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<?php
namespace Digitigrade;
use Digitigrade\HttpResponseStatus\PolicyRejected;
use Digitigrade\Model\Actor;
use Digitigrade\Model\FetchableModel;
use Digitigrade\Model\Instance;
use Digitigrade\Model\Interaction;
use Digitigrade\Model\Note;
class PolicyManager extends Singleton {
/** @var Policy[] */
private array $policies = [];
public function register(Policy $policy) {
$this->policies[] = $policy;
}
public function registerAll(Policy ...$policies) {
foreach ($policies as $p) {
$this->register($p);
}
}
/**
* Checks if an object is allowed by all policies and possibly alters it.
* @param FetchableModel $object the object to check (may be modified in-place)
* @return bool true if allowed, false if it should be dropped
*/
public function check(FetchableModel $object): bool {
return match ($object::class) {
Actor::class => self::arrayAll($this->policies, fn(Policy $p) => $p->checkActor($object)),
Interaction::class => self::arrayAll($this->policies, fn(Policy $p) => $p->checkInteraction($object)),
Note::class => self::arrayAll($this->policies, fn(Policy $p) => $p->checkNote($object)),
default => true
};
}
public function checkOrThrow(FetchableModel $object) {
if (!$this->check($object)) {
throw new PolicyRejected();
}
}
/**
* Checks if an object is allowed to be sent to a certain Instance by all
* policies, and possibly alters it.
* @param FetchableModel $object the object to check (may be modified in-place)
* @param ?Instance $instance the instance it's being sent to (may be null if unknown)
* @return bool true if allowed, false if the request should be cancelled
*/
public function checkFederation(FetchableModel $object, ?Instance $instance): bool {
return match ($object::class) {
Actor::class => self::arrayAll($this->policies, fn(Policy $p) => $p->checkActorFederation($object, $instance)),
Interaction::class => self::arrayAll($this->policies, fn(Policy $p) => $p->checkInteractionFederation($object, $instance)),
Note::class => self::arrayAll($this->policies, fn(Policy $p) => $p->checkNoteFederation($object, $instance)),
default => true
};
}
public function checkFederationOrThrow(FetchableModel $object, ?Instance $instance) {
if (!$this->checkFederation($object, $instance)) {
throw new PolicyRejected();
}
}
private static function arrayAll(array $arr, callable $test): bool {
// i would use array_all but that's php 8.4+ only which i don't have lol
foreach ($arr as $item) {
if (!$test($item)) {
return false;
}
}
return true;
}
}
|
