private static Func <UserInterfaceState> invalidSelection(TextWriter writer, UserInterfaceState state)
{
return(() =>
{
writer.WriteLine("Invalid selection. Please try again.");
return state;
});
}
public static Option <UserInterfaceState> getTakeBack(this UserInterfaceState state)
{
return(state.Fold(game => Option.None <UserInterfaceState>(),
game => Option.Some(new UserInterfaceState(game.takeBack(), state.writer, state.reader)),
game => Option.Some(new UserInterfaceState(game.takeBack(), state.writer, state.reader)),
game => Option.Some(new UserInterfaceState(game.takeBack(), state.writer, state.reader)),
game => Option.Some(new UserInterfaceState(game.takeBack(), state.writer, state.reader)),
game => Option.Some(new UserInterfaceState(game.takeBack(), state.writer, state.reader)),
game => Option.Some(new UserInterfaceState(game.takeBack(), state.writer, state.reader)),
game => Option.Some(new UserInterfaceState(game.takeBack(), state.writer, state.reader)),
game => Option.Some(new UserInterfaceState(game.takeBack(), state.writer, state.reader)),
game => Option.Some(new UserInterfaceState(game.takeBack(), state.writer, state.reader)),
game => Option.Some(new UserInterfaceState(game.takeBack(), state.writer, state.reader)),
game => Option.Some(new UserInterfaceState(game.takeBack(), state.writer, state.reader)),
game => Option.Some(new UserInterfaceState(game.takeBack(), state.writer, state.reader)),
game => Option.Some(new UserInterfaceState(game.takeBack(), state.writer, state.reader)),
game => Option.Some(new UserInterfaceState(game.takeBack(), state.writer, state.reader))
));
}
public static MoverOrWinner getMoverOrWinner(this UserInterfaceState state)
{
return(state.Fold(
game0 => new MoverOrWinner(position => Option.Some(new UserInterfaceState(game0.move(position), state.writer, state.reader))),
game1 => new MoverOrWinner(position => from _2 in game1.move(position) select new UserInterfaceState(_2, state.writer, state.reader)),
game2 => new MoverOrWinner(position => from _3 in game2.move(position) select new UserInterfaceState(_3, state.writer, state.reader)),
game3 => new MoverOrWinner(position => from _4 in game3.move(position) select new UserInterfaceState(_4, state.writer, state.reader)),
game4 => new MoverOrWinner(position => from _5 in game4.move(position) select _5.Fold(game5 => new UserInterfaceState(game5, state.writer, state.reader), win5 => new UserInterfaceState(win5, state.writer, state.reader))),
game5 => new MoverOrWinner(position => game5.move(position).Select(result => result.Fold(game6 => new UserInterfaceState(game6, state.writer, state.reader), win6 => new UserInterfaceState(win6, state.writer, state.reader)))),
game6 => new MoverOrWinner(position => game6.move(position).Select(result => result.Fold(game7 => new UserInterfaceState(game7, state.writer, state.reader), win7 => new UserInterfaceState(win7, state.writer, state.reader)))),
game7 => new MoverOrWinner(position => game7.move(position).Select(result => result.Fold(game8 => new UserInterfaceState(game8, state.writer, state.reader), win8 => new UserInterfaceState(win8, state.writer, state.reader)))),
game8 => new MoverOrWinner(position => game8.move(position).Select(result => result.Fold(game9 => new UserInterfaceState(game9, state.writer, state.reader), win9 => new UserInterfaceState(win9, state.writer, state.reader)))),
game9 => new MoverOrWinner(Option.None <Player>()),
win5 => new MoverOrWinner(Option.Some(Player.Player0)),
win6 => new MoverOrWinner(Option.Some(Player.Player1)),
win7 => new MoverOrWinner(Option.Some(Player.Player0)),
win8 => new MoverOrWinner(Option.Some(Player.Player1)),
win9 => new MoverOrWinner(Option.Some(Player.Player0))
));
}
private static Option <KeyValuePair <UserInterfaceState, UserInterfaceState> > gameLoop(UserInterfaceState state)
{
state.writer.WriteLine("\n\n{0}\n", state.data.ToString(state.toChar));
var moverOrWinner = state.getMoverOrWinner();
moverOrWinner.Fold(printMoves(state.writer, state.data.whoseTurn()), printWinner(state.writer));
state.writer.WriteLine(" q to Quit");
state.writer.WriteLine(" v to view board positions");
var takeBack = state.getTakeBack();
if (takeBack.Any())
{
state.writer.WriteLine(" t to take back last move");
}
state.writer.Write(" > ");
var line = state.reader.ReadLine();
if (line == string.Empty)
{
state.writer.WriteLine("Please make a selection.");
return(Option.Some(new KeyValuePair <UserInterfaceState, UserInterfaceState>(default(UserInterfaceState), state)));
}
var c = char.ToUpper(line[0]);
switch (c)
{
case 'Q':
state.writer.WriteLine("Bye!");
return(Option.None <KeyValuePair <UserInterfaceState, UserInterfaceState> >());
case 'V':
return(Option.Some(new KeyValuePair <UserInterfaceState, UserInterfaceState>(default(UserInterfaceState), new UserInterfaceState(state, PositionExtensions.ToChar))));
case 'T':
return(Option.Some(new KeyValuePair <UserInterfaceState, UserInterfaceState>(default(UserInterfaceState), takeBack.Fold(invalidSelection(state.writer, state), s => s))));
default:
return(Option.Some(new KeyValuePair <UserInterfaceState, UserInterfaceState>(default(UserInterfaceState), (from mover in moverOrWinner.Fold(mover => Option.Some(mover), _ => Option.None <Func <Position, Option <UserInterfaceState> > >())
from position in c.ToPosition()
select mover(position)).FirstOrDefault().Fold(invalidSelection(state.writer, state), s => s))));
}
}
public UserInterfaceState(UserInterfaceState state, Func <Position, char> toChar) : this(state.value, state.data, state.writer, state.reader, toChar)
{
}