3 * @copyright Copyright (C) 2010-2023, 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;
25 use Friendica\Content\Feature;
26 use Friendica\Content\Text\BBCode;
27 use Friendica\Core\Cache\Enum\Duration;
28 use Friendica\Core\Logger;
29 use Friendica\Core\Protocol;
30 use Friendica\Core\System;
31 use Friendica\Database\DBA;
33 use Friendica\Model\APContact;
34 use Friendica\Model\Contact;
35 use Friendica\Model\GServer;
36 use Friendica\Model\Item;
37 use Friendica\Model\Photo;
38 use Friendica\Model\Post;
39 use Friendica\Model\Tag;
40 use Friendica\Model\User;
41 use Friendica\Network\HTTPException;
42 use Friendica\Protocol\Activity;
43 use Friendica\Protocol\ActivityPub;
44 use Friendica\Protocol\Relay;
45 use Friendica\Util\DateTimeFormat;
46 use Friendica\Util\HTTPSignature;
47 use Friendica\Util\LDSignature;
48 use Friendica\Util\Map;
49 use Friendica\Util\Network;
50 use Friendica\Util\Strings;
51 use Friendica\Util\XML;
54 * ActivityPub Transmitter Protocol class
61 const CACHEKEY_FEATURED = 'transmitter:getFeatured:';
62 const CACHEKEY_CONTACTS = 'transmitter:getContacts:';
65 * Add relay servers to the list of inboxes
67 * @param array $inboxes
68 * @return array inboxes with added relay servers
70 public static function addRelayServerInboxes(array $inboxes = []): array
72 foreach (Relay::getList(['inbox']) as $contact) {
73 $inboxes[$contact['inbox']] = $contact['inbox'];
80 * Add relay servers to the list of inboxes
82 * @param array $inboxes
83 * @return array inboxes with added relay servers
85 public static function addRelayServerInboxesForItem(int $item_id, array $inboxes = []): array
87 $item = Post::selectFirst(['uid'], ['id' => $item_id]);
92 $relays = Relay::getDirectRelayList($item_id);
97 foreach ($relays as $relay) {
98 $contact = Contact::getByURLForUser($relay['url'], $item['uid'], false, ['id']);
99 $inboxes[$relay['batch']][] = $contact['id'] ?? 0;
105 * Subscribe to a relay and updates contact on success
107 * @param string $url Subscribe actor url
108 * @return bool success
110 public static function sendRelayFollow(string $url): bool
112 $contact = Contact::getByURL($url);
113 if (empty($contact)) {
117 $activity_id = self::activityIDFromContact($contact['id']);
118 $success = self::sendActivity('Follow', $url, 0, $activity_id);
120 Contact::update(['rel' => Contact::FRIEND], ['id' => $contact['id']]);
127 * Unsubscribe from a relay and updates contact on success or forced
129 * @param string $url Subscribe actor url
130 * @param bool $force Set the relay status as non follower even if unsubscribe hadn't worked
131 * @return bool success
133 public static function sendRelayUndoFollow(string $url, bool $force = false): bool
135 $contact = Contact::getByURL($url);
136 if (empty($contact)) {
140 $success = self::sendContactUndo($url, $contact['id'], User::getSystemAccount());
142 if ($success || $force) {
143 Contact::update(['rel' => Contact::NOTHING], ['id' => $contact['id']]);
150 * Collects a list of contacts of the given owner
152 * @param array $owner Owner array
153 * @param array $rel The relevant value(s) contact.rel should match
154 * @param string $module The name of the relevant AP endpoint module (followers|following)
155 * @param integer $page Page number
156 * @param string $requester URL of the requester
157 * @param boolean $nocache Wether to bypass caching
158 * @return array of owners
161 public static function getContacts(array $owner, array $rel, string $module, int $page = null, string $requester = null, bool $nocache = false): array
164 $cachekey = self::CACHEKEY_CONTACTS . $module . ':'. $owner['uid'];
165 $result = DI::cache()->get($cachekey);
166 if (!$nocache && !is_null($result)) {
173 'uid' => $owner['uid'],
182 $condition = DBA::mergeConditions($parameters, ["`url` IN (SELECT `url` FROM `apcontact`)"]);
184 $total = DBA::count('contact', $condition);
186 $modulePath = '/' . $module . '/';
188 $data = ['@context' => ActivityPub::CONTEXT];
189 $data['id'] = DI::baseUrl() . $modulePath . $owner['nickname'];
190 $data['type'] = 'OrderedCollection';
191 $data['totalItems'] = $total;
194 $data['id'] .= '?' . http_build_query(['page' => $page]);
197 // When we hide our friends we will only show the pure number but don't allow more.
198 $show_contacts = empty($owner['hide-friends']);
200 // Allow fetching the contact list when the requester is part of the list.
201 if (($owner['page-flags'] == User::PAGE_FLAGS_PRVGROUP) && !empty($requester)) {
202 $show_contacts = DBA::exists('contact', ['nurl' => Strings::normaliseLink($requester), 'uid' => $owner['uid'], 'blocked' => false]);
205 if (!$show_contacts) {
206 if (!empty($cachekey)) {
207 DI::cache()->set($cachekey, $data, Duration::DAY);
214 $data['first'] = DI::baseUrl() . $modulePath . $owner['nickname'] . '?page=1';
216 $data['type'] = 'OrderedCollectionPage';
219 $contacts = DBA::select('contact', ['url'], $condition, ['limit' => [($page - 1) * 100, 100]]);
220 while ($contact = DBA::fetch($contacts)) {
221 $list[] = $contact['url'];
223 DBA::close($contacts);
225 if (count($list) == 100) {
226 $data['next'] = DI::baseUrl() . $modulePath . $owner['nickname'] . '?page=' . ($page + 1);
229 $data['partOf'] = DI::baseUrl() . $modulePath . $owner['nickname'];
231 $data['orderedItems'] = $list;
234 if (!empty($cachekey)) {
235 DI::cache()->set($cachekey, $data, Duration::DAY);
242 * Public posts for the given owner
244 * @param array $owner Owner array
245 * @param integer $page Page number
246 * @param boolean $nocache Wether to bypass caching
248 * @return array of posts
249 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
250 * @throws \ImagickException
252 public static function getFeatured(array $owner, int $page = null, bool $nocache = false): array
255 $cachekey = self::CACHEKEY_FEATURED . $owner['uid'];
256 $result = DI::cache()->get($cachekey);
257 if (!$nocache && !is_null($result)) {
262 $owner_cid = Contact::getIdForURL($owner['url'], 0, false);
264 $condition = ["`uri-id` IN (SELECT `uri-id` FROM `collection-view` WHERE `cid` = ? AND `type` = ?)",
265 $owner_cid, Post\Collection::FEATURED];
267 $condition = DBA::mergeConditions($condition, [
268 'uid' => $owner['uid'],
269 'author-id' => $owner_cid,
270 'private' => [Item::PUBLIC, Item::UNLISTED],
271 'gravity' => [Item::GRAVITY_PARENT, Item::GRAVITY_COMMENT],
272 'network' => Protocol::FEDERATED,
273 'parent-network' => Protocol::FEDERATED,
279 $count = Post::count($condition);
281 $data = ['@context' => ActivityPub::CONTEXT];
282 $data['id'] = DI::baseUrl() . '/featured/' . $owner['nickname'];
283 $data['type'] = 'OrderedCollection';
284 $data['totalItems'] = $count;
287 $data['id'] .= '?' . http_build_query(['page' => $page]);
291 $items = Post::select(['id'], $condition, ['limit' => 20, 'order' => ['created' => true]]);
293 $data['type'] = 'OrderedCollectionPage';
294 $items = Post::select(['id'], $condition, ['limit' => [($page - 1) * 20, 20], 'order' => ['created' => true]]);
298 while ($item = Post::fetch($items)) {
299 $activity = self::createActivityFromItem($item['id'], true);
300 if (!empty($activity)) {
306 if (count($list) == 20) {
307 $data['next'] = DI::baseUrl() . '/featured/' . $owner['nickname'] . '?page=' . ($page + 1);
311 $data['partOf'] = DI::baseUrl() . '/featured/' . $owner['nickname'];
314 $data['orderedItems'] = $list;
316 if (!empty($cachekey)) {
317 DI::cache()->set($cachekey, $data, Duration::DAY);
324 * Return the service array containing information the used software and it's url
326 * @return array with service data
328 public static function getService(): array
332 'name' => App::PLATFORM . " '" . App::CODENAME . "' " . App::VERSION . '-' . DB_UPDATE_VERSION,
333 'url' => DI::baseUrl()
338 * Return the ActivityPub profile of the given user
340 * @param int $uid User ID
341 * @return array with profile data
342 * @throws HTTPException\NotFoundException
343 * @throws HTTPException\InternalServerErrorException
345 public static function getProfile(int $uid): array
347 $owner = User::getOwnerDataById($uid);
348 if (!isset($owner['id'])) {
349 DI::logger()->error('Unable to find owner data for uid', ['uid' => $uid, 'callstack' => System::callstack(20)]);
350 throw new HTTPException\NotFoundException('User not found.');
353 $data = ['@context' => ActivityPub::CONTEXT];
354 $data['id'] = $owner['url'];
356 if (!empty($owner['guid'])) {
357 $data['diaspora:guid'] = $owner['guid'];
360 $data['type'] = ActivityPub::ACCOUNT_TYPES[$owner['account-type']];
363 $data['following'] = DI::baseUrl() . '/following/' . $owner['nick'];
364 $data['followers'] = DI::baseUrl() . '/followers/' . $owner['nick'];
365 $data['inbox'] = DI::baseUrl() . '/inbox/' . $owner['nick'];
366 $data['outbox'] = DI::baseUrl() . '/outbox/' . $owner['nick'];
367 $data['featured'] = DI::baseUrl() . '/featured/' . $owner['nick'];
369 $data['inbox'] = DI::baseUrl() . '/friendica/inbox';
372 $data['preferredUsername'] = $owner['nick'];
373 $data['name'] = $owner['name'];
375 if (!empty($owner['country-name'] . $owner['region'] . $owner['locality'])) {
376 $data['vcard:hasAddress'] = ['@type' => 'vcard:Home', 'vcard:country-name' => $owner['country-name'],
377 'vcard:region' => $owner['region'], 'vcard:locality' => $owner['locality']];
380 if (!empty($owner['about'])) {
381 $data['summary'] = BBCode::convertForUriId($owner['uri-id'] ?? 0, $owner['about'], BBCode::EXTERNAL);
384 if (!empty($owner['xmpp']) || !empty($owner['matrix'])) {
385 $data['vcard:hasInstantMessage'] = [];
387 if (!empty($owner['xmpp'])) {
388 $data['vcard:hasInstantMessage'][] = 'xmpp:' . $owner['xmpp'];
390 if (!empty($owner['matrix'])) {
391 $data['vcard:hasInstantMessage'][] = 'matrix:' . $owner['matrix'];
395 $data['url'] = $owner['url'];
396 $data['manuallyApprovesFollowers'] = in_array($owner['page-flags'], [User::PAGE_FLAGS_NORMAL, User::PAGE_FLAGS_PRVGROUP]);
397 $data['discoverable'] = (bool)$owner['net-publish'];
398 $data['publicKey'] = ['id' => $owner['url'] . '#main-key',
399 'owner' => $owner['url'],
400 'publicKeyPem' => $owner['pubkey']];
401 $data['endpoints'] = ['sharedInbox' => DI::baseUrl() . '/inbox'];
403 $data['icon'] = ['type' => 'Image', 'url' => User::getAvatarUrl($owner)];
405 $resourceid = Photo::ridFromURI($owner['photo']);
406 if (!empty($resourceid)) {
407 $photo = Photo::selectFirst(['type'], ["resource-id" => $resourceid]);
408 if (!empty($photo['type'])) {
409 $data['icon']['mediaType'] = $photo['type'];
413 if (!empty($owner['header'])) {
414 $data['image'] = ['type' => 'Image', 'url' => Contact::getHeaderUrlForId($owner['id'], '', $owner['updated'])];
416 $resourceid = Photo::ridFromURI($owner['header']);
417 if (!empty($resourceid)) {
418 $photo = Photo::selectFirst(['type'], ["resource-id" => $resourceid]);
419 if (!empty($photo['type'])) {
420 $data['image']['mediaType'] = $photo['type'];
427 foreach (DI::profileField()->selectByContactId(0, $uid) as $profile_field) {
429 'type' => 'PropertyValue',
430 'name' => $profile_field->label,
431 'value' => BBCode::convertForUriId($owner['uri-id'], $profile_field->value)
435 if (!empty($custom_fields)) {
436 $data['attachment'] = $custom_fields;
440 $data['generator'] = self::getService();
442 // tags: https://kitty.town/@inmysocks/100656097926961126.json
447 * Get a minimal actor array for the C2S API
449 * @param integer $cid
452 private static function getActorArrayByCid(int $cid): array
454 $contact = Contact::getById($cid);
456 'id' => $contact['url'],
457 'type' => $data['type'] = ActivityPub::ACCOUNT_TYPES[$contact['contact-type']],
458 'url' => $contact['alias'],
459 'preferredUsername' => $contact['nick'],
460 'name' => $contact['name'],
461 'icon' => ['type' => 'Image', 'url' => Contact::getAvatarUrlForId($cid, '', $contact['updated'])],
462 'image' => ['type' => 'Image', 'url' => Contact::getHeaderUrlForId($cid, '', $contact['updated'])],
463 'manuallyApprovesFollowers' => (bool)$contact['manually-approve'],
464 'discoverable' => !$contact['unsearchable'],
467 if (empty($data['url'])) {
468 $data['url'] = $data['id'];
475 * @param string $username
477 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
479 public static function getDeletedUser(string $username): array
482 '@context' => ActivityPub::CONTEXT,
483 'id' => DI::baseUrl() . '/profile/' . $username,
484 'type' => 'Tombstone',
485 'published' => DateTimeFormat::utcNow(DateTimeFormat::ATOM),
486 'updated' => DateTimeFormat::utcNow(DateTimeFormat::ATOM),
487 'deleted' => DateTimeFormat::utcNow(DateTimeFormat::ATOM),
492 * Returns an array with permissions of the thread parent of the given item array
495 * @param bool $is_forum_thread
497 * @return array with permissions
498 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
499 * @throws \ImagickException
501 private static function fetchPermissionBlockFromThreadParent(array $item, bool $is_forum_thread): array
503 if (empty($item['thr-parent-id'])) {
507 $parent = Post::selectFirstPost(['author-link'], ['uri-id' => $item['thr-parent-id']]);
508 if (empty($parent)) {
513 'to' => [$parent['author-link']],
519 $parent_profile = APContact::getByURL($parent['author-link']);
521 $item_profile = APContact::getByURL($item['author-link']);
522 $exclude[] = $item['author-link'];
524 if ($item['gravity'] == Item::GRAVITY_PARENT) {
525 $exclude[] = $item['owner-link'];
528 $type = [Tag::TO => 'to', Tag::CC => 'cc', Tag::BTO => 'bto', Tag::BCC => 'bcc'];
529 foreach (Tag::getByURIId($item['thr-parent-id'], [Tag::TO, Tag::CC, Tag::BTO, Tag::BCC]) as $receiver) {
530 if (!empty($parent_profile['followers']) && $receiver['url'] == $parent_profile['followers'] && !empty($item_profile['followers'])) {
531 if (!$is_forum_thread) {
532 $permissions[$type[$receiver['type']]][] = $item_profile['followers'];
534 } elseif (!in_array($receiver['url'], $exclude)) {
535 $permissions[$type[$receiver['type']]][] = $receiver['url'];
543 * Check if the given item id is from ActivityPub
545 * @param integer $item_id
546 * @return boolean "true" if the post is from ActivityPub
548 private static function isAPPost(int $item_id): bool
550 if (empty($item_id)) {
554 return Post::exists(['id' => $item_id, 'network' => Protocol::ACTIVITYPUB]);
558 * Creates an array of permissions from an item thread
560 * @param array $item Item array
561 * @param boolean $blindcopy addressing via "bcc" or "cc"?
562 * @param integer $last_id Last item id for adding receivers
564 * @return array with permission data
565 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
566 * @throws \ImagickException
568 private static function createPermissionBlockForItem(array $item, bool $blindcopy, int $last_id = 0): array
571 $last_id = $item['id'];
578 // Check if we should always deliver our stuff via BCC
579 if (!empty($item['uid'])) {
580 $owner = User::getOwnerDataById($item['uid']);
581 if (!empty($owner)) {
582 $always_bcc = $owner['hide-friends'];
583 $is_forum = ($owner['account-type'] == User::ACCOUNT_TYPE_COMMUNITY) && $owner['manually-approve'];
585 $profile = APContact::getByURL($owner['url'], false);
586 $follower = $profile['followers'] ?? '';
590 if (DI::config()->get('system', 'ap_always_bcc')) {
594 $parent = Post::selectFirst(['causer-link', 'post-reason'], ['id' => $item['parent']]);
595 if (!empty($parent) && ($parent['post-reason'] == Item::PR_ANNOUNCEMENT) && !empty($parent['causer-link'])) {
596 $profile = APContact::getByURL($parent['causer-link'], false);
597 $is_forum_thread = isset($profile['type']) && $profile['type'] == 'Group';
599 $is_forum_thread = false;
602 if (self::isAnnounce($item) || self::isAPPost($last_id)) {
603 // Will be activated in a later step
604 $networks = Protocol::FEDERATED;
606 // For now only send to these contacts:
607 $networks = [Protocol::ACTIVITYPUB, Protocol::OSTATUS];
610 $data = ['to' => [], 'cc' => [], 'bcc' => []];
612 if ($item['gravity'] == Item::GRAVITY_PARENT) {
613 $actor_profile = APContact::getByURL($item['owner-link']);
615 $actor_profile = APContact::getByURL($item['author-link']);
621 if ($is_forum_thread) {
622 foreach (Tag::getByURIId($item['parent-uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]) as $term) {
623 $profile = APContact::getByURL($term['url'], false);
624 if (!empty($profile) && ($profile['type'] == 'Group')) {
625 if ($term['type'] == Tag::EXCLUSIVE_MENTION) {
627 } elseif ($term['type'] == Tag::MENTION) {
634 $terms = Tag::getByURIId($item['uri-id'], [Tag::MENTION, Tag::IMPLICIT_MENTION, Tag::EXCLUSIVE_MENTION]);
636 if ($item['private'] != Item::PRIVATE) {
637 // Directly mention the original author upon a quoted reshare.
638 // Else just ensure that the original author receives the reshare.
639 $announce = self::getAnnounceArray($item);
640 if (!empty($announce['comment'])) {
641 $data['to'][] = $announce['actor']['url'];
642 } elseif (!empty($announce)) {
643 $data['cc'][] = $announce['actor']['url'];
646 $data = array_merge($data, self::fetchPermissionBlockFromThreadParent($item, $is_forum_thread));
648 // Check if the item is completely public or unlisted
649 if ($item['private'] == Item::PUBLIC) {
650 $data['to'][] = ActivityPub::PUBLIC_COLLECTION;
652 $data['cc'][] = ActivityPub::PUBLIC_COLLECTION;
655 foreach ($terms as $term) {
656 $profile = APContact::getByURL($term['url'], false);
657 if (!empty($profile)) {
658 if ($term['type'] == Tag::EXCLUSIVE_MENTION) {
660 if (!empty($profile['followers']) && ($profile['type'] == 'Group')) {
661 $data['cc'][] = $profile['followers'];
663 } elseif (($term['type'] == Tag::MENTION) && ($profile['type'] == 'Group')) {
666 $data['to'][] = $profile['url'];
670 $receiver_list = Item::enumeratePermissions($item, true);
672 foreach ($terms as $term) {
673 $cid = Contact::getIdForURL($term['url'], $item['uid']);
674 if (!empty($cid) && in_array($cid, $receiver_list)) {
675 $contact = DBA::selectFirst('contact', ['url', 'network', 'protocol', 'gsid'], ['id' => $cid, 'network' => Protocol::FEDERATED]);
676 if (!DBA::isResult($contact) || !self::isAPContact($contact, $networks)) {
680 $profile = APContact::getByURL($term['url'], false);
681 if (!empty($profile)) {
682 if ($term['type'] == Tag::EXCLUSIVE_MENTION) {
684 if (!empty($profile['followers']) && ($profile['type'] == 'Group')) {
685 $data['cc'][] = $profile['followers'];
687 } elseif (($term['type'] == Tag::MENTION) && ($profile['type'] == 'Group')) {
690 $data['to'][] = $profile['url'];
699 if ($is_forum && !$exclusive && !empty($follower)) {
700 $data['cc'][] = $follower;
701 } elseif (!$exclusive) {
702 foreach ($receiver_list as $receiver) {
703 $contact = DBA::selectFirst('contact', ['url', 'hidden', 'network', 'protocol', 'gsid'], ['id' => $receiver, 'network' => Protocol::FEDERATED]);
704 if (!DBA::isResult($contact) || !self::isAPContact($contact, $networks)) {
708 if (!empty($profile = APContact::getByURL($contact['url'], false))) {
709 if ($contact['hidden'] || $always_bcc) {
710 $data['bcc'][] = $profile['url'];
712 $data['cc'][] = $profile['url'];
719 if (!empty($item['parent'])) {
720 if ($item['private'] == Item::PRIVATE) {
721 $condition = ['parent' => $item['parent'], 'uri-id' => $item['thr-parent-id']];
723 $condition = ['parent' => $item['parent']];
725 $parents = Post::select(['id', 'author-link', 'owner-link', 'gravity', 'uri'], $condition, ['order' => ['id']]);
726 while ($parent = Post::fetch($parents)) {
727 if ($parent['gravity'] == Item::GRAVITY_PARENT) {
728 $profile = APContact::getByURL($parent['owner-link'], false);
729 if (!empty($profile)) {
730 if ($item['gravity'] != Item::GRAVITY_PARENT) {
731 // Comments to forums are directed to the forum
732 // But comments to forums aren't directed to the followers collection
733 // This rule is only valid when the actor isn't the forum.
734 // The forum needs to transmit their content to their followers.
735 if (($profile['type'] == 'Group') && ($profile['url'] != ($actor_profile['url'] ?? ''))) {
736 $data['to'][] = $profile['url'];
738 $data['cc'][] = $profile['url'];
739 if (($item['private'] != Item::PRIVATE) && !empty($actor_profile['followers']) && (!$exclusive || !$is_forum_thread)) {
740 $data['cc'][] = $actor_profile['followers'];
743 } elseif (!$exclusive && !$is_forum_thread) {
744 // Public thread parent post always are directed to the followers.
745 if ($item['private'] != Item::PRIVATE) {
746 $data['cc'][] = $actor_profile['followers'];
752 // Don't include data from future posts
753 if ($parent['id'] >= $last_id) {
757 $profile = APContact::getByURL($parent['author-link'], false);
758 if (!empty($profile)) {
759 if (($profile['type'] == 'Group') || ($parent['uri'] == $item['thr-parent'])) {
760 $data['to'][] = $profile['url'];
762 $data['cc'][] = $profile['url'];
766 DBA::close($parents);
769 $data['to'] = array_unique($data['to']);
770 $data['cc'] = array_unique($data['cc']);
771 $data['bcc'] = array_unique($data['bcc']);
773 if (($key = array_search($item['author-link'], $data['to'])) !== false) {
774 unset($data['to'][$key]);
777 if (($key = array_search($item['author-link'], $data['cc'])) !== false) {
778 unset($data['cc'][$key]);
781 if (($key = array_search($item['author-link'], $data['bcc'])) !== false) {
782 unset($data['bcc'][$key]);
785 foreach ($data['to'] as $to) {
786 if (($key = array_search($to, $data['cc'])) !== false) {
787 unset($data['cc'][$key]);
790 if (($key = array_search($to, $data['bcc'])) !== false) {
791 unset($data['bcc'][$key]);
795 foreach ($data['cc'] as $cc) {
796 if (($key = array_search($cc, $data['bcc'])) !== false) {
797 unset($data['bcc'][$key]);
801 $receivers = ['to' => array_values($data['to']), 'cc' => array_values($data['cc']), 'bcc' => array_values($data['bcc'])];
804 unset($receivers['bcc']);
807 foreach (['to' => Tag::TO, 'cc' => Tag::CC, 'bcc' => Tag::BCC] as $element => $type) {
808 if (!empty($receivers[$element])) {
809 foreach ($receivers[$element] as $receiver) {
810 if ($receiver == ActivityPub::PUBLIC_COLLECTION) {
811 $name = Receiver::PUBLIC_COLLECTION;
813 $name = trim(parse_url($receiver, PHP_URL_PATH), '/');
815 Tag::store($item['uri-id'], $type, $name, $receiver);
824 * Check if an inbox is archived
826 * @param string $url Inbox url
827 * @return boolean "true" if inbox is archived
829 public static function archivedInbox(string $url): bool
831 return DBA::exists('inbox-status', ['url' => $url, 'archive' => true]);
835 * Check if a given contact should be delivered via AP
837 * @param array $contact Contact array
838 * @param array $networks Array with networks
839 * @return bool Whether the used protocol matches ACTIVITYPUB
842 private static function isAPContact(array $contact, array $networks): bool
844 if (in_array($contact['network'], $networks) || ($contact['protocol'] == Protocol::ACTIVITYPUB)) {
848 return GServer::getProtocol($contact['gsid'] ?? 0) == Post\DeliveryData::ACTIVITYPUB;
852 * Fetches a list of inboxes of followers of a given user
854 * @param integer $uid User ID
855 * @param boolean $personal fetch personal inboxes
856 * @param boolean $all_ap Retrieve all AP enabled inboxes
857 * @return array of follower inboxes
858 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
859 * @throws \ImagickException
861 public static function fetchTargetInboxesforUser(int $uid, bool $personal = false, bool $all_ap = false): array
867 if (!empty($item['uid'])) {
868 $profile = User::getOwnerDataById($item['uid']);
869 if (!empty($profile)) {
870 $isforum = $profile['account-type'] == User::ACCOUNT_TYPE_COMMUNITY;
875 // Will be activated in a later step
876 $networks = Protocol::FEDERATED;
878 // For now only send to these contacts:
879 $networks = [Protocol::ACTIVITYPUB, Protocol::OSTATUS];
887 'network' => Protocol::FEDERATED,
891 $condition['rel'] = [Contact::FOLLOWER, Contact::FRIEND];
894 $contacts = DBA::select('contact', ['id', 'url', 'network', 'protocol', 'gsid'], $condition);
895 while ($contact = DBA::fetch($contacts)) {
896 if (!self::isAPContact($contact, $networks)) {
900 if ($isforum && ($contact['network'] == Protocol::DFRN)) {
904 if (Network::isUrlBlocked($contact['url'])) {
908 $profile = APContact::getByURL($contact['url'], false);
909 if (!empty($profile)) {
910 if (empty($profile['sharedinbox']) || $personal || Contact::isLocal($contact['url'])) {
911 $target = $profile['inbox'];
913 $target = $profile['sharedinbox'];
915 if (!self::archivedInbox($target)) {
916 $inboxes[$target][] = $contact['id'];
920 DBA::close($contacts);
926 * Fetches an array of inboxes for the given item and user
928 * @param array $item Item array
929 * @param integer $uid User ID
930 * @param boolean $personal fetch personal inboxes
931 * @param integer $last_id Last item id for adding receivers
932 * @return array with inboxes
933 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
934 * @throws \ImagickException
936 public static function fetchTargetInboxes(array $item, int $uid, bool $personal = false, int $last_id = 0): array
938 $permissions = self::createPermissionBlockForItem($item, true, $last_id);
939 if (empty($permissions)) {
945 if ($item['gravity'] == Item::GRAVITY_ACTIVITY) {
946 $item_profile = APContact::getByURL($item['author-link'], false);
948 $item_profile = APContact::getByURL($item['owner-link'], false);
951 if (empty($item_profile)) {
955 $profile_uid = User::getIdForURL($item_profile['url']);
957 foreach (['to', 'cc', 'bto', 'bcc'] as $element) {
958 if (empty($permissions[$element])) {
962 $blindcopy = in_array($element, ['bto', 'bcc']);
964 foreach ($permissions[$element] as $receiver) {
965 if (empty($receiver) || Network::isUrlBlocked($receiver)) {
969 if ($item_profile && ($receiver == $item_profile['followers']) && ($uid == $profile_uid)) {
970 $inboxes = array_merge($inboxes, self::fetchTargetInboxesforUser($uid, $personal, self::isAPPost($last_id)));
972 $profile = APContact::getByURL($receiver, false);
973 if (!empty($profile)) {
974 $contact = Contact::getByURLForUser($receiver, $uid, false, ['id']);
976 if (empty($profile['sharedinbox']) || $personal || $blindcopy || Contact::isLocal($receiver)) {
977 $target = $profile['inbox'];
979 $target = $profile['sharedinbox'];
981 if (!self::archivedInbox($target)) {
982 $inboxes[$target][] = $contact['id'] ?? 0;
993 * Creates an array in the structure of the item table for a given mail id
995 * @param integer $mail_id Mail id
999 public static function getItemArrayFromMail(int $mail_id, bool $use_title = false): array
1001 $mail = DBA::selectFirst('mail', [], ['id' => $mail_id]);
1002 if (!DBA::isResult($mail)) {
1006 $reply = DBA::selectFirst('mail', ['uri', 'uri-id', 'from-url'], ['parent-uri' => $mail['parent-uri'], 'reply' => false]);
1007 if (!DBA::isResult($reply)) {
1011 // Making the post more compatible for Mastodon by:
1012 // - Making it a note and not an article (no title)
1013 // - Moving the title into the "summary" field that is used as a "content warning"
1016 $mail['body'] = '[abstract]' . $mail['title'] . "[/abstract]\n" . $mail['body'];
1017 $mail['title'] = '';
1020 $mail['content-warning'] = '';
1021 $mail['author-link'] = $mail['owner-link'] = $mail['from-url'];
1022 $mail['owner-id'] = $mail['author-id'];
1023 $mail['allow_cid'] = '<'.$mail['contact-id'].'>';
1024 $mail['allow_gid'] = '';
1025 $mail['deny_cid'] = '';
1026 $mail['deny_gid'] = '';
1027 $mail['private'] = Item::PRIVATE;
1028 $mail['deleted'] = false;
1029 $mail['edited'] = $mail['created'];
1030 $mail['plink'] = DI::baseUrl() . '/message/' . $mail['id'];
1031 $mail['parent-uri'] = $reply['uri'];
1032 $mail['parent-uri-id'] = $reply['uri-id'];
1033 $mail['parent-author-id'] = Contact::getIdForURL($reply['from-url'], 0, false);
1034 $mail['gravity'] = ($mail['reply'] ? Item::GRAVITY_COMMENT: Item::GRAVITY_PARENT);
1035 $mail['event-type'] = '';
1036 $mail['language'] = '';
1037 $mail['parent'] = 0;
1043 * Creates an activity array for a given mail id
1045 * @param integer $mail_id
1046 * @param boolean $object_mode Is the activity item is used inside another object?
1048 * @return array of activity
1049 * @throws \Exception
1051 public static function createActivityFromMail(int $mail_id, bool $object_mode = false): array
1053 $mail = self::getItemArrayFromMail($mail_id);
1057 $object = self::createNote($mail);
1059 if (!$object_mode) {
1060 $data = ['@context' => ActivityPub::CONTEXT];
1065 $data['id'] = $mail['uri'] . '/Create';
1066 $data['type'] = 'Create';
1067 $data['actor'] = $mail['author-link'];
1068 $data['published'] = DateTimeFormat::utc($mail['created'] . '+00:00', DateTimeFormat::ATOM);
1069 $data['instrument'] = self::getService();
1070 $data = array_merge($data, self::createPermissionBlockForItem($mail, true));
1072 if (empty($data['to']) && !empty($data['cc'])) {
1073 $data['to'] = $data['cc'];
1076 if (empty($data['to']) && !empty($data['bcc'])) {
1077 $data['to'] = $data['bcc'];
1081 unset($data['bcc']);
1083 $object['to'] = $data['to'];
1084 $object['tag'] = [['type' => 'Mention', 'href' => $object['to'][0], 'name' => '']];
1086 unset($object['cc']);
1087 unset($object['bcc']);
1089 $data['directMessage'] = true;
1091 $data['object'] = $object;
1093 $owner = User::getOwnerDataById($mail['uid']);
1095 if (!$object_mode && !empty($owner)) {
1096 return LDSignature::sign($data, $owner);
1103 * Returns the activity type of a given item
1105 * @param array $item Item array
1106 * @return string with activity type
1107 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1108 * @throws \ImagickException
1110 private static function getTypeOfItem(array $item): string
1114 // Only check for a reshare, if it is a real reshare and no quoted reshare
1115 if (strpos($item['body'], '[share') === 0) {
1116 $announce = self::getAnnounceArray($item);
1117 $reshared = !empty($announce);
1122 } elseif ($item['verb'] == Activity::POST) {
1123 if ($item['created'] == $item['edited']) {
1128 } elseif ($item['verb'] == Activity::LIKE) {
1130 } elseif ($item['verb'] == Activity::DISLIKE) {
1132 } elseif ($item['verb'] == Activity::ATTEND) {
1134 } elseif ($item['verb'] == Activity::ATTENDNO) {
1136 } elseif ($item['verb'] == Activity::ATTENDMAYBE) {
1137 $type = 'TentativeAccept';
1138 } elseif ($item['verb'] == Activity::FOLLOW) {
1140 } elseif ($item['verb'] == Activity::TAG) {
1142 } elseif ($item['verb'] == Activity::ANNOUNCE) {
1152 * Creates the activity or fetches it from the cache
1154 * @param integer $item_id Item id
1155 * @param boolean $force Force new cache entry
1156 * @return array|false activity or false on failure
1157 * @throws \Exception
1159 public static function createCachedActivityFromItem(int $item_id, bool $force = false, bool $object_mode = false)
1161 $cachekey = 'APDelivery:createActivity:' . $item_id . ':' . (int)$object_mode;
1164 $data = DI::cache()->get($cachekey);
1165 if (!is_null($data)) {
1170 $data = self::createActivityFromItem($item_id, $object_mode);
1172 DI::cache()->set($cachekey, $data, Duration::QUARTER_HOUR);
1177 * Creates an activity array for a given item id
1179 * @param integer $item_id
1180 * @param boolean $object_mode Is the activity item is used inside another object?
1181 * @param boolean $api_mode "true" if used for the API
1182 * @return false|array
1183 * @throws \Exception
1185 public static function createActivityFromItem(int $item_id, bool $object_mode = false, $api_mode = false)
1187 $condition = ['id' => $item_id];
1189 $condition['parent-network'] = Protocol::NATIVE_SUPPORT;
1191 Logger::info('Fetching activity', $condition);
1192 $item = Post::selectFirst(Item::DELIVER_FIELDLIST, $condition);
1193 if (!DBA::isResult($item)) {
1196 return self::createActivityFromArray($item, $object_mode, $api_mode);
1200 * Creates an activity array for a given URI-Id and uid
1202 * @param integer $uri_id
1203 * @param integer $uid
1204 * @param boolean $object_mode Is the activity item is used inside another object?
1205 * @param boolean $api_mode "true" if used for the API
1206 * @return false|array
1207 * @throws \Exception
1209 public static function createActivityFromUriId(int $uri_id, int $uid, bool $object_mode = false, $api_mode = false)
1211 $condition = ['uri-id' => $uri_id, 'uid' => [0, $uid]];
1213 $condition['parent-network'] = Protocol::NATIVE_SUPPORT;
1215 Logger::info('Fetching activity', $condition);
1216 $item = Post::selectFirst(Item::DELIVER_FIELDLIST, $condition, ['order' => ['uid' => true]]);
1217 if (!DBA::isResult($item)) {
1221 return self::createActivityFromArray($item, $object_mode, $api_mode);
1225 * Creates an activity array for a given item id
1227 * @param integer $item_id
1228 * @param boolean $object_mode Is the activity item is used inside another object?
1229 * @param boolean $api_mode "true" if used for the API
1230 * @return false|array
1231 * @throws \Exception
1233 private static function createActivityFromArray(array $item, bool $object_mode = false, $api_mode = false)
1235 if (!$api_mode && !$item['deleted'] && $item['network'] == Protocol::ACTIVITYPUB) {
1236 $data = Post\Activity::getByURIId($item['uri-id']);
1237 if (!$item['origin'] && !empty($data)) {
1238 if (!$object_mode) {
1239 Logger::info('Return stored conversation', ['item' => $item['id']]);
1241 } elseif (!empty($data['object'])) {
1242 Logger::info('Return stored conversation object', ['item' => $item['id']]);
1243 return $data['object'];
1248 if (!$api_mode && !$item['origin']) {
1249 Logger::debug('Post is not ours and is not stored', ['id' => $item['id'], 'uri-id' => $item['uri-id']]);
1253 $type = self::getTypeOfItem($item);
1255 if (!$object_mode) {
1256 $data = ['@context' => $context ?? ActivityPub::CONTEXT];
1258 if ($item['deleted'] && ($item['gravity'] == Item::GRAVITY_ACTIVITY)) {
1260 } elseif ($item['deleted']) {
1267 if ($type == 'Delete') {
1268 $data['id'] = Item::newURI($item['guid']) . '/' . $type;;
1269 } elseif (($item['gravity'] == Item::GRAVITY_ACTIVITY) && ($type != 'Undo')) {
1270 $data['id'] = $item['uri'];
1272 $data['id'] = $item['uri'] . '/' . $type;
1275 $data['type'] = $type;
1277 if (($type != 'Announce') || ($item['gravity'] != Item::GRAVITY_PARENT)) {
1278 $link = $item['author-link'];
1279 $id = $item['author-id'];
1281 $link = $item['owner-link'];
1282 $id = $item['owner-id'];
1286 $data['actor'] = self::getActorArrayByCid($id);
1288 $data['actor'] = $link;
1291 $data['published'] = DateTimeFormat::utc($item['created'] . '+00:00', DateTimeFormat::ATOM);
1293 $data['instrument'] = self::getService();
1295 $data = array_merge($data, self::createPermissionBlockForItem($item, false));
1297 if (in_array($data['type'], ['Create', 'Update', 'Delete'])) {
1298 $data['object'] = self::createNote($item, $api_mode);
1299 } elseif ($data['type'] == 'Add') {
1300 $data = self::createAddTag($item, $data);
1301 } elseif ($data['type'] == 'Announce') {
1302 if ($item['verb'] == ACTIVITY::ANNOUNCE) {
1303 $data['object'] = $item['thr-parent'];
1305 $data = self::createAnnounce($item, $data, $api_mode);
1307 } elseif ($data['type'] == 'Follow') {
1308 $data['object'] = $item['parent-uri'];
1309 } elseif ($data['type'] == 'Undo') {
1310 $data['object'] = self::createActivityFromItem($item['id'], true);
1312 $data['diaspora:guid'] = $item['guid'];
1313 if (!empty($item['signed_text'])) {
1314 $data['diaspora:like'] = $item['signed_text'];
1316 $data['object'] = $item['thr-parent'];
1319 if (!empty($item['contact-uid'])) {
1320 $uid = $item['contact-uid'];
1322 $uid = $item['uid'];
1325 Logger::info('Fetched activity', ['item' => $item['id'], 'uid' => $uid]);
1327 // We only sign our own activities
1328 if (!$api_mode && !$object_mode && $item['origin']) {
1329 $owner = User::getOwnerDataById($uid);
1330 return LDSignature::sign($data, $owner);
1335 /// @todo Create "conversation" entry
1339 * Creates a location entry for a given item array
1341 * @param array $item Item array
1342 * @return array with location array
1344 private static function createLocation(array $item): array
1346 $location = ['type' => 'Place'];
1348 if (!empty($item['location'])) {
1349 $location['name'] = $item['location'];
1354 if (empty($item['coord'])) {
1355 $coord = Map::getCoordinates($item['location']);
1357 $coords = explode(' ', $item['coord']);
1358 if (count($coords) == 2) {
1359 $coord = ['lat' => $coords[0], 'lon' => $coords[1]];
1363 if (!empty($coord['lat']) && !empty($coord['lon'])) {
1364 $location['latitude'] = $coord['lat'];
1365 $location['longitude'] = $coord['lon'];
1372 * Returns a tag array for a given item array
1374 * @param array $item Item array
1375 * @param string $quote_url Url of the attached quote link
1376 * @return array of tags
1377 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1379 private static function createTagList(array $item, string $quote_url): array
1383 $terms = Tag::getByURIId($item['uri-id'], [Tag::HASHTAG, Tag::MENTION, Tag::IMPLICIT_MENTION, Tag::EXCLUSIVE_MENTION]);
1384 foreach ($terms as $term) {
1385 if ($term['type'] == Tag::HASHTAG) {
1386 $url = DI::baseUrl() . '/search?tag=' . urlencode($term['name']);
1387 $tags[] = ['type' => 'Hashtag', 'href' => $url, 'name' => '#' . $term['name']];
1389 $contact = Contact::getByURL($term['url'], false, ['addr']);
1390 if (empty($contact)) {
1393 if (!empty($contact['addr'])) {
1394 $mention = '@' . $contact['addr'];
1396 $mention = '@' . $term['url'];
1399 $tags[] = ['type' => 'Mention', 'href' => $term['url'], 'name' => $mention];
1403 $announce = self::getAnnounceArray($item);
1404 // Mention the original author upon commented reshares
1405 if (!empty($announce['comment'])) {
1406 $tags[] = ['type' => 'Mention', 'href' => $announce['actor']['url'], 'name' => '@' . $announce['actor']['addr']];
1409 // @see https://codeberg.org/fediverse/fep/src/branch/main/feps/fep-e232.md
1410 if (!empty($quote_url)) {
1411 // Currently deactivated because of compatibility issues with Pleroma
1413 // 'type' => 'Link',
1414 // 'mediaType' => 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"',
1415 // 'href' => $quote_url,
1416 // 'name' => '♲ ' . BBCode::convertForUriId($item['uri-id'], $quote_url, BBCode::ACTIVITYPUB)
1424 * Adds attachment data to the JSON document
1426 * @param array $item Data of the item that is to be posted
1428 * @return array with attachment data
1429 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1431 private static function createAttachmentList(array $item): array
1436 foreach (Post\Media::getByURIId($item['uri-id'], [Post\Media::AUDIO, Post\Media::IMAGE, Post\Media::VIDEO, Post\Media::DOCUMENT, Post\Media::TORRENT]) as $attachment) {
1437 if (in_array($attachment['url'], $urls)) {
1440 $urls[] = $attachment['url'];
1442 $attach = ['type' => 'Document',
1443 'mediaType' => $attachment['mimetype'],
1444 'url' => $attachment['url'],
1445 'name' => $attachment['description']];
1447 if (!empty($attachment['height'])) {
1448 $attach['height'] = $attachment['height'];
1451 if (!empty($attachment['width'])) {
1452 $attach['width'] = $attachment['width'];
1455 if (!empty($attachment['preview'])) {
1456 $attach['image'] = $attachment['preview'];
1459 $attachments[] = $attach;
1462 return $attachments;
1466 * Callback function to replace a Friendica style mention in a mention for a summary
1468 * @param array $match Matching values for the callback
1469 * @return string Replaced mention
1470 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1472 private static function mentionAddrCallback(array $match): string
1474 if (empty($match[1])) {
1478 $data = Contact::getByURL($match[1], false, ['addr']);
1479 if (empty($data['addr'])) {
1483 return '@' . $data['addr'];
1487 * Remove image elements since they are added as attachment
1489 * @param string $body HTML code
1490 * @return string with removed images
1492 private static function removePictures(string $body): string
1494 return BBCode::performWithEscapedTags($body, ['code', 'noparse', 'nobb', 'pre'], function ($text) {
1495 // Simplify image codes
1496 $text = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $text);
1497 $text = preg_replace("/\[img\=(.*?)\](.*?)\[\/img\]/ism", '[img]$1[/img]', $text);
1499 // Now remove local links
1500 $text = preg_replace_callback(
1501 '/\[url=([^\[\]]*)\]\[img\](.*)\[\/img\]\[\/url\]/Usi',
1503 // We remove the link when it is a link to a local photo page
1504 if (Photo::isLocalPage($match[1])) {
1507 // otherwise we just return the link
1508 return '[url]' . $match[1] . '[/url]';
1513 // Remove all pictures
1514 return preg_replace("/\[img\]([^\[\]]*)\[\/img\]/Usi", '', $text);
1519 * Returns if the post contains sensitive content ("nsfw")
1521 * @param integer $uri_id URI id
1522 * @return boolean Whether URI id was found
1523 * @throws \Exception
1525 private static function isSensitive(int $uri_id): bool
1527 return DBA::exists('tag-view', ['uri-id' => $uri_id, 'name' => 'nsfw', 'type' => Tag::HASHTAG]);
1531 * Creates event data
1533 * @param array $item Item array
1534 * @return array with the event data
1535 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1537 private static function createEvent(array $item): array
1540 $event['name'] = $item['event-summary'];
1541 $event['content'] = BBCode::convertForUriId($item['uri-id'], $item['event-desc'], BBCode::ACTIVITYPUB);
1542 $event['startTime'] = DateTimeFormat::utc($item['event-start'], 'c');
1544 if (!$item['event-nofinish']) {
1545 $event['endTime'] = DateTimeFormat::utc($item['event-finish'], 'c');
1548 if (!empty($item['event-location'])) {
1549 $item['location'] = $item['event-location'];
1550 $event['location'] = self::createLocation($item);
1553 // 2021.12: Backward compatibility value, all the events now "adjust" to the viewer timezone
1554 $event['dfrn:adjust'] = true;
1560 * Creates a note/article object array
1562 * @param array $item
1563 * @param bool $api_mode
1564 * @return array with the object data
1565 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1566 * @throws \ImagickException
1568 public static function createNote(array $item, bool $api_mode = false): array
1574 // We are treating posts differently when they are directed to a community.
1575 // This is done to better support Lemmy. Most of the changes should work with other systems as well.
1576 // But to not risk compatibility issues we currently perform the changes only for communities.
1577 if ($item['gravity'] == Item::GRAVITY_PARENT) {
1578 $isCommunityPost = !empty(Tag::getByURIId($item['uri-id'], [Tag::EXCLUSIVE_MENTION]));
1579 $links = Post\Media::getByURIId($item['uri-id'], [Post\Media::HTML]);
1580 if ($isCommunityPost && (count($links) == 1)) {
1581 $link = $links[0]['url'];
1584 $isCommunityPost = false;
1587 if ($item['event-type'] == 'event') {
1589 } elseif (!empty($item['title'])) {
1590 if (!$isCommunityPost || empty($link)) {
1593 // "Page" is used by Lemmy for posts that contain an external link
1600 if ($item['deleted']) {
1601 $type = 'Tombstone';
1605 $data['id'] = $item['uri'];
1606 $data['type'] = $type;
1608 if ($item['deleted']) {
1612 $data['summary'] = BBCode::toPlaintext(BBCode::getAbstract($item['body'], Protocol::ACTIVITYPUB));
1614 if ($item['uri'] != $item['thr-parent']) {
1615 $data['inReplyTo'] = $item['thr-parent'];
1617 $data['inReplyTo'] = null;
1620 $data['diaspora:guid'] = $item['guid'];
1621 $data['published'] = DateTimeFormat::utc($item['created'] . '+00:00', DateTimeFormat::ATOM);
1623 if ($item['created'] != $item['edited']) {
1624 $data['updated'] = DateTimeFormat::utc($item['edited'] . '+00:00', DateTimeFormat::ATOM);
1627 $data['url'] = $link ?? $item['plink'];
1629 $data['attributedTo'] = self::getActorArrayByCid($item['author-id']);
1631 $data['attributedTo'] = $item['author-link'];
1633 $data['sensitive'] = self::isSensitive($item['uri-id']);
1635 if (!empty($item['conversation']) && ($item['conversation'] != './')) {
1636 $data['conversation'] = $data['context'] = $item['conversation'];
1639 if (!empty($item['title'])) {
1640 $data['name'] = BBCode::toPlaintext($item['title'], false);
1643 $permission_block = self::createPermissionBlockForItem($item, false);
1645 $real_quote = false;
1647 $item = Post\Media::addHTMLAttachmentToItem($item);
1649 $body = $item['body'];
1651 if ($type == 'Note') {
1652 $body = $item['raw-body'] ?? self::removePictures($body);
1656 * @todo Improve the automated summary
1657 * This part is currently deactivated. The automated summary seems to be more
1658 * confusing than helping. But possibly we will find a better way.
1659 * So the code is left here for now as a reminder
1661 * } elseif (($type == 'Article') && empty($data['summary'])) {
1662 * $regexp = "/[@!]\[url\=([^\[\]]*)\].*?\[\/url\]/ism";
1663 * $summary = preg_replace_callback($regexp, [self::class, 'mentionAddrCallback'], $body);
1664 * $data['summary'] = BBCode::toPlaintext(Plaintext::shorten(self::removePictures($summary), 1000));
1668 if (empty($item['uid']) || !Feature::isEnabled($item['uid'], 'explicit_mentions')) {
1669 $body = self::prependMentions($body, $item['uri-id'], $item['author-link']);
1672 if ($type == 'Event') {
1673 $data = array_merge($data, self::createEvent($item));
1675 if ($isCommunityPost) {
1676 // For community posts we remove the visible "!user@domain.tld".
1677 // This improves the look at systems like Lemmy.
1678 // Also in the future we should control the community delivery via other methods.
1679 $body = preg_replace("/!\[url\=[^\[\]]*\][^\[\]]*\[\/url\]/ism", '', $body);
1682 if ($type == 'Page') {
1683 // When we transmit "Page" posts we have to remove the attachment.
1684 // The attachment contains the link that we already transmit in the "url" field.
1685 $body = BBCode::removeAttachment($body);
1688 $body = BBCode::setMentionsToNicknames($body);
1690 if (!empty($item['quote-uri-id'])) {
1691 if (Post::exists(['uri-id' => $item['quote-uri-id'], 'network' => [Protocol::ACTIVITYPUB, Protocol::DFRN]])) {
1693 $data['quoteUrl'] = $item['quote-uri'];
1694 $body = DI::contentItem()->addShareLink($body, $item['quote-uri-id']);
1696 $body = DI::contentItem()->addSharedPost($item, $body);
1700 $data['content'] = BBCode::convertForUriId($item['uri-id'], $body, BBCode::ACTIVITYPUB);
1703 // The regular "content" field does contain a minimized HTML. This is done since systems like
1704 // Mastodon has got problems with - for example - embedded pictures.
1705 // The contentMap does contain the unmodified HTML.
1706 $language = self::getLanguage($item);
1707 if (!empty($language)) {
1708 $richbody = BBCode::setMentionsToNicknames($item['body'] ?? '');
1709 $richbody = Post\Media::removeFromEndOfBody($richbody);
1710 if (!empty($item['quote-uri-id'])) {
1712 $richbody = DI::contentItem()->addShareLink($richbody, $item['quote-uri-id']);
1714 $richbody = DI::contentItem()->addSharedPost($item, $richbody);
1717 $richbody = BBCode::replaceAttachment($richbody);
1719 $data['contentMap'][$language] = BBCode::convertForUriId($item['uri-id'], $richbody, BBCode::EXTERNAL);
1722 if (!empty($item['quote-uri-id'])) {
1723 $source = DI::contentItem()->addSharedPost($item, $item['body']);
1725 $source = $item['body'];
1728 $data['source'] = ['content' => $source, 'mediaType' => "text/bbcode"];
1730 if (!empty($item['signed_text']) && ($item['uri'] != $item['thr-parent'])) {
1731 $data['diaspora:comment'] = $item['signed_text'];
1734 $data['attachment'] = self::createAttachmentList($item);
1735 $data['tag'] = self::createTagList($item, $data['quoteUrl'] ?? '');
1737 if (empty($data['location']) && (!empty($item['coord']) || !empty($item['location']))) {
1738 $data['location'] = self::createLocation($item);
1741 if (!empty($item['app'])) {
1742 $data['generator'] = ['type' => 'Application', 'name' => $item['app']];
1745 $data = array_merge($data, $permission_block);
1751 * Fetches the language from the post, the user or the system.
1753 * @param array $item
1754 * @return string language string
1756 private static function getLanguage(array $item): string
1758 // Try to fetch the language from the post itself
1759 if (!empty($item['language'])) {
1760 $languages = array_keys(json_decode($item['language'], true));
1761 if (!empty($languages[0])) {
1762 return $languages[0];
1766 // Otherwise use the user's language
1767 if (!empty($item['uid'])) {
1768 $user = DBA::selectFirst('user', ['language'], ['uid' => $item['uid']]);
1769 if (!empty($user['language'])) {
1770 return $user['language'];
1774 // And finally just use the system language
1775 return DI::config()->get('system', 'language');
1779 * Creates an an "add tag" entry
1781 * @param array $item Item array
1782 * @param array $activity activity data
1783 * @return array with activity data for adding tags
1784 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1785 * @throws \ImagickException
1787 private static function createAddTag(array $item, array $activity): array
1789 $object = XML::parseString($item['object']);
1790 $target = XML::parseString($item['target']);
1792 $activity['diaspora:guid'] = $item['guid'];
1793 $activity['actor'] = $item['author-link'];
1794 $activity['target'] = (string)$target->id;
1795 $activity['summary'] = BBCode::toPlaintext($item['body']);
1796 $activity['object'] = ['id' => (string)$object->id, 'type' => 'tag', 'name' => (string)$object->title, 'content' => (string)$object->content];
1802 * Creates an announce object entry
1804 * @param array $item Item array
1805 * @param array $activity activity data
1806 * @param bool $api_mode
1807 * @return array with activity data
1808 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1809 * @throws \ImagickException
1811 private static function createAnnounce(array $item, array $activity, bool $api_mode = false): array
1813 $orig_body = $item['body'];
1814 $announce = self::getAnnounceArray($item);
1815 if (empty($announce)) {
1816 $activity['type'] = 'Create';
1817 $activity['object'] = self::createNote($item, $api_mode);
1821 if (empty($announce['comment'])) {
1822 // Pure announce, without a quote
1823 $activity['type'] = 'Announce';
1824 $activity['object'] = $announce['object']['uri'];
1829 $activity['type'] = 'Create';
1830 $item['body'] = $announce['comment'] . "\n" . $announce['object']['plink'];
1831 $activity['object'] = self::createNote($item, $api_mode);
1833 /// @todo Finally decide how to implement this in AP. This is a possible way:
1834 $activity['object']['attachment'][] = self::createNote($announce['object']);
1836 $activity['object']['source']['content'] = $orig_body;
1841 * Return announce related data if the item is an announce
1843 * @param array $item
1844 * @return array Announcement array
1846 private static function getAnnounceArray(array $item): array
1848 $reshared = DI::contentItem()->getSharedPost($item, Item::DELIVER_FIELDLIST);
1849 if (empty($reshared)) {
1853 if (!in_array($reshared['post']['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
1857 $profile = APContact::getByURL($reshared['post']['author-link'], false);
1858 if (empty($profile)) {
1862 return ['object' => $reshared['post'], 'actor' => $profile, 'comment' => $reshared['comment']];
1866 * Checks if the provided item array is an announce
1868 * @param array $item Item array
1869 * @return boolean Whether item is an announcement
1871 public static function isAnnounce(array $item): bool
1873 if (!empty($item['verb']) && ($item['verb'] == Activity::ANNOUNCE)) {
1877 $announce = self::getAnnounceArray($item);
1878 if (empty($announce)) {
1882 return empty($announce['comment']);
1886 * Creates an activity id for a given contact id
1888 * @param integer $cid Contact ID of target
1890 * @return bool|string activity id
1892 public static function activityIDFromContact(int $cid)
1894 $contact = DBA::selectFirst('contact', ['uid', 'id', 'created'], ['id' => $cid]);
1895 if (!DBA::isResult($contact)) {
1899 $hash = hash('ripemd128', $contact['uid'].'-'.$contact['id'].'-'.$contact['created']);
1900 $uuid = substr($hash, 0, 8). '-' . substr($hash, 8, 4) . '-' . substr($hash, 12, 4) . '-' . substr($hash, 16, 4) . '-' . substr($hash, 20, 12);
1901 return DI::baseUrl() . '/activity/' . $uuid;
1905 * Transmits a contact suggestion to a given inbox
1907 * @param array $owner Sender owner-view record
1908 * @param string $inbox Target inbox
1909 * @param integer $suggestion_id Suggestion ID
1910 * @return boolean was the transmission successful?
1911 * @throws \Exception
1913 public static function sendContactSuggestion(array $owner, string $inbox, int $suggestion_id): bool
1915 $suggestion = DI::fsuggest()->selectOneById($suggestion_id);
1918 '@context' => ActivityPub::CONTEXT,
1919 'id' => DI::baseUrl() . '/activity/' . System::createGUID(),
1920 'type' => 'Announce',
1921 'actor' => $owner['url'],
1922 'object' => $suggestion->url,
1923 'content' => $suggestion->note,
1924 'instrument' => self::getService(),
1925 'to' => [ActivityPub::PUBLIC_COLLECTION],
1929 $signed = LDSignature::sign($data, $owner);
1931 Logger::info('Deliver profile deletion for user ' . $owner['uid'] . ' to ' . $inbox . ' via ActivityPub');
1932 return HTTPSignature::transmit($signed, $inbox, $owner);
1936 * Transmits a profile relocation to a given inbox
1938 * @param array $owner Sender owner-view record
1939 * @param string $inbox Target inbox
1940 * @return boolean was the transmission successful?
1941 * @throws \Exception
1943 public static function sendProfileRelocation(array $owner, string $inbox): bool
1946 '@context' => ActivityPub::CONTEXT,
1947 'id' => DI::baseUrl() . '/activity/' . System::createGUID(),
1948 'type' => 'dfrn:relocate',
1949 'actor' => $owner['url'],
1950 'object' => $owner['url'],
1951 'published' => DateTimeFormat::utcNow(DateTimeFormat::ATOM),
1952 'instrument' => self::getService(),
1953 'to' => [ActivityPub::PUBLIC_COLLECTION],
1957 $signed = LDSignature::sign($data, $owner);
1959 Logger::info('Deliver profile relocation for user ' . $owner['uid'] . ' to ' . $inbox . ' via ActivityPub');
1960 return HTTPSignature::transmit($signed, $inbox, $owner);
1964 * Transmits a profile deletion to a given inbox
1966 * @param array $owner Sender owner-view record
1967 * @param string $inbox Target inbox
1968 * @return boolean was the transmission successful?
1969 * @throws \Exception
1971 public static function sendProfileDeletion(array $owner, string $inbox): bool
1973 if (empty($owner['uprvkey'])) {
1974 Logger::error('No private key for owner found, the deletion message cannot be processed.', ['user' => $owner['uid']]);
1978 $data = ['@context' => ActivityPub::CONTEXT,
1979 'id' => DI::baseUrl() . '/activity/' . System::createGUID(),
1981 'actor' => $owner['url'],
1982 'object' => $owner['url'],
1983 'published' => DateTimeFormat::utcNow(DateTimeFormat::ATOM),
1984 'instrument' => self::getService(),
1985 'to' => [ActivityPub::PUBLIC_COLLECTION],
1988 $signed = LDSignature::sign($data, $owner);
1990 Logger::info('Deliver profile deletion for user ' . $owner['uid'] . ' to ' . $inbox . ' via ActivityPub');
1991 return HTTPSignature::transmit($signed, $inbox, $owner);
1995 * Transmits a profile change to a given inbox
1997 * @param array $owner Sender owner-view record
1998 * @param string $inbox Target inbox
1999 * @return boolean was the transmission successful?
2000 * @throws HTTPException\InternalServerErrorException
2001 * @throws HTTPException\NotFoundException
2002 * @throws \ImagickException
2004 public static function sendProfileUpdate(array $owner, string $inbox): bool
2006 $profile = APContact::getByURL($owner['url']);
2008 $data = ['@context' => ActivityPub::CONTEXT,
2009 'id' => DI::baseUrl() . '/activity/' . System::createGUID(),
2011 'actor' => $owner['url'],
2012 'object' => self::getProfile($owner['uid']),
2013 'published' => DateTimeFormat::utcNow(DateTimeFormat::ATOM),
2014 'instrument' => self::getService(),
2015 'to' => [$profile['followers']],
2018 $signed = LDSignature::sign($data, $owner);
2020 Logger::info('Deliver profile update for user ' . $owner['uid'] . ' to ' . $inbox . ' via ActivityPub');
2021 return HTTPSignature::transmit($signed, $inbox, $owner);
2025 * Transmits a given activity to a target
2027 * @param string $activity Type name
2028 * @param string $target Target profile
2029 * @param integer $uid User ID
2030 * @param string $id Activity-identifier
2032 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2033 * @throws \ImagickException
2034 * @throws \Exception
2036 public static function sendActivity(string $activity, string $target, int $uid, string $id = ''): bool
2038 $profile = APContact::getByURL($target);
2039 if (empty($profile['inbox'])) {
2040 Logger::warning('No inbox found for target', ['target' => $target, 'profile' => $profile]);
2044 $owner = User::getOwnerDataById($uid);
2045 if (empty($owner)) {
2046 Logger::warning('No user found for actor, aborting', ['uid' => $uid]);
2051 $id = DI::baseUrl() . '/activity/' . System::createGUID();
2055 '@context' => ActivityPub::CONTEXT,
2057 'type' => $activity,
2058 'actor' => $owner['url'],
2059 'object' => $profile['url'],
2060 'instrument' => self::getService(),
2061 'to' => [$profile['url']],
2064 Logger::info('Sending activity ' . $activity . ' to ' . $target . ' for user ' . $uid);
2066 $signed = LDSignature::sign($data, $owner);
2067 return HTTPSignature::transmit($signed, $profile['inbox'], $owner);
2071 * Transmits a "follow object" activity to a target
2072 * This is a preparation for sending automated "follow" requests when receiving "Announce" messages
2074 * @param string $object Object URL
2075 * @param string $target Target profile
2076 * @param integer $uid User ID
2078 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2079 * @throws \ImagickException
2080 * @throws \Exception
2082 public static function sendFollowObject(string $object, string $target, int $uid = 0): bool
2084 $profile = APContact::getByURL($target);
2085 if (empty($profile['inbox'])) {
2086 Logger::warning('No inbox found for target', ['target' => $target, 'profile' => $profile]);
2091 // We need to use some user as a sender. It doesn't care who it will send. We will use an administrator account.
2092 $admin = User::getFirstAdmin(['uid']);
2094 Logger::warning('No available admin user for transmission', ['target' => $target]);
2098 $uid = $admin['uid'];
2101 $condition = ['verb' => Activity::FOLLOW, 'uid' => 0, 'parent-uri' => $object,
2102 'author-id' => Contact::getPublicIdByUserId($uid)];
2103 if (Post::exists($condition)) {
2104 Logger::info('Follow for ' . $object . ' for user ' . $uid . ' does already exist.');
2108 $owner = User::getOwnerDataById($uid);
2111 '@context' => ActivityPub::CONTEXT,
2112 'id' => DI::baseUrl() . '/activity/' . System::createGUID(),
2114 'actor' => $owner['url'],
2115 'object' => $object,
2116 'instrument' => self::getService(),
2117 'to' => [$profile['url']],
2120 Logger::info('Sending follow ' . $object . ' to ' . $target . ' for user ' . $uid);
2122 $signed = LDSignature::sign($data, $owner);
2123 return HTTPSignature::transmit($signed, $profile['inbox'], $owner);
2127 * Transmit a message that the contact request had been accepted
2129 * @param string $target Target profile
2130 * @param string $id Object id
2131 * @param integer $uid User ID
2133 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2134 * @throws \ImagickException
2136 public static function sendContactAccept(string $target, string $id, int $uid)
2138 $profile = APContact::getByURL($target);
2139 if (empty($profile['inbox'])) {
2140 Logger::warning('No inbox found for target', ['target' => $target, 'profile' => $profile]);
2144 $owner = User::getOwnerDataById($uid);
2146 Logger::notice('No user found for actor', ['uid' => $uid]);
2151 '@context' => ActivityPub::CONTEXT,
2152 'id' => DI::baseUrl() . '/activity/' . System::createGUID(),
2154 'actor' => $owner['url'],
2158 'actor' => $profile['url'],
2159 'object' => $owner['url']
2161 'instrument' => self::getService(),
2162 'to' => [$profile['url']],
2165 Logger::debug('Sending accept to ' . $target . ' for user ' . $uid . ' with id ' . $id);
2167 $signed = LDSignature::sign($data, $owner);
2168 HTTPSignature::transmit($signed, $profile['inbox'], $owner);
2172 * Reject a contact request or terminates the contact relation
2174 * @param string $target Target profile
2175 * @param string $objectId Object id
2176 * @param array $owner Sender owner-view record
2177 * @return bool Operation success
2178 * @throws HTTPException\InternalServerErrorException
2179 * @throws \ImagickException
2181 public static function sendContactReject(string $target, string $objectId, array $owner): bool
2183 $profile = APContact::getByURL($target);
2184 if (empty($profile['inbox'])) {
2185 Logger::warning('No inbox found for target', ['target' => $target, 'profile' => $profile]);
2190 '@context' => ActivityPub::CONTEXT,
2191 'id' => DI::baseUrl() . '/activity/' . System::createGUID(),
2193 'actor' => $owner['url'],
2197 'actor' => $profile['url'],
2198 'object' => $owner['url']
2200 'instrument' => self::getService(),
2201 'to' => [$profile['url']],
2204 Logger::debug('Sending reject to ' . $target . ' for user ' . $owner['uid'] . ' with id ' . $objectId);
2206 $signed = LDSignature::sign($data, $owner);
2207 return HTTPSignature::transmit($signed, $profile['inbox'], $owner);
2211 * Transmits a message that we don't want to follow this contact anymore
2213 * @param string $target Target profile
2214 * @param integer $cid Contact id
2215 * @param array $owner Sender owner-view record
2216 * @return bool success
2217 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2218 * @throws \ImagickException
2219 * @throws \Exception
2221 public static function sendContactUndo(string $target, int $cid, array $owner): bool
2223 $profile = APContact::getByURL($target);
2224 if (empty($profile['inbox'])) {
2225 Logger::warning('No inbox found for target', ['target' => $target, 'profile' => $profile]);
2229 $object_id = self::activityIDFromContact($cid);
2230 if (empty($object_id)) {
2234 $objectId = DI::baseUrl() . '/activity/' . System::createGUID();
2237 '@context' => ActivityPub::CONTEXT,
2240 'actor' => $owner['url'],
2244 'actor' => $owner['url'],
2245 'object' => $profile['url']
2247 'instrument' => self::getService(),
2248 'to' => [$profile['url']],
2251 Logger::info('Sending undo to ' . $target . ' for user ' . $owner['uid'] . ' with id ' . $objectId);
2253 $signed = LDSignature::sign($data, $owner);
2254 return HTTPSignature::transmit($signed, $profile['inbox'], $owner);
2258 * Prepends mentions (@) to $body variable
2260 * @param string $body HTML code
2262 * @param string $authorLink Author link
2263 * @return string HTML code with prepended mentions
2265 private static function prependMentions(string $body, int $uriid, string $authorLink): string
2269 foreach (Tag::getByURIId($uriid, [Tag::IMPLICIT_MENTION]) as $tag) {
2270 $profile = Contact::getByURL($tag['url'], false, ['addr', 'contact-type', 'nick']);
2271 if (!empty($profile['addr'])
2272 && $profile['contact-type'] != Contact::TYPE_COMMUNITY
2273 && !strstr($body, $profile['addr'])
2274 && !strstr($body, $tag['url'])
2275 && $tag['url'] !== $authorLink
2277 $mentions[] = '@[url=' . $tag['url'] . ']' . $profile['nick'] . '[/url]';
2281 $mentions[] = $body;
2283 return implode(' ', $mentions);