493 lines
13 KiB
PHP
493 lines
13 KiB
PHP
<?php
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/**
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* @file src/Protocol/ActivityPub/Processor.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\Core\Protocol;
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use Friendica\Model\Conversation;
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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\Content\Text\HTML;
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use Friendica\Util\JsonLD;
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use Friendica\Core\Config;
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use Friendica\Protocol\ActivityPub;
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/**
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* ActivityPub Protocol class
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*
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* To-Do:
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* - Store Diaspora signature
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*/
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class Processor
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{
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/**
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* Converts mentions from Pleroma into the Friendica format
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*
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* @param string $body
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*
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* @return converted body
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*/
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private static function convertMentions($body)
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{
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$URLSearchString = "^\[\]";
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$body = preg_replace("/\[url\=([$URLSearchString]*)\]([#@!])(.*?)\[\/url\]/ism", '$2[url=$1]$3[/url]', $body);
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return $body;
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}
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/**
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* Constructs a string with tags for a given tag array
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*
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* @param array $tags
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* @param boolean $sensitive
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*
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* @return string with tags
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*/
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private static function constructTagList($tags, $sensitive)
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{
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if (empty($tags)) {
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return '';
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}
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$tag_text = '';
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foreach ($tags as $tag) {
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if (in_array(defaults($tag, 'type', ''), ['Mention', 'Hashtag'])) {
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if (!empty($tag_text)) {
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$tag_text .= ',';
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}
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$tag_text .= substr($tag['name'], 0, 1) . '[url=' . $tag['href'] . ']' . substr($tag['name'], 1) . '[/url]';
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}
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}
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/// @todo add nsfw for $sensitive
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return $tag_text;
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}
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/**
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* Add attachment data to the item array
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*
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* @param array $attachments
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* @param array $item
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*
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* @return item array
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*/
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private static function constructAttachList($attachments, $item)
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{
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if (empty($attachments)) {
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return $item;
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}
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foreach ($attachments as $attach) {
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$filetype = strtolower(substr($attach['mediaType'], 0, strpos($attach['mediaType'], '/')));
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if ($filetype == 'image') {
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$item['body'] .= "\n[img]" . $attach['url'] . '[/img]';
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} else {
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if (!empty($item["attach"])) {
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$item["attach"] .= ',';
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} else {
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$item["attach"] = '';
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}
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if (!isset($attach['length'])) {
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$attach['length'] = "0";
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}
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$item["attach"] .= '[attach]href="'.$attach['url'].'" length="'.$attach['length'].'" type="'.$attach['mediaType'].'" title="'.defaults($attach, 'name', '').'"[/attach]';
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}
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}
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return $item;
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}
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/**
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* Prepares data for a message
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*
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* @param array $activity Activity array
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*/
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public static function createItem($activity)
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{
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$item = [];
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$item['verb'] = ACTIVITY_POST;
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$item['parent-uri'] = $activity['reply-to-id'];
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if ($activity['reply-to-id'] == $activity['id']) {
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$item['gravity'] = GRAVITY_PARENT;
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$item['object-type'] = ACTIVITY_OBJ_NOTE;
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} else {
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$item['gravity'] = GRAVITY_COMMENT;
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$item['object-type'] = ACTIVITY_OBJ_COMMENT;
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}
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if (($activity['id'] != $activity['reply-to-id']) && !Item::exists(['uri' => $activity['reply-to-id']])) {
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logger('Parent ' . $activity['reply-to-id'] . ' not found. Try to refetch it.');
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self::fetchMissingActivity($activity['reply-to-id'], $activity);
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}
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self::postItem($activity, $item);
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}
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/**
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* Prepare the item array for a "like"
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*
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* @param array $activity Activity array
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*/
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public static function likeItem($activity)
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{
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$item = [];
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$item['verb'] = ACTIVITY_LIKE;
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$item['parent-uri'] = $activity['object_id'];
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$item['gravity'] = GRAVITY_ACTIVITY;
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$item['object-type'] = ACTIVITY_OBJ_NOTE;
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self::postItem($activity, $item);
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}
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/**
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* Delete items
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*
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* @param array $activity
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*/
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public static function deleteItem($activity)
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{
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$owner = Contact::getIdForURL($activity['actor']);
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logger('Deleting item ' . $activity['object_id'] . ' from ' . $owner, LOGGER_DEBUG);
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Item::delete(['uri' => $activity['object_id'], 'owner-id' => $owner]);
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}
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/**
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* Prepare the item array for a "dislike"
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*
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* @param array $activity Activity array
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*/
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public static function dislikeItem($activity)
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{
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$item = [];
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$item['verb'] = ACTIVITY_DISLIKE;
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$item['parent-uri'] = $activity['object_id'];
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$item['gravity'] = GRAVITY_ACTIVITY;
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$item['object-type'] = ACTIVITY_OBJ_NOTE;
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self::postItem($activity, $item);
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}
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/**
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* Creates an item post
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*
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* @param array $activity Activity data
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* @param array $item item array
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*/
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private static function postItem($activity, $item)
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{
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/// @todo What to do with $activity['context']?
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if (($item['gravity'] != GRAVITY_PARENT) && !Item::exists(['uri' => $item['parent-uri']])) {
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logger('Parent ' . $item['parent-uri'] . ' not found, message will be discarded.', LOGGER_DEBUG);
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return;
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}
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$item['network'] = Protocol::ACTIVITYPUB;
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$item['private'] = !in_array(0, $activity['receiver']);
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$item['author-link'] = $activity['author'];
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$item['author-id'] = Contact::getIdForURL($activity['author'], 0, true);
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if (empty($activity['thread-completion'])) {
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$item['owner-link'] = $activity['actor'];
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$item['owner-id'] = Contact::getIdForURL($activity['actor'], 0, true);
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} else {
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logger('Ignoring actor because of thread completion.', LOGGER_DEBUG);
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$item['owner-link'] = $item['author-link'];
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$item['owner-id'] = $item['author-id'];
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}
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$item['uri'] = $activity['id'];
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$item['created'] = $activity['published'];
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$item['edited'] = $activity['updated'];
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$item['guid'] = $activity['diaspora:guid'];
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$item['title'] = HTML::toBBCode($activity['name']);
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$item['content-warning'] = HTML::toBBCode($activity['summary']);
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$item['body'] = self::convertMentions(HTML::toBBCode($activity['content']));
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$item['location'] = $activity['location'];
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if (!empty($item['latitude']) && !empty($item['longitude'])) {
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$item['coord'] = $item['latitude'] . ' ' . $item['longitude'];
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}
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$item['tag'] = self::constructTagList($activity['tags'], $activity['sensitive']);
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$item['app'] = $activity['generator'];
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$item['plink'] = defaults($activity, 'alternate-url', $item['uri']);
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$item['diaspora_signed_text'] = defaults($activity, 'diaspora:comment', '');
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$item = self::constructAttachList($activity['attachments'], $item);
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if (!empty($activity['source'])) {
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$item['body'] = $activity['source'];
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}
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foreach ($activity['receiver'] as $receiver) {
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$item['uid'] = $receiver;
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$item['contact-id'] = Contact::getIdForURL($activity['author'], $receiver, true);
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if (($receiver != 0) && empty($item['contact-id'])) {
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$item['contact-id'] = Contact::getIdForURL($activity['author'], 0, true);
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}
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$item_id = Item::insert($item);
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logger('Storing for user ' . $item['uid'] . ': ' . $item_id);
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}
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}
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/**
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* Fetches missing posts
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*
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* @param $url
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* @param $child
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*/
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private static function fetchMissingActivity($url, $child)
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{
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if (Config::get('system', 'ostatus_full_threads')) {
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return;
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}
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$object = ActivityPub::fetchContent($url);
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if (empty($object)) {
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logger('Activity ' . $url . ' was not fetchable, aborting.');
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return;
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}
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$activity = [];
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$activity['@context'] = $object['@context'];
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unset($object['@context']);
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$activity['id'] = $object['id'];
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$activity['to'] = defaults($object, 'to', []);
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$activity['cc'] = defaults($object, 'cc', []);
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$activity['actor'] = $child['author'];
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$activity['object'] = $object;
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$activity['published'] = $object['published'];
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$activity['type'] = 'Create';
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$ldactivity = JsonLD::compact($activity);
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$ldactivity['thread-completion'] = true;
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ActivityPub\Receiver::processActivity($ldactivity);
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logger('Activity ' . $url . ' had been fetched and processed.');
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}
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/**
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* perform a "follow" request
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*
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* @param array $activity
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*/
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public static function followUser($activity)
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{
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$uid = User::getIdForURL($activity['object_id']);
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if (empty($uid)) {
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return;
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}
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$owner = User::getOwnerDataById($uid);
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$cid = Contact::getIdForURL($activity['actor'], $uid);
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if (!empty($cid)) {
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self::switchContact($cid);
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$contact = DBA::selectFirst('contact', [], ['id' => $cid, 'network' => Protocol::NATIVE_SUPPORT]);
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} else {
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$contact = false;
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}
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$item = ['author-id' => Contact::getIdForURL($activity['actor']),
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'author-link' => $activity['actor']];
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// Ensure that the contact has got the right network type
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self::switchContact($item['author-id']);
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Contact::addRelationship($owner, $contact, $item);
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$cid = Contact::getIdForURL($activity['actor'], $uid);
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if (empty($cid)) {
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return;
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}
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DBA::update('contact', ['hub-verify' => $activity['id']], ['id' => $cid]);
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logger('Follow user ' . $uid . ' from contact ' . $cid . ' with id ' . $activity['id']);
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}
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/**
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* Update the given profile
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*
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* @param array $activity
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*/
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public static function updatePerson($activity)
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{
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if (empty($activity['object_id'])) {
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return;
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}
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logger('Updating profile for ' . $activity['object_id'], LOGGER_DEBUG);
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APContact::getByURL($activity['object_id'], true);
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}
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/**
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* Delete the given profile
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*
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* @param array $activity
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*/
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public static function deletePerson($activity)
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{
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if (empty($activity['object_id']) || empty($activity['actor'])) {
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logger('Empty object id or actor.', LOGGER_DEBUG);
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return;
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}
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if ($activity['object_id'] != $activity['actor']) {
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logger('Object id does not match actor.', LOGGER_DEBUG);
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return;
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}
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$contacts = DBA::select('contact', ['id'], ['nurl' => normalise_link($activity['object_id'])]);
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while ($contact = DBA::fetch($contacts)) {
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Contact::remove($contact['id']);
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}
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DBA::close($contacts);
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logger('Deleted contact ' . $activity['object_id'], LOGGER_DEBUG);
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}
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/**
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* Accept a follow request
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*
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* @param array $activity
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*/
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public static function acceptFollowUser($activity)
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{
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$uid = User::getIdForURL($activity['object_actor']);
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if (empty($uid)) {
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return;
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}
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$owner = User::getOwnerDataById($uid);
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$cid = Contact::getIdForURL($activity['actor'], $uid);
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if (empty($cid)) {
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logger('No contact found for ' . $activity['actor'], LOGGER_DEBUG);
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return;
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}
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self::switchContact($cid);
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$fields = ['pending' => false];
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$contact = DBA::selectFirst('contact', ['rel'], ['id' => $cid]);
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if ($contact['rel'] == Contact::FOLLOWER) {
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$fields['rel'] = Contact::FRIEND;
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}
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$condition = ['id' => $cid];
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DBA::update('contact', $fields, $condition);
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logger('Accept contact request from contact ' . $cid . ' for user ' . $uid, LOGGER_DEBUG);
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}
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/**
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* Reject a follow request
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*
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* @param array $activity
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*/
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public static function rejectFollowUser($activity)
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{
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$uid = User::getIdForURL($activity['object_actor']);
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if (empty($uid)) {
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return;
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}
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$owner = User::getOwnerDataById($uid);
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$cid = Contact::getIdForURL($activity['actor'], $uid);
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if (empty($cid)) {
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logger('No contact found for ' . $activity['actor'], LOGGER_DEBUG);
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return;
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}
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self::switchContact($cid);
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if (DBA::exists('contact', ['id' => $cid, 'rel' => Contact::SHARING, 'pending' => true])) {
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Contact::remove($cid);
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logger('Rejected contact request from contact ' . $cid . ' for user ' . $uid . ' - contact had been removed.', LOGGER_DEBUG);
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} else {
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logger('Rejected contact request from contact ' . $cid . ' for user ' . $uid . '.', LOGGER_DEBUG);
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}
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}
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/**
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* Undo activity like "like" or "dislike"
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*
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* @param array $activity
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*/
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public static function undoActivity($activity)
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{
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if (empty($activity['object_id'])) {
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return;
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}
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if (empty($activity['object_actor'])) {
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return;
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}
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$author_id = Contact::getIdForURL($activity['object_actor']);
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if (empty($author_id)) {
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return;
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}
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Item::delete(['uri' => $activity['object_id'], 'author-id' => $author_id, 'gravity' => GRAVITY_ACTIVITY]);
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}
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/**
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* Activity to remove a follower
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*
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* @param array $activity
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*/
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public static function undoFollowUser($activity)
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{
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$uid = User::getIdForURL($activity['object_object']);
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if (empty($uid)) {
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return;
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}
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$owner = User::getOwnerDataById($uid);
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$cid = Contact::getIdForURL($activity['actor'], $uid);
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if (empty($cid)) {
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logger('No contact found for ' . $activity['actor'], LOGGER_DEBUG);
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return;
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}
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self::switchContact($cid);
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$contact = DBA::selectFirst('contact', [], ['id' => $cid]);
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if (!DBA::isResult($contact)) {
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return;
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}
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Contact::removeFollower($owner, $contact);
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logger('Undo following request from contact ' . $cid . ' for user ' . $uid, LOGGER_DEBUG);
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}
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/**
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* Switches a contact to AP if needed
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*
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* @param integer $cid Contact ID
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*/
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private static function switchContact($cid)
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{
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$contact = DBA::selectFirst('contact', ['network'], ['id' => $cid, 'network' => Protocol::NATIVE_SUPPORT]);
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if (!DBA::isResult($contact) || ($contact['network'] == Protocol::ACTIVITYPUB)) {
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return;
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}
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logger('Change existing contact ' . $cid . ' from ' . $contact['network'] . ' to ActivityPub.');
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Contact::updateFromProbe($cid, Protocol::ACTIVITYPUB);
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}
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}
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