gistfile1.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ERConsole.Menu
{
    class MenuCollectionController
    {
        MenuCollection root;
        public MenuCollectionController (MenuCollection root) {
            this.root = root;
        }

        public void generate () {
            int count = root.getCount() + 1;
            for (int i = 1; i < count; i++)
            {
                Console.WriteLine(String.Format("{0}. {1}",i,this.root.getOptionDescription(i-1)));
            }
        }


        private void wrongInput () {
            Console.WriteLine("Something wrong with your input, try again!");
            this.interact();
        }
        private void newMenu(MenuCollection root)
        {
            this.root = root;
            if (this.root == null)
            {
                return;
            }
            else
            {
                this.generate();
                this.interact();
            }
        }
        private void selectItem(int i)
        {
            Console.WriteLine("Selected executed");
            MenuItem selectedItem = this.root.getMenuItem(i);
            if (selectedItem.subMenu == null)  // How can I overcome this by encapsulation ?
            {
                selectedItem.action();
                this.interact();
            }
            else
            {
                this.newMenu(selectedItem.subMenu);
            }
        }
        public void interact()
        {
            Console.Write("--->");
            string input = Console.ReadLine();
            Console.WriteLine("After reading");
            if (input == "q")
            {
                Console.WriteLine("It is q");
                this.newMenu(this.root.parent);
                return;
            }

            int itemNumber     = 0;
            try
            {
                itemNumber = int.Parse(input);
            }
            catch 
            {
                this.wrongInput();
                return;
            }

            itemNumber -= 1; // because interface
            if (itemNumber >= this.root.getCount() || itemNumber < 0)
            {
                this.wrongInput(); // MAKE INTERACTION WITH USER... SO IT WILL STILL BE IN THE CALL STACK
                return;
            }

            Console.WriteLine("Before select " + itemNumber);
            this.selectItem(itemNumber);
            
        }

        
    }
}