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\ItemURI;
36 use Friendica\Model\Mail;
37 use Friendica\Model\Tag;
38 use Friendica\Model\Term;
39 use Friendica\Model\User;
40 use Friendica\Protocol\Activity;
41 use Friendica\Protocol\ActivityPub;
42 use Friendica\Util\DateTimeFormat;
43 use Friendica\Util\JsonLD;
44 use Friendica\Util\Strings;
47 * ActivityPub Processor Protocol class
52 * Converts mentions from Pleroma into the Friendica format
56 * @return string converted body
58 private static function convertMentions($body)
60 $URLSearchString = "^\[\]";
61 $body = preg_replace("/\[url\=([$URLSearchString]*)\]([#@!])(.*?)\[\/url\]/ism", '$2[url=$1]$3[/url]', $body);
67 * Replaces emojis in the body
69 * @param array $emojis
72 * @return string with replaced emojis
74 private static function replaceEmojis($body, array $emojis)
76 foreach ($emojis as $emoji) {
77 $replace = '[class=emoji mastodon][img=' . $emoji['href'] . ']' . $emoji['name'] . '[/img][/class]';
78 $body = str_replace($emoji['name'], $replace, $body);
84 * Constructs a string with tags for a given tag array
87 * @param boolean $sensitive
88 * @return string with tags
90 private static function constructTagString(array $tags = null, $sensitive = false)
97 foreach ($tags as $tag) {
98 if (in_array($tag['type'] ?? '', ['Mention', 'Hashtag'])) {
99 if (!empty($tag_text)) {
103 $tag_text .= substr($tag['name'], 0, 1) . '[url=' . $tag['href'] . ']' . substr($tag['name'], 1) . '[/url]';
107 /// @todo add nsfw for $sensitive
113 * Add attachment data to the item array
115 * @param array $activity
118 * @return array array
120 private static function constructAttachList($activity, $item)
122 if (empty($activity['attachments'])) {
126 foreach ($activity['attachments'] as $attach) {
127 $filetype = strtolower(substr($attach['mediaType'], 0, strpos($attach['mediaType'], '/')));
128 if ($filetype == 'image') {
129 if (!empty($activity['source']) && strpos($activity['source'], $attach['url'])) {
133 if (empty($attach['name'])) {
134 $item['body'] .= "\n[img]" . $attach['url'] . '[/img]';
136 $item['body'] .= "\n[img=" . $attach['url'] . ']' . $attach['name'] . '[/img]';
138 } elseif ($filetype == 'audio') {
139 if (!empty($activity['source']) && strpos($activity['source'], $attach['url'])) {
143 $item['body'] .= "\n[audio]" . $attach['url'] . '[/audio]';
144 } elseif ($filetype == 'video') {
145 if (!empty($activity['source']) && strpos($activity['source'], $attach['url'])) {
149 $item['body'] .= "\n[video]" . $attach['url'] . '[/video]';
151 if (!empty($item["attach"])) {
152 $item["attach"] .= ',';
154 $item["attach"] = '';
156 if (!isset($attach['length'])) {
157 $attach['length'] = "0";
159 $item["attach"] .= '[attach]href="'.$attach['url'].'" length="'.$attach['length'].'" type="'.$attach['mediaType'].'" title="'.($attach['name'] ?? '') .'"[/attach]';
169 * @param array $activity Activity array
170 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
172 public static function updateItem($activity)
174 $item = Item::selectFirst(['uri', 'uri-id', 'thr-parent', 'gravity'], ['uri' => $activity['id']]);
175 if (!DBA::isResult($item)) {
176 Logger::warning('Unknown item', ['uri' => $activity['id']]);
180 $item['changed'] = DateTimeFormat::utcNow();
181 $item['edited'] = DateTimeFormat::utc($activity['updated']);
183 $item = self::processContent($activity, $item);
188 Item::update($item, ['uri' => $activity['id']]);
192 * Prepares data for a message
194 * @param array $activity Activity array
195 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
196 * @throws \ImagickException
198 public static function createItem($activity)
201 $item['verb'] = Activity::POST;
202 $item['thr-parent'] = $activity['reply-to-id'];
204 if ($activity['reply-to-id'] == $activity['id']) {
205 $item['gravity'] = GRAVITY_PARENT;
206 $item['object-type'] = Activity\ObjectType::NOTE;
208 $item['gravity'] = GRAVITY_COMMENT;
209 $item['object-type'] = Activity\ObjectType::COMMENT;
211 // Ensure that the comment reaches all receivers of the referring post
212 $activity['receiver'] = self::addReceivers($activity);
215 if (empty($activity['directmessage']) && ($activity['id'] != $activity['reply-to-id']) && !Item::exists(['uri' => $activity['reply-to-id']])) {
216 Logger::notice('Parent not found. Try to refetch it.', ['parent' => $activity['reply-to-id']]);
217 self::fetchMissingActivity($activity['reply-to-id'], $activity);
220 $item['diaspora_signed_text'] = $activity['diaspora:comment'] ?? '';
222 self::postItem($activity, $item);
228 * @param array $activity
229 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
230 * @throws \ImagickException
232 public static function deleteItem($activity)
234 $owner = Contact::getIdForURL($activity['actor']);
236 Logger::log('Deleting item ' . $activity['object_id'] . ' from ' . $owner, Logger::DEBUG);
237 Item::markForDeletion(['uri' => $activity['object_id'], 'owner-id' => $owner]);
241 * Prepare the item array for an activity
243 * @param array $activity Activity array
244 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
245 * @throws \ImagickException
247 public static function addTag($activity)
249 if (empty($activity['object_content']) || empty($activity['object_id'])) {
253 foreach ($activity['receiver'] as $receiver) {
254 $item = Item::selectFirst(['id', 'uri-id', 'tag', 'origin', 'author-link'], ['uri' => $activity['target_id'], 'uid' => $receiver]);
255 if (!DBA::isResult($item)) {
256 // We don't fetch missing content for this purpose
260 if (($item['author-link'] != $activity['actor']) && !$item['origin']) {
261 Logger::info('Not origin, not from the author, skipping update', ['id' => $item['id'], 'author' => $item['author-link'], 'actor' => $activity['actor']]);
265 Tag::store($item['uri-id'], Tag::HASHTAG, $activity['object_content'], $activity['object_id']);
268 // - Check if "blocktag" is set
269 // - Check if actor is a contact
271 if (!stristr($item['tag'], trim($activity['object_content']))) {
272 $tag = $item['tag'] . (strlen($item['tag']) ? ',' : '') . '#[url=' . $activity['object_id'] . ']'. $activity['object_content'] . '[/url]';
273 Item::update(['tag' => $tag], ['id' => $item['id']]);
274 Logger::info('Tagged item', ['id' => $item['id'], 'tag' => $activity['object_content'], 'uri' => $activity['target_id'], 'actor' => $activity['actor']]);
280 * Add users to the receiver list of the given public activity.
281 * This is used to ensure that the activity will be stored in every thread.
283 * @param array $activity Activity array
284 * @return array Modified receiver list
286 private static function addReceivers(array $activity)
288 if (!in_array(0, $activity['receiver'])) {
289 // Private activities will not be modified
290 return $activity['receiver'];
293 // Add all owners of the referring item to the receivers
294 $original = $receivers = $activity['receiver'];
295 $items = Item::select(['uid'], ['uri' => $activity['object_id']]);
296 while ($item = DBA::fetch($items)) {
297 $receivers['uid:' . $item['uid']] = $item['uid'];
301 if (count($original) != count($receivers)) {
302 Logger::info('Improved data', ['id' => $activity['id'], 'object' => $activity['object_id'], 'original' => $original, 'improved' => $receivers]);
309 * Prepare the item array for an activity
311 * @param array $activity Activity array
312 * @param string $verb Activity verb
313 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
314 * @throws \ImagickException
316 public static function createActivity($activity, $verb)
319 $item['verb'] = $verb;
320 $item['thr-parent'] = $activity['object_id'];
321 $item['gravity'] = GRAVITY_ACTIVITY;
322 $item['object-type'] = Activity\ObjectType::NOTE;
324 $item['diaspora_signed_text'] = $activity['diaspora:like'] ?? '';
326 $activity['receiver'] = self::addReceivers($activity);
328 self::postItem($activity, $item);
334 * @param array $activity Activity array
338 public static function createEvent($activity, $item)
340 $event['summary'] = HTML::toBBCode($activity['name']);
341 $event['desc'] = HTML::toBBCode($activity['content']);
342 $event['start'] = $activity['start-time'];
343 $event['finish'] = $activity['end-time'];
344 $event['nofinish'] = empty($event['finish']);
345 $event['location'] = $activity['location'];
346 $event['adjust'] = true;
347 $event['cid'] = $item['contact-id'];
348 $event['uid'] = $item['uid'];
349 $event['uri'] = $item['uri'];
350 $event['edited'] = $item['edited'];
351 $event['private'] = $item['private'];
352 $event['guid'] = $item['guid'];
353 $event['plink'] = $item['plink'];
355 $condition = ['uri' => $item['uri'], 'uid' => $item['uid']];
356 $ev = DBA::selectFirst('event', ['id'], $condition);
357 if (DBA::isResult($ev)) {
358 $event['id'] = $ev['id'];
361 $event_id = Event::store($event);
362 Logger::log('Event '.$event_id.' was stored', Logger::DEBUG);
366 * Process the content
368 * @param array $activity Activity array
370 * @return array|bool Returns the item array or false if there was an unexpected occurrence
373 private static function processContent($activity, $item)
375 $item['title'] = HTML::toBBCode($activity['name']);
377 if (!empty($activity['source'])) {
378 $item['body'] = $activity['source'];
380 $content = HTML::toBBCode($activity['content']);
382 if (!empty($activity['emojis'])) {
383 $content = self::replaceEmojis($content, $activity['emojis']);
386 $content = self::convertMentions($content);
388 if (empty($activity['directmessage']) && ($item['thr-parent'] != $item['uri']) && ($item['gravity'] == GRAVITY_COMMENT)) {
389 $item_private = !in_array(0, $activity['item_receiver']);
390 $parent = Item::selectFirst(['id', 'private', 'author-link', 'alias'], ['uri' => $item['thr-parent']]);
391 if (!DBA::isResult($parent)) {
392 Logger::warning('Unknown parent item.', ['uri' => $item['thr-parent']]);
395 if ($item_private && ($parent['private'] == Item::PRIVATE)) {
396 Logger::warning('Item is private but the parent is not. Dropping.', ['item-uri' => $item['uri'], 'thr-parent' => $item['thr-parent']]);
400 $potential_implicit_mentions = self::getImplicitMentionList($parent);
401 $content = self::removeImplicitMentionsFromBody($content, $potential_implicit_mentions);
402 $activity['tags'] = self::convertImplicitMentionsInTags($activity['tags'], $potential_implicit_mentions);
404 $item['content-warning'] = HTML::toBBCode($activity['summary']);
405 $item['body'] = $content;
408 $item['tag'] = self::constructTagString($activity['tags'], $activity['sensitive']);
410 Tag::storeFromBody($item['uri-id'], $item['body'], '@!');
411 self::storeTags($item['uri-id'], $activity['tags']);
413 $item['location'] = $activity['location'];
415 if (!empty($item['latitude']) && !empty($item['longitude'])) {
416 $item['coord'] = $item['latitude'] . ' ' . $item['longitude'];
419 $item['app'] = $activity['generator'];
425 * Generate a GUID out of an URL
427 * @param string $url message URL
428 * @return string with GUID
430 private static function getGUIDByURL(string $url)
432 $parsed = parse_url($url);
434 $host_hash = hash('crc32', $parsed['host']);
436 unset($parsed["scheme"]);
437 unset($parsed["host"]);
439 $path = implode("/", $parsed);
441 return $host_hash . '-'. hash('fnv164', $path) . '-'. hash('joaat', $path);
445 * Creates an item post
447 * @param array $activity Activity data
448 * @param array $item item array
449 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
450 * @throws \ImagickException
452 private static function postItem($activity, $item)
454 /// @todo What to do with $activity['context']?
455 if (empty($activity['directmessage']) && ($item['gravity'] != GRAVITY_PARENT) && !Item::exists(['uri' => $item['thr-parent']])) {
456 Logger::info('Parent not found, message will be discarded.', ['thr-parent' => $item['thr-parent']]);
460 $item['network'] = Protocol::ACTIVITYPUB;
461 $item['author-link'] = $activity['author'];
462 $item['author-id'] = Contact::getIdForURL($activity['author'], 0, true);
463 $item['owner-link'] = $activity['actor'];
464 $item['owner-id'] = Contact::getIdForURL($activity['actor'], 0, true);
466 if (in_array(0, $activity['receiver']) && !empty($activity['unlisted'])) {
467 $item['private'] = Item::UNLISTED;
468 } elseif (in_array(0, $activity['receiver'])) {
469 $item['private'] = Item::PUBLIC;
471 $item['private'] = Item::PRIVATE;
474 if (!empty($activity['raw'])) {
475 $item['source'] = $activity['raw'];
476 $item['protocol'] = Conversation::PARCEL_ACTIVITYPUB;
477 $item['conversation-href'] = $activity['context'] ?? '';
478 $item['conversation-uri'] = $activity['conversation'] ?? '';
480 if (isset($activity['push'])) {
481 $item['direction'] = $activity['push'] ? Conversation::PUSH : Conversation::PULL;
487 if (!empty($activity['thread-completion'])) {
488 // Store the original actor in the "causer" fields to enable the check for ignored or blocked contacts
489 $item['causer-link'] = $item['owner-link'];
490 $item['causer-id'] = $item['owner-id'];
492 Logger::info('Ignoring actor because of thread completion.', ['actor' => $item['owner-link']]);
493 $item['owner-link'] = $item['author-link'];
494 $item['owner-id'] = $item['author-id'];
496 $actor = APContact::getByURL($item['owner-link'], false);
497 $isForum = ($actor['type'] == 'Group');
500 $item['uri'] = $activity['id'];
502 $item['created'] = DateTimeFormat::utc($activity['published']);
503 $item['edited'] = DateTimeFormat::utc($activity['updated']);
504 $item['guid'] = $activity['diaspora:guid'] ?: $activity['sc:identifier'] ?: self::getGUIDByURL($item['uri']);
506 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
508 $item = self::processContent($activity, $item);
513 $item['plink'] = $activity['alternate-url'] ?? $item['uri'];
515 $item = self::constructAttachList($activity, $item);
519 foreach ($activity['receiver'] as $receiver) {
520 if ($receiver == -1) {
524 $item['uid'] = $receiver;
527 $item['contact-id'] = Contact::getIdForURL($activity['actor'], $receiver, true);
529 $item['contact-id'] = Contact::getIdForURL($activity['author'], $receiver, true);
532 if (($receiver != 0) && empty($item['contact-id'])) {
533 $item['contact-id'] = Contact::getIdForURL($activity['author'], 0, true);
536 if (!empty($activity['directmessage'])) {
537 self::postMail($activity, $item);
541 if (DI::pConfig()->get($receiver, 'system', 'accept_only_sharer', false) && ($receiver != 0) && ($item['gravity'] == GRAVITY_PARENT)) {
542 $skip = !Contact::isSharingByURL($activity['author'], $receiver);
544 if ($skip && (($activity['type'] == 'as:Announce') || $isForum)) {
545 $skip = !Contact::isSharingByURL($activity['actor'], $receiver);
549 Logger::info('Skipping post', ['uid' => $receiver, 'url' => $item['uri']]);
553 Logger::info('Accepting post', ['uid' => $receiver, 'url' => $item['uri']]);
556 if (($item['gravity'] != GRAVITY_ACTIVITY) && ($activity['object_type'] == 'as:Event')) {
557 self::createEvent($activity, $item);
560 $item_id = Item::insert($item);
562 Logger::info('Item insertion successful', ['user' => $item['uid'], 'item_id' => $item_id]);
564 Logger::notice('Item insertion aborted', ['user' => $item['uid']]);
567 if ($item['uid'] == 0) {
572 // Store send a follow request for every reshare - but only when the item had been stored
573 if ($stored && ($item['private'] != Item::PRIVATE) && ($item['gravity'] == GRAVITY_PARENT) && ($item['author-link'] != $item['owner-link'])) {
574 $author = APContact::getByURL($item['owner-link'], false);
575 // We send automatic follow requests for reshared messages. (We don't need though for forum posts)
576 if ($author['type'] != 'Group') {
577 Logger::log('Send follow request for ' . $item['uri'] . ' (' . $stored . ') to ' . $item['author-link'], Logger::DEBUG);
578 ActivityPub\Transmitter::sendFollowObject($item['uri'], $item['author-link']);
584 * Store tags and mentions into the tag table
586 * @param integer $uriid
589 private static function storeTags(int $uriid, array $tags = null)
591 // Make sure to delete all existing tags (can happen when called via the update functionality)
592 DBA::delete('post-tag', ['uri-id' => $uriid]);
594 foreach ($tags as $tag) {
595 if (empty($tag['name']) || empty($tag['type']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
599 $hash = substr($tag['name'], 0, 1);
601 if ($tag['type'] == 'Mention') {
602 if (in_array($hash, [Tag::TAG_CHARACTER[Tag::MENTION],
603 Tag::TAG_CHARACTER[Tag::EXCLUSIVE_MENTION],
604 Tag::TAG_CHARACTER[Tag::IMPLICIT_MENTION]])) {
605 $tag['name'] = substr($tag['name'], 1);
607 $type = Tag::IMPLICIT_MENTION;
609 if (!empty($tag['href'])) {
610 $apcontact = APContact::getByURL($tag['href']);
611 if (!empty($apcontact['name']) || !empty($apcontact['nick'])) {
612 $tag['name'] = $apcontact['name'] ?: $apcontact['nick'];
615 } elseif ($tag['type'] == 'Hashtag') {
616 if ($hash == Tag::TAG_CHARACTER[Tag::HASHTAG]) {
617 $tag['name'] = substr($tag['name'], 1);
619 $type = Tag::HASHTAG;
622 if (empty($tag['name'])) {
626 Tag::store($uriid, $type, $tag['name'], $tag['href']);
631 * Creates an mail post
633 * @param array $activity Activity data
634 * @param array $item item array
635 * @return int|bool New mail table row id or false on error
636 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
638 private static function postMail($activity, $item)
640 if (($item['gravity'] != GRAVITY_PARENT) && !DBA::exists('mail', ['uri' => $item['thr-parent'], 'uid' => $item['uid']])) {
641 Logger::info('Parent not found, mail will be discarded.', ['uid' => $item['uid'], 'uri' => $item['thr-parent']]);
645 Logger::info('Direct Message', $item);
648 $msg['uid'] = $item['uid'];
650 $msg['contact-id'] = $item['contact-id'];
652 $contact = Contact::getById($item['contact-id'], ['name', 'url', 'photo']);
653 $msg['from-name'] = $contact['name'];
654 $msg['from-url'] = $contact['url'];
655 $msg['from-photo'] = $contact['photo'];
657 $msg['uri'] = $item['uri'];
658 $msg['created'] = $item['created'];
660 $parent = DBA::selectFirst('mail', ['parent-uri', 'title'], ['uri' => $item['thr-parent']]);
661 if (DBA::isResult($parent)) {
662 $msg['parent-uri'] = $parent['parent-uri'];
663 $msg['title'] = $parent['title'];
665 $msg['parent-uri'] = $item['thr-parent'];
667 if (!empty($item['title'])) {
668 $msg['title'] = $item['title'];
669 } elseif (!empty($item['content-warning'])) {
670 $msg['title'] = $item['content-warning'];
672 // Trying to generate a title out of the body
673 $title = $item['body'];
675 while (preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $title, $matches)) {
676 $title = $matches[3];
679 $title = trim(HTML::toPlaintext(BBCode::convert($title, false, 2, true), 0));
681 if (strlen($title) > 20) {
682 $title = substr($title, 0, 20) . '...';
685 $msg['title'] = $title;
688 $msg['body'] = $item['body'];
690 return Mail::insert($msg);
694 * Fetches missing posts
696 * @param string $url message URL
697 * @param array $child activity array with the child of this message
698 * @return string fetched message URL
699 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
701 public static function fetchMissingActivity($url, $child = [])
703 if (!empty($child['receiver'])) {
704 $uid = ActivityPub\Receiver::getFirstUserFromReceivers($child['receiver']);
709 $object = ActivityPub::fetchContent($url, $uid);
710 if (empty($object)) {
711 Logger::log('Activity ' . $url . ' was not fetchable, aborting.');
715 if (empty($object['id'])) {
716 Logger::log('Activity ' . $url . ' has got not id, aborting. ' . json_encode($object));
720 if (!empty($child['author'])) {
721 $actor = $child['author'];
722 } elseif (!empty($object['actor'])) {
723 $actor = $object['actor'];
724 } elseif (!empty($object['attributedTo'])) {
725 $actor = $object['attributedTo'];
731 if (!empty($object['published'])) {
732 $published = $object['published'];
733 } elseif (!empty($child['published'])) {
734 $published = $child['published'];
736 $published = DateTimeFormat::utcNow();
740 $activity['@context'] = $object['@context'];
741 unset($object['@context']);
742 $activity['id'] = $object['id'];
743 $activity['to'] = $object['to'] ?? [];
744 $activity['cc'] = $object['cc'] ?? [];
745 $activity['actor'] = $actor;
746 $activity['object'] = $object;
747 $activity['published'] = $published;
748 $activity['type'] = 'Create';
750 $ldactivity = JsonLD::compact($activity);
752 $ldactivity['thread-completion'] = true;
754 ActivityPub\Receiver::processActivity($ldactivity, json_encode($activity));
756 Logger::notice('Activity had been fetched and processed.', ['url' => $url, 'object' => $activity['id']]);
758 return $activity['id'];
762 * perform a "follow" request
764 * @param array $activity
765 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
766 * @throws \ImagickException
768 public static function followUser($activity)
770 $uid = User::getIdForURL($activity['object_id']);
775 $owner = User::getOwnerDataById($uid);
777 $cid = Contact::getIdForURL($activity['actor'], $uid);
779 self::switchContact($cid);
780 DBA::update('contact', ['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
781 $contact = DBA::selectFirst('contact', [], ['id' => $cid, 'network' => Protocol::NATIVE_SUPPORT]);
786 $item = ['author-id' => Contact::getIdForURL($activity['actor']),
787 'author-link' => $activity['actor']];
789 $note = Strings::escapeTags(trim($activity['content'] ?? ''));
791 // Ensure that the contact has got the right network type
792 self::switchContact($item['author-id']);
794 $result = Contact::addRelationship($owner, $contact, $item, false, $note);
795 if ($result === true) {
796 ActivityPub\Transmitter::sendContactAccept($item['author-link'], $item['author-id'], $owner['uid']);
799 $cid = Contact::getIdForURL($activity['actor'], $uid);
804 if (empty($contact)) {
805 DBA::update('contact', ['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
808 Logger::log('Follow user ' . $uid . ' from contact ' . $cid . ' with id ' . $activity['id']);
812 * Update the given profile
814 * @param array $activity
817 public static function updatePerson($activity)
819 if (empty($activity['object_id'])) {
823 Logger::log('Updating profile for ' . $activity['object_id'], Logger::DEBUG);
824 Contact::updateFromProbeByURL($activity['object_id'], true);
828 * Delete the given profile
830 * @param array $activity
831 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
833 public static function deletePerson($activity)
835 if (empty($activity['object_id']) || empty($activity['actor'])) {
836 Logger::log('Empty object id or actor.', Logger::DEBUG);
840 if ($activity['object_id'] != $activity['actor']) {
841 Logger::log('Object id does not match actor.', Logger::DEBUG);
845 $contacts = DBA::select('contact', ['id'], ['nurl' => Strings::normaliseLink($activity['object_id'])]);
846 while ($contact = DBA::fetch($contacts)) {
847 Contact::remove($contact['id']);
849 DBA::close($contacts);
851 Logger::log('Deleted contact ' . $activity['object_id'], Logger::DEBUG);
855 * Accept a follow request
857 * @param array $activity
858 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
859 * @throws \ImagickException
861 public static function acceptFollowUser($activity)
863 $uid = User::getIdForURL($activity['object_actor']);
868 $cid = Contact::getIdForURL($activity['actor'], $uid);
870 Logger::log('No contact found for ' . $activity['actor'], Logger::DEBUG);
874 self::switchContact($cid);
876 $fields = ['pending' => false];
878 $contact = DBA::selectFirst('contact', ['rel'], ['id' => $cid]);
879 if ($contact['rel'] == Contact::FOLLOWER) {
880 $fields['rel'] = Contact::FRIEND;
883 $condition = ['id' => $cid];
884 DBA::update('contact', $fields, $condition);
885 Logger::log('Accept contact request from contact ' . $cid . ' for user ' . $uid, Logger::DEBUG);
889 * Reject a follow request
891 * @param array $activity
892 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
893 * @throws \ImagickException
895 public static function rejectFollowUser($activity)
897 $uid = User::getIdForURL($activity['object_actor']);
902 $cid = Contact::getIdForURL($activity['actor'], $uid);
904 Logger::log('No contact found for ' . $activity['actor'], Logger::DEBUG);
908 self::switchContact($cid);
910 if (DBA::exists('contact', ['id' => $cid, 'rel' => Contact::SHARING])) {
911 Contact::remove($cid);
912 Logger::log('Rejected contact request from contact ' . $cid . ' for user ' . $uid . ' - contact had been removed.', Logger::DEBUG);
914 Logger::log('Rejected contact request from contact ' . $cid . ' for user ' . $uid . '.', Logger::DEBUG);
919 * Undo activity like "like" or "dislike"
921 * @param array $activity
922 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
923 * @throws \ImagickException
925 public static function undoActivity($activity)
927 if (empty($activity['object_id'])) {
931 if (empty($activity['object_actor'])) {
935 $author_id = Contact::getIdForURL($activity['object_actor']);
936 if (empty($author_id)) {
940 Item::markForDeletion(['uri' => $activity['object_id'], 'author-id' => $author_id, 'gravity' => GRAVITY_ACTIVITY]);
944 * Activity to remove a follower
946 * @param array $activity
947 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
948 * @throws \ImagickException
950 public static function undoFollowUser($activity)
952 $uid = User::getIdForURL($activity['object_object']);
957 $owner = User::getOwnerDataById($uid);
959 $cid = Contact::getIdForURL($activity['actor'], $uid);
961 Logger::log('No contact found for ' . $activity['actor'], Logger::DEBUG);
965 self::switchContact($cid);
967 $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
968 if (!DBA::isResult($contact)) {
972 Contact::removeFollower($owner, $contact);
973 Logger::log('Undo following request from contact ' . $cid . ' for user ' . $uid, Logger::DEBUG);
977 * Switches a contact to AP if needed
979 * @param integer $cid Contact ID
982 private static function switchContact($cid)
984 $contact = DBA::selectFirst('contact', ['network', 'url'], ['id' => $cid]);
985 if (!DBA::isResult($contact) || in_array($contact['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN]) || Contact::isLocal($contact['url'])) {
989 Logger::info('Change existing contact', ['cid' => $cid, 'previous' => $contact['network']]);
990 Contact::updateFromProbe($cid);
994 * Collects implicit mentions like:
995 * - the author of the parent item
996 * - all the mentioned conversants in the parent item
998 * @param array $parent Item array with at least ['id', 'author-link', 'alias']
1000 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1002 private static function getImplicitMentionList(array $parent)
1004 if (DI::config()->get('system', 'disable_implicit_mentions')) {
1008 $parent_terms = Term::tagArrayFromItemId($parent['id'], [Term::MENTION, Term::IMPLICIT_MENTION]);
1010 $parent_author = Contact::getDetailsByURL($parent['author-link'], 0);
1012 $implicit_mentions = [];
1013 if (empty($parent_author)) {
1014 Logger::notice('Author public contact unknown.', ['author-link' => $parent['author-link'], 'item-id' => $parent['id']]);
1016 $implicit_mentions[] = $parent_author['url'];
1017 $implicit_mentions[] = $parent_author['nurl'];
1018 $implicit_mentions[] = $parent_author['alias'];
1021 if (!empty($parent['alias'])) {
1022 $implicit_mentions[] = $parent['alias'];
1025 foreach ($parent_terms as $term) {
1026 $contact = Contact::getDetailsByURL($term['url'], 0);
1027 if (!empty($contact)) {
1028 $implicit_mentions[] = $contact['url'];
1029 $implicit_mentions[] = $contact['nurl'];
1030 $implicit_mentions[] = $contact['alias'];
1034 return $implicit_mentions;
1038 * Strips from the body prepended implicit mentions
1040 * @param string $body
1041 * @param array $potential_mentions
1044 private static function removeImplicitMentionsFromBody($body, array $potential_mentions)
1046 if (DI::config()->get('system', 'disable_implicit_mentions')) {
1050 $kept_mentions = [];
1052 // Extract one prepended mention at a time from the body
1053 while(preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $body, $matches)) {
1054 if (!in_array($matches[2], $potential_mentions)) {
1055 $kept_mentions[] = $matches[1];
1058 $body = $matches[3];
1061 // Re-appending the kept mentions to the body after extraction
1062 $kept_mentions[] = $body;
1064 return implode('', $kept_mentions);
1067 private static function convertImplicitMentionsInTags($activity_tags, array $potential_mentions)
1069 if (DI::config()->get('system', 'disable_implicit_mentions')) {
1070 return $activity_tags;
1073 foreach ($activity_tags as $index => $tag) {
1074 if (in_array($tag['href'], $potential_mentions)) {
1075 $activity_tags[$index]['name'] = preg_replace(
1076 '/' . preg_quote(Term::TAG_CHARACTER[Term::MENTION], '/') . '/',
1077 Term::TAG_CHARACTER[Term::IMPLICIT_MENTION],
1078 $activity_tags[$index]['name'],
1084 return $activity_tags;