match.rs

pub fn check_user_meter_number() {
    let mut customer_option: String = String::new();

    println!("Are you a new customer or an existing customer: ");
    println!("1. Yes");
    println!("2. No");

    stdin()
        .read_line(&mut customer_option)
        .expect("Not a valid selection");

    match customer_option.trim().parse::<u8>() {
        Ok(option) => {
            match option {
                1 => {
                    // prompt user to input meter number
                    let mut folder_name: String = String::new();
                    println!("Great! Please enter your meter number: ");

                    stdin()
                        .read_line(&mut folder_name)
                        .expect("Not a valid selection");

                    let result = check_directory_exists(folder_name.trim());

                    match result {
                        Ok(_) => {
                            match result {
                                Ok(_) => {
                                     get_print_main_menu(folder_name.trim());

                                    // concatenate the meter number with the generated receipt number
                                    // save
                                }
                                Err(e) => println!("{}", e),
                            }
                        },
                        Err(_) => print!("Meter number {} not found", folder_name),
                    }
                }
                2 => {
                    let mut choosen_option: String = String::new();

                    println!("Do you want to become a customer: ");
                    println!("1. Yes");
                    println!("2. No");

                    stdin()
                        .read_line(&mut choosen_option)
                        .expect("Not a valid selection");

                    match choosen_option.trim().parse::<u8>() {
                        Ok(current_option) => match current_option {
                            1 => {
                                let (_, generated_meter_number) = generate_random_receipt_numbers();
                                create_user_meter_number(generated_meter_number.to_string().trim());
                            }
                            2 => println!("Thank you for using visiting us and enjoy your day"),
                            _ => println!("The option select is not a valid selection")
                        },
                        Err(e) => println!("Invalid input {}", e),
                    }
                }
                _ => println!("Unknown option selected"),
            }
        }
        Err(e) => {
            println!("An error occured with provided receipt number, {}", e);
        }
    }
}