class.ilWACSignedResourceStorage.php

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<?php

use ILIAS\ResourceStorage\Manager\Manager;
use ILIAS\ResourceStorage\Consumer\StreamAccess\StreamAccess;
use ILIAS\ResourceStorage\Identification\ResourceIdentification;
use ILIAS\ResourceStorage\StorageHandler\StorageHandlerFactory;

class ilWACSignedResourceStorage implements ilWACCheckingClass
{
    private StreamAccess $stream_access;
    private StorageHandlerFactory $storage_handlers;
    private Manager $manager;

    public function __construct()
    {
        global $DIC;
        $this->stream_access = $DIC[InitResourceStorage::D_STREAM_ACCESS];
        $this->storage_handlers = $DIC[InitResourceStorage::D_STORAGE_HANDLERS];
        $this->manager = $DIC->resourceStorage()->manage();
    }

    public function canBeDelivered(ilWACPath $ilWACPath): bool
    {
        $token = $ilWACPath->getAppendix();
        $token = $this->stream_access->getTokenFactory()->check($token);
        $rid = $this->resolveRidFromStreamURI($token->resolveStream()->getMetadata('uri') ?? '');
        if ($rid === null) {
            return false;
        }

        $resource = $this->manager->getResource($rid);
        foreach ($resource->getStakeholders() as $stakeholder) {
            if ($stakeholder->canBeAccessedByCurrentUser($rid)) {
                return true;
            }
        }

        return false;
    }

    private function resolveRidFromStreamURI(string $uri): ?ResourceIdentification
    {
        return $this->storage_handlers->getRidForURI($uri);
    }
}