// Method which holds the interface for adding a customer to the crm file
public void NewCustomerSubmenu(bool clear = true)
{
if (clear)
{
Console.Clear();
}
Console.WriteLine("### New Customer Submenu ###\n");
Console.WriteLine("Please fill the following fields (fields with * are required)\n");
Console.Write("Title*: ");
title = StringToTitleCase(Console.ReadLine());
Console.Write("FirstName*: ");
firstName = StringToTitleCase(Console.ReadLine());
Console.Write("LastName*: ");
lastName = StringToTitleCase(Console.ReadLine());
GenderValidationInput();
DOBValidationInput();
// Determine the highest ID number in the list
int HighestID;
// if the list has any customer, we determine the max ID using the max method on the list of objects
if (Crm.CustomerList.Count() > 0)
{
HighestID = Crm.CustomerList.Max(Customer => Customer.ID);
}// If the list has no customers, we make the id to be -1, so when the first customer is added, it will
// increment by one, which will be 0 (-1 + 1 = 0).
else
{
HighestID = -1;
}
// The customer id number must be unqiue, so we will make it equal to the highest ID number in the crm list and
// increment it by one
int CustomerIDNumber = HighestID + 1;
// Add new customer
Customer newCustomer = new Customer(CustomerIDNumber, title, firstName, lastName, Gender, DOB);
if (Crm.AddCustomer(newCustomer))
{
Console.Write("\nSuccessfully created new customer '{0} - {1} {2} {3}' and added to customer list",
CustomerIDNumber, title, firstName, lastName);
Crm.SaveToFile();
}
// If user presses any key, prompt the end of the menu
LastMRRCscreen(() => SubMenu("Customer"), () => NewCustomerSubmenu());
}