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<?php
namespace Digitigrade\Model;
use Digitigrade\Model;
class ActorWebfinger extends Model {
public const REL_URI = "https://pawpub.entities.org.uk/rel/actor.html";
public string $acct;
public Actor $actor;
protected function getUpdateWhereClause(\PDO $db): ?string {
if (self::findWhere('acct = ?', [$this->acct]) != null) {
return 'acct = ' . $db->quote($this->acct);
}
return null;
}
public static function findByAcct(string $acct, bool $autoSave = true, bool $forceRefetch = false): ?self {
if (!$forceRefetch) {
$entry = self::findWhere('acct = ?', [$acct]);
if ($entry != null)
return $entry;
}
// fetch from remote
$domain = explode('@', $acct, 2)[1];
$data = @file_get_contents("https://$domain/.well-known/webfinger?resource=$acct",
context: stream_context_create([
'http' => ['header' => 'Accept: application/jrd+json, application/json']
])
);
if ($data === false)
return null;
$data = json_decode($data);
if ($data === null)
return null;
// find the right link
if (!isset($data->links))
return null;
$matching = array_filter($data->links, function (\stdClass $linkObj) {
return $linkObj->rel == self::REL_URI;
});
if (count($matching) == 0)
return null;
$actor = Actor::findByUri($matching[0]->href, $autoSave, $forceRefetch);
// save and return
$entry = new self();
$entry->acct = $acct;
$entry->actor = $actor;
if ($autoSave)
$entry->save();
return $entry;
}
}
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