3 * @copyright Copyright (C) 2010-2022, the Friendica project
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\Content\Text\Markdown;
27 use Friendica\Core\Logger;
28 use Friendica\Core\Protocol;
29 use Friendica\Core\System;
30 use Friendica\Database\DBA;
32 use Friendica\Model\APContact;
33 use Friendica\Model\Contact;
34 use Friendica\Model\Conversation;
35 use Friendica\Model\Event;
36 use Friendica\Model\GServer;
37 use Friendica\Model\Item;
38 use Friendica\Model\ItemURI;
39 use Friendica\Model\Mail;
40 use Friendica\Model\Tag;
41 use Friendica\Model\User;
42 use Friendica\Model\Post;
43 use Friendica\Protocol\Activity;
44 use Friendica\Protocol\ActivityPub;
45 use Friendica\Protocol\Relay;
46 use Friendica\Util\DateTimeFormat;
47 use Friendica\Util\JsonLD;
48 use Friendica\Util\Strings;
51 * ActivityPub Processor Protocol class
56 * Extracts the tag character (#, @, !) from mention links
61 protected static function normalizeMentionLinks(string $body): string
63 return preg_replace('%\[url=([^\[\]]*)]([#@!])(.*?)\[/url]%ism', '$2[url=$1]$3[/url]', $body);
67 * Convert the language array into a language JSON
69 * @param array $languages
70 * @return string language JSON
72 private static function processLanguages(array $languages)
74 $codes = array_keys($languages);
76 foreach ($codes as $code) {
84 return json_encode($lang);
87 * Replaces emojis in the body
89 * @param array $emojis
92 * @return string with replaced emojis
94 private static function replaceEmojis(int $uri_id, $body, array $emojis)
98 array_column($emojis, 'name'),
99 array_map(function ($emoji) {
100 return '[emoji=' . $emoji['href'] . ']' . $emoji['name'] . '[/emoji]';
105 // We store the emoji here to be able to avoid storing it in the media
106 foreach ($emojis as $emoji) {
107 Post\Link::getByLink($uri_id, $emoji['href']);
113 * Store attached media files in the post-media table
116 * @param array $attachment
119 private static function storeAttachmentAsMedia(int $uriid, array $attachment)
121 if (empty($attachment['url'])) {
125 $data = ['uri-id' => $uriid];
126 $data['type'] = Post\Media::UNKNOWN;
127 $data['url'] = $attachment['url'];
128 $data['mimetype'] = $attachment['mediaType'] ?? null;
129 $data['height'] = $attachment['height'] ?? null;
130 $data['width'] = $attachment['width'] ?? null;
131 $data['size'] = $attachment['size'] ?? null;
132 $data['preview'] = $attachment['image'] ?? null;
133 $data['description'] = $attachment['name'] ?? null;
135 Post\Media::insert($data);
139 * Stire attachment data
141 * @param array $activity
144 private static function storeAttachments($activity, $item)
146 if (empty($activity['attachments'])) {
150 foreach ($activity['attachments'] as $attach) {
151 self::storeAttachmentAsMedia($item['uri-id'], $attach);
158 * @param array $activity Activity array
159 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
161 public static function updateItem($activity)
163 $item = Post::selectFirst(['uri', 'uri-id', 'thr-parent', 'gravity', 'post-type'], ['uri' => $activity['id']]);
164 if (!DBA::isResult($item)) {
165 Logger::warning('No existing item, item will be created', ['uri' => $activity['id']]);
166 $item = self::createItem($activity);
167 self::postItem($activity, $item);
171 $item['changed'] = DateTimeFormat::utcNow();
172 $item['edited'] = DateTimeFormat::utc($activity['updated']);
174 $item = self::processContent($activity, $item);
176 self::storeAttachments($activity, $item);
182 Item::update($item, ['uri' => $activity['id']]);
184 if ($activity['object_type'] == 'as:Event') {
185 $posts = Post::select(['event-id', 'uid'], ["`uri` = ? AND `event-id` > ?", $activity['id'], 0]);
186 while ($post = DBA::fetch($posts)) {
187 self::updateEvent($post['event-id'], $activity);
193 * Update an existing event
195 * @param int $event_id
196 * @param array $activity
198 private static function updateEvent(int $event_id, array $activity)
200 $event = DBA::selectFirst('event', [], ['id' => $event_id]);
202 $event['edited'] = DateTimeFormat::utc($activity['updated']);
203 $event['summary'] = HTML::toBBCode($activity['name']);
204 $event['desc'] = HTML::toBBCode($activity['content']);
205 $event['start'] = $activity['start-time'];
206 $event['finish'] = $activity['end-time'];
207 $event['nofinish'] = empty($event['finish']);
208 $event['location'] = $activity['location'];
210 Logger::info('Updating event', ['uri' => $activity['id'], 'id' => $event_id]);
211 Event::store($event);
215 * Prepares data for a message
217 * @param array $activity Activity array
218 * @return array Internal item
219 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
220 * @throws \ImagickException
222 public static function createItem($activity)
225 $item['verb'] = Activity::POST;
226 $item['thr-parent'] = $activity['reply-to-id'];
228 if ($activity['reply-to-id'] == $activity['id']) {
229 $item['gravity'] = GRAVITY_PARENT;
230 $item['object-type'] = Activity\ObjectType::NOTE;
232 $item['gravity'] = GRAVITY_COMMENT;
233 $item['object-type'] = Activity\ObjectType::COMMENT;
236 if (empty($activity['directmessage']) && ($activity['id'] != $activity['reply-to-id']) && !Post::exists(['uri' => $activity['reply-to-id']])) {
237 Logger::notice('Parent not found. Try to refetch it.', ['parent' => $activity['reply-to-id']]);
238 self::fetchMissingActivity($activity['reply-to-id'], $activity);
241 $item['diaspora_signed_text'] = $activity['diaspora:comment'] ?? '';
243 /// @todo What to do with $activity['context']?
244 if (empty($activity['directmessage']) && ($item['gravity'] != GRAVITY_PARENT) && !Post::exists(['uri' => $item['thr-parent']])) {
245 Logger::info('Parent not found, message will be discarded.', ['thr-parent' => $item['thr-parent']]);
249 $item['network'] = Protocol::ACTIVITYPUB;
250 $item['author-link'] = $activity['author'];
251 $item['author-id'] = Contact::getIdForURL($activity['author']);
252 $item['owner-link'] = $activity['actor'];
253 $item['owner-id'] = Contact::getIdForURL($activity['actor']);
255 if (in_array(0, $activity['receiver']) && !empty($activity['unlisted'])) {
256 $item['private'] = Item::UNLISTED;
257 } elseif (in_array(0, $activity['receiver'])) {
258 $item['private'] = Item::PUBLIC;
260 $item['private'] = Item::PRIVATE;
263 if (!empty($activity['raw'])) {
264 $item['source'] = $activity['raw'];
265 $item['protocol'] = Conversation::PARCEL_ACTIVITYPUB;
266 $item['conversation-href'] = $activity['context'] ?? '';
267 $item['conversation-uri'] = $activity['conversation'] ?? '';
269 if (isset($activity['push'])) {
270 $item['direction'] = $activity['push'] ? Conversation::PUSH : Conversation::PULL;
274 if (!empty($activity['from-relay'])) {
275 $item['direction'] = Conversation::RELAY;
278 if ($activity['object_type'] == 'as:Article') {
279 $item['post-type'] = Item::PT_ARTICLE;
280 } elseif ($activity['object_type'] == 'as:Audio') {
281 $item['post-type'] = Item::PT_AUDIO;
282 } elseif ($activity['object_type'] == 'as:Document') {
283 $item['post-type'] = Item::PT_DOCUMENT;
284 } elseif ($activity['object_type'] == 'as:Event') {
285 $item['post-type'] = Item::PT_EVENT;
286 } elseif ($activity['object_type'] == 'as:Image') {
287 $item['post-type'] = Item::PT_IMAGE;
288 } elseif ($activity['object_type'] == 'as:Page') {
289 $item['post-type'] = Item::PT_PAGE;
290 } elseif ($activity['object_type'] == 'as:Question') {
291 $item['post-type'] = Item::PT_POLL;
292 } elseif ($activity['object_type'] == 'as:Video') {
293 $item['post-type'] = Item::PT_VIDEO;
295 $item['post-type'] = Item::PT_NOTE;
298 $item['isForum'] = false;
300 if (!empty($activity['thread-completion'])) {
301 if ($activity['thread-completion'] != $item['owner-id']) {
302 $actor = Contact::getById($activity['thread-completion'], ['url']);
303 $item['causer-link'] = $actor['url'];
304 $item['causer-id'] = $activity['thread-completion'];
305 Logger::info('Use inherited actor as causer.', ['id' => $item['owner-id'], 'activity' => $activity['thread-completion'], 'owner' => $item['owner-link'], 'actor' => $actor['url']]);
307 // Store the original actor in the "causer" fields to enable the check for ignored or blocked contacts
308 $item['causer-link'] = $item['owner-link'];
309 $item['causer-id'] = $item['owner-id'];
310 Logger::info('Use actor as causer.', ['id' => $item['owner-id'], 'actor' => $item['owner-link']]);
313 $item['owner-link'] = $item['author-link'];
314 $item['owner-id'] = $item['author-id'];
316 $actor = APContact::getByURL($item['owner-link'], false);
317 $item['isForum'] = ($actor['type'] == 'Group');
320 $item['uri'] = $activity['id'];
322 if (empty($activity['published']) || empty($activity['updated'])) {
323 DI::logger()->notice('published or updated keys are empty for activity', ['activity' => $activity, 'callstack' => System::callstack(10)]);
326 $item['created'] = DateTimeFormat::utc($activity['published'] ?? 'now');
327 $item['edited'] = DateTimeFormat::utc($activity['updated'] ?? 'now');
328 $guid = $activity['sc:identifier'] ?: self::getGUIDByURL($item['uri']);
329 $item['guid'] = $activity['diaspora:guid'] ?: $guid;
331 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
332 if (empty($item['uri-id'])) {
333 Logger::warning('Unable to get a uri-id for an item uri', ['uri' => $item['uri'], 'guid' => $item['guid']]);
337 $item = self::processContent($activity, $item);
339 Logger::info('Message was not processed');
343 $item['plink'] = $activity['alternate-url'] ?? $item['uri'];
345 self::storeAttachments($activity, $item);
347 // We received the post via AP, so we set the protocol of the server to AP
348 $contact = Contact::getById($item['author-id'], ['gsid']);
349 if (!empty($contact['gsid'])) {
350 GServer::setProtocol($contact['gsid'], Post\DeliveryData::ACTIVITYPUB);
353 if ($item['author-id'] != $item['owner-id']) {
354 $contact = Contact::getById($item['owner-id'], ['gsid']);
355 if (!empty($contact['gsid'])) {
356 GServer::setProtocol($contact['gsid'], Post\DeliveryData::ACTIVITYPUB);
366 * @param array $activity
367 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
368 * @throws \ImagickException
370 public static function deleteItem($activity)
372 $owner = Contact::getIdForURL($activity['actor']);
374 Logger::info('Deleting item', ['object' => $activity['object_id'], 'owner' => $owner]);
375 Item::markForDeletion(['uri' => $activity['object_id'], 'owner-id' => $owner]);
379 * Prepare the item array for an activity
381 * @param array $activity Activity array
382 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
383 * @throws \ImagickException
385 public static function addTag($activity)
387 if (empty($activity['object_content']) || empty($activity['object_id'])) {
391 foreach ($activity['receiver'] as $receiver) {
392 $item = Post::selectFirst(['id', 'uri-id', 'origin', 'author-link'], ['uri' => $activity['target_id'], 'uid' => $receiver]);
393 if (!DBA::isResult($item)) {
394 // We don't fetch missing content for this purpose
398 if (($item['author-link'] != $activity['actor']) && !$item['origin']) {
399 Logger::info('Not origin, not from the author, skipping update', ['id' => $item['id'], 'author' => $item['author-link'], 'actor' => $activity['actor']]);
403 Tag::store($item['uri-id'], Tag::HASHTAG, $activity['object_content'], $activity['object_id']);
404 Logger::info('Tagged item', ['id' => $item['id'], 'tag' => $activity['object_content'], 'uri' => $activity['target_id'], 'actor' => $activity['actor']]);
409 * Prepare the item array for an activity
411 * @param array $activity Activity array
412 * @param string $verb Activity verb
413 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
414 * @throws \ImagickException
416 public static function createActivity($activity, $verb)
418 $item = self::createItem($activity);
419 $item['verb'] = $verb;
420 $item['thr-parent'] = $activity['object_id'];
421 $item['gravity'] = GRAVITY_ACTIVITY;
422 unset($item['post-type']);
423 $item['object-type'] = Activity\ObjectType::NOTE;
425 $item['diaspora_signed_text'] = $activity['diaspora:like'] ?? '';
427 self::postItem($activity, $item);
433 * @param array $activity Activity array
436 * @return int event id
439 public static function createEvent($activity, $item)
441 $event['summary'] = HTML::toBBCode($activity['name']);
442 $event['desc'] = HTML::toBBCode($activity['content']);
443 $event['start'] = $activity['start-time'];
444 $event['finish'] = $activity['end-time'];
445 $event['nofinish'] = empty($event['finish']);
446 $event['location'] = $activity['location'];
447 $event['cid'] = $item['contact-id'];
448 $event['uid'] = $item['uid'];
449 $event['uri'] = $item['uri'];
450 $event['edited'] = $item['edited'];
451 $event['private'] = $item['private'];
452 $event['guid'] = $item['guid'];
453 $event['plink'] = $item['plink'];
454 $event['network'] = $item['network'];
455 $event['protocol'] = $item['protocol'];
456 $event['direction'] = $item['direction'];
457 $event['source'] = $item['source'];
459 $ev = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
460 if (DBA::isResult($ev)) {
461 $event['id'] = $ev['id'];
464 $event_id = Event::store($event);
466 Logger::info('Event was stored', ['id' => $event_id]);
472 * Process the content
474 * @param array $activity Activity array
476 * @return array|bool Returns the item array or false if there was an unexpected occurrence
479 private static function processContent($activity, $item)
481 if (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/markdown')) {
482 $item['title'] = Markdown::toBBCode($activity['name']);
483 $content = Markdown::toBBCode($activity['content']);
484 } elseif (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/bbcode')) {
485 $item['title'] = $activity['name'];
486 $content = $activity['content'];
488 // By default assume "text/html"
489 $item['title'] = HTML::toBBCode($activity['name']);
490 $content = HTML::toBBCode($activity['content']);
493 if (!empty($activity['languages'])) {
494 $item['language'] = self::processLanguages($activity['languages']);
497 if (!empty($activity['emojis'])) {
498 $content = self::replaceEmojis($item['uri-id'], $content, $activity['emojis']);
501 $content = self::addMentionLinks($content, $activity['tags']);
503 if (!empty($activity['source'])) {
504 $item['body'] = $activity['source'];
505 $item['raw-body'] = $content;
506 $item['body'] = Item::improveSharedDataInBody($item);
508 if (empty($activity['directmessage']) && ($item['thr-parent'] != $item['uri']) && ($item['gravity'] == GRAVITY_COMMENT)) {
509 $item_private = !in_array(0, $activity['item_receiver']);
510 $parent = Post::selectFirst(['id', 'uri-id', 'private', 'author-link', 'alias'], ['uri' => $item['thr-parent']]);
511 if (!DBA::isResult($parent)) {
512 Logger::warning('Unknown parent item.', ['uri' => $item['thr-parent']]);
515 if ($item_private && ($parent['private'] != Item::PRIVATE)) {
516 Logger::warning('Item is private but the parent is not. Dropping.', ['item-uri' => $item['uri'], 'thr-parent' => $item['thr-parent']]);
520 $content = self::removeImplicitMentionsFromBody($content, $parent);
522 $item['content-warning'] = HTML::toBBCode($activity['summary']);
523 $item['raw-body'] = $item['body'] = $content;
526 self::storeFromBody($item);
527 self::storeTags($item['uri-id'], $activity['tags']);
529 self::storeReceivers($item['uri-id'], $activity['receiver_urls'] ?? []);
531 $item['location'] = $activity['location'];
533 if (!empty($activity['latitude']) && !empty($activity['longitude'])) {
534 $item['coord'] = $activity['latitude'] . ' ' . $activity['longitude'];
537 $item['app'] = $activity['generator'];
543 * Store hashtags and mentions
547 private static function storeFromBody(array $item)
549 // Make sure to delete all existing tags (can happen when called via the update functionality)
550 DBA::delete('post-tag', ['uri-id' => $item['uri-id']]);
552 Tag::storeFromBody($item['uri-id'], $item['body'], '@!');
556 * Generate a GUID out of an URL
558 * @param string $url message URL
559 * @return string with GUID
561 private static function getGUIDByURL(string $url)
563 $parsed = parse_url($url);
565 $host_hash = hash('crc32', $parsed['host']);
567 unset($parsed["scheme"]);
568 unset($parsed["host"]);
570 $path = implode("/", $parsed);
572 return $host_hash . '-'. hash('fnv164', $path) . '-'. hash('joaat', $path);
576 * Checks if an incoming message is wanted
578 * @param array $activity
580 * @return boolean Is the message wanted?
582 private static function isSolicitedMessage(array $activity, array $item)
584 // The checks are split to improve the support when searching why a message was accepted.
585 if (count($activity['receiver']) != 1) {
586 // The message has more than one receiver, so it is wanted.
587 Logger::debug('Message has got several receivers - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
591 if ($item['private'] == Item::PRIVATE) {
592 // We only look at public posts here. Private posts are expected to be intentionally posted to the single receiver.
593 Logger::debug('Message is private - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
597 if (!empty($activity['from-relay'])) {
598 // We check relay posts at another place. When it arrived here, the message is already checked.
599 Logger::debug('Message is a relay post that is already checked - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
603 if (!empty($activity['thread-completion'])) {
604 // The thread completion mode means that the post is fetched intentionally.
605 // This can have several causes, in doubt we keep the message.
606 // This can possibly be improved in the future.
607 Logger::debug('Message is in completion mode - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
611 if ($item['gravity'] != GRAVITY_PARENT) {
612 // We cannot reliably check at this point if a comment or activity belongs to an accepted post or needs to be fetched
613 // This can possibly be improved in the future.
614 Logger::debug('Message is no parent - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
618 $tags = array_column(Tag::getByURIId($item['uri-id'], [Tag::HASHTAG]), 'name');
619 if (Relay::isSolicitedPost($tags, $item['body'], $item['author-id'], $item['uri'], Protocol::ACTIVITYPUB)) {
620 Logger::debug('Post is accepted because of the relay settings', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
628 * Creates an item post
630 * @param array $activity Activity data
631 * @param array $item item array
632 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
633 * @throws \ImagickException
635 public static function postItem(array $activity, array $item)
642 ksort($activity['receiver']);
644 if (!self::isSolicitedMessage($activity, $item)) {
645 DBA::delete('item-uri', ['id' => $item['uri-id']]);
649 foreach ($activity['receiver'] as $receiver) {
650 if ($receiver == -1) {
654 $item['uid'] = $receiver;
656 $type = $activity['reception_type'][$receiver] ?? Receiver::TARGET_UNKNOWN;
658 case Receiver::TARGET_TO:
659 $item['post-reason'] = Item::PR_TO;
661 case Receiver::TARGET_CC:
662 $item['post-reason'] = Item::PR_CC;
664 case Receiver::TARGET_BTO:
665 $item['post-reason'] = Item::PR_BTO;
667 case Receiver::TARGET_BCC:
668 $item['post-reason'] = Item::PR_BCC;
670 case Receiver::TARGET_FOLLOWER:
671 $item['post-reason'] = Item::PR_FOLLOWER;
673 case Receiver::TARGET_ANSWER:
674 $item['post-reason'] = Item::PR_COMMENT;
676 case Receiver::TARGET_GLOBAL:
677 $item['post-reason'] = Item::PR_GLOBAL;
680 $item['post-reason'] = Item::PR_NONE;
683 if (!empty($activity['from-relay'])) {
684 $item['post-reason'] = Item::PR_RELAY;
685 } elseif (!empty($activity['thread-completion'])) {
686 $item['post-reason'] = Item::PR_FETCHED;
689 if ($item['isForum'] ?? false) {
690 $item['contact-id'] = Contact::getIdForURL($activity['actor'], $receiver);
692 $item['contact-id'] = Contact::getIdForURL($activity['author'], $receiver);
695 if (($receiver != 0) && empty($item['contact-id'])) {
696 $item['contact-id'] = Contact::getIdForURL($activity['author']);
699 if (!empty($activity['directmessage'])) {
700 self::postMail($activity, $item);
704 if (!($item['isForum'] ?? false) && ($receiver != 0) && ($item['gravity'] == GRAVITY_PARENT) && !Contact::isSharingByURL($activity['author'], $receiver)) {
705 if ($item['post-reason'] == Item::PR_BCC) {
706 Logger::info('Top level post via BCC from a non sharer, ignoring', ['uid' => $receiver, 'contact' => $item['contact-id']]);
711 !empty($activity['thread-children-type'])
712 && in_array($activity['thread-children-type'], Receiver::ACTIVITY_TYPES)
713 && DI::pConfig()->get($receiver, 'system', 'accept_only_sharer') != Item::COMPLETION_LIKE
715 Logger::info('Top level post from thread completion from a non sharer had been initiated via an activity, ignoring',
716 ['type' => $activity['thread-children-type'], 'user' => $item['uid'], 'causer' => $item['causer-link'], 'author' => $activity['author'], 'url' => $item['uri']]);
723 if ($receiver != 0) {
724 $user = User::getById($receiver, ['account-type']);
725 if (!empty($user['account-type'])) {
726 $is_forum = ($user['account-type'] == User::ACCOUNT_TYPE_COMMUNITY);
730 if (!$is_forum && DI::pConfig()->get($receiver, 'system', 'accept_only_sharer') == Item::COMPLETION_NONE && ($receiver != 0) && ($item['gravity'] == GRAVITY_PARENT)) {
731 $skip = !Contact::isSharingByURL($activity['author'], $receiver);
733 if ($skip && (($activity['type'] == 'as:Announce') || ($item['isForum'] ?? false))) {
734 $skip = !Contact::isSharingByURL($activity['actor'], $receiver);
738 Logger::info('Skipping post', ['uid' => $receiver, 'url' => $item['uri']]);
742 Logger::info('Accepting post', ['uid' => $receiver, 'url' => $item['uri']]);
745 if (($item['gravity'] != GRAVITY_ACTIVITY) && ($activity['object_type'] == 'as:Event')) {
746 $event_id = self::createEvent($activity, $item);
748 $item = Event::getItemArrayForImportedId($event_id, $item);
751 $item_id = Item::insert($item);
753 Logger::info('Item insertion successful', ['user' => $item['uid'], 'item_id' => $item_id]);
755 Logger::notice('Item insertion aborted', ['user' => $item['uid']]);
758 if ($item['uid'] == 0) {
763 // Store send a follow request for every reshare - but only when the item had been stored
764 if ($stored && ($item['private'] != Item::PRIVATE) && ($item['gravity'] == GRAVITY_PARENT) && ($item['author-link'] != $item['owner-link'])) {
765 $author = APContact::getByURL($item['owner-link'], false);
766 // We send automatic follow requests for reshared messages. (We don't need though for forum posts)
767 if ($author['type'] != 'Group') {
768 Logger::info('Send follow request', ['uri' => $item['uri'], 'stored' => $stored, 'to' => $item['author-link']]);
769 ActivityPub\Transmitter::sendFollowObject($item['uri'], $item['author-link']);
775 * Store tags and mentions into the tag table
777 * @param integer $uriid
780 private static function storeTags(int $uriid, array $tags = null)
782 foreach ($tags as $tag) {
783 if (empty($tag['name']) || empty($tag['type']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
787 $hash = substr($tag['name'], 0, 1);
789 if ($tag['type'] == 'Mention') {
790 if (in_array($hash, [Tag::TAG_CHARACTER[Tag::MENTION],
791 Tag::TAG_CHARACTER[Tag::EXCLUSIVE_MENTION],
792 Tag::TAG_CHARACTER[Tag::IMPLICIT_MENTION]])) {
793 $tag['name'] = substr($tag['name'], 1);
795 $type = Tag::IMPLICIT_MENTION;
797 if (!empty($tag['href'])) {
798 $apcontact = APContact::getByURL($tag['href']);
799 if (!empty($apcontact['name']) || !empty($apcontact['nick'])) {
800 $tag['name'] = $apcontact['name'] ?: $apcontact['nick'];
803 } elseif ($tag['type'] == 'Hashtag') {
804 if ($hash == Tag::TAG_CHARACTER[Tag::HASHTAG]) {
805 $tag['name'] = substr($tag['name'], 1);
807 $type = Tag::HASHTAG;
810 if (empty($tag['name'])) {
814 Tag::store($uriid, $type, $tag['name'], $tag['href']);
818 public static function storeReceivers(int $uriid, array $receivers)
820 foreach (['as:to' => Tag::TO, 'as:cc' => Tag::CC, 'as:bto' => Tag::BTO, 'as:bcc' => Tag::BCC] as $element => $type) {
821 if (!empty($receivers[$element])) {
822 foreach ($receivers[$element] as $receiver) {
823 if ($receiver == ActivityPub::PUBLIC_COLLECTION) {
824 $name = Receiver::PUBLIC_COLLECTION;
826 $name = trim(parse_url($receiver, PHP_URL_PATH), '/');
828 Tag::store($uriid, $type, $name, $receiver);
835 * Creates an mail post
837 * @param array $activity Activity data
838 * @param array $item item array
839 * @return int|bool New mail table row id or false on error
840 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
842 private static function postMail($activity, $item)
844 if (($item['gravity'] != GRAVITY_PARENT) && !DBA::exists('mail', ['uri' => $item['thr-parent'], 'uid' => $item['uid']])) {
845 Logger::info('Parent not found, mail will be discarded.', ['uid' => $item['uid'], 'uri' => $item['thr-parent']]);
849 Logger::info('Direct Message', $item);
852 $msg['uid'] = $item['uid'];
854 $msg['contact-id'] = $item['contact-id'];
856 $contact = Contact::getById($item['contact-id'], ['name', 'url', 'photo']);
857 $msg['from-name'] = $contact['name'];
858 $msg['from-url'] = $contact['url'];
859 $msg['from-photo'] = $contact['photo'];
861 $msg['uri'] = $item['uri'];
862 $msg['created'] = $item['created'];
864 $parent = DBA::selectFirst('mail', ['parent-uri', 'title'], ['uri' => $item['thr-parent']]);
865 if (DBA::isResult($parent)) {
866 $msg['parent-uri'] = $parent['parent-uri'];
867 $msg['title'] = $parent['title'];
869 $msg['parent-uri'] = $item['thr-parent'];
871 if (!empty($item['title'])) {
872 $msg['title'] = $item['title'];
873 } elseif (!empty($item['content-warning'])) {
874 $msg['title'] = $item['content-warning'];
876 // Trying to generate a title out of the body
877 $title = $item['body'];
879 while (preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $title, $matches)) {
880 $title = $matches[3];
883 $title = trim(BBCode::toPlaintext($title));
885 if (strlen($title) > 20) {
886 $title = substr($title, 0, 20) . '...';
889 $msg['title'] = $title;
892 $msg['body'] = $item['body'];
894 return Mail::insert($msg);
898 * Fetches missing posts
900 * @param string $url message URL
901 * @param array $child activity array with the child of this message
902 * @param string $relay_actor Relay actor
903 * @return string fetched message URL
904 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
906 public static function fetchMissingActivity(string $url, array $child = [], string $relay_actor = '')
908 if (!empty($child['receiver'])) {
909 $uid = ActivityPub\Receiver::getFirstUserFromReceivers($child['receiver']);
914 $object = ActivityPub::fetchContent($url, $uid);
915 if (empty($object)) {
916 Logger::notice('Activity was not fetchable, aborting.', ['url' => $url]);
920 if (empty($object['id'])) {
921 Logger::notice('Activity has got not id, aborting. ', ['url' => $url, 'object' => $object]);
925 if (!empty($object['actor'])) {
926 $object_actor = $object['actor'];
927 } elseif (!empty($object['attributedTo'])) {
928 $object_actor = $object['attributedTo'];
929 if (is_array($object_actor)) {
930 $compacted = JsonLD::compact($object);
931 $object_actor = JsonLD::fetchElement($compacted, 'as:attributedTo', '@id');
938 $signer = [$object_actor];
940 if (!empty($child['author'])) {
941 $actor = $child['author'];
944 $actor = $object_actor;
947 if (!empty($object['published'])) {
948 $published = $object['published'];
949 } elseif (!empty($child['published'])) {
950 $published = $child['published'];
952 $published = DateTimeFormat::utcNow();
956 $activity['@context'] = $object['@context'] ?? ActivityPub::CONTEXT;
957 unset($object['@context']);
958 $activity['id'] = $object['id'];
959 $activity['to'] = $object['to'] ?? [];
960 $activity['cc'] = $object['cc'] ?? [];
961 $activity['actor'] = $actor;
962 $activity['object'] = $object;
963 $activity['published'] = $published;
964 $activity['type'] = 'Create';
966 $ldactivity = JsonLD::compact($activity);
968 if (!empty($relay_actor)) {
969 $ldactivity['thread-completion'] = $ldactivity['from-relay'] = Contact::getIdForURL($relay_actor);
970 } elseif (!empty($child['thread-completion'])) {
971 $ldactivity['thread-completion'] = $child['thread-completion'];
973 $ldactivity['thread-completion'] = Contact::getIdForURL($actor);
976 if (!empty($child['type'])) {
977 $ldactivity['thread-children-type'] = $child['type'];
980 if (!empty($relay_actor) && !self::acceptIncomingMessage($ldactivity, $object['id'])) {
984 ActivityPub\Receiver::processActivity($ldactivity, json_encode($activity), $uid, true, false, $signer);
986 Logger::notice('Activity had been fetched and processed.', ['url' => $url, 'object' => $activity['id']]);
988 return $activity['id'];
992 * Test if incoming relay messages should be accepted
994 * @param array $activity activity array
995 * @param string $id object ID
996 * @return boolean true if message is accepted
998 private static function acceptIncomingMessage(array $activity, string $id)
1000 if (empty($activity['as:object'])) {
1001 Logger::info('No object field in activity - accepted', ['id' => $id]);
1005 $replyto = JsonLD::fetchElement($activity['as:object'], 'as:inReplyTo', '@id');
1006 $uriid = ItemURI::getIdByURI($replyto);
1007 if (Post::exists(['uri-id' => $uriid])) {
1008 Logger::info('Post is a reply to an existing post - accepted', ['id' => $id, 'uri-id' => $uriid, 'replyto' => $replyto]);
1012 $attributed_to = JsonLD::fetchElement($activity['as:object'], 'as:attributedTo', '@id');
1013 $authorid = Contact::getIdForURL($attributed_to);
1015 $body = HTML::toBBCode(JsonLD::fetchElement($activity['as:object'], 'as:content', '@value'));
1018 $tags = Receiver::processTags(JsonLD::fetchElementArray($activity['as:object'], 'as:tag') ?? []);
1019 if (!empty($tags)) {
1020 foreach ($tags as $tag) {
1021 if ($tag['type'] != 'Hashtag') {
1024 $messageTags[] = ltrim(mb_strtolower($tag['name']), '#');
1028 return Relay::isSolicitedPost($messageTags, $body, $authorid, $id, Protocol::ACTIVITYPUB);
1032 * perform a "follow" request
1034 * @param array $activity
1035 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1036 * @throws \ImagickException
1038 public static function followUser($activity)
1040 $uid = User::getIdForURL($activity['object_id']);
1045 $owner = User::getOwnerDataById($uid);
1046 if (empty($owner)) {
1050 $cid = Contact::getIdForURL($activity['actor'], $uid);
1052 self::switchContact($cid);
1053 Contact::update(['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
1056 $item = ['author-id' => Contact::getIdForURL($activity['actor']),
1057 'author-link' => $activity['actor']];
1059 // Ensure that the contact has got the right network type
1060 self::switchContact($item['author-id']);
1062 $result = Contact::addRelationship($owner, [], $item, false, $activity['content'] ?? '');
1063 if ($result === true) {
1064 ActivityPub\Transmitter::sendContactAccept($item['author-link'], $activity['id'], $owner['uid']);
1067 $cid = Contact::getIdForURL($activity['actor'], $uid);
1072 if (empty($contact)) {
1073 Contact::update(['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
1076 Logger::notice('Follow user ' . $uid . ' from contact ' . $cid . ' with id ' . $activity['id']);
1080 * Update the given profile
1082 * @param array $activity
1083 * @throws \Exception
1085 public static function updatePerson($activity)
1087 if (empty($activity['object_id'])) {
1091 Logger::info('Updating profile', ['object' => $activity['object_id']]);
1092 Contact::updateFromProbeByURL($activity['object_id']);
1096 * Delete the given profile
1098 * @param array $activity
1099 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1101 public static function deletePerson($activity)
1103 if (empty($activity['object_id']) || empty($activity['actor'])) {
1104 Logger::info('Empty object id or actor.');
1108 if ($activity['object_id'] != $activity['actor']) {
1109 Logger::info('Object id does not match actor.');
1113 $contacts = DBA::select('contact', ['id'], ['nurl' => Strings::normaliseLink($activity['object_id'])]);
1114 while ($contact = DBA::fetch($contacts)) {
1115 Contact::remove($contact['id']);
1117 DBA::close($contacts);
1119 Logger::info('Deleted contact', ['object' => $activity['object_id']]);
1123 * Accept a follow request
1125 * @param array $activity
1126 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1127 * @throws \ImagickException
1129 public static function acceptFollowUser($activity)
1131 $uid = User::getIdForURL($activity['object_actor']);
1136 $cid = Contact::getIdForURL($activity['actor'], $uid);
1138 Logger::info('No contact found', ['actor' => $activity['actor']]);
1142 self::switchContact($cid);
1144 $fields = ['pending' => false];
1146 $contact = DBA::selectFirst('contact', ['rel'], ['id' => $cid]);
1147 if ($contact['rel'] == Contact::FOLLOWER) {
1148 $fields['rel'] = Contact::FRIEND;
1151 $condition = ['id' => $cid];
1152 Contact::update($fields, $condition);
1153 Logger::info('Accept contact request', ['contact' => $cid, 'user' => $uid]);
1157 * Reject a follow request
1159 * @param array $activity
1160 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1161 * @throws \ImagickException
1163 public static function rejectFollowUser($activity)
1165 $uid = User::getIdForURL($activity['object_actor']);
1170 $cid = Contact::getIdForURL($activity['actor'], $uid);
1172 Logger::info('No contact found', ['actor' => $activity['actor']]);
1176 self::switchContact($cid);
1178 $contact = Contact::getById($cid, ['rel']);
1179 if ($contact['rel'] == Contact::SHARING) {
1180 Contact::remove($cid);
1181 Logger::info('Rejected contact request - contact removed', ['contact' => $cid, 'user' => $uid]);
1182 } elseif ($contact['rel'] == Contact::FRIEND) {
1183 Contact::update(['rel' => Contact::FOLLOWER], ['id' => $cid]);
1185 Logger::info('Rejected contact request', ['contact' => $cid, 'user' => $uid]);
1190 * Undo activity like "like" or "dislike"
1192 * @param array $activity
1193 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1194 * @throws \ImagickException
1196 public static function undoActivity($activity)
1198 if (empty($activity['object_id'])) {
1202 if (empty($activity['object_actor'])) {
1206 $author_id = Contact::getIdForURL($activity['object_actor']);
1207 if (empty($author_id)) {
1211 Item::markForDeletion(['uri' => $activity['object_id'], 'author-id' => $author_id, 'gravity' => GRAVITY_ACTIVITY]);
1215 * Activity to remove a follower
1217 * @param array $activity
1218 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1219 * @throws \ImagickException
1221 public static function undoFollowUser($activity)
1223 $uid = User::getIdForURL($activity['object_object']);
1228 $owner = User::getOwnerDataById($uid);
1229 if (empty($owner)) {
1233 $cid = Contact::getIdForURL($activity['actor'], $uid);
1235 Logger::info('No contact found', ['actor' => $activity['actor']]);
1239 self::switchContact($cid);
1241 $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
1242 if (!DBA::isResult($contact)) {
1246 Contact::removeFollower($contact);
1247 Logger::info('Undo following request', ['contact' => $cid, 'user' => $uid]);
1251 * Switches a contact to AP if needed
1253 * @param integer $cid Contact ID
1254 * @throws \Exception
1256 private static function switchContact($cid)
1258 $contact = DBA::selectFirst('contact', ['network', 'url'], ['id' => $cid]);
1259 if (!DBA::isResult($contact) || in_array($contact['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN]) || Contact::isLocal($contact['url'])) {
1263 Logger::info('Change existing contact', ['cid' => $cid, 'previous' => $contact['network']]);
1264 Contact::updateFromProbe($cid);
1268 * Collects implicit mentions like:
1269 * - the author of the parent item
1270 * - all the mentioned conversants in the parent item
1272 * @param array $parent Item array with at least ['id', 'author-link', 'alias']
1274 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1276 private static function getImplicitMentionList(array $parent)
1278 $parent_terms = Tag::getByURIId($parent['uri-id'], [Tag::MENTION, Tag::IMPLICIT_MENTION, Tag::EXCLUSIVE_MENTION]);
1280 $parent_author = Contact::getByURL($parent['author-link'], false, ['url', 'nurl', 'alias']);
1282 $implicit_mentions = [];
1283 if (empty($parent_author['url'])) {
1284 Logger::notice('Author public contact unknown.', ['author-link' => $parent['author-link'], 'parent-id' => $parent['id']]);
1286 $implicit_mentions[] = $parent_author['url'];
1287 $implicit_mentions[] = $parent_author['nurl'];
1288 $implicit_mentions[] = $parent_author['alias'];
1291 if (!empty($parent['alias'])) {
1292 $implicit_mentions[] = $parent['alias'];
1295 foreach ($parent_terms as $term) {
1296 $contact = Contact::getByURL($term['url'], false, ['url', 'nurl', 'alias']);
1297 if (!empty($contact['url'])) {
1298 $implicit_mentions[] = $contact['url'];
1299 $implicit_mentions[] = $contact['nurl'];
1300 $implicit_mentions[] = $contact['alias'];
1304 return $implicit_mentions;
1308 * Strips from the body prepended implicit mentions
1310 * @param string $body
1311 * @param array $parent
1314 private static function removeImplicitMentionsFromBody(string $body, array $parent)
1316 if (DI::config()->get('system', 'disable_implicit_mentions')) {
1320 $potential_mentions = self::getImplicitMentionList($parent);
1322 $kept_mentions = [];
1324 // Extract one prepended mention at a time from the body
1325 while(preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $body, $matches)) {
1326 if (!in_array($matches[2], $potential_mentions)) {
1327 $kept_mentions[] = $matches[1];
1330 $body = $matches[3];
1333 // Re-appending the kept mentions to the body after extraction
1334 $kept_mentions[] = $body;
1336 return implode('', $kept_mentions);
1340 * Adds links to string mentions
1342 * @param string $body
1343 * @param array $tags
1346 protected static function addMentionLinks(string $body, array $tags): string
1348 // This prevents links to be added again to Pleroma-style mention links
1349 $body = self::normalizeMentionLinks($body);
1351 $body = BBCode::performWithEscapedTags($body, ['url'], function ($body) use ($tags) {
1352 foreach ($tags as $tag) {
1353 if (empty($tag['name']) || empty($tag['type']) || empty($tag['href']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
1357 $hash = substr($tag['name'], 0, 1);
1358 $name = substr($tag['name'], 1);
1359 if (!in_array($hash, Tag::TAG_CHARACTER)) {
1361 $name = $tag['name'];
1364 $body = str_replace($tag['name'], $hash . '[url=' . $tag['href'] . ']' . $name . '[/url]', $body);