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\Term;
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 * Constructs a string with tags for a given tag array
86 * @param boolean $sensitive
87 * @return string with tags
89 private static function constructTagString(array $tags = null, $sensitive = false)
96 foreach ($tags as $tag) {
97 if (in_array($tag['type'] ?? '', ['Mention', 'Hashtag'])) {
98 if (!empty($tag_text)) {
102 $tag_text .= substr($tag['name'], 0, 1) . '[url=' . $tag['href'] . ']' . substr($tag['name'], 1) . '[/url]';
106 /// @todo add nsfw for $sensitive
112 * Add attachment data to the item array
114 * @param array $activity
117 * @return array array
119 private static function constructAttachList($activity, $item)
121 if (empty($activity['attachments'])) {
125 foreach ($activity['attachments'] as $attach) {
126 $filetype = strtolower(substr($attach['mediaType'], 0, strpos($attach['mediaType'], '/')));
127 if ($filetype == 'image') {
128 if (!empty($activity['source']) && strpos($activity['source'], $attach['url'])) {
132 if (empty($attach['name'])) {
133 $item['body'] .= "\n[img]" . $attach['url'] . '[/img]';
135 $item['body'] .= "\n[img=" . $attach['url'] . ']' . $attach['name'] . '[/img]';
137 } elseif ($filetype == 'audio') {
138 if (!empty($activity['source']) && strpos($activity['source'], $attach['url'])) {
142 $item['body'] .= "\n[audio]" . $attach['url'] . '[/audio]';
143 } elseif ($filetype == 'video') {
144 if (!empty($activity['source']) && strpos($activity['source'], $attach['url'])) {
148 $item['body'] .= "\n[video]" . $attach['url'] . '[/video]';
150 if (!empty($item["attach"])) {
151 $item["attach"] .= ',';
153 $item["attach"] = '';
155 if (!isset($attach['length'])) {
156 $attach['length'] = "0";
158 $item["attach"] .= '[attach]href="'.$attach['url'].'" length="'.$attach['length'].'" type="'.$attach['mediaType'].'" title="'.($attach['name'] ?? '') .'"[/attach]';
168 * @param array $activity Activity array
169 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
171 public static function updateItem($activity)
173 $item = Item::selectFirst(['uri', 'uri-id', 'thr-parent', 'gravity'], ['uri' => $activity['id']]);
174 if (!DBA::isResult($item)) {
175 Logger::warning('Unknown item', ['uri' => $activity['id']]);
179 $item['changed'] = DateTimeFormat::utcNow();
180 $item['edited'] = DateTimeFormat::utc($activity['updated']);
182 $item = self::processContent($activity, $item);
187 Item::update($item, ['uri' => $activity['id']]);
191 * Prepares data for a message
193 * @param array $activity Activity array
194 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
195 * @throws \ImagickException
197 public static function createItem($activity)
200 $item['verb'] = Activity::POST;
201 $item['thr-parent'] = $activity['reply-to-id'];
203 if ($activity['reply-to-id'] == $activity['id']) {
204 $item['gravity'] = GRAVITY_PARENT;
205 $item['object-type'] = Activity\ObjectType::NOTE;
207 $item['gravity'] = GRAVITY_COMMENT;
208 $item['object-type'] = Activity\ObjectType::COMMENT;
210 // Ensure that the comment reaches all receivers of the referring post
211 $activity['receiver'] = self::addReceivers($activity);
214 if (empty($activity['directmessage']) && ($activity['id'] != $activity['reply-to-id']) && !Item::exists(['uri' => $activity['reply-to-id']])) {
215 Logger::notice('Parent not found. Try to refetch it.', ['parent' => $activity['reply-to-id']]);
216 self::fetchMissingActivity($activity['reply-to-id'], $activity);
219 $item['diaspora_signed_text'] = $activity['diaspora:comment'] ?? '';
221 self::postItem($activity, $item);
227 * @param array $activity
228 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
229 * @throws \ImagickException
231 public static function deleteItem($activity)
233 $owner = Contact::getIdForURL($activity['actor']);
235 Logger::log('Deleting item ' . $activity['object_id'] . ' from ' . $owner, Logger::DEBUG);
236 Item::markForDeletion(['uri' => $activity['object_id'], 'owner-id' => $owner]);
240 * Prepare the item array for an activity
242 * @param array $activity Activity array
243 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
244 * @throws \ImagickException
246 public static function addTag($activity)
248 if (empty($activity['object_content']) || empty($activity['object_id'])) {
252 foreach ($activity['receiver'] as $receiver) {
253 $item = Item::selectFirst(['id', 'tag', 'origin', 'author-link'], ['uri' => $activity['target_id'], 'uid' => $receiver]);
254 if (!DBA::isResult($item)) {
255 // We don't fetch missing content for this purpose
259 if (($item['author-link'] != $activity['actor']) && !$item['origin']) {
260 Logger::info('Not origin, not from the author, skipping update', ['id' => $item['id'], 'author' => $item['author-link'], 'actor' => $activity['actor']]);
265 // - Check if "blocktag" is set
266 // - Check if actor is a contact
268 if (!stristr($item['tag'], trim($activity['object_content']))) {
269 $tag = $item['tag'] . (strlen($item['tag']) ? ',' : '') . '#[url=' . $activity['object_id'] . ']'. $activity['object_content'] . '[/url]';
270 Item::update(['tag' => $tag], ['id' => $item['id']]);
271 Logger::info('Tagged item', ['id' => $item['id'], 'tag' => $activity['object_content'], 'uri' => $activity['target_id'], 'actor' => $activity['actor']]);
277 * Add users to the receiver list of the given public activity.
278 * This is used to ensure that the activity will be stored in every thread.
280 * @param array $activity Activity array
281 * @return array Modified receiver list
283 private static function addReceivers(array $activity)
285 if (!in_array(0, $activity['receiver'])) {
286 // Private activities will not be modified
287 return $activity['receiver'];
290 // Add all owners of the referring item to the receivers
291 $original = $receivers = $activity['receiver'];
292 $items = Item::select(['uid'], ['uri' => $activity['object_id']]);
293 while ($item = DBA::fetch($items)) {
294 $receivers['uid:' . $item['uid']] = $item['uid'];
298 if (count($original) != count($receivers)) {
299 Logger::info('Improved data', ['id' => $activity['id'], 'object' => $activity['object_id'], 'original' => $original, 'improved' => $receivers]);
306 * Prepare the item array for an activity
308 * @param array $activity Activity array
309 * @param string $verb Activity verb
310 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
311 * @throws \ImagickException
313 public static function createActivity($activity, $verb)
316 $item['verb'] = $verb;
317 $item['thr-parent'] = $activity['object_id'];
318 $item['gravity'] = GRAVITY_ACTIVITY;
319 $item['object-type'] = Activity\ObjectType::NOTE;
321 $item['diaspora_signed_text'] = $activity['diaspora:like'] ?? '';
323 $activity['receiver'] = self::addReceivers($activity);
325 self::postItem($activity, $item);
331 * @param array $activity Activity array
335 public static function createEvent($activity, $item)
337 $event['summary'] = HTML::toBBCode($activity['name']);
338 $event['desc'] = HTML::toBBCode($activity['content']);
339 $event['start'] = $activity['start-time'];
340 $event['finish'] = $activity['end-time'];
341 $event['nofinish'] = empty($event['finish']);
342 $event['location'] = $activity['location'];
343 $event['adjust'] = true;
344 $event['cid'] = $item['contact-id'];
345 $event['uid'] = $item['uid'];
346 $event['uri'] = $item['uri'];
347 $event['edited'] = $item['edited'];
348 $event['private'] = $item['private'];
349 $event['guid'] = $item['guid'];
350 $event['plink'] = $item['plink'];
352 $condition = ['uri' => $item['uri'], 'uid' => $item['uid']];
353 $ev = DBA::selectFirst('event', ['id'], $condition);
354 if (DBA::isResult($ev)) {
355 $event['id'] = $ev['id'];
358 $event_id = Event::store($event);
359 Logger::log('Event '.$event_id.' was stored', Logger::DEBUG);
363 * Process the content
365 * @param array $activity Activity array
367 * @return array|bool Returns the item array or false if there was an unexpected occurrence
370 private static function processContent($activity, $item)
372 $item['title'] = HTML::toBBCode($activity['name']);
374 if (!empty($activity['source'])) {
375 $item['body'] = $activity['source'];
377 $content = HTML::toBBCode($activity['content']);
379 if (!empty($activity['emojis'])) {
380 $content = self::replaceEmojis($content, $activity['emojis']);
383 $content = self::convertMentions($content);
385 if (empty($activity['directmessage']) && ($item['thr-parent'] != $item['uri']) && ($item['gravity'] == GRAVITY_COMMENT)) {
386 $item_private = !in_array(0, $activity['item_receiver']);
387 $parent = Item::selectFirst(['id', 'private', 'author-link', 'alias'], ['uri' => $item['thr-parent']]);
388 if (!DBA::isResult($parent)) {
389 Logger::warning('Unknown parent item.', ['uri' => $item['thr-parent']]);
392 if ($item_private && ($parent['private'] == Item::PRIVATE)) {
393 Logger::warning('Item is private but the parent is not. Dropping.', ['item-uri' => $item['uri'], 'thr-parent' => $item['thr-parent']]);
397 $potential_implicit_mentions = self::getImplicitMentionList($parent);
398 $content = self::removeImplicitMentionsFromBody($content, $potential_implicit_mentions);
399 $activity['tags'] = self::convertImplicitMentionsInTags($activity['tags'], $potential_implicit_mentions);
401 $item['content-warning'] = HTML::toBBCode($activity['summary']);
402 $item['body'] = $content;
405 $item['tag'] = self::constructTagString($activity['tags'], $activity['sensitive']);
407 self::storeTags($item['uri-id'], $activity['tags']);
409 $item['location'] = $activity['location'];
411 if (!empty($item['latitude']) && !empty($item['longitude'])) {
412 $item['coord'] = $item['latitude'] . ' ' . $item['longitude'];
415 $item['app'] = $activity['generator'];
421 * Generate a GUID out of an URL
423 * @param string $url message URL
424 * @return string with GUID
426 private static function getGUIDByURL(string $url)
428 $parsed = parse_url($url);
430 $host_hash = hash('crc32', $parsed['host']);
432 unset($parsed["scheme"]);
433 unset($parsed["host"]);
435 $path = implode("/", $parsed);
437 return $host_hash . '-'. hash('fnv164', $path) . '-'. hash('joaat', $path);
441 * Creates an item post
443 * @param array $activity Activity data
444 * @param array $item item array
445 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
446 * @throws \ImagickException
448 private static function postItem($activity, $item)
450 /// @todo What to do with $activity['context']?
451 if (empty($activity['directmessage']) && ($item['gravity'] != GRAVITY_PARENT) && !Item::exists(['uri' => $item['thr-parent']])) {
452 Logger::info('Parent not found, message will be discarded.', ['thr-parent' => $item['thr-parent']]);
456 $item['network'] = Protocol::ACTIVITYPUB;
457 $item['author-link'] = $activity['author'];
458 $item['author-id'] = Contact::getIdForURL($activity['author'], 0, true);
459 $item['owner-link'] = $activity['actor'];
460 $item['owner-id'] = Contact::getIdForURL($activity['actor'], 0, true);
462 if (in_array(0, $activity['receiver']) && !empty($activity['unlisted'])) {
463 $item['private'] = Item::UNLISTED;
464 } elseif (in_array(0, $activity['receiver'])) {
465 $item['private'] = Item::PUBLIC;
467 $item['private'] = Item::PRIVATE;
470 if (!empty($activity['raw'])) {
471 $item['source'] = $activity['raw'];
472 $item['protocol'] = Conversation::PARCEL_ACTIVITYPUB;
473 $item['conversation-href'] = $activity['context'] ?? '';
474 $item['conversation-uri'] = $activity['conversation'] ?? '';
476 if (isset($activity['push'])) {
477 $item['direction'] = $activity['push'] ? Conversation::PUSH : Conversation::PULL;
483 if (!empty($activity['thread-completion'])) {
484 // Store the original actor in the "causer" fields to enable the check for ignored or blocked contacts
485 $item['causer-link'] = $item['owner-link'];
486 $item['causer-id'] = $item['owner-id'];
488 Logger::info('Ignoring actor because of thread completion.', ['actor' => $item['owner-link']]);
489 $item['owner-link'] = $item['author-link'];
490 $item['owner-id'] = $item['author-id'];
492 $actor = APContact::getByURL($item['owner-link'], false);
493 $isForum = ($actor['type'] == 'Group');
496 $item['uri'] = $activity['id'];
498 $item['created'] = DateTimeFormat::utc($activity['published']);
499 $item['edited'] = DateTimeFormat::utc($activity['updated']);
500 $item['guid'] = $activity['diaspora:guid'] ?: $activity['sc:identifier'] ?: self::getGUIDByURL($item['uri']);
502 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
504 $item = self::processContent($activity, $item);
509 $item['plink'] = $activity['alternate-url'] ?? $item['uri'];
511 $item = self::constructAttachList($activity, $item);
515 foreach ($activity['receiver'] as $receiver) {
516 if ($receiver == -1) {
520 $item['uid'] = $receiver;
523 $item['contact-id'] = Contact::getIdForURL($activity['actor'], $receiver, true);
525 $item['contact-id'] = Contact::getIdForURL($activity['author'], $receiver, true);
528 if (($receiver != 0) && empty($item['contact-id'])) {
529 $item['contact-id'] = Contact::getIdForURL($activity['author'], 0, true);
532 if (!empty($activity['directmessage'])) {
533 self::postMail($activity, $item);
537 if (DI::pConfig()->get($receiver, 'system', 'accept_only_sharer', false) && ($receiver != 0) && ($item['gravity'] == GRAVITY_PARENT)) {
538 $skip = !Contact::isSharingByURL($activity['author'], $receiver);
540 if ($skip && (($activity['type'] == 'as:Announce') || $isForum)) {
541 $skip = !Contact::isSharingByURL($activity['actor'], $receiver);
545 Logger::info('Skipping post', ['uid' => $receiver, 'url' => $item['uri']]);
549 Logger::info('Accepting post', ['uid' => $receiver, 'url' => $item['uri']]);
552 if (($item['gravity'] != GRAVITY_ACTIVITY) && ($activity['object_type'] == 'as:Event')) {
553 self::createEvent($activity, $item);
556 $item_id = Item::insert($item);
558 Logger::info('Item insertion successful', ['user' => $item['uid'], 'item_id' => $item_id]);
560 Logger::notice('Item insertion aborted', ['user' => $item['uid']]);
563 if ($item['uid'] == 0) {
568 // Store send a follow request for every reshare - but only when the item had been stored
569 if ($stored && ($item['private'] != Item::PRIVATE) && ($item['gravity'] == GRAVITY_PARENT) && ($item['author-link'] != $item['owner-link'])) {
570 $author = APContact::getByURL($item['owner-link'], false);
571 // We send automatic follow requests for reshared messages. (We don't need though for forum posts)
572 if ($author['type'] != 'Group') {
573 Logger::log('Send follow request for ' . $item['uri'] . ' (' . $stored . ') to ' . $item['author-link'], Logger::DEBUG);
574 ActivityPub\Transmitter::sendFollowObject($item['uri'], $item['author-link']);
579 private static function storeTags(int $uriid, array $tags = null)
581 // Make sure to delete all existing tags (can happen when called via the update functionality)
582 DBA::delete('tag', ['uri-id' => $uriid]);
584 foreach ($tags as $tag) {
585 if (empty($tag['name']) || empty($tag['type']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
589 $fields = ['uri-id' => $uriid, 'name' => $tag['name']];
591 if ($tag['type'] == 'Mention') {
592 $fields['type'] = Term::MENTION;
594 if (substr($fields['name'], 0, 1) == Term::TAG_CHARACTER[Term::MENTION]) {
595 $fields['name'] = substr($fields['name'], 1);
596 } elseif (substr($fields['name'], 0, 1) == Term::TAG_CHARACTER[Term::EXCLUSIVE_MENTION]) {
597 $fields['type'] = Term::EXCLUSIVE_MENTION;
598 $fields['name'] = substr($fields['name'], 1);
599 } elseif (substr($fields['name'], 0, 1) == Term::TAG_CHARACTER[Term::IMPLICIT_MENTION]) {
600 $fields['type'] = Term::IMPLICIT_MENTION;
601 $fields['name'] = substr($fields['name'], 1);
603 } elseif ($tag['type'] == 'Hashtag') {
604 $fields['type'] = Term::HASHTAG;
605 if (substr($fields['name'], 0, 1) == Term::TAG_CHARACTER[Term::HASHTAG]) {
606 $fields['name'] = substr($fields['name'], 1);
610 if (empty($fields['name'])) {
613 $fields['name'] = substr($fields['name'], 0, 64);
616 if (!empty($tag['href'] && ($tag['href'] != $tag['name']))) {
617 $fields['url'] = $tag['href'];
620 DBA::insert('tag', $fields, true);
622 Logger::info('Stored tag/mention', ['uriid' => $uriid, 'tag' => $tag, 'fields' => $fields]);
627 * Creates an mail post
629 * @param array $activity Activity data
630 * @param array $item item array
631 * @return int|bool New mail table row id or false on error
632 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
634 private static function postMail($activity, $item)
636 if (($item['gravity'] != GRAVITY_PARENT) && !DBA::exists('mail', ['uri' => $item['thr-parent'], 'uid' => $item['uid']])) {
637 Logger::info('Parent not found, mail will be discarded.', ['uid' => $item['uid'], 'uri' => $item['thr-parent']]);
641 Logger::info('Direct Message', $item);
644 $msg['uid'] = $item['uid'];
646 $msg['contact-id'] = $item['contact-id'];
648 $contact = Contact::getById($item['contact-id'], ['name', 'url', 'photo']);
649 $msg['from-name'] = $contact['name'];
650 $msg['from-url'] = $contact['url'];
651 $msg['from-photo'] = $contact['photo'];
653 $msg['uri'] = $item['uri'];
654 $msg['created'] = $item['created'];
656 $parent = DBA::selectFirst('mail', ['parent-uri', 'title'], ['uri' => $item['thr-parent']]);
657 if (DBA::isResult($parent)) {
658 $msg['parent-uri'] = $parent['parent-uri'];
659 $msg['title'] = $parent['title'];
661 $msg['parent-uri'] = $item['thr-parent'];
663 if (!empty($item['title'])) {
664 $msg['title'] = $item['title'];
665 } elseif (!empty($item['content-warning'])) {
666 $msg['title'] = $item['content-warning'];
668 // Trying to generate a title out of the body
669 $title = $item['body'];
671 while (preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $title, $matches)) {
672 $title = $matches[3];
675 $title = trim(HTML::toPlaintext(BBCode::convert($title, false, 2, true), 0));
677 if (strlen($title) > 20) {
678 $title = substr($title, 0, 20) . '...';
681 $msg['title'] = $title;
684 $msg['body'] = $item['body'];
686 return Mail::insert($msg);
690 * Fetches missing posts
692 * @param string $url message URL
693 * @param array $child activity array with the child of this message
694 * @return string fetched message URL
695 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
697 public static function fetchMissingActivity($url, $child = [])
699 if (!empty($child['receiver'])) {
700 $uid = ActivityPub\Receiver::getFirstUserFromReceivers($child['receiver']);
705 $object = ActivityPub::fetchContent($url, $uid);
706 if (empty($object)) {
707 Logger::log('Activity ' . $url . ' was not fetchable, aborting.');
711 if (empty($object['id'])) {
712 Logger::log('Activity ' . $url . ' has got not id, aborting. ' . json_encode($object));
716 if (!empty($child['author'])) {
717 $actor = $child['author'];
718 } elseif (!empty($object['actor'])) {
719 $actor = $object['actor'];
720 } elseif (!empty($object['attributedTo'])) {
721 $actor = $object['attributedTo'];
727 if (!empty($object['published'])) {
728 $published = $object['published'];
729 } elseif (!empty($child['published'])) {
730 $published = $child['published'];
732 $published = DateTimeFormat::utcNow();
736 $activity['@context'] = $object['@context'];
737 unset($object['@context']);
738 $activity['id'] = $object['id'];
739 $activity['to'] = $object['to'] ?? [];
740 $activity['cc'] = $object['cc'] ?? [];
741 $activity['actor'] = $actor;
742 $activity['object'] = $object;
743 $activity['published'] = $published;
744 $activity['type'] = 'Create';
746 $ldactivity = JsonLD::compact($activity);
748 $ldactivity['thread-completion'] = true;
750 ActivityPub\Receiver::processActivity($ldactivity, json_encode($activity));
752 Logger::notice('Activity had been fetched and processed.', ['url' => $url, 'object' => $activity['id']]);
754 return $activity['id'];
758 * perform a "follow" request
760 * @param array $activity
761 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
762 * @throws \ImagickException
764 public static function followUser($activity)
766 $uid = User::getIdForURL($activity['object_id']);
771 $owner = User::getOwnerDataById($uid);
773 $cid = Contact::getIdForURL($activity['actor'], $uid);
775 self::switchContact($cid);
776 DBA::update('contact', ['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
777 $contact = DBA::selectFirst('contact', [], ['id' => $cid, 'network' => Protocol::NATIVE_SUPPORT]);
782 $item = ['author-id' => Contact::getIdForURL($activity['actor']),
783 'author-link' => $activity['actor']];
785 $note = Strings::escapeTags(trim($activity['content'] ?? ''));
787 // Ensure that the contact has got the right network type
788 self::switchContact($item['author-id']);
790 $result = Contact::addRelationship($owner, $contact, $item, false, $note);
791 if ($result === true) {
792 ActivityPub\Transmitter::sendContactAccept($item['author-link'], $item['author-id'], $owner['uid']);
795 $cid = Contact::getIdForURL($activity['actor'], $uid);
800 if (empty($contact)) {
801 DBA::update('contact', ['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
804 Logger::log('Follow user ' . $uid . ' from contact ' . $cid . ' with id ' . $activity['id']);
808 * Update the given profile
810 * @param array $activity
813 public static function updatePerson($activity)
815 if (empty($activity['object_id'])) {
819 Logger::log('Updating profile for ' . $activity['object_id'], Logger::DEBUG);
820 Contact::updateFromProbeByURL($activity['object_id'], true);
824 * Delete the given profile
826 * @param array $activity
827 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
829 public static function deletePerson($activity)
831 if (empty($activity['object_id']) || empty($activity['actor'])) {
832 Logger::log('Empty object id or actor.', Logger::DEBUG);
836 if ($activity['object_id'] != $activity['actor']) {
837 Logger::log('Object id does not match actor.', Logger::DEBUG);
841 $contacts = DBA::select('contact', ['id'], ['nurl' => Strings::normaliseLink($activity['object_id'])]);
842 while ($contact = DBA::fetch($contacts)) {
843 Contact::remove($contact['id']);
845 DBA::close($contacts);
847 Logger::log('Deleted contact ' . $activity['object_id'], Logger::DEBUG);
851 * Accept a follow request
853 * @param array $activity
854 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
855 * @throws \ImagickException
857 public static function acceptFollowUser($activity)
859 $uid = User::getIdForURL($activity['object_actor']);
864 $cid = Contact::getIdForURL($activity['actor'], $uid);
866 Logger::log('No contact found for ' . $activity['actor'], Logger::DEBUG);
870 self::switchContact($cid);
872 $fields = ['pending' => false];
874 $contact = DBA::selectFirst('contact', ['rel'], ['id' => $cid]);
875 if ($contact['rel'] == Contact::FOLLOWER) {
876 $fields['rel'] = Contact::FRIEND;
879 $condition = ['id' => $cid];
880 DBA::update('contact', $fields, $condition);
881 Logger::log('Accept contact request from contact ' . $cid . ' for user ' . $uid, Logger::DEBUG);
885 * Reject a follow request
887 * @param array $activity
888 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
889 * @throws \ImagickException
891 public static function rejectFollowUser($activity)
893 $uid = User::getIdForURL($activity['object_actor']);
898 $cid = Contact::getIdForURL($activity['actor'], $uid);
900 Logger::log('No contact found for ' . $activity['actor'], Logger::DEBUG);
904 self::switchContact($cid);
906 if (DBA::exists('contact', ['id' => $cid, 'rel' => Contact::SHARING])) {
907 Contact::remove($cid);
908 Logger::log('Rejected contact request from contact ' . $cid . ' for user ' . $uid . ' - contact had been removed.', Logger::DEBUG);
910 Logger::log('Rejected contact request from contact ' . $cid . ' for user ' . $uid . '.', Logger::DEBUG);
915 * Undo activity like "like" or "dislike"
917 * @param array $activity
918 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
919 * @throws \ImagickException
921 public static function undoActivity($activity)
923 if (empty($activity['object_id'])) {
927 if (empty($activity['object_actor'])) {
931 $author_id = Contact::getIdForURL($activity['object_actor']);
932 if (empty($author_id)) {
936 Item::markForDeletion(['uri' => $activity['object_id'], 'author-id' => $author_id, 'gravity' => GRAVITY_ACTIVITY]);
940 * Activity to remove a follower
942 * @param array $activity
943 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
944 * @throws \ImagickException
946 public static function undoFollowUser($activity)
948 $uid = User::getIdForURL($activity['object_object']);
953 $owner = User::getOwnerDataById($uid);
955 $cid = Contact::getIdForURL($activity['actor'], $uid);
957 Logger::log('No contact found for ' . $activity['actor'], Logger::DEBUG);
961 self::switchContact($cid);
963 $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
964 if (!DBA::isResult($contact)) {
968 Contact::removeFollower($owner, $contact);
969 Logger::log('Undo following request from contact ' . $cid . ' for user ' . $uid, Logger::DEBUG);
973 * Switches a contact to AP if needed
975 * @param integer $cid Contact ID
978 private static function switchContact($cid)
980 $contact = DBA::selectFirst('contact', ['network', 'url'], ['id' => $cid]);
981 if (!DBA::isResult($contact) || in_array($contact['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN]) || Contact::isLocal($contact['url'])) {
985 Logger::info('Change existing contact', ['cid' => $cid, 'previous' => $contact['network']]);
986 Contact::updateFromProbe($cid);
990 * Collects implicit mentions like:
991 * - the author of the parent item
992 * - all the mentioned conversants in the parent item
994 * @param array $parent Item array with at least ['id', 'author-link', 'alias']
996 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
998 private static function getImplicitMentionList(array $parent)
1000 if (DI::config()->get('system', 'disable_implicit_mentions')) {
1004 $parent_terms = Term::tagArrayFromItemId($parent['id'], [Term::MENTION, Term::IMPLICIT_MENTION]);
1006 $parent_author = Contact::getDetailsByURL($parent['author-link'], 0);
1008 $implicit_mentions = [];
1009 if (empty($parent_author)) {
1010 Logger::notice('Author public contact unknown.', ['author-link' => $parent['author-link'], 'item-id' => $parent['id']]);
1012 $implicit_mentions[] = $parent_author['url'];
1013 $implicit_mentions[] = $parent_author['nurl'];
1014 $implicit_mentions[] = $parent_author['alias'];
1017 if (!empty($parent['alias'])) {
1018 $implicit_mentions[] = $parent['alias'];
1021 foreach ($parent_terms as $term) {
1022 $contact = Contact::getDetailsByURL($term['url'], 0);
1023 if (!empty($contact)) {
1024 $implicit_mentions[] = $contact['url'];
1025 $implicit_mentions[] = $contact['nurl'];
1026 $implicit_mentions[] = $contact['alias'];
1030 return $implicit_mentions;
1034 * Strips from the body prepended implicit mentions
1036 * @param string $body
1037 * @param array $potential_mentions
1040 private static function removeImplicitMentionsFromBody($body, array $potential_mentions)
1042 if (DI::config()->get('system', 'disable_implicit_mentions')) {
1046 $kept_mentions = [];
1048 // Extract one prepended mention at a time from the body
1049 while(preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $body, $matches)) {
1050 if (!in_array($matches[2], $potential_mentions)) {
1051 $kept_mentions[] = $matches[1];
1054 $body = $matches[3];
1057 // Re-appending the kept mentions to the body after extraction
1058 $kept_mentions[] = $body;
1060 return implode('', $kept_mentions);
1063 private static function convertImplicitMentionsInTags($activity_tags, array $potential_mentions)
1065 if (DI::config()->get('system', 'disable_implicit_mentions')) {
1066 return $activity_tags;
1069 foreach ($activity_tags as $index => $tag) {
1070 if (in_array($tag['href'], $potential_mentions)) {
1071 $activity_tags[$index]['name'] = preg_replace(
1072 '/' . preg_quote(Term::TAG_CHARACTER[Term::MENTION], '/') . '/',
1073 Term::TAG_CHARACTER[Term::IMPLICIT_MENTION],
1074 $activity_tags[$index]['name'],
1080 return $activity_tags;