<?php

namespace Acme;

class DataTransfer
{
    public static function forUser(
        $user_id
    ) {
        return new static($user_id);
    }

    public static function forCompany(
        $company_id
    ) {
        return new static(null, $company_id);
    }

    private $user_id;
    private $company_id;

    public function userId()
    {
        return $this->user_id;
    }

    public function companyId()
    {
        return $this->company_id;
    }

    private function __construct(
        $user_id = null,
        $company_id = null
    ) {
        if ($user_id) {
            $this->user_id = $user_id;
        }

        if ($company_id) {
            $this->company_id = $company_id;
        }
    }
}