = $item['body'];
1112 while (preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $title, $matches)) {
1113 $title = $matches[3];
1116 $title = trim(BBCode::toPlaintext($title));
1118 if (strlen($title) > 20) {
1119 $title = substr($title, 0, 20) . '...';
1122 $msg['title'] = $title;
1125 $msg['body'] = $item['body'];
1127 return Mail::insert($msg);
1131 * Fetch featured posts from a contact with the given url
1133 * @param string $url
1136 public static function fetchFeaturedPosts(string $url)
1138 Logger::info('Fetch featured posts', ['contact' => $url]);
1140 $apcontact = APContact::getByURL($url);
1141 if (empty($apcontact['featured'])) {
1142 Logger::info('Contact does not have a featured collection', ['contact' => $url]);
1146 $pcid = Contact::getIdForURL($url, 0, false);
1148 Logger::info('Contact not found', ['contact' => $url]);
1152 $posts = Post\Collection::selectToArrayForContact($pcid, Post\Collection::FEATURED);
1153 if (!empty($posts)) {
1154 $old_featured = array_column($posts, 'uri-id');
1159 $featured = ActivityPub::fetchItems($apcontact['featured']);
1160 if (empty($featured)) {
1161 Logger::info('Contact does not have featured posts', ['contact' => $url]);
1163 foreach ($old_featured as $uri_id) {
1164 Post\Collection::remove($uri_id, Post\Collection::FEATURED);
1165 Logger::debug('Removed no longer featured post', ['uri-id' => $uri_id, 'contact' => $url]);
1173 foreach ($featured as $post) {
1174 if (empty($post['id'])) {
1177 $id = Item::fetchByLink($post['id']);
1179 $item = Post::selectFirst(['uri-id', 'featured'], ['id' => $id]);
1180 if (!empty($item['uri-id'])) {
1181 if (!$item['featured']) {
1182 Post\Collection::add($item['uri-id'], Post\Collection::FEATURED);
1183 Logger::debug('Added featured post', ['uri-id' => $item['uri-id'], 'contact' => $url]);
1186 Logger::debug('Post already had been featured', ['uri-id' => $item['uri-id'], 'contact' => $url]);
1190 $index = array_search($item['uri-id'], $old_featured);
1191 if (!($index === false)) {
1192 unset($old_featured[$index]);
1198 foreach ($old_featured as $uri_id) {
1199 Post\Collection::remove($uri_id, Post\Collection::FEATURED);
1200 Logger::debug('Removed no longer featured post', ['uri-id' => $uri_id, 'contact' => $url]);
1203 Logger::info('Fetched featured posts', ['new' => $new, 'old' => $old, 'contact' => $url]);
1206 public static function fetchCachedActivity(string $url, int $uid): array
1208 $cachekey = self::CACHEKEY_FETCH_ACTIVITY . $uid . ':' . $url;
1209 $object = DI::cache()->get($cachekey);
1211 if (!is_null($object)) {
1212 if (!empty($object)) {
1213 Logger::debug('Fetch from cache', ['url' => $url, 'uid' => $uid]);
1215 Logger::debug('Fetch from negative cache', ['url' => $url, 'uid' => $uid]);
1220 $object = ActivityPub::fetchContent($url, $uid);
1221 if (empty($object)) {
1222 Logger::notice('Activity was not fetchable, aborting.', ['url' => $url, 'uid' => $uid]);
1223 // We perform negative caching.
1224 DI::cache()->set($cachekey, [], Duration::FIVE_MINUTES);
1228 if (empty($object['id'])) {
1229 Logger::notice('Activity has got not id, aborting. ', ['url' => $url, 'object' => $object]);
1232 DI::cache()->set($cachekey, $object, Duration::FIVE_MINUTES);
1234 Logger::debug('Activity was fetched successfully', ['url' => $url, 'uid' => $uid]);
1240 * Fetches missing posts
1242 * @param string $url message URL
1243 * @param array $child activity array with the child of this message
1244 * @param string $relay_actor Relay actor
1245 * @param int $completion Completion mode, see Receiver::COMPLETION_*
1246 * @return string fetched message URL
1247 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1248 * @throws \ImagickException
1250 public static function fetchMissingActivity(string $url, array $child = [], string $relay_actor = '', int $completion = Receiver::COMPLETION_MANUAL): string
1252 if (!empty($child['receiver'])) {
1253 $uid = ActivityPub\Receiver::getFirstUserFromReceivers($child['receiver']);
1258 $object = self::fetchCachedActivity($url, $uid);
1259 if (empty($object)) {
1265 if (!empty($object['attributedTo'])) {
1266 $attributed_to = $object['attributedTo'];
1267 if (is_array($attributed_to)) {
1268 $compacted = JsonLD::compact($object);
1269 $attributed_to = JsonLD::fetchElement($compacted, 'as:attributedTo', '@id');
1271 $signer[] = $attributed_to;
1274 if (!empty($object['actor'])) {
1275 $object_actor = $object['actor'];
1276 } elseif (!empty($attributed_to)) {
1277 $object_actor = $attributed_to;
1283 $signer[] = $object_actor;
1285 if (!empty($child['author'])) {
1286 $actor = $child['author'];
1289 $actor = $object_actor;
1292 if (!empty($object['published'])) {
1293 $published = $object['published'];
1294 } elseif (!empty($child['published'])) {
1295 $published = $child['published'];
1297 $published = DateTimeFormat::utcNow();
1301 $activity['@context'] = $object['@context'] ?? ActivityPub::CONTEXT;
1302 unset($object['@context']);
1303 $activity['id'] = $object['id'];
1304 $activity['to'] = $object['to'] ?? [];
1305 $activity['cc'] = $object['cc'] ?? [];
1306 $activity['actor'] = $actor;
1307 $activity['object'] = $object;
1308 $activity['published'] = $published;
1309 $activity['type'] = 'Create';
1311 $ldactivity = JsonLD::compact($activity);
1313 $ldactivity['recursion-depth'] = !empty($child['recursion-depth']) ? $child['recursion-depth'] + 1 : 1;
1315 if (!empty($relay_actor)) {
1316 $ldactivity['thread-completion'] = $ldactivity['from-relay'] = Contact::getIdForURL($relay_actor);
1317 $ldactivity['completion-mode'] = Receiver::COMPLETION_RELAY;
1318 } elseif (!empty($child['thread-completion'])) {
1319 $ldactivity['thread-completion'] = $child['thread-completion'];
1320 $ldactivity['completion-mode'] = $child['completion-mode'] ?? Receiver::COMPLETION_NONE;
1322 $ldactivity['thread-completion'] = Contact::getIdForURL($actor);
1323 $ldactivity['completion-mode'] = $completion;
1326 if (!empty($child['type'])) {
1327 $ldactivity['thread-children-type'] = $child['type'];
1330 if (!empty($relay_actor) && !self::acceptIncomingMessage($ldactivity, $object['id'])) {
1334 ActivityPub\Receiver::processActivity($ldactivity, json_encode($activity), $uid, true, false, $signer);
1336 Logger::notice('Activity had been fetched and processed.', ['url' => $url, 'object' => $activity['id']]);
1338 return $activity['id'];
1342 * Test if incoming relay messages should be accepted
1344 * @param array $activity activity array
1345 * @param string $id object ID
1346 * @return boolean true if message is accepted
1348 private static function acceptIncomingMessage(array $activity, string $id): bool
1350 if (empty($activity['as:object'])) {
1351 Logger::info('No object field in activity - accepted', ['id' => $id]);
1355 $replyto = JsonLD::fetchElement($activity['as:object'], 'as:inReplyTo', '@id');
1356 $uriid = ItemURI::getIdByURI($replyto ?? '');
1357 if (Post::exists(['uri-id' => $uriid])) {
1358 Logger::info('Post is a reply to an existing post - accepted', ['id' => $id, 'uri-id' => $uriid, 'replyto' => $replyto]);
1362 $attributed_to = JsonLD::fetchElement($activity['as:object'], 'as:attributedTo', '@id');
1363 $authorid = Contact::getIdForURL($attributed_to);
1365 $body = HTML::toBBCode(JsonLD::fetchElement($activity['as:object'], 'as:content', '@value') ?? '');
1368 $tags = Receiver::processTags(JsonLD::fetchElementArray($activity['as:object'], 'as:tag') ?? []);
1369 if (!empty($tags)) {
1370 foreach ($tags as $tag) {
1371 if ($tag['type'] != 'Hashtag') {
1374 $messageTags[] = ltrim(mb_strtolower($tag['name']), '#');
1378 return Relay::isSolicitedPost($messageTags, $body, $authorid, $id, Protocol::ACTIVITYPUB);
1382 * perform a "follow" request
1384 * @param array $activity
1386 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1387 * @throws \ImagickException
1389 public static function followUser(array $activity)
1391 $uid = User::getIdForURL($activity['object_id']);
1393 Queue::remove($activity);
1397 $owner = User::getOwnerDataById($uid);
1398 if (empty($owner)) {
1402 $cid = Contact::getIdForURL($activity['actor'], $uid);
1404 self::switchContact($cid);
1405 Contact::update(['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
1409 'author-id' => Contact::getIdForURL($activity['actor']),
1410 'author-link' => $activity['actor'],
1413 // Ensure that the contact has got the right network type
1414 self::switchContact($item['author-id']);
1416 $result = Contact::addRelationship($owner, [], $item, false, $activity['content'] ?? '');
1417 if ($result === true) {
1418 ActivityPub\Transmitter::sendContactAccept($item['author-link'], $activity['id'], $owner['uid']);
1421 $cid = Contact::getIdForURL($activity['actor'], $uid);
1426 if ($result && DI::config()->get('system', 'transmit_pending_events') && ($owner['contact-type'] == Contact::TYPE_COMMUNITY)) {
1427 self::transmitPendingEvents($cid, $owner['uid']);
1430 if (empty($contact)) {
1431 Contact::update(['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
1433 Logger::notice('Follow user ' . $uid . ' from contact ' . $cid . ' with id ' . $activity['id']);
1434 Queue::remove($activity);
1438 * Transmit pending events to the new follower
1440 * @param integer $cid Contact id
1441 * @param integer $uid User id
1444 private static function transmitPendingEvents(int $cid, int $uid)
1446 $account = DBA::selectFirst('account-user-view', ['ap-inbox', 'ap-sharedinbox'], ['id' => $cid]);
1447 $inbox = $account['ap-sharedinbox'] ?: $account['ap-inbox'];
1449 $events = DBA::select('event', ['id'], ["`uid` = ? AND `start` > ? AND `type` != ?", $uid, DateTimeFormat::utcNow(), 'birthday']);
1450 while ($event = DBA::fetch($events)) {
1451 $post = Post::selectFirst(['id', 'uri-id', 'created'], ['event-id' => $event['id']]);
1455 if (DI::config()->get('system', 'bulk_delivery')) {
1456 Post\Delivery::add($post['uri-id'], $uid, $inbox, $post['created'], Delivery::POST, [$cid]);
1457 Worker::add(PRIORITY_HIGH, 'APDelivery', '', 0, $inbox, 0);
1459 Worker::add(PRIORITY_HIGH, 'APDelivery', Delivery::POST, $post['id'], $inbox, $uid, [$cid], $post['uri-id']);
1465 * Update the given profile
1467 * @param array $activity
1468 * @throws \Exception
1470 public static function updatePerson(array $activity)
1472 if (empty($activity['object_id'])) {
1476 Logger::info('Updating profile', ['object' => $activity['object_id']]);
1477 Contact::updateFromProbeByURL($activity['object_id']);
1478 Queue::remove($activity);
1482 * Delete the given profile
1484 * @param array $activity
1486 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1488 public static function deletePerson(array $activity)
1490 if (empty($activity['object_id']) || empty($activity['actor'])) {
1491 Logger::info('Empty object id or actor.');
1495 if ($activity['object_id'] != $activity['actor']) {
1496 Logger::info('Object id does not match actor.');
1500 $contacts = DBA::select('contact', ['id'], ['nurl' => Strings::normaliseLink($activity['object_id'])]);
1501 while ($contact = DBA::fetch($contacts)) {
1502 Contact::remove($contact['id']);
1504 DBA::close($contacts);
1506 Logger::info('Deleted contact', ['object' => $activity['object_id']]);
1507 Queue::remove($activity);
1511 * Blocks the user by the contact
1513 * @param array $activity
1515 * @throws \Exception
1517 public static function blockAccount(array $activity)
1519 $cid = Contact::getIdForURL($activity['actor']);
1524 $uid = User::getIdForURL($activity['object_id']);
1529 Contact\User::setIsBlocked($cid, $uid, true);
1531 Logger::info('Contact blocked user', ['contact' => $cid, 'user' => $uid]);
1532 Queue::remove($activity);
1536 * Unblocks the user by the contact
1538 * @param array $activity
1540 * @throws \Exception
1542 public static function unblockAccount(array $activity)
1544 $cid = Contact::getIdForURL($activity['actor']);
1549 $uid = User::getIdForURL($activity['object_object']);
1554 Contact\User::setIsBlocked($cid, $uid, false);
1556 Logger::info('Contact unblocked user', ['contact' => $cid, 'user' => $uid]);
1557 Queue::remove($activity);
1561 * Accept a follow request
1563 * @param array $activity
1564 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1565 * @throws \ImagickException
1567 public static function acceptFollowUser(array $activity)
1569 $uid = User::getIdForURL($activity['object_actor']);
1574 $cid = Contact::getIdForURL($activity['actor'], $uid);
1576 Logger::info('No contact found', ['actor' => $activity['actor']]);
1580 self::switchContact($cid);
1582 $fields = ['pending' => false];
1584 $contact = DBA::selectFirst('contact', ['rel'], ['id' => $cid]);
1585 if ($contact['rel'] == Contact::FOLLOWER) {
1586 $fields['rel'] = Contact::FRIEND;
1589 $condition = ['id' => $cid];
1590 Contact::update($fields, $condition);
1591 Logger::info('Accept contact request', ['contact' => $cid, 'user' => $uid]);
1592 Queue::remove($activity);
1596 * Reject a follow request
1598 * @param array $activity
1599 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1600 * @throws \ImagickException
1602 public static function rejectFollowUser(array $activity)
1604 $uid = User::getIdForURL($activity['object_actor']);
1609 $cid = Contact::getIdForURL($activity['actor'], $uid);
1611 Logger::info('No contact found', ['actor' => $activity['actor']]);
1615 self::switchContact($cid);
1617 $contact = Contact::getById($cid, ['rel']);
1618 if ($contact['rel'] == Contact::SHARING) {
1619 Contact::remove($cid);
1620 Logger::info('Rejected contact request - contact removed', ['contact' => $cid, 'user' => $uid]);
1621 } elseif ($contact['rel'] == Contact::FRIEND) {
1622 Contact::update(['rel' => Contact::FOLLOWER], ['id' => $cid]);
1624 Logger::info('Rejected contact request', ['contact' => $cid, 'user' => $uid]);
1626 Queue::remove($activity);
1630 * Undo activity like "like" or "dislike"
1632 * @param array $activity
1633 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1634 * @throws \ImagickException
1636 public static function undoActivity(array $activity)
1638 if (empty($activity['object_id'])) {
1642 if (empty($activity['object_actor'])) {
1646 $author_id = Contact::getIdForURL($activity['object_actor']);
1647 if (empty($author_id)) {
1651 Item::markForDeletion(['uri' => $activity['object_id'], 'author-id' => $author_id, 'gravity' => GRAVITY_ACTIVITY]);
1652 Queue::remove($activity);
1656 * Activity to remove a follower
1658 * @param array $activity
1659 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1660 * @throws \ImagickException
1662 public static function undoFollowUser(array $activity)
1664 $uid = User::getIdForURL($activity['object_object']);
1669 $owner = User::getOwnerDataById($uid);
1670 if (empty($owner)) {
1674 $cid = Contact::getIdForURL($activity['actor'], $uid);
1676 Logger::info('No contact found', ['actor' => $activity['actor']]);
1680 self::switchContact($cid);
1682 $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
1683 if (!DBA::isResult($contact)) {
1687 Contact::removeFollower($contact);
1688 Logger::info('Undo following request', ['contact' => $cid, 'user' => $uid]);
1689 Queue::remove($activity);
1693 * Switches a contact to AP if needed
1695 * @param integer $cid Contact ID
1697 * @throws \Exception
1699 private static function switchContact(int $cid)
1701 $contact = DBA::selectFirst('contact', ['network', 'url'], ['id' => $cid]);
1702 if (!DBA::isResult($contact) || in_array($contact['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN]) || Contact::isLocal($contact['url'])) {
1706 Logger::info('Change existing contact', ['cid' => $cid, 'previous' => $contact['network']]);
1707 Contact::updateFromProbe($cid);
1711 * Collects implicit mentions like:
1712 * - the author of the parent item
1713 * - all the mentioned conversants in the parent item
1715 * @param array $parent Item array with at least ['id', 'author-link', 'alias']
1717 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1719 private static function getImplicitMentionList(array $parent): array
1721 $parent_terms = Tag::getByURIId($parent['uri-id'], [Tag::MENTION, Tag::IMPLICIT_MENTION, Tag::EXCLUSIVE_MENTION]);
1723 $parent_author = Contact::getByURL($parent['author-link'], false, ['url', 'nurl', 'alias']);
1725 $implicit_mentions = [];
1726 if (empty($parent_author['url'])) {
1727 Logger::notice('Author public contact unknown.', ['author-link' => $parent['author-link'], 'parent-id' => $parent['id']]);
1729 $implicit_mentions[] = $parent_author['url'];
1730 $implicit_mentions[] = $parent_author['nurl'];
1731 $implicit_mentions[] = $parent_author['alias'];
1734 if (!empty($parent['alias'])) {
1735 $implicit_mentions[] = $parent['alias'];
1738 foreach ($parent_terms as $term) {
1739 $contact = Contact::getByURL($term['url'], false, ['url', 'nurl', 'alias']);
1740 if (!empty($contact['url'])) {
1741 $implicit_mentions[] = $contact['url'];
1742 $implicit_mentions[] = $contact['nurl'];
1743 $implicit_mentions[] = $contact['alias'];
1747 return $implicit_mentions;
1751 * Strips from the body prepended implicit mentions
1753 * @param string $body
1754 * @param array $parent
1757 private static function removeImplicitMentionsFromBody(string $body, array $parent): string
1759 if (DI::config()->get('system', 'disable_implicit_mentions')) {
1763 $potential_mentions = self::getImplicitMentionList($parent);
1765 $kept_mentions = [];
1767 // Extract one prepended mention at a time from the body
1768 while(preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $body, $matches)) {
1769 if (!in_array($matches[2], $potential_mentions)) {
1770 $kept_mentions[] = $matches[1];
1773 $body = $matches[3];
1776 // Re-appending the kept mentions to the body after extraction
1777 $kept_mentions[] = $body;
1779 return implode('', $kept_mentions);
1783 * Adds links to string mentions
1785 * @param string $body
1786 * @param array $tags
1789 protected static function addMentionLinks(string $body, array $tags): string
1791 // This prevents links to be added again to Pleroma-style mention links
1792 $body = self::normalizeMentionLinks($body);
1794 $body = BBCode::performWithEscapedTags($body, ['url'], function ($body) use ($tags) {
1795 foreach ($tags as $tag) {
1796 if (empty($tag['name']) || empty($tag['type']) || empty($tag['href']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
1800 $hash = substr($tag['name'], 0, 1);
1801 $name = substr($tag['name'], 1);
1802 if (!in_array($hash, Tag::TAG_CHARACTER)) {
1804 $name = $tag['name'];
1807 $body = str_replace($tag['name'], $hash . '[url=' . $tag['href'] . ']' . $name . '[/url]', $body);