sfp_api_laravel_ginastica_cerebro/app/Casts/CnpjCast.php

<?php

namespace App\Casts;

use App\ValueObjects\Cnpj;
use Illuminate\Contracts\Database\Eloquent\CastsAttributes;
use Illuminate\Database\Eloquent\Model;

class CnpjCast implements CastsAttributes
{
    public function get(Model $model, string $key, mixed $value, array $attributes): ?Cnpj
    {
        return $value === null ? null : new Cnpj((string) $value);
    }

    public function set(Model $model, string $key, mixed $value, array $attributes): ?string
    {
        if ($value === null) {
            return null;
        }

        return ($value instanceof Cnpj ? $value : new Cnpj((string) $value))->value();
    }
}