3 * @copyright Copyright (C) 2020, Friendica
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\Core\Logger;
27 use Friendica\Core\Protocol;
28 use Friendica\Database\DBA;
30 use Friendica\Model\APContact;
31 use Friendica\Model\Contact;
32 use Friendica\Model\Conversation;
33 use Friendica\Model\Event;
34 use Friendica\Model\Item;
35 use Friendica\Model\Mail;
36 use Friendica\Model\Term;
37 use Friendica\Model\User;
38 use Friendica\Protocol\Activity;
39 use Friendica\Protocol\ActivityPub;
40 use Friendica\Util\DateTimeFormat;
41 use Friendica\Util\JsonLD;
42 use Friendica\Util\Strings;
45 * ActivityPub Processor Protocol class
50 * Converts mentions from Pleroma into the Friendica format
54 * @return string converted body
56 private static function convertMentions($body)
58 $URLSearchString = "^\[\]";
59 $body = preg_replace("/\[url\=([$URLSearchString]*)\]([#@!])(.*?)\[\/url\]/ism", '$2[url=$1]$3[/url]', $body);
65 * Replaces emojis in the body
67 * @param array $emojis
70 * @return string with replaced emojis
72 private static function replaceEmojis($body, array $emojis)
74 foreach ($emojis as $emoji) {
75 $replace = '[class=emoji mastodon][img=' . $emoji['href'] . ']' . $emoji['name'] . '[/img][/class]';
76 $body = str_replace($emoji['name'], $replace, $body);
82 * Constructs a string with tags for a given tag array
85 * @param boolean $sensitive
86 * @return string with tags
88 private static function constructTagString(array $tags = null, $sensitive = false)
95 foreach ($tags as $tag) {
96 if (in_array($tag['type'] ?? '', ['Mention', 'Hashtag'])) {
97 if (!empty($tag_text)) {
101 $tag_text .= substr($tag['name'], 0, 1) . '[url=' . $tag['href'] . ']' . substr($tag['name'], 1) . '[/url]';
105 /// @todo add nsfw for $sensitive
111 * Add attachment data to the item array
113 * @param array $activity
116 * @return array array
118 private static function constructAttachList($activity, $item)
120 if (empty($activity['attachments'])) {
124 foreach ($activity['attachments'] as $attach) {
125 $filetype = strtolower(substr($attach['mediaType'], 0, strpos($attach['mediaType'], '/')));
126 if ($filetype == 'image') {
127 if (!empty($activity['source']) && strpos($activity['source'], $attach['url'])) {
131 if (empty($attach['name'])) {
132 $item['body'] .= "\n[img]" . $attach['url'] . '[/img]';
134 $item['body'] .= "\n[img=" . $attach['url'] . ']' . $attach['name'] . '[/img]';
136 } elseif ($filetype == 'audio') {
137 if (!empty($activity['source']) && strpos($activity['source'], $attach['url'])) {
141 $item['body'] .= "\n[audio]" . $attach['url'] . '[/audio]';
142 } elseif ($filetype == 'video') {
143 if (!empty($activity['source']) && strpos($activity['source'], $attach['url'])) {
147 $item['body'] .= "\n[video]" . $attach['url'] . '[/video]';
149 if (!empty($item["attach"])) {
150 $item["attach"] .= ',';
152 $item["attach"] = '';
154 if (!isset($attach['length'])) {
155 $attach['length'] = "0";
157 $item["attach"] .= '[attach]href="'.$attach['url'].'" length="'.$attach['length'].'" type="'.$attach['mediaType'].'" title="'.($attach['name'] ?? '') .'"[/attach]';
167 * @param array $activity Activity array
168 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
170 public static function updateItem($activity)
172 $item = Item::selectFirst(['uri', 'thr-parent', 'gravity'], ['uri' => $activity['id']]);
173 if (!DBA::isResult($item)) {
174 Logger::warning('Unknown item', ['uri' => $activity['id']]);
178 $item['changed'] = DateTimeFormat::utcNow();
179 $item['edited'] = DateTimeFormat::utc($activity['updated']);
181 $item = self::processContent($activity, $item);
186 Item::update($item, ['uri' => $activity['id']]);
190 * Prepares data for a message
192 * @param array $activity Activity array
193 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
194 * @throws \ImagickException
196 public static function createItem($activity)
199 $item['verb'] = Activity::POST;
200 $item['thr-parent'] = $activity['reply-to-id'];
202 if ($activity['reply-to-id'] == $activity['id']) {
203 $item['gravity'] = GRAVITY_PARENT;
204 $item['object-type'] = Activity\ObjectType::NOTE;
206 $item['gravity'] = GRAVITY_COMMENT;
207 $item['object-type'] = Activity\ObjectType::COMMENT;
209 // Ensure that the comment reaches all receivers of the referring post
210 $activity['receiver'] = self::addReceivers($activity);
213 if (empty($activity['directmessage']) && ($activity['id'] != $activity['reply-to-id']) && !Item::exists(['uri' => $activity['reply-to-id']])) {
214 Logger::notice('Parent not found. Try to refetch it.', ['parent' => $activity['reply-to-id']]);
215 self::fetchMissingActivity($activity['reply-to-id'], $activity);
218 $item['diaspora_signed_text'] = $activity['diaspora:comment'] ?? '';
220 self::postItem($activity, $item);
226 * @param array $activity
227 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
228 * @throws \ImagickException
230 public static function deleteItem($activity)
232 $owner = Contact::getIdForURL($activity['actor']);
234 Logger::log('Deleting item ' . $activity['object_id'] . ' from ' . $owner, Logger::DEBUG);
235 Item::markForDeletion(['uri' => $activity['object_id'], 'owner-id' => $owner]);
239 * Prepare the item array for an activity
241 * @param array $activity Activity array
242 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
243 * @throws \ImagickException
245 public static function addTag($activity)
247 if (empty($activity['object_content']) || empty($activity['object_id'])) {
251 foreach ($activity['receiver'] as $receiver) {
252 $item = Item::selectFirst(['id', 'tag', 'origin', 'author-link'], ['uri' => $activity['target_id'], 'uid' => $receiver]);
253 if (!DBA::isResult($item)) {
254 // We don't fetch missing content for this purpose
258 if (($item['author-link'] != $activity['actor']) && !$item['origin']) {
259 Logger::info('Not origin, not from the author, skipping update', ['id' => $item['id'], 'author' => $item['author-link'], 'actor' => $activity['actor']]);
264 // - Check if "blocktag" is set
265 // - Check if actor is a contact
267 if (!stristr($item['tag'], trim($activity['object_content']))) {
268 $tag = $item['tag'] . (strlen($item['tag']) ? ',' : '') . '#[url=' . $activity['object_id'] . ']'. $activity['object_content'] . '[/url]';
269 Item::update(['tag' => $tag], ['id' => $item['id']]);
270 Logger::info('Tagged item', ['id' => $item['id'], 'tag' => $activity['object_content'], 'uri' => $activity['target_id'], 'actor' => $activity['actor']]);
276 * Add users to the receiver list of the given public activity.
277 * This is used to ensure that the activity will be stored in every thread.
279 * @param array $activity Activity array
280 * @return array Modified receiver list
282 private static function addReceivers(array $activity)
284 if (!in_array(0, $activity['receiver'])) {
285 // Private activities will not be modified
286 return $activity['receiver'];
289 // Add all owners of the referring item to the receivers
290 $original = $receivers = $activity['receiver'];
291 $items = Item::select(['uid'], ['uri' => $activity['object_id']]);
292 while ($item = DBA::fetch($items)) {
293 $receivers['uid:' . $item['uid']] = $item['uid'];
297 if (count($original) != count($receivers)) {
298 Logger::info('Improved data', ['id' => $activity['id'], 'object' => $activity['object_id'], 'original' => $original, 'improved' => $receivers]);
305 * Prepare the item array for an activity
307 * @param array $activity Activity array
308 * @param string $verb Activity verb
309 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
310 * @throws \ImagickException
312 public static function createActivity($activity, $verb)
315 $item['verb'] = $verb;
316 $item['thr-parent'] = $activity['object_id'];
317 $item['gravity'] = GRAVITY_ACTIVITY;
318 $item['object-type'] = Activity\ObjectType::NOTE;
320 $item['diaspora_signed_text'] = $activity['diaspora:like'] ?? '';
322 $activity['receiver'] = self::addReceivers($activity);
324 self::postItem($activity, $item);
330 * @param array $activity Activity array
334 public static function createEvent($activity, $item)
336 $event['summary'] = HTML::toBBCode($activity['name']);
337 $event['desc'] = HTML::toBBCode($activity['content']);
338 $event['start'] = $activity['start-time'];
339 $event['finish'] = $activity['end-time'];
340 $event['nofinish'] = empty($event['finish']);
341 $event['location'] = $activity['location'];
342 $event['adjust'] = true;
343 $event['cid'] = $item['contact-id'];
344 $event['uid'] = $item['uid'];
345 $event['uri'] = $item['uri'];
346 $event['edited'] = $item['edited'];
347 $event['private'] = $item['private'];
348 $event['guid'] = $item['guid'];
349 $event['plink'] = $item['plink'];
351 $condition = ['uri' => $item['uri'], 'uid' => $item['uid']];
352 $ev = DBA::selectFirst('event', ['id'], $condition);
353 if (DBA::isResult($ev)) {
354 $event['id'] = $ev['id'];
357 $event_id = Event::store($event);
358 Logger::log('Event '.$event_id.' was stored', Logger::DEBUG);
362 * Process the content
364 * @param array $activity Activity array
366 * @return array|bool Returns the item array or false if there was an unexpected occurrence
369 private static function processContent($activity, $item)
371 $item['title'] = HTML::toBBCode($activity['name']);
373 if (!empty($activity['source'])) {
374 $item['body'] = $activity['source'];
376 $content = HTML::toBBCode($activity['content']);
378 if (!empty($activity['emojis'])) {
379 $content = self::replaceEmojis($content, $activity['emojis']);
382 $content = self::convertMentions($content);
384 if (empty($activity['directmessage']) && ($item['thr-parent'] != $item['uri']) && ($item['gravity'] == GRAVITY_COMMENT)) {
385 $item_private = !in_array(0, $activity['item_receiver']);
386 $parent = Item::selectFirst(['id', 'private', 'author-link', 'alias'], ['uri' => $item['thr-parent']]);
387 if (!DBA::isResult($parent)) {
388 Logger::warning('Unknown parent item.', ['uri' => $item['thr-parent']]);
391 if ($item_private && ($parent['private'] == Item::PRIVATE)) {
392 Logger::warning('Item is private but the parent is not. Dropping.', ['item-uri' => $item['uri'], 'thr-parent' => $item['thr-parent']]);
396 $potential_implicit_mentions = self::getImplicitMentionList($parent);
397 $content = self::removeImplicitMentionsFromBody($content, $potential_implicit_mentions);
398 $activity['tags'] = self::convertImplicitMentionsInTags($activity['tags'], $potential_implicit_mentions);
400 $item['content-warning'] = HTML::toBBCode($activity['summary']);
401 $item['body'] = $content;
404 $item['tag'] = self::constructTagString($activity['tags'], $activity['sensitive']);
406 $item['location'] = $activity['location'];
408 if (!empty($item['latitude']) && !empty($item['longitude'])) {
409 $item['coord'] = $item['latitude'] . ' ' . $item['longitude'];
412 $item['app'] = $activity['generator'];
418 * Generate a GUID out of an URL
420 * @param string $url message URL
421 * @return string with GUID
423 private static function getGUIDByURL(string $url)
425 $parsed = parse_url($url);
427 $host_hash = hash('crc32', $parsed['host']);
429 unset($parsed["scheme"]);
430 unset($parsed["host"]);
432 $path = implode("/", $parsed);
434 return $host_hash . '-'. hash('fnv164', $path) . '-'. hash('joaat', $path);
438 * Creates an item post
440 * @param array $activity Activity data
441 * @param array $item item array
442 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
443 * @throws \ImagickException
445 private static function postItem($activity, $item)
447 /// @todo What to do with $activity['context']?
448 if (empty($activity['directmessage']) && ($item['gravity'] != GRAVITY_PARENT) && !Item::exists(['uri' => $item['thr-parent']])) {
449 Logger::info('Parent not found, message will be discarded.', ['thr-parent' => $item['thr-parent']]);
453 $item['network'] = Protocol::ACTIVITYPUB;
454 $item['author-link'] = $activity['author'];
455 $item['author-id'] = Contact::getIdForURL($activity['author'], 0, true);
456 $item['owner-link'] = $activity['actor'];
457 $item['owner-id'] = Contact::getIdForURL($activity['actor'], 0, true);
459 if (in_array(0, $activity['receiver']) && !empty($activity['unlisted'])) {
460 $item['private'] = Item::UNLISTED;
461 } elseif (in_array(0, $activity['receiver'])) {
462 $item['private'] = Item::PUBLIC;
464 $item['private'] = Item::PRIVATE;
467 if (!empty($activity['raw'])) {
468 $item['source'] = $activity['raw'];
469 $item['protocol'] = Conversation::PARCEL_ACTIVITYPUB;
470 $item['conversation-href'] = $activity['context'] ?? '';
471 $item['conversation-uri'] = $activity['conversation'] ?? '';
473 if (isset($activity['push'])) {
474 $item['direction'] = $activity['push'] ? Conversation::PUSH : Conversation::PULL;
480 if (!empty($activity['thread-completion'])) {
481 // Store the original actor in the "causer" fields to enable the check for ignored or blocked contacts
482 $item['causer-link'] = $item['owner-link'];
483 $item['causer-id'] = $item['owner-id'];
485 Logger::info('Ignoring actor because of thread completion.', ['actor' => $item['owner-link']]);
486 $item['owner-link'] = $item['author-link'];
487 $item['owner-id'] = $item['author-id'];
489 $actor = APContact::getByURL($item['owner-link'], false);
490 $isForum = ($actor['type'] == 'Group');
493 $item['uri'] = $activity['id'];
495 $item['created'] = DateTimeFormat::utc($activity['published']);
496 $item['edited'] = DateTimeFormat::utc($activity['updated']);
497 $item['guid'] = $activity['diaspora:guid'] ?: $activity['sc:identifier'] ?: self::getGUIDByURL($item['uri']);
499 $item = self::processContent($activity, $item);
504 $item['plink'] = $activity['alternate-url'] ?? $item['uri'];
506 $item = self::constructAttachList($activity, $item);
510 foreach ($activity['receiver'] as $receiver) {
511 if ($receiver == -1) {
515 $item['uid'] = $receiver;
518 $item['contact-id'] = Contact::getIdForURL($activity['actor'], $receiver, true);
520 $item['contact-id'] = Contact::getIdForURL($activity['author'], $receiver, true);
523 if (($receiver != 0) && empty($item['contact-id'])) {
524 $item['contact-id'] = Contact::getIdForURL($activity['author'], 0, true);
527 if (!empty($activity['directmessage'])) {
528 self::postMail($activity, $item);
532 if (DI::pConfig()->get($receiver, 'system', 'accept_only_sharer', false) && ($receiver != 0) && ($item['gravity'] == GRAVITY_PARENT)) {
533 $skip = !Contact::isSharingByURL($activity['author'], $receiver);
535 if ($skip && (($activity['type'] == 'as:Announce') || $isForum)) {
536 $skip = !Contact::isSharingByURL($activity['actor'], $receiver);
540 Logger::info('Skipping post', ['uid' => $receiver, 'url' => $item['uri']]);
544 Logger::info('Accepting post', ['uid' => $receiver, 'url' => $item['uri']]);
547 if ($activity['object_type'] == 'as:Event') {
548 self::createEvent($activity, $item);
551 $item_id = Item::insert($item);
553 Logger::info('Item insertion successful', ['user' => $item['uid'], 'item_id' => $item_id]);
555 Logger::notice('Item insertion aborted', ['user' => $item['uid']]);
558 if ($item['uid'] == 0) {
563 // Store send a follow request for every reshare - but only when the item had been stored
564 if ($stored && ($item['private'] != Item::PRIVATE) && ($item['gravity'] == GRAVITY_PARENT) && ($item['author-link'] != $item['owner-link'])) {
565 $author = APContact::getByURL($item['owner-link'], false);
566 // We send automatic follow requests for reshared messages. (We don't need though for forum posts)
567 if ($author['type'] != 'Group') {
568 Logger::log('Send follow request for ' . $item['uri'] . ' (' . $stored . ') to ' . $item['author-link'], Logger::DEBUG);
569 ActivityPub\Transmitter::sendFollowObject($item['uri'], $item['author-link']);
575 * Creates an mail post
577 * @param array $activity Activity data
578 * @param array $item item array
579 * @return int|bool New mail table row id or false on error
580 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
582 private static function postMail($activity, $item)
584 if (($item['gravity'] != GRAVITY_PARENT) && !DBA::exists('mail', ['uri' => $item['thr-parent'], 'uid' => $item['uid']])) {
585 Logger::info('Parent not found, mail will be discarded.', ['uid' => $item['uid'], 'uri' => $item['thr-parent']]);
589 Logger::info('Direct Message', $item);
592 $msg['uid'] = $item['uid'];
594 $msg['contact-id'] = $item['contact-id'];
596 $contact = Contact::getById($item['contact-id'], ['name', 'url', 'photo']);
597 $msg['from-name'] = $contact['name'];
598 $msg['from-url'] = $contact['url'];
599 $msg['from-photo'] = $contact['photo'];
601 $msg['uri'] = $item['uri'];
602 $msg['created'] = $item['created'];
604 $parent = DBA::selectFirst('mail', ['parent-uri', 'title'], ['uri' => $item['thr-parent']]);
605 if (DBA::isResult($parent)) {
606 $msg['parent-uri'] = $parent['parent-uri'];
607 $msg['title'] = $parent['title'];
609 $msg['parent-uri'] = $item['thr-parent'];
611 if (!empty($item['title'])) {
612 $msg['title'] = $item['title'];
613 } elseif (!empty($item['content-warning'])) {
614 $msg['title'] = $item['content-warning'];
616 // Trying to generate a title out of the body
617 $title = $item['body'];
619 while (preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $title, $matches)) {
620 $title = $matches[3];
623 $title = trim(HTML::toPlaintext(BBCode::convert($title, false, 2, true), 0));
625 if (strlen($title) > 20) {
626 $title = substr($title, 0, 20) . '...';
629 $msg['title'] = $title;
632 $msg['body'] = $item['body'];
634 return Mail::insert($msg);
638 * Fetches missing posts
640 * @param string $url message URL
641 * @param array $child activity array with the child of this message
642 * @return string fetched message URL
643 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
645 public static function fetchMissingActivity($url, $child = [])
647 if (!empty($child['receiver'])) {
648 $uid = ActivityPub\Receiver::getFirstUserFromReceivers($child['receiver']);
653 $object = ActivityPub::fetchContent($url, $uid);
654 if (empty($object)) {
655 Logger::log('Activity ' . $url . ' was not fetchable, aborting.');
659 if (empty($object['id'])) {
660 Logger::log('Activity ' . $url . ' has got not id, aborting. ' . json_encode($object));
664 if (!empty($child['author'])) {
665 $actor = $child['author'];
666 } elseif (!empty($object['actor'])) {
667 $actor = $object['actor'];
668 } elseif (!empty($object['attributedTo'])) {
669 $actor = $object['attributedTo'];
675 if (!empty($object['published'])) {
676 $published = $object['published'];
677 } elseif (!empty($child['published'])) {
678 $published = $child['published'];
680 $published = DateTimeFormat::utcNow();
684 $activity['@context'] = $object['@context'];
685 unset($object['@context']);
686 $activity['id'] = $object['id'];
687 $activity['to'] = $object['to'] ?? [];
688 $activity['cc'] = $object['cc'] ?? [];
689 $activity['actor'] = $actor;
690 $activity['object'] = $object;
691 $activity['published'] = $published;
692 $activity['type'] = 'Create';
694 $ldactivity = JsonLD::compact($activity);
696 $ldactivity['thread-completion'] = true;
698 ActivityPub\Receiver::processActivity($ldactivity, json_encode($activity));
700 Logger::notice('Activity had been fetched and processed.', ['url' => $url, 'object' => $activity['id']]);
702 return $activity['id'];
706 * perform a "follow" request
708 * @param array $activity
709 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
710 * @throws \ImagickException
712 public static function followUser($activity)
714 $uid = User::getIdForURL($activity['object_id']);
719 $owner = User::getOwnerDataById($uid);
721 $cid = Contact::getIdForURL($activity['actor'], $uid);
723 self::switchContact($cid);
724 DBA::update('contact', ['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
725 $contact = DBA::selectFirst('contact', [], ['id' => $cid, 'network' => Protocol::NATIVE_SUPPORT]);
730 $item = ['author-id' => Contact::getIdForURL($activity['actor']),
731 'author-link' => $activity['actor']];
733 $note = Strings::escapeTags(trim($activity['content'] ?? ''));
735 // Ensure that the contact has got the right network type
736 self::switchContact($item['author-id']);
738 $result = Contact::addRelationship($owner, $contact, $item, false, $note);
739 if ($result === true) {
740 ActivityPub\Transmitter::sendContactAccept($item['author-link'], $item['author-id'], $owner['uid']);
743 $cid = Contact::getIdForURL($activity['actor'], $uid);
748 if (empty($contact)) {
749 DBA::update('contact', ['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
752 Logger::log('Follow user ' . $uid . ' from contact ' . $cid . ' with id ' . $activity['id']);
756 * Update the given profile
758 * @param array $activity
761 public static function updatePerson($activity)
763 if (empty($activity['object_id'])) {
767 Logger::log('Updating profile for ' . $activity['object_id'], Logger::DEBUG);
768 Contact::updateFromProbeByURL($activity['object_id'], true);
772 * Delete the given profile
774 * @param array $activity
775 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
777 public static function deletePerson($activity)
779 if (empty($activity['object_id']) || empty($activity['actor'])) {
780 Logger::log('Empty object id or actor.', Logger::DEBUG);
784 if ($activity['object_id'] != $activity['actor']) {
785 Logger::log('Object id does not match actor.', Logger::DEBUG);
789 $contacts = DBA::select('contact', ['id'], ['nurl' => Strings::normaliseLink($activity['object_id'])]);
790 while ($contact = DBA::fetch($contacts)) {
791 Contact::remove($contact['id']);
793 DBA::close($contacts);
795 Logger::log('Deleted contact ' . $activity['object_id'], Logger::DEBUG);
799 * Accept a follow request
801 * @param array $activity
802 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
803 * @throws \ImagickException
805 public static function acceptFollowUser($activity)
807 $uid = User::getIdForURL($activity['object_actor']);
812 $cid = Contact::getIdForURL($activity['actor'], $uid);
814 Logger::log('No contact found for ' . $activity['actor'], Logger::DEBUG);
818 self::switchContact($cid);
820 $fields = ['pending' => false];
822 $contact = DBA::selectFirst('contact', ['rel'], ['id' => $cid]);
823 if ($contact['rel'] == Contact::FOLLOWER) {
824 $fields['rel'] = Contact::FRIEND;
827 $condition = ['id' => $cid];
828 DBA::update('contact', $fields, $condition);
829 Logger::log('Accept contact request from contact ' . $cid . ' for user ' . $uid, Logger::DEBUG);
833 * Reject a follow request
835 * @param array $activity
836 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
837 * @throws \ImagickException
839 public static function rejectFollowUser($activity)
841 $uid = User::getIdForURL($activity['object_actor']);
846 $cid = Contact::getIdForURL($activity['actor'], $uid);
848 Logger::log('No contact found for ' . $activity['actor'], Logger::DEBUG);
852 self::switchContact($cid);
854 if (DBA::exists('contact', ['id' => $cid, 'rel' => Contact::SHARING])) {
855 Contact::remove($cid);
856 Logger::log('Rejected contact request from contact ' . $cid . ' for user ' . $uid . ' - contact had been removed.', Logger::DEBUG);
858 Logger::log('Rejected contact request from contact ' . $cid . ' for user ' . $uid . '.', Logger::DEBUG);
863 * Undo activity like "like" or "dislike"
865 * @param array $activity
866 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
867 * @throws \ImagickException
869 public static function undoActivity($activity)
871 if (empty($activity['object_id'])) {
875 if (empty($activity['object_actor'])) {
879 $author_id = Contact::getIdForURL($activity['object_actor']);
880 if (empty($author_id)) {
884 Item::markForDeletion(['uri' => $activity['object_id'], 'author-id' => $author_id, 'gravity' => GRAVITY_ACTIVITY]);
888 * Activity to remove a follower
890 * @param array $activity
891 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
892 * @throws \ImagickException
894 public static function undoFollowUser($activity)
896 $uid = User::getIdForURL($activity['object_object']);
901 $owner = User::getOwnerDataById($uid);
903 $cid = Contact::getIdForURL($activity['actor'], $uid);
905 Logger::log('No contact found for ' . $activity['actor'], Logger::DEBUG);
909 self::switchContact($cid);
911 $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
912 if (!DBA::isResult($contact)) {
916 Contact::removeFollower($owner, $contact);
917 Logger::log('Undo following request from contact ' . $cid . ' for user ' . $uid, Logger::DEBUG);
921 * Switches a contact to AP if needed
923 * @param integer $cid Contact ID
926 private static function switchContact($cid)
928 $contact = DBA::selectFirst('contact', ['network', 'url'], ['id' => $cid]);
929 if (!DBA::isResult($contact) || in_array($contact['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN]) || Contact::isLocal($contact['url'])) {
933 Logger::info('Change existing contact', ['cid' => $cid, 'previous' => $contact['network']]);
934 Contact::updateFromProbe($cid);
938 * Collects implicit mentions like:
939 * - the author of the parent item
940 * - all the mentioned conversants in the parent item
942 * @param array $parent Item array with at least ['id', 'author-link', 'alias']
944 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
946 private static function getImplicitMentionList(array $parent)
948 if (DI::config()->get('system', 'disable_implicit_mentions')) {
952 $parent_terms = Term::tagArrayFromItemId($parent['id'], [Term::MENTION, Term::IMPLICIT_MENTION]);
954 $parent_author = Contact::getDetailsByURL($parent['author-link'], 0);
956 $implicit_mentions = [];
957 if (empty($parent_author)) {
958 Logger::notice('Author public contact unknown.', ['author-link' => $parent['author-link'], 'item-id' => $parent['id']]);
960 $implicit_mentions[] = $parent_author['url'];
961 $implicit_mentions[] = $parent_author['nurl'];
962 $implicit_mentions[] = $parent_author['alias'];
965 if (!empty($parent['alias'])) {
966 $implicit_mentions[] = $parent['alias'];
969 foreach ($parent_terms as $term) {
970 $contact = Contact::getDetailsByURL($term['url'], 0);
971 if (!empty($contact)) {
972 $implicit_mentions[] = $contact['url'];
973 $implicit_mentions[] = $contact['nurl'];
974 $implicit_mentions[] = $contact['alias'];
978 return $implicit_mentions;
982 * Strips from the body prepended implicit mentions
984 * @param string $body
985 * @param array $potential_mentions
988 private static function removeImplicitMentionsFromBody($body, array $potential_mentions)
990 if (DI::config()->get('system', 'disable_implicit_mentions')) {
996 // Extract one prepended mention at a time from the body
997 while(preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $body, $matches)) {
998 if (!in_array($matches[2], $potential_mentions)) {
999 $kept_mentions[] = $matches[1];
1002 $body = $matches[3];
1005 // Re-appending the kept mentions to the body after extraction
1006 $kept_mentions[] = $body;
1008 return implode('', $kept_mentions);
1011 private static function convertImplicitMentionsInTags($activity_tags, array $potential_mentions)
1013 if (DI::config()->get('system', 'disable_implicit_mentions')) {
1014 return $activity_tags;
1017 foreach ($activity_tags as $index => $tag) {
1018 if (in_array($tag['href'], $potential_mentions)) {
1019 $activity_tags[$index]['name'] = preg_replace(
1020 '/' . preg_quote(Term::TAG_CHARACTER[Term::MENTION], '/') . '/',
1021 Term::TAG_CHARACTER[Term::IMPLICIT_MENTION],
1022 $activity_tags[$index]['name'],
1028 return $activity_tags;