3 * @copyright Copyright (C) 2010-2021, 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\Feature;
25 use Friendica\Content\Text\BBCode;
26 use Friendica\Content\Text\Plaintext;
27 use Friendica\Core\Cache\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\Conversation;
36 use Friendica\Model\GServer;
37 use Friendica\Model\Item;
38 use Friendica\Model\ItemURI;
39 use Friendica\Model\Profile;
40 use Friendica\Model\Photo;
41 use Friendica\Model\Post;
42 use Friendica\Model\Tag;
43 use Friendica\Model\User;
44 use Friendica\Protocol\Activity;
45 use Friendica\Protocol\ActivityPub;
46 use Friendica\Protocol\Relay;
47 use Friendica\Util\DateTimeFormat;
48 use Friendica\Util\HTTPSignature;
49 use Friendica\Util\JsonLD;
50 use Friendica\Util\LDSignature;
51 use Friendica\Util\Map;
52 use Friendica\Util\Network;
53 use Friendica\Util\XML;
56 * ActivityPub Transmitter Protocol class
64 * Add relay servers to the list of inboxes
66 * @param array $inboxes
67 * @return array inboxes with added relay servers
69 public static function addRelayServerInboxes(array $inboxes = [])
71 $contacts = DBA::select('apcontact', ['inbox'],
72 ["`type` = ? AND `url` IN (SELECT `url` FROM `contact` WHERE `uid` = ? AND `rel` = ?)",
73 'Application', 0, Contact::FRIEND]);
74 while ($contact = DBA::fetch($contacts)) {
75 $inboxes[$contact['inbox']] = $contact['inbox'];
77 DBA::close($contacts);
83 * Add relay servers to the list of inboxes
85 * @param array $inboxes
86 * @return array inboxes with added relay servers
88 public static function addRelayServerInboxesForItem(int $item_id, array $inboxes = [])
90 $item = Post::selectFirst(['uid'], ['id' => $item_id]);
95 $relays = Relay::getList($item_id, [], [Protocol::ACTIVITYPUB]);
100 foreach ($relays as $relay) {
101 $contact = Contact::getByURLForUser($relay['url'], $item['uid'], false, ['id']);
102 $inboxes[$relay['batch']][] = $contact['id'] ?? 0;
108 * Subscribe to a relay
110 * @param string $url Subscribe actor url
111 * @return bool success
113 public static function sendRelayFollow(string $url)
115 $contact = Contact::getByURL($url);
116 if (empty($contact)) {
120 $activity_id = ActivityPub\Transmitter::activityIDFromContact($contact['id']);
121 $success = ActivityPub\Transmitter::sendActivity('Follow', $url, 0, $activity_id);
123 DBA::update('contact', ['rel' => Contact::FRIEND], ['id' => $contact['id']]);
130 * Unsubscribe from a relay
132 * @param string $url Subscribe actor url
133 * @param bool $force Set the relay status as non follower even if unsubscribe hadn't worked
134 * @return bool success
136 public static function sendRelayUndoFollow(string $url, bool $force = false)
138 $contact = Contact::getByURL($url);
139 if (empty($contact)) {
143 $success = self::sendContactUndo($url, $contact['id'], 0);
144 if ($success || $force) {
145 DBA::update('contact', ['rel' => Contact::NOTHING], ['id' => $contact['id']]);
152 * Collects a list of contacts of the given owner
154 * @param array $owner Owner array
155 * @param int|array $rel The relevant value(s) contact.rel should match
156 * @param string $module The name of the relevant AP endpoint module (followers|following)
157 * @param integer $page Page number
159 * @return array of owners
162 public static function getContacts($owner, $rel, $module, $page = null)
166 'uid' => $owner['uid'],
174 $condition = DBA::buildCondition($parameters);
176 $sql = "SELECT COUNT(*) as `count`
178 JOIN `apcontact` ON `apcontact`.`url` = `contact`.`url`
181 $contacts = DBA::fetchFirst($sql, ...$parameters);
183 $modulePath = '/' . $module . '/';
185 $data = ['@context' => ActivityPub::CONTEXT];
186 $data['id'] = DI::baseUrl() . $modulePath . $owner['nickname'];
187 $data['type'] = 'OrderedCollection';
188 $data['totalItems'] = $contacts['count'];
190 // When we hide our friends we will only show the pure number but don't allow more.
191 $profile = Profile::getByUID($owner['uid']);
192 if (!empty($profile['hide-friends'])) {
197 $data['first'] = DI::baseUrl() . $modulePath . $owner['nickname'] . '?page=1';
199 $data['type'] = 'OrderedCollectionPage';
202 $sql = "SELECT `contact`.`url`
204 JOIN `apcontact` ON `apcontact`.`url` = `contact`.`url`
208 $parameters[] = ($page - 1) * 100;
211 $contacts = DBA::p($sql, ...$parameters);
212 while ($contact = DBA::fetch($contacts)) {
213 $list[] = $contact['url'];
215 DBA::close($contacts);
218 $data['next'] = DI::baseUrl() . $modulePath . $owner['nickname'] . '?page=' . ($page + 1);
221 $data['partOf'] = DI::baseUrl() . $modulePath . $owner['nickname'];
223 $data['orderedItems'] = $list;
230 * Public posts for the given owner
232 * @param array $owner Owner array
233 * @param integer $page Page number
234 * @param string $requester URL of requesting account
236 * @return array of posts
237 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
238 * @throws \ImagickException
240 public static function getOutbox($owner, $page = null, $requester = '')
242 $public_contact = Contact::getIdForURL($owner['url']);
243 $condition = ['uid' => 0, 'contact-id' => $public_contact,
244 'private' => [Item::PUBLIC, Item::UNLISTED]];
246 if (!empty($requester)) {
247 $requester_id = Contact::getIdForURL($requester, $owner['uid']);
248 if (!empty($requester_id)) {
249 $permissionSets = DI::permissionSet()->selectByContactId($requester_id, $owner['uid']);
250 if (!empty($permissionSets)) {
251 $condition = ['uid' => $owner['uid'], 'origin' => true,
252 'psid' => array_merge($permissionSets->column('id'),
253 [DI::permissionSet()->getIdFromACL($owner['uid'], '', '', '', '')])];
258 $condition = array_merge($condition,
259 ['author-id' => $public_contact,
260 'gravity' => [GRAVITY_PARENT, GRAVITY_COMMENT],
261 'deleted' => false, 'visible' => true]);
263 $count = Post::count($condition);
265 $data = ['@context' => ActivityPub::CONTEXT];
266 $data['id'] = DI::baseUrl() . '/outbox/' . $owner['nickname'];
267 $data['type'] = 'OrderedCollection';
268 $data['totalItems'] = $count;
271 $data['first'] = DI::baseUrl() . '/outbox/' . $owner['nickname'] . '?page=1';
273 $data['type'] = 'OrderedCollectionPage';
276 $condition['parent-network'] = Protocol::NATIVE_SUPPORT;
278 $items = Post::select(['id'], $condition, ['limit' => [($page - 1) * 20, 20], 'order' => ['created' => true]]);
279 while ($item = Post::fetch($items)) {
280 $activity = self::createActivityFromItem($item['id'], true);
281 $activity['type'] = $activity['type'] == 'Update' ? 'Create' : $activity['type'];
283 // Only list "Create" activity objects here, no reshares
284 if (!empty($activity['object']) && ($activity['type'] == 'Create')) {
285 $list[] = $activity['object'];
291 $data['next'] = DI::baseUrl() . '/outbox/' . $owner['nickname'] . '?page=' . ($page + 1);
294 $data['partOf'] = DI::baseUrl() . '/outbox/' . $owner['nickname'];
296 $data['orderedItems'] = $list;
303 * Return the service array containing information the used software and it's url
305 * @return array with service data
307 private static function getService()
309 return ['type' => 'Service',
310 'name' => FRIENDICA_PLATFORM . " '" . FRIENDICA_CODENAME . "' " . FRIENDICA_VERSION . '-' . DB_UPDATE_VERSION,
311 'url' => DI::baseUrl()->get()];
315 * Return the ActivityPub profile of the given user
317 * @param integer $uid User ID
318 * @return array with profile data
319 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
321 public static function getProfile($uid)
324 $condition = ['uid' => $uid, 'blocked' => false, 'account_expired' => false,
325 'account_removed' => false, 'verified' => true];
326 $fields = ['guid', 'nickname', 'pubkey', 'account-type', 'page-flags'];
327 $user = DBA::selectFirst('user', $fields, $condition);
328 if (!DBA::isResult($user)) {
332 $fields = ['locality', 'region', 'country-name'];
333 $profile = DBA::selectFirst('profile', $fields, ['uid' => $uid]);
334 if (!DBA::isResult($profile)) {
338 $fields = ['name', 'url', 'location', 'about', 'avatar', 'photo'];
339 $contact = DBA::selectFirst('contact', $fields, ['uid' => $uid, 'self' => true]);
340 if (!DBA::isResult($contact)) {
344 $contact = User::getSystemAccount();
345 $user = ['guid' => '', 'nickname' => $contact['nick'], 'pubkey' => $contact['pubkey'],
346 'account-type' => $contact['contact-type'], 'page-flags' => User::PAGE_FLAGS_NORMAL];
347 $profile = ['locality' => '', 'region' => '', 'country-name' => ''];
350 $data = ['@context' => ActivityPub::CONTEXT];
351 $data['id'] = $contact['url'];
353 if (!empty($user['guid'])) {
354 $data['diaspora:guid'] = $user['guid'];
357 $data['type'] = ActivityPub::ACCOUNT_TYPES[$user['account-type']];
360 $data['following'] = DI::baseUrl() . '/following/' . $user['nickname'];
361 $data['followers'] = DI::baseUrl() . '/followers/' . $user['nickname'];
362 $data['inbox'] = DI::baseUrl() . '/inbox/' . $user['nickname'];
363 $data['outbox'] = DI::baseUrl() . '/outbox/' . $user['nickname'];
365 $data['inbox'] = DI::baseUrl() . '/friendica/inbox';
368 $data['preferredUsername'] = $user['nickname'];
369 $data['name'] = $contact['name'];
371 if (!empty($profile['country-name'] . $profile['region'] . $profile['locality'])) {
372 $data['vcard:hasAddress'] = ['@type' => 'vcard:Home', 'vcard:country-name' => $profile['country-name'],
373 'vcard:region' => $profile['region'], 'vcard:locality' => $profile['locality']];
376 if (!empty($contact['about'])) {
377 $data['summary'] = BBCode::convert($contact['about'], false);
380 $data['url'] = $contact['url'];
381 $data['manuallyApprovesFollowers'] = in_array($user['page-flags'], [User::PAGE_FLAGS_NORMAL, User::PAGE_FLAGS_PRVGROUP]);
382 $data['publicKey'] = ['id' => $contact['url'] . '#main-key',
383 'owner' => $contact['url'],
384 'publicKeyPem' => $user['pubkey']];
385 $data['endpoints'] = ['sharedInbox' => DI::baseUrl() . '/inbox'];
386 $data['icon'] = ['type' => 'Image',
387 'url' => $contact['photo']];
389 $data['generator'] = self::getService();
391 // tags: https://kitty.town/@inmysocks/100656097926961126.json
396 * @param string $username
398 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
400 public static function getDeletedUser($username)
403 '@context' => ActivityPub::CONTEXT,
404 'id' => DI::baseUrl() . '/profile/' . $username,
405 'type' => 'Tombstone',
406 'published' => DateTimeFormat::utcNow(DateTimeFormat::ATOM),
407 'updated' => DateTimeFormat::utcNow(DateTimeFormat::ATOM),
408 'deleted' => DateTimeFormat::utcNow(DateTimeFormat::ATOM),
413 * Returns an array with permissions of a given item array
417 * @return array with permissions
418 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
419 * @throws \ImagickException
421 private static function fetchPermissionBlockFromConversation($item)
423 if (empty($item['thr-parent'])) {
427 $condition = ['item-uri' => $item['thr-parent'], 'protocol' => Conversation::PARCEL_ACTIVITYPUB];
428 $conversation = DBA::selectFirst('conversation', ['source'], $condition);
429 if (!DBA::isResult($conversation)) {
433 $activity = json_decode($conversation['source'], true);
435 $actor = JsonLD::fetchElement($activity, 'actor', 'id');
436 if (!empty($actor)) {
437 $permissions['to'][] = $actor;
438 $profile = APContact::getByURL($actor);
443 $item_profile = APContact::getByURL($item['author-link']);
444 $exclude[] = $item['author-link'];
446 if ($item['gravity'] == GRAVITY_PARENT) {
447 $exclude[] = $item['owner-link'];
450 foreach (['to', 'cc', 'bto', 'bcc'] as $element) {
451 if (empty($activity[$element])) {
454 if (is_string($activity[$element])) {
455 $activity[$element] = [$activity[$element]];
458 foreach ($activity[$element] as $receiver) {
459 if (empty($receiver)) {
463 if (!empty($profile['followers']) && $receiver == $profile['followers'] && !empty($item_profile['followers'])) {
464 $permissions[$element][] = $item_profile['followers'];
465 } elseif (!in_array($receiver, $exclude)) {
466 $permissions[$element][] = $receiver;
474 * Check if the given item id is from ActivityPub
476 * @param integer $item_id
477 * @return boolean "true" if the post is from ActivityPub
479 private static function isAPPost(int $item_id)
481 if (empty($item_id)) {
485 return Post::exists(['id' => $item_id, 'network' => Protocol::ACTIVITYPUB]);
489 * Creates an array of permissions from an item thread
491 * @param array $item Item array
492 * @param boolean $blindcopy addressing via "bcc" or "cc"?
493 * @param integer $last_id Last item id for adding receivers
494 * @param boolean $forum_mode "true" means that we are sending content to a forum
496 * @return array with permission data
497 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
498 * @throws \ImagickException
500 private static function createPermissionBlockForItem($item, $blindcopy, $last_id = 0, $forum_mode = false)
503 $last_id = $item['id'];
508 // Check if we should always deliver our stuff via BCC
509 if (!empty($item['uid'])) {
510 $profile = User::getOwnerDataById($item['uid']);
511 if (!empty($profile)) {
512 $always_bcc = $profile['hide-friends'];
516 if (DI::config()->get('system', 'ap_always_bcc')) {
520 if (self::isAnnounce($item) || DI::config()->get('debug', 'total_ap_delivery') || self::isAPPost($last_id)) {
521 // Will be activated in a later step
522 $networks = Protocol::FEDERATED;
524 // For now only send to these contacts:
525 $networks = [Protocol::ACTIVITYPUB, Protocol::OSTATUS];
528 $data = ['to' => [], 'cc' => [], 'bcc' => []];
530 if ($item['gravity'] == GRAVITY_PARENT) {
531 $actor_profile = APContact::getByURL($item['owner-link']);
533 $actor_profile = APContact::getByURL($item['author-link']);
536 $terms = Tag::getByURIId($item['uri-id'], [Tag::MENTION, Tag::IMPLICIT_MENTION, Tag::EXCLUSIVE_MENTION]);
538 if ($item['private'] != Item::PRIVATE) {
539 // Directly mention the original author upon a quoted reshare.
540 // Else just ensure that the original author receives the reshare.
541 $announce = self::getAnnounceArray($item);
542 if (!empty($announce['comment'])) {
543 $data['to'][] = $announce['actor']['url'];
544 } elseif (!empty($announce)) {
545 $data['cc'][] = $announce['actor']['url'];
548 $data = array_merge($data, self::fetchPermissionBlockFromConversation($item));
550 // Check if the item is completely public or unlisted
551 if ($item['private'] == Item::PUBLIC) {
552 $data['to'][] = ActivityPub::PUBLIC_COLLECTION;
554 $data['cc'][] = ActivityPub::PUBLIC_COLLECTION;
557 foreach ($terms as $term) {
558 $profile = APContact::getByURL($term['url'], false);
559 if (!empty($profile)) {
560 $data['to'][] = $profile['url'];
564 $receiver_list = Item::enumeratePermissions($item, true);
566 foreach ($terms as $term) {
567 $cid = Contact::getIdForURL($term['url'], $item['uid']);
568 if (!empty($cid) && in_array($cid, $receiver_list)) {
569 $contact = DBA::selectFirst('contact', ['url', 'network', 'protocol', 'gsid'], ['id' => $cid, 'network' => Protocol::FEDERATED]);
570 if (!DBA::isResult($contact) || !self::isAPContact($contact, $networks)) {
574 if (!empty($profile = APContact::getByURL($contact['url'], false))) {
575 $data['to'][] = $profile['url'];
580 foreach ($receiver_list as $receiver) {
581 $contact = DBA::selectFirst('contact', ['url', 'hidden', 'network', 'protocol', 'gsid'], ['id' => $receiver, 'network' => Protocol::FEDERATED]);
582 if (!DBA::isResult($contact) || !self::isAPContact($contact, $networks)) {
586 if (!empty($profile = APContact::getByURL($contact['url'], false))) {
587 if ($contact['hidden'] || $always_bcc) {
588 $data['bcc'][] = $profile['url'];
590 $data['cc'][] = $profile['url'];
596 if (!empty($item['parent'])) {
597 $parents = Post::select(['id', 'author-link', 'owner-link', 'gravity', 'uri'], ['parent' => $item['parent']]);
598 while ($parent = Post::fetch($parents)) {
599 if ($parent['gravity'] == GRAVITY_PARENT) {
600 $profile = APContact::getByURL($parent['owner-link'], false);
601 if (!empty($profile)) {
602 if ($item['gravity'] != GRAVITY_PARENT) {
603 // Comments to forums are directed to the forum
604 // But comments to forums aren't directed to the followers collection
605 // This rule is only valid when the actor isn't the forum.
606 // The forum needs to transmit their content to their followers.
607 if (($profile['type'] == 'Group') && ($profile['url'] != $actor_profile['url'])) {
608 $data['to'][] = $profile['url'];
610 $data['cc'][] = $profile['url'];
611 if (($item['private'] != Item::PRIVATE) && !empty($actor_profile['followers'])) {
612 $data['cc'][] = $actor_profile['followers'];
616 // Public thread parent post always are directed to the followers
617 if (($item['private'] != Item::PRIVATE) && !$forum_mode) {
618 $data['cc'][] = $actor_profile['followers'];
624 // Don't include data from future posts
625 if ($parent['id'] >= $last_id) {
629 $profile = APContact::getByURL($parent['author-link'], false);
630 if (!empty($profile)) {
631 if (($profile['type'] == 'Group') || ($parent['uri'] == $item['thr-parent'])) {
632 $data['to'][] = $profile['url'];
634 $data['cc'][] = $profile['url'];
638 DBA::close($parents);
641 $data['to'] = array_unique($data['to']);
642 $data['cc'] = array_unique($data['cc']);
643 $data['bcc'] = array_unique($data['bcc']);
645 if (($key = array_search($item['author-link'], $data['to'])) !== false) {
646 unset($data['to'][$key]);
649 if (($key = array_search($item['author-link'], $data['cc'])) !== false) {
650 unset($data['cc'][$key]);
653 if (($key = array_search($item['author-link'], $data['bcc'])) !== false) {
654 unset($data['bcc'][$key]);
657 foreach ($data['to'] as $to) {
658 if (($key = array_search($to, $data['cc'])) !== false) {
659 unset($data['cc'][$key]);
662 if (($key = array_search($to, $data['bcc'])) !== false) {
663 unset($data['bcc'][$key]);
667 foreach ($data['cc'] as $cc) {
668 if (($key = array_search($cc, $data['bcc'])) !== false) {
669 unset($data['bcc'][$key]);
673 $receivers = ['to' => array_values($data['to']), 'cc' => array_values($data['cc']), 'bcc' => array_values($data['bcc'])];
676 unset($receivers['bcc']);
683 * Check if an inbox is archived
685 * @param string $url Inbox url
687 * @return boolean "true" if inbox is archived
689 public static function archivedInbox($url)
691 return DBA::exists('inbox-status', ['url' => $url, 'archive' => true]);
695 * Check if a given contact should be delivered via AP
697 * @param array $contact
698 * @param array $networks
702 private static function isAPContact(array $contact, array $networks)
704 if (in_array($contact['network'], $networks) || ($contact['protocol'] == Protocol::ACTIVITYPUB)) {
708 return GServer::getProtocol($contact['gsid'] ?? 0) == Post\DeliveryData::ACTIVITYPUB;
712 * Fetches a list of inboxes of followers of a given user
714 * @param integer $uid User ID
715 * @param boolean $personal fetch personal inboxes
716 * @param boolean $all_ap Retrieve all AP enabled inboxes
718 * @return array of follower inboxes
719 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
720 * @throws \ImagickException
722 public static function fetchTargetInboxesforUser($uid, $personal = false, bool $all_ap = false)
728 if (!empty($item['uid'])) {
729 $profile = User::getOwnerDataById($item['uid']);
730 if (!empty($profile)) {
731 $isforum = $profile['account-type'] == User::ACCOUNT_TYPE_COMMUNITY;
735 if (DI::config()->get('debug', 'total_ap_delivery') || $all_ap) {
736 // Will be activated in a later step
737 $networks = Protocol::FEDERATED;
739 // For now only send to these contacts:
740 $networks = [Protocol::ACTIVITYPUB, Protocol::OSTATUS];
743 $condition = ['uid' => $uid, 'archive' => false, 'pending' => false, 'blocked' => false, 'network' => Protocol::FEDERATED];
746 $condition['rel'] = [Contact::FOLLOWER, Contact::FRIEND];
749 $contacts = DBA::select('contact', ['id', 'url', 'network', 'protocol', 'gsid'], $condition);
750 while ($contact = DBA::fetch($contacts)) {
751 if (!self::isAPContact($contact, $networks)) {
755 if ($isforum && ($contact['network'] == Protocol::DFRN)) {
759 if (Network::isUrlBlocked($contact['url'])) {
763 $profile = APContact::getByURL($contact['url'], false);
764 if (!empty($profile)) {
765 if (empty($profile['sharedinbox']) || $personal || Contact::isLocal($contact['url'])) {
766 $target = $profile['inbox'];
768 $target = $profile['sharedinbox'];
770 if (!self::archivedInbox($target)) {
771 $inboxes[$target][] = $contact['id'];
775 DBA::close($contacts);
781 * Fetches an array of inboxes for the given item and user
783 * @param array $item Item array
784 * @param integer $uid User ID
785 * @param boolean $personal fetch personal inboxes
786 * @param integer $last_id Last item id for adding receivers
787 * @param boolean $forum_mode "true" means that we are sending content to a forum
788 * @return array with inboxes
789 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
790 * @throws \ImagickException
792 public static function fetchTargetInboxes($item, $uid, $personal = false, $last_id = 0, $forum_mode = false)
794 $permissions = self::createPermissionBlockForItem($item, true, $last_id, $forum_mode);
795 if (empty($permissions)) {
801 if ($item['gravity'] == GRAVITY_ACTIVITY) {
802 $item_profile = APContact::getByURL($item['author-link'], false);
804 $item_profile = APContact::getByURL($item['owner-link'], false);
807 if (empty($item_profile)) {
811 $profile_uid = User::getIdForURL($item_profile['url']);
813 foreach (['to', 'cc', 'bto', 'bcc'] as $element) {
814 if (empty($permissions[$element])) {
818 $blindcopy = in_array($element, ['bto', 'bcc']);
820 foreach ($permissions[$element] as $receiver) {
821 if (empty($receiver) || Network::isUrlBlocked($receiver)) {
825 if ($item_profile && ($receiver == $item_profile['followers']) && ($uid == $profile_uid)) {
826 $inboxes = array_merge($inboxes, self::fetchTargetInboxesforUser($uid, $personal, self::isAPPost($last_id)));
828 $profile = APContact::getByURL($receiver, false);
829 if (!empty($profile)) {
830 $contact = Contact::getByURLForUser($receiver, $uid, false, ['id']);
832 if (empty($profile['sharedinbox']) || $personal || $blindcopy || Contact::isLocal($receiver)) {
833 $target = $profile['inbox'];
835 $target = $profile['sharedinbox'];
837 if (!self::archivedInbox($target)) {
838 $inboxes[$target][] = $contact['id'] ?? 0;
849 * Creates an array in the structure of the item table for a given mail id
851 * @param integer $mail_id
856 public static function ItemArrayFromMail($mail_id, $use_title = false)
858 $mail = DBA::selectFirst('mail', [], ['id' => $mail_id]);
859 if (!DBA::isResult($mail)) {
863 $reply = DBA::selectFirst('mail', ['uri', 'uri-id', 'from-url'], ['parent-uri' => $mail['parent-uri'], 'reply' => false]);
865 // Making the post more compatible for Mastodon by:
866 // - Making it a note and not an article (no title)
867 // - Moving the title into the "summary" field that is used as a "content warning"
870 $mail['body'] = '[abstract]' . $mail['title'] . "[/abstract]\n" . $mail['body'];
874 $mail['author-link'] = $mail['owner-link'] = $mail['from-url'];
875 $mail['owner-id'] = $mail['author-id'];
876 $mail['allow_cid'] = '<'.$mail['contact-id'].'>';
877 $mail['allow_gid'] = '';
878 $mail['deny_cid'] = '';
879 $mail['deny_gid'] = '';
880 $mail['private'] = Item::PRIVATE;
881 $mail['deleted'] = false;
882 $mail['edited'] = $mail['created'];
883 $mail['plink'] = DI::baseUrl() . '/message/' . $mail['id'];
884 $mail['parent-uri'] = $reply['uri'];
885 $mail['parent-uri-id'] = $reply['uri-id'];
886 $mail['parent-author-id'] = Contact::getIdForURL($reply['from-url'], 0, false);
887 $mail['gravity'] = ($mail['reply'] ? GRAVITY_COMMENT: GRAVITY_PARENT);
888 $mail['event-type'] = '';
889 $mail['language'] = '';
896 * Creates an activity array for a given mail id
898 * @param integer $mail_id
899 * @param boolean $object_mode Is the activity item is used inside another object?
901 * @return array of activity
904 public static function createActivityFromMail($mail_id, $object_mode = false)
906 $mail = self::ItemArrayFromMail($mail_id);
910 $object = self::createNote($mail);
913 $data = ['@context' => ActivityPub::CONTEXT];
918 $data['id'] = $mail['uri'] . '/Create';
919 $data['type'] = 'Create';
920 $data['actor'] = $mail['author-link'];
921 $data['published'] = DateTimeFormat::utc($mail['created'] . '+00:00', DateTimeFormat::ATOM);
922 $data['instrument'] = self::getService();
923 $data = array_merge($data, self::createPermissionBlockForItem($mail, true));
925 if (empty($data['to']) && !empty($data['cc'])) {
926 $data['to'] = $data['cc'];
929 if (empty($data['to']) && !empty($data['bcc'])) {
930 $data['to'] = $data['bcc'];
936 $object['to'] = $data['to'];
937 $object['tag'] = [['type' => 'Mention', 'href' => $object['to'][0], 'name' => '']];
939 unset($object['cc']);
940 unset($object['bcc']);
942 $data['directMessage'] = true;
944 $data['object'] = $object;
946 $owner = User::getOwnerDataById($mail['uid']);
948 if (!$object_mode && !empty($owner)) {
949 return LDSignature::sign($data, $owner);
956 * Returns the activity type of a given item
960 * @return string with activity type
961 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
962 * @throws \ImagickException
964 private static function getTypeOfItem($item)
968 // Only check for a reshare, if it is a real reshare and no quoted reshare
969 if (strpos($item['body'], "[share") === 0) {
970 $announce = self::getAnnounceArray($item);
971 $reshared = !empty($announce);
976 } elseif ($item['verb'] == Activity::POST) {
977 if ($item['created'] == $item['edited']) {
982 } elseif ($item['verb'] == Activity::LIKE) {
984 } elseif ($item['verb'] == Activity::DISLIKE) {
986 } elseif ($item['verb'] == Activity::ATTEND) {
988 } elseif ($item['verb'] == Activity::ATTENDNO) {
990 } elseif ($item['verb'] == Activity::ATTENDMAYBE) {
991 $type = 'TentativeAccept';
992 } elseif ($item['verb'] == Activity::FOLLOW) {
994 } elseif ($item['verb'] == Activity::TAG) {
996 } elseif ($item['verb'] == Activity::ANNOUNCE) {
1006 * Creates the activity or fetches it from the cache
1008 * @param integer $item_id
1009 * @param boolean $force Force new cache entry
1011 * @return array with the activity
1012 * @throws \Exception
1014 public static function createCachedActivityFromItem($item_id, $force = false)
1016 $cachekey = 'APDelivery:createActivity:' . $item_id;
1019 $data = DI::cache()->get($cachekey);
1020 if (!is_null($data)) {
1025 $data = self::createActivityFromItem($item_id);
1027 DI::cache()->set($cachekey, $data, Duration::QUARTER_HOUR);
1032 * Creates an activity array for a given item id
1034 * @param integer $item_id
1035 * @param boolean $object_mode Is the activity item is used inside another object?
1037 * @return false|array
1038 * @throws \Exception
1040 public static function createActivityFromItem(int $item_id, bool $object_mode = false)
1042 Logger::info('Fetching activity', ['item' => $item_id]);
1043 $item = Post::selectFirst(Item::DELIVER_FIELDLIST, ['id' => $item_id, 'parent-network' => Protocol::NATIVE_SUPPORT]);
1044 if (!DBA::isResult($item)) {
1048 // In case of a forum post ensure to return the original post if author and forum are on the same machine
1049 if (($item['gravity'] == GRAVITY_PARENT) && !empty($item['forum_mode'])) {
1050 $author = Contact::getById($item['author-id'], ['nurl']);
1051 if (!empty($author['nurl'])) {
1052 $self = Contact::selectFirst(['uid'], ['nurl' => $author['nurl'], 'self' => true]);
1053 if (!empty($self['uid'])) {
1054 $forum_item = Post::selectFirst(Item::DELIVER_FIELDLIST, ['uri-id' => $item['uri-id'], 'uid' => $self['uid']]);
1055 if (DBA::isResult($forum_item)) {
1056 $item = $forum_item;
1062 if (empty($item['uri-id'])) {
1063 Logger::warning('Item without uri-id', ['item' => $item]);
1067 if (!$item['deleted']) {
1068 $condition = ['item-uri' => $item['uri'], 'protocol' => Conversation::PARCEL_ACTIVITYPUB];
1069 $conversation = DBA::selectFirst('conversation', ['source'], $condition);
1070 if (!$item['origin'] && DBA::isResult($conversation)) {
1071 $data = json_decode($conversation['source'], true);
1072 if (!empty($data['type'])) {
1073 if (in_array($data['type'], ['Create', 'Update'])) {
1075 unset($data['@context']);
1076 unset($data['signature']);
1078 Logger::info('Return stored conversation', ['item' => $item_id]);
1080 } elseif (in_array('as:' . $data['type'], Receiver::CONTENT_TYPES)) {
1081 if (!empty($data['@context'])) {
1082 $context = $data['@context'];
1083 unset($data['@context']);
1085 unset($data['actor']);
1092 $type = self::getTypeOfItem($item);
1094 if (!$object_mode) {
1095 $data = ['@context' => $context ?? ActivityPub::CONTEXT];
1097 if ($item['deleted'] && ($item['gravity'] == GRAVITY_ACTIVITY)) {
1099 } elseif ($item['deleted']) {
1106 if ($type == 'Delete') {
1107 $data['id'] = Item::newURI($item['uid'], $item['guid']) . '/' . $type;;
1108 } elseif (($item['gravity'] == GRAVITY_ACTIVITY) && ($type != 'Undo')) {
1109 $data['id'] = $item['uri'];
1111 $data['id'] = $item['uri'] . '/' . $type;
1114 $data['type'] = $type;
1116 if (($type != 'Announce') || ($item['gravity'] != GRAVITY_PARENT)) {
1117 $data['actor'] = $item['author-link'];
1119 $data['actor'] = $item['owner-link'];
1122 $data['published'] = DateTimeFormat::utc($item['created'] . '+00:00', DateTimeFormat::ATOM);
1124 $data['instrument'] = self::getService();
1126 $data = array_merge($data, self::createPermissionBlockForItem($item, false));
1128 if (in_array($data['type'], ['Create', 'Update', 'Delete'])) {
1129 $data['object'] = $object ?? self::createNote($item);
1130 } elseif ($data['type'] == 'Add') {
1131 $data = self::createAddTag($item, $data);
1132 } elseif ($data['type'] == 'Announce') {
1133 if ($item['verb'] == ACTIVITY::ANNOUNCE) {
1134 $data['object'] = $item['thr-parent'];
1136 $data = self::createAnnounce($item, $data);
1138 } elseif ($data['type'] == 'Follow') {
1139 $data['object'] = $item['parent-uri'];
1140 } elseif ($data['type'] == 'Undo') {
1141 $data['object'] = self::createActivityFromItem($item_id, true);
1143 $data['diaspora:guid'] = $item['guid'];
1144 if (!empty($item['signed_text'])) {
1145 $data['diaspora:like'] = $item['signed_text'];
1147 $data['object'] = $item['thr-parent'];
1150 if (!empty($item['contact-uid'])) {
1151 $uid = $item['contact-uid'];
1153 $uid = $item['uid'];
1156 $owner = User::getOwnerDataById($uid);
1158 Logger::info('Fetched activity', ['item' => $item_id, 'uid' => $uid]);
1160 // We don't sign if we aren't the actor. This is important for relaying content especially for forums
1161 if (!$object_mode && !empty($owner) && ($data['actor'] == $owner['url'])) {
1162 return LDSignature::sign($data, $owner);
1167 /// @todo Create "conversation" entry
1171 * Creates a location entry for a given item array
1173 * @param array $item
1175 * @return array with location array
1177 private static function createLocation($item)
1179 $location = ['type' => 'Place'];
1181 if (!empty($item['location'])) {
1182 $location['name'] = $item['location'];
1187 if (empty($item['coord'])) {
1188 $coord = Map::getCoordinates($item['location']);
1190 $coords = explode(' ', $item['coord']);
1191 if (count($coords) == 2) {
1192 $coord = ['lat' => $coords[0], 'lon' => $coords[1]];
1196 if (!empty($coord['lat']) && !empty($coord['lon'])) {
1197 $location['latitude'] = $coord['lat'];
1198 $location['longitude'] = $coord['lon'];
1205 * Returns a tag array for a given item array
1207 * @param array $item
1209 * @return array of tags
1210 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1212 private static function createTagList($item)
1216 $terms = Tag::getByURIId($item['uri-id'], [Tag::HASHTAG, Tag::MENTION, Tag::IMPLICIT_MENTION, Tag::EXCLUSIVE_MENTION]);
1217 foreach ($terms as $term) {
1218 if ($term['type'] == Tag::HASHTAG) {
1219 $url = DI::baseUrl() . '/search?tag=' . urlencode($term['name']);
1220 $tags[] = ['type' => 'Hashtag', 'href' => $url, 'name' => '#' . $term['name']];
1222 $contact = Contact::getByURL($term['url'], false, ['addr']);
1223 if (empty($contact)) {
1226 if (!empty($contact['addr'])) {
1227 $mention = '@' . $contact['addr'];
1229 $mention = '@' . $term['url'];
1232 $tags[] = ['type' => 'Mention', 'href' => $term['url'], 'name' => $mention];
1236 $announce = self::getAnnounceArray($item);
1237 // Mention the original author upon commented reshares
1238 if (!empty($announce['comment'])) {
1239 $tags[] = ['type' => 'Mention', 'href' => $announce['actor']['url'], 'name' => '@' . $announce['actor']['addr']];
1246 * Adds attachment data to the JSON document
1248 * @param array $item Data of the item that is to be posted
1249 * @param string $type Object type
1251 * @return array with attachment data
1252 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1254 private static function createAttachmentList($item, $type)
1258 $uriids = [$item['uri-id']];
1259 $shared = BBCode::fetchShareAttributes($item['body']);
1260 if (!empty($shared['guid'])) {
1261 $shared_item = Post::selectFirst(['uri-id'], ['guid' => $shared['guid']]);
1262 if (!empty($shared_item['uri-id'])) {
1263 $uriids[] = $shared_item['uri-id'];
1268 foreach ($uriids as $uriid) {
1269 foreach (Post\Media::getByURIId($uriid, [Post\Media::DOCUMENT, Post\Media::TORRENT]) as $attachment) {
1270 if (in_array($attachment['url'], $urls)) {
1273 $urls[] = $attachment['url'];
1275 $attachments[] = ['type' => 'Document',
1276 'mediaType' => $attachment['mimetype'],
1277 'url' => $attachment['url'],
1278 'name' => $attachment['description']];
1282 if ($type != 'Note') {
1283 return $attachments;
1286 foreach ($uriids as $uriid) {
1287 foreach (Post\Media::getByURIId($uriid, [Post\Media::AUDIO, Post\Media::IMAGE, Post\Media::VIDEO]) as $attachment) {
1288 if (in_array($attachment['url'], $urls)) {
1291 $urls[] = $attachment['url'];
1293 $attachments[] = ['type' => 'Document',
1294 'mediaType' => $attachment['mimetype'],
1295 'url' => $attachment['url'],
1296 'name' => $attachment['description']];
1298 // Currently deactivated, since it creates side effects on Mastodon and Pleroma.
1299 // It will be activated, once this cleared.
1301 foreach (Post\Media::getByURIId($uriid, [Post\Media::HTML]) as $attachment) {
1302 if (in_array($attachment['url'], $urls)) {
1305 $urls[] = $attachment['url'];
1307 $attachments[] = ['type' => 'Page',
1308 'mediaType' => $attachment['mimetype'],
1309 'url' => $attachment['url'],
1310 'name' => $attachment['description']];
1314 return $attachments;
1318 * Callback function to replace a Friendica style mention in a mention that is used on AP
1320 * @param array $match Matching values for the callback
1321 * @return string Replaced mention
1322 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1324 private static function mentionCallback($match)
1326 if (empty($match[1])) {
1330 $data = Contact::getByURL($match[1], false, ['url', 'alias', 'nick']);
1331 if (empty($data['nick'])) {
1335 return '[url=' . $data['url'] . ']@' . $data['nick'] . '[/url]';
1339 * Callback function to replace a Friendica style mention in a mention for a summary
1341 * @param array $match Matching values for the callback
1342 * @return string Replaced mention
1343 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1345 private static function mentionAddrCallback($match)
1347 if (empty($match[1])) {
1351 $data = Contact::getByURL($match[1], false, ['addr']);
1352 if (empty($data['addr'])) {
1356 return '@' . $data['addr'];
1360 * Remove image elements since they are added as attachment
1362 * @param string $body
1364 * @return string with removed images
1366 private static function removePictures($body)
1368 // Simplify image codes
1369 $body = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $body);
1370 $body = preg_replace("/\[img\=(.*?)\](.*?)\[\/img\]/ism", '[img]$1[/img]', $body);
1372 // Now remove local links
1373 $body = preg_replace_callback(
1374 '/\[url=([^\[\]]*)\]\[img\](.*)\[\/img\]\[\/url\]/Usi',
1376 // We remove the link when it is a link to a local photo page
1377 if (Photo::isLocalPage($match[1])) {
1380 // otherwise we just return the link
1381 return '[url]' . $match[1] . '[/url]';
1386 // Remove all pictures
1387 $body = preg_replace("/\[img\]([^\[\]]*)\[\/img\]/Usi", '', $body);
1393 * Fetches the "context" value for a givem item array from the "conversation" table
1395 * @param array $item
1397 * @return string with context url
1398 * @throws \Exception
1400 private static function fetchContextURLForItem($item)
1402 $conversation = DBA::selectFirst('conversation', ['conversation-href', 'conversation-uri'], ['item-uri' => $item['parent-uri']]);
1403 if (DBA::isResult($conversation) && !empty($conversation['conversation-href'])) {
1404 $context_uri = $conversation['conversation-href'];
1405 } elseif (DBA::isResult($conversation) && !empty($conversation['conversation-uri'])) {
1406 $context_uri = $conversation['conversation-uri'];
1408 $context_uri = $item['parent-uri'] . '#context';
1410 return $context_uri;
1414 * Returns if the post contains sensitive content ("nsfw")
1416 * @param integer $uri_id
1419 * @throws \Exception
1421 private static function isSensitive($uri_id)
1423 return DBA::exists('tag-view', ['uri-id' => $uri_id, 'name' => 'nsfw']);
1427 * Creates event data
1429 * @param array $item
1431 * @return array with the event data
1432 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1434 private static function createEvent($item)
1437 $event['name'] = $item['event-summary'];
1438 $event['content'] = BBCode::convert($item['event-desc'], false, BBCode::ACTIVITYPUB);
1439 $event['startTime'] = DateTimeFormat::utc($item['event-start'] . '+00:00', DateTimeFormat::ATOM);
1441 if (!$item['event-nofinish']) {
1442 $event['endTime'] = DateTimeFormat::utc($item['event-finish'] . '+00:00', DateTimeFormat::ATOM);
1445 if (!empty($item['event-location'])) {
1446 $item['location'] = $item['event-location'];
1447 $event['location'] = self::createLocation($item);
1450 $event['dfrn:adjust'] = (bool)$item['event-adjust'];
1456 * Creates a note/article object array
1458 * @param array $item
1460 * @return array with the object data
1461 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1462 * @throws \ImagickException
1464 public static function createNote($item)
1470 if ($item['event-type'] == 'event') {
1472 } elseif (!empty($item['title'])) {
1478 if ($item['deleted']) {
1479 $type = 'Tombstone';
1483 $data['id'] = $item['uri'];
1484 $data['type'] = $type;
1486 if ($item['deleted']) {
1490 $data['summary'] = BBCode::toPlaintext(BBCode::getAbstract($item['body'], Protocol::ACTIVITYPUB));
1492 if ($item['uri'] != $item['thr-parent']) {
1493 $data['inReplyTo'] = $item['thr-parent'];
1495 $data['inReplyTo'] = null;
1498 $data['diaspora:guid'] = $item['guid'];
1499 $data['published'] = DateTimeFormat::utc($item['created'] . '+00:00', DateTimeFormat::ATOM);
1501 if ($item['created'] != $item['edited']) {
1502 $data['updated'] = DateTimeFormat::utc($item['edited'] . '+00:00', DateTimeFormat::ATOM);
1505 $data['url'] = $item['plink'];
1506 $data['attributedTo'] = $item['author-link'];
1507 $data['sensitive'] = self::isSensitive($item['uri-id']);
1508 $data['context'] = self::fetchContextURLForItem($item);
1510 if (!empty($item['title'])) {
1511 $data['name'] = BBCode::toPlaintext($item['title'], false);
1514 $permission_block = self::createPermissionBlockForItem($item, false);
1516 $body = $item['body'];
1518 if ($type == 'Note') {
1519 $body = $item['raw-body'] ?? self::removePictures($body);
1523 * @todo Improve the automated summary
1524 * This part is currently deactivated. The automated summary seems to be more
1525 * confusing than helping. But possibly we will find a better way.
1526 * So the code is left here for now as a reminder
1528 * } elseif (($type == 'Article') && empty($data['summary'])) {
1529 * $regexp = "/[@!]\[url\=([^\[\]]*)\].*?\[\/url\]/ism";
1530 * $summary = preg_replace_callback($regexp, ['self', 'mentionAddrCallback'], $body);
1531 * $data['summary'] = BBCode::toPlaintext(Plaintext::shorten(self::removePictures($summary), 1000));
1535 if (empty($item['uid']) || !Feature::isEnabled($item['uid'], 'explicit_mentions')) {
1536 $body = self::prependMentions($body, $item['uri-id'], $item['author-link']);
1539 if ($type == 'Event') {
1540 $data = array_merge($data, self::createEvent($item));
1542 $regexp = "/[@!]\[url\=([^\[\]]*)\].*?\[\/url\]/ism";
1543 $body = preg_replace_callback($regexp, ['self', 'mentionCallback'], $body);
1545 $data['content'] = BBCode::convert($body, false, BBCode::ACTIVITYPUB);
1548 // The regular "content" field does contain a minimized HTML. This is done since systems like
1549 // Mastodon has got problems with - for example - embedded pictures.
1550 // The contentMap does contain the unmodified HTML.
1551 $language = self::getLanguage($item);
1552 if (!empty($language)) {
1553 $regexp = "/[@!]\[url\=([^\[\]]*)\].*?\[\/url\]/ism";
1554 $richbody = preg_replace_callback($regexp, ['self', 'mentionCallback'], $item['body']);
1555 $richbody = BBCode::removeAttachment($richbody);
1557 $data['contentMap'][$language] = BBCode::convert($richbody, false, BBCode::EXTERNAL);
1560 $data['source'] = ['content' => $item['body'], 'mediaType' => "text/bbcode"];
1562 if (!empty($item['signed_text']) && ($item['uri'] != $item['thr-parent'])) {
1563 $data['diaspora:comment'] = $item['signed_text'];
1566 $data['attachment'] = self::createAttachmentList($item, $type);
1567 $data['tag'] = self::createTagList($item);
1569 if (empty($data['location']) && (!empty($item['coord']) || !empty($item['location']))) {
1570 $data['location'] = self::createLocation($item);
1573 if (!empty($item['app'])) {
1574 $data['generator'] = ['type' => 'Application', 'name' => $item['app']];
1577 $data = array_merge($data, $permission_block);
1583 * Fetches the language from the post, the user or the system.
1585 * @param array $item
1587 * @return string language string
1589 private static function getLanguage(array $item)
1591 // Try to fetch the language from the post itself
1592 if (!empty($item['language'])) {
1593 $languages = array_keys(json_decode($item['language'], true));
1594 if (!empty($languages[0])) {
1595 return $languages[0];
1599 // Otherwise use the user's language
1600 if (!empty($item['uid'])) {
1601 $user = DBA::selectFirst('user', ['language'], ['uid' => $item['uid']]);
1602 if (!empty($user['language'])) {
1603 return $user['language'];
1607 // And finally just use the system language
1608 return DI::config()->get('system', 'language');
1612 * Creates an an "add tag" entry
1614 * @param array $item
1615 * @param array $data activity data
1617 * @return array with activity data for adding tags
1618 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1619 * @throws \ImagickException
1621 private static function createAddTag($item, $data)
1623 $object = XML::parseString($item['object']);
1624 $target = XML::parseString($item["target"]);
1626 $data['diaspora:guid'] = $item['guid'];
1627 $data['actor'] = $item['author-link'];
1628 $data['target'] = (string)$target->id;
1629 $data['summary'] = BBCode::toPlaintext($item['body']);
1630 $data['object'] = ['id' => (string)$object->id, 'type' => 'tag', 'name' => (string)$object->title, 'content' => (string)$object->content];
1636 * Creates an announce object entry
1638 * @param array $item
1639 * @param array $data activity data
1641 * @return array with activity data
1642 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1643 * @throws \ImagickException
1645 private static function createAnnounce($item, $data)
1647 $orig_body = $item['body'];
1648 $announce = self::getAnnounceArray($item);
1649 if (empty($announce)) {
1650 $data['type'] = 'Create';
1651 $data['object'] = self::createNote($item);
1655 if (empty($announce['comment'])) {
1656 // Pure announce, without a quote
1657 $data['type'] = 'Announce';
1658 $data['object'] = $announce['object']['uri'];
1663 $data['type'] = 'Create';
1664 $item['body'] = $announce['comment'] . "\n" . $announce['object']['plink'];
1665 $data['object'] = self::createNote($item);
1667 /// @todo Finally descide how to implement this in AP. This is a possible way:
1668 $data['object']['attachment'][] = self::createNote($announce['object']);
1670 $data['object']['source']['content'] = $orig_body;
1675 * Return announce related data if the item is an annunce
1677 * @param array $item
1681 public static function getAnnounceArray($item)
1683 $reshared = Item::getShareArray($item);
1684 if (empty($reshared['guid'])) {
1688 $reshared_item = Post::selectFirst(Item::DELIVER_FIELDLIST, ['guid' => $reshared['guid']]);
1689 if (!DBA::isResult($reshared_item)) {
1693 if (!in_array($reshared_item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
1697 $profile = APContact::getByURL($reshared_item['author-link'], false);
1698 if (empty($profile)) {
1702 return ['object' => $reshared_item, 'actor' => $profile, 'comment' => $reshared['comment']];
1706 * Checks if the provided item array is an announce
1708 * @param array $item
1712 public static function isAnnounce($item)
1714 if (!empty($item['verb']) && ($item['verb'] == Activity::ANNOUNCE)) {
1718 $announce = self::getAnnounceArray($item);
1719 if (empty($announce)) {
1723 return empty($announce['comment']);
1727 * Creates an activity id for a given contact id
1729 * @param integer $cid Contact ID of target
1731 * @return bool|string activity id
1733 public static function activityIDFromContact($cid)
1735 $contact = DBA::selectFirst('contact', ['uid', 'id', 'created'], ['id' => $cid]);
1736 if (!DBA::isResult($contact)) {
1740 $hash = hash('ripemd128', $contact['uid'].'-'.$contact['id'].'-'.$contact['created']);
1741 $uuid = substr($hash, 0, 8). '-' . substr($hash, 8, 4) . '-' . substr($hash, 12, 4) . '-' . substr($hash, 16, 4) . '-' . substr($hash, 20, 12);
1742 return DI::baseUrl() . '/activity/' . $uuid;
1746 * Transmits a contact suggestion to a given inbox
1748 * @param integer $uid User ID
1749 * @param string $inbox Target inbox
1750 * @param integer $suggestion_id Suggestion ID
1752 * @return boolean was the transmission successful?
1753 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1755 public static function sendContactSuggestion($uid, $inbox, $suggestion_id)
1757 $owner = User::getOwnerDataById($uid);
1759 $suggestion = DI::fsuggest()->getById($suggestion_id);
1761 $data = ['@context' => ActivityPub::CONTEXT,
1762 'id' => DI::baseUrl() . '/activity/' . System::createGUID(),
1763 'type' => 'Announce',
1764 'actor' => $owner['url'],
1765 'object' => $suggestion->url,
1766 'content' => $suggestion->note,
1767 'instrument' => self::getService(),
1768 'to' => [ActivityPub::PUBLIC_COLLECTION],
1771 $signed = LDSignature::sign($data, $owner);
1773 Logger::log('Deliver profile deletion for user ' . $uid . ' to ' . $inbox . ' via ActivityPub', Logger::DEBUG);
1774 return HTTPSignature::transmit($signed, $inbox, $uid);
1778 * Transmits a profile relocation to a given inbox
1780 * @param integer $uid User ID
1781 * @param string $inbox Target inbox
1783 * @return boolean was the transmission successful?
1784 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1786 public static function sendProfileRelocation($uid, $inbox)
1788 $owner = User::getOwnerDataById($uid);
1790 $data = ['@context' => ActivityPub::CONTEXT,
1791 'id' => DI::baseUrl() . '/activity/' . System::createGUID(),
1792 'type' => 'dfrn:relocate',
1793 'actor' => $owner['url'],
1794 'object' => $owner['url'],
1795 'published' => DateTimeFormat::utcNow(DateTimeFormat::ATOM),
1796 'instrument' => self::getService(),
1797 'to' => [ActivityPub::PUBLIC_COLLECTION],
1800 $signed = LDSignature::sign($data, $owner);
1802 Logger::log('Deliver profile relocation for user ' . $uid . ' to ' . $inbox . ' via ActivityPub', Logger::DEBUG);
1803 return HTTPSignature::transmit($signed, $inbox, $uid);
1807 * Transmits a profile deletion to a given inbox
1809 * @param integer $uid User ID
1810 * @param string $inbox Target inbox
1812 * @return boolean was the transmission successful?
1813 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1815 public static function sendProfileDeletion($uid, $inbox)
1817 $owner = User::getOwnerDataById($uid);
1819 if (empty($owner)) {
1820 Logger::error('No owner data found, the deletion message cannot be processed.', ['user' => $uid]);
1824 if (empty($owner['uprvkey'])) {
1825 Logger::error('No private key for owner found, the deletion message cannot be processed.', ['user' => $uid]);
1829 $data = ['@context' => ActivityPub::CONTEXT,
1830 'id' => DI::baseUrl() . '/activity/' . System::createGUID(),
1832 'actor' => $owner['url'],
1833 'object' => $owner['url'],
1834 'published' => DateTimeFormat::utcNow(DateTimeFormat::ATOM),
1835 'instrument' => self::getService(),
1836 'to' => [ActivityPub::PUBLIC_COLLECTION],
1839 $signed = LDSignature::sign($data, $owner);
1841 Logger::log('Deliver profile deletion for user ' . $uid . ' to ' . $inbox . ' via ActivityPub', Logger::DEBUG);
1842 return HTTPSignature::transmit($signed, $inbox, $uid);
1846 * Transmits a profile change to a given inbox
1848 * @param integer $uid User ID
1849 * @param string $inbox Target inbox
1851 * @return boolean was the transmission successful?
1852 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1853 * @throws \ImagickException
1855 public static function sendProfileUpdate($uid, $inbox)
1857 $owner = User::getOwnerDataById($uid);
1858 $profile = APContact::getByURL($owner['url']);
1860 $data = ['@context' => ActivityPub::CONTEXT,
1861 'id' => DI::baseUrl() . '/activity/' . System::createGUID(),
1863 'actor' => $owner['url'],
1864 'object' => self::getProfile($uid),
1865 'published' => DateTimeFormat::utcNow(DateTimeFormat::ATOM),
1866 'instrument' => self::getService(),
1867 'to' => [$profile['followers']],
1870 $signed = LDSignature::sign($data, $owner);
1872 Logger::log('Deliver profile update for user ' . $uid . ' to ' . $inbox . ' via ActivityPub', Logger::DEBUG);
1873 return HTTPSignature::transmit($signed, $inbox, $uid);
1877 * Transmits a given activity to a target
1879 * @param string $activity Type name
1880 * @param string $target Target profile
1881 * @param integer $uid User ID
1883 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1884 * @throws \ImagickException
1885 * @throws \Exception
1887 public static function sendActivity($activity, $target, $uid, $id = '')
1889 $profile = APContact::getByURL($target);
1890 if (empty($profile['inbox'])) {
1891 Logger::warning('No inbox found for target', ['target' => $target, 'profile' => $profile]);
1895 $owner = User::getOwnerDataById($uid);
1898 $id = DI::baseUrl() . '/activity/' . System::createGUID();
1901 $data = ['@context' => ActivityPub::CONTEXT,
1903 'type' => $activity,
1904 'actor' => $owner['url'],
1905 'object' => $profile['url'],
1906 'instrument' => self::getService(),
1907 'to' => [$profile['url']]];
1909 Logger::log('Sending activity ' . $activity . ' to ' . $target . ' for user ' . $uid, Logger::DEBUG);
1911 $signed = LDSignature::sign($data, $owner);
1912 return HTTPSignature::transmit($signed, $profile['inbox'], $uid);
1916 * Transmits a "follow object" activity to a target
1917 * This is a preparation for sending automated "follow" requests when receiving "Announce" messages
1919 * @param string $object Object URL
1920 * @param string $target Target profile
1921 * @param integer $uid User ID
1923 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1924 * @throws \ImagickException
1925 * @throws \Exception
1927 public static function sendFollowObject($object, $target, $uid = 0)
1929 $profile = APContact::getByURL($target);
1930 if (empty($profile['inbox'])) {
1931 Logger::warning('No inbox found for target', ['target' => $target, 'profile' => $profile]);
1936 // Fetch the list of administrators
1937 $admin_mail = explode(',', str_replace(' ', '', DI::config()->get('config', 'admin_email')));
1939 // We need to use some user as a sender. It doesn't care who it will send. We will use an administrator account.
1940 $condition = ['verified' => true, 'blocked' => false, 'account_removed' => false, 'account_expired' => false, 'email' => $admin_mail];
1941 $first_user = DBA::selectFirst('user', ['uid'], $condition);
1942 $uid = $first_user['uid'];
1945 $condition = ['verb' => Activity::FOLLOW, 'uid' => 0, 'parent-uri' => $object,
1946 'author-id' => Contact::getPublicIdByUserId($uid)];
1947 if (Post::exists($condition)) {
1948 Logger::log('Follow for ' . $object . ' for user ' . $uid . ' does already exist.', Logger::DEBUG);
1952 $owner = User::getOwnerDataById($uid);
1954 $data = ['@context' => ActivityPub::CONTEXT,
1955 'id' => DI::baseUrl() . '/activity/' . System::createGUID(),
1957 'actor' => $owner['url'],
1958 'object' => $object,
1959 'instrument' => self::getService(),
1960 'to' => [$profile['url']]];
1962 Logger::log('Sending follow ' . $object . ' to ' . $target . ' for user ' . $uid, Logger::DEBUG);
1964 $signed = LDSignature::sign($data, $owner);
1965 return HTTPSignature::transmit($signed, $profile['inbox'], $uid);
1969 * Transmit a message that the contact request had been accepted
1971 * @param string $target Target profile
1973 * @param integer $uid User ID
1974 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1975 * @throws \ImagickException
1977 public static function sendContactAccept($target, $id, $uid)
1979 $profile = APContact::getByURL($target);
1980 if (empty($profile['inbox'])) {
1981 Logger::warning('No inbox found for target', ['target' => $target, 'profile' => $profile]);
1985 $owner = User::getOwnerDataById($uid);
1986 $data = ['@context' => ActivityPub::CONTEXT,
1987 'id' => DI::baseUrl() . '/activity/' . System::createGUID(),
1989 'actor' => $owner['url'],
1991 'id' => (string)$id,
1993 'actor' => $profile['url'],
1994 'object' => $owner['url']
1996 'instrument' => self::getService(),
1997 'to' => [$profile['url']]];
1999 Logger::debug('Sending accept to ' . $target . ' for user ' . $uid . ' with id ' . $id);
2001 $signed = LDSignature::sign($data, $owner);
2002 HTTPSignature::transmit($signed, $profile['inbox'], $uid);
2006 * Reject a contact request or terminates the contact relation
2008 * @param string $target Target profile
2010 * @param integer $uid User ID
2011 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2012 * @throws \ImagickException
2014 public static function sendContactReject($target, $id, $uid)
2016 $profile = APContact::getByURL($target);
2017 if (empty($profile['inbox'])) {
2018 Logger::warning('No inbox found for target', ['target' => $target, 'profile' => $profile]);
2022 $owner = User::getOwnerDataById($uid);
2023 $data = ['@context' => ActivityPub::CONTEXT,
2024 'id' => DI::baseUrl() . '/activity/' . System::createGUID(),
2026 'actor' => $owner['url'],
2028 'id' => (string)$id,
2030 'actor' => $profile['url'],
2031 'object' => $owner['url']
2033 'instrument' => self::getService(),
2034 'to' => [$profile['url']]];
2036 Logger::debug('Sending reject to ' . $target . ' for user ' . $uid . ' with id ' . $id);
2038 $signed = LDSignature::sign($data, $owner);
2039 HTTPSignature::transmit($signed, $profile['inbox'], $uid);
2043 * Transmits a message that we don't want to follow this contact anymore
2045 * @param string $target Target profile
2046 * @param integer $uid User ID
2047 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2048 * @throws \ImagickException
2049 * @throws \Exception
2050 * @return bool success
2052 public static function sendContactUndo($target, $cid, $uid)
2054 $profile = APContact::getByURL($target);
2055 if (empty($profile['inbox'])) {
2056 Logger::warning('No inbox found for target', ['target' => $target, 'profile' => $profile]);
2060 $object_id = self::activityIDFromContact($cid);
2061 if (empty($object_id)) {
2065 $id = DI::baseUrl() . '/activity/' . System::createGUID();
2067 $owner = User::getOwnerDataById($uid);
2068 $data = ['@context' => ActivityPub::CONTEXT,
2071 'actor' => $owner['url'],
2072 'object' => ['id' => $object_id, 'type' => 'Follow',
2073 'actor' => $owner['url'],
2074 'object' => $profile['url']],
2075 'instrument' => self::getService(),
2076 'to' => [$profile['url']]];
2078 Logger::log('Sending undo to ' . $target . ' for user ' . $uid . ' with id ' . $id, Logger::DEBUG);
2080 $signed = LDSignature::sign($data, $owner);
2081 return HTTPSignature::transmit($signed, $profile['inbox'], $uid);
2084 private static function prependMentions($body, int $uriid, string $authorLink)
2088 foreach (Tag::getByURIId($uriid, [Tag::IMPLICIT_MENTION]) as $tag) {
2089 $profile = Contact::getByURL($tag['url'], false, ['addr', 'contact-type', 'nick']);
2090 if (!empty($profile['addr'])
2091 && $profile['contact-type'] != Contact::TYPE_COMMUNITY
2092 && !strstr($body, $profile['addr'])
2093 && !strstr($body, $tag['url'])
2094 && $tag['url'] !== $authorLink
2096 $mentions[] = '@[url=' . $tag['url'] . ']' . $profile['nick'] . '[/url]';
2100 $mentions[] = $body;
2102 return implode(' ', $mentions);