864 lines
27 KiB
PHP
864 lines
27 KiB
PHP
<?php
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/**
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* @file src/Protocol/ActivityPub/Receiver.php
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*/
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namespace Friendica\Protocol\ActivityPub;
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use Friendica\Database\DBA;
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use Friendica\Util\HTTPSignature;
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use Friendica\Core\Logger;
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use Friendica\Core\Protocol;
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use Friendica\Model\Contact;
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use Friendica\Model\APContact;
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use Friendica\Model\Item;
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use Friendica\Model\User;
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use Friendica\Util\JsonLD;
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use Friendica\Util\LDSignature;
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use Friendica\Protocol\ActivityPub;
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use Friendica\Model\Conversation;
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use Friendica\Util\DateTimeFormat;
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/**
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* @brief ActivityPub Receiver Protocol class
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*
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* To-Do:
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* - Undo Announce
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*
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* Check what this is meant to do:
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* - Add
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* - Block
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* - Flag
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* - Remove
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* - Undo Block
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*/
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class Receiver
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{
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const PUBLIC_COLLECTION = 'as:Public';
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const ACCOUNT_TYPES = ['as:Person', 'as:Organization', 'as:Service', 'as:Group', 'as:Application'];
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const CONTENT_TYPES = ['as:Note', 'as:Article', 'as:Video', 'as:Image', 'as:Event'];
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const ACTIVITY_TYPES = ['as:Like', 'as:Dislike', 'as:Accept', 'as:Reject', 'as:TentativeAccept'];
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/**
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* Checks if the web request is done for the AP protocol
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*
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* @return is it AP?
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*/
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public static function isRequest()
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{
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return stristr(defaults($_SERVER, 'HTTP_ACCEPT', ''), 'application/activity+json') ||
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stristr(defaults($_SERVER, 'HTTP_ACCEPT', ''), 'application/ld+json');
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}
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/**
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* Checks incoming message from the inbox
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*
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* @param $body
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* @param $header
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* @param integer $uid User ID
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*/
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public static function processInbox($body, $header, $uid)
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{
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$http_signer = HTTPSignature::getSigner($body, $header);
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if (empty($http_signer)) {
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Logger::log('Invalid HTTP signature, message will be discarded.', Logger::DEBUG);
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return;
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} else {
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Logger::log('HTTP signature is signed by ' . $http_signer, Logger::DEBUG);
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}
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$activity = json_decode($body, true);
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if (empty($activity)) {
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Logger::log('Invalid body.', Logger::DEBUG);
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return;
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}
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$ldactivity = JsonLD::compact($activity);
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$actor = JsonLD::fetchElement($ldactivity, 'as:actor');
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Logger::log('Message for user ' . $uid . ' is from actor ' . $actor, Logger::DEBUG);
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if (LDSignature::isSigned($activity)) {
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$ld_signer = LDSignature::getSigner($activity);
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if (empty($ld_signer)) {
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Logger::log('Invalid JSON-LD signature from ' . $actor, Logger::DEBUG);
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}
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if (!empty($ld_signer && ($actor == $http_signer))) {
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Logger::log('The HTTP and the JSON-LD signature belong to ' . $ld_signer, Logger::DEBUG);
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$trust_source = true;
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} elseif (!empty($ld_signer)) {
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Logger::log('JSON-LD signature is signed by ' . $ld_signer, Logger::DEBUG);
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$trust_source = true;
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} elseif ($actor == $http_signer) {
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Logger::log('Bad JSON-LD signature, but HTTP signer fits the actor.', Logger::DEBUG);
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$trust_source = true;
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} else {
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Logger::log('Invalid JSON-LD signature and the HTTP signer is different.', Logger::DEBUG);
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$trust_source = false;
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}
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} elseif ($actor == $http_signer) {
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Logger::log('Trusting post without JSON-LD signature, The actor fits the HTTP signer.', Logger::DEBUG);
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$trust_source = true;
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} else {
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Logger::log('No JSON-LD signature, different actor.', Logger::DEBUG);
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$trust_source = false;
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}
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self::processActivity($ldactivity, $body, $uid, $trust_source);
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}
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/**
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* Fetches the object type for a given object id
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*
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* @param array $activity
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* @param string $object_id Object ID of the the provided object
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* @param integer $uid User ID
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*
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* @return string with object type
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*/
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private static function fetchObjectType($activity, $object_id, $uid = 0)
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{
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if (!empty($activity['as:object'])) {
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$object_type = JsonLD::fetchElement($activity['as:object'], '@type');
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if (!empty($object_type)) {
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return $object_type;
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}
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}
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if (Item::exists(['uri' => $object_id, 'gravity' => [GRAVITY_PARENT, GRAVITY_COMMENT]])) {
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// We just assume "note" since it doesn't make a difference for the further processing
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return 'as:Note';
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}
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$profile = APContact::getByURL($object_id);
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if (!empty($profile['type'])) {
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return 'as:' . $profile['type'];
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}
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$data = ActivityPub::fetchContent($object_id, $uid);
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if (!empty($data)) {
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$object = JsonLD::compact($data);
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$type = JsonLD::fetchElement($object, '@type');
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if (!empty($type)) {
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return $type;
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}
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}
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return null;
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}
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/**
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* Prepare the object array
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*
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* @param array $activity
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* @param integer $uid User ID
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* @param $trust_source
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*
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* @return array with object data
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*/
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private static function prepareObjectData($activity, $uid, &$trust_source)
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{
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$actor = JsonLD::fetchElement($activity, 'as:actor');
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if (empty($actor)) {
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Logger::log('Empty actor', Logger::DEBUG);
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return [];
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}
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$type = JsonLD::fetchElement($activity, '@type');
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// Fetch all receivers from to, cc, bto and bcc
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$receivers = self::getReceivers($activity, $actor);
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// When it is a delivery to a personal inbox we add that user to the receivers
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if (!empty($uid)) {
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$additional = ['uid:' . $uid => $uid];
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$receivers = array_merge($receivers, $additional);
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} else {
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// We possibly need some user to fetch private content,
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// so we fetch the first out ot the list.
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$uid = self::getFirstUserFromReceivers($receivers);
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}
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Logger::log('Receivers: ' . $uid . ' - ' . json_encode($receivers), Logger::DEBUG);
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$object_id = JsonLD::fetchElement($activity, 'as:object');
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if (empty($object_id)) {
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Logger::log('No object found', Logger::DEBUG);
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return [];
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}
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$object_type = self::fetchObjectType($activity, $object_id, $uid);
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// Fetch the content only on activities where this matters
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if (in_array($type, ['as:Create', 'as:Update', 'as:Announce'])) {
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if ($type == 'as:Announce') {
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$trust_source = false;
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}
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$object_data = self::fetchObject($object_id, $activity['as:object'], $trust_source, $uid);
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if (empty($object_data)) {
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Logger::log("Object data couldn't be processed", Logger::DEBUG);
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return [];
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}
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// We had been able to retrieve the object data - so we can trust the source
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$trust_source = true;
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} elseif (in_array($type, ['as:Like', 'as:Dislike'])) {
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// Create a mostly empty array out of the activity data (instead of the object).
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// This way we later don't have to check for the existence of ech individual array element.
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$object_data = self::processObject($activity);
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$object_data['name'] = $type;
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$object_data['author'] = JsonLD::fetchElement($activity, 'as:actor');
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$object_data['object_id'] = $object_id;
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$object_data['object_type'] = ''; // Since we don't fetch the object, we don't know the type
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} else {
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$object_data = [];
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$object_data['id'] = JsonLD::fetchElement($activity, '@id');
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$object_data['object_id'] = JsonLD::fetchElement($activity, 'as:object');
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$object_data['object_actor'] = JsonLD::fetchElement($activity['as:object'], 'as:actor');
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$object_data['object_object'] = JsonLD::fetchElement($activity['as:object'], 'as:object');
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$object_data['object_type'] = JsonLD::fetchElement($activity['as:object'], '@type');
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// An Undo is done on the object of an object, so we need that type as well
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if ($type == 'as:Undo') {
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$object_data['object_object_type'] = self::fetchObjectType([], $object_data['object_object'], $uid);
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}
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}
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$object_data = self::addActivityFields($object_data, $activity);
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if (empty($object_data['object_type'])) {
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$object_data['object_type'] = $object_type;
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}
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$object_data['type'] = $type;
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$object_data['actor'] = $actor;
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$object_data['receiver'] = array_merge(defaults($object_data, 'receiver', []), $receivers);
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Logger::log('Processing ' . $object_data['type'] . ' ' . $object_data['object_type'] . ' ' . $object_data['id'], Logger::DEBUG);
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return $object_data;
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}
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/**
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* Fetches the first user id from the receiver array
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*
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* @param array $receivers Array with receivers
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* @return integer user id;
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*/
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public static function getFirstUserFromReceivers($receivers)
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{
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foreach ($receivers as $receiver) {
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if (!empty($receiver)) {
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return $receiver;
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}
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}
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return 0;
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}
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/**
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* Store the unprocessed data into the conversation table
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* This has to be done outside the regular function,
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* since we store everything - not only item posts.
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*
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* @param array $activity Array with activity data
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* @param string $body The raw message
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*/
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private static function storeConversation($activity, $body)
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{
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if (empty($body) || empty($activity['id'])) {
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return;
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}
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$conversation = [
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'protocol' => Conversation::PARCEL_ACTIVITYPUB,
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'item-uri' => $activity['id'],
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'reply-to-uri' => defaults($activity, 'reply-to-id', ''),
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'conversation-href' => defaults($activity, 'context', ''),
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'conversation-uri' => defaults($activity, 'conversation', ''),
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'source' => $body,
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'received' => DateTimeFormat::utcNow()];
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DBA::insert('conversation', $conversation, true);
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}
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/**
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* Processes the activity object
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*
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* @param array $activity Array with activity data
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* @param string $body
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* @param integer $uid User ID
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* @param boolean $trust_source Do we trust the source?
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*/
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public static function processActivity($activity, $body = '', $uid = null, $trust_source = false)
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{
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$type = JsonLD::fetchElement($activity, '@type');
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if (!$type) {
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Logger::log('Empty type', Logger::DEBUG);
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return;
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}
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if (!JsonLD::fetchElement($activity, 'as:object')) {
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Logger::log('Empty object', Logger::DEBUG);
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return;
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}
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if (!JsonLD::fetchElement($activity, 'as:actor')) {
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Logger::log('Empty actor', Logger::DEBUG);
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return;
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}
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// $trust_source is called by reference and is set to true if the content was retrieved successfully
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$object_data = self::prepareObjectData($activity, $uid, $trust_source);
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if (empty($object_data)) {
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Logger::log('No object data found', Logger::DEBUG);
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return;
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}
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if (!$trust_source) {
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Logger::log('No trust for activity type "' . $type . '", so we quit now.', Logger::DEBUG);
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return;
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}
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self::storeConversation($object_data, $body);
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// Internal flag for thread completion. See Processor.php
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if (!empty($activity['thread-completion'])) {
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$object_data['thread-completion'] = $activity['thread-completion'];
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}
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switch ($type) {
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case 'as:Create':
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case 'as:Announce':
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if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
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ActivityPub\Processor::createItem($object_data);
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}
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break;
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case 'as:Like':
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if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
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ActivityPub\Processor::createActivity($object_data, ACTIVITY_LIKE);
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}
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break;
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case 'as:Dislike':
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if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
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ActivityPub\Processor::createActivity($object_data, ACTIVITY_DISLIKE);
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}
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break;
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case 'as:TentativeAccept':
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if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
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ActivityPub\Processor::createActivity($object_data, ACTIVITY_ATTENDMAYBE);
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}
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break;
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case 'as:Update':
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if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
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ActivityPub\Processor::updateItem($object_data);
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} elseif (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
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ActivityPub\Processor::updatePerson($object_data, $body);
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}
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break;
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case 'as:Delete':
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if ($object_data['object_type'] == 'as:Tombstone') {
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ActivityPub\Processor::deleteItem($object_data, $body);
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} elseif (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
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ActivityPub\Processor::deletePerson($object_data, $body);
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}
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break;
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case 'as:Follow':
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if (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
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ActivityPub\Processor::followUser($object_data);
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}
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break;
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case 'as:Accept':
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if ($object_data['object_type'] == 'as:Follow') {
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ActivityPub\Processor::acceptFollowUser($object_data);
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} elseif (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
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ActivityPub\Processor::createActivity($object_data, ACTIVITY_ATTEND);
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}
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break;
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case 'as:Reject':
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if ($object_data['object_type'] == 'as:Follow') {
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ActivityPub\Processor::rejectFollowUser($object_data);
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} elseif (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
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ActivityPub\Processor::createActivity($object_data, ACTIVITY_ATTENDNO);
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}
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break;
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case 'as:Undo':
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if (($object_data['object_type'] == 'as:Follow') &&
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in_array($object_data['object_object_type'], self::ACCOUNT_TYPES)) {
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ActivityPub\Processor::undoFollowUser($object_data);
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} elseif (($object_data['object_type'] == 'as:Accept') &&
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in_array($object_data['object_object_type'], self::ACCOUNT_TYPES)) {
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ActivityPub\Processor::rejectFollowUser($object_data);
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} elseif (in_array($object_data['object_type'], self::ACTIVITY_TYPES) &&
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in_array($object_data['object_object_type'], self::CONTENT_TYPES)) {
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ActivityPub\Processor::undoActivity($object_data);
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}
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break;
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default:
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Logger::log('Unknown activity: ' . $type . ' ' . $object_data['object_type'], Logger::DEBUG);
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break;
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}
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}
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/**
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* Fetch the receiver list from an activity array
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*
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* @param array $activity
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* @param string $actor
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* @param array $tags
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*
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* @return array with receivers (user id)
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*/
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private static function getReceivers($activity, $actor, $tags = [])
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{
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$receivers = [];
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// When it is an answer, we inherite the receivers from the parent
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$replyto = JsonLD::fetchElement($activity, 'as:inReplyTo');
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if (!empty($replyto)) {
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$parents = Item::select(['uid'], ['uri' => $replyto]);
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while ($parent = Item::fetch($parents)) {
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$receivers['uid:' . $parent['uid']] = $parent['uid'];
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}
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}
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if (!empty($actor)) {
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$profile = APContact::getByURL($actor);
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$followers = defaults($profile, 'followers', '');
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Logger::log('Actor: ' . $actor . ' - Followers: ' . $followers, Logger::DEBUG);
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} else {
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Logger::log('Empty actor', Logger::DEBUG);
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$followers = '';
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}
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foreach (['as:to', 'as:cc', 'as:bto', 'as:bcc'] as $element) {
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$receiver_list = JsonLD::fetchElementArray($activity, $element);
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if (empty($receiver_list)) {
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continue;
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}
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foreach ($receiver_list as $receiver) {
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if ($receiver == self::PUBLIC_COLLECTION) {
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$receivers['uid:0'] = 0;
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}
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if (($receiver == self::PUBLIC_COLLECTION) && !empty($actor)) {
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// This will most likely catch all OStatus connections to Mastodon
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$condition = ['alias' => [$actor, normalise_link($actor)], 'rel' => [Contact::SHARING, Contact::FRIEND]
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, 'archive' => false, 'pending' => false];
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$contacts = DBA::select('contact', ['uid'], $condition);
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while ($contact = DBA::fetch($contacts)) {
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if ($contact['uid'] != 0) {
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$receivers['uid:' . $contact['uid']] = $contact['uid'];
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}
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}
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DBA::close($contacts);
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}
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if (in_array($receiver, [$followers, self::PUBLIC_COLLECTION]) && !empty($actor)) {
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$receivers = array_merge($receivers, self::getReceiverForActor($actor, $tags));
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continue;
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}
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// Fetching all directly addressed receivers
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$condition = ['self' => true, 'nurl' => normalise_link($receiver)];
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$contact = DBA::selectFirst('contact', ['uid', 'contact-type'], $condition);
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if (!DBA::isResult($contact)) {
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continue;
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}
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// Check if the potential receiver is following the actor
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// Exception: The receiver is targetted via "to" or this is a comment
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if ((($element != 'as:to') && empty($replyto)) || ($contact['contact-type'] == Contact::ACCOUNT_TYPE_COMMUNITY)) {
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$networks = [Protocol::ACTIVITYPUB, Protocol::DFRN, Protocol::DIASPORA, Protocol::OSTATUS];
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$condition = ['nurl' => normalise_link($actor), 'rel' => [Contact::SHARING, Contact::FRIEND],
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'network' => $networks, 'archive' => false, 'pending' => false, 'uid' => $contact['uid']];
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// Forum posts are only accepted from forum contacts
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if ($contact['contact-type'] == Contact::ACCOUNT_TYPE_COMMUNITY) {
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$condition['rel'] = [Contact::SHARING, Contact::FRIEND, Contact::FOLLOWER];
|
|
}
|
|
|
|
if (!DBA::exists('contact', $condition)) {
|
|
continue;
|
|
}
|
|
}
|
|
|
|
$receivers['uid:' . $contact['uid']] = $contact['uid'];
|
|
}
|
|
}
|
|
|
|
self::switchContacts($receivers, $actor);
|
|
|
|
return $receivers;
|
|
}
|
|
|
|
/**
|
|
* Fetch the receiver list of a given actor
|
|
*
|
|
* @param string $actor
|
|
* @param array $tags
|
|
*
|
|
* @return array with receivers (user id)
|
|
*/
|
|
public static function getReceiverForActor($actor, $tags)
|
|
{
|
|
$receivers = [];
|
|
$networks = [Protocol::ACTIVITYPUB, Protocol::DFRN, Protocol::DIASPORA, Protocol::OSTATUS];
|
|
$condition = ['nurl' => normalise_link($actor), 'rel' => [Contact::SHARING, Contact::FRIEND, Contact::FOLLOWER],
|
|
'network' => $networks, 'archive' => false, 'pending' => false];
|
|
$contacts = DBA::select('contact', ['uid', 'rel'], $condition);
|
|
while ($contact = DBA::fetch($contacts)) {
|
|
if (self::isValidReceiverForActor($contact, $actor, $tags)) {
|
|
$receivers['uid:' . $contact['uid']] = $contact['uid'];
|
|
}
|
|
}
|
|
DBA::close($contacts);
|
|
return $receivers;
|
|
}
|
|
|
|
/**
|
|
* Tests if the contact is a valid receiver for this actor
|
|
*
|
|
* @param array $contact
|
|
* @param string $actor
|
|
* @param array $tags
|
|
*
|
|
* @return array with receivers (user id)
|
|
*/
|
|
private static function isValidReceiverForActor($contact, $actor, $tags)
|
|
{
|
|
// Public contacts are no valid receiver
|
|
if ($contact['uid'] == 0) {
|
|
return false;
|
|
}
|
|
|
|
// Are we following the contact? Then this is a valid receiver
|
|
if (in_array($contact['rel'], [Contact::SHARING, Contact::FRIEND])) {
|
|
return true;
|
|
}
|
|
|
|
// When the possible receiver isn't a community, then it is no valid receiver
|
|
$owner = User::getOwnerDataById($contact['uid']);
|
|
if (empty($owner) || ($owner['contact-type'] != Contact::ACCOUNT_TYPE_COMMUNITY)) {
|
|
return false;
|
|
}
|
|
|
|
// Is the community account tagged?
|
|
foreach ($tags as $tag) {
|
|
if ($tag['type'] != 'Mention') {
|
|
continue;
|
|
}
|
|
|
|
if ($tag['href'] == $owner['url']) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Switches existing contacts to ActivityPub
|
|
*
|
|
* @param integer $cid Contact ID
|
|
* @param integer $uid User ID
|
|
* @param string $url Profile URL
|
|
*/
|
|
public static function switchContact($cid, $uid, $url)
|
|
{
|
|
$profile = ActivityPub::probeProfile($url);
|
|
if (empty($profile)) {
|
|
return;
|
|
}
|
|
|
|
Logger::log('Switch contact ' . $cid . ' (' . $profile['url'] . ') for user ' . $uid . ' to ActivityPub');
|
|
|
|
$photo = defaults($profile, 'photo', null);
|
|
unset($profile['photo']);
|
|
unset($profile['baseurl']);
|
|
|
|
$profile['nurl'] = normalise_link($profile['url']);
|
|
DBA::update('contact', $profile, ['id' => $cid]);
|
|
|
|
Contact::updateAvatar($photo, $uid, $cid);
|
|
|
|
// Send a new follow request to be sure that the connection still exists
|
|
if (($uid != 0) && DBA::exists('contact', ['id' => $cid, 'rel' => [Contact::SHARING, Contact::FRIEND]])) {
|
|
ActivityPub\Transmitter::sendActivity('Follow', $profile['url'], $uid);
|
|
Logger::log('Send a new follow request to ' . $profile['url'] . ' for user ' . $uid, Logger::DEBUG);
|
|
}
|
|
}
|
|
|
|
/**
|
|
*
|
|
*
|
|
* @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);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
*
|
|
*
|
|
* @param $object_data
|
|
* @param array $activity
|
|
*
|
|
* @return
|
|
*/
|
|
private static function addActivityFields($object_data, $activity)
|
|
{
|
|
if (!empty($activity['published']) && empty($object_data['published'])) {
|
|
$object_data['published'] = JsonLD::fetchElement($activity, 'as:published', '@value');
|
|
}
|
|
|
|
if (!empty($activity['diaspora:guid']) && empty($object_data['diaspora:guid'])) {
|
|
$object_data['diaspora:guid'] = JsonLD::fetchElement($activity, 'diaspora:guid');
|
|
}
|
|
|
|
$object_data['service'] = JsonLD::fetchElement($activity, 'as:instrument', 'as:name', '@type', 'as:Service');
|
|
|
|
return $object_data;
|
|
}
|
|
|
|
/**
|
|
* Fetches the object data from external ressources if needed
|
|
*
|
|
* @param string $object_id Object ID of the the provided object
|
|
* @param array $object The provided object array
|
|
* @param boolean $trust_source Do we trust the provided object?
|
|
* @param integer $uid User ID for the signature that we use to fetch data
|
|
*
|
|
* @return array with trusted and valid object data
|
|
*/
|
|
private static function fetchObject($object_id, $object = [], $trust_source = false, $uid = 0)
|
|
{
|
|
// By fetching the type we check if the object is complete.
|
|
$type = JsonLD::fetchElement($object, '@type');
|
|
|
|
if (!$trust_source || empty($type)) {
|
|
$data = ActivityPub::fetchContent($object_id, $uid);
|
|
if (!empty($data)) {
|
|
$object = JsonLD::compact($data);
|
|
Logger::log('Fetched content for ' . $object_id, Logger::DEBUG);
|
|
} else {
|
|
Logger::log('Empty content for ' . $object_id . ', check if content is available locally.', Logger::DEBUG);
|
|
|
|
$item = Item::selectFirst([], ['uri' => $object_id]);
|
|
if (!DBA::isResult($item)) {
|
|
Logger::log('Object with url ' . $object_id . ' was not found locally.', Logger::DEBUG);
|
|
return false;
|
|
}
|
|
Logger::log('Using already stored item for url ' . $object_id, Logger::DEBUG);
|
|
$data = ActivityPub\Transmitter::createNote($item);
|
|
$object = JsonLD::compact($data);
|
|
}
|
|
} else {
|
|
Logger::log('Using original object for url ' . $object_id, Logger::DEBUG);
|
|
}
|
|
|
|
$type = JsonLD::fetchElement($object, '@type');
|
|
|
|
if (empty($type)) {
|
|
Logger::log('Empty type', Logger::DEBUG);
|
|
return false;
|
|
}
|
|
|
|
if (in_array($type, self::CONTENT_TYPES)) {
|
|
return self::processObject($object);
|
|
}
|
|
|
|
if ($type == 'as:Announce') {
|
|
$object_id = JsonLD::fetchElement($object, 'object');
|
|
if (empty($object_id)) {
|
|
return false;
|
|
}
|
|
return self::fetchObject($object_id, [], false, $uid);
|
|
}
|
|
|
|
Logger::log('Unhandled object type: ' . $type, Logger::DEBUG);
|
|
}
|
|
|
|
/**
|
|
* Convert tags from JSON-LD format into a simplified format
|
|
*
|
|
* @param array $tags Tags in JSON-LD format
|
|
*
|
|
* @return array with tags in a simplified format
|
|
*/
|
|
private static function processTags($tags)
|
|
{
|
|
$taglist = [];
|
|
|
|
if (empty($tags)) {
|
|
return [];
|
|
}
|
|
|
|
foreach ($tags as $tag) {
|
|
if (empty($tag)) {
|
|
continue;
|
|
}
|
|
|
|
$taglist[] = ['type' => str_replace('as:', '', JsonLD::fetchElement($tag, '@type')),
|
|
'href' => JsonLD::fetchElement($tag, 'as:href'),
|
|
'name' => JsonLD::fetchElement($tag, 'as:name')];
|
|
}
|
|
return $taglist;
|
|
}
|
|
|
|
/**
|
|
* Convert attachments from JSON-LD format into a simplified format
|
|
*
|
|
* @param array $attachments Attachments in JSON-LD format
|
|
*
|
|
* @return array with attachmants in a simplified format
|
|
*/
|
|
private static function processAttachments($attachments)
|
|
{
|
|
$attachlist = [];
|
|
|
|
if (empty($attachments)) {
|
|
return [];
|
|
}
|
|
|
|
foreach ($attachments as $attachment) {
|
|
if (empty($attachment)) {
|
|
continue;
|
|
}
|
|
|
|
$attachlist[] = ['type' => str_replace('as:', '', JsonLD::fetchElement($attachment, '@type')),
|
|
'mediaType' => JsonLD::fetchElement($attachment, 'as:mediaType'),
|
|
'name' => JsonLD::fetchElement($attachment, 'as:name'),
|
|
'url' => JsonLD::fetchElement($attachment, 'as:url')];
|
|
}
|
|
return $attachlist;
|
|
}
|
|
|
|
/**
|
|
* Fetches data from the object part of an activity
|
|
*
|
|
* @param array $object
|
|
*
|
|
* @return array
|
|
*/
|
|
private static function processObject($object)
|
|
{
|
|
if (!JsonLD::fetchElement($object, '@id')) {
|
|
return false;
|
|
}
|
|
|
|
$object_data = [];
|
|
$object_data['object_type'] = JsonLD::fetchElement($object, '@type');
|
|
$object_data['id'] = JsonLD::fetchElement($object, '@id');
|
|
|
|
$object_data['reply-to-id'] = JsonLD::fetchElement($object, 'as:inReplyTo');
|
|
|
|
if (empty($object_data['reply-to-id'])) {
|
|
$object_data['reply-to-id'] = $object_data['id'];
|
|
}
|
|
|
|
$object_data['published'] = JsonLD::fetchElement($object, 'as:published', '@value');
|
|
$object_data['updated'] = JsonLD::fetchElement($object, 'as:updated', '@value');
|
|
|
|
if (empty($object_data['updated'])) {
|
|
$object_data['updated'] = $object_data['published'];
|
|
}
|
|
|
|
if (empty($object_data['published']) && !empty($object_data['updated'])) {
|
|
$object_data['published'] = $object_data['updated'];
|
|
}
|
|
|
|
$actor = JsonLD::fetchElement($object, 'as:attributedTo');
|
|
if (empty($actor)) {
|
|
$actor = JsonLD::fetchElement($object, 'as:actor');
|
|
}
|
|
|
|
$object_data['diaspora:guid'] = JsonLD::fetchElement($object, 'diaspora:guid');
|
|
$object_data['diaspora:comment'] = JsonLD::fetchElement($object, 'diaspora:comment');
|
|
$object_data['diaspora:like'] = JsonLD::fetchElement($object, 'diaspora:like');
|
|
$object_data['actor'] = $object_data['author'] = $actor;
|
|
$object_data['context'] = JsonLD::fetchElement($object, 'as:context');
|
|
$object_data['conversation'] = JsonLD::fetchElement($object, 'ostatus:conversation');
|
|
$object_data['sensitive'] = JsonLD::fetchElement($object, 'as:sensitive');
|
|
$object_data['name'] = JsonLD::fetchElement($object, 'as:name');
|
|
$object_data['summary'] = JsonLD::fetchElement($object, 'as:summary');
|
|
$object_data['content'] = JsonLD::fetchElement($object, 'as:content');
|
|
$object_data['source'] = JsonLD::fetchElement($object, 'as:source', 'as:content', 'as:mediaType', 'text/bbcode');
|
|
$object_data['start-time'] = JsonLD::fetchElement($object, 'as:startTime', '@value');
|
|
$object_data['end-time'] = JsonLD::fetchElement($object, 'as:endTime', '@value');
|
|
$object_data['location'] = JsonLD::fetchElement($object, 'as:location', 'as:name', '@type', 'as:Place');
|
|
$object_data['latitude'] = JsonLD::fetchElement($object, 'as:location', 'as:latitude', '@type', 'as:Place');
|
|
$object_data['latitude'] = JsonLD::fetchElement($object_data, 'latitude', '@value');
|
|
$object_data['longitude'] = JsonLD::fetchElement($object, 'as:location', 'as:longitude', '@type', 'as:Place');
|
|
$object_data['longitude'] = JsonLD::fetchElement($object_data, 'longitude', '@value');
|
|
$object_data['attachments'] = self::processAttachments(JsonLD::fetchElementArray($object, 'as:attachment'));
|
|
$object_data['tags'] = self::processTags(JsonLD::fetchElementArray($object, 'as:tag'));
|
|
$object_data['generator'] = JsonLD::fetchElement($object, 'as:generator', 'as:name', '@type', 'as:Application');
|
|
$object_data['alternate-url'] = JsonLD::fetchElement($object, 'as:url');
|
|
|
|
// Special treatment for Hubzilla links
|
|
if (is_array($object_data['alternate-url'])) {
|
|
$object_data['alternate-url'] = JsonLD::fetchElement($object_data['alternate-url'], 'as:href');
|
|
|
|
if (!is_string($object_data['alternate-url'])) {
|
|
$object_data['alternate-url'] = JsonLD::fetchElement($object['as:url'], 'as:href');
|
|
}
|
|
}
|
|
|
|
$object_data['receiver'] = self::getReceivers($object, $object_data['actor'], $object_data['tags']);
|
|
|
|
// Common object data:
|
|
|
|
// Unhandled
|
|
// @context, type, actor, signature, mediaType, duration, replies, icon
|
|
|
|
// Also missing: (Defined in the standard, but currently unused)
|
|
// audience, preview, endTime, startTime, image
|
|
|
|
// Data in Notes:
|
|
|
|
// Unhandled
|
|
// contentMap, announcement_count, announcements, context_id, likes, like_count
|
|
// inReplyToStatusId, shares, quoteUrl, statusnetConversationId
|
|
|
|
// Data in video:
|
|
|
|
// To-Do?
|
|
// category, licence, language, commentsEnabled
|
|
|
|
// Unhandled
|
|
// views, waitTranscoding, state, support, subtitleLanguage
|
|
// likes, dislikes, shares, comments
|
|
|
|
return $object_data;
|
|
}
|
|
}
|