tighten/novapackages

trait HandlesPackageAuthorizationTrait
{
    protected function userIsAdminOrAuthorOrCollaboratorOrUnclaimedSubmitter($user, $package)
    {
        return $user->isAdmin()
            || $this->userIsPackageAuthor($user, $package)
            || $this->userIsPackageCollaborator($user, $package)
            || $this->userIsUnclaimedPackageSubmitter($user, $package);
    }
}

use App\Package;
use App\Policies\HandlesPackageAuthorizationTrait;

class PackagePolicy
{
    use HandlesPackageAuthorizationTrait;

    public function show(User $user, Package $package)
    {
        return $this->userIsAdminOrAuthorOrCollaboratorOrUnclaimedSubmitter($user, $package);
    }

    public function update(User $user, Package $package)
    {
        return $this->userIsAdminOrAuthorOrCollaboratorOrUnclaimedSubmitter($user, $package);
    }
}

use App\Policies\HandlesPackageAuthorizationTrait;
use App\Screenshot;
use App\User;

class ScreenshotPolicy
{
    use HandlesPackageAuthorizationTrait;

    public function delete(User $user, Screenshot $screenshot)
    {
        if ($screenshot->uploader->is($user)
            || ($screenshot->hasPackage() && $this->userIsAdminOrAuthorOrCollaboratorOrUnclaimedSubmitter($user, $screenshot->package))
        ) {
            return true;
        }

        return false;
    }
}