public Memento3 AddToken(int value)
{
var m = new Memento3(value);
Tokens.Add(new Token(value));
return(m);
}
public Memento3 AddToken(Token token)
{
if (token != null)
{
var m = new Memento3(token.Value);
Tokens.Add(token);
return(m);
}
return(null);
}
public void Revert(Memento3 m)
{
if (m != null)
{
var find = Tokens.Find(t => t.Value == m.Value);
if (find != null)
{
Tokens.Clear();
// revert back to memento state.
Tokens.Add(new Token(find.Value));
}
}
}
// change to Main to run.
public static void Main(string[] args)
{
var tm = new TokenMachine();
// revert to 3
var m = new Memento3(3);
var token1 = new Token(2);
tm.AddToken(token1);
tm.AddToken(1);
tm.AddToken(3);
tm.AddToken(4);
tm.AddToken(5);
tm.AddToken(110);
tm.Print();
Console.WriteLine();
tm.Revert(m);
tm.Print();
}