X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FProtocol%2FActivityPub.php;h=ef4a48479ea2a4c677704763af81d10272e443a8;hb=ec898ecd2a6a79e1e8a6a9dda94e90393eb08487;hp=85d21d7cbaf5a28ccb35480ffb7a2ef9a55551c4;hpb=a7f5c1f4c63136901a72269ec0fdfb1f6db3e4e5;p=friendica.git diff --git a/src/Protocol/ActivityPub.php b/src/Protocol/ActivityPub.php index 85d21d7cba..ef4a48479e 100644 --- a/src/Protocol/ActivityPub.php +++ b/src/Protocol/ActivityPub.php @@ -12,13 +12,18 @@ use Friendica\Util\HTTPSignature; use Friendica\Core\Protocol; use Friendica\Model\Conversation; use Friendica\Model\Contact; +use Friendica\Model\APContact; use Friendica\Model\Item; +use Friendica\Model\Profile; +use Friendica\Model\Term; use Friendica\Model\User; use Friendica\Util\DateTimeFormat; use Friendica\Util\Crypto; use Friendica\Content\Text\BBCode; use Friendica\Content\Text\HTML; -use Friendica\Network\Probe; +use Friendica\Util\JsonLD; +use Friendica\Util\LDSignature; +use Friendica\Core\Config; /** * @brief ActivityPub Protocol class @@ -33,70 +38,213 @@ use Friendica\Network\Probe; * Digest: https://tools.ietf.org/html/rfc5843 * https://tools.ietf.org/html/draft-cavage-http-signatures-10#ref-15 * - * Part of the code for HTTP signing is taken from the Osada project. - * https://framagit.org/macgirvin/osada + * Mastodon implementation of supported activities: + * https://github.com/tootsuite/mastodon/blob/master/app/lib/activitypub/activity.rb#L26 * * To-do: * * Receiver: - * - Activities: Dislike, Update, Delete - * - Object Types: Person, Tombstome + * - Update (Image, Video, Article, Note) + * - Event + * - Undo Announce + * + * Check what this is meant to do: + * - Add + * - Block + * - Flag + * - Remove + * - Undo Block + * - Undo Accept (Problem: This could invert a contact accept or an event accept) * * Transmitter: - * - Activities: Like, Dislike, Update, Delete - * - Object Tyoes: Article, Announce, Person, Tombstone + * - Event + * + * Complicated: + * - Announce + * - Undo Announce * * General: - * - Message distribution - * - Endpoints: Outbox, Object, Follower, Following - * - General cleanup + * - Attachments + * - nsfw (sensitive) + * - Queueing unsucessful deliveries + * - Polling the outboxes for missing content? + * - Possibly using the LD-JSON parser */ class ActivityPub { - const PUBLIC = 'https://www.w3.org/ns/activitystreams#Public'; + const PUBLIC_COLLECTION = 'https://www.w3.org/ns/activitystreams#Public'; + const CONTEXT = ['https://www.w3.org/ns/activitystreams', 'https://w3id.org/security/v1', + ['vcard' => 'http://www.w3.org/2006/vcard/ns#', + 'diaspora' => 'https://diasporafoundation.org/ns/', + 'manuallyApprovesFollowers' => 'as:manuallyApprovesFollowers', + 'sensitive' => 'as:sensitive', 'Hashtag' => 'as:Hashtag']]; + const ACCOUNT_TYPES = ['Person', 'Organization', 'Service', 'Group', 'Application']; + const CONTENT_TYPES = ['Note', 'Article', 'Video', 'Image']; + const ACTIVITY_TYPES = ['Like', 'Dislike', 'Accept', 'Reject', 'TentativeAccept']; + /** + * @brief Checks if the web request is done for the AP protocol + * + * @return is it AP? + */ + public static function isRequest() + { + return stristr(defaults($_SERVER, 'HTTP_ACCEPT', ''), 'application/activity+json') || + stristr(defaults($_SERVER, 'HTTP_ACCEPT', ''), 'application/ld+json'); + } - public static function transmit($data, $target, $uid) + /** + * @brief collects the lost of followers of the given owner + * + * @param array $owner Owner array + * @param integer $page Page number + * + * @return array of owners + */ + public static function getFollowers($owner, $page = null) { - $owner = User::getOwnerDataById($uid); + $condition = ['rel' => [Contact::FOLLOWER, Contact::FRIEND], 'network' => Protocol::NATIVE_SUPPORT, 'uid' => $owner['uid'], + 'self' => false, 'hidden' => false, 'archive' => false, 'pending' => false]; + $count = DBA::count('contact', $condition); - if (!$owner) { - return; + $data = ['@context' => self::CONTEXT]; + $data['id'] = System::baseUrl() . '/followers/' . $owner['nickname']; + $data['type'] = 'OrderedCollection'; + $data['totalItems'] = $count; + + // When we hide our friends we will only show the pure number but don't allow more. + $profile = Profile::getByUID($owner['uid']); + if (!empty($profile['hide-friends'])) { + return $data; } - $content = json_encode($data); + if (empty($page)) { + $data['first'] = System::baseUrl() . '/followers/' . $owner['nickname'] . '?page=1'; + } else { + $list = []; - $host = parse_url($target, PHP_URL_HOST); - $path = parse_url($target, PHP_URL_PATH); - $date = date('r'); + $contacts = DBA::select('contact', ['url'], $condition, ['limit' => [($page - 1) * 100, 100]]); + while ($contact = DBA::fetch($contacts)) { + $list[] = $contact['url']; + } - $headers = ['Host: ' . $host, 'Date: ' . $date]; + if (!empty($list)) { + $data['next'] = System::baseUrl() . '/followers/' . $owner['nickname'] . '?page=' . ($page + 1); + } - $signed_data = "(request-target): post " . $path . "\nhost: " . $host . "\ndate: " . $date; + $data['partOf'] = System::baseUrl() . '/followers/' . $owner['nickname']; - $signature = base64_encode(Crypto::rsaSign($signed_data, $owner['uprvkey'], 'sha256')); + $data['orderedItems'] = $list; + } - $headers[] = 'Signature: keyId="' . $owner['url'] . '#main-key' . '",headers="(request-target) host date",signature="' . $signature . '"'; - $headers[] = 'Content-Type: application/activity+json'; + return $data; + } - Network::post($target, $content, $headers); - $return_code = BaseObject::getApp()->get_curl_code(); + /** + * @brief Create list of following contacts + * + * @param array $owner Owner array + * @param integer $page Page numbe + * + * @return array of following contacts + */ + public static function getFollowing($owner, $page = null) + { + $condition = ['rel' => [Contact::SHARING, Contact::FRIEND], 'network' => Protocol::NATIVE_SUPPORT, 'uid' => $owner['uid'], + 'self' => false, 'hidden' => false, 'archive' => false, 'pending' => false]; + $count = DBA::count('contact', $condition); + + $data = ['@context' => self::CONTEXT]; + $data['id'] = System::baseUrl() . '/following/' . $owner['nickname']; + $data['type'] = 'OrderedCollection'; + $data['totalItems'] = $count; + + // When we hide our friends we will only show the pure number but don't allow more. + $profile = Profile::getByUID($owner['uid']); + if (!empty($profile['hide-friends'])) { + return $data; + } - logger('Transmit to ' . $target . ' returned ' . $return_code); + if (empty($page)) { + $data['first'] = System::baseUrl() . '/following/' . $owner['nickname'] . '?page=1'; + } else { + $list = []; + + $contacts = DBA::select('contact', ['url'], $condition, ['limit' => [($page - 1) * 100, 100]]); + while ($contact = DBA::fetch($contacts)) { + $list[] = $contact['url']; + } + + if (!empty($list)) { + $data['next'] = System::baseUrl() . '/following/' . $owner['nickname'] . '?page=' . ($page + 1); + } + + $data['partOf'] = System::baseUrl() . '/following/' . $owner['nickname']; + + $data['orderedItems'] = $list; + } + + return $data; + } + + /** + * @brief Public posts for the given owner + * + * @param array $owner Owner array + * @param integer $page Page numbe + * + * @return array of posts + */ + public static function getOutbox($owner, $page = null) + { + $public_contact = Contact::getIdForURL($owner['url'], 0, true); + + $condition = ['uid' => $owner['uid'], 'contact-id' => $owner['id'], 'author-id' => $public_contact, + 'wall' => true, 'private' => false, 'gravity' => [GRAVITY_PARENT, GRAVITY_COMMENT], + 'deleted' => false, 'visible' => true]; + $count = DBA::count('item', $condition); + + $data = ['@context' => self::CONTEXT]; + $data['id'] = System::baseUrl() . '/outbox/' . $owner['nickname']; + $data['type'] = 'OrderedCollection'; + $data['totalItems'] = $count; + + if (empty($page)) { + $data['first'] = System::baseUrl() . '/outbox/' . $owner['nickname'] . '?page=1'; + } else { + $list = []; + + $condition['parent-network'] = Protocol::NATIVE_SUPPORT; + + $items = Item::select(['id'], $condition, ['limit' => [($page - 1) * 20, 20], 'order' => ['created' => true]]); + while ($item = Item::fetch($items)) { + $object = self::createObjectFromItemID($item['id']); + unset($object['@context']); + $list[] = $object; + } + + if (!empty($list)) { + $data['next'] = System::baseUrl() . '/outbox/' . $owner['nickname'] . '?page=' . ($page + 1); + } + + $data['partOf'] = System::baseUrl() . '/outbox/' . $owner['nickname']; + + $data['orderedItems'] = $list; + } + + return $data; } /** * Return the ActivityPub profile of the given user * * @param integer $uid User ID - * @return array + * @return profile array */ public static function profile($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']; + $fields = ['guid', 'nickname', 'pubkey', 'account-type', 'page-flags']; $user = DBA::selectFirst('user', $fields, $condition); if (!DBA::isResult($user)) { return []; @@ -114,24 +262,21 @@ class ActivityPub return []; } - $data = ['@context' => ['https://www.w3.org/ns/activitystreams', 'https://w3id.org/security/v1', - ['uuid' => 'http://schema.org/identifier', 'sensitive' => 'as:sensitive', - 'vcard' => 'http://www.w3.org/2006/vcard/ns#']]]; - + $data = ['@context' => self::CONTEXT]; $data['id'] = $contact['url']; - $data['uuid'] = $user['guid']; - $data['type'] = $accounttype[$user['account-type']]; + $data['diaspora:guid'] = $user['guid']; + $data['type'] = self::ACCOUNT_TYPES[$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' => 'Home', 'vcard:country-name' => $profile['country-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'] = false; + $data['manuallyApprovesFollowers'] = in_array($user['page-flags'], [Contact::PAGE_NORMAL, Contact::PAGE_PRVGROUP]); $data['publicKey'] = ['id' => $contact['url'] . '#main-key', 'owner' => $contact['url'], 'publicKeyPem' => $user['pubkey']]; @@ -143,388 +288,658 @@ class ActivityPub return $data; } - public static function createActivityFromItem($item_id) + /** + * @brief Returns an array with permissions of a given item array + * + * @param array $item + * + * @return array with permissions + */ + private static function fetchPermissionBlockFromConversation($item) { - $item = Item::selectFirst([], ['id' => $item_id]); + if (empty($item['thr-parent'])) { + return []; + } - $data = ['@context' => ['https://www.w3.org/ns/activitystreams', 'https://w3id.org/security/v1', - ['Emoji' => 'toot:Emoji', 'Hashtag' => 'as:Hashtag', 'atomUri' => 'ostatus:atomUri', - 'conversation' => 'ostatus:conversation', 'inReplyToAtomUri' => 'ostatus:inReplyToAtomUri', - 'ostatus' => 'http://ostatus.org#', 'sensitive' => 'as:sensitive', - 'toot' => 'http://joinmastodon.org/ns#']]]; + $condition = ['item-uri' => $item['thr-parent'], 'protocol' => Conversation::PARCEL_ACTIVITYPUB]; + $conversation = DBA::selectFirst('conversation', ['source'], $condition); + if (!DBA::isResult($conversation)) { + return []; + } - $data['type'] = 'Create'; - $data['id'] = $item['uri']; - $data['actor'] = $item['author-link']; - $data['to'] = 'https://www.w3.org/ns/activitystreams#Public'; - $data['object'] = self::createNote($item); - return $data; - } + $activity = json_decode($conversation['source'], true); - public static function createNote($item) - { - $data = []; - $data['type'] = 'Note'; - $data['id'] = $item['uri']; + $actor = JsonLD::fetchElement($activity, 'actor', 'id'); + $profile = APContact::getByURL($actor); - if ($item['uri'] != $item['thr-parent']) { - $data['inReplyTo'] = $item['thr-parent']; - } + $item_profile = APContact::getByURL($item['author-link']); + $exclude[] = $item['author-link']; - $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 = $item['parent-uri']; + if ($item['gravity'] == GRAVITY_PARENT) { + $exclude[] = $item['owner-link']; } - $data['context'] = $data['conversation'] = $conversation_uri; - $data['actor'] = $item['author-link']; - $data['to'] = []; - if (!$item['private']) { - $data['to'][] = 'https://www.w3.org/ns/activitystreams#Public'; + $permissions['to'][] = $actor; + + foreach (['to', 'cc', 'bto', 'bcc'] as $element) { + if (empty($activity[$element])) { + continue; + } + if (is_string($activity[$element])) { + $activity[$element] = [$activity[$element]]; + } + + foreach ($activity[$element] as $receiver) { + if ($receiver == $profile['followers'] && !empty($item_profile['followers'])) { + $receiver = $item_profile['followers']; + } + if (!in_array($receiver, $exclude)) { + $permissions[$element][] = $receiver; + } + } } - $data['published'] = DateTimeFormat::utc($item["created"]."+00:00", DateTimeFormat::ATOM); - $data['updated'] = DateTimeFormat::utc($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 - //$data['tag'] = []; /// @ToDo - //$data['attachment'] = []; // @ToDo - return $data; + return $permissions; } - public static function transmitActivity($activity, $target, $uid) + /** + * @brief Creates an array of permissions from an item thread + * + * @param array $item + * + * @return permission array + */ + public static function createPermissionBlockForItem($item) { - $profile = Probe::uri($target, Protocol::ACTIVITYPUB); + $data = ['to' => [], 'cc' => []]; - $owner = User::getOwnerDataById($uid); + $data = array_merge($data, self::fetchPermissionBlockFromConversation($item)); - $data = ['@context' => 'https://www.w3.org/ns/activitystreams', - 'id' => System::baseUrl() . '/activity/' . System::createGUID(), - 'type' => $activity, - 'actor' => $owner['url'], - 'object' => $profile['url']]; + $actor_profile = APContact::getByURL($item['author-link']); - logger('Sending activity ' . $activity . ' to ' . $target . ' for user ' . $uid, LOGGER_DEBUG); - return self::transmit($data, $profile['notify'], $uid); - } + $terms = Term::tagArrayFromItemId($item['id'], TERM_MENTION); - public static function transmitContactAccept($target, $id, $uid) - { - $profile = Probe::uri($target, Protocol::ACTIVITYPUB); + $contacts[$item['author-link']] = $item['author-link']; - $owner = User::getOwnerDataById($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' => $owner['url']]]; + if (!$item['private']) { + $data['to'][] = self::PUBLIC_COLLECTION; + if (!empty($actor_profile['followers'])) { + $data['cc'][] = $actor_profile['followers']; + } - logger('Sending accept to ' . $target . ' for user ' . $uid . ' with id ' . $id, LOGGER_DEBUG); - return self::transmit($data, $profile['notify'], $uid); - } + foreach ($terms as $term) { + $profile = APContact::getByURL($term['url'], false); + if (!empty($profile) && empty($contacts[$profile['url']])) { + $data['cc'][] = $profile['url']; + $contacts[$profile['url']] = $profile['url']; + } + } + } else { + $receiver_list = Item::enumeratePermissions($item); - public static function transmitContactReject($target, $id, $uid) - { - $profile = Probe::uri($target, Protocol::ACTIVITYPUB); + $mentioned = []; - $owner = User::getOwnerDataById($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' => $owner['url']]]; + foreach ($terms as $term) { + $cid = Contact::getIdForURL($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']; + $contacts[$contact['url']] = $contact['url']; + } + } - logger('Sending reject to ' . $target . ' for user ' . $uid . ' with id ' . $id, LOGGER_DEBUG); - return self::transmit($data, $profile['notify'], $uid); - } + foreach ($receiver_list as $receiver) { + $contact = DBA::selectFirst('contact', ['url'], ['id' => $receiver, 'network' => Protocol::ACTIVITYPUB]); + if (empty($contacts[$contact['url']])) { + $data['cc'][] = $contact['url']; + $contacts[$contact['url']] = $contact['url']; + } + } + } - public static function transmitContactUndo($target, $uid) - { - $profile = Probe::uri($target, Protocol::ACTIVITYPUB); + $parents = Item::select(['id', 'author-link', 'owner-link', 'gravity'], ['parent' => $item['parent']]); + while ($parent = Item::fetch($parents)) { + // Don't include data from future posts + if ($parent['id'] >= $item['id']) { + continue; + } - $id = System::baseUrl() . '/activity/' . System::createGUID(); + $profile = APContact::getByURL($parent['author-link'], false); + if (!empty($profile) && empty($contacts[$profile['url']])) { + $data['cc'][] = $profile['url']; + $contacts[$profile['url']] = $profile['url']; + } - $owner = User::getOwnerDataById($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' => $profile['url']]]; + if ($item['gravity'] != GRAVITY_PARENT) { + continue; + } - logger('Sending undo to ' . $target . ' for user ' . $uid . ' with id ' . $id, LOGGER_DEBUG); - return self::transmit($data, $profile['notify'], $uid); + $profile = APContact::getByURL($parent['owner-link'], false); + if (!empty($profile) && empty($contacts[$profile['url']])) { + $data['cc'][] = $profile['url']; + $contacts[$profile['url']] = $profile['url']; + } + } + DBA::close($parents); + + if (empty($data['to'])) { + $data['to'] = $data['cc']; + $data['cc'] = []; + } + + return $data; } /** - * Fetches ActivityPub content from the given url + * @brief Fetches a list of inboxes of followers of a given user * - * @param string $url content url - * @return array + * @param integer $uid User ID + * + * @return array of follower inboxes */ - public static function fetchContent($url) + public static function fetchTargetInboxesforUser($uid) { - $ret = Network::curl($url, false, $redirects, ['accept_content' => 'application/activity+json']); + $inboxes = []; - if (!$ret['success'] || empty($ret['body'])) { - return; + $condition = ['uid' => $uid, 'network' => Protocol::ACTIVITYPUB, 'archive' => false, 'pending' => false]; + + if (!empty($uid)) { + $condition['rel'] = [Contact::FOLLOWER, Contact::FRIEND]; } - return json_decode($ret['body'], true); + $contacts = DBA::select('contact', ['notify', 'batch'], $condition); + while ($contact = DBA::fetch($contacts)) { + $contact = defaults($contact, 'batch', $contact['notify']); + $inboxes[$contact] = $contact; + } + DBA::close($contacts); + + return $inboxes; } /** - * Resolves the profile url from the address by using webfinger + * @brief Fetches an array of inboxes for the given item and user * - * @param string $addr profile address (user@domain.tld) - * @return string url + * @param array $item + * @param integer $uid User ID + * + * @return array with inboxes */ - private static function addrToUrl($addr) + public static function fetchTargetInboxes($item, $uid) { - $addr_parts = explode('@', $addr); - if (count($addr_parts) != 2) { - return false; + $permissions = self::createPermissionBlockForItem($item); + if (empty($permissions)) { + return []; } - $webfinger = 'https://' . $addr_parts[1] . '/.well-known/webfinger?resource=acct:' . urlencode($addr); + $inboxes = []; - $ret = Network::curl($webfinger, false, $redirects, ['accept_content' => 'application/jrd+json,application/json']); - if (!$ret['success'] || empty($ret['body'])) { - return false; + if ($item['gravity'] == GRAVITY_ACTIVITY) { + $item_profile = APContact::getByURL($item['author-link']); + } else { + $item_profile = APContact::getByURL($item['owner-link']); } - $data = json_decode($ret['body'], true); + foreach (['to', 'cc', 'bto', 'bcc'] as $element) { + if (empty($permissions[$element])) { + continue; + } - if (empty($data['links'])) { - return false; + foreach ($permissions[$element] as $receiver) { + if ($receiver == $item_profile['followers']) { + $inboxes = self::fetchTargetInboxesforUser($uid); + } else { + $profile = APContact::getByURL($receiver); + if (!empty($profile)) { + $target = defaults($profile, 'sharedinbox', $profile['inbox']); + $inboxes[$target] = $target; + } + } + } } - foreach ($data['links'] as $link) { - if (empty($link['href']) || empty($link['rel']) || empty($link['type'])) { - continue; - } + return $inboxes; + } - if (($link['rel'] == 'self') && ($link['type'] == 'application/activity+json')) { - return $link['href']; + /** + * @brief Returns the activity type of a given item + * + * @param array $item + * + * @return activity type + */ + public static function getTypeOfItem($item) + { + if ($item['verb'] == ACTIVITY_POST) { + if ($item['created'] == $item['edited']) { + $type = 'Create'; + } else { + $type = 'Update'; } + } elseif ($item['verb'] == ACTIVITY_LIKE) { + $type = 'Like'; + } elseif ($item['verb'] == ACTIVITY_DISLIKE) { + $type = 'Dislike'; + } elseif ($item['verb'] == ACTIVITY_ATTEND) { + $type = 'Accept'; + } elseif ($item['verb'] == ACTIVITY_ATTENDNO) { + $type = 'Reject'; + } elseif ($item['verb'] == ACTIVITY_ATTENDMAYBE) { + $type = 'TentativeAccept'; + } else { + $type = ''; } - return false; + return $type; } - public static function verifySignature($content, $http_headers) + /** + * @brief Creates an activity array for a given item id + * + * @param integer $item_id + * @param boolean $object_mode Is the activity item is used inside another object? + * + * @return array of activity + */ + public static function createActivityFromItem($item_id, $object_mode = false) { - $object = json_decode($content, true); + $item = Item::selectFirst([], ['id' => $item_id, 'parent-network' => Protocol::NATIVE_SUPPORT]); - if (empty($object)) { + if (!DBA::isResult($item)) { return false; } - $actor = self::processElement($object, 'actor', 'id'); + $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; + } + } - $headers = []; - $headers['(request-target)'] = strtolower($http_headers['REQUEST_METHOD']) . ' ' . $http_headers['REQUEST_URI']; + $type = self::getTypeOfItem($item); - // First take every header - foreach ($http_headers as $k => $v) { - $field = str_replace('_', '-', strtolower($k)); - $headers[$field] = $v; - } + if (!$object_mode) { + $data = ['@context' => self::CONTEXT]; - // Now add every http header - foreach ($http_headers as $k => $v) { - if (strpos($k, 'HTTP_') === 0) { - $field = str_replace('_', '-', strtolower(substr($k, 5))); - $headers[$field] = $v; + if ($item['deleted'] && ($item['gravity'] == GRAVITY_ACTIVITY)) { + $type = 'Undo'; + } elseif ($item['deleted']) { + $type = 'Delete'; } + } else { + $data = []; } - $sig_block = ActivityPub::parseSigHeader($http_headers['HTTP_SIGNATURE']); + $data['id'] = $item['uri'] . '#' . $type; + $data['type'] = $type; + $data['actor'] = $item['author-link']; - if (empty($sig_block) || empty($sig_block['headers']) || empty($sig_block['keyId'])) { - return false; + $data['published'] = DateTimeFormat::utc($item["created"]."+00:00", DateTimeFormat::ATOM); + + if ($item["created"] != $item["edited"]) { + $data['updated'] = DateTimeFormat::utc($item["edited"]."+00:00", DateTimeFormat::ATOM); } - $signed_data = ''; - foreach ($sig_block['headers'] as $h) { - if (array_key_exists($h, $headers)) { - $signed_data .= $h . ': ' . $headers[$h] . "\n"; - } + $data['context'] = self::fetchContextURLForItem($item); + + $data = array_merge($data, ActivityPub::createPermissionBlockForItem($item)); + + if (in_array($data['type'], ['Create', 'Update', 'Announce', 'Delete'])) { + $data['object'] = self::createNote($item); + } elseif ($data['type'] == 'Undo') { + $data['object'] = self::createActivityFromItem($item_id, true); + } else { + $data['object'] = $item['thr-parent']; } - $signed_data = rtrim($signed_data, "\n"); - if (empty($signed_data)) { + $owner = User::getOwnerDataById($item['uid']); + + if (!$object_mode) { + return LDSignature::sign($data, $owner); + } else { + return $data; + } + } + + /** + * @brief Creates an object array for a given item id + * + * @param integer $item_id + * + * @return object array + */ + public static function createObjectFromItemID($item_id) + { + $item = Item::selectFirst([], ['id' => $item_id, 'parent-network' => Protocol::NATIVE_SUPPORT]); + + if (!DBA::isResult($item)) { return false; } - $algorithm = null; + $data = ['@context' => self::CONTEXT]; + $data = array_merge($data, self::createNote($item)); + + return $data; + } - if ($sig_block['algorithm'] === 'rsa-sha256') { - $algorithm = 'sha256'; + /** + * @brief Returns a tag array for a given item array + * + * @param array $item + * + * @return array of tags + */ + private static function createTagList($item) + { + $tags = []; + + $terms = Term::tagArrayFromItemId($item['id'], TERM_MENTION); + foreach ($terms as $term) { + $contact = Contact::getDetailsByURL($term['url']); + if (!empty($contact['addr'])) { + $mention = '@' . $contact['addr']; + } else { + $mention = '@' . $term['url']; + } + + $tags[] = ['type' => 'Mention', 'href' => $term['url'], 'name' => $mention]; } + return $tags; + } - if ($sig_block['algorithm'] === 'rsa-sha512') { - $algorithm = 'sha512'; + /** + * @brief Fetches the "context" value for a givem item array from the "conversation" table + * + * @param array $item + * + * @return string with context url + */ + private static function fetchContextURLForItem($item) + { + $conversation = DBA::selectFirst('conversation', ['conversation-href', 'conversation-uri'], ['item-uri' => $item['parent-uri']]); + if (DBA::isResult($conversation) && !empty($conversation['conversation-href'])) { + $context_uri = $conversation['conversation-href']; + } elseif (DBA::isResult($conversation) && !empty($conversation['conversation-uri'])) { + $context_uri = $conversation['conversation-uri']; + } else { + $context_uri = str_replace('/objects/', '/context/', $item['parent-uri']); } + return $context_uri; + } - if (empty($algorithm)) { - return false; + /** + * @brief Creates a note/article object array + * + * @param array $item + * + * @return object array + */ + private static function createNote($item) + { + if (!empty($item['title'])) { + $type = 'Article'; + } else { + $type = 'Note'; } - $key = self::fetchKey($sig_block['keyId'], $actor); + if ($item['deleted']) { + $type = 'Tombstone'; + } - if (empty($key)) { - return false; + $data = []; + $data['id'] = $item['uri']; + $data['type'] = $type; + + if ($item['deleted']) { + return $data; } - if (!Crypto::rsaVerify($signed_data, $sig_block['signature'], $key, $algorithm)) { - return false; + $data['summary'] = null; // Ignore by now + + if ($item['uri'] != $item['thr-parent']) { + $data['inReplyTo'] = $item['thr-parent']; + } else { + $data['inReplyTo'] = null; } - // Check the digest if it was 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'; - } + $data['diaspora:guid'] = $item['guid']; + $data['published'] = DateTimeFormat::utc($item["created"]."+00:00", DateTimeFormat::ATOM); - /// @todo add all hashes from the rfc + if ($item["created"] != $item["edited"]) { + $data['updated'] = DateTimeFormat::utc($item["edited"]."+00:00", DateTimeFormat::ATOM); + } - if (!empty($hashalg) && base64_encode(hash($hashalg, $content, true)) != $digest[1]) { - return false; - } + $data['url'] = $item['plink']; + $data['attributedTo'] = $item['author-link']; + $data['actor'] = $item['author-link']; + $data['sensitive'] = false; // - Query NSFW + $data['context'] = self::fetchContextURLForItem($item); + + if (!empty($item['title'])) { + $data['name'] = BBCode::convert($item['title'], false, 7); } - // Check the content-length if it was part of the signed data - if (in_array('content-length', $sig_block['headers'])) { - if (strlen($content) != $headers['content-length']) { - return false; - } + $data['content'] = BBCode::convert($item['body'], false, 7); + $data['source'] = ['content' => $item['body'], 'mediaType' => "text/bbcode"]; + + if (!empty($item['signed_text']) && ($item['uri'] != $item['thr-parent'])) { + $data['diaspora:comment'] = $item['signed_text']; } - return true; + $data['attachment'] = []; // @ToDo + $data['tag'] = self::createTagList($item); + $data = array_merge($data, ActivityPub::createPermissionBlockForItem($item)); + return $data; } - private static function fetchKey($id, $actor) + /** + * @brief Transmits a profile deletion to a given inbox + * + * @param integer $uid User ID + * @param string $inbox Target inbox + */ + public static function transmitProfileDeletion($uid, $inbox) { - $url = (strpos($id, '#') ? substr($id, 0, strpos($id, '#')) : $id); - - $profile = Probe::uri($url, Protocol::ACTIVITYPUB); - if (!empty($profile)) { - return $profile['pubkey']; - } elseif ($url != $actor) { - $profile = Probe::uri($actor, Protocol::ACTIVITYPUB); - if (!empty($profile)) { - return $profile['pubkey']; - } - } + $owner = User::getOwnerDataById($uid); + $profile = APContact::getByURL($owner['url']); - return false; + $data = ['@context' => 'https://www.w3.org/ns/activitystreams', + 'id' => System::baseUrl() . '/activity/' . System::createGUID(), + 'type' => 'Delete', + 'actor' => $owner['url'], + 'object' => self::profile($uid), + 'published' => DateTimeFormat::utcNow(DateTimeFormat::ATOM), + 'to' => [self::PUBLIC_COLLECTION], + 'cc' => []]; + + $signed = LDSignature::sign($data, $owner); + + logger('Deliver profile deletion for user ' . $uid . ' to ' . $inbox .' via ActivityPub', LOGGER_DEBUG); + HTTPSignature::transmit($signed, $inbox, $uid); } /** - * @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 + * @brief Transmits a profile change to a given inbox + * + * @param integer $uid User ID + * @param string $inbox Target inbox */ - private static function parseSigHeader($header) + public static function transmitProfileUpdate($uid, $inbox) { - $ret = []; - $matches = []; + $owner = User::getOwnerDataById($uid); + $profile = APContact::getByURL($owner['url']); - if (preg_match('/keyId="(.*?)"/ism',$header,$matches)) { - $ret['keyId'] = $matches[1]; - } + $data = ['@context' => 'https://www.w3.org/ns/activitystreams', + 'id' => System::baseUrl() . '/activity/' . System::createGUID(), + 'type' => 'Update', + 'actor' => $owner['url'], + 'object' => self::profile($uid), + 'published' => DateTimeFormat::utcNow(DateTimeFormat::ATOM), + 'to' => [$profile['followers']], + 'cc' => []]; - if (preg_match('/algorithm="(.*?)"/ism',$header,$matches)) { - $ret['algorithm'] = $matches[1]; - } + $signed = LDSignature::sign($data, $owner); - if (preg_match('/headers="(.*?)"/ism',$header,$matches)) { - $ret['headers'] = explode(' ', $matches[1]); - } + logger('Deliver profile update for user ' . $uid . ' to ' . $inbox .' via ActivityPub', LOGGER_DEBUG); + HTTPSignature::transmit($signed, $inbox, $uid); + } - if (preg_match('/signature="(.*?)"/ism',$header,$matches)) { - $ret['signature'] = base64_decode(preg_replace('/\s+/','',$matches[1])); - } + /** + * @brief Transmits a given activity to a target + * + * @param array $activity + * @param string $target Target profile + * @param integer $uid User ID + */ + public static function transmitActivity($activity, $target, $uid) + { + $profile = APContact::getByURL($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 $ret; + $signed = LDSignature::sign($data, $owner); + HTTPSignature::transmit($signed, $profile['inbox'], $uid); } /** - * Fetches a profile from the given url + * @brief Transmit a message that the contact request had been accepted * - * @param string $url profile url + * @param string $target Target profile + * @param $id + * @param integer $uid User ID + */ + public static function transmitContactAccept($target, $id, $uid) + { + $profile = APContact::getByURL($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); + + $signed = LDSignature::sign($data, $owner); + HTTPSignature::transmit($signed, $profile['inbox'], $uid); + } + + /** + * @brief + * + * @param string $target Target profile + * @param $id + * @param integer $uid User ID + */ + public static function transmitContactReject($target, $id, $uid) + { + $profile = APContact::getByURL($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); + + $signed = LDSignature::sign($data, $owner); + HTTPSignature::transmit($signed, $profile['inbox'], $uid); + } + + /** + * @brief + * + * @param string $target Target profile + * @param integer $uid User ID + */ + public static function transmitContactUndo($target, $uid) + { + $profile = APContact::getByURL($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); + + $signed = LDSignature::sign($data, $owner); + HTTPSignature::transmit($signed, $profile['inbox'], $uid); + } + + /** + * Fetches ActivityPub content from the given url + * + * @param string $url content url * @return array */ - public static function fetchProfile($url) + public static function fetchContent($url) { - if (empty(parse_url($url, PHP_URL_SCHEME))) { - $url = self::addrToUrl($url); - if (empty($url)) { - return false; - } + $ret = Network::curl($url, false, $redirects, ['accept_content' => 'application/activity+json, application/ld+json']); + if (!$ret['success'] || empty($ret['body'])) { + return false; } - $data = self::fetchContent($url); + return json_decode($ret['body'], true); + } - if (empty($data) || empty($data['id']) || empty($data['inbox'])) { + /** + * 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) + { + $apcontact = APContact::getByURL($url, true); + if (empty($apcontact)) { return false; } $profile = ['network' => Protocol::ACTIVITYPUB]; - $profile['nick'] = $data['preferredUsername']; - $profile['name'] = defaults($data, 'name', $profile['nick']); - $profile['guid'] = defaults($data, 'uuid', null); - $profile['url'] = $data['id']; - - $parts = parse_url($profile['url']); - unset($parts['scheme']); - unset($parts['path']); - $profile['addr'] = $profile['nick'] . '@' . str_replace('//', '', Network::unparseURL($parts)); - $profile['alias'] = self::processElement($data, 'url', 'href'); - $profile['photo'] = self::processElement($data, 'icon', 'url'); + $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'] - $profile['about'] = defaults($data, 'summary', ''); - $profile['batch'] = self::processElement($data, 'endpoints', 'sharedInbox'); - $profile['notify'] = $data['inbox']; - $profile['poll'] = $data['outbox']; - $profile['pubkey'] = self::processElement($data, 'publicKey', 'publicKeyPem'); - - // Check if the address is resolvable - if (self::addrToUrl($profile['addr']) == $profile['url']) { - $parts = parse_url($profile['url']); - unset($parts['path']); - $profile['baseurl'] = Network::unparseURL($parts); - } else { - unset($profile['addr']); - } - - if ($profile['url'] == $profile['alias']) { - unset($profile['alias']); - } + $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 => $content) { @@ -533,51 +948,72 @@ class ActivityPub } } -/* - // To-Do - unset($data['type']); - unset($data['manuallyApprovesFollowers']); - - // Unhandled - unset($data['@context']); - unset($data['tag']); - unset($data['attachment']); - unset($data['image']); - unset($data['nomadicLocations']); - unset($data['signature']); - unset($data['following']); - unset($data['followers']); - unset($data['featured']); - unset($data['movedTo']); - unset($data['liked']); - unset($data['sharedInbox']); // Misskey - unset($data['isCat']); // Misskey - unset($data['kroeg:blocks']); // Kroeg - unset($data['updated']); // Kroeg -*/ return $profile; } + /** + * @brief + * + * @param $body + * @param $header + * @param integer $uid User ID + */ public static function processInbox($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); + $http_signer = HTTPSignature::getSigner($body, $header); + if (empty($http_signer)) { + logger('Invalid HTTP signature, message will be discarded.', LOGGER_DEBUG); return; + } else { + logger('HTTP signature is signed by ' . $http_signer, LOGGER_DEBUG); } $activity = json_decode($body, true); - if (!is_array($activity)) { + $actor = JsonLD::fetchElement($activity, 'actor', 'id'); + logger('Message for user ' . $uid . ' is from actor ' . $actor, LOGGER_DEBUG); + + if (empty($activity)) { logger('Invalid body.', LOGGER_DEBUG); return; } - self::processActivity($activity, $body, $uid); + if (LDSignature::isSigned($activity)) { + $ld_signer = LDSignature::getSigner($activity); + if (empty($ld_signer)) { + logger('Invalid JSON-LD signature from ' . $actor, LOGGER_DEBUG); + } + if (!empty($ld_signer && ($actor == $http_signer))) { + logger('The HTTP and the JSON-LD signature belong to ' . $ld_signer, LOGGER_DEBUG); + $trust_source = true; + } elseif (!empty($ld_signer)) { + logger('JSON-LD signature is signed by ' . $ld_signer, LOGGER_DEBUG); + $trust_source = true; + } elseif ($actor == $http_signer) { + logger('Bad JSON-LD signature, but HTTP signer fits the actor.', LOGGER_DEBUG); + $trust_source = true; + } else { + logger('Invalid JSON-LD signature and the HTTP signer is different.', LOGGER_DEBUG); + $trust_source = false; + } + } elseif ($actor == $http_signer) { + logger('Trusting post without JSON-LD signature, The actor fits the HTTP signer.', LOGGER_DEBUG); + $trust_source = true; + } else { + logger('No JSON-LD signature, different actor.', LOGGER_DEBUG); + $trust_source = false; + } + + self::processActivity($activity, $body, $uid, $trust_source); } - public static function fetchOutbox($url) + /** + * @brief + * + * @param $url + * @param integer $uid User ID + */ + public static function fetchOutbox($url, $uid) { $data = self::fetchContent($url); if (empty($data)) { @@ -589,147 +1025,176 @@ class ActivityPub } elseif (!empty($data['first']['orderedItems'])) { $items = $data['first']['orderedItems']; } elseif (!empty($data['first'])) { - self::fetchOutbox($data['first']); + self::fetchOutbox($data['first'], $uid); return; } else { $items = []; } foreach ($items as $activity) { - self::processActivity($activity); + self::processActivity($activity, '', $uid, true); } } - function processActivity($activity, $body = '', $uid = null) + /** + * @brief + * + * @param array $activity + * @param integer $uid User ID + * @param $trust_source + * + * @return + */ + private static function prepareObjectData($activity, $uid, &$trust_source) { - 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; - - } - - $actor = self::processElement($activity, 'actor', 'id'); + $actor = JsonLD::fetchElement($activity, 'actor', 'id'); if (empty($actor)) { - logger('Empty actor - 2', LOGGER_DEBUG); - return; - } - - if (is_string($activity['object'])) { - $object_url = $activity['object']; - } elseif (!empty($activity['object']['id'])) { - $object_url = $activity['object']['id']; - } else { - logger('No object found', LOGGER_DEBUG); - return; + logger('Empty actor', LOGGER_DEBUG); + return []; } - // ---------------------------------- -/* - // unhandled - unset($activity['@context']); - unset($activity['id']); - - // Non standard - unset($activity['title']); - unset($activity['atomUri']); - unset($activity['context_id']); - unset($activity['statusnetConversationId']); - - // To-Do? - unset($activity['context']); - unset($activity['location']); - unset($activity['signature']); -*/ // Fetch all receivers from to, cc, bto and bcc - $receivers = self::getReceivers($activity); + $receivers = self::getReceivers($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); - $additional = [$owner['url'] => $uid]; + $additional = ['uid:' . $uid => $uid]; $receivers = array_merge($receivers, $additional); } logger('Receivers: ' . json_encode($receivers), LOGGER_DEBUG); - logger('Processing activity: ' . $activity['type'], 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', 'Update', 'Announce'])) { - $item = self::fetchObject($object_url, $activity['object']); - if (empty($item)) { + 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; + 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; + $object_data['object_type'] = ''; // Since we don't fetch the object, we don't know the type } else { - if (in_array($activity['type'], ['Accept'])) { - $item['object'] = self::processElement($activity, 'object', 'actor', 'type', 'Follow'); - } elseif (in_array($activity['type'], ['Undo'])) { - $item['object'] = self::processElement($activity, 'object', 'object', 'type', 'Follow'); - } else { - $item['uri'] = $activity['id']; - $item['author'] = $activity['actor']; - $item['updated'] = $item['published'] = $activity['published']; - $item['uuid'] = ''; - $item['name'] = $activity['type']; - $item['summary'] = ''; - $item['content'] = ''; - $item['location'] = ''; - $item['tags'] = []; - $item['sensitive'] = false; - $item['service'] = ''; - $item['attachments'] = []; - $item['conversation'] = ''; - $item['object'] = $object_url; - } - $item['id'] = $activity['id']; - $item['receiver'] = []; - $item['type'] = $activity['type']; + $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 integer $uid User ID + * @param $trust_source + */ + private static function processActivity($activity, $body = '', $uid = null, $trust_source = false) + { + if (empty($activity['type'])) { + logger('Empty type', LOGGER_DEBUG); + return; } - $item = self::addActivityFields($item, $activity); + if (empty($activity['object'])) { + logger('Empty object', LOGGER_DEBUG); + return; + } - $item['owner'] = $actor; + if (empty($activity['actor'])) { + logger('Empty actor', LOGGER_DEBUG); + return; - $item['receiver'] = array_merge($item['receiver'], $receivers); + } + + // $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 'Update': case 'Announce': - self::createItem($item, $body); + self::createItem($object_data, $body); break; case 'Like': - self::likeItem($item, $body); + self::likeItem($object_data, $body); break; case 'Dislike': + self::dislikeItem($object_data, $body); + break; + + case 'Update': + if (in_array($object_data['object_type'], self::CONTENT_TYPES)) { + /// @todo + } elseif (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) { + self::updatePerson($object_data, $body); + } break; case 'Delete': + if ($object_data['object_type'] == 'Tombstone') { + self::deleteItem($object_data, $body); + } elseif (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) { + self::deletePerson($object_data, $body); + } break; case 'Follow': - self::followUser($item); + self::followUser($object_data); break; case 'Accept': - self::acceptFollowUser($item); + if ($object_data['object_type'] == 'Follow') { + self::acceptFollowUser($object_data); + } + break; + + case 'Reject': + if ($object_data['object_type'] == 'Follow') { + self::rejectFollowUser($object_data); + } break; case 'Undo': - self::undoFollowUser($item); + if ($object_data['object_type'] == 'Follow') { + self::undoFollowUser($object_data); + } elseif (in_array($object_data['object_type'], self::ACTIVITY_TYPES)) { + self::undoActivity($object_data); + } break; default: @@ -738,24 +1203,76 @@ class ActivityPub } } - private static function getReceivers($activity) + /** + * @brief + * + * @param array $activity + * @param $actor + * + * @return + */ + private static function getReceivers($activity, $actor) { $receivers = []; - $elements = ['to', 'cc', 'bto', 'bcc']; - foreach ($elements as $element) { + // 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)) { + $profile = APContact::getByURL($actor); + $followers = defaults($profile, 'followers', ''); + + logger('Actor: ' . $actor . ' - Followers: ' . $followers, LOGGER_DEBUG); + } else { + logger('Empty actor', LOGGER_DEBUG); + $followers = ''; + } + + foreach (['to', 'cc', 'bto', 'bcc'] as $element) { if (empty($activity[$element])) { continue; } - // The receiver can be an arror or a string + // The receiver can be an array or a string if (is_string($activity[$element])) { $activity[$element] = [$activity[$element]]; } foreach ($activity[$element] as $receiver) { - if ($receiver == self::PUBLIC) { - $receivers[$receiver] = 0; + if ($receiver == self::PUBLIC_COLLECTION) { + $receivers['uid:0'] = 0; + } + + if (($receiver == self::PUBLIC_COLLECTION) && !empty($actor)) { + // This will most likely catch all OStatus connections to Mastodon + $condition = ['alias' => [$actor, normalise_link($actor)], 'rel' => [Contact::SHARING, Contact::FRIEND] + , 'archive' => false, 'pending' => false]; + $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_COLLECTION]) && !empty($actor)) { + $condition = ['nurl' => normalise_link($actor), 'rel' => [Contact::SHARING, Contact::FRIEND], + 'network' => Protocol::ACTIVITYPUB, 'archive' => false, 'pending' => false]; + $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)]; @@ -763,241 +1280,232 @@ class ActivityPub if (!DBA::isResult($contact)) { continue; } - $receivers[$receiver] = $contact['uid']; + $receivers['uid:' . $contact['uid']] = $contact['uid']; } } + + self::switchContacts($receivers, $actor); + return $receivers; } - private static function addActivityFields($item, $activity) + /** + * @brief + * + * @param $cid + * @param integer $uid User ID + * @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($item['published'])) { - $item['published'] = $activity['published']; + if (!empty($activity['published']) && empty($object_data['published'])) { + $object_data['published'] = $activity['published']; } - if (!empty($activity['updated']) && empty($item['updated'])) { - $item['updated'] = $activity['updated']; + if (!empty($activity['updated']) && empty($object_data['updated'])) { + $object_data['updated'] = $activity['updated']; } - if (!empty($activity['inReplyTo']) && empty($item['parent-uri'])) { - $item['parent-uri'] = self::processElement($activity, 'inReplyTo', 'id'); + if (!empty($activity['inReplyTo']) && empty($object_data['parent-uri'])) { + $object_data['parent-uri'] = JsonLD::fetchElement($activity, 'inReplyTo', 'id'); } if (!empty($activity['instrument'])) { - $item['service'] = self::processElement($activity, 'instrument', 'name', 'type', 'Service'); + $object_data['service'] = JsonLD::fetchElement($activity, 'instrument', 'name', 'type', 'Service'); } - return $item; + return $object_data; } - private static function fetchObject($object_url, $object = []) + /** + * @brief + * + * @param $object_id + * @param $object + * @param $trust_source + * + * @return + */ + private static function fetchObject($object_id, $object = [], $trust_source = false) { - $data = self::fetchContent($object_url); - if (empty($data)) { - $data = $object; + if (!$trust_source || is_string($object)) { + $data = self::fetchContent($object_id); if (empty($data)) { - logger('Empty content', LOGGER_DEBUG); - return false; - } elseif (is_string($data)) { - logger('No object array provided.', LOGGER_DEBUG); - $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', LOGGER_DEBUG); - $data = self::createNote($item); + logger('Empty content for ' . $object_id . ', check if content is available locally.', LOGGER_DEBUG); + $data = $object_id; } else { - logger('Using provided object', LOGGER_DEBUG); + 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; - } else { - $type = $data['type']; - logger('Type ' . $type, LOGGER_DEBUG); } - if (in_array($type, ['Note', 'Article', 'Video'])) { - $common = self::processCommonData($data); + if (in_array($data['type'], self::CONTENT_TYPES)) { + return self::processObject($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: ' . $data['type'], LOGGER_DEBUG); - break; + if ($data['type'] == 'Announce') { + if (empty($data['object'])) { + return false; + } + return self::fetchObject($data['object']); } + + logger('Unhandled object type: ' . $data['type'], LOGGER_DEBUG); } - private static function processCommonData(&$object) + /** + * @brief + * + * @param $object + * + * @return + */ + private static function processObject($object) { - if (empty($object['id']) || empty($object['attributedTo'])) { + if (empty($object['id'])) { return false; } - $item = []; - $item['type'] = $object['type']; - $item['uri'] = $object['id']; + $object_data = []; + $object_data['object_type'] = $object['type']; + $object_data['id'] = $object['id']; if (!empty($object['inReplyTo'])) { - $item['reply-to-uri'] = self::processElement($object, 'inReplyTo', 'id'); + $object_data['reply-to-id'] = JsonLD::fetchElement($object, 'inReplyTo', 'id'); } else { - $item['reply-to-uri'] = $item['uri']; + $object_data['reply-to-id'] = $object_data['id']; } - $item['published'] = defaults($object, 'published', null); - $item['updated'] = defaults($object, 'updated', $item['published']); + $object_data['published'] = defaults($object, 'published', null); + $object_data['updated'] = defaults($object, 'updated', $object_data['published']); - if (empty($item['published']) && !empty($item['updated'])) { - $item['published'] = $item['updated']; + if (empty($object_data['published']) && !empty($object_data['updated'])) { + $object_data['published'] = $object_data['updated']; } - $item['uuid'] = defaults($object, 'uuid', null); - $item['owner'] = $item['author'] = self::processElement($object, 'attributedTo', 'id'); - $item['context'] = defaults($object, 'context', null); - $item['conversation'] = defaults($object, 'conversation', null); - $item['sensitive'] = defaults($object, 'sensitive', null); - $item['name'] = defaults($object, 'title', null); - $item['name'] = defaults($object, 'name', $item['name']); - $item['summary'] = defaults($object, 'summary', null); - $item['content'] = defaults($object, 'content', null); - $item['source'] = defaults($object, 'source', null); - $item['location'] = self::processElement($object, 'location', 'name', 'type', 'Place'); - $item['attachments'] = defaults($object, 'attachment', null); - $item['tags'] = defaults($object, 'tag', null); - $item['service'] = self::processElement($object, 'instrument', 'name', 'type', 'Service'); - $item['alternate-url'] = self::processElement($object, 'url', 'href'); - $item['receiver'] = self::getReceivers($object); - -/* - // To-Do - unset($object['source']); + $actor = JsonLD::fetchElement($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, $object_data['owner']); + + // Common object data: // Unhandled - unset($object['@context']); - unset($object['type']); - unset($object['actor']); - unset($object['signature']); - unset($object['mediaType']); - unset($object['duration']); - unset($object['replies']); - unset($object['icon']); - - // Also missing: - audience, preview, endTime, startTime, generator, image -*/ - return $item; - } + // @context, type, actor, signature, mediaType, duration, replies, icon - private static function processNote($object) - { - $item = []; + // Also missing: (Defined in the standard, but currently unused) + // audience, preview, endTime, startTime, generator, image -/* - // To-Do? - unset($object['emoji']); - unset($object['atomUri']); - unset($object['inReplyToAtomUri']); + // Data in Notes: // Unhandled - unset($object['contentMap']); - unset($object['announcement_count']); - unset($object['announcements']); - unset($object['context_id']); - unset($object['likes']); - unset($object['like_count']); - unset($object['inReplyToStatusId']); - unset($object['shares']); - unset($object['quoteUrl']); - unset($object['statusnetConversationId']); -*/ - return $item; - } - - private static function processArticle($object) - { - $item = []; + // contentMap, announcement_count, announcements, context_id, likes, like_count + // inReplyToStatusId, shares, quoteUrl, statusnetConversationId - return $item; - } + // Data in video: - private static function processVideo($object) - { - $item = []; -/* // To-Do? - unset($object['category']); - unset($object['licence']); - unset($object['language']); - unset($object['commentsEnabled']); + // category, licence, language, commentsEnabled // Unhandled - unset($object['views']); - unset($object['waitTranscoding']); - unset($object['state']); - unset($object['support']); - unset($object['subtitleLanguage']); - unset($object['likes']); - unset($object['dislikes']); - unset($object['shares']); - unset($object['comments']); -*/ - return $item; - } - - private static function processElement($array, $element, $key, $type = null, $type_value = null) - { - if (empty($array)) { - return false; - } - - if (empty($array[$element])) { - return false; - } - - if (is_string($array[$element])) { - return $array[$element]; - } - - if (is_null($type_value)) { - if (!empty($array[$element][$key])) { - return $array[$element][$key]; - } - - if (!empty($array[$element][0][$key])) { - return $array[$element][0][$key]; - } - - return false; - } - - if (!empty($array[$element][$key]) && !empty($array[$element][$type]) && ($array[$element][$type] == $type_value)) { - return $array[$element][$key]; - } - - /// @todo Add array search + // views, waitTranscoding, state, support, subtitleLanguage + // likes, dislikes, shares, comments - return false; + return $object_data; } + /** + * @brief Converts mentions from Pleroma into the Friendica format + * + * @param string $body + * + * @return converted body + */ private static function convertMentions($body) { $URLSearchString = "^\[\]"; @@ -1006,6 +1514,14 @@ class ActivityPub 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)) { @@ -1028,6 +1544,14 @@ class ActivityPub return $tag_text; } + /** + * @brief + * + * @param $attachments + * @param array $item + * + * @return item array + */ private static function constructAttachList($attachments, $item) { if (empty($attachments)) { @@ -1054,13 +1578,19 @@ class ActivityPub return $item; } + /** + * @brief + * + * @param array $activity + * @param $body + */ private static function createItem($activity, $body) { $item = []; $item['verb'] = ACTIVITY_POST; - $item['parent-uri'] = $activity['reply-to-uri']; + $item['parent-uri'] = $activity['reply-to-id']; - if ($activity['reply-to-uri'] == $activity['uri']) { + if ($activity['reply-to-id'] == $activity['id']) { $item['gravity'] = GRAVITY_PARENT; $item['object-type'] = ACTIVITY_OBJ_NOTE; } else { @@ -1068,9 +1598,20 @@ class ActivityPub $item['object-type'] = ACTIVITY_OBJ_COMMENT; } + if (($activity['id'] != $activity['reply-to-id']) && !Item::exists(['uri' => $activity['reply-to-id']])) { + logger('Parent ' . $activity['reply-to-id'] . ' not found. Try to refetch it.'); + self::fetchMissingActivity($activity['reply-to-id'], $activity); + } + self::postItem($activity, $item, $body); } + /** + * @brief + * + * @param array $activity + * @param $body + */ private static function likeItem($activity, $body) { $item = []; @@ -1082,18 +1623,61 @@ class ActivityPub self::postItem($activity, $item, $body); } + /** + * @brief Delete items + * + * @param array $activity + * @param $body + */ + private static function deleteItem($activity) + { + $owner = Contact::getIdForURL($activity['owner']); + $object = JsonLD::fetchElement($activity, 'object', 'id'); + logger('Deleting item ' . $object . ' from ' . $owner, LOGGER_DEBUG); + Item::delete(['uri' => $object, 'owner-id' => $owner]); + } + + /** + * @brief + * + * @param array $activity + * @param $body + */ + private static function dislikeItem($activity, $body) + { + $item = []; + $item['verb'] = ACTIVITY_DISLIKE; + $item['parent-uri'] = $activity['object']; + $item['gravity'] = GRAVITY_ACTIVITY; + $item['object-type'] = ACTIVITY_OBJ_NOTE; + + self::postItem($activity, $item, $body); + } + + /** + * @brief + * + * @param array $activity + * @param array $item + * @param $body + */ private static function postItem($activity, $item, $body) { /// @todo What to do with $activity['context']? + if (($item['gravity'] != GRAVITY_PARENT) && !Item::exists(['uri' => $item['parent-uri']])) { + logger('Parent ' . $item['parent-uri'] . ' not found, message will be discarded.', LOGGER_DEBUG); + return; + } + $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['uri'] = $activity['id']; $item['created'] = $activity['published']; $item['edited'] = $activity['updated']; - $item['guid'] = $activity['uuid']; + $item['guid'] = $activity['diaspora:guid']; $item['title'] = HTML::toBBCode($activity['name']); $item['content-warning'] = HTML::toBBCode($activity['summary']); $item['body'] = self::convertMentions(HTML::toBBCode($activity['content'])); @@ -1104,13 +1688,14 @@ class ActivityPub $item = self::constructAttachList($activity['attachments'], $item); - $source = self::processElement($activity, 'source', 'content', 'mediaType', 'text/bbcode'); + $source = JsonLD::fetchElement($activity, 'source', 'content', 'mediaType', 'text/bbcode'); if (!empty($source)) { $item['body'] = $source; } $item['protocol'] = Conversation::PARCEL_ACTIVITYPUB; $item['source'] = $body; + $item['conversation-href'] = $activity['context']; $item['conversation-uri'] = $activity['conversation']; foreach ($activity['receiver'] as $receiver) { @@ -1123,19 +1708,55 @@ class ActivityPub $item_id = Item::insert($item); logger('Storing for user ' . $item['uid'] . ': ' . $item_id); - if (!empty($item_id) && ($item['uid'] == 0)) { - Item::distribute($item_id); - } } } + /** + * @brief + * + * @param $url + * @param $child + */ + private static function fetchMissingActivity($url, $child) + { + if (Config::get('system', 'ostatus_full_threads')) { + return; + } + + $object = ActivityPub::fetchContent($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.'); + } + + /** + * @brief perform a "follow" request + * + * @param array $activity + */ private static function followUser($activity) { - if (empty($activity['receiver'][$activity['object']])) { + $actor = JsonLD::fetchElement($activity, 'object', 'id'); + $uid = User::getIdForURL($actor); + if (empty($uid)) { return; } - $uid = $activity['receiver'][$activity['object']]; $owner = User::getOwnerDataById($uid); $cid = Contact::getIdForURL($activity['owner'], $uid); @@ -1163,13 +1784,60 @@ class ActivityPub logger('Follow user ' . $uid . ' from contact ' . $cid . ' with id ' . $activity['id']); } + /** + * @brief Update the given profile + * + * @param array $activity + */ + private static function updatePerson($activity) + { + if (empty($activity['object']['id'])) { + return; + } + + logger('Updating profile for ' . $activity['object']['id'], LOGGER_DEBUG); + APContact::getByURL($activity['object']['id'], true); + } + + /** + * @brief Delete the given profile + * + * @param array $activity + */ + private static function deletePerson($activity) + { + if (empty($activity['object']['id']) || empty($activity['object']['actor'])) { + logger('Empty object id or actor.', LOGGER_DEBUG); + return; + } + + if ($activity['object']['id'] != $activity['object']['actor']) { + logger('Object id does not match actor.', LOGGER_DEBUG); + return; + } + + $contacts = DBA::select('contact', ['id'], ['nurl' => normalise_link($activity['object']['id'])]); + while ($contact = DBA::fetch($contacts)) { + Contact::remove($contact["id"]); + } + DBA::close($contacts); + + logger('Deleted contact ' . $activity['object']['id'], LOGGER_DEBUG); + } + + /** + * @brief Accept a follow request + * + * @param array $activity + */ private static function acceptFollowUser($activity) { - if (empty($activity['receiver'][$activity['object']])) { + $actor = JsonLD::fetchElement($activity, 'object', 'actor'); + $uid = User::getIdForURL($actor); + if (empty($uid)) { return; } - $uid = $activity['receiver'][$activity['object']]; $owner = User::getOwnerDataById($uid); $cid = Contact::getIdForURL($activity['owner'], $uid); @@ -1190,13 +1858,73 @@ class ActivityPub logger('Accept contact request from contact ' . $cid . ' for user ' . $uid, LOGGER_DEBUG); } + /** + * @brief Reject a follow request + * + * @param array $activity + */ + private static function rejectFollowUser($activity) + { + $actor = JsonLD::fetchElement($activity, 'object', 'actor'); + $uid = User::getIdForURL($actor); + 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; + } + + if (DBA::exists('contact', ['id' => $cid, 'rel' => Contact::SHARING, 'pending' => true])) { + Contact::remove($cid); + logger('Rejected contact request from contact ' . $cid . ' for user ' . $uid . ' - contact had been removed.', LOGGER_DEBUG); + } else { + logger('Rejected contact request from contact ' . $cid . ' for user ' . $uid . '.', LOGGER_DEBUG); + } + } + + /** + * @brief Undo activity like "like" or "dislike" + * + * @param array $activity + */ + private static function undoActivity($activity) + { + $activity_url = JsonLD::fetchElement($activity, 'object', 'id'); + if (empty($activity_url)) { + return; + } + + $actor = JsonLD::fetchElement($activity, 'object', 'actor'); + if (empty($actor)) { + return; + } + + $author_id = Contact::getIdForURL($actor); + if (empty($author_id)) { + return; + } + + Item::delete(['uri' => $activity_url, 'author-id' => $author_id, 'gravity' => GRAVITY_ACTIVITY]); + } + + /** + * @brief Activity to remove a follower + * + * @param array $activity + */ private static function undoFollowUser($activity) { - if (empty($activity['receiver'][$activity['object']])) { + $object = JsonLD::fetchElement($activity, 'object', 'object'); + $uid = User::getIdForURL($object); + if (empty($uid)) { return; } - $uid = $activity['receiver'][$activity['object']]; $owner = User::getOwnerDataById($uid); $cid = Contact::getIdForURL($activity['owner'], $uid);