- self::processActivity($activity, '', $uid, true);
- }
- }
-
- /**
- * @brief
- *
- * @param array $activity
- * @param $uid
- * @param $trust_source
- *
- * @return
- */
- private static function prepareObjectData($activity, $uid, &$trust_source)
- {
- $actor = JsonLD::fetchElement($activity, 'actor', 'id');
- if (empty($actor)) {
- logger('Empty actor', LOGGER_DEBUG);
- return [];
- }
-
- // Fetch all receivers from to, cc, bto and bcc
- $receivers = self::getReceivers($activity, $actor);
-
- // When it is a delivery to a personal inbox we add that user to the receivers
- if (!empty($uid)) {
- $owner = User::getOwnerDataById($uid);
- $additional = ['uid:' . $uid => $uid];
- $receivers = array_merge($receivers, $additional);
- }
-
- logger('Receivers: ' . json_encode($receivers), LOGGER_DEBUG);
-
- $object_id = JsonLD::fetchElement($activity, 'object', 'id');
- if (empty($object_id)) {
- logger('No object found', LOGGER_DEBUG);
- return [];
- }
-
- // Fetch the content only on activities where this matters
- if (in_array($activity['type'], ['Create', 'Announce'])) {
- $object_data = self::fetchObject($object_id, $activity['object'], $trust_source);
- if (empty($object_data)) {
- logger("Object data couldn't be processed", LOGGER_DEBUG);
- return [];
- }
- // We had been able to retrieve the object data - so we can trust the source
- $trust_source = true;
- } elseif (in_array($activity['type'], ['Like', 'Dislike'])) {
- // Create a mostly empty array out of the activity data (instead of the object).
- // This way we later don't have to check for the existence of ech individual array element.
- $object_data = self::ProcessObject($activity);
- $object_data['name'] = $activity['type'];
- $object_data['author'] = $activity['actor'];
- $object_data['object'] = $object_id;
- $object_data['object_type'] = ''; // Since we don't fetch the object, we don't know the type
- } else {
- $object_data = [];
- $object_data['id'] = $activity['id'];
- $object_data['object'] = $activity['object'];
- $object_data['object_type'] = JsonLD::fetchElement($activity, 'object', 'type');
- }
-
- $object_data = self::addActivityFields($object_data, $activity);
-
- $object_data['type'] = $activity['type'];
- $object_data['owner'] = $actor;
- $object_data['receiver'] = array_merge(defaults($object_data, 'receiver', []), $receivers);
-
- logger('Processing ' . $object_data['type'] . ' ' . $object_data['object_type'] . ' ' . $object_data['id'], LOGGER_DEBUG);
-
- return $object_data;
- }
-
- /**
- * @brief
- *
- * @param array $activity
- * @param $body
- * @param $uid
- * @param $trust_source
- */
- private static function processActivity($activity, $body = '', $uid = null, $trust_source = false)
- {
- if (empty($activity['type'])) {
- logger('Empty type', LOGGER_DEBUG);
- return;
- }
-
- if (empty($activity['object'])) {
- logger('Empty object', LOGGER_DEBUG);
- return;
- }
-
- if (empty($activity['actor'])) {
- logger('Empty actor', LOGGER_DEBUG);
- return;
-
- }
-
- // $trust_source is called by reference and is set to true if the content was retrieved successfully
- $object_data = self::prepareObjectData($activity, $uid, $trust_source);
- if (empty($object_data)) {
- logger('No object data found', LOGGER_DEBUG);
- return;
- }
-
- if (!$trust_source) {
- logger('No trust for activity type "' . $activity['type'] . '", so we quit now.', LOGGER_DEBUG);
- }
-
- switch ($activity['type']) {
- case 'Create':
- case 'Announce':
- self::createItem($object_data, $body);
- break;
-
- case 'Like':
- self::likeItem($object_data, $body);
- break;
-
- case 'Dislike':
- self::dislikeItem($object_data, $body);
- break;
-
- case 'Update':
- if (in_array($object_data['object_type'], ['Person', 'Organization', 'Service', 'Group', 'Application'])) {
- self::updatePerson($object_data, $body);
- }
- break;
-
- case 'Delete':
- break;
-
- case 'Follow':
- self::followUser($object_data);
- break;
-
- case 'Accept':
- if ($object_data['object_type'] == 'Follow') {
- self::acceptFollowUser($object_data);
- }
- break;
-
- case 'Undo':
- if ($object_data['object_type'] == 'Follow') {
- self::undoFollowUser($object_data);
- } elseif (in_array($object_data['object_type'], ['Like', 'Dislike', 'Accept', 'Reject', 'TentativeAccept'])) {
- self::undoActivity($object_data);
- }
- break;
-
- default:
- logger('Unknown activity: ' . $activity['type'], LOGGER_DEBUG);
- break;
- }
- }
-
- /**
- * @brief
- *
- * @param array $activity
- * @param $actor
- *
- * @return
- */
- private static function getReceivers($activity, $actor)
- {
- $receivers = [];
-
- // When it is an answer, we inherite the receivers from the parent
- $replyto = JsonLD::fetchElement($activity, 'inReplyTo', 'id');
- if (!empty($replyto)) {
- $parents = Item::select(['uid'], ['uri' => $replyto]);
- while ($parent = Item::fetch($parents)) {
- $receivers['uid:' . $parent['uid']] = $parent['uid'];
- }
- }
-
- if (!empty($actor)) {
- $profile = APContact::getProfileByURL($actor);
- $followers = defaults($profile, 'followers', '');
-
- logger('Actor: ' . $actor . ' - Followers: ' . $followers, LOGGER_DEBUG);
- } else {
- logger('Empty actor', LOGGER_DEBUG);
- $followers = '';
- }
-
- $elements = ['to', 'cc', 'bto', 'bcc'];
- foreach ($elements as $element) {
- if (empty($activity[$element])) {
- continue;
- }
-
- // The receiver can be an arror or a string
- if (is_string($activity[$element])) {
- $activity[$element] = [$activity[$element]];
- }
-
- foreach ($activity[$element] as $receiver) {
- if ($receiver == self::PUBLIC) {
- $receivers['uid:0'] = 0;
- }
-
- if (($receiver == self::PUBLIC) && !empty($actor)) {
- // This will most likely catch all OStatus connections to Mastodon
- $condition = ['alias' => [$actor, normalise_link($actor)], 'rel' => [Contact::SHARING, Contact::FRIEND]];
- $contacts = DBA::select('contact', ['uid'], $condition);
- while ($contact = DBA::fetch($contacts)) {
- if ($contact['uid'] != 0) {
- $receivers['uid:' . $contact['uid']] = $contact['uid'];
- }
- }
- DBA::close($contacts);
- }
-
- if (in_array($receiver, [$followers, self::PUBLIC]) && !empty($actor)) {
- $condition = ['nurl' => normalise_link($actor), 'rel' => [Contact::SHARING, Contact::FRIEND],
- 'network' => Protocol::ACTIVITYPUB];
- $contacts = DBA::select('contact', ['uid'], $condition);
- while ($contact = DBA::fetch($contacts)) {
- if ($contact['uid'] != 0) {
- $receivers['uid:' . $contact['uid']] = $contact['uid'];
- }
- }
- DBA::close($contacts);
- continue;
- }
-
- $condition = ['self' => true, 'nurl' => normalise_link($receiver)];
- $contact = DBA::selectFirst('contact', ['uid'], $condition);
- if (!DBA::isResult($contact)) {
- continue;
- }
- $receivers['uid:' . $contact['uid']] = $contact['uid'];
- }
- }
-
- self::switchContacts($receivers, $actor);
-
- return $receivers;
- }
-
- /**
- * @brief
- *
- * @param $cid
- * @param $uid
- * @param $url
- */
- private static function switchContact($cid, $uid, $url)
- {
- $profile = ActivityPub::probeProfile($url);
- if (empty($profile)) {
- return;
- }
-
- logger('Switch contact ' . $cid . ' (' . $profile['url'] . ') for user ' . $uid . ' from OStatus to ActivityPub');
-
- $photo = $profile['photo'];
- unset($profile['photo']);
- unset($profile['baseurl']);
-
- $profile['nurl'] = normalise_link($profile['url']);
- DBA::update('contact', $profile, ['id' => $cid]);
-
- Contact::updateAvatar($photo, $uid, $cid);
- }
-
- /**
- * @brief
- *
- * @param $receivers
- * @param $actor
- */
- private static function switchContacts($receivers, $actor)
- {
- if (empty($actor)) {
- return;
- }
-
- foreach ($receivers as $receiver) {
- $contact = DBA::selectFirst('contact', ['id'], ['uid' => $receiver, 'network' => Protocol::OSTATUS, 'nurl' => normalise_link($actor)]);
- if (DBA::isResult($contact)) {
- self::switchContact($contact['id'], $receiver, $actor);
- }
-
- $contact = DBA::selectFirst('contact', ['id'], ['uid' => $receiver, 'network' => Protocol::OSTATUS, 'alias' => [normalise_link($actor), $actor]]);
- if (DBA::isResult($contact)) {
- self::switchContact($contact['id'], $receiver, $actor);
- }
- }
- }
-
- /**
- * @brief
- *
- * @param $object_data
- * @param array $activity
- *
- * @return
- */
- private static function addActivityFields($object_data, $activity)
- {
- if (!empty($activity['published']) && empty($object_data['published'])) {
- $object_data['published'] = $activity['published'];
- }
-
- if (!empty($activity['updated']) && empty($object_data['updated'])) {
- $object_data['updated'] = $activity['updated'];
- }
-
- if (!empty($activity['inReplyTo']) && empty($object_data['parent-uri'])) {
- $object_data['parent-uri'] = JsonLD::fetchElement($activity, 'inReplyTo', 'id');
- }
-
- if (!empty($activity['instrument'])) {
- $object_data['service'] = JsonLD::fetchElement($activity, 'instrument', 'name', 'type', 'Service');
- }
- return $object_data;
- }
-
- /**
- * @brief
- *
- * @param $object_id
- * @param $object
- * @param $trust_source
- *
- * @return
- */
- private static function fetchObject($object_id, $object = [], $trust_source = false)
- {
- if (!$trust_source || is_string($object)) {
- $data = self::fetchContent($object_id);
- if (empty($data)) {
- logger('Empty content for ' . $object_id . ', check if content is available locally.', LOGGER_DEBUG);
- $data = $object_id;
- } else {
- logger('Fetched content for ' . $object_id, LOGGER_DEBUG);
- }
- } else {
- logger('Using original object for url ' . $object_id, LOGGER_DEBUG);
- $data = $object;
- }
-
- if (is_string($data)) {
- $item = Item::selectFirst([], ['uri' => $data]);
- if (!DBA::isResult($item)) {
- logger('Object with url ' . $data . ' was not found locally.', LOGGER_DEBUG);
- return false;
- }
- logger('Using already stored item for url ' . $object_id, LOGGER_DEBUG);
- $data = self::CreateNote($item);
- }
-
- if (empty($data['type'])) {
- logger('Empty type', LOGGER_DEBUG);
- return false;
- }
-
- switch ($data['type']) {
- case 'Note':
- case 'Article':
- case 'Video':
- return self::ProcessObject($data);
-
- case 'Announce':
- if (empty($data['object'])) {
- return false;
- }
- return self::fetchObject($data['object']);
-
- case 'Person':
- case 'Tombstone':
- break;
-
- default:
- logger('Unknown object type: ' . $data['type'], LOGGER_DEBUG);
- break;
- }
- }
-
- /**
- * @brief
- *
- * @param $object
- *
- * @return
- */
- private static function ProcessObject(&$object)
- {
- if (empty($object['id'])) {
- return false;
- }
-
- $object_data = [];
- $object_data['object_type'] = $object['type'];
- $object_data['id'] = $object['id'];
-
- if (!empty($object['inReplyTo'])) {
- $object_data['reply-to-id'] = JsonLD::fetchElement($object, 'inReplyTo', 'id');
- } else {
- $object_data['reply-to-id'] = $object_data['id'];
- }
-
- $object_data['published'] = defaults($object, 'published', null);
- $object_data['updated'] = defaults($object, 'updated', $object_data['published']);
-
- if (empty($object_data['published']) && !empty($object_data['updated'])) {
- $object_data['published'] = $object_data['updated'];
- }
-
- $actor = JsonLD::fetchElement($object, 'attributedTo', 'id');
- if (empty($actor)) {
- $actor = defaults($object, 'actor', null);
- }
-
- $object_data['diaspora:guid'] = defaults($object, 'diaspora:guid', null);
- $object_data['owner'] = $object_data['author'] = $actor;
- $object_data['context'] = defaults($object, 'context', null);
- $object_data['conversation'] = defaults($object, 'conversation', null);
- $object_data['sensitive'] = defaults($object, 'sensitive', null);
- $object_data['name'] = defaults($object, 'title', null);
- $object_data['name'] = defaults($object, 'name', $object_data['name']);
- $object_data['summary'] = defaults($object, 'summary', null);
- $object_data['content'] = defaults($object, 'content', null);
- $object_data['source'] = defaults($object, 'source', null);
- $object_data['location'] = JsonLD::fetchElement($object, 'location', 'name', 'type', 'Place');
- $object_data['attachments'] = defaults($object, 'attachment', null);
- $object_data['tags'] = defaults($object, 'tag', null);
- $object_data['service'] = JsonLD::fetchElement($object, 'instrument', 'name', 'type', 'Service');
- $object_data['alternate-url'] = JsonLD::fetchElement($object, 'url', 'href');
- $object_data['receiver'] = self::getReceivers($object, $object_data['owner']);
-
- // Common object data:
-
- // Unhandled
- // @context, type, actor, signature, mediaType, duration, replies, icon
-
- // Also missing: (Defined in the standard, but currently unused)
- // audience, preview, endTime, startTime, generator, image
-
- // Data in Notes:
-
- // Unhandled
- // contentMap, announcement_count, announcements, context_id, likes, like_count
- // inReplyToStatusId, shares, quoteUrl, statusnetConversationId
-
- // Data in video:
-
- // To-Do?
- // category, licence, language, commentsEnabled
-
- // Unhandled
- // views, waitTranscoding, state, support, subtitleLanguage
- // likes, dislikes, shares, comments
-
- return $object_data;
- }
-
- /**
- * @brief Converts mentions from Pleroma into the Friendica format
- *
- * @param string $body
- *
- * @return converted body
- */
- private static function convertMentions($body)
- {
- $URLSearchString = "^\[\]";
- $body = preg_replace("/\[url\=([$URLSearchString]*)\]([#@!])(.*?)\[\/url\]/ism", '$2[url=$1]$3[/url]', $body);
-
- return $body;
- }
-
- /**
- * @brief Constructs a string with tags for a given tag array
- *
- * @param array $tags
- * @param boolean $sensitive
- *
- * @return string with tags
- */
- private static function constructTagList($tags, $sensitive)
- {
- if (empty($tags)) {
- return '';