mirror of https://github.com/friendica/friendica
701 lines
20 KiB
PHP
701 lines
20 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\Content\Text\HTML;
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use Friendica\Core\Config;
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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\Event;
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use Friendica\Model\Term;
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use Friendica\Model\User;
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use Friendica\Protocol\ActivityPub;
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use Friendica\Util\DateTimeFormat;
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use Friendica\Util\JsonLD;
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use Friendica\Util\Strings;
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/**
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* ActivityPub Processor Protocol class
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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 $body
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*
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* @return string converted body
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*/
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private static function convertMentions($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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* Replaces emojis in the body
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*
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* @param array $emojis
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* @param string $body
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*
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* @return string with replaced emojis
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*/
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public static function replaceEmojis($body, array $emojis)
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{
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foreach ($emojis as $emoji) {
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$replace = '[class=emoji mastodon][img=' . $emoji['href'] . ']' . $emoji['name'] . '[/img][/class]';
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$body = str_replace($emoji['name'], $replace, $body);
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}
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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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* @param array $implicit_mentions List of profile URLs to skip
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* @return string with tags
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*/
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private static function constructTagString($tags, $sensitive, array $implicit_mentions)
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{
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if (empty($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']) && !in_array($tag['href'], $implicit_mentions)) {
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if (!empty($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 $item
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*
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* @return array array
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*/
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private static function constructAttachList($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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* Updates a message
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*
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* @param array $activity Activity array
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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public static function updateItem($activity)
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{
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$item = Item::selectFirst(['uri', 'parent-uri', 'gravity'], ['uri' => $activity['id']]);
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if (!DBA::isResult($item)) {
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Logger::warning('Unknown item', ['uri' => $activity['id']]);
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return;
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}
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$item['changed'] = DateTimeFormat::utcNow();
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$item['edited'] = $activity['updated'];
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$item['title'] = HTML::toBBCode($activity['name']);
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$item['content-warning'] = HTML::toBBCode($activity['summary']);
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$content = HTML::toBBCode($activity['content']);
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$content = self::replaceEmojis($content, $activity['emojis']);
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$content = self::convertMentions($content);
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$implicit_mentions = [];
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if (($item['parent-uri'] != $item['uri']) && ($item['gravity'] == GRAVITY_COMMENT)) {
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$parent = Item::selectFirst(['id', 'author-link', 'alias'], ['uri' => $item['parent-uri']]);
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if (!DBA::isResult($parent)) {
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Logger::warning('Unknown parent item.', ['uri' => $item['parent-uri']]);
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return;
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}
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$implicit_mentions = self::getImplicitMentionList($parent);
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$content = self::removeImplicitMentionsFromBody($content, $implicit_mentions);
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}
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$item['body'] = $content;
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$item['tag'] = self::constructTagString($activity['tags'], $activity['sensitive'], $implicit_mentions);
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Item::update($item, ['uri' => $activity['id']]);
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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 $activity Activity array
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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* @throws \ImagickException
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*/
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public static function createItem($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::log('Parent ' . $activity['reply-to-id'] . ' not found. Try to refetch it.');
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self::fetchMissingActivity($activity['reply-to-id'], $activity);
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}
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$item['diaspora_signed_text'] = defaults($activity, 'diaspora:comment', '');
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self::postItem($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 $activity
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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* @throws \ImagickException
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*/
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public static function deleteItem($activity)
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{
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$owner = Contact::getIdForURL($activity['actor']);
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Logger::log('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 an activity
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*
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* @param array $activity Activity array
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* @param string $verb Activity verb
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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* @throws \ImagickException
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*/
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public static function createActivity($activity, $verb)
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{
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$item = [];
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$item['verb'] = $verb;
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$item['parent-uri'] = $activity['object_id'];
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$item['gravity'] = GRAVITY_ACTIVITY;
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$item['object-type'] = ACTIVITY_OBJ_NOTE;
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$item['diaspora_signed_text'] = defaults($activity, 'diaspora:like', '');
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self::postItem($activity, $item);
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}
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/**
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* Create an event
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*
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* @param array $activity Activity array
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* @param array $item
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* @throws \Exception
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*/
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public static function createEvent($activity, $item)
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{
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$event['summary'] = HTML::toBBCode($activity['name']);
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$event['desc'] = HTML::toBBCode($activity['content']);
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$event['start'] = $activity['start-time'];
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$event['finish'] = $activity['end-time'];
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$event['nofinish'] = empty($event['finish']);
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$event['location'] = $activity['location'];
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$event['adjust'] = true;
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$event['cid'] = $item['contact-id'];
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$event['uid'] = $item['uid'];
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$event['uri'] = $item['uri'];
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$event['edited'] = $item['edited'];
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$event['private'] = $item['private'];
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$event['guid'] = $item['guid'];
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$event['plink'] = $item['plink'];
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$condition = ['uri' => $item['uri'], 'uid' => $item['uid']];
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$ev = DBA::selectFirst('event', ['id'], $condition);
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if (DBA::isResult($ev)) {
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$event['id'] = $ev['id'];
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}
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$event_id = Event::store($event);
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Logger::log('Event '.$event_id.' was stored', Logger::DEBUG);
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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 $item item array
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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* @throws \ImagickException
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*/
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private static function postItem($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::log('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($activity['actor'], 0, true);
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} else {
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Logger::log('Ignoring actor because of thread completion.', Logger::DEBUG);
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$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'] = $activity['id'];
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$content = HTML::toBBCode($activity['content']);
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$content = self::replaceEmojis($content, $activity['emojis']);
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$content = self::convertMentions($content);
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$implicit_mentions = [];
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if (($item['parent-uri'] != $item['uri']) && ($item['gravity'] == GRAVITY_COMMENT)) {
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$item_private = !in_array(0, $activity['item_receiver']);
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$parent = Item::selectFirst(['id', 'private', 'author-link', 'alias'], ['uri' => $item['parent-uri']]);
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if (!DBA::isResult($parent)) {
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return;
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}
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if ($item_private && !$parent['private']) {
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Logger::log('Item ' . $item['uri'] . ' is private but the parent ' . $item['parent-uri'] . ' is not. So we drop it.');
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return;
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}
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$implicit_mentions = self::getImplicitMentionList($parent);
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$content = self::removeImplicitMentionsFromBody($content, $implicit_mentions);
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}
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$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'] = $content;
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if (($activity['object_type'] == 'as:Video') && !empty($activity['alternate-url'])) {
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$item['body'] .= "\n[video]" . $activity['alternate-url'] . '[/video]';
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}
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$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::constructTagString($activity['tags'], $activity['sensitive'], $implicit_mentions);
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$item['app'] = $activity['generator'];
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$item['plink'] = defaults($activity, 'alternate-url', $item['uri']);
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$item = 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($activity['author'], 0, true);
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}
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if ($activity['object_type'] == 'as:Event') {
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self::createEvent($activity, $item);
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}
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$item_id = Item::insert($item);
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Logger::log('Storing for user ' . $item['uid'] . ': ' . $item_id);
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}
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if (!$item['private'] && ($item['gravity'] == GRAVITY_PARENT) && ($item['author-link'] != $item['owner-link'])) {
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$author = APContact::getByURL($item['owner-link'], false);
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// We send automatic follow requests for reshared messages. (We don't need though for forum posts)
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if ($author['type'] != 'Group') {
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Logger::log('Send follow request for ' . $item['uri'] . ' to ' . $item['author-link'], Logger::DEBUG);
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ActivityPub\Transmitter::sendFollowObject($item['uri'], $item['author-link']);
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}
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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 $child
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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private static function fetchMissingActivity($url, $child)
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{
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if (Config::get('system', 'ostatus_full_threads')) {
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return;
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}
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$uid = ActivityPub\Receiver::getFirstUserFromReceivers($child['receiver']);
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$object = ActivityPub::fetchContent($url, $uid);
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if (empty($object)) {
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Logger::log('Activity ' . $url . ' was not fetchable, aborting.');
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return;
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}
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if (empty($object['id'])) {
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Logger::log('Activity ' . $url . ' has got not id, aborting. ' . json_encode($object));
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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'] = defaults($object, 'published', $child['published']);
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$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::log('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 $activity
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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* @throws \ImagickException
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*/
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public static function followUser($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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DBA::update('contact', ['hub-verify' => $activity['id']], ['id' => $cid]);
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$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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if (empty($contact)) {
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DBA::update('contact', ['hub-verify' => $activity['id']], ['id' => $cid]);
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}
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Logger::log('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 $activity
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* @throws \Exception
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*/
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public static function updatePerson($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::log('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 $activity
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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public static function deletePerson($activity)
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{
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if (empty($activity['object_id']) || empty($activity['actor'])) {
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Logger::log('Empty object id or actor.', Logger::DEBUG);
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return;
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}
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if ($activity['object_id'] != $activity['actor']) {
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Logger::log('Object id does not match actor.', Logger::DEBUG);
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return;
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}
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$contacts = DBA::select('contact', ['id'], ['nurl' => Strings::normaliseLink($activity['object_id'])]);
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while ($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::log('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 $activity
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
|
|
* @throws \ImagickException
|
|
*/
|
|
public static function acceptFollowUser($activity)
|
|
{
|
|
$uid = User::getIdForURL($activity['object_actor']);
|
|
if (empty($uid)) {
|
|
return;
|
|
}
|
|
|
|
$cid = Contact::getIdForURL($activity['actor'], $uid);
|
|
if (empty($cid)) {
|
|
Logger::log('No contact found for ' . $activity['actor'], Logger::DEBUG);
|
|
return;
|
|
}
|
|
|
|
self::switchContact($cid);
|
|
|
|
$fields = ['pending' => false];
|
|
|
|
$contact = DBA::selectFirst('contact', ['rel'], ['id' => $cid]);
|
|
if ($contact['rel'] == Contact::FOLLOWER) {
|
|
$fields['rel'] = Contact::FRIEND;
|
|
}
|
|
|
|
$condition = ['id' => $cid];
|
|
DBA::update('contact', $fields, $condition);
|
|
Logger::log('Accept contact request from contact ' . $cid . ' for user ' . $uid, Logger::DEBUG);
|
|
}
|
|
|
|
/**
|
|
* Reject a follow request
|
|
*
|
|
* @param array $activity
|
|
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
|
|
* @throws \ImagickException
|
|
*/
|
|
public static function rejectFollowUser($activity)
|
|
{
|
|
$uid = User::getIdForURL($activity['object_actor']);
|
|
if (empty($uid)) {
|
|
return;
|
|
}
|
|
|
|
$cid = Contact::getIdForURL($activity['actor'], $uid);
|
|
if (empty($cid)) {
|
|
Logger::log('No contact found for ' . $activity['actor'], Logger::DEBUG);
|
|
return;
|
|
}
|
|
|
|
self::switchContact($cid);
|
|
|
|
if (DBA::exists('contact', ['id' => $cid, 'rel' => Contact::SHARING, 'pending' => true])) {
|
|
Contact::remove($cid);
|
|
Logger::log('Rejected contact request from contact ' . $cid . ' for user ' . $uid . ' - contact had been removed.', Logger::DEBUG);
|
|
} else {
|
|
Logger::log('Rejected contact request from contact ' . $cid . ' for user ' . $uid . '.', Logger::DEBUG);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Undo activity like "like" or "dislike"
|
|
*
|
|
* @param array $activity
|
|
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
|
|
* @throws \ImagickException
|
|
*/
|
|
public static function undoActivity($activity)
|
|
{
|
|
if (empty($activity['object_id'])) {
|
|
return;
|
|
}
|
|
|
|
if (empty($activity['object_actor'])) {
|
|
return;
|
|
}
|
|
|
|
$author_id = Contact::getIdForURL($activity['object_actor']);
|
|
if (empty($author_id)) {
|
|
return;
|
|
}
|
|
|
|
Item::delete(['uri' => $activity['object_id'], 'author-id' => $author_id, 'gravity' => GRAVITY_ACTIVITY]);
|
|
}
|
|
|
|
/**
|
|
* Activity to remove a follower
|
|
*
|
|
* @param array $activity
|
|
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
|
|
* @throws \ImagickException
|
|
*/
|
|
public static function undoFollowUser($activity)
|
|
{
|
|
$uid = User::getIdForURL($activity['object_object']);
|
|
if (empty($uid)) {
|
|
return;
|
|
}
|
|
|
|
$owner = User::getOwnerDataById($uid);
|
|
|
|
$cid = Contact::getIdForURL($activity['actor'], $uid);
|
|
if (empty($cid)) {
|
|
Logger::log('No contact found for ' . $activity['actor'], Logger::DEBUG);
|
|
return;
|
|
}
|
|
|
|
self::switchContact($cid);
|
|
|
|
$contact = DBA::selectFirst('contact', [], ['id' => $cid]);
|
|
if (!DBA::isResult($contact)) {
|
|
return;
|
|
}
|
|
|
|
Contact::removeFollower($owner, $contact);
|
|
Logger::log('Undo following request from contact ' . $cid . ' for user ' . $uid, Logger::DEBUG);
|
|
}
|
|
|
|
/**
|
|
* Switches a contact to AP if needed
|
|
*
|
|
* @param integer $cid Contact ID
|
|
* @throws \Exception
|
|
*/
|
|
private static function switchContact($cid)
|
|
{
|
|
$contact = DBA::selectFirst('contact', ['network'], ['id' => $cid, 'network' => Protocol::NATIVE_SUPPORT]);
|
|
if (!DBA::isResult($contact) || ($contact['network'] == Protocol::ACTIVITYPUB)) {
|
|
return;
|
|
}
|
|
|
|
Logger::log('Change existing contact ' . $cid . ' from ' . $contact['network'] . ' to ActivityPub.');
|
|
Contact::updateFromProbe($cid, Protocol::ACTIVITYPUB);
|
|
}
|
|
|
|
/**
|
|
* Collects implicit mentions like:
|
|
* - the author of the parent item
|
|
* - all the mentioned conversants in the parent item
|
|
*
|
|
* @param array $parent Item array with at least ['id', 'author-link', 'alias']
|
|
* @return array
|
|
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
|
|
*/
|
|
private static function getImplicitMentionList(array $parent)
|
|
{
|
|
$parent_terms = Term::tagArrayFromItemId($parent['id'], [TERM_MENTION]);
|
|
|
|
$implicit_mentions = [
|
|
$parent['author-link']
|
|
];
|
|
|
|
if ($parent['alias']) {
|
|
$implicit_mentions[] = $parent['alias'];
|
|
}
|
|
|
|
foreach ($parent_terms as $term) {
|
|
$contact = Contact::getDetailsByURL($term['url']);
|
|
|
|
$implicit_mentions[] = $contact['url'];
|
|
$implicit_mentions[] = $contact['nurl'];
|
|
$implicit_mentions[] = $contact['alias'];
|
|
}
|
|
|
|
return $implicit_mentions;
|
|
}
|
|
|
|
/**
|
|
* Strips from the body prepended implicit mentions
|
|
*
|
|
* @param string $body
|
|
* @param array $implicit_mentions List of profile URLs
|
|
* @return string
|
|
*/
|
|
private static function removeImplicitMentionsFromBody($body, array $implicit_mentions)
|
|
{
|
|
$kept_mentions = [];
|
|
|
|
// Extract one prepended mention at a time from the body
|
|
while(preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#mi', $body, $matches)) {
|
|
if (!in_array($matches[2], $implicit_mentions) ) {
|
|
$kept_mentions[] = $matches[1];
|
|
}
|
|
|
|
$body = $matches[3];
|
|
}
|
|
|
|
// Re-appending the kept mentions to the body after extraction
|
|
$kept_mentions[] = $body;
|
|
|
|
return implode('', $kept_mentions);
|
|
}
|
|
}
|