SoftwareEngineering2/winVCR/VCRlogic/SMtape.cs

using System;
using System.Diagnostics;
using System.Runtime.CompilerServices;
using System.Security.Cryptography.X509Certificates;
using VCRlogic;

namespace VCRlogic
{
    public static class SMtape
    {
        private static StateTape _concreteState;

        public delegate void TapeEventHandler();

        public static event TapeEventHandler evIntape;

        public static event TapeEventHandler evOuttape;


        public static void initSMtape()
        {
            setState(new StapeNoTapeIn());

            //evIntape += evIntape;
        }

        public static void setState(StateTape e)
        {
            _concreteState = null;

            _concreteState = e;
        }


        public static void insertTape()
        {
            if (evIntape != null)
            {
                evIntape();
            }
        }

        public static void ejectTape()
        {
            if (evOuttape != null)
            {
                evOuttape();
            }

            
        }
    }
}


public abstract class StateTape
{
    public abstract void evIntape();

    public abstract void evOuttape();
}


public class StapeNoTapeIn : StateTape
{
    public override void evIntape()
    {
        Debug.Print("tape is now in\n");

        //unsub
        SMtape.evIntape -= evIntape;

        SMtape.setState(new StapeTapeInNotEnd());
    }

    public override void evOuttape()
    {
    }


    public StapeNoTapeIn()
    {
        // sub to event
        SMtape.evIntape += evIntape;
    }
}


public class StapeTapeInNotEnd : StateTape
{
    public override void evIntape()
    {
    }

    public override void evOuttape()
    {
        Debug.Print("tape is now out\n");

        //unsub
        SMtape.evOuttape -= evOuttape;
        SMtape.setState(new StapeNoTapeIn());
    }


    public StapeTapeInNotEnd()
    {
        //sub
        SMtape.evOuttape += evOuttape;
    }
}


/*
public class StapeTapeInEnd : StateTape
{
    public override void setStateText()
    {
        throw new NotImplementedException();
    }
}

    */