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('No existing item, item will be created', ['uri' => $activity['id']]);
177 self::createItem($activity);
181 $item['changed'] = DateTimeFormat::utcNow();
182 $item['edited'] = DateTimeFormat::utc($activity['updated']);
184 $item = self::processContent($activity, $item);
189 Item::update($item, ['uri' => $activity['id']]);
193 * Prepares data for a message
195 * @param array $activity Activity array
196 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
197 * @throws \ImagickException
199 public static function createItem($activity)
202 $item['verb'] = Activity::POST;
203 $item['thr-parent'] = $activity['reply-to-id'];
205 if ($activity['reply-to-id'] == $activity['id']) {
206 $item['gravity'] = GRAVITY_PARENT;
207 $item['object-type'] = Activity\ObjectType::NOTE;
209 $item['gravity'] = GRAVITY_COMMENT;
210 $item['object-type'] = Activity\ObjectType::COMMENT;
212 // Ensure that the comment reaches all receivers of the referring post
213 $activity['receiver'] = self::addReceivers($activity);
216 if (empty($activity['directmessage']) && ($activity['id'] != $activity['reply-to-id']) && !Item::exists(['uri' => $activity['reply-to-id']])) {
217 Logger::notice('Parent not found. Try to refetch it.', ['parent' => $activity['reply-to-id']]);
218 self::fetchMissingActivity($activity['reply-to-id'], $activity);
221 $item['diaspora_signed_text'] = $activity['diaspora:comment'] ?? '';
223 self::postItem($activity, $item);
229 * @param array $activity
230 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
231 * @throws \ImagickException
233 public static function deleteItem($activity)
235 $owner = Contact::getIdForURL($activity['actor']);
237 Logger::log('Deleting item ' . $activity['object_id'] . ' from ' . $owner, Logger::DEBUG);
238 Item::markForDeletion(['uri' => $activity['object_id'], 'owner-id' => $owner]);
242 * Prepare the item array for an activity
244 * @param array $activity Activity array
245 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
246 * @throws \ImagickException
248 public static function addTag($activity)
250 if (empty($activity['object_content']) || empty($activity['object_id'])) {
254 foreach ($activity['receiver'] as $receiver) {
255 $item = Item::selectFirst(['id', 'uri-id', 'tag', 'origin', 'author-link'], ['uri' => $activity['target_id'], 'uid' => $receiver]);
256 if (!DBA::isResult($item)) {
257 // We don't fetch missing content for this purpose
261 if (($item['author-link'] != $activity['actor']) && !$item['origin']) {
262 Logger::info('Not origin, not from the author, skipping update', ['id' => $item['id'], 'author' => $item['author-link'], 'actor' => $activity['actor']]);
266 Tag::store($item['uri-id'], Tag::HASHTAG, $activity['object_content'], $activity['object_id']);
269 // - Check if "blocktag" is set
270 // - Check if actor is a contact
272 if (!stristr($item['tag'], trim($activity['object_content']))) {
273 $tag = $item['tag'] . (strlen($item['tag']) ? ',' : '') . '#[url=' . $activity['object_id'] . ']'. $activity['object_content'] . '[/url]';
274 Item::update(['tag' => $tag], ['id' => $item['id']]);
275 Logger::info('Tagged item', ['id' => $item['id'], 'tag' => $activity['object_content'], 'uri' => $activity['target_id'], 'actor' => $activity['actor']]);
281 * Add users to the receiver list of the given public activity.
282 * This is used to ensure that the activity will be stored in every thread.
284 * @param array $activity Activity array
285 * @return array Modified receiver list
287 private static function addReceivers(array $activity)
289 if (!in_array(0, $activity['receiver'])) {
290 // Private activities will not be modified
291 return $activity['receiver'];
294 // Add all owners of the referring item to the receivers
295 $original = $receivers = $activity['receiver'];
296 $items = Item::select(['uid'], ['uri' => $activity['object_id']]);
297 while ($item = DBA::fetch($items)) {
298 $receivers['uid:' . $item['uid']] = $item['uid'];
302 if (count($original) != count($receivers)) {
303 Logger::info('Improved data', ['id' => $activity['id'], 'object' => $activity['object_id'], 'original' => $original, 'improved' => $receivers]);
310 * Prepare the item array for an activity
312 * @param array $activity Activity array
313 * @param string $verb Activity verb
314 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
315 * @throws \ImagickException
317 public static function createActivity($activity, $verb)
320 $item['verb'] = $verb;
321 $item['thr-parent'] = $activity['object_id'];
322 $item['gravity'] = GRAVITY_ACTIVITY;
323 $item['object-type'] = Activity\ObjectType::NOTE;
325 $item['diaspora_signed_text'] = $activity['diaspora:like'] ?? '';
327 $activity['receiver'] = self::addReceivers($activity);
329 self::postItem($activity, $item);
335 * @param array $activity Activity array
339 public static function createEvent($activity, $item)
341 $event['summary'] = HTML::toBBCode($activity['name']);
342 $event['desc'] = HTML::toBBCode($activity['content']);
343 $event['start'] = $activity['start-time'];
344 $event['finish'] = $activity['end-time'];
345 $event['nofinish'] = empty($event['finish']);
346 $event['location'] = $activity['location'];
347 $event['adjust'] = true;
348 $event['cid'] = $item['contact-id'];
349 $event['uid'] = $item['uid'];
350 $event['uri'] = $item['uri'];
351 $event['edited'] = $item['edited'];
352 $event['private'] = $item['private'];
353 $event['guid'] = $item['guid'];
354 $event['plink'] = $item['plink'];
356 $condition = ['uri' => $item['uri'], 'uid' => $item['uid']];
357 $ev = DBA::selectFirst('event', ['id'], $condition);
358 if (DBA::isResult($ev)) {
359 $event['id'] = $ev['id'];
362 $event_id = Event::store($event);
363 Logger::log('Event '.$event_id.' was stored', Logger::DEBUG);
367 * Process the content
369 * @param array $activity Activity array
371 * @return array|bool Returns the item array or false if there was an unexpected occurrence
374 private static function processContent($activity, $item)
376 $item['title'] = HTML::toBBCode($activity['name']);
378 if (!empty($activity['source'])) {
379 $item['body'] = $activity['source'];
381 $content = HTML::toBBCode($activity['content']);
383 if (!empty($activity['emojis'])) {
384 $content = self::replaceEmojis($content, $activity['emojis']);
387 $content = self::convertMentions($content);
389 if (empty($activity['directmessage']) && ($item['thr-parent'] != $item['uri']) && ($item['gravity'] == GRAVITY_COMMENT)) {
390 $item_private = !in_array(0, $activity['item_receiver']);
391 $parent = Item::selectFirst(['id', 'private', 'author-link', 'alias'], ['uri' => $item['thr-parent']]);
392 if (!DBA::isResult($parent)) {
393 Logger::warning('Unknown parent item.', ['uri' => $item['thr-parent']]);
396 if ($item_private && ($parent['private'] == Item::PRIVATE)) {
397 Logger::warning('Item is private but the parent is not. Dropping.', ['item-uri' => $item['uri'], 'thr-parent' => $item['thr-parent']]);
401 $potential_implicit_mentions = self::getImplicitMentionList($parent);
402 $content = self::removeImplicitMentionsFromBody($content, $potential_implicit_mentions);
403 $activity['tags'] = self::convertImplicitMentionsInTags($activity['tags'], $potential_implicit_mentions);
405 $item['content-warning'] = HTML::toBBCode($activity['summary']);
406 $item['body'] = $content;
409 $item['tag'] = self::constructTagString($activity['tags'], $activity['sensitive']);
411 self::storeFromBody($item);
412 self::storeTags($item['uri-id'], $activity['tags']);
414 $item['location'] = $activity['location'];
416 if (!empty($item['latitude']) && !empty($item['longitude'])) {
417 $item['coord'] = $item['latitude'] . ' ' . $item['longitude'];
420 $item['app'] = $activity['generator'];
426 * Store hashtags and mentions
430 private static function storeFromBody(array $item)
432 // Make sure to delete all existing tags (can happen when called via the update functionality)
433 DBA::delete('post-tag', ['uri-id' => $item['uri-id']]);
435 Tag::storeFromBody($item['uri-id'], $item['body'], '@!');
439 * Generate a GUID out of an URL
441 * @param string $url message URL
442 * @return string with GUID
444 private static function getGUIDByURL(string $url)
446 $parsed = parse_url($url);
448 $host_hash = hash('crc32', $parsed['host']);
450 unset($parsed["scheme"]);
451 unset($parsed["host"]);
453 $path = implode("/", $parsed);
455 return $host_hash . '-'. hash('fnv164', $path) . '-'. hash('joaat', $path);
459 * Creates an item post
461 * @param array $activity Activity data
462 * @param array $item item array
463 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
464 * @throws \ImagickException
466 private static function postItem($activity, $item)
468 /// @todo What to do with $activity['context']?
469 if (empty($activity['directmessage']) && ($item['gravity'] != GRAVITY_PARENT) && !Item::exists(['uri' => $item['thr-parent']])) {
470 Logger::info('Parent not found, message will be discarded.', ['thr-parent' => $item['thr-parent']]);
474 $item['network'] = Protocol::ACTIVITYPUB;
475 $item['author-link'] = $activity['author'];
476 $item['author-id'] = Contact::getIdForURL($activity['author'], 0, true);
477 $item['owner-link'] = $activity['actor'];
478 $item['owner-id'] = Contact::getIdForURL($activity['actor'], 0, true);
480 if (in_array(0, $activity['receiver']) && !empty($activity['unlisted'])) {
481 $item['private'] = Item::UNLISTED;
482 } elseif (in_array(0, $activity['receiver'])) {
483 $item['private'] = Item::PUBLIC;
485 $item['private'] = Item::PRIVATE;
488 if (!empty($activity['raw'])) {
489 $item['source'] = $activity['raw'];
490 $item['protocol'] = Conversation::PARCEL_ACTIVITYPUB;
491 $item['conversation-href'] = $activity['context'] ?? '';
492 $item['conversation-uri'] = $activity['conversation'] ?? '';
494 if (isset($activity['push'])) {
495 $item['direction'] = $activity['push'] ? Conversation::PUSH : Conversation::PULL;
501 if (!empty($activity['thread-completion'])) {
502 // Store the original actor in the "causer" fields to enable the check for ignored or blocked contacts
503 $item['causer-link'] = $item['owner-link'];
504 $item['causer-id'] = $item['owner-id'];
506 Logger::info('Ignoring actor because of thread completion.', ['actor' => $item['owner-link']]);
507 $item['owner-link'] = $item['author-link'];
508 $item['owner-id'] = $item['author-id'];
510 $actor = APContact::getByURL($item['owner-link'], false);
511 $isForum = ($actor['type'] == 'Group');
514 $item['uri'] = $activity['id'];
516 $item['created'] = DateTimeFormat::utc($activity['published']);
517 $item['edited'] = DateTimeFormat::utc($activity['updated']);
518 $item['guid'] = $activity['diaspora:guid'] ?: $activity['sc:identifier'] ?: self::getGUIDByURL($item['uri']);
520 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
522 $item = self::processContent($activity, $item);
527 $item['plink'] = $activity['alternate-url'] ?? $item['uri'];
529 $item = self::constructAttachList($activity, $item);
533 foreach ($activity['receiver'] as $receiver) {
534 if ($receiver == -1) {
538 $item['uid'] = $receiver;
541 $item['contact-id'] = Contact::getIdForURL($activity['actor'], $receiver, true);
543 $item['contact-id'] = Contact::getIdForURL($activity['author'], $receiver, true);
546 if (($receiver != 0) && empty($item['contact-id'])) {
547 $item['contact-id'] = Contact::getIdForURL($activity['author'], 0, true);
550 if (!empty($activity['directmessage'])) {
551 self::postMail($activity, $item);
555 if (DI::pConfig()->get($receiver, 'system', 'accept_only_sharer', false) && ($receiver != 0) && ($item['gravity'] == GRAVITY_PARENT)) {
556 $skip = !Contact::isSharingByURL($activity['author'], $receiver);
558 if ($skip && (($activity['type'] == 'as:Announce') || $isForum)) {
559 $skip = !Contact::isSharingByURL($activity['actor'], $receiver);
563 Logger::info('Skipping post', ['uid' => $receiver, 'url' => $item['uri']]);
567 Logger::info('Accepting post', ['uid' => $receiver, 'url' => $item['uri']]);
570 if (($item['gravity'] != GRAVITY_ACTIVITY) && ($activity['object_type'] == 'as:Event')) {
571 self::createEvent($activity, $item);
574 $item_id = Item::insert($item);
576 Logger::info('Item insertion successful', ['user' => $item['uid'], 'item_id' => $item_id]);
578 Logger::notice('Item insertion aborted', ['user' => $item['uid']]);
581 if ($item['uid'] == 0) {
586 // Store send a follow request for every reshare - but only when the item had been stored
587 if ($stored && ($item['private'] != Item::PRIVATE) && ($item['gravity'] == GRAVITY_PARENT) && ($item['author-link'] != $item['owner-link'])) {
588 $author = APContact::getByURL($item['owner-link'], false);
589 // We send automatic follow requests for reshared messages. (We don't need though for forum posts)
590 if ($author['type'] != 'Group') {
591 Logger::log('Send follow request for ' . $item['uri'] . ' (' . $stored . ') to ' . $item['author-link'], Logger::DEBUG);
592 ActivityPub\Transmitter::sendFollowObject($item['uri'], $item['author-link']);
598 * Store tags and mentions into the tag table
600 * @param integer $uriid
603 private static function storeTags(int $uriid, array $tags = null)
605 foreach ($tags as $tag) {
606 if (empty($tag['name']) || empty($tag['type']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
610 $hash = substr($tag['name'], 0, 1);
612 if ($tag['type'] == 'Mention') {
613 if (in_array($hash, [Tag::TAG_CHARACTER[Tag::MENTION],
614 Tag::TAG_CHARACTER[Tag::EXCLUSIVE_MENTION],
615 Tag::TAG_CHARACTER[Tag::IMPLICIT_MENTION]])) {
616 $tag['name'] = substr($tag['name'], 1);
618 $type = Tag::IMPLICIT_MENTION;
620 if (!empty($tag['href'])) {
621 $apcontact = APContact::getByURL($tag['href']);
622 if (!empty($apcontact['name']) || !empty($apcontact['nick'])) {
623 $tag['name'] = $apcontact['name'] ?: $apcontact['nick'];
626 } elseif ($tag['type'] == 'Hashtag') {
627 if ($hash == Tag::TAG_CHARACTER[Tag::HASHTAG]) {
628 $tag['name'] = substr($tag['name'], 1);
630 $type = Tag::HASHTAG;
633 if (empty($tag['name'])) {
637 Tag::store($uriid, $type, $tag['name'], $tag['href']);
642 * Creates an mail post
644 * @param array $activity Activity data
645 * @param array $item item array
646 * @return int|bool New mail table row id or false on error
647 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
649 private static function postMail($activity, $item)
651 if (($item['gravity'] != GRAVITY_PARENT) && !DBA::exists('mail', ['uri' => $item['thr-parent'], 'uid' => $item['uid']])) {
652 Logger::info('Parent not found, mail will be discarded.', ['uid' => $item['uid'], 'uri' => $item['thr-parent']]);
656 Logger::info('Direct Message', $item);
659 $msg['uid'] = $item['uid'];
661 $msg['contact-id'] = $item['contact-id'];
663 $contact = Contact::getById($item['contact-id'], ['name', 'url', 'photo']);
664 $msg['from-name'] = $contact['name'];
665 $msg['from-url'] = $contact['url'];
666 $msg['from-photo'] = $contact['photo'];
668 $msg['uri'] = $item['uri'];
669 $msg['created'] = $item['created'];
671 $parent = DBA::selectFirst('mail', ['parent-uri', 'title'], ['uri' => $item['thr-parent']]);
672 if (DBA::isResult($parent)) {
673 $msg['parent-uri'] = $parent['parent-uri'];
674 $msg['title'] = $parent['title'];
676 $msg['parent-uri'] = $item['thr-parent'];
678 if (!empty($item['title'])) {
679 $msg['title'] = $item['title'];
680 } elseif (!empty($item['content-warning'])) {
681 $msg['title'] = $item['content-warning'];
683 // Trying to generate a title out of the body
684 $title = $item['body'];
686 while (preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $title, $matches)) {
687 $title = $matches[3];
690 $title = trim(HTML::toPlaintext(BBCode::convert($title, false, 2, true), 0));
692 if (strlen($title) > 20) {
693 $title = substr($title, 0, 20) . '...';
696 $msg['title'] = $title;
699 $msg['body'] = $item['body'];
701 return Mail::insert($msg);
705 * Fetches missing posts
707 * @param string $url message URL
708 * @param array $child activity array with the child of this message
709 * @return string fetched message URL
710 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
712 public static function fetchMissingActivity($url, $child = [])
714 if (!empty($child['receiver'])) {
715 $uid = ActivityPub\Receiver::getFirstUserFromReceivers($child['receiver']);
720 $object = ActivityPub::fetchContent($url, $uid);
721 if (empty($object)) {
722 Logger::log('Activity ' . $url . ' was not fetchable, aborting.');
726 if (empty($object['id'])) {
727 Logger::log('Activity ' . $url . ' has got not id, aborting. ' . json_encode($object));
731 if (!empty($child['author'])) {
732 $actor = $child['author'];
733 } elseif (!empty($object['actor'])) {
734 $actor = $object['actor'];
735 } elseif (!empty($object['attributedTo'])) {
736 $actor = $object['attributedTo'];
742 if (!empty($object['published'])) {
743 $published = $object['published'];
744 } elseif (!empty($child['published'])) {
745 $published = $child['published'];
747 $published = DateTimeFormat::utcNow();
751 $activity['@context'] = $object['@context'];
752 unset($object['@context']);
753 $activity['id'] = $object['id'];
754 $activity['to'] = $object['to'] ?? [];
755 $activity['cc'] = $object['cc'] ?? [];
756 $activity['actor'] = $actor;
757 $activity['object'] = $object;
758 $activity['published'] = $published;
759 $activity['type'] = 'Create';
761 $ldactivity = JsonLD::compact($activity);
763 $ldactivity['thread-completion'] = true;
765 ActivityPub\Receiver::processActivity($ldactivity, json_encode($activity));
767 Logger::notice('Activity had been fetched and processed.', ['url' => $url, 'object' => $activity['id']]);
769 return $activity['id'];
773 * perform a "follow" request
775 * @param array $activity
776 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
777 * @throws \ImagickException
779 public static function followUser($activity)
781 $uid = User::getIdForURL($activity['object_id']);
786 $owner = User::getOwnerDataById($uid);
788 $cid = Contact::getIdForURL($activity['actor'], $uid);
790 self::switchContact($cid);
791 DBA::update('contact', ['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
792 $contact = DBA::selectFirst('contact', [], ['id' => $cid, 'network' => Protocol::NATIVE_SUPPORT]);
797 $item = ['author-id' => Contact::getIdForURL($activity['actor']),
798 'author-link' => $activity['actor']];
800 $note = Strings::escapeTags(trim($activity['content'] ?? ''));
802 // Ensure that the contact has got the right network type
803 self::switchContact($item['author-id']);
805 $result = Contact::addRelationship($owner, $contact, $item, false, $note);
806 if ($result === true) {
807 ActivityPub\Transmitter::sendContactAccept($item['author-link'], $item['author-id'], $owner['uid']);
810 $cid = Contact::getIdForURL($activity['actor'], $uid);
815 if (empty($contact)) {
816 DBA::update('contact', ['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
819 Logger::log('Follow user ' . $uid . ' from contact ' . $cid . ' with id ' . $activity['id']);
823 * Update the given profile
825 * @param array $activity
828 public static function updatePerson($activity)
830 if (empty($activity['object_id'])) {
834 Logger::log('Updating profile for ' . $activity['object_id'], Logger::DEBUG);
835 Contact::updateFromProbeByURL($activity['object_id'], true);
839 * Delete the given profile
841 * @param array $activity
842 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
844 public static function deletePerson($activity)
846 if (empty($activity['object_id']) || empty($activity['actor'])) {
847 Logger::log('Empty object id or actor.', Logger::DEBUG);
851 if ($activity['object_id'] != $activity['actor']) {
852 Logger::log('Object id does not match actor.', Logger::DEBUG);
856 $contacts = DBA::select('contact', ['id'], ['nurl' => Strings::normaliseLink($activity['object_id'])]);
857 while ($contact = DBA::fetch($contacts)) {
858 Contact::remove($contact['id']);
860 DBA::close($contacts);
862 Logger::log('Deleted contact ' . $activity['object_id'], Logger::DEBUG);
866 * Accept a follow request
868 * @param array $activity
869 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
870 * @throws \ImagickException
872 public static function acceptFollowUser($activity)
874 $uid = User::getIdForURL($activity['object_actor']);
879 $cid = Contact::getIdForURL($activity['actor'], $uid);
881 Logger::log('No contact found for ' . $activity['actor'], Logger::DEBUG);
885 self::switchContact($cid);
887 $fields = ['pending' => false];
889 $contact = DBA::selectFirst('contact', ['rel'], ['id' => $cid]);
890 if ($contact['rel'] == Contact::FOLLOWER) {
891 $fields['rel'] = Contact::FRIEND;
894 $condition = ['id' => $cid];
895 DBA::update('contact', $fields, $condition);
896 Logger::log('Accept contact request from contact ' . $cid . ' for user ' . $uid, Logger::DEBUG);
900 * Reject a follow request
902 * @param array $activity
903 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
904 * @throws \ImagickException
906 public static function rejectFollowUser($activity)
908 $uid = User::getIdForURL($activity['object_actor']);
913 $cid = Contact::getIdForURL($activity['actor'], $uid);
915 Logger::log('No contact found for ' . $activity['actor'], Logger::DEBUG);
919 self::switchContact($cid);
921 if (DBA::exists('contact', ['id' => $cid, 'rel' => Contact::SHARING])) {
922 Contact::remove($cid);
923 Logger::log('Rejected contact request from contact ' . $cid . ' for user ' . $uid . ' - contact had been removed.', Logger::DEBUG);
925 Logger::log('Rejected contact request from contact ' . $cid . ' for user ' . $uid . '.', Logger::DEBUG);
930 * Undo activity like "like" or "dislike"
932 * @param array $activity
933 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
934 * @throws \ImagickException
936 public static function undoActivity($activity)
938 if (empty($activity['object_id'])) {
942 if (empty($activity['object_actor'])) {
946 $author_id = Contact::getIdForURL($activity['object_actor']);
947 if (empty($author_id)) {
951 Item::markForDeletion(['uri' => $activity['object_id'], 'author-id' => $author_id, 'gravity' => GRAVITY_ACTIVITY]);
955 * Activity to remove a follower
957 * @param array $activity
958 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
959 * @throws \ImagickException
961 public static function undoFollowUser($activity)
963 $uid = User::getIdForURL($activity['object_object']);
968 $owner = User::getOwnerDataById($uid);
970 $cid = Contact::getIdForURL($activity['actor'], $uid);
972 Logger::log('No contact found for ' . $activity['actor'], Logger::DEBUG);
976 self::switchContact($cid);
978 $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
979 if (!DBA::isResult($contact)) {
983 Contact::removeFollower($owner, $contact);
984 Logger::log('Undo following request from contact ' . $cid . ' for user ' . $uid, Logger::DEBUG);
988 * Switches a contact to AP if needed
990 * @param integer $cid Contact ID
993 private static function switchContact($cid)
995 $contact = DBA::selectFirst('contact', ['network', 'url'], ['id' => $cid]);
996 if (!DBA::isResult($contact) || in_array($contact['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN]) || Contact::isLocal($contact['url'])) {
1000 Logger::info('Change existing contact', ['cid' => $cid, 'previous' => $contact['network']]);
1001 Contact::updateFromProbe($cid);
1005 * Collects implicit mentions like:
1006 * - the author of the parent item
1007 * - all the mentioned conversants in the parent item
1009 * @param array $parent Item array with at least ['id', 'author-link', 'alias']
1011 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1013 private static function getImplicitMentionList(array $parent)
1015 if (DI::config()->get('system', 'disable_implicit_mentions')) {
1019 $parent_terms = Term::tagArrayFromItemId($parent['id'], [Term::MENTION, Term::IMPLICIT_MENTION]);
1021 $parent_author = Contact::getDetailsByURL($parent['author-link'], 0);
1023 $implicit_mentions = [];
1024 if (empty($parent_author)) {
1025 Logger::notice('Author public contact unknown.', ['author-link' => $parent['author-link'], 'item-id' => $parent['id']]);
1027 $implicit_mentions[] = $parent_author['url'];
1028 $implicit_mentions[] = $parent_author['nurl'];
1029 $implicit_mentions[] = $parent_author['alias'];
1032 if (!empty($parent['alias'])) {
1033 $implicit_mentions[] = $parent['alias'];
1036 foreach ($parent_terms as $term) {
1037 $contact = Contact::getDetailsByURL($term['url'], 0);
1038 if (!empty($contact)) {
1039 $implicit_mentions[] = $contact['url'];
1040 $implicit_mentions[] = $contact['nurl'];
1041 $implicit_mentions[] = $contact['alias'];
1045 return $implicit_mentions;
1049 * Strips from the body prepended implicit mentions
1051 * @param string $body
1052 * @param array $potential_mentions
1055 private static function removeImplicitMentionsFromBody($body, array $potential_mentions)
1057 if (DI::config()->get('system', 'disable_implicit_mentions')) {
1061 $kept_mentions = [];
1063 // Extract one prepended mention at a time from the body
1064 while(preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $body, $matches)) {
1065 if (!in_array($matches[2], $potential_mentions)) {
1066 $kept_mentions[] = $matches[1];
1069 $body = $matches[3];
1072 // Re-appending the kept mentions to the body after extraction
1073 $kept_mentions[] = $body;
1075 return implode('', $kept_mentions);
1078 private static function convertImplicitMentionsInTags($activity_tags, array $potential_mentions)
1080 if (DI::config()->get('system', 'disable_implicit_mentions')) {
1081 return $activity_tags;
1084 foreach ($activity_tags as $index => $tag) {
1085 if (in_array($tag['href'], $potential_mentions)) {
1086 $activity_tags[$index]['name'] = preg_replace(
1087 '/' . preg_quote(Term::TAG_CHARACTER[Term::MENTION], '/') . '/',
1088 Term::TAG_CHARACTER[Term::IMPLICIT_MENTION],
1089 $activity_tags[$index]['name'],
1095 return $activity_tags;