Friendica Communications Platform (please note that this is a clone of the repository at github, issues are handled there) https://friendi.ca
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<?php
/**
* @file src/Model/APContact.php
*/
namespace Friendica\Model;
use Friendica\Content\Text\HTML;
use Friendica\Core\Logger;
use Friendica\Core\Config;
use Friendica\Database\DBA;
use Friendica\Protocol\ActivityPub;
use Friendica\Util\Network;
use Friendica\Util\JsonLD;
use Friendica\Util\DateTimeFormat;
use Friendica\Util\Strings;
class APContact
{
/**
* Resolves the profile url from the address by using webfinger
*
* @param string $addr profile address (user@domain.tld)
* @param string $url profile URL. When set then we return "true" when this profile url can be found at the address
* @return string|boolean url
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
*/
private static function addrToUrl($addr, $url = null)
{
$addr_parts = explode('@', $addr);
if (count($addr_parts) != 2) {
return false;
}
$xrd_timeout = Config::get('system', 'xrd_timeout');
$webfinger = 'https://' . $addr_parts[1] . '/.well-known/webfinger?resource=acct:' . urlencode($addr);
$curlResult = Network::curl($webfinger, false, ['timeout' => $xrd_timeout, 'accept_content' => 'application/jrd+json,application/json']);
if (!$curlResult->isSuccess() || empty($curlResult->getBody())) {
$webfinger = Strings::normaliseLink($webfinger);
$curlResult = Network::curl($webfinger, false, ['timeout' => $xrd_timeout, 'accept_content' => 'application/jrd+json,application/json']);
if (!$curlResult->isSuccess() || empty($curlResult->getBody())) {
return false;
}
}
$data = json_decode($curlResult->getBody(), true);
if (empty($data['links'])) {
return false;
}
foreach ($data['links'] as $link) {
if (!empty($url) && !empty($link['href']) && ($link['href'] == $url)) {
return true;
}
if (empty($link['href']) || empty($link['rel']) || empty($link['type'])) {
continue;
}
if (empty($url) && ($link['rel'] == 'self') && ($link['type'] == 'application/activity+json')) {
return $link['href'];
}
}
return false;
}
/**
* Fetches a profile from a given url
*
* @param string $url profile url
* @param boolean $update true = always update, false = never update, null = update when not found or outdated
* @return array profile array
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
public static function getByURL($url, $update = null)
{
if (empty($url)) {
return [];
}
$fetched_contact = false;
if (empty($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' => $url]);
}
if (DBA::isResult($apcontact) && ($apcontact['updated'] > $ref_update) && !empty($apcontact['pubkey'])) {
return $apcontact;
}
if (!is_null($update)) {
return DBA::isResult($apcontact) ? $apcontact : [];
}
if (DBA::isResult($apcontact)) {
$fetched_contact = $apcontact;
}
}
if (empty(parse_url($url, PHP_URL_SCHEME))) {
$url = self::addrToUrl($url);
if (empty($url)) {
return $fetched_contact;
}
}
$data = ActivityPub::fetchContent($url);
if (empty($data)) {
return $fetched_contact;
}
$compacted = JsonLD::compact($data);
if (empty($compacted['@id'])) {
return $fetched_contact;
}
$apcontact = [];
$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');
self::unarchiveInbox($apcontact['inbox'], false);
$apcontact['outbox'] = JsonLD::fetchElement($compacted, 'as:outbox', '@id');
$apcontact['sharedinbox'] = '';
if (!empty($compacted['as:endpoints'])) {
$apcontact['sharedinbox'] = JsonLD::fetchElement($compacted['as:endpoints'], 'as:sharedInbox', '@id');
self::unarchiveInbox($apcontact['sharedinbox'], true);
}
$apcontact['nick'] = JsonLD::fetchElement($compacted, 'as:preferredUsername', '@value') ?? '';
$apcontact['name'] = JsonLD::fetchElement($compacted, 'as:name', '@value');
if (empty($apcontact['name'])) {
$apcontact['name'] = $apcontact['nick'];
}
$apcontact['about'] = HTML::toBBCode(JsonLD::fetchElement($compacted, 'as:summary', '@value'));
$apcontact['photo'] = JsonLD::fetchElement($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');
}
$apcontact['alias'] = JsonLD::fetchElement($compacted, 'as:url', '@id');
if (is_array($apcontact['alias'])) {
$apcontact['alias'] = JsonLD::fetchElement($compacted['as:url'], 'as:href', '@id');
}
// Quit if none of the basic values are set
if (empty($apcontact['url']) || empty($apcontact['inbox']) || empty($apcontact['type'])) {
return $fetched_contact;
}
// Quit if this doesn't seem to be an account at all
if (!in_array($apcontact['type'], ActivityPub::ACCOUNT_TYPES)) {
return $fetched_contact;
}
$parts = parse_url($apcontact['url']);
unset($parts['scheme']);
unset($parts['path']);
if (!empty($apcontact['nick'])) {
$apcontact['addr'] = $apcontact['nick'] . '@' . str_replace('//', '', Network::unparseURL($parts));
} else {
$apcontact['addr'] = '';
}
$apcontact['pubkey'] = null;
if (!empty($compacted['w3id:publicKey'])) {
$apcontact['pubkey'] = trim(JsonLD::fetchElement($compacted['w3id:publicKey'], 'w3id:publicKeyPem', '@value'));
}
$apcontact['manually-approve'] = (int)JsonLD::fetchElement($compacted, 'as:manuallyApprovesFollowers');
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'])) {
$data = ActivityPub::fetchContent($apcontact['following']);
if (!empty($data)) {
if (!empty($data['totalItems'])) {
$apcontact['following_count'] = $data['totalItems'];
}
}
}
if (!empty($apcontact['followers'])) {
$data = ActivityPub::fetchContent($apcontact['followers']);
if (!empty($data)) {
if (!empty($data['totalItems'])) {
$apcontact['followers_count'] = $data['totalItems'];
}
}
}
if (!empty($apcontact['outbox'])) {
$data = ActivityPub::fetchContent($apcontact['outbox']);
if (!empty($data)) {
if (!empty($data['totalItems'])) {
$apcontact['statuses_count'] = $data['totalItems'];
}
}
}
// To-Do
// Unhandled
// tag, attachment, image, nomadicLocations, signature, featured, movedTo, liked
// Unhandled from Misskey
// sharedInbox, isCat
// Unhandled from Kroeg
// kroeg:blocks, updated
$parts = parse_url($apcontact['url']);
unset($parts['path']);
$baseurl = Network::unparseURL($parts);
// Check if the address is resolvable or the profile url is identical with the base url of the system
if (self::addrToUrl($apcontact['addr'], $apcontact['url']) || Strings::compareLink($apcontact['url'], $baseurl)) {
$apcontact['baseurl'] = $baseurl;
} else {
$apcontact['addr'] = null;
}
if (empty($apcontact['baseurl'])) {
$apcontact['baseurl'] = null;
}
if ($apcontact['url'] == $apcontact['alias']) {
$apcontact['alias'] = null;
}
$apcontact['updated'] = DateTimeFormat::utcNow();
DBA::update('apcontact', $apcontact, ['url' => $url], true);
// We delete the old entry when the URL is changed
if (($url != $apcontact['url']) && DBA::exists('apcontact', ['url' => $url]) && DBA::exists('apcontact', ['url' => $apcontact['url']])) {
DBA::delete('apcontact', ['url' => $url]);
}
Logger::log('Updated profile for ' . $url, Logger::DEBUG);
return $apcontact;
}
/**
* Unarchive inboxes
*
* @param string $url inbox url
*/
private static function unarchiveInbox($url, $shared)
{
if (empty($url)) {
return;
}
$now = DateTimeFormat::utcNow();
$fields = ['archive' => false, 'success' => $now, 'shared' => $shared];
if (!DBA::exists('inbox-status', ['url' => $url])) {
$fields = array_merge($fields, ['url' => $url, 'created' => $now]);
DBA::insert('inbox-status', $fields);
} else {
DBA::update('inbox-status', $fields, ['url' => $url]);
}
}
}