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\Model\Post;
41 use Friendica\Protocol\Activity;
42 use Friendica\Protocol\ActivityPub;
43 use Friendica\Protocol\Relay;
44 use Friendica\Util\DateTimeFormat;
45 use Friendica\Util\JsonLD;
46 use Friendica\Util\Strings;
49 * ActivityPub Processor Protocol class
54 * Converts mentions from Pleroma into the Friendica format
58 * @return string converted body
60 private static function convertMentions($body)
62 $URLSearchString = "^\[\]";
63 $body = preg_replace("/\[url\=([$URLSearchString]*)\]([#@!])(.*?)\[\/url\]/ism", '$2[url=$1]$3[/url]', $body);
69 * Replaces emojis in the body
71 * @param array $emojis
74 * @return string with replaced emojis
76 private static function replaceEmojis($body, array $emojis)
78 foreach ($emojis as $emoji) {
79 $replace = '[class=emoji mastodon][img=' . $emoji['href'] . ']' . $emoji['name'] . '[/img][/class]';
80 $body = str_replace($emoji['name'], $replace, $body);
86 * Store attached media files in the post-media table
89 * @param array $attachment
92 private static function storeAttachmentAsMedia(int $uriid, array $attachment)
94 if (empty($attachment['url'])) {
98 $data = ['uri-id' => $uriid];
100 $filetype = strtolower(substr($attachment['mediaType'], 0, strpos($attachment['mediaType'], '/')));
101 if ($filetype == 'image') {
102 $data['type'] = Post\Media::IMAGE;
103 } elseif ($filetype == 'video') {
104 $data['type'] = Post\Media::VIDEO;
105 } elseif ($filetype == 'audio') {
106 $data['type'] = Post\Media::AUDIO;
107 } elseif (in_array($attachment['mediaType'], ['application/x-bittorrent', 'application/x-bittorrent;x-scheme-handler/magnet'])) {
108 $data['type'] = Post\Media::TORRENT;
110 Logger::info('Unknown type', ['attachment' => $attachment]);
114 $data['url'] = $attachment['url'];
115 $data['mimetype'] = $attachment['mediaType'];
116 $data['height'] = $attachment['height'] ?? null;
117 $data['size'] = $attachment['size'] ?? null;
118 $data['preview'] = $attachment['image'] ?? null;
119 $data['description'] = $attachment['name'] ?? null;
121 Post\Media::insert($data);
125 * Add attachment data to the item array
127 * @param array $activity
130 * @return array array
132 private static function constructAttachList($activity, $item)
134 if (empty($activity['attachments'])) {
138 foreach ($activity['attachments'] as $attach) {
139 switch ($attach['type']) {
142 'url' => $attach['url'],
143 'type' => $attach['type'],
144 'title' => $attach['title'] ?? '',
145 'text' => $attach['desc'] ?? '',
146 'image' => $attach['image'] ?? '',
150 $item['body'] = PageInfo::appendDataToBody($item['body'], $data);
153 self::storeAttachmentAsMedia($item['uri-id'], $attach);
155 $filetype = strtolower(substr($attach['mediaType'], 0, strpos($attach['mediaType'], '/')));
156 if ($filetype == 'image') {
157 if (!empty($activity['source'])) {
158 foreach ([0, 1, 2] as $size) {
159 if (preg_match('#/photo/.*-' . $size . '\.#ism', $attach['url']) &&
160 strpos(preg_replace('#(/photo/.*)-[012]\.#ism', '$1-' . $size . '.', $activity['source']), $attach['url'])) {
164 if (strpos($activity['source'], $attach['url'])) {
169 $item['body'] .= "\n";
171 // image is the preview/thumbnail URL
172 if (!empty($attach['image'])) {
173 $item['body'] .= '[url=' . $attach['url'] . ']';
174 $attach['url'] = $attach['image'];
177 if (empty($attach['name'])) {
178 $item['body'] .= '[img]' . $attach['url'] . '[/img]';
180 $item['body'] .= '[img=' . $attach['url'] . ']' . $attach['name'] . '[/img]';
183 if (!empty($attach['image'])) {
184 $item['body'] .= '[/url]';
186 } elseif ($filetype == 'audio') {
187 if (!empty($activity['source']) && strpos($activity['source'], $attach['url'])) {
191 $item['body'] .= "\n[audio]" . $attach['url'] . '[/audio]';
192 } elseif ($filetype == 'video') {
193 if (!empty($activity['source']) && strpos($activity['source'], $attach['url'])) {
197 $item['body'] .= "\n[video]" . $attach['url'] . '[/video]';
208 * @param array $activity Activity array
209 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
211 public static function updateItem($activity)
213 $item = Item::selectFirst(['uri', 'uri-id', 'thr-parent', 'gravity'], ['uri' => $activity['id']]);
214 if (!DBA::isResult($item)) {
215 Logger::warning('No existing item, item will be created', ['uri' => $activity['id']]);
216 $item = self::createItem($activity);
217 self::postItem($activity, $item);
221 $item['changed'] = DateTimeFormat::utcNow();
222 $item['edited'] = DateTimeFormat::utc($activity['updated']);
224 $item = self::processContent($activity, $item);
226 $item = self::constructAttachList($activity, $item);
232 Item::update($item, ['uri' => $activity['id']]);
236 * Prepares data for a message
238 * @param array $activity Activity array
239 * @return array Internal item
240 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
241 * @throws \ImagickException
243 public static function createItem($activity)
246 $item['verb'] = Activity::POST;
247 $item['thr-parent'] = $activity['reply-to-id'];
249 if ($activity['reply-to-id'] == $activity['id']) {
250 $item['gravity'] = GRAVITY_PARENT;
251 $item['object-type'] = Activity\ObjectType::NOTE;
253 $item['gravity'] = GRAVITY_COMMENT;
254 $item['object-type'] = Activity\ObjectType::COMMENT;
257 if (empty($activity['directmessage']) && ($activity['id'] != $activity['reply-to-id']) && !Item::exists(['uri' => $activity['reply-to-id']])) {
258 Logger::notice('Parent not found. Try to refetch it.', ['parent' => $activity['reply-to-id']]);
259 self::fetchMissingActivity($activity['reply-to-id'], $activity);
262 $item['diaspora_signed_text'] = $activity['diaspora:comment'] ?? '';
264 /// @todo What to do with $activity['context']?
265 if (empty($activity['directmessage']) && ($item['gravity'] != GRAVITY_PARENT) && !Item::exists(['uri' => $item['thr-parent']])) {
266 Logger::info('Parent not found, message will be discarded.', ['thr-parent' => $item['thr-parent']]);
270 $item['network'] = Protocol::ACTIVITYPUB;
271 $item['author-link'] = $activity['author'];
272 $item['author-id'] = Contact::getIdForURL($activity['author']);
273 $item['owner-link'] = $activity['actor'];
274 $item['owner-id'] = Contact::getIdForURL($activity['actor']);
276 if (in_array(0, $activity['receiver']) && !empty($activity['unlisted'])) {
277 $item['private'] = Item::UNLISTED;
278 } elseif (in_array(0, $activity['receiver'])) {
279 $item['private'] = Item::PUBLIC;
281 $item['private'] = Item::PRIVATE;
284 if (!empty($activity['raw'])) {
285 $item['source'] = $activity['raw'];
286 $item['protocol'] = Conversation::PARCEL_ACTIVITYPUB;
287 $item['conversation-href'] = $activity['context'] ?? '';
288 $item['conversation-uri'] = $activity['conversation'] ?? '';
290 if (isset($activity['push'])) {
291 $item['direction'] = $activity['push'] ? Conversation::PUSH : Conversation::PULL;
295 $item['isForum'] = false;
297 if (!empty($activity['thread-completion'])) {
298 if ($activity['thread-completion'] != $item['owner-id']) {
299 $actor = Contact::getById($activity['thread-completion'], ['url']);
300 $item['causer-link'] = $actor['url'];
301 $item['causer-id'] = $activity['thread-completion'];
302 Logger::info('Use inherited actor as causer.', ['id' => $item['owner-id'], 'activity' => $activity['thread-completion'], 'owner' => $item['owner-link'], 'actor' => $actor['url']]);
304 // Store the original actor in the "causer" fields to enable the check for ignored or blocked contacts
305 $item['causer-link'] = $item['owner-link'];
306 $item['causer-id'] = $item['owner-id'];
307 Logger::info('Use actor as causer.', ['id' => $item['owner-id'], 'actor' => $item['owner-link']]);
310 $item['owner-link'] = $item['author-link'];
311 $item['owner-id'] = $item['author-id'];
313 $actor = APContact::getByURL($item['owner-link'], false);
314 $item['isForum'] = ($actor['type'] == 'Group');
317 $item['uri'] = $activity['id'];
319 $item['created'] = DateTimeFormat::utc($activity['published']);
320 $item['edited'] = DateTimeFormat::utc($activity['updated']);
321 $guid = $activity['sc:identifier'] ?: self::getGUIDByURL($item['uri']);
322 $item['guid'] = $activity['diaspora:guid'] ?: $guid;
324 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
326 $item = self::processContent($activity, $item);
328 Logger::info('Message was not processed');
332 $item['plink'] = $activity['alternate-url'] ?? $item['uri'];
334 $item = self::constructAttachList($activity, $item);
342 * @param array $activity
343 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
344 * @throws \ImagickException
346 public static function deleteItem($activity)
348 $owner = Contact::getIdForURL($activity['actor']);
350 Logger::info('Deleting item', ['object' => $activity['object_id'], 'owner' => $owner]);
351 Item::markForDeletion(['uri' => $activity['object_id'], 'owner-id' => $owner]);
355 * Prepare the item array for an activity
357 * @param array $activity Activity array
358 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
359 * @throws \ImagickException
361 public static function addTag($activity)
363 if (empty($activity['object_content']) || empty($activity['object_id'])) {
367 foreach ($activity['receiver'] as $receiver) {
368 $item = Item::selectFirst(['id', 'uri-id', 'tag', 'origin', 'author-link'], ['uri' => $activity['target_id'], 'uid' => $receiver]);
369 if (!DBA::isResult($item)) {
370 // We don't fetch missing content for this purpose
374 if (($item['author-link'] != $activity['actor']) && !$item['origin']) {
375 Logger::info('Not origin, not from the author, skipping update', ['id' => $item['id'], 'author' => $item['author-link'], 'actor' => $activity['actor']]);
379 Tag::store($item['uri-id'], Tag::HASHTAG, $activity['object_content'], $activity['object_id']);
380 Logger::info('Tagged item', ['id' => $item['id'], 'tag' => $activity['object_content'], 'uri' => $activity['target_id'], 'actor' => $activity['actor']]);
385 * Prepare the item array for an activity
387 * @param array $activity Activity array
388 * @param string $verb Activity verb
389 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
390 * @throws \ImagickException
392 public static function createActivity($activity, $verb)
394 $item = self::createItem($activity);
395 $item['verb'] = $verb;
396 $item['thr-parent'] = $activity['object_id'];
397 $item['gravity'] = GRAVITY_ACTIVITY;
398 $item['object-type'] = Activity\ObjectType::NOTE;
400 $item['diaspora_signed_text'] = $activity['diaspora:like'] ?? '';
402 self::postItem($activity, $item);
408 * @param array $activity Activity array
412 public static function createEvent($activity, $item)
414 $event['summary'] = HTML::toBBCode($activity['name']);
415 $event['desc'] = HTML::toBBCode($activity['content']);
416 $event['start'] = $activity['start-time'];
417 $event['finish'] = $activity['end-time'];
418 $event['nofinish'] = empty($event['finish']);
419 $event['location'] = $activity['location'];
420 $event['adjust'] = true;
421 $event['cid'] = $item['contact-id'];
422 $event['uid'] = $item['uid'];
423 $event['uri'] = $item['uri'];
424 $event['edited'] = $item['edited'];
425 $event['private'] = $item['private'];
426 $event['guid'] = $item['guid'];
427 $event['plink'] = $item['plink'];
429 $condition = ['uri' => $item['uri'], 'uid' => $item['uid']];
430 $ev = DBA::selectFirst('event', ['id'], $condition);
431 if (DBA::isResult($ev)) {
432 $event['id'] = $ev['id'];
435 $event_id = Event::store($event);
436 Logger::info('Event was stored', ['id' => $event_id]);
440 * Process the content
442 * @param array $activity Activity array
444 * @return array|bool Returns the item array or false if there was an unexpected occurrence
447 private static function processContent($activity, $item)
449 $item['title'] = HTML::toBBCode($activity['name']);
451 $content = HTML::toBBCode($activity['content']);
453 if (!empty($activity['emojis'])) {
454 $content = self::replaceEmojis($content, $activity['emojis']);
457 $content = self::convertMentions($content);
459 if (!empty($activity['source'])) {
460 $item['body'] = $activity['source'];
461 $item['raw-body'] = $content;
463 if (empty($activity['directmessage']) && ($item['thr-parent'] != $item['uri']) && ($item['gravity'] == GRAVITY_COMMENT)) {
464 $item_private = !in_array(0, $activity['item_receiver']);
465 $parent = Item::selectFirst(['id', 'uri-id', 'private', 'author-link', 'alias'], ['uri' => $item['thr-parent']]);
466 if (!DBA::isResult($parent)) {
467 Logger::warning('Unknown parent item.', ['uri' => $item['thr-parent']]);
470 if ($item_private && ($parent['private'] != Item::PRIVATE)) {
471 Logger::warning('Item is private but the parent is not. Dropping.', ['item-uri' => $item['uri'], 'thr-parent' => $item['thr-parent']]);
475 $content = self::removeImplicitMentionsFromBody($content, $parent);
477 $item['content-warning'] = HTML::toBBCode($activity['summary']);
478 $item['raw-body'] = $item['body'] = $content;
481 self::storeFromBody($item);
482 self::storeTags($item['uri-id'], $activity['tags']);
484 $item['location'] = $activity['location'];
486 if (!empty($activity['latitude']) && !empty($activity['longitude'])) {
487 $item['coord'] = $activity['latitude'] . ' ' . $activity['longitude'];
490 $item['app'] = $activity['generator'];
496 * Store hashtags and mentions
500 private static function storeFromBody(array $item)
502 // Make sure to delete all existing tags (can happen when called via the update functionality)
503 DBA::delete('post-tag', ['uri-id' => $item['uri-id']]);
505 Tag::storeFromBody($item['uri-id'], $item['body'], '@!');
509 * Generate a GUID out of an URL
511 * @param string $url message URL
512 * @return string with GUID
514 private static function getGUIDByURL(string $url)
516 $parsed = parse_url($url);
518 $host_hash = hash('crc32', $parsed['host']);
520 unset($parsed["scheme"]);
521 unset($parsed["host"]);
523 $path = implode("/", $parsed);
525 return $host_hash . '-'. hash('fnv164', $path) . '-'. hash('joaat', $path);
529 * Creates an item post
531 * @param array $activity Activity data
532 * @param array $item item array
533 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
534 * @throws \ImagickException
536 public static function postItem(array $activity, array $item)
543 ksort($activity['receiver']);
545 foreach ($activity['receiver'] as $receiver) {
546 if ($receiver == -1) {
550 $item['uid'] = $receiver;
552 $type = $activity['reception_type'][$receiver] ?? Receiver::TARGET_UNKNOWN;
554 case Receiver::TARGET_TO:
555 $item['post-type'] = Item::PT_TO;
557 case Receiver::TARGET_CC:
558 $item['post-type'] = Item::PT_CC;
560 case Receiver::TARGET_BTO:
561 $item['post-type'] = Item::PT_BTO;
563 case Receiver::TARGET_BCC:
564 $item['post-type'] = Item::PT_BCC;
566 case Receiver::TARGET_FOLLOWER:
567 $item['post-type'] = Item::PT_FOLLOWER;
569 case Receiver::TARGET_ANSWER:
570 $item['post-type'] = Item::PT_COMMENT;
572 case Receiver::TARGET_GLOBAL:
573 $item['post-type'] = Item::PT_GLOBAL;
576 $item['post-type'] = Item::PT_ARTICLE;
579 if (!empty($activity['from-relay'])) {
580 $item['post-type'] = Item::PT_RELAY;
581 } elseif (!empty($activity['thread-completion'])) {
582 $item['post-type'] = Item::PT_FETCHED;
585 if ($item['isForum'] ?? false) {
586 $item['contact-id'] = Contact::getIdForURL($activity['actor'], $receiver);
588 $item['contact-id'] = Contact::getIdForURL($activity['author'], $receiver);
591 if (($receiver != 0) && empty($item['contact-id'])) {
592 $item['contact-id'] = Contact::getIdForURL($activity['author']);
595 if (!empty($activity['directmessage'])) {
596 self::postMail($activity, $item);
600 if (DI::pConfig()->get($receiver, 'system', 'accept_only_sharer', false) && ($receiver != 0) && ($item['gravity'] == GRAVITY_PARENT)) {
601 $skip = !Contact::isSharingByURL($activity['author'], $receiver);
603 if ($skip && (($activity['type'] == 'as:Announce') || ($item['isForum'] ?? false))) {
604 $skip = !Contact::isSharingByURL($activity['actor'], $receiver);
608 Logger::info('Skipping post', ['uid' => $receiver, 'url' => $item['uri']]);
612 Logger::info('Accepting post', ['uid' => $receiver, 'url' => $item['uri']]);
615 if (($item['gravity'] != GRAVITY_ACTIVITY) && ($activity['object_type'] == 'as:Event')) {
616 self::createEvent($activity, $item);
619 $item_id = Item::insert($item);
621 Logger::info('Item insertion successful', ['user' => $item['uid'], 'item_id' => $item_id]);
623 Logger::notice('Item insertion aborted', ['user' => $item['uid']]);
626 if ($item['uid'] == 0) {
631 // Store send a follow request for every reshare - but only when the item had been stored
632 if ($stored && ($item['private'] != Item::PRIVATE) && ($item['gravity'] == GRAVITY_PARENT) && ($item['author-link'] != $item['owner-link'])) {
633 $author = APContact::getByURL($item['owner-link'], false);
634 // We send automatic follow requests for reshared messages. (We don't need though for forum posts)
635 if ($author['type'] != 'Group') {
636 Logger::info('Send follow request', ['uri' => $item['uri'], 'stored' => $stored, 'to' => $item['author-link']]);
637 ActivityPub\Transmitter::sendFollowObject($item['uri'], $item['author-link']);
643 * Store tags and mentions into the tag table
645 * @param integer $uriid
648 private static function storeTags(int $uriid, array $tags = null)
650 foreach ($tags as $tag) {
651 if (empty($tag['name']) || empty($tag['type']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
655 $hash = substr($tag['name'], 0, 1);
657 if ($tag['type'] == 'Mention') {
658 if (in_array($hash, [Tag::TAG_CHARACTER[Tag::MENTION],
659 Tag::TAG_CHARACTER[Tag::EXCLUSIVE_MENTION],
660 Tag::TAG_CHARACTER[Tag::IMPLICIT_MENTION]])) {
661 $tag['name'] = substr($tag['name'], 1);
663 $type = Tag::IMPLICIT_MENTION;
665 if (!empty($tag['href'])) {
666 $apcontact = APContact::getByURL($tag['href']);
667 if (!empty($apcontact['name']) || !empty($apcontact['nick'])) {
668 $tag['name'] = $apcontact['name'] ?: $apcontact['nick'];
671 } elseif ($tag['type'] == 'Hashtag') {
672 if ($hash == Tag::TAG_CHARACTER[Tag::HASHTAG]) {
673 $tag['name'] = substr($tag['name'], 1);
675 $type = Tag::HASHTAG;
678 if (empty($tag['name'])) {
682 Tag::store($uriid, $type, $tag['name'], $tag['href']);
687 * Creates an mail post
689 * @param array $activity Activity data
690 * @param array $item item array
691 * @return int|bool New mail table row id or false on error
692 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
694 private static function postMail($activity, $item)
696 if (($item['gravity'] != GRAVITY_PARENT) && !DBA::exists('mail', ['uri' => $item['thr-parent'], 'uid' => $item['uid']])) {
697 Logger::info('Parent not found, mail will be discarded.', ['uid' => $item['uid'], 'uri' => $item['thr-parent']]);
701 Logger::info('Direct Message', $item);
704 $msg['uid'] = $item['uid'];
706 $msg['contact-id'] = $item['contact-id'];
708 $contact = Contact::getById($item['contact-id'], ['name', 'url', 'photo']);
709 $msg['from-name'] = $contact['name'];
710 $msg['from-url'] = $contact['url'];
711 $msg['from-photo'] = $contact['photo'];
713 $msg['uri'] = $item['uri'];
714 $msg['created'] = $item['created'];
716 $parent = DBA::selectFirst('mail', ['parent-uri', 'title'], ['uri' => $item['thr-parent']]);
717 if (DBA::isResult($parent)) {
718 $msg['parent-uri'] = $parent['parent-uri'];
719 $msg['title'] = $parent['title'];
721 $msg['parent-uri'] = $item['thr-parent'];
723 if (!empty($item['title'])) {
724 $msg['title'] = $item['title'];
725 } elseif (!empty($item['content-warning'])) {
726 $msg['title'] = $item['content-warning'];
728 // Trying to generate a title out of the body
729 $title = $item['body'];
731 while (preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $title, $matches)) {
732 $title = $matches[3];
735 $title = trim(HTML::toPlaintext(BBCode::convert($title, false, BBCode::API, true), 0));
737 if (strlen($title) > 20) {
738 $title = substr($title, 0, 20) . '...';
741 $msg['title'] = $title;
744 $msg['body'] = $item['body'];
746 return Mail::insert($msg);
750 * Fetches missing posts
752 * @param string $url message URL
753 * @param array $child activity array with the child of this message
754 * @param string $relay_actor Relay actor
755 * @return string fetched message URL
756 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
758 public static function fetchMissingActivity(string $url, array $child = [], string $relay_actor = '')
760 if (!empty($child['receiver'])) {
761 $uid = ActivityPub\Receiver::getFirstUserFromReceivers($child['receiver']);
766 $object = ActivityPub::fetchContent($url, $uid);
767 if (empty($object)) {
768 Logger::log('Activity ' . $url . ' was not fetchable, aborting.');
772 if (empty($object['id'])) {
773 Logger::log('Activity ' . $url . ' has got not id, aborting. ' . json_encode($object));
777 if (!empty($object['actor'])) {
778 $object_actor = $object['actor'];
779 } elseif (!empty($object['attributedTo'])) {
780 $object_actor = $object['attributedTo'];
781 if (is_array($object_actor)) {
782 $compacted = JsonLD::compact($object);
783 $object_actor = JsonLD::fetchElement($compacted, 'as:attributedTo', '@id');
790 $signer = [$object_actor];
792 if (!empty($child['author'])) {
793 $actor = $child['author'];
796 $actor = $object_actor;
799 if (!empty($object['published'])) {
800 $published = $object['published'];
801 } elseif (!empty($child['published'])) {
802 $published = $child['published'];
804 $published = DateTimeFormat::utcNow();
808 $activity['@context'] = $object['@context'];
809 unset($object['@context']);
810 $activity['id'] = $object['id'];
811 $activity['to'] = $object['to'] ?? [];
812 $activity['cc'] = $object['cc'] ?? [];
813 $activity['actor'] = $actor;
814 $activity['object'] = $object;
815 $activity['published'] = $published;
816 $activity['type'] = 'Create';
818 $ldactivity = JsonLD::compact($activity);
820 if (!empty($relay_actor)) {
821 $ldactivity['thread-completion'] = $ldactivity['from-relay'] = Contact::getIdForURL($relay_actor);
822 } elseif (!empty($child['thread-completion'])) {
823 $ldactivity['thread-completion'] = $child['thread-completion'];
825 $ldactivity['thread-completion'] = Contact::getIdForURL($actor);
828 if (!empty($relay_actor) && !self::acceptIncomingMessage($ldactivity, $object['id'])) {
832 ActivityPub\Receiver::processActivity($ldactivity, json_encode($activity), $uid, true, false, $signer);
834 Logger::notice('Activity had been fetched and processed.', ['url' => $url, 'object' => $activity['id']]);
836 return $activity['id'];
840 * Test if incoming relay messages should be accepted
842 * @param array $activity activity array
843 * @param string $id object ID
844 * @return boolean true if message is accepted
846 private static function acceptIncomingMessage(array $activity, string $id)
848 if (empty($activity['as:object'])) {
849 Logger::info('No object field in activity - accepted', ['id' => $id]);
853 $replyto = JsonLD::fetchElement($activity['as:object'], 'as:inReplyTo', '@id');
854 if (Item::exists(['uri' => $replyto])) {
855 Logger::info('Post is a reply to an existing post - accepted', ['id' => $id, 'replyto' => $replyto]);
859 $attributed_to = JsonLD::fetchElement($activity['as:object'], 'as:attributedTo', '@id');
860 $authorid = Contact::getIdForURL($attributed_to);
862 $body = HTML::toBBCode(JsonLD::fetchElement($activity['as:object'], 'as:content', '@value'));
865 $tags = Receiver::processTags(JsonLD::fetchElementArray($activity['as:object'], 'as:tag') ?? []);
867 foreach ($tags as $tag) {
868 if ($tag['type'] != 'Hashtag') {
871 $messageTags[] = ltrim(mb_strtolower($tag['name']), '#');
875 return Relay::isSolicitedPost($messageTags, $body, $authorid, $id, Protocol::ACTIVITYPUB);
879 * perform a "follow" request
881 * @param array $activity
882 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
883 * @throws \ImagickException
885 public static function followUser($activity)
887 $uid = User::getIdForURL($activity['object_id']);
892 $owner = User::getOwnerDataById($uid);
897 $cid = Contact::getIdForURL($activity['actor'], $uid);
899 self::switchContact($cid);
900 DBA::update('contact', ['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
901 $contact = DBA::selectFirst('contact', [], ['id' => $cid, 'network' => Protocol::NATIVE_SUPPORT]);
906 $item = ['author-id' => Contact::getIdForURL($activity['actor']),
907 'author-link' => $activity['actor']];
909 $note = Strings::escapeTags(trim($activity['content'] ?? ''));
911 // Ensure that the contact has got the right network type
912 self::switchContact($item['author-id']);
914 $result = Contact::addRelationship($owner, $contact, $item, false, $note);
915 if ($result === true) {
916 ActivityPub\Transmitter::sendContactAccept($item['author-link'], $activity['id'], $owner['uid']);
919 $cid = Contact::getIdForURL($activity['actor'], $uid);
924 if (empty($contact)) {
925 DBA::update('contact', ['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
928 Logger::log('Follow user ' . $uid . ' from contact ' . $cid . ' with id ' . $activity['id']);
932 * Update the given profile
934 * @param array $activity
937 public static function updatePerson($activity)
939 if (empty($activity['object_id'])) {
943 Logger::info('Updating profile', ['object' => $activity['object_id']]);
944 Contact::updateFromProbeByURL($activity['object_id']);
948 * Delete the given profile
950 * @param array $activity
951 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
953 public static function deletePerson($activity)
955 if (empty($activity['object_id']) || empty($activity['actor'])) {
956 Logger::info('Empty object id or actor.');
960 if ($activity['object_id'] != $activity['actor']) {
961 Logger::info('Object id does not match actor.');
965 $contacts = DBA::select('contact', ['id'], ['nurl' => Strings::normaliseLink($activity['object_id'])]);
966 while ($contact = DBA::fetch($contacts)) {
967 Contact::remove($contact['id']);
969 DBA::close($contacts);
971 Logger::info('Deleted contact', ['object' => $activity['object_id']]);
975 * Accept a follow request
977 * @param array $activity
978 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
979 * @throws \ImagickException
981 public static function acceptFollowUser($activity)
983 $uid = User::getIdForURL($activity['object_actor']);
988 $cid = Contact::getIdForURL($activity['actor'], $uid);
990 Logger::info('No contact found', ['actor' => $activity['actor']]);
994 self::switchContact($cid);
996 $fields = ['pending' => false];
998 $contact = DBA::selectFirst('contact', ['rel'], ['id' => $cid]);
999 if ($contact['rel'] == Contact::FOLLOWER) {
1000 $fields['rel'] = Contact::FRIEND;
1003 $condition = ['id' => $cid];
1004 DBA::update('contact', $fields, $condition);
1005 Logger::info('Accept contact request', ['contact' => $cid, 'user' => $uid]);
1009 * Reject a follow request
1011 * @param array $activity
1012 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1013 * @throws \ImagickException
1015 public static function rejectFollowUser($activity)
1017 $uid = User::getIdForURL($activity['object_actor']);
1022 $cid = Contact::getIdForURL($activity['actor'], $uid);
1024 Logger::info('No contact found', ['actor' => $activity['actor']]);
1028 self::switchContact($cid);
1030 if (DBA::exists('contact', ['id' => $cid, 'rel' => Contact::SHARING])) {
1031 Contact::remove($cid);
1032 Logger::info('Rejected contact request - contact removed', ['contact' => $cid, 'user' => $uid]);
1034 Logger::info('Rejected contact request', ['contact' => $cid, 'user' => $uid]);
1039 * Undo activity like "like" or "dislike"
1041 * @param array $activity
1042 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1043 * @throws \ImagickException
1045 public static function undoActivity($activity)
1047 if (empty($activity['object_id'])) {
1051 if (empty($activity['object_actor'])) {
1055 $author_id = Contact::getIdForURL($activity['object_actor']);
1056 if (empty($author_id)) {
1060 Item::markForDeletion(['uri' => $activity['object_id'], 'author-id' => $author_id, 'gravity' => GRAVITY_ACTIVITY]);
1064 * Activity to remove a follower
1066 * @param array $activity
1067 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1068 * @throws \ImagickException
1070 public static function undoFollowUser($activity)
1072 $uid = User::getIdForURL($activity['object_object']);
1077 $owner = User::getOwnerDataById($uid);
1078 if (empty($owner)) {
1082 $cid = Contact::getIdForURL($activity['actor'], $uid);
1084 Logger::info('No contact found', ['actor' => $activity['actor']]);
1088 self::switchContact($cid);
1090 $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
1091 if (!DBA::isResult($contact)) {
1095 Contact::removeFollower($owner, $contact);
1096 Logger::info('Undo following request', ['contact' => $cid, 'user' => $uid]);
1100 * Switches a contact to AP if needed
1102 * @param integer $cid Contact ID
1103 * @throws \Exception
1105 private static function switchContact($cid)
1107 $contact = DBA::selectFirst('contact', ['network', 'url'], ['id' => $cid]);
1108 if (!DBA::isResult($contact) || in_array($contact['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN]) || Contact::isLocal($contact['url'])) {
1112 Logger::info('Change existing contact', ['cid' => $cid, 'previous' => $contact['network']]);
1113 Contact::updateFromProbe($cid);
1117 * Collects implicit mentions like:
1118 * - the author of the parent item
1119 * - all the mentioned conversants in the parent item
1121 * @param array $parent Item array with at least ['id', 'author-link', 'alias']
1123 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1125 private static function getImplicitMentionList(array $parent)
1127 $parent_terms = Tag::getByURIId($parent['uri-id'], [Tag::MENTION, Tag::IMPLICIT_MENTION, Tag::EXCLUSIVE_MENTION]);
1129 $parent_author = Contact::getByURL($parent['author-link'], false, ['url', 'nurl', 'alias']);
1131 $implicit_mentions = [];
1132 if (empty($parent_author['url'])) {
1133 Logger::notice('Author public contact unknown.', ['author-link' => $parent['author-link'], 'item-id' => $parent['id']]);
1135 $implicit_mentions[] = $parent_author['url'];
1136 $implicit_mentions[] = $parent_author['nurl'];
1137 $implicit_mentions[] = $parent_author['alias'];
1140 if (!empty($parent['alias'])) {
1141 $implicit_mentions[] = $parent['alias'];
1144 foreach ($parent_terms as $term) {
1145 $contact = Contact::getByURL($term['url'], false, ['url', 'nurl', 'alias']);
1146 if (!empty($contact['url'])) {
1147 $implicit_mentions[] = $contact['url'];
1148 $implicit_mentions[] = $contact['nurl'];
1149 $implicit_mentions[] = $contact['alias'];
1153 return $implicit_mentions;
1157 * Strips from the body prepended implicit mentions
1159 * @param string $body
1160 * @param array $parent
1163 private static function removeImplicitMentionsFromBody(string $body, array $parent)
1165 if (DI::config()->get('system', 'disable_implicit_mentions')) {
1169 $potential_mentions = self::getImplicitMentionList($parent);
1171 $kept_mentions = [];
1173 // Extract one prepended mention at a time from the body
1174 while(preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $body, $matches)) {
1175 if (!in_array($matches[2], $potential_mentions)) {
1176 $kept_mentions[] = $matches[1];
1179 $body = $matches[3];
1182 // Re-appending the kept mentions to the body after extraction
1183 $kept_mentions[] = $body;
1185 return implode('', $kept_mentions);