Laravel validation rule to check if a business ID (organisasjonsnummer) is valid against the national registry

ValidNorwegianOrganisation.php

<?php

namespace App\Rules;

use Illuminate\Contracts\Validation\Rule;
use Illuminate\Support\Facades\Http;

class ValidNorwegianOrganisation implements Rule
{
    /**
     * Variable to store error message
     */
    protected $message;

    /**
     * Create a new rule instance.
     *
     * @return void
     */
    public function __construct()
    {
        //
    }

    /**
     * Determine if the validation rule passes.
     *
     * @param  string  $attribute
     * @param  mixed  $value
     * @return bool
     */
    public function passes($attribute, $value)
    {
        if (strlen($value) == 9 && is_numeric($value)) {
            $response = Http::get('https://data.brreg.no/enhetsregisteret/api/enheter/' . $value);

            if ($response->successful()) {
                //Process the request from BRREG, if there is a business set all is probaly good
                if ((isset($response->json()["navn"]))) {
                    return true;
                } else {
                    $this->message = "Brønnøysundregistrene returnerte et uventet resultat";
                    return false;
                }
            } elseif ($response->clientError()) {
                //Request to BRREG failed due to a network, server or similar error
                $this->message = "Fant ingen bedrift med organisasjonsnummer " . $value;
                return false;
            } else {
                //Request to BRREG failed due to a network, server or similar error
                $this->message = "Feil: Forespørselen mot Brønnøysundregistrene feilet";
                return false;
            }
        } else {
            //Failed basic validation
            $this->message = "Organisasjonsnummeret må være 9 siffer uten mellomrom";
            return false;
        }
    }

    /**
     * Get the validation error message.
     *
     * @return string
     */
    public function message()
    {
        return $this->message;
    }
}