Login

import java.util.Scanner;

public class AdminInterface {
    public static void main(String[] args) {

        adminInterface();
    }
    private static void adminInterface() {

        String employees;
        String username;
        String password;
        int menuItem;

        boolean quit = false; // IS NEEDED AS THE BOOLEAN OUTSIDE OF THIS METHOD CAN'T BE ACCESSED
        do {
            System.out.println(" ");
            System.out.println("********************** ADMIN INTERFACE *********************");
            System.out.println(" ");
            System.out.println("1: Add Employee");
            System.out.println("2: Delete Employee:");
            System.out.println("0. Go back to Log In Screen");
            System.out.print("Choose menu number: ");
            menuItem = validateIntInput(); // CHECKS IF THE INPUT IS INDEED AN VALID INT TYPE
            System.out.println(" ");
            System.out.println("**********************************************************");
            System.out.println(" ");

            Scanner name = new Scanner(System.in);
            Scanner password1 = new Scanner(System.in);

            switch (menuItem) {
                case 1:
                    System.out.println("Enter employees name");
                    employees = name.next();
                    System.out.println("Enter Password");
                    password =  password1.next();
                    DB.insertSQL("INSERT INTO tblLogin (fldUsername , fldPassword) VALUES  ('"+employees +"' , '"+password +"')");
                    //CODE THAT WILL ADD EMPLOYEE FROM DATABASE
                    break;

                case 2:
                    System.out.println("Enter employees name");
                    username = name.next();
                    System.out.println("username" + username);
                    boolean ok = false;
                    ok = DB.deleteSQL("DELETE FROM tblLogin WHERE fldUsername = '"+username+"'");
                    System.out.println("System is ok" + ok);
                    //CODE THAT WILL DELETE EMPLOYEE FROM DATABASE
                    break;

                case 0:
                    quit = true; // BREAKS THE LOOP WHICH LEADS US BACK ONE-STEP IN THE MENU
                    System.out.println("Going back!");
                    break;

                default: // INVALID INPUTS RECEIVES THIS MESSAGE
                    System.out.println("Invalid choice. Try again:");
            }
        } while (!quit);
    }

    private static int validateIntInput() {
        // VALIDATES IF THE INPUT IS AN INT
        Scanner input = new Scanner(System.in);
        while (true) {
            try {
                int a = input.nextInt();
                if (a == 0) {
                    return 0;
                } else {
                    return a;
                }
            } catch (java.util.InputMismatchException e) {
                System.out.println("You didn't enter a number - Try again: ");
                input.nextLine();
            }
        }
    }
}