/// <summary>
/// <inheritdoc cref="ICashiersService.OnCustomerEnters"/>
/// </summary>
public void OnCustomerEnters(object sender, Customer customer)
{
Cashier cashier = getEmptiestOpenCashier();
if (cashier == null)
{
_lineService.CustomersLine.AddLineItem(customer);
Console.WriteLine($"The supermarket is close (no worker has checked-in).\n" +
$" Customer '{customer}' sent back to the line.\n");
return;
}
List <Product> randomProducts = ProductUtils.GenerateRandomProducts(_supermarketProducts);
cashier.Registers[customer] = randomProducts;
Console.WriteLine($"Customer '{customer}' has entered to the supermarket\n");
}