--- /dev/null
+<?php
+/**
+ * @file src/Protocol/ActivityPub.php
+ */
+namespace Friendica\Protocol;
+
+use Friendica\Database\DBA;
+use Friendica\Core\System;
+use Friendica\BaseObject;
+use Friendica\Util\Network;
+use Friendica\Util\HTTPSignature;
+use Friendica\Core\Protocol;
+use Friendica\Model\Conversation;
+use Friendica\Model\Contact;
+use Friendica\Model\Item;
+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;
+
+/**
+ * @brief ActivityPub Protocol class
+ * The ActivityPub Protocol is a message exchange protocol defined by the W3C.
+ * https://www.w3.org/TR/activitypub/
+ * https://www.w3.org/TR/activitystreams-core/
+ * https://www.w3.org/TR/activitystreams-vocabulary/
+ *
+ * https://blog.joinmastodon.org/2018/06/how-to-implement-a-basic-activitypub-server/
+ * https://blog.joinmastodon.org/2018/07/how-to-make-friends-and-verify-requests/
+ *
+ * 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.
+ *
+ *
+ * To-do:
+ *
+ * Receiver:
+ * - Activities: Dislike, Update, Delete
+ * - Object Types: Person, Tombstome
+ *
+ * Transmitter:
+ * - Activities: Like, Dislike, Update, Delete
+ * - Object Tyoes: Article, Announce, Person, Tombstone
+ *
+ * General:
+ * - Message distribution
+ * - Endpoints: Outbox, Object, Follower, Following
+ */
+class ActivityPub
+{
+ const PUBLIC = 'https://www.w3.org/ns/activitystreams#Public';
+
+ public static function transmit($data, $target, $uid)
+ {
+ $owner = User::getOwnerDataById($uid);
+
+ if (!$owner) {
+ return;
+ }
+
+ $content = json_encode($data);
+
+ $host = parse_url($target, PHP_URL_HOST);
+ $path = parse_url($target, PHP_URL_PATH);
+ $date = date('r');
+
+ $headers = ['Host: ' . $host, 'Date: ' . $date];
+
+ $signed_data = "(request-target): post " . $path . "\nhost: " . $host . "\ndate: " . $date;
+
+ $signature = base64_encode(Crypto::rsaSign($signed_data, $owner['uprvkey'], 'sha256'));
+
+ $headers[] = 'Signature: keyId="' . $owner['url'] . '#main-key' . '",headers="(request-target) host date",signature="' . $signature . '"';
+ $headers[] = 'Content-Type: application/activity+json';
+
+ Network::post($target, $content, $headers);
+ $return_code = BaseObject::getApp()->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'];
+ $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',
+ ['uuid' => 'http://schema.org/identifier', 'sensitive' => 'as:sensitive',
+ 'vcard' => 'http://www.w3.org/2006/vcard/ns#']]];
+
+ $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' => '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['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 $data;
+ }
+
+ public static function createActivityFromItem($item_id)
+ {
+ $item = Item::selectFirst([], ['id' => $item_id]);
+
+ $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#']]];
+
+ $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 $data;
+ }
+
+ public static function createNote($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'];
+ $data['to'] = [];
+ if (!$item['private']) {
+ $data['to'][] = 'https://www.w3.org/ns/activitystreams#Public';
+ }
+ $data['published'] = DateTimeFormat::utc($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 $data;
+ }
+
+ public static function transmitActivity($activity, $target, $uid)
+ {
+ $profile = Probe::uri($target, Protocol::ACTIVITYPUB);
+
+ $owner = User::getOwnerDataById($uid);
+
+ $data = ['@context' => 'https://www.w3.org/ns/activitystreams',
+ 'id' => System::baseUrl() . '/activity/' . System::createGUID(),
+ 'type' => $activity,
+ 'actor' => $owner['url'],
+ 'object' => $profile['url']];
+
+ logger('Sending activity ' . $activity . ' to ' . $target . ' for user ' . $uid, LOGGER_DEBUG);
+ return self::transmit($data, $profile['notify'], $uid);
+ }
+
+ public static function transmitContactAccept($target, $id, $uid)
+ {
+ $profile = Probe::uri($target, Protocol::ACTIVITYPUB);
+
+ $owner = User::getOwnerDataById($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']]];
+
+ logger('Sending accept to ' . $target . ' for user ' . $uid . ' with id ' . $id, LOGGER_DEBUG);
+ return self::transmit($data, $profile['notify'], $uid);
+ }
+
+ public static function transmitContactUndo($target, $id, $uid)
+ {
+ $profile = Probe::uri($target, Protocol::ACTIVITYPUB);
+
+ if (empty($id)) {
+ $id = System::baseUrl() . '/activity/' . System::createGUID();
+ }
+
+ $owner = User::getOwnerDataById($uid);
+ $data = ['@context' => 'https://www.w3.org/ns/activitystreams',
+ 'id' => System::baseUrl() . '/activity/' . System::createGUID(),
+ 'type' => 'Undo',
+ 'actor' => $owner['url'],
+ 'object' => ['id' => $id, 'type' => 'Follow',
+ 'actor' => $owner['url'],
+ 'object' => $profile['url']]];
+
+ logger('Sending undo to ' . $target . ' for user ' . $uid . ' with id ' . $id, LOGGER_DEBUG);
+ return self::transmit($data, $profile['notify'], $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, $redirects, ['accept_content' => 'application/activity+json']);
+
+ if (!$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;
+ }
+
+ $actor = self::processElement($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 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') {
+ $hashalg = 'sha512';
+ }
+
+ /// @todo add all hashes from the rfc
+
+ if (!empty($hashalg) && base64_encode(hash($hashalg, $content, true)) != $digest[1]) {
+ return false;
+ }
+ }
+
+ // Check the content-length if it was part of the signed data
+ if (in_array('content-length', $sig_block['headers'])) {
+ if (strlen($content) != $headers['content-length']) {
+ return false;
+ }
+ }
+
+ return true;
+
+ }
+
+ private static function fetchKey($id, $actor)
+ {
+ $url = (strpos($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'];
+ }
+ }
+
+ 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;
+ }
+
+ /**
+ * Fetches a profile from the given url
+ *
+ * @param string $url profile url
+ * @return array
+ */
+ public static function fetchProfile($url)
+ {
+ 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;
+ }
+
+ $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['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']);
+ }
+
+ // Remove all "null" fields
+ foreach ($profile as $field => $content) {
+ if (is_null($content)) {
+ unset($profile[$field]);
+ }
+ }
+
+/*
+ // 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 $profile;
+ }
+
+ public static function processInbox($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);
+ }
+ }
+
+ 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;
+
+ }
+
+ $actor = self::processElement($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 = $activity['object']['id'];
+ } else {
+ logger('No object found', LOGGER_DEBUG);
+ return;
+ }
+
+ // ----------------------------------
+/*
+ // unhandled
+ unset($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);
+
+ // 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];
+ $receivers = array_merge($receivers, $additional);
+ }
+
+ logger('Receivers: ' . json_encode($receivers), LOGGER_DEBUG);
+
+ logger('Processing activity: ' . $activity['type'], LOGGER_DEBUG);
+
+ // Fetch the content only on activities where this matters
+ if (in_array($activity['type'], ['Create', 'Update', 'Announce'])) {
+ $item = self::fetchObject($object_url, $activity['object']);
+ if (empty($item)) {
+ logger("Object data couldn't be processed", LOGGER_DEBUG);
+ return;
+ }
+ } 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['object'] = $object_url;
+ }
+ $item['id'] = $activity['id'];
+ $item['receiver'] = [];
+ $item['type'] = $activity['type'];
+ }
+
+ $item = self::addActivityFields($item, $activity);
+
+ $item['owner'] = $actor;
+
+ $item['receiver'] = array_merge($item['receiver'], $receivers);
+
+ switch ($activity['type']) {
+ case 'Create':
+ case 'Update':
+ case 'Announce':
+ self::createItem($item, $body);
+ break;
+
+ case 'Like':
+ self::likeItem($item, $body);
+ break;
+
+ case 'Dislike':
+ break;
+
+ case 'Delete':
+ break;
+
+ case 'Follow':
+ self::followUser($item);
+ break;
+
+ case 'Accept':
+ self::acceptFollowUser($item);
+ break;
+
+ case 'Undo':
+ self::undoFollowUser($item);
+ break;
+
+ default:
+ logger('Unknown activity: ' . $activity['type'], LOGGER_DEBUG);
+ break;
+ }
+ }
+
+ private static function getReceivers($activity)
+ {
+ $receivers = [];
+
+ $elements = ['to', 'cc', 'bto', 'bcc'];
+ foreach ($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) {
+ $receivers[$receiver] = 0;
+ }
+
+ $condition = ['self' => true, 'nurl' => normalise_link($receiver)];
+ $contact = DBA::selectFirst('contact', ['uid'], $condition);
+ if (!DBA::isResult($contact)) {
+ continue;
+ }
+ $receivers[$receiver] = $contact['uid'];
+ }
+ }
+ return $receivers;
+ }
+
+ private static function addActivityFields($item, $activity)
+ {
+ if (!empty($activity['published']) && empty($item['published'])) {
+ $item['published'] = $activity['published'];
+ }
+
+ if (!empty($activity['updated']) && empty($item['updated'])) {
+ $item['updated'] = $activity['updated'];
+ }
+
+ if (!empty($activity['inReplyTo']) && empty($item['parent-uri'])) {
+ $item['parent-uri'] = self::processElement($activity, 'inReplyTo', 'id');
+ }
+
+ if (!empty($activity['instrument'])) {
+ $item['service'] = self::processElement($activity, 'instrument', 'name', 'type', 'Service');
+ }
+ return $item;
+ }
+
+ private static function fetchObject($object_url, $object = [])
+ {
+ $data = self::fetchContent($object_url);
+ if (empty($data)) {
+ $data = $object;
+ if (empty($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);
+ } else {
+ logger('Using provided object', LOGGER_DEBUG);
+ }
+ }
+
+ 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($object['id']) || empty($object['attributedTo'])) {
+ return false;
+ }
+
+ $item = [];
+ $item['type'] = $object['type'];
+ $item['uri'] = $object['id'];
+
+ if (!empty($object['inReplyTo'])) {
+ $item['reply-to-uri'] = self::processElement($object, 'inReplyTo', 'id');
+ } else {
+ $item['reply-to-uri'] = $item['uri'];
+ }
+
+ $item['published'] = defaults($object, 'published', null);
+ $item['updated'] = defaults($object, 'updated', $item['published']);
+
+ if (empty($item['published']) && !empty($item['updated'])) {
+ $item['published'] = $item['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($object['source']);
+
+ // Unhandled
+ unset($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 $item;
+ }
+
+ private static function processNote($object)
+ {
+ $item = [];
+
+/*
+ // To-Do?
+ unset($object['emoji']);
+ unset($object['atomUri']);
+ unset($object['inReplyToAtomUri']);
+
+ // 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 = [];
+
+ return $item;
+ }
+
+ private static function processVideo($object)
+ {
+ $item = [];
+/*
+ // To-Do?
+ unset($object['category']);
+ unset($object['licence']);
+ unset($object['language']);
+ unset($object['commentsEnabled']);
+
+ // Unhandled
+ unset($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][$key];
+ }
+
+ /// @todo Add array search
+
+ return false;
+ }
+
+ private static function convertMentions($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 .= ',';
+ }
+
+ $tag_text .= substr($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;
+ $item['object-type'] = ACTIVITY_OBJ_COMMENT;
+ }
+
+ self::postItem($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);
+
+ $source = self::processElement($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'] . ': ' . $item_id);
+ if (!empty($item_id) && ($item['uid'] == 0)) {
+ Item::distribute($item_id);
+ }
+ }
+ }
+
+ private static function followUser($activity)
+ {
+ if (empty($activity['receiver'][$activity['object']])) {
+ return;
+ }
+
+ $uid = $activity['receiver'][$activity['object']];
+ $owner = User::getOwnerDataById($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)
+ {
+ if (empty($activity['receiver'][$activity['object']])) {
+ return;
+ }
+
+ $uid = $activity['receiver'][$activity['object']];
+ $owner = User::getOwnerDataById($uid);
+
+ $cid = Contact::getIdForURL($activity['owner'], $uid);
+ if (empty($cid)) {
+ logger('No contact found for ' . $activity['owner'], LOGGER_DEBUG);
+ return;
+ }
+
+ $fields = ['pending' => false];
+ $condition = ['id' => $cid, 'pending' => true];
+ DBA::update('comtact', $fields, $condition);
+ logger('Accept contact request from contact ' . $cid . ' for user ' . $uid, LOGGER_DEBUG);
+ }
+
+ private static function undoFollowUser($activity)
+ {
+ if (empty($activity['receiver'][$activity['object']])) {
+ return;
+ }
+
+ $uid = $activity['receiver'][$activity['object']];
+ $owner = User::getOwnerDataById($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);
+ }
+}
projects / friendica.git / commitdiff