get_curl_code(); logger('Transmit to ' . $target . ' returned ' . $return_code); } /** * Return the ActivityPub profile of the given user * * @param integer $uid User ID * @return array */ public static function profile($uid) { $accounttype = ['Person', 'Organization', 'Service', 'Group', 'Application']; $condition = ['uid' => $uid, 'blocked' => false, 'account_expired' => false, 'account_removed' => false, 'verified' => true]; $fields = ['guid', 'nickname', 'pubkey', 'account-type', 'page-flags']; $user = DBA::selectFirst('user', $fields, $condition); if (!DBA::isResult($user)) { return []; } $fields = ['locality', 'region', 'country-name']; $profile = DBA::selectFirst('profile', $fields, ['uid' => $uid, 'is-default' => true]); if (!DBA::isResult($profile)) { return []; } $fields = ['name', 'url', 'location', 'about', 'avatar']; $contact = DBA::selectFirst('contact', $fields, ['uid' => $uid, 'self' => true]); if (!DBA::isResult($contact)) { return []; } $data = ['@context' => ['https://www.w3.org/ns/activitystreams', 'https://w3id.org/security/v1', ['vcard' => 'http://www.w3.org/2006/vcard/ns#', 'uuid' => 'http://schema.org/identifier', 'sensitive' => 'as:sensitive', 'manuallyApprovesFollowers' => 'as:manuallyApprovesFollowers']]]; $data['id'] = $contact['url']; $data['uuid'] = $user['guid']; $data['type'] = $accounttype[$user['account-type']]; $data['following'] = System::baseUrl() . '/following/' . $user['nickname']; $data['followers'] = System::baseUrl() . '/followers/' . $user['nickname']; $data['inbox'] = System::baseUrl() . '/inbox/' . $user['nickname']; $data['outbox'] = System::baseUrl() . '/outbox/' . $user['nickname']; $data['preferredUsername'] = $user['nickname']; $data['name'] = $contact['name']; $data['vcard:hasAddress'] = ['@type' => 'vcard:Home', 'vcard:country-name' => $profile['country-name'], 'vcard:region' => $profile['region'], 'vcard:locality' => $profile['locality']]; $data['summary'] = $contact['about']; $data['url'] = $contact['url']; $data['manuallyApprovesFollowers'] = in_array($user['page-flags'], [Contact::PAGE_NORMAL, Contact::PAGE_PRVGROUP]); $data['publicKey'] = ['id' => $contact['url'] . '#main-key', 'owner' => $contact['url'], 'publicKeyPem' => $user['pubkey']]; $data['endpoints'] = ['sharedInbox' => System::baseUrl() . '/inbox']; $data['icon'] = ['type' => 'Image', 'url' => $contact['avatar']]; // tags: https://kitty.town/@inmysocks/100656097926961126.json return $data; } public static function createPermissionBlockForItem($item) { $data = ['to' => [], 'cc' => []]; $terms = Term::tagArrayFromItemId($item['id']); if (!$item['private']) { $data['to'][] = self::PUBLIC; $data['cc'][] = System::baseUrl() . '/followers/' . $item['author-nick']; foreach ($terms as $term) { if ($term['type'] != TERM_MENTION) { continue; } $profile = self::fetchprofile($term['url']); if (!empty($profile)) { $data['cc'][] = $profile['url']; } } } else { //$data['cc'][] = System::baseUrl() . '/followers/' . $item['author-nick']; $receiver_list = Item::enumeratePermissions($item); $mentioned = []; foreach ($terms as $term) { if ($term['type'] != TERM_MENTION) { continue; } $cid = Contact::getIdForURL($term['url'], $item['uid']); if (!empty($cid) && in_array($cid, $receiver_list)) { $contact = DBA::selectFirst('contact', ['url'], ['id' => $cid, 'network' => Protocol::ACTIVITYPUB]); $data['to'][] = $contact['url']; } } foreach ($receiver_list as $receiver) { $contact = DBA::selectFirst('contact', ['url'], ['id' => $receiver, 'network' => Protocol::ACTIVITYPUB]); $data['cc'][] = $contact['url']; } if (empty($data['to'])) { $data['to'] = $data['cc']; $data['cc'] = []; } } return $data; } public static function fetchTargetInboxes($item) { $inboxes = []; $terms = Term::tagArrayFromItemId($item['id']); if (!$item['private']) { $contacts = DBA::select('contact', ['notify', 'batch'], ['uid' => $item['uid'], 'rel' => [Contact::FOLLOWER, Contact::FRIEND], 'network' => Protocol::ACTIVITYPUB]); while ($contact = DBA::fetch($contacts)) { $contact = defaults($contact, 'batch', $contact['notify']); $inboxes[$contact] = $contact; } DBA::close($contacts); foreach ($terms as $term) { if ($term['type'] != TERM_MENTION) { continue; } $profile = self::fetchprofile($term['url']); if (!empty($profile)) { $target = defaults($profile, 'sharedinbox', $profile['inbox']); $inboxes[$target] = $target; } } } else { $receiver_list = Item::enumeratePermissions($item); $mentioned = []; foreach ($terms as $term) { if ($term['type'] != TERM_MENTION) { continue; } $cid = Contact::getIdForURL($term['url'], $item['uid']); if (!empty($cid) && in_array($cid, $receiver_list)) { $contact = DBA::selectFirst('contact', ['url'], ['id' => $cid, 'network' => Protocol::ACTIVITYPUB]); $profile = self::fetchprofile($contact['url']); if (!empty($profile['network'])) { $target = defaults($profile, 'sharedinbox', $profile['inbox']); $inboxes[$target] = $target; } } } foreach ($receiver_list as $receiver) { $contact = DBA::selectFirst('contact', ['url'], ['id' => $receiver, 'network' => Protocol::ACTIVITYPUB]); $profile = self::fetchprofile($contact['url']); if (!empty($profile['network'])) { $target = defaults($profile, 'sharedinbox', $profile['inbox']); $inboxes[$target] = $target; } } } $profile = self::fetchprofile($item['author-link']); if (!empty($profile['sharedinbox'])) { unset($inboxes[$profile['sharedinbox']]); } if (!empty($profile['inbox'])) { unset($inboxes[$profile['inbox']]); } return $inboxes; } public static function createActivityFromItem($item_id) { $item = Item::selectFirst([], ['id' => $item_id]); if (!DBA::isResult($item)) { return false; } $condition = ['item-uri' => $item['uri'], 'protocol' => Conversation::PARCEL_ACTIVITYPUB]; $conversation = DBA::selectFirst('conversation', ['source'], $condition); if (DBA::isResult($conversation)) { $data = json_decode($conversation['source']); if (!empty($data)) { return $data; } } $data = ['@context' => ['https://www.w3.org/ns/activitystreams', 'https://w3id.org/security/v1', ['ostatus' => 'http://ostatus.org#', 'sensitive' => 'as:sensitive', 'Hashtag' => 'as:Hashtag', 'atomUri' => 'ostatus:atomUri', 'conversation' => 'ostatus:conversation', 'inReplyToAtomUri' => 'ostatus:inReplyToAtomUri']]]; $data['type'] = 'Create'; $data['id'] = $item['uri'] . '#activity'; $data['actor'] = $item['author-link']; $data['published'] = DateTimeFormat::utc($item["created"]."+00:00", DateTimeFormat::ATOM); if ($item["created"] != $item["edited"]) { $data['updated'] = DateTimeFormat::utc($item["edited"]."+00:00", DateTimeFormat::ATOM); } $data = array_merge($data, ActivityPub::createPermissionBlockForItem($item)); $data['object'] = self::createNote($item); return $data; } public static function createObjectFromItemID($item_id) { $item = Item::selectFirst([], ['id' => $item_id]); if (!DBA::isResult($item)) { return false; } $data = ['@context' => ['https://www.w3.org/ns/activitystreams', 'https://w3id.org/security/v1', ['ostatus' => 'http://ostatus.org#', 'sensitive' => 'as:sensitive', 'Hashtag' => 'as:Hashtag', 'atomUri' => 'ostatus:atomUri', 'conversation' => 'ostatus:conversation', 'inReplyToAtomUri' => 'ostatus:inReplyToAtomUri']]]; $data = array_merge($data, self::createNote($item)); return $data; } private static function createTagList($item) { $tags = []; $terms = Term::tagArrayFromItemId($item['id']); foreach ($terms as $term) { if ($term['type'] == TERM_MENTION) { $contact = Contact::getDetailsByURL($term['url']); if (!empty($contact['addr'])) { $mention = '@' . $contact['addr']; } else { $mention = '@' . $term['url']; } $tags[] = ['type' => 'Mention', 'href' => $term['url'], 'name' => $mention]; } } return $tags; } public static function createNote($item) { $data = []; $data['type'] = 'Note'; $data['id'] = $item['uri']; if ($item['uri'] != $item['thr-parent']) { $data['inReplyTo'] = $item['thr-parent']; } $conversation = DBA::selectFirst('conversation', ['conversation-uri'], ['item-uri' => $item['parent-uri']]); if (DBA::isResult($conversation) && !empty($conversation['conversation-uri'])) { $conversation_uri = $conversation['conversation-uri']; } else { $conversation_uri = $item['parent-uri']; } $data['context'] = $data['conversation'] = $conversation_uri; $data['actor'] = $item['author-link']; $data = array_merge($data, ActivityPub::createPermissionBlockForItem($item)); $data['published'] = DateTimeFormat::utc($item["created"]."+00:00", DateTimeFormat::ATOM); if ($item["created"] != $item["edited"]) { $data['updated'] = DateTimeFormat::utc($item["edited"]."+00:00", DateTimeFormat::ATOM); } $data['attributedTo'] = $item['author-link']; $data['name'] = BBCode::convert($item['title'], false, 7); $data['content'] = BBCode::convert($item['body'], false, 7); $data['source'] = ['content' => $item['body'], 'mediaType' => "text/bbcode"]; $data['summary'] = ''; // Ignore by now $data['sensitive'] = false; // - Query NSFW //$data['emoji'] = []; // Ignore by now $data['tag'] = self::createTagList($item); $data['attachment'] = []; // @ToDo return $data; } public static function transmitActivity($activity, $target, $uid) { $profile = self::fetchprofile($target); $owner = User::getOwnerDataById($uid); $data = ['@context' => 'https://www.w3.org/ns/activitystreams', 'id' => System::baseUrl() . '/activity/' . System::createGUID(), 'type' => $activity, 'actor' => $owner['url'], 'object' => $profile['url'], 'to' => $profile['url']]; logger('Sending activity ' . $activity . ' to ' . $target . ' for user ' . $uid, LOGGER_DEBUG); return self::transmit($data, $profile['inbox'], $uid); } public static function transmitContactAccept($target, $id, $uid) { $profile = self::fetchprofile($target); $owner = User::getOwnerDataById($uid); $data = ['@context' => 'https://www.w3.org/ns/activitystreams', 'id' => System::baseUrl() . '/activity/' . System::createGUID(), 'type' => 'Accept', 'actor' => $owner['url'], 'object' => ['id' => $id, 'type' => 'Follow', 'actor' => $profile['url'], 'object' => $owner['url']], 'to' => $profile['url']]; logger('Sending accept to ' . $target . ' for user ' . $uid . ' with id ' . $id, LOGGER_DEBUG); return self::transmit($data, $profile['inbox'], $uid); } public static function transmitContactReject($target, $id, $uid) { $profile = self::fetchprofile($target); $owner = User::getOwnerDataById($uid); $data = ['@context' => 'https://www.w3.org/ns/activitystreams', 'id' => System::baseUrl() . '/activity/' . System::createGUID(), 'type' => 'Reject', 'actor' => $owner['url'], 'object' => ['id' => $id, 'type' => 'Follow', 'actor' => $profile['url'], 'object' => $owner['url']], 'to' => $profile['url']]; logger('Sending reject to ' . $target . ' for user ' . $uid . ' with id ' . $id, LOGGER_DEBUG); return self::transmit($data, $profile['inbox'], $uid); } public static function transmitContactUndo($target, $uid) { $profile = self::fetchprofile($target); $id = System::baseUrl() . '/activity/' . System::createGUID(); $owner = User::getOwnerDataById($uid); $data = ['@context' => 'https://www.w3.org/ns/activitystreams', 'id' => $id, 'type' => 'Undo', 'actor' => $owner['url'], 'object' => ['id' => $id, 'type' => 'Follow', 'actor' => $owner['url'], 'object' => $profile['url']], 'to' => $profile['url']]; logger('Sending undo to ' . $target . ' for user ' . $uid . ' with id ' . $id, LOGGER_DEBUG); return self::transmit($data, $profile['inbox'], $uid); } /** * Fetches ActivityPub content from the given url * * @param string $url content url * @return array */ public static function fetchContent($url) { $ret = Network::curl($url, false, $redirects, ['accept_content' => 'application/activity+json, application/ld+json']); if (!$ret['success'] || empty($ret['body'])) { return; } return json_decode($ret['body'], true); } /** * Resolves the profile url from the address by using webfinger * * @param string $addr profile address (user@domain.tld) * @return string url */ private static function addrToUrl($addr) { $addr_parts = explode('@', $addr); if (count($addr_parts) != 2) { return false; } $webfinger = 'https://' . $addr_parts[1] . '/.well-known/webfinger?resource=acct:' . urlencode($addr); $ret = Network::curl($webfinger, false, $redirects, ['accept_content' => 'application/jrd+json,application/json']); if (!$ret['success'] || empty($ret['body'])) { return false; } $data = json_decode($ret['body'], true); if (empty($data['links'])) { return false; } foreach ($data['links'] as $link) { if (empty($link['href']) || empty($link['rel']) || empty($link['type'])) { continue; } if (($link['rel'] == 'self') && ($link['type'] == 'application/activity+json')) { return $link['href']; } } return false; } public static function verifySignature($content, $http_headers) { $object = json_decode($content, true); if (empty($object)) { return false; } $actor = JsonLD::fetchElement($object, 'actor', 'id'); $headers = []; $headers['(request-target)'] = strtolower($http_headers['REQUEST_METHOD']) . ' ' . $http_headers['REQUEST_URI']; // First take every header foreach ($http_headers as $k => $v) { $field = str_replace('_', '-', strtolower($k)); $headers[$field] = $v; } // Now add every http header foreach ($http_headers as $k => $v) { if (strpos($k, 'HTTP_') === 0) { $field = str_replace('_', '-', strtolower(substr($k, 5))); $headers[$field] = $v; } } $sig_block = ActivityPub::parseSigHeader($http_headers['HTTP_SIGNATURE']); if (empty($sig_block) || empty($sig_block['headers']) || empty($sig_block['keyId'])) { return false; } $signed_data = ''; foreach ($sig_block['headers'] as $h) { if (array_key_exists($h, $headers)) { $signed_data .= $h . ': ' . $headers[$h] . "\n"; } } $signed_data = rtrim($signed_data, "\n"); if (empty($signed_data)) { return false; } $algorithm = null; if ($sig_block['algorithm'] === 'rsa-sha256') { $algorithm = 'sha256'; } if ($sig_block['algorithm'] === 'rsa-sha512') { $algorithm = 'sha512'; } if (empty($algorithm)) { return false; } $key = self::fetchKey($sig_block['keyId'], $actor); if (empty($key)) { return false; } if (!Crypto::rsaVerify($signed_data, $sig_block['signature'], $key, $algorithm)) { return false; } // Check the digest when it is part of the signed data if (in_array('digest', $sig_block['headers'])) { $digest = explode('=', $headers['digest'], 2); if ($digest[0] === 'SHA-256') { $hashalg = 'sha256'; } if ($digest[0] === 'SHA-512') { $hashalg = 'sha512'; } /// @todo add all hashes from the rfc if (!empty($hashalg) && base64_encode(hash($hashalg, $content, true)) != $digest[1]) { return false; } } // Check the content-length when it is part of the signed data if (in_array('content-length', $sig_block['headers'])) { if (strlen($content) != $headers['content-length']) { return false; } } return true; } private static function fetchKey($id, $actor) { $url = (strpos($id, '#') ? substr($id, 0, strpos($id, '#')) : $id); $profile = self::fetchprofile($url); if (!empty($profile)) { return $profile['pubkey']; } elseif ($url != $actor) { $profile = self::fetchprofile($actor); if (!empty($profile)) { return $profile['pubkey']; } } return false; } /** * @brief * * @param string $header * @return array associate array with * - \e string \b keyID * - \e string \b algorithm * - \e array \b headers * - \e string \b signature */ private static function parseSigHeader($header) { $ret = []; $matches = []; if (preg_match('/keyId="(.*?)"/ism',$header,$matches)) { $ret['keyId'] = $matches[1]; } if (preg_match('/algorithm="(.*?)"/ism',$header,$matches)) { $ret['algorithm'] = $matches[1]; } if (preg_match('/headers="(.*?)"/ism',$header,$matches)) { $ret['headers'] = explode(' ', $matches[1]); } if (preg_match('/signature="(.*?)"/ism',$header,$matches)) { $ret['signature'] = base64_decode(preg_replace('/\s+/','',$matches[1])); } return $ret; } public static function fetchprofile($url, $update = false) { if (empty($url)) { return false; } if (!$update) { $apcontact = DBA::selectFirst('apcontact', [], ['url' => $url]); if (DBA::isResult($apcontact)) { return $apcontact; } $apcontact = DBA::selectFirst('apcontact', [], ['alias' => $url]); if (DBA::isResult($apcontact)) { return $apcontact; } $apcontact = DBA::selectFirst('apcontact', [], ['addr' => $url]); if (DBA::isResult($apcontact)) { return $apcontact; } } if (empty(parse_url($url, PHP_URL_SCHEME))) { $url = self::addrToUrl($url); if (empty($url)) { return false; } } $data = self::fetchContent($url); if (empty($data) || empty($data['id']) || empty($data['inbox'])) { return false; } $apcontact = []; $apcontact['url'] = $data['id']; $apcontact['uuid'] = defaults($data, 'uuid', null); $apcontact['type'] = defaults($data, 'type', null); $apcontact['following'] = defaults($data, 'following', null); $apcontact['followers'] = defaults($data, 'followers', null); $apcontact['inbox'] = defaults($data, 'inbox', null); $apcontact['outbox'] = defaults($data, 'outbox', null); $apcontact['sharedinbox'] = JsonLD::fetchElement($data, 'endpoints', 'sharedInbox'); $apcontact['nick'] = defaults($data, 'preferredUsername', null); $apcontact['name'] = defaults($data, 'name', $apcontact['nick']); $apcontact['about'] = defaults($data, 'summary', ''); $apcontact['photo'] = JsonLD::fetchElement($data, 'icon', 'url'); $apcontact['alias'] = JsonLD::fetchElement($data, 'url', 'href'); $parts = parse_url($apcontact['url']); unset($parts['scheme']); unset($parts['path']); $apcontact['addr'] = $apcontact['nick'] . '@' . str_replace('//', '', Network::unparseURL($parts)); $apcontact['pubkey'] = trim(JsonLD::fetchElement($data, 'publicKey', 'publicKeyPem')); // To-Do // manuallyApprovesFollowers // Unhandled // @context, tag, attachment, image, nomadicLocations, signature, following, followers, featured, movedTo, liked // Unhandled from Misskey // sharedInbox, isCat // Unhandled from Kroeg // kroeg:blocks, updated // Check if the address is resolvable if (self::addrToUrl($apcontact['addr']) == $apcontact['url']) { $parts = parse_url($apcontact['url']); unset($parts['path']); $apcontact['baseurl'] = Network::unparseURL($parts); } else { $apcontact['addr'] = null; } if ($apcontact['url'] == $apcontact['alias']) { $apcontact['alias'] = null; } $apcontact['updated'] = DateTimeFormat::utcNow(); DBA::update('apcontact', $apcontact, ['url' => $url], true); return $apcontact; } /** * Fetches a profile from the given url into an array that is compatible to Probe::uri * * @param string $url profile url * @return array */ public static function probeProfile($url) { $apcontact = self::fetchprofile($url, true); if (empty($apcontact)) { return false; } $profile = ['network' => Protocol::ACTIVITYPUB]; $profile['nick'] = $apcontact['nick']; $profile['name'] = $apcontact['name']; $profile['guid'] = $apcontact['uuid']; $profile['url'] = $apcontact['url']; $profile['addr'] = $apcontact['addr']; $profile['alias'] = $apcontact['alias']; $profile['photo'] = $apcontact['photo']; // $profile['community'] // $profile['keywords'] // $profile['location'] $profile['about'] = $apcontact['about']; $profile['batch'] = $apcontact['sharedinbox']; $profile['notify'] = $apcontact['inbox']; $profile['poll'] = $apcontact['outbox']; $profile['pubkey'] = $apcontact['pubkey']; $profile['baseurl'] = $apcontact['baseurl']; // Remove all "null" fields foreach ($profile as $field => $content) { if (is_null($content)) { unset($profile[$field]); } } return $profile; } public static function processInbox($body, $header, $uid) { logger('Incoming message for user ' . $uid, LOGGER_DEBUG); if (!self::verifySignature($body, $header)) { logger('Invalid signature, message will be discarded.', LOGGER_DEBUG); return; } $activity = json_decode($body, true); if (!is_array($activity)) { logger('Invalid body.', LOGGER_DEBUG); return; } self::processActivity($activity, $body, $uid); } public static function fetchOutbox($url) { $data = self::fetchContent($url); if (empty($data)) { return; } if (!empty($data['orderedItems'])) { $items = $data['orderedItems']; } elseif (!empty($data['first']['orderedItems'])) { $items = $data['first']['orderedItems']; } elseif (!empty($data['first'])) { self::fetchOutbox($data['first']); return; } else { $items = []; } foreach ($items as $activity) { self::processActivity($activity); } } private static function prepareObjectData($activity, $uid) { $actor = JsonLD::fetchElement($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); $public = in_array(0, $receivers); if (is_string($activity['object'])) { $object_url = $activity['object']; } elseif (!empty($activity['object']['id'])) { $object_url = $activity['object']['id']; } else { logger('No object found', LOGGER_DEBUG); return []; } // Fetch the content only on activities where this matters if (in_array($activity['type'], ['Create', 'Update', 'Announce'])) { $object_data = self::fetchObject($object_url, $activity['object']); if (empty($object_data)) { logger("Object data couldn't be processed", LOGGER_DEBUG); return []; } } elseif ($activity['type'] == 'Accept') { $object_data = []; $object_data['object_type'] = JsonLD::fetchElement($activity, 'object', 'type'); $object_data['object'] = JsonLD::fetchElement($activity, 'object', 'actor'); } elseif ($activity['type'] == 'Undo') { $object_data = []; $object_data['object_type'] = JsonLD::fetchElement($activity, 'object', 'type'); $object_data['object'] = JsonLD::fetchElement($activity, 'object', 'object'); } 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. $object_data = self::processCommonData($activity); $object_data['name'] = $activity['type']; $object_data['author'] = $activity['actor']; $object_data['object'] = $object_url; } elseif ($activity['type'] == 'Follow') { $object_data['id'] = $activity['id']; $object_data['object'] = $object_url; } else { $object_data = []; } $object_data = self::addActivityFields($object_data, $activity); $object_data['type'] = $activity['type']; $object_data['owner'] = $actor; $object_data['receiver'] = array_merge(defaults($object_data, 'receiver', []), $receivers); return $object_data; } private static function processActivity($activity, $body = '', $uid = null) { if (empty($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; } // Non standard // title, atomUri, context_id, statusnetConversationId // To-Do? // context, location, signature; logger('Processing activity: ' . $activity['type'], LOGGER_DEBUG); $object_data = self::prepareObjectData($activity, $uid); if (empty($object_data)) { logger('No object data found', LOGGER_DEBUG); return; } switch ($activity['type']) { case 'Create': case 'Announce': self::createItem($object_data, $body); break; case 'Like': self::likeItem($object_data, $body); break; case 'Dislike': break; case 'Update': break; case 'Delete': break; case 'Follow': self::followUser($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); } break; default: logger('Unknown activity: ' . $activity['type'], LOGGER_DEBUG); break; } } private static function getReceivers($activity, $actor) { $receivers = []; if (!empty($actor)) { $profile = self::fetchprofile($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']; } } return $receivers; } private static function addActivityFields($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 $object_data; } private static function fetchObject($object_url, $object = [], $public = true) { if ($public) { $data = self::fetchContent($object_url); if (empty($data)) { logger('Empty content for ' . $object_url . ', check if content is available locally.', LOGGER_DEBUG); $data = $object_url; $data = $object; } } else { logger('Using original object for url ' . $object_url, 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_url, LOGGER_DEBUG); $data = self::createNote($item); } if (empty($data['type'])) { logger('Empty type', LOGGER_DEBUG); return false; } else { $type = $data['type']; logger('Type ' . $type, LOGGER_DEBUG); } if (in_array($type, ['Note', 'Article', 'Video'])) { $common = self::processCommonData($data); } switch ($type) { case 'Note': return array_merge($common, self::processNote($data)); case 'Article': return array_merge($common, self::processArticle($data)); case 'Video': return array_merge($common, self::processVideo($data)); case 'Announce': if (empty($data['object'])) { return false; } return self::fetchObject($data['object']); case 'Person': case 'Tombstone': break; default: logger('Unknown object type: ' . $data['type'], LOGGER_DEBUG); break; } } private static function processCommonData(&$object) { if (empty($object['id'])) { return false; } $object_data = []; $object_data['type'] = $object['type']; $object_data['uri'] = $object['id']; if (!empty($object['inReplyTo'])) { $object_data['reply-to-uri'] = JsonLD::fetchElement($object, 'inReplyTo', 'id'); } else { $object_data['reply-to-uri'] = $object_data['uri']; } $object_data['published'] = defaults($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']; } $object_data['uuid'] = defaults($object, 'uuid', null); $object_data['owner'] = $object_data['author'] = JsonLD::fetchElement($object, 'attributedTo', 'id'); $object_data['context'] = defaults($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']); // Unhandled // @context, type, actor, signature, mediaType, duration, replies, icon // Also missing: (Defined in the standard, but currently unused) // audience, preview, endTime, startTime, generator, image return $object_data; } private static function processNote($object) { $object_data = []; // To-Do? // emoji, atomUri, inReplyToAtomUri // Unhandled // contentMap, announcement_count, announcements, context_id, likes, like_count // inReplyToStatusId, shares, quoteUrl, statusnetConversationId return $object_data; } private static function processArticle($object) { $object_data = []; return $object_data; } private static function processVideo($object) { $object_data = []; // To-Do? // category, licence, language, commentsEnabled // Unhandled // views, waitTranscoding, state, support, subtitleLanguage // likes, dislikes, shares, comments return $object_data; } private static function convertMentions($body) { $URLSearchString = "^\[\]"; $body = preg_replace("/\[url\=([$URLSearchString]*)\]([#@!])(.*?)\[\/url\]/ism", '$2[url=$1]$3[/url]', $body); return $body; } private static function constructTagList($tags, $sensitive) { if (empty($tags)) { return ''; } $tag_text = ''; foreach ($tags as $tag) { if (in_array($tag['type'], ['Mention', 'Hashtag'])) { if (!empty($tag_text)) { $tag_text .= ','; } if (empty($tag['href'])) { //$tag['href'] logger('Blubb!'); } $tag_text .= substr($tag['name'], 0, 1) . '[url=' . $tag['href'] . ']' . substr($tag['name'], 1) . '[/url]'; } } /// @todo add nsfw for $sensitive return $tag_text; } private static function constructAttachList($attachments, $item) { if (empty($attachments)) { return $item; } foreach ($attachments as $attach) { $filetype = strtolower(substr($attach['mediaType'], 0, strpos($attach['mediaType'], '/'))); if ($filetype == 'image') { $item['body'] .= "\n[img]".$attach['url'].'[/img]'; } else { if (!empty($item["attach"])) { $item["attach"] .= ','; } else { $item["attach"] = ''; } if (!isset($attach['length'])) { $attach['length'] = "0"; } $item["attach"] .= '[attach]href="'.$attach['url'].'" length="'.$attach['length'].'" type="'.$attach['mediaType'].'" title="'.defaults($attach, 'name', '').'"[/attach]'; } } return $item; } private static function createItem($activity, $body) { $item = []; $item['verb'] = ACTIVITY_POST; $item['parent-uri'] = $activity['reply-to-uri']; if ($activity['reply-to-uri'] == $activity['uri']) { $item['gravity'] = GRAVITY_PARENT; $item['object-type'] = ACTIVITY_OBJ_NOTE; } else { $item['gravity'] = GRAVITY_COMMENT; $item['object-type'] = ACTIVITY_OBJ_COMMENT; } if (($activity['uri'] != $activity['reply-to-uri']) && !Item::exists(['uri' => $activity['reply-to-uri']])) { logger('Parent ' . $activity['reply-to-uri'] . ' not found. Try to refetch it.'); self::fetchMissingActivity($activity['reply-to-uri'], $activity); } self::postItem($activity, $item, $body); } private static function likeItem($activity, $body) { $item = []; $item['verb'] = ACTIVITY_LIKE; $item['parent-uri'] = $activity['object']; $item['gravity'] = GRAVITY_ACTIVITY; $item['object-type'] = ACTIVITY_OBJ_NOTE; self::postItem($activity, $item, $body); } private static function postItem($activity, $item, $body) { /// @todo What to do with $activity['context']? $item['network'] = Protocol::ACTIVITYPUB; $item['private'] = !in_array(0, $activity['receiver']); $item['author-id'] = Contact::getIdForURL($activity['author'], 0, true); $item['owner-id'] = Contact::getIdForURL($activity['owner'], 0, true); $item['uri'] = $activity['uri']; $item['created'] = $activity['published']; $item['edited'] = $activity['updated']; $item['guid'] = $activity['uuid']; $item['title'] = HTML::toBBCode($activity['name']); $item['content-warning'] = HTML::toBBCode($activity['summary']); $item['body'] = self::convertMentions(HTML::toBBCode($activity['content'])); $item['location'] = $activity['location']; $item['tag'] = self::constructTagList($activity['tags'], $activity['sensitive']); $item['app'] = $activity['service']; $item['plink'] = defaults($activity, 'alternate-url', $item['uri']); $item = self::constructAttachList($activity['attachments'], $item); $source = JsonLD::fetchElement($activity, 'source', 'content', 'mediaType', 'text/bbcode'); if (!empty($source)) { $item['body'] = $source; } $item['protocol'] = Conversation::PARCEL_ACTIVITYPUB; $item['source'] = $body; $item['conversation-uri'] = $activity['conversation']; foreach ($activity['receiver'] as $receiver) { $item['uid'] = $receiver; $item['contact-id'] = Contact::getIdForURL($activity['author'], $receiver, true); if (($receiver != 0) && empty($item['contact-id'])) { $item['contact-id'] = Contact::getIdForURL($activity['author'], 0, true); } $item_id = Item::insert($item); logger('Storing for user ' . $item['uid'] . ': ' . $item_id); } } private static function fetchMissingActivity($url, $child) { $object = ActivityPub::fetchContent($url); if (empty($object)) { logger('Activity ' . $url . ' was not fetchable, aborting.'); return; } $activity = []; $activity['@context'] = $object['@context']; unset($object['@context']); $activity['id'] = $object['id']; $activity['to'] = defaults($object, 'to', []); $activity['cc'] = defaults($object, 'cc', []); $activity['actor'] = $child['author']; $activity['object'] = $object; $activity['published'] = $object['published']; $activity['type'] = 'Create'; self::processActivity($activity); logger('Activity ' . $url . ' had been fetched and processed.'); } private static function getUserOfObject($object) { $self = DBA::selectFirst('contact', ['uid'], ['nurl' => normalise_link($object), 'self' => true]); if (!DBA::isResult($self)) { return false; } else { return $self['uid']; } } private static function followUser($activity) { $uid = self::getUserOfObject($activity['object']); if (empty($uid)) { return; } $owner = User::getOwnerDataById($uid); $cid = Contact::getIdForURL($activity['owner'], $uid); if (!empty($cid)) { $contact = DBA::selectFirst('contact', [], ['id' => $cid]); } else { $contact = false; } $item = ['author-id' => Contact::getIdForURL($activity['owner']), 'author-link' => $activity['owner']]; Contact::addRelationship($owner, $contact, $item); $cid = Contact::getIdForURL($activity['owner'], $uid); if (empty($cid)) { return; } $contact = DBA::selectFirst('contact', ['network'], ['id' => $cid]); if ($contact['network'] != Protocol::ACTIVITYPUB) { Contact::updateFromProbe($cid, Protocol::ACTIVITYPUB); } DBA::update('contact', ['hub-verify' => $activity['id']], ['id' => $cid]); logger('Follow user ' . $uid . ' from contact ' . $cid . ' with id ' . $activity['id']); } private static function acceptFollowUser($activity) { $uid = self::getUserOfObject($activity['object']); if (empty($uid)) { return; } $owner = User::getOwnerDataById($uid); $cid = Contact::getIdForURL($activity['owner'], $uid); if (empty($cid)) { logger('No contact found for ' . $activity['owner'], LOGGER_DEBUG); return; } $fields = ['pending' => false]; $contact = DBA::selectFirst('contact', ['rel'], ['id' => $cid]); if ($contact['rel'] == Contact::FOLLOWER) { $fields['rel'] = Contact::FRIEND; } $condition = ['id' => $cid]; DBA::update('contact', $fields, $condition); logger('Accept contact request from contact ' . $cid . ' for user ' . $uid, LOGGER_DEBUG); } private static function undoFollowUser($activity) { $uid = self::getUserOfObject($activity['object']); if (empty($uid)) { return; } $owner = User::getOwnerDataById($uid); $cid = Contact::getIdForURL($activity['owner'], $uid); if (empty($cid)) { logger('No contact found for ' . $activity['owner'], LOGGER_DEBUG); return; } $contact = DBA::selectFirst('contact', [], ['id' => $cid]); if (!DBA::isResult($contact)) { return; } Contact::removeFollower($owner, $contact); logger('Undo following request from contact ' . $cid . ' for user ' . $uid, LOGGER_DEBUG); } }