110 lines
2.7 KiB
PHP
110 lines
2.7 KiB
PHP
<?php
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/**
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* @copyright 2021 Podlibre
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* @license https://www.gnu.org/licenses/agpl-3.0.en.html AGPL3
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* @link https://castopod.org/
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*/
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namespace ActivityPub;
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use Exception;
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class WebFinger
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{
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/**
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* @var string
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*/
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const RESOURCE_PATTERN = '/^acct:(?P<username>([\w_]+))@(?P<domain>([\w\-\.]+[\w]+)(:[\d]+)?)$/x';
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protected string $username;
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protected string $domain;
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protected string $host;
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protected string $port;
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/**
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* @var string[]
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*/
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protected array $aliases = [];
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/**
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* @var array<array<string, string>>
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*/
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protected array $links = [];
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public function __construct(protected string $subject)
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{
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// Split resource into its parts (username, domain)
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$parts = $this->splitResource($subject);
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if (!$parts) {
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throw new Exception('Wrong WebFinger resource pattern.');
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}
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$username = $parts['username'];
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$domain = $parts['domain'];
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$this->username = $username;
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$this->domain = $domain;
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$currentUrl = current_url(true);
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$currentDomain =
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$currentUrl->getHost() .
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($currentUrl->getPort() ? ':' . $currentUrl->getPort() : '');
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if ($currentDomain !== $domain) {
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// TODO: return error code
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throw new Exception('Domain does not correspond to Instance.');
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}
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if (
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!($actor = model('ActorModel')->getActorByUsername(
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$username,
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$domain,
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))
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) {
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throw new Exception('Could not find actor');
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}
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$this->aliases = [$actor->id];
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$this->links = [
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[
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'rel' => 'self',
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'type' => 'application/activity+json',
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'href' => $actor->uri,
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],
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[
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'rel' => 'http://webfinger.net/rel/profile-page',
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'type' => 'text/html',
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'href' => $actor->uri, # TODO: should there be 2 values? @actorUsername
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],
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];
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}
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/**
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* Get WebFinger response as an array
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*
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* @return array<string, array|string>
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*/
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public function toArray(): array
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{
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return [
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'subject' => $this->subject,
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'aliases' => $this->aliases,
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'links' => $this->links,
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];
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}
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/**
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* Split resource into its parts (username, domain)
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*
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* @return array<string, string>|false
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*/
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private function splitResource(string $resource): array|false
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{
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if (!preg_match(self::RESOURCE_PATTERN, $resource, $matches)) {
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// Resource pattern failed
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return false;
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}
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return $matches;
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}
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}
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