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\User;
39 use Friendica\Protocol\Activity;
40 use Friendica\Protocol\ActivityPub;
41 use Friendica\Util\DateTimeFormat;
42 use Friendica\Util\JsonLD;
43 use Friendica\Util\Strings;
46 * ActivityPub Processor Protocol class
51 * Converts mentions from Pleroma into the Friendica format
55 * @return string converted body
57 private static function convertMentions($body)
59 $URLSearchString = "^\[\]";
60 $body = preg_replace("/\[url\=([$URLSearchString]*)\]([#@!])(.*?)\[\/url\]/ism", '$2[url=$1]$3[/url]', $body);
66 * Replaces emojis in the body
68 * @param array $emojis
71 * @return string with replaced emojis
73 private static function replaceEmojis($body, array $emojis)
75 foreach ($emojis as $emoji) {
76 $replace = '[class=emoji mastodon][img=' . $emoji['href'] . ']' . $emoji['name'] . '[/img][/class]';
77 $body = str_replace($emoji['name'], $replace, $body);
83 * Add attachment data to the item array
85 * @param array $activity
90 private static function constructAttachList($activity, $item)
92 if (empty($activity['attachments'])) {
96 foreach ($activity['attachments'] as $attach) {
97 switch ($attach['type']) {
99 // Only one [attachment] tag is allowed
100 $existingAttachmentPos = strpos($item['body'], '[attachment');
101 if ($existingAttachmentPos !== false) {
102 $linkTitle = $attach['title'] ?: $attach['url'];
103 // Additional link attachments are prepended before the existing [attachment] tag
104 $item['body'] = substr_replace($item['body'], "\n[bookmark=" . $attach['url'] . ']' . $linkTitle . "[/bookmark]\n", $existingAttachmentPos, 0);
106 $item['body'] .= "\n[attachment type='link' url='" . $attach['url'] . "' title='" . ($attach['title'] ?? '') . "' image='" . ($attach['image'] ?? '') . "']" . ($attach['desc'] ?? '') . '[/attachment]';
110 $filetype = strtolower(substr($attach['mediaType'], 0, strpos($attach['mediaType'], '/')));
111 if ($filetype == 'image') {
112 if (!empty($activity['source']) && strpos($activity['source'], $attach['url'])) {
116 if (empty($attach['name'])) {
117 $item['body'] .= "\n[img]" . $attach['url'] . '[/img]';
119 $item['body'] .= "\n[img=" . $attach['url'] . ']' . $attach['name'] . '[/img]';
121 } elseif ($filetype == 'audio') {
122 if (!empty($activity['source']) && strpos($activity['source'], $attach['url'])) {
126 $item['body'] .= "\n[audio]" . $attach['url'] . '[/audio]';
127 } elseif ($filetype == 'video') {
128 if (!empty($activity['source']) && strpos($activity['source'], $attach['url'])) {
132 $item['body'] .= "\n[video]" . $attach['url'] . '[/video]';
134 if (!empty($item["attach"])) {
135 $item["attach"] .= ',';
137 $item["attach"] = '';
140 $item["attach"] .= '[attach]href="' . $attach['url'] . '" length="' . ($attach['length'] ?? '0') . '" type="' . $attach['mediaType'] . '" title="' . ($attach['name'] ?? '') . '"[/attach]';
151 * @param array $activity Activity array
152 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
154 public static function updateItem($activity)
156 $item = Item::selectFirst(['uri', 'uri-id', 'thr-parent', 'gravity'], ['uri' => $activity['id']]);
157 if (!DBA::isResult($item)) {
158 Logger::warning('No existing item, item will be created', ['uri' => $activity['id']]);
159 self::createItem($activity);
163 $item['changed'] = DateTimeFormat::utcNow();
164 $item['edited'] = DateTimeFormat::utc($activity['updated']);
166 $item = self::processContent($activity, $item);
171 Item::update($item, ['uri' => $activity['id']]);
175 * Prepares data for a message
177 * @param array $activity Activity array
178 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
179 * @throws \ImagickException
181 public static function createItem($activity)
184 $item['verb'] = Activity::POST;
185 $item['thr-parent'] = $activity['reply-to-id'];
187 if ($activity['reply-to-id'] == $activity['id']) {
188 $item['gravity'] = GRAVITY_PARENT;
189 $item['object-type'] = Activity\ObjectType::NOTE;
191 $item['gravity'] = GRAVITY_COMMENT;
192 $item['object-type'] = Activity\ObjectType::COMMENT;
194 // Ensure that the comment reaches all receivers of the referring post
195 $activity['receiver'] = self::addReceivers($activity);
198 if (empty($activity['directmessage']) && ($activity['id'] != $activity['reply-to-id']) && !Item::exists(['uri' => $activity['reply-to-id']])) {
199 Logger::notice('Parent not found. Try to refetch it.', ['parent' => $activity['reply-to-id']]);
200 self::fetchMissingActivity($activity['reply-to-id'], $activity);
203 $item['diaspora_signed_text'] = $activity['diaspora:comment'] ?? '';
205 self::postItem($activity, $item);
211 * @param array $activity
212 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
213 * @throws \ImagickException
215 public static function deleteItem($activity)
217 $owner = Contact::getIdForURL($activity['actor']);
219 Logger::log('Deleting item ' . $activity['object_id'] . ' from ' . $owner, Logger::DEBUG);
220 Item::markForDeletion(['uri' => $activity['object_id'], 'owner-id' => $owner]);
224 * Prepare the item array for an activity
226 * @param array $activity Activity array
227 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
228 * @throws \ImagickException
230 public static function addTag($activity)
232 if (empty($activity['object_content']) || empty($activity['object_id'])) {
236 foreach ($activity['receiver'] as $receiver) {
237 $item = Item::selectFirst(['id', 'uri-id', 'tag', 'origin', 'author-link'], ['uri' => $activity['target_id'], 'uid' => $receiver]);
238 if (!DBA::isResult($item)) {
239 // We don't fetch missing content for this purpose
243 if (($item['author-link'] != $activity['actor']) && !$item['origin']) {
244 Logger::info('Not origin, not from the author, skipping update', ['id' => $item['id'], 'author' => $item['author-link'], 'actor' => $activity['actor']]);
248 Tag::store($item['uri-id'], Tag::HASHTAG, $activity['object_content'], $activity['object_id']);
249 Logger::info('Tagged item', ['id' => $item['id'], 'tag' => $activity['object_content'], 'uri' => $activity['target_id'], 'actor' => $activity['actor']]);
254 * Add users to the receiver list of the given public activity.
255 * This is used to ensure that the activity will be stored in every thread.
257 * @param array $activity Activity array
258 * @return array Modified receiver list
260 private static function addReceivers(array $activity)
262 if (!in_array(0, $activity['receiver'])) {
263 // Private activities will not be modified
264 return $activity['receiver'];
267 // Add all owners of the referring item to the receivers
268 $original = $receivers = $activity['receiver'];
269 $items = Item::select(['uid'], ['uri' => $activity['object_id']]);
270 while ($item = DBA::fetch($items)) {
271 $receivers['uid:' . $item['uid']] = $item['uid'];
275 if (count($original) != count($receivers)) {
276 Logger::info('Improved data', ['id' => $activity['id'], 'object' => $activity['object_id'], 'original' => $original, 'improved' => $receivers]);
283 * Prepare the item array for an activity
285 * @param array $activity Activity array
286 * @param string $verb Activity verb
287 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
288 * @throws \ImagickException
290 public static function createActivity($activity, $verb)
293 $item['verb'] = $verb;
294 $item['thr-parent'] = $activity['object_id'];
295 $item['gravity'] = GRAVITY_ACTIVITY;
296 $item['object-type'] = Activity\ObjectType::NOTE;
298 $item['diaspora_signed_text'] = $activity['diaspora:like'] ?? '';
300 $activity['receiver'] = self::addReceivers($activity);
302 self::postItem($activity, $item);
308 * @param array $activity Activity array
312 public static function createEvent($activity, $item)
314 $event['summary'] = HTML::toBBCode($activity['name']);
315 $event['desc'] = HTML::toBBCode($activity['content']);
316 $event['start'] = $activity['start-time'];
317 $event['finish'] = $activity['end-time'];
318 $event['nofinish'] = empty($event['finish']);
319 $event['location'] = $activity['location'];
320 $event['adjust'] = true;
321 $event['cid'] = $item['contact-id'];
322 $event['uid'] = $item['uid'];
323 $event['uri'] = $item['uri'];
324 $event['edited'] = $item['edited'];
325 $event['private'] = $item['private'];
326 $event['guid'] = $item['guid'];
327 $event['plink'] = $item['plink'];
329 $condition = ['uri' => $item['uri'], 'uid' => $item['uid']];
330 $ev = DBA::selectFirst('event', ['id'], $condition);
331 if (DBA::isResult($ev)) {
332 $event['id'] = $ev['id'];
335 $event_id = Event::store($event);
336 Logger::log('Event '.$event_id.' was stored', Logger::DEBUG);
340 * Process the content
342 * @param array $activity Activity array
344 * @return array|bool Returns the item array or false if there was an unexpected occurrence
347 private static function processContent($activity, $item)
349 $item['title'] = HTML::toBBCode($activity['name']);
351 if (!empty($activity['source'])) {
352 $item['body'] = $activity['source'];
354 $content = HTML::toBBCode($activity['content']);
356 if (!empty($activity['emojis'])) {
357 $content = self::replaceEmojis($content, $activity['emojis']);
360 $content = self::convertMentions($content);
362 if (empty($activity['directmessage']) && ($item['thr-parent'] != $item['uri']) && ($item['gravity'] == GRAVITY_COMMENT)) {
363 $item_private = !in_array(0, $activity['item_receiver']);
364 $parent = Item::selectFirst(['id', 'uri-id', 'private', 'author-link', 'alias'], ['uri' => $item['thr-parent']]);
365 if (!DBA::isResult($parent)) {
366 Logger::warning('Unknown parent item.', ['uri' => $item['thr-parent']]);
369 if ($item_private && ($parent['private'] == Item::PRIVATE)) {
370 Logger::warning('Item is private but the parent is not. Dropping.', ['item-uri' => $item['uri'], 'thr-parent' => $item['thr-parent']]);
374 $content = self::removeImplicitMentionsFromBody($content, $parent);
376 $item['content-warning'] = HTML::toBBCode($activity['summary']);
377 $item['body'] = $content;
380 self::storeFromBody($item);
381 self::storeTags($item['uri-id'], $activity['tags']);
383 $item['location'] = $activity['location'];
385 if (!empty($item['latitude']) && !empty($item['longitude'])) {
386 $item['coord'] = $item['latitude'] . ' ' . $item['longitude'];
389 $item['app'] = $activity['generator'];
395 * Store hashtags and mentions
399 private static function storeFromBody(array $item)
401 // Make sure to delete all existing tags (can happen when called via the update functionality)
402 DBA::delete('post-tag', ['uri-id' => $item['uri-id']]);
404 Tag::storeFromBody($item['uri-id'], $item['body'], '@!');
408 * Generate a GUID out of an URL
410 * @param string $url message URL
411 * @return string with GUID
413 private static function getGUIDByURL(string $url)
415 $parsed = parse_url($url);
417 $host_hash = hash('crc32', $parsed['host']);
419 unset($parsed["scheme"]);
420 unset($parsed["host"]);
422 $path = implode("/", $parsed);
424 return $host_hash . '-'. hash('fnv164', $path) . '-'. hash('joaat', $path);
428 * Creates an item post
430 * @param array $activity Activity data
431 * @param array $item item array
432 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
433 * @throws \ImagickException
435 private static function postItem($activity, $item)
437 /// @todo What to do with $activity['context']?
438 if (empty($activity['directmessage']) && ($item['gravity'] != GRAVITY_PARENT) && !Item::exists(['uri' => $item['thr-parent']])) {
439 Logger::info('Parent not found, message will be discarded.', ['thr-parent' => $item['thr-parent']]);
443 $item['network'] = Protocol::ACTIVITYPUB;
444 $item['author-link'] = $activity['author'];
445 $item['author-id'] = Contact::getIdForURL($activity['author'], 0, true);
446 $item['owner-link'] = $activity['actor'];
447 $item['owner-id'] = Contact::getIdForURL($activity['actor'], 0, true);
449 if (in_array(0, $activity['receiver']) && !empty($activity['unlisted'])) {
450 $item['private'] = Item::UNLISTED;
451 } elseif (in_array(0, $activity['receiver'])) {
452 $item['private'] = Item::PUBLIC;
454 $item['private'] = Item::PRIVATE;
457 if (!empty($activity['raw'])) {
458 $item['source'] = $activity['raw'];
459 $item['protocol'] = Conversation::PARCEL_ACTIVITYPUB;
460 $item['conversation-href'] = $activity['context'] ?? '';
461 $item['conversation-uri'] = $activity['conversation'] ?? '';
463 if (isset($activity['push'])) {
464 $item['direction'] = $activity['push'] ? Conversation::PUSH : Conversation::PULL;
470 if (!empty($activity['thread-completion'])) {
471 // Store the original actor in the "causer" fields to enable the check for ignored or blocked contacts
472 $item['causer-link'] = $item['owner-link'];
473 $item['causer-id'] = $item['owner-id'];
475 Logger::info('Ignoring actor because of thread completion.', ['actor' => $item['owner-link']]);
476 $item['owner-link'] = $item['author-link'];
477 $item['owner-id'] = $item['author-id'];
479 $actor = APContact::getByURL($item['owner-link'], false);
480 $isForum = ($actor['type'] == 'Group');
483 $item['uri'] = $activity['id'];
485 $item['created'] = DateTimeFormat::utc($activity['published']);
486 $item['edited'] = DateTimeFormat::utc($activity['updated']);
487 $item['guid'] = $activity['diaspora:guid'] ?: $activity['sc:identifier'] ?: self::getGUIDByURL($item['uri']);
489 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
491 $item = self::processContent($activity, $item);
496 $item['plink'] = $activity['alternate-url'] ?? $item['uri'];
498 $item = self::constructAttachList($activity, $item);
502 foreach ($activity['receiver'] as $receiver) {
503 if ($receiver == -1) {
507 $item['uid'] = $receiver;
510 $item['contact-id'] = Contact::getIdForURL($activity['actor'], $receiver, true);
512 $item['contact-id'] = Contact::getIdForURL($activity['author'], $receiver, true);
515 if (($receiver != 0) && empty($item['contact-id'])) {
516 $item['contact-id'] = Contact::getIdForURL($activity['author'], 0, true);
519 if (!empty($activity['directmessage'])) {
520 self::postMail($activity, $item);
524 if (DI::pConfig()->get($receiver, 'system', 'accept_only_sharer', false) && ($receiver != 0) && ($item['gravity'] == GRAVITY_PARENT)) {
525 $skip = !Contact::isSharingByURL($activity['author'], $receiver);
527 if ($skip && (($activity['type'] == 'as:Announce') || $isForum)) {
528 $skip = !Contact::isSharingByURL($activity['actor'], $receiver);
532 Logger::info('Skipping post', ['uid' => $receiver, 'url' => $item['uri']]);
536 Logger::info('Accepting post', ['uid' => $receiver, 'url' => $item['uri']]);
539 if (($item['gravity'] != GRAVITY_ACTIVITY) && ($activity['object_type'] == 'as:Event')) {
540 self::createEvent($activity, $item);
543 $item_id = Item::insert($item);
545 Logger::info('Item insertion successful', ['user' => $item['uid'], 'item_id' => $item_id]);
547 Logger::notice('Item insertion aborted', ['user' => $item['uid']]);
550 if ($item['uid'] == 0) {
555 // Store send a follow request for every reshare - but only when the item had been stored
556 if ($stored && ($item['private'] != Item::PRIVATE) && ($item['gravity'] == GRAVITY_PARENT) && ($item['author-link'] != $item['owner-link'])) {
557 $author = APContact::getByURL($item['owner-link'], false);
558 // We send automatic follow requests for reshared messages. (We don't need though for forum posts)
559 if ($author['type'] != 'Group') {
560 Logger::log('Send follow request for ' . $item['uri'] . ' (' . $stored . ') to ' . $item['author-link'], Logger::DEBUG);
561 ActivityPub\Transmitter::sendFollowObject($item['uri'], $item['author-link']);
567 * Store tags and mentions into the tag table
569 * @param integer $uriid
572 private static function storeTags(int $uriid, array $tags = null)
574 foreach ($tags as $tag) {
575 if (empty($tag['name']) || empty($tag['type']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
579 $hash = substr($tag['name'], 0, 1);
581 if ($tag['type'] == 'Mention') {
582 if (in_array($hash, [Tag::TAG_CHARACTER[Tag::MENTION],
583 Tag::TAG_CHARACTER[Tag::EXCLUSIVE_MENTION],
584 Tag::TAG_CHARACTER[Tag::IMPLICIT_MENTION]])) {
585 $tag['name'] = substr($tag['name'], 1);
587 $type = Tag::IMPLICIT_MENTION;
589 if (!empty($tag['href'])) {
590 $apcontact = APContact::getByURL($tag['href']);
591 if (!empty($apcontact['name']) || !empty($apcontact['nick'])) {
592 $tag['name'] = $apcontact['name'] ?: $apcontact['nick'];
595 } elseif ($tag['type'] == 'Hashtag') {
596 if ($hash == Tag::TAG_CHARACTER[Tag::HASHTAG]) {
597 $tag['name'] = substr($tag['name'], 1);
599 $type = Tag::HASHTAG;
602 if (empty($tag['name'])) {
606 Tag::store($uriid, $type, $tag['name'], $tag['href']);
611 * Creates an mail post
613 * @param array $activity Activity data
614 * @param array $item item array
615 * @return int|bool New mail table row id or false on error
616 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
618 private static function postMail($activity, $item)
620 if (($item['gravity'] != GRAVITY_PARENT) && !DBA::exists('mail', ['uri' => $item['thr-parent'], 'uid' => $item['uid']])) {
621 Logger::info('Parent not found, mail will be discarded.', ['uid' => $item['uid'], 'uri' => $item['thr-parent']]);
625 Logger::info('Direct Message', $item);
628 $msg['uid'] = $item['uid'];
630 $msg['contact-id'] = $item['contact-id'];
632 $contact = Contact::getById($item['contact-id'], ['name', 'url', 'photo']);
633 $msg['from-name'] = $contact['name'];
634 $msg['from-url'] = $contact['url'];
635 $msg['from-photo'] = $contact['photo'];
637 $msg['uri'] = $item['uri'];
638 $msg['created'] = $item['created'];
640 $parent = DBA::selectFirst('mail', ['parent-uri', 'title'], ['uri' => $item['thr-parent']]);
641 if (DBA::isResult($parent)) {
642 $msg['parent-uri'] = $parent['parent-uri'];
643 $msg['title'] = $parent['title'];
645 $msg['parent-uri'] = $item['thr-parent'];
647 if (!empty($item['title'])) {
648 $msg['title'] = $item['title'];
649 } elseif (!empty($item['content-warning'])) {
650 $msg['title'] = $item['content-warning'];
652 // Trying to generate a title out of the body
653 $title = $item['body'];
655 while (preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $title, $matches)) {
656 $title = $matches[3];
659 $title = trim(HTML::toPlaintext(BBCode::convert($title, false, BBCode::API, true), 0));
661 if (strlen($title) > 20) {
662 $title = substr($title, 0, 20) . '...';
665 $msg['title'] = $title;
668 $msg['body'] = $item['body'];
670 return Mail::insert($msg);
674 * Fetches missing posts
676 * @param string $url message URL
677 * @param array $child activity array with the child of this message
678 * @return string fetched message URL
679 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
681 public static function fetchMissingActivity($url, $child = [])
683 if (!empty($child['receiver'])) {
684 $uid = ActivityPub\Receiver::getFirstUserFromReceivers($child['receiver']);
689 $object = ActivityPub::fetchContent($url, $uid);
690 if (empty($object)) {
691 Logger::log('Activity ' . $url . ' was not fetchable, aborting.');
695 if (empty($object['id'])) {
696 Logger::log('Activity ' . $url . ' has got not id, aborting. ' . json_encode($object));
700 if (!empty($child['author'])) {
701 $actor = $child['author'];
702 } elseif (!empty($object['actor'])) {
703 $actor = $object['actor'];
704 } elseif (!empty($object['attributedTo'])) {
705 $actor = $object['attributedTo'];
711 if (!empty($object['published'])) {
712 $published = $object['published'];
713 } elseif (!empty($child['published'])) {
714 $published = $child['published'];
716 $published = DateTimeFormat::utcNow();
720 $activity['@context'] = $object['@context'];
721 unset($object['@context']);
722 $activity['id'] = $object['id'];
723 $activity['to'] = $object['to'] ?? [];
724 $activity['cc'] = $object['cc'] ?? [];
725 $activity['actor'] = $actor;
726 $activity['object'] = $object;
727 $activity['published'] = $published;
728 $activity['type'] = 'Create';
730 $ldactivity = JsonLD::compact($activity);
732 $ldactivity['thread-completion'] = true;
734 ActivityPub\Receiver::processActivity($ldactivity, json_encode($activity));
736 Logger::notice('Activity had been fetched and processed.', ['url' => $url, 'object' => $activity['id']]);
738 return $activity['id'];
742 * perform a "follow" request
744 * @param array $activity
745 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
746 * @throws \ImagickException
748 public static function followUser($activity)
750 $uid = User::getIdForURL($activity['object_id']);
755 $owner = User::getOwnerDataById($uid);
757 $cid = Contact::getIdForURL($activity['actor'], $uid);
759 self::switchContact($cid);
760 DBA::update('contact', ['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
761 $contact = DBA::selectFirst('contact', [], ['id' => $cid, 'network' => Protocol::NATIVE_SUPPORT]);
766 $item = ['author-id' => Contact::getIdForURL($activity['actor']),
767 'author-link' => $activity['actor']];
769 $note = Strings::escapeTags(trim($activity['content'] ?? ''));
771 // Ensure that the contact has got the right network type
772 self::switchContact($item['author-id']);
774 $result = Contact::addRelationship($owner, $contact, $item, false, $note);
775 if ($result === true) {
776 ActivityPub\Transmitter::sendContactAccept($item['author-link'], $item['author-id'], $owner['uid']);
779 $cid = Contact::getIdForURL($activity['actor'], $uid);
784 if (empty($contact)) {
785 DBA::update('contact', ['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
788 Logger::log('Follow user ' . $uid . ' from contact ' . $cid . ' with id ' . $activity['id']);
792 * Update the given profile
794 * @param array $activity
797 public static function updatePerson($activity)
799 if (empty($activity['object_id'])) {
803 Logger::log('Updating profile for ' . $activity['object_id'], Logger::DEBUG);
804 Contact::updateFromProbeByURL($activity['object_id'], true);
808 * Delete the given profile
810 * @param array $activity
811 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
813 public static function deletePerson($activity)
815 if (empty($activity['object_id']) || empty($activity['actor'])) {
816 Logger::log('Empty object id or actor.', Logger::DEBUG);
820 if ($activity['object_id'] != $activity['actor']) {
821 Logger::log('Object id does not match actor.', Logger::DEBUG);
825 $contacts = DBA::select('contact', ['id'], ['nurl' => Strings::normaliseLink($activity['object_id'])]);
826 while ($contact = DBA::fetch($contacts)) {
827 Contact::remove($contact['id']);
829 DBA::close($contacts);
831 Logger::log('Deleted contact ' . $activity['object_id'], Logger::DEBUG);
835 * Accept a follow request
837 * @param array $activity
838 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
839 * @throws \ImagickException
841 public static function acceptFollowUser($activity)
843 $uid = User::getIdForURL($activity['object_actor']);
848 $cid = Contact::getIdForURL($activity['actor'], $uid);
850 Logger::log('No contact found for ' . $activity['actor'], Logger::DEBUG);
854 self::switchContact($cid);
856 $fields = ['pending' => false];
858 $contact = DBA::selectFirst('contact', ['rel'], ['id' => $cid]);
859 if ($contact['rel'] == Contact::FOLLOWER) {
860 $fields['rel'] = Contact::FRIEND;
863 $condition = ['id' => $cid];
864 DBA::update('contact', $fields, $condition);
865 Logger::log('Accept contact request from contact ' . $cid . ' for user ' . $uid, Logger::DEBUG);
869 * Reject a follow request
871 * @param array $activity
872 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
873 * @throws \ImagickException
875 public static function rejectFollowUser($activity)
877 $uid = User::getIdForURL($activity['object_actor']);
882 $cid = Contact::getIdForURL($activity['actor'], $uid);
884 Logger::log('No contact found for ' . $activity['actor'], Logger::DEBUG);
888 self::switchContact($cid);
890 if (DBA::exists('contact', ['id' => $cid, 'rel' => Contact::SHARING])) {
891 Contact::remove($cid);
892 Logger::log('Rejected contact request from contact ' . $cid . ' for user ' . $uid . ' - contact had been removed.', Logger::DEBUG);
894 Logger::log('Rejected contact request from contact ' . $cid . ' for user ' . $uid . '.', Logger::DEBUG);
899 * Undo activity like "like" or "dislike"
901 * @param array $activity
902 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
903 * @throws \ImagickException
905 public static function undoActivity($activity)
907 if (empty($activity['object_id'])) {
911 if (empty($activity['object_actor'])) {
915 $author_id = Contact::getIdForURL($activity['object_actor']);
916 if (empty($author_id)) {
920 Item::markForDeletion(['uri' => $activity['object_id'], 'author-id' => $author_id, 'gravity' => GRAVITY_ACTIVITY]);
924 * Activity to remove a follower
926 * @param array $activity
927 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
928 * @throws \ImagickException
930 public static function undoFollowUser($activity)
932 $uid = User::getIdForURL($activity['object_object']);
937 $owner = User::getOwnerDataById($uid);
939 $cid = Contact::getIdForURL($activity['actor'], $uid);
941 Logger::log('No contact found for ' . $activity['actor'], Logger::DEBUG);
945 self::switchContact($cid);
947 $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
948 if (!DBA::isResult($contact)) {
952 Contact::removeFollower($owner, $contact);
953 Logger::log('Undo following request from contact ' . $cid . ' for user ' . $uid, Logger::DEBUG);
957 * Switches a contact to AP if needed
959 * @param integer $cid Contact ID
962 private static function switchContact($cid)
964 $contact = DBA::selectFirst('contact', ['network', 'url'], ['id' => $cid]);
965 if (!DBA::isResult($contact) || in_array($contact['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN]) || Contact::isLocal($contact['url'])) {
969 Logger::info('Change existing contact', ['cid' => $cid, 'previous' => $contact['network']]);
970 Contact::updateFromProbe($cid);
974 * Collects implicit mentions like:
975 * - the author of the parent item
976 * - all the mentioned conversants in the parent item
978 * @param array $parent Item array with at least ['id', 'author-link', 'alias']
980 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
982 private static function getImplicitMentionList(array $parent)
984 $parent_terms = Tag::getByURIId($parent['uri-id'], [Tag::MENTION, Tag::IMPLICIT_MENTION, Tag::EXCLUSIVE_MENTION]);
986 $parent_author = Contact::getDetailsByURL($parent['author-link'], 0);
988 $implicit_mentions = [];
989 if (empty($parent_author)) {
990 Logger::notice('Author public contact unknown.', ['author-link' => $parent['author-link'], 'item-id' => $parent['id']]);
992 $implicit_mentions[] = $parent_author['url'];
993 $implicit_mentions[] = $parent_author['nurl'];
994 $implicit_mentions[] = $parent_author['alias'];
997 if (!empty($parent['alias'])) {
998 $implicit_mentions[] = $parent['alias'];
1001 foreach ($parent_terms as $term) {
1002 $contact = Contact::getDetailsByURL($term['url'], 0);
1003 if (!empty($contact)) {
1004 $implicit_mentions[] = $contact['url'];
1005 $implicit_mentions[] = $contact['nurl'];
1006 $implicit_mentions[] = $contact['alias'];
1010 return $implicit_mentions;
1014 * Strips from the body prepended implicit mentions
1016 * @param string $body
1017 * @param array $parent
1020 private static function removeImplicitMentionsFromBody(string $body, array $parent)
1022 if (DI::config()->get('system', 'disable_implicit_mentions')) {
1026 $potential_mentions = self::getImplicitMentionList($parent);
1028 $kept_mentions = [];
1030 // Extract one prepended mention at a time from the body
1031 while(preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $body, $matches)) {
1032 if (!in_array($matches[2], $potential_mentions)) {
1033 $kept_mentions[] = $matches[1];
1036 $body = $matches[3];
1039 // Re-appending the kept mentions to the body after extraction
1040 $kept_mentions[] = $body;
1042 return implode('', $kept_mentions);