Digitigrade/Policy/BlockInstance.php


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<?php
namespace Digitigrade\Policy;

use Digitigrade\Model\Actor;
use Digitigrade\Model\Instance;
use Digitigrade\Model\Interaction;
use Digitigrade\Model\Note;
use Digitigrade\Model\PushableModel;
use Digitigrade\Policy;

class BlockInstance extends Policy {
    /** @var string[] */
    private array $blockedHosts;

    public function __construct(string ...$hosts) {
        $this->blockedHosts = $hosts;
    }

    private function isBlocked(PushableModel|Instance|null $obj): bool {
        if ($obj == null) {
            return false;
        }
        $objHost = hostname_from_uri($obj instanceof Instance ? $obj->domain : $obj->uri);
        foreach ($this->blockedHosts as $host) {
            if (str_ends_with($objHost, $host)) {
                return true;
            }
        }
        return false;
    }

    public function checkActor(Actor $actor): bool {
        return !$this->isBlocked($actor);
    }
    public function checkInteraction(Interaction $interaction): bool {
        return !$this->isBlocked($interaction);
    }
    public function checkNote(Note $note): bool {
        return !$this->isBlocked($note);
    }

    public function checkActorFederation(Actor $actor, ?Instance $instance): bool {
        return !$this->isBlocked($instance);
    }
    public function checkInteractionFederation(Interaction $interaction, ?Instance $instance): bool {
        return !$this->isBlocked($instance);
    }
    public function checkNoteFederation(Note $note, ?Instance $instance): bool {
        return !$this->isBlocked($instance);
    }
}