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\PageInfo;
25 use Friendica\Content\Text\BBCode;
26 use Friendica\Content\Text\HTML;
27 use Friendica\Core\Logger;
28 use Friendica\Core\Protocol;
29 use Friendica\Database\DBA;
31 use Friendica\Model\APContact;
32 use Friendica\Model\Contact;
33 use Friendica\Model\Conversation;
34 use Friendica\Model\Event;
35 use Friendica\Model\Item;
36 use Friendica\Model\ItemURI;
37 use Friendica\Model\Mail;
38 use Friendica\Model\Tag;
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 * Add attachment data to the item array
86 * @param array $activity
91 private static function constructAttachList($activity, $item)
93 if (empty($activity['attachments'])) {
97 foreach ($activity['attachments'] as $attach) {
98 switch ($attach['type']) {
101 'url' => $attach['url'],
102 'type' => $attach['type'],
103 'title' => $attach['title'] ?? '',
104 'text' => $attach['desc'] ?? '',
105 'image' => $attach['image'] ?? '',
109 $item['body'] = PageInfo::appendDataToBody($item['body'], $data);
112 $filetype = strtolower(substr($attach['mediaType'], 0, strpos($attach['mediaType'], '/')));
113 if ($filetype == 'image') {
114 if (!empty($activity['source']) && strpos($activity['source'], $attach['url'])) {
118 $item['body'] .= "\n";
120 // image is the preview/thumbnail URL
121 if (!empty($attach['image'])) {
122 $item['body'] .= '[url=' . $attach['url'] . ']';
123 $attach['url'] = $attach['image'];
126 if (empty($attach['name'])) {
127 $item['body'] .= '[img]' . $attach['url'] . '[/img]';
129 $item['body'] .= '[img=' . $attach['url'] . ']' . $attach['name'] . '[/img]';
132 if (!empty($attach['image'])) {
133 $item['body'] .= '[/url]';
135 } elseif ($filetype == 'audio') {
136 if (!empty($activity['source']) && strpos($activity['source'], $attach['url'])) {
140 $item['body'] .= "\n[audio]" . $attach['url'] . '[/audio]';
141 } elseif ($filetype == 'video') {
142 if (!empty($activity['source']) && strpos($activity['source'], $attach['url'])) {
146 $item['body'] .= "\n[video]" . $attach['url'] . '[/video]';
148 if (!empty($item["attach"])) {
149 $item["attach"] .= ',';
151 $item["attach"] = '';
154 $item["attach"] .= '[attach]href="' . $attach['url'] . '" length="' . ($attach['length'] ?? '0') . '" type="' . $attach['mediaType'] . '" title="' . ($attach['name'] ?? '') . '"[/attach]';
165 * @param array $activity Activity array
166 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
168 public static function updateItem($activity)
170 $item = Item::selectFirst(['uri', 'uri-id', 'thr-parent', 'gravity'], ['uri' => $activity['id']]);
171 if (!DBA::isResult($item)) {
172 Logger::warning('No existing item, item will be created', ['uri' => $activity['id']]);
173 $item = self::createItem($activity);
174 self::postItem($activity, $item);
178 $item['changed'] = DateTimeFormat::utcNow();
179 $item['edited'] = DateTimeFormat::utc($activity['updated']);
181 $item = self::processContent($activity, $item);
186 Item::update($item, ['uri' => $activity['id']]);
190 * Prepares data for a message
192 * @param array $activity Activity array
193 * @return array Internal item
194 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
195 * @throws \ImagickException
197 public static function createItem($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 /// @todo What to do with $activity['context']?
222 if (empty($activity['directmessage']) && ($item['gravity'] != GRAVITY_PARENT) && !Item::exists(['uri' => $item['thr-parent']])) {
223 Logger::info('Parent not found, message will be discarded.', ['thr-parent' => $item['thr-parent']]);
227 $item['network'] = Protocol::ACTIVITYPUB;
228 $item['author-link'] = $activity['author'];
229 $item['author-id'] = Contact::getIdForURL($activity['author']);
230 $item['owner-link'] = $activity['actor'];
231 $item['owner-id'] = Contact::getIdForURL($activity['actor']);
233 if (in_array(0, $activity['receiver']) && !empty($activity['unlisted'])) {
234 $item['private'] = Item::UNLISTED;
235 } elseif (in_array(0, $activity['receiver'])) {
236 $item['private'] = Item::PUBLIC;
238 $item['private'] = Item::PRIVATE;
241 if (!empty($activity['raw'])) {
242 $item['source'] = $activity['raw'];
243 $item['protocol'] = Conversation::PARCEL_ACTIVITYPUB;
244 $item['conversation-href'] = $activity['context'] ?? '';
245 $item['conversation-uri'] = $activity['conversation'] ?? '';
247 if (isset($activity['push'])) {
248 $item['direction'] = $activity['push'] ? Conversation::PUSH : Conversation::PULL;
252 $item['isForum'] = false;
254 if (!empty($activity['thread-completion'])) {
255 // Store the original actor in the "causer" fields to enable the check for ignored or blocked contacts
256 $item['causer-link'] = $item['owner-link'];
257 $item['causer-id'] = $item['owner-id'];
259 Logger::info('Ignoring actor because of thread completion.', ['actor' => $item['owner-link']]);
260 $item['owner-link'] = $item['author-link'];
261 $item['owner-id'] = $item['author-id'];
263 $actor = APContact::getByURL($item['owner-link'], false);
264 $item['isForum'] = ($actor['type'] == 'Group');
267 $item['uri'] = $activity['id'];
269 $item['created'] = DateTimeFormat::utc($activity['published']);
270 $item['edited'] = DateTimeFormat::utc($activity['updated']);
271 $guid = $activity['sc:identifier'] ?: self::getGUIDByURL($item['uri']);
272 $item['guid'] = $activity['diaspora:guid'] ?: $guid;
274 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
276 $item = self::processContent($activity, $item);
281 $item['plink'] = $activity['alternate-url'] ?? $item['uri'];
283 $item = self::constructAttachList($activity, $item);
291 * @param array $activity
292 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
293 * @throws \ImagickException
295 public static function deleteItem($activity)
297 $owner = Contact::getIdForURL($activity['actor']);
299 Logger::info('Deleting item', ['object' => $activity['object_id'], 'owner' => $owner]);
300 Item::markForDeletion(['uri' => $activity['object_id'], 'owner-id' => $owner]);
304 * Prepare the item array for an activity
306 * @param array $activity Activity array
307 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
308 * @throws \ImagickException
310 public static function addTag($activity)
312 if (empty($activity['object_content']) || empty($activity['object_id'])) {
316 foreach ($activity['receiver'] as $receiver) {
317 $item = Item::selectFirst(['id', 'uri-id', 'tag', 'origin', 'author-link'], ['uri' => $activity['target_id'], 'uid' => $receiver]);
318 if (!DBA::isResult($item)) {
319 // We don't fetch missing content for this purpose
323 if (($item['author-link'] != $activity['actor']) && !$item['origin']) {
324 Logger::info('Not origin, not from the author, skipping update', ['id' => $item['id'], 'author' => $item['author-link'], 'actor' => $activity['actor']]);
328 Tag::store($item['uri-id'], Tag::HASHTAG, $activity['object_content'], $activity['object_id']);
329 Logger::info('Tagged item', ['id' => $item['id'], 'tag' => $activity['object_content'], 'uri' => $activity['target_id'], 'actor' => $activity['actor']]);
334 * Add users to the receiver list of the given public activity.
335 * This is used to ensure that the activity will be stored in every thread.
337 * @param array $activity Activity array
338 * @return array Modified receiver list
340 private static function addReceivers(array $activity)
342 if (!in_array(0, $activity['receiver'])) {
343 // Private activities will not be modified
344 return $activity['receiver'];
347 // Add all owners of the referring item to the receivers
348 $original = $receivers = $activity['receiver'];
349 $items = Item::select(['uid'], ['uri' => $activity['object_id']]);
350 while ($item = DBA::fetch($items)) {
351 $receivers['uid:' . $item['uid']] = $item['uid'];
355 if (count($original) != count($receivers)) {
356 Logger::info('Improved data', ['id' => $activity['id'], 'object' => $activity['object_id'], 'original' => $original, 'improved' => $receivers]);
363 * Prepare the item array for an activity
365 * @param array $activity Activity array
366 * @param string $verb Activity verb
367 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
368 * @throws \ImagickException
370 public static function createActivity($activity, $verb)
372 $item = self::createItem($activity);
373 $item['verb'] = $verb;
374 $item['thr-parent'] = $activity['object_id'];
375 $item['gravity'] = GRAVITY_ACTIVITY;
376 $item['object-type'] = Activity\ObjectType::NOTE;
378 $item['diaspora_signed_text'] = $activity['diaspora:like'] ?? '';
380 $activity['receiver'] = self::addReceivers($activity);
382 self::postItem($activity, $item);
388 * @param array $activity Activity array
392 public static function createEvent($activity, $item)
394 $event['summary'] = HTML::toBBCode($activity['name']);
395 $event['desc'] = HTML::toBBCode($activity['content']);
396 $event['start'] = $activity['start-time'];
397 $event['finish'] = $activity['end-time'];
398 $event['nofinish'] = empty($event['finish']);
399 $event['location'] = $activity['location'];
400 $event['adjust'] = true;
401 $event['cid'] = $item['contact-id'];
402 $event['uid'] = $item['uid'];
403 $event['uri'] = $item['uri'];
404 $event['edited'] = $item['edited'];
405 $event['private'] = $item['private'];
406 $event['guid'] = $item['guid'];
407 $event['plink'] = $item['plink'];
409 $condition = ['uri' => $item['uri'], 'uid' => $item['uid']];
410 $ev = DBA::selectFirst('event', ['id'], $condition);
411 if (DBA::isResult($ev)) {
412 $event['id'] = $ev['id'];
415 $event_id = Event::store($event);
416 Logger::info('Event was stored', ['id' => $event_id]);
420 * Process the content
422 * @param array $activity Activity array
424 * @return array|bool Returns the item array or false if there was an unexpected occurrence
427 private static function processContent($activity, $item)
429 $item['title'] = HTML::toBBCode($activity['name']);
431 if (!empty($activity['source'])) {
432 $item['body'] = $activity['source'];
434 $content = HTML::toBBCode($activity['content']);
436 if (!empty($activity['emojis'])) {
437 $content = self::replaceEmojis($content, $activity['emojis']);
440 $content = self::convertMentions($content);
442 if (empty($activity['directmessage']) && ($item['thr-parent'] != $item['uri']) && ($item['gravity'] == GRAVITY_COMMENT)) {
443 $item_private = !in_array(0, $activity['item_receiver']);
444 $parent = Item::selectFirst(['id', 'uri-id', 'private', 'author-link', 'alias'], ['uri' => $item['thr-parent']]);
445 if (!DBA::isResult($parent)) {
446 Logger::warning('Unknown parent item.', ['uri' => $item['thr-parent']]);
449 if ($item_private && ($parent['private'] != Item::PRIVATE)) {
450 Logger::warning('Item is private but the parent is not. Dropping.', ['item-uri' => $item['uri'], 'thr-parent' => $item['thr-parent']]);
454 $content = self::removeImplicitMentionsFromBody($content, $parent);
456 $item['content-warning'] = HTML::toBBCode($activity['summary']);
457 $item['body'] = $content;
460 self::storeFromBody($item);
461 self::storeTags($item['uri-id'], $activity['tags']);
463 $item['location'] = $activity['location'];
465 if (!empty($activity['latitude']) && !empty($activity['longitude'])) {
466 $item['coord'] = $activity['latitude'] . ' ' . $activity['longitude'];
469 $item['app'] = $activity['generator'];
475 * Store hashtags and mentions
479 private static function storeFromBody(array $item)
481 // Make sure to delete all existing tags (can happen when called via the update functionality)
482 DBA::delete('post-tag', ['uri-id' => $item['uri-id']]);
484 Tag::storeFromBody($item['uri-id'], $item['body'], '@!');
488 * Generate a GUID out of an URL
490 * @param string $url message URL
491 * @return string with GUID
493 private static function getGUIDByURL(string $url)
495 $parsed = parse_url($url);
497 $host_hash = hash('crc32', $parsed['host']);
499 unset($parsed["scheme"]);
500 unset($parsed["host"]);
502 $path = implode("/", $parsed);
504 return $host_hash . '-'. hash('fnv164', $path) . '-'. hash('joaat', $path);
508 * Creates an item post
510 * @param array $activity Activity data
511 * @param array $item item array
512 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
513 * @throws \ImagickException
515 public static function postItem(array $activity, array $item)
523 foreach ($activity['receiver'] as $receiver) {
524 if ($receiver == -1) {
528 $item['uid'] = $receiver;
530 $type = $activity['reception_type'][$receiver] ?? Receiver::TARGET_UNKNOWN;
532 case Receiver::TARGET_TO:
533 $item['post-type'] = Item::PT_TO;
535 case Receiver::TARGET_CC:
536 $item['post-type'] = Item::PT_CC;
538 case Receiver::TARGET_BTO:
539 $item['post-type'] = Item::PT_BTO;
541 case Receiver::TARGET_BCC:
542 $item['post-type'] = Item::PT_BCC;
544 case Receiver::TARGET_FOLLOWER:
545 $item['post-type'] = Item::PT_FOLLOWER;
548 $item['post-type'] = Item::PT_ARTICLE;
551 if ($item['isForum'] ?? false) {
552 $item['contact-id'] = Contact::getIdForURL($activity['actor'], $receiver);
554 $item['contact-id'] = Contact::getIdForURL($activity['author'], $receiver);
557 if (($receiver != 0) && empty($item['contact-id'])) {
558 $item['contact-id'] = Contact::getIdForURL($activity['author']);
561 if (!empty($activity['directmessage'])) {
562 self::postMail($activity, $item);
566 if (DI::pConfig()->get($receiver, 'system', 'accept_only_sharer', false) && ($receiver != 0) && ($item['gravity'] == GRAVITY_PARENT)) {
567 $skip = !Contact::isSharingByURL($activity['author'], $receiver);
569 if ($skip && (($activity['type'] == 'as:Announce') || ($item['isForum'] ?? false))) {
570 $skip = !Contact::isSharingByURL($activity['actor'], $receiver);
574 Logger::info('Skipping post', ['uid' => $receiver, 'url' => $item['uri']]);
578 Logger::info('Accepting post', ['uid' => $receiver, 'url' => $item['uri']]);
581 if (($item['gravity'] != GRAVITY_ACTIVITY) && ($activity['object_type'] == 'as:Event')) {
582 self::createEvent($activity, $item);
585 $item_id = Item::insert($item);
587 Logger::info('Item insertion successful', ['user' => $item['uid'], 'item_id' => $item_id]);
589 Logger::notice('Item insertion aborted', ['user' => $item['uid']]);
592 if ($item['uid'] == 0) {
597 // Store send a follow request for every reshare - but only when the item had been stored
598 if ($stored && ($item['private'] != Item::PRIVATE) && ($item['gravity'] == GRAVITY_PARENT) && ($item['author-link'] != $item['owner-link'])) {
599 $author = APContact::getByURL($item['owner-link'], false);
600 // We send automatic follow requests for reshared messages. (We don't need though for forum posts)
601 if ($author['type'] != 'Group') {
602 Logger::info('Send follow request', ['uri' => $item['uri'], 'stored' => $stored, 'to' => $item['author-link']]);
603 ActivityPub\Transmitter::sendFollowObject($item['uri'], $item['author-link']);
609 * Store tags and mentions into the tag table
611 * @param integer $uriid
614 private static function storeTags(int $uriid, array $tags = null)
616 foreach ($tags as $tag) {
617 if (empty($tag['name']) || empty($tag['type']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
621 $hash = substr($tag['name'], 0, 1);
623 if ($tag['type'] == 'Mention') {
624 if (in_array($hash, [Tag::TAG_CHARACTER[Tag::MENTION],
625 Tag::TAG_CHARACTER[Tag::EXCLUSIVE_MENTION],
626 Tag::TAG_CHARACTER[Tag::IMPLICIT_MENTION]])) {
627 $tag['name'] = substr($tag['name'], 1);
629 $type = Tag::IMPLICIT_MENTION;
631 if (!empty($tag['href'])) {
632 $apcontact = APContact::getByURL($tag['href']);
633 if (!empty($apcontact['name']) || !empty($apcontact['nick'])) {
634 $tag['name'] = $apcontact['name'] ?: $apcontact['nick'];
637 } elseif ($tag['type'] == 'Hashtag') {
638 if ($hash == Tag::TAG_CHARACTER[Tag::HASHTAG]) {
639 $tag['name'] = substr($tag['name'], 1);
641 $type = Tag::HASHTAG;
644 if (empty($tag['name'])) {
648 Tag::store($uriid, $type, $tag['name'], $tag['href']);
653 * Creates an mail post
655 * @param array $activity Activity data
656 * @param array $item item array
657 * @return int|bool New mail table row id or false on error
658 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
660 private static function postMail($activity, $item)
662 if (($item['gravity'] != GRAVITY_PARENT) && !DBA::exists('mail', ['uri' => $item['thr-parent'], 'uid' => $item['uid']])) {
663 Logger::info('Parent not found, mail will be discarded.', ['uid' => $item['uid'], 'uri' => $item['thr-parent']]);
667 Logger::info('Direct Message', $item);
670 $msg['uid'] = $item['uid'];
672 $msg['contact-id'] = $item['contact-id'];
674 $contact = Contact::getById($item['contact-id'], ['name', 'url', 'photo']);
675 $msg['from-name'] = $contact['name'];
676 $msg['from-url'] = $contact['url'];
677 $msg['from-photo'] = $contact['photo'];
679 $msg['uri'] = $item['uri'];
680 $msg['created'] = $item['created'];
682 $parent = DBA::selectFirst('mail', ['parent-uri', 'title'], ['uri' => $item['thr-parent']]);
683 if (DBA::isResult($parent)) {
684 $msg['parent-uri'] = $parent['parent-uri'];
685 $msg['title'] = $parent['title'];
687 $msg['parent-uri'] = $item['thr-parent'];
689 if (!empty($item['title'])) {
690 $msg['title'] = $item['title'];
691 } elseif (!empty($item['content-warning'])) {
692 $msg['title'] = $item['content-warning'];
694 // Trying to generate a title out of the body
695 $title = $item['body'];
697 while (preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $title, $matches)) {
698 $title = $matches[3];
701 $title = trim(HTML::toPlaintext(BBCode::convert($title, false, BBCode::API, true), 0));
703 if (strlen($title) > 20) {
704 $title = substr($title, 0, 20) . '...';
707 $msg['title'] = $title;
710 $msg['body'] = $item['body'];
712 return Mail::insert($msg);
716 * Fetches missing posts
718 * @param string $url message URL
719 * @param array $child activity array with the child of this message
720 * @return string fetched message URL
721 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
723 public static function fetchMissingActivity(string $url, array $child = [])
725 if (!empty($child['receiver'])) {
726 $uid = ActivityPub\Receiver::getFirstUserFromReceivers($child['receiver']);
731 $object = ActivityPub::fetchContent($url, $uid);
732 if (empty($object)) {
733 Logger::log('Activity ' . $url . ' was not fetchable, aborting.');
737 if (empty($object['id'])) {
738 Logger::log('Activity ' . $url . ' has got not id, aborting. ' . json_encode($object));
742 if (!empty($child['author'])) {
743 $actor = $child['author'];
744 } elseif (!empty($object['actor'])) {
745 $actor = $object['actor'];
746 } elseif (!empty($object['attributedTo'])) {
747 $actor = $object['attributedTo'];
753 if (!empty($object['published'])) {
754 $published = $object['published'];
755 } elseif (!empty($child['published'])) {
756 $published = $child['published'];
758 $published = DateTimeFormat::utcNow();
762 $activity['@context'] = $object['@context'];
763 unset($object['@context']);
764 $activity['id'] = $object['id'];
765 $activity['to'] = $object['to'] ?? [];
766 $activity['cc'] = $object['cc'] ?? [];
767 $activity['actor'] = $actor;
768 $activity['object'] = $object;
769 $activity['published'] = $published;
770 $activity['type'] = 'Create';
772 $ldactivity = JsonLD::compact($activity);
774 $ldactivity['thread-completion'] = true;
776 ActivityPub\Receiver::processActivity($ldactivity, json_encode($activity));
778 Logger::notice('Activity had been fetched and processed.', ['url' => $url, 'object' => $activity['id']]);
780 return $activity['id'];
784 * perform a "follow" request
786 * @param array $activity
787 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
788 * @throws \ImagickException
790 public static function followUser($activity)
792 $uid = User::getIdForURL($activity['object_id']);
797 $owner = User::getOwnerDataById($uid);
802 $cid = Contact::getIdForURL($activity['actor'], $uid);
804 self::switchContact($cid);
805 DBA::update('contact', ['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
806 $contact = DBA::selectFirst('contact', [], ['id' => $cid, 'network' => Protocol::NATIVE_SUPPORT]);
811 $item = ['author-id' => Contact::getIdForURL($activity['actor']),
812 'author-link' => $activity['actor']];
814 $note = Strings::escapeTags(trim($activity['content'] ?? ''));
816 // Ensure that the contact has got the right network type
817 self::switchContact($item['author-id']);
819 $result = Contact::addRelationship($owner, $contact, $item, false, $note);
820 if ($result === true) {
821 ActivityPub\Transmitter::sendContactAccept($item['author-link'], $activity['id'], $owner['uid']);
824 $cid = Contact::getIdForURL($activity['actor'], $uid);
829 if (empty($contact)) {
830 DBA::update('contact', ['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
833 Logger::log('Follow user ' . $uid . ' from contact ' . $cid . ' with id ' . $activity['id']);
837 * Update the given profile
839 * @param array $activity
842 public static function updatePerson($activity)
844 if (empty($activity['object_id'])) {
848 Logger::info('Updating profile', ['object' => $activity['object_id']]);
849 Contact::updateFromProbeByURL($activity['object_id']);
853 * Delete the given profile
855 * @param array $activity
856 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
858 public static function deletePerson($activity)
860 if (empty($activity['object_id']) || empty($activity['actor'])) {
861 Logger::info('Empty object id or actor.');
865 if ($activity['object_id'] != $activity['actor']) {
866 Logger::info('Object id does not match actor.');
870 $contacts = DBA::select('contact', ['id'], ['nurl' => Strings::normaliseLink($activity['object_id'])]);
871 while ($contact = DBA::fetch($contacts)) {
872 Contact::remove($contact['id']);
874 DBA::close($contacts);
876 Logger::info('Deleted contact', ['object' => $activity['object_id']]);
880 * Accept a follow request
882 * @param array $activity
883 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
884 * @throws \ImagickException
886 public static function acceptFollowUser($activity)
888 $uid = User::getIdForURL($activity['object_actor']);
893 $cid = Contact::getIdForURL($activity['actor'], $uid);
895 Logger::info('No contact found', ['actor' => $activity['actor']]);
899 self::switchContact($cid);
901 $fields = ['pending' => false];
903 $contact = DBA::selectFirst('contact', ['rel'], ['id' => $cid]);
904 if ($contact['rel'] == Contact::FOLLOWER) {
905 $fields['rel'] = Contact::FRIEND;
908 $condition = ['id' => $cid];
909 DBA::update('contact', $fields, $condition);
910 Logger::info('Accept contact request', ['contact' => $cid, 'user' => $uid]);
914 * Reject a follow request
916 * @param array $activity
917 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
918 * @throws \ImagickException
920 public static function rejectFollowUser($activity)
922 $uid = User::getIdForURL($activity['object_actor']);
927 $cid = Contact::getIdForURL($activity['actor'], $uid);
929 Logger::info('No contact found', ['actor' => $activity['actor']]);
933 self::switchContact($cid);
935 if (DBA::exists('contact', ['id' => $cid, 'rel' => Contact::SHARING])) {
936 Contact::remove($cid);
937 Logger::info('Rejected contact request - contact removed', ['contact' => $cid, 'user' => $uid]);
939 Logger::info('Rejected contact request', ['contact' => $cid, 'user' => $uid]);
944 * Undo activity like "like" or "dislike"
946 * @param array $activity
947 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
948 * @throws \ImagickException
950 public static function undoActivity($activity)
952 if (empty($activity['object_id'])) {
956 if (empty($activity['object_actor'])) {
960 $author_id = Contact::getIdForURL($activity['object_actor']);
961 if (empty($author_id)) {
965 Item::markForDeletion(['uri' => $activity['object_id'], 'author-id' => $author_id, 'gravity' => GRAVITY_ACTIVITY]);
969 * Activity to remove a follower
971 * @param array $activity
972 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
973 * @throws \ImagickException
975 public static function undoFollowUser($activity)
977 $uid = User::getIdForURL($activity['object_object']);
982 $owner = User::getOwnerDataById($uid);
987 $cid = Contact::getIdForURL($activity['actor'], $uid);
989 Logger::info('No contact found', ['actor' => $activity['actor']]);
993 self::switchContact($cid);
995 $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
996 if (!DBA::isResult($contact)) {
1000 Contact::removeFollower($owner, $contact);
1001 Logger::info('Undo following request', ['contact' => $cid, 'user' => $uid]);
1005 * Switches a contact to AP if needed
1007 * @param integer $cid Contact ID
1008 * @throws \Exception
1010 private static function switchContact($cid)
1012 $contact = DBA::selectFirst('contact', ['network', 'url'], ['id' => $cid]);
1013 if (!DBA::isResult($contact) || in_array($contact['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN]) || Contact::isLocal($contact['url'])) {
1017 Logger::info('Change existing contact', ['cid' => $cid, 'previous' => $contact['network']]);
1018 Contact::updateFromProbe($cid);
1022 * Collects implicit mentions like:
1023 * - the author of the parent item
1024 * - all the mentioned conversants in the parent item
1026 * @param array $parent Item array with at least ['id', 'author-link', 'alias']
1028 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1030 private static function getImplicitMentionList(array $parent)
1032 $parent_terms = Tag::getByURIId($parent['uri-id'], [Tag::MENTION, Tag::IMPLICIT_MENTION, Tag::EXCLUSIVE_MENTION]);
1034 $parent_author = Contact::getByURL($parent['author-link'], false, ['url', 'nurl', 'alias']);
1036 $implicit_mentions = [];
1037 if (empty($parent_author['url'])) {
1038 Logger::notice('Author public contact unknown.', ['author-link' => $parent['author-link'], 'item-id' => $parent['id']]);
1040 $implicit_mentions[] = $parent_author['url'];
1041 $implicit_mentions[] = $parent_author['nurl'];
1042 $implicit_mentions[] = $parent_author['alias'];
1045 if (!empty($parent['alias'])) {
1046 $implicit_mentions[] = $parent['alias'];
1049 foreach ($parent_terms as $term) {
1050 $contact = Contact::getByURL($term['url'], false, ['url', 'nurl', 'alias']);
1051 if (!empty($contact['url'])) {
1052 $implicit_mentions[] = $contact['url'];
1053 $implicit_mentions[] = $contact['nurl'];
1054 $implicit_mentions[] = $contact['alias'];
1058 return $implicit_mentions;
1062 * Strips from the body prepended implicit mentions
1064 * @param string $body
1065 * @param array $parent
1068 private static function removeImplicitMentionsFromBody(string $body, array $parent)
1070 if (DI::config()->get('system', 'disable_implicit_mentions')) {
1074 $potential_mentions = self::getImplicitMentionList($parent);
1076 $kept_mentions = [];
1078 // Extract one prepended mention at a time from the body
1079 while(preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $body, $matches)) {
1080 if (!in_array($matches[2], $potential_mentions)) {
1081 $kept_mentions[] = $matches[1];
1084 $body = $matches[3];
1087 // Re-appending the kept mentions to the body after extraction
1088 $kept_mentions[] = $body;
1090 return implode('', $kept_mentions);