friendica/src/Model/APContact.php

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<?php
/**
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* @copyright Copyright (C) 2010-2022, the Friendica project
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*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
namespace Friendica\Model;
use Friendica\Content\Text\HTML;
use Friendica\Core\Cache\Enum\Duration;
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use Friendica\Core\Logger;
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use Friendica\Core\Protocol;
use Friendica\Core\System;
use Friendica\Database\DBA;
use Friendica\DI;
use Friendica\Model\Item;
use Friendica\Network\HTTPClient\Client\HttpClientAccept;
use Friendica\Network\HTTPException;
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use Friendica\Network\Probe;
use Friendica\Protocol\ActivityNamespace;
use Friendica\Protocol\ActivityPub;
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use Friendica\Protocol\ActivityPub\Transmitter;
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use Friendica\Util\Crypto;
use Friendica\Util\DateTimeFormat;
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use Friendica\Util\HTTPSignature;
use Friendica\Util\JsonLD;
use Friendica\Util\Network;
use GuzzleHttp\Psr7\Uri;
class APContact
{
/**
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* Fetch webfinger data
*
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* @param string $addr Address
* @return array webfinger data
*/
private static function fetchWebfingerData(string $addr): array
{
$addr_parts = explode('@', $addr);
if (count($addr_parts) != 2) {
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return [];
}
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if (Contact::isLocal($addr) && ($local_uid = User::getIdForURL($addr)) && ($local_owner = User::getOwnerDataById($local_uid))) {
$data = [
'addr' => $local_owner['addr'],
'baseurl' => $local_owner['baseurl'],
'url' => $local_owner['url'],
'subscribe' => $local_owner['baseurl'] . '/follow?url={uri}'];
if (!empty($local_owner['alias']) && ($local_owner['url'] != $local_owner['alias'])) {
$data['alias'] = $local_owner['alias'];
}
return $data;
}
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$data = ['addr' => $addr];
$template = 'https://' . $addr_parts[1] . '/.well-known/webfinger?resource=acct:' . urlencode($addr);
$webfinger = Probe::webfinger(str_replace('{uri}', urlencode($addr), $template), HttpClientAccept::JRD_JSON);
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if (empty($webfinger['links'])) {
$template = 'http://' . $addr_parts[1] . '/.well-known/webfinger?resource=acct:' . urlencode($addr);
$webfinger = Probe::webfinger(str_replace('{uri}', urlencode($addr), $template), HttpClientAccept::JRD_JSON);
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if (empty($webfinger['links'])) {
return [];
}
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$data['baseurl'] = 'http://' . $addr_parts[1];
} else {
$data['baseurl'] = 'https://' . $addr_parts[1];
}
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foreach ($webfinger['links'] as $link) {
if (empty($link['rel'])) {
continue;
}
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if (!empty($link['template']) && ($link['rel'] == ActivityNamespace::OSTATUSSUB)) {
$data['subscribe'] = $link['template'];
}
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if (!empty($link['href']) && !empty($link['type']) && ($link['rel'] == 'self') && ($link['type'] == 'application/activity+json')) {
$data['url'] = $link['href'];
}
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if (!empty($link['href']) && !empty($link['type']) && ($link['rel'] == 'http://webfinger.net/rel/profile-page') && ($link['type'] == 'text/html')) {
$data['alias'] = $link['href'];
}
}
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if (!empty($data['url']) && !empty($data['alias']) && ($data['url'] == $data['alias'])) {
unset($data['alias']);
}
return $data;
}
/**
* Fetches a profile from a given url
*
* @param string $url profile url
* @param boolean $update true = always update, false = never update, null = update when not found or outdated
* @return array profile array
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
* @todo Rewrite parameter $update to avoid true|false|null (boolean is binary, null adds a third case)
*/
public static function getByURL(string $url, $update = null): array
{
if (empty($url) || Network::isUrlBlocked($url)) {
Logger::info('Domain is blocked', ['url' => $url]);
return [];
}
$fetched_contact = [];
if (empty($update)) {
if (is_null($update)) {
$ref_update = DateTimeFormat::utc('now - 1 month');
} else {
$ref_update = DBA::NULL_DATETIME;
}
$apcontact = DBA::selectFirst('apcontact', [], ['url' => $url]);
if (!DBA::isResult($apcontact)) {
$apcontact = DBA::selectFirst('apcontact', [], ['alias' => $url]);
}
if (!DBA::isResult($apcontact)) {
$apcontact = DBA::selectFirst('apcontact', [], ['addr' => $url]);
}
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if (DBA::isResult($apcontact) && ($apcontact['updated'] > $ref_update) && !empty($apcontact['pubkey']) && !empty($apcontact['uri-id'])) {
return $apcontact;
}
if (!is_null($update)) {
return DBA::isResult($apcontact) ? $apcontact : [];
}
if (DBA::isResult($apcontact)) {
$fetched_contact = $apcontact;
}
}
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$apcontact = [];
$webfinger = empty(parse_url($url, PHP_URL_SCHEME));
if ($webfinger) {
$apcontact = self::fetchWebfingerData($url);
if (empty($apcontact['url'])) {
return $fetched_contact;
}
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$url = $apcontact['url'];
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} elseif (empty(parse_url($url, PHP_URL_PATH))) {
$apcontact['baseurl'] = $url;
}
// Detect multiple fast repeating request to the same address
// See https://github.com/friendica/friendica/issues/9303
$cachekey = 'apcontact:' . ItemURI::getIdByURI($url);
$result = DI::cache()->get($cachekey);
if (!is_null($result)) {
Logger::notice('Multiple requests for the address', ['url' => $url, 'update' => $update, 'callstack' => System::callstack(20), 'result' => $result]);
if (!empty($fetched_contact)) {
return $fetched_contact;
}
} else {
DI::cache()->set($cachekey, System::callstack(20), Duration::FIVE_MINUTES);
}
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if (Network::isLocalLink($url) && ($local_uid = User::getIdForURL($url))) {
try {
$data = Transmitter::getProfile($local_uid);
$local_owner = User::getOwnerDataById($local_uid);
} catch(HTTPException\NotFoundException $e) {
$data = null;
}
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}
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if (empty($data)) {
$local_owner = [];
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$curlResult = HTTPSignature::fetchRaw($url);
$failed = empty($curlResult) || empty($curlResult->getBody()) ||
(!$curlResult->isSuccess() && ($curlResult->getReturnCode() != 410));
if (!$failed) {
$data = json_decode($curlResult->getBody(), true);
$failed = empty($data) || !is_array($data);
}
if (!$failed && ($curlResult->getReturnCode() == 410)) {
$data = ['@context' => ActivityPub::CONTEXT, 'id' => $url, 'type' => 'Tombstone'];
}
if ($failed) {
self::markForArchival($fetched_contact ?: []);
return $fetched_contact;
}
}
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$compacted = JsonLD::compact($data);
if (empty($compacted['@id'])) {
return $fetched_contact;
}
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$apcontact['url'] = $compacted['@id'];
$apcontact['uuid'] = JsonLD::fetchElement($compacted, 'diaspora:guid', '@value');
$apcontact['type'] = str_replace('as:', '', JsonLD::fetchElement($compacted, '@type'));
$apcontact['following'] = JsonLD::fetchElement($compacted, 'as:following', '@id');
$apcontact['followers'] = JsonLD::fetchElement($compacted, 'as:followers', '@id');
$apcontact['inbox'] = (JsonLD::fetchElement($compacted, 'ldp:inbox', '@id') ?? '');
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self::unarchiveInbox($apcontact['inbox'], false);
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$apcontact['outbox'] = JsonLD::fetchElement($compacted, 'as:outbox', '@id');
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$apcontact['sharedinbox'] = '';
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if (!empty($compacted['as:endpoints'])) {
$apcontact['sharedinbox'] = (JsonLD::fetchElement($compacted['as:endpoints'], 'as:sharedInbox', '@id') ?? '');
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self::unarchiveInbox($apcontact['sharedinbox'], true);
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}
$apcontact['featured'] = JsonLD::fetchElement($compacted, 'toot:featured', '@id');
$apcontact['featured-tags'] = JsonLD::fetchElement($compacted, 'toot:featuredTags', '@id');
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$apcontact['nick'] = JsonLD::fetchElement($compacted, 'as:preferredUsername', '@value') ?? '';
$apcontact['name'] = JsonLD::fetchElement($compacted, 'as:name', '@value');
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if (empty($apcontact['name'])) {
$apcontact['name'] = $apcontact['nick'];
}
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$apcontact['about'] = HTML::toBBCode(JsonLD::fetchElement($compacted, 'as:summary', '@value') ?? '');
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$ims = JsonLD::fetchElementArray($compacted, 'vcard:hasInstantMessage');
if (!empty($ims)) {
foreach ($ims as $link) {
if (substr($link, 0, 5) == 'xmpp:') {
$apcontact['xmpp'] = substr($link, 5);
}
if (substr($link, 0, 7) == 'matrix:') {
$apcontact['matrix'] = substr($link, 7);
}
}
}
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$apcontact['photo'] = JsonLD::fetchElement($compacted, 'as:icon', '@id');
if (is_array($apcontact['photo']) || !empty($compacted['as:icon']['as:url']['@id'])) {
$apcontact['photo'] = JsonLD::fetchElement($compacted['as:icon'], 'as:url', '@id');
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}
$apcontact['header'] = JsonLD::fetchElement($compacted, 'as:image', '@id');
if (is_array($apcontact['header']) || !empty($compacted['as:image']['as:url']['@id'])) {
$apcontact['header'] = JsonLD::fetchElement($compacted['as:image'], 'as:url', '@id');
}
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if (empty($apcontact['alias'])) {
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$apcontact['alias'] = JsonLD::fetchElement($compacted, 'as:url', '@id');
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if (is_array($apcontact['alias'])) {
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$apcontact['alias'] = JsonLD::fetchElement($compacted['as:url'], 'as:href', '@id');
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}
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}
// Quit if none of the basic values are set
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if (empty($apcontact['url']) || empty($apcontact['type']) || (($apcontact['type'] != 'Tombstone') && empty($apcontact['inbox']))) {
return $fetched_contact;
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} elseif ($apcontact['type'] == 'Tombstone') {
// The "inbox" field must have a content
$apcontact['inbox'] = '';
}
// Quit if this doesn't seem to be an account at all
if (!in_array($apcontact['type'], ActivityPub::ACCOUNT_TYPES)) {
return $fetched_contact;
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}
$parts = parse_url($apcontact['url']);
unset($parts['scheme']);
unset($parts['path']);
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if (empty($apcontact['addr'])) {
if (!empty($apcontact['nick']) && is_array($parts)) {
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$apcontact['addr'] = $apcontact['nick'] . '@' . str_replace('//', '', Network::unparseURL($parts));
} else {
$apcontact['addr'] = '';
}
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}
$apcontact['pubkey'] = null;
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if (!empty($compacted['w3id:publicKey'])) {
$apcontact['pubkey'] = trim(JsonLD::fetchElement($compacted['w3id:publicKey'], 'w3id:publicKeyPem', '@value'));
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if (strstr($apcontact['pubkey'], 'RSA ')) {
$apcontact['pubkey'] = Crypto::rsaToPem($apcontact['pubkey']);
}
}
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$apcontact['manually-approve'] = (int)JsonLD::fetchElement($compacted, 'as:manuallyApprovesFollowers');
$apcontact['suspended'] = (int)JsonLD::fetchElement($compacted, 'toot:suspended');
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if (!empty($compacted['as:generator'])) {
$apcontact['baseurl'] = JsonLD::fetchElement($compacted['as:generator'], 'as:url', '@id');
$apcontact['generator'] = JsonLD::fetchElement($compacted['as:generator'], 'as:name', '@value');
}
if (!empty($apcontact['following'])) {
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if (!empty($local_owner)) {
$following = ActivityPub\Transmitter::getContacts($local_owner, [Contact::SHARING, Contact::FRIEND], 'following');
} else {
$following = ActivityPub::fetchContent($apcontact['following']);
}
if (!empty($following['totalItems'])) {
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// Mastodon seriously allows for this condition?
// Jul 14 2021 - See https://mastodon.social/@BLUW for a negative following count
if ($following['totalItems'] < 0) {
$following['totalItems'] = 0;
}
$apcontact['following_count'] = $following['totalItems'];
}
}
if (!empty($apcontact['followers'])) {
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if (!empty($local_owner)) {
$followers = ActivityPub\Transmitter::getContacts($local_owner, [Contact::FOLLOWER, Contact::FRIEND], 'followers');
} else {
$followers = ActivityPub::fetchContent($apcontact['followers']);
}
if (!empty($followers['totalItems'])) {
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// Mastodon seriously allows for this condition?
// Jul 14 2021 - See https://mastodon.online/@goes11 for a negative followers count
if ($followers['totalItems'] < 0) {
$followers['totalItems'] = 0;
}
$apcontact['followers_count'] = $followers['totalItems'];
}
}
if (!empty($apcontact['outbox'])) {
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if (!empty($local_owner)) {
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$statuses_count = self::getStatusesCount($local_owner);
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} else {
$outbox = ActivityPub::fetchContent($apcontact['outbox']);
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$statuses_count = $outbox['totalItems'] ?? 0;
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}
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if (!empty($statuses_count)) {
// Mastodon seriously allows for this condition?
// Jul 20 2021 - See https://chaos.social/@m11 for a negative posts count
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if ($statuses_count < 0) {
$statuses_count = 0;
}
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$apcontact['statuses_count'] = $statuses_count;
}
}
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$apcontact['discoverable'] = JsonLD::fetchElement($compacted, 'toot:discoverable', '@value');
// To-Do
// Unhandled
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// tag, attachment, image, nomadicLocations, signature, movedTo, liked
// Unhandled from Misskey
// sharedInbox, isCat
// Unhandled from Kroeg
// kroeg:blocks, updated
// When the photo is too large, try to shorten it by removing parts
if (strlen($apcontact['photo']) > 255) {
$parts = parse_url($apcontact['photo']);
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unset($parts['fragment']);
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$apcontact['photo'] = (string)Uri::fromParts($parts);
if (strlen($apcontact['photo']) > 255) {
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unset($parts['query']);
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$apcontact['photo'] = (string)Uri::fromParts($parts);
}
if (strlen($apcontact['photo']) > 255) {
$apcontact['photo'] = substr($apcontact['photo'], 0, 255);
}
}
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if (!$webfinger && !empty($apcontact['addr'])) {
$data = self::fetchWebfingerData($apcontact['addr']);
if (!empty($data)) {
$apcontact['baseurl'] = $data['baseurl'];
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if (empty($apcontact['alias']) && !empty($data['alias'])) {
$apcontact['alias'] = $data['alias'];
}
if (!empty($data['subscribe'])) {
$apcontact['subscribe'] = $data['subscribe'];
}
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} else {
$apcontact['addr'] = null;
}
}
if (empty($apcontact['baseurl'])) {
$apcontact['baseurl'] = null;
}
if (empty($apcontact['subscribe'])) {
$apcontact['subscribe'] = null;
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}
if (!empty($apcontact['baseurl']) && empty($fetched_contact['gsid'])) {
$apcontact['gsid'] = GServer::getID($apcontact['baseurl']);
} elseif (!empty($fetched_contact['gsid'])) {
$apcontact['gsid'] = $fetched_contact['gsid'];
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} else {
$apcontact['gsid'] = null;
}
if ($apcontact['url'] == $apcontact['alias']) {
$apcontact['alias'] = null;
}
if (empty($apcontact['uuid'])) {
$apcontact['uri-id'] = ItemURI::getIdByURI($apcontact['url']);
} else {
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$apcontact['uri-id'] = ItemURI::insert(['uri' => $apcontact['url'], 'guid' => $apcontact['uuid']]);
}
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foreach (APContact\Endpoint::ENDPOINT_NAMES as $type => $name) {
$value = JsonLD::fetchElement($compacted, $name, '@id');
if (empty($value)) {
continue;
}
APContact\Endpoint::update($apcontact['uri-id'], $type, $value);
}
if (!empty($compacted['as:endpoints'])) {
foreach ($compacted['as:endpoints'] as $name => $endpoint) {
if (empty($endpoint['@id']) || !is_string($endpoint['@id'])) {
continue;
}
if (in_array($name, APContact\Endpoint::ENDPOINT_NAMES)) {
$key = array_search($name, APContact\Endpoint::ENDPOINT_NAMES);
APContact\Endpoint::update($apcontact['uri-id'], $key, $endpoint['@id']);
Logger::debug('Store endpoint', ['key' => $key, 'name' => $name, 'endpoint' => $endpoint['@id']]);
} elseif (!in_array($name, ['as:sharedInbox', 'as:uploadMedia', 'as:oauthTokenEndpoint', 'as:oauthAuthorizationEndpoint', 'litepub:oauthRegistrationEndpoint'])) {
Logger::debug('Unknown endpoint', ['name' => $name, 'endpoint' => $endpoint['@id']]);
}
}
}
$apcontact['updated'] = DateTimeFormat::utcNow();
// We delete the old entry when the URL is changed
if ($url != $apcontact['url']) {
Logger::info('Delete changed profile url', ['old' => $url, 'new' => $apcontact['url']]);
DBA::delete('apcontact', ['url' => $url]);
}
// Limit the length on incoming fields
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$apcontact = DI::dbaDefinition()->truncateFieldsForTable('apcontact', $apcontact);
if (DBA::exists('apcontact', ['url' => $apcontact['url']])) {
DBA::update('apcontact', $apcontact, ['url' => $apcontact['url']]);
} else {
DBA::replace('apcontact', $apcontact);
}
Logger::info('Updated profile', ['url' => $url]);
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return DBA::selectFirst('apcontact', [], ['url' => $apcontact['url']]) ?: [];
}
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/**
* Fetch the number of statuses for the given owner
*
* @param array $owner
*
* @return integer
*/
private static function getStatusesCount(array $owner): int
{
$condition = [
'private' => [Item::PUBLIC, Item::UNLISTED],
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'author-id' => Contact::getIdForURL($owner['url'], 0, false),
'gravity' => [Item::GRAVITY_PARENT, Item::GRAVITY_COMMENT],
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'network' => Protocol::DFRN,
'parent-network' => Protocol::FEDERATED,
'deleted' => false,
'visible' => true,
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];
$count = Post::countPosts($condition);
return $count;
}
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/**
* Mark the given AP Contact as "to archive"
*
* @param array $apcontact
* @return void
*/
public static function markForArchival(array $apcontact)
{
if (!empty($apcontact['inbox'])) {
Logger::info('Set inbox status to failure', ['inbox' => $apcontact['inbox']]);
HTTPSignature::setInboxStatus($apcontact['inbox'], false);
}
if (!empty($apcontact['sharedinbox'])) {
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// Check if there are any available inboxes
$available = DBA::exists('apcontact', ["`sharedinbox` = ? AnD `inbox` IN (SELECT `url` FROM `inbox-status` WHERE `success` > `failure`)",
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$apcontact['sharedinbox']]);
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if (!$available) {
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// If all known personal inboxes are failing then set their shared inbox to failure as well
Logger::info('Set shared inbox status to failure', ['sharedinbox' => $apcontact['sharedinbox']]);
HTTPSignature::setInboxStatus($apcontact['sharedinbox'], false, true);
}
}
}
/**
* Unmark the given AP Contact as "to archive"
*
* @param array $apcontact
* @return void
*/
public static function unmarkForArchival(array $apcontact)
{
if (!empty($apcontact['inbox'])) {
Logger::info('Set inbox status to success', ['inbox' => $apcontact['inbox']]);
HTTPSignature::setInboxStatus($apcontact['inbox'], true);
}
if (!empty($apcontact['sharedinbox'])) {
Logger::info('Set shared inbox status to success', ['sharedinbox' => $apcontact['sharedinbox']]);
HTTPSignature::setInboxStatus($apcontact['sharedinbox'], true, true);
}
}
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/**
* Unarchive inboxes
*
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* @param string $url inbox url
* @param boolean $shared Shared Inbox
* @return void
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*/
private static function unarchiveInbox(string $url, bool $shared)
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{
if (empty($url)) {
return;
}
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HTTPSignature::setInboxStatus($url, true, $shared);
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}
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/**
* Check if the apcontact is a relay account
*
* @param array $apcontact
*
* @return bool
*/
public static function isRelay(array $apcontact): bool
{
if (empty($apcontact['nick']) || $apcontact['nick'] != 'relay') {
return false;
}
if (!empty($apcontact['type']) && $apcontact['type'] == 'Application') {
return true;
}
if (!empty($apcontact['type']) && in_array($apcontact['type'], ['Group', 'Service']) && is_null($apcontact['outbox'])) {
return true;
}
return false;
}
}