invoiceninja/app/Factory/ClientFactory.php

<?php

namespace App\Factory;

use App\DataMapper\ClientSettings;
use App\Models\Client;

class ClientFactory
{
	public static function create(int $company_id, int $user_id) :Client
	{
		$client = new Client;
		$client->company_id = $company_id;
		$client->user_id = $user_id;
		$client->name = '';
		$client->website = '';
		$client->private_notes = '';
		$client->balance = 0;
		$client->paid_to_date = 0;
		$client->country_id = 4;
		$client->is_deleted = 0;
		$client->settings = new ClientSettings(ClientSettings::defaults());
		
		$client_contact = ClientContactFactory::create($company_id, $user_id);
        $client->contacts->add($client_contact);

		return $client;
	}
}