public static string AcceptInput(
string helpMessage,
string errorMessage,
Predicate <string> checkValid,
Func <string, string> getPrediction = null,
string acceptedCharsPattern = ".")
{
if (getPrediction == null)
{
getPrediction = emptyPredictor;
}
string message = helpMessage;
string text = "";
string prediction = null;
bool enterPressed = false;
bool isValid = false;
while (!enterPressed)
{
isValid = checkValid(text);
ConsoleUtils.Colored(() =>
{
ConsoleUtils.ClearCurrentConsoleLine();
Console.Write(" ");
if (text.Length.Equals(0))
{
Console.Write(" ");
}
else
{
ConsoleUtils.Colored(() => Console.Write(isValid ? "✓" : "×"), foregroundColor: isValid ? Green : Red);
}
Console.Write(" " + message);
Console.Write(text);
});
if (prediction != null)
{
var cl = Console.CursorLeft;
var ct = Console.CursorTop;
ConsoleUtils.Colored(() => Console.Write(prediction), foregroundColor: PREDICTION_COLOR);
Console.SetCursorPosition(cl, ct);
}
ConsoleKeyInfo cki = Console.ReadKey(true);
// Terminate program on Ctrl + C
if (cki.Modifiers.HasFlag(ConsoleModifiers.Control))
{
if (cki.Key.Equals(ConsoleKey.C))
{
System.Environment.Exit(128);
}
}
switch (cki.Key)
{
case ConsoleKey.Backspace:
if (text.Length > 0)
{
text = text.Substring(0, text.Length - 1);
}
break;
case ConsoleKey.Enter:
if (isValid)
{
enterPressed = true;
}
break;
case ConsoleKey.Tab:
if (prediction != null)
{
text += prediction;
prediction = null;
}
break;
default:
var regex = new Regex(acceptedCharsPattern);
if (!char.IsControl(cki.KeyChar))
{
text += cki.KeyChar;
text = text.Trim();
}
break;
}
prediction = getPrediction(text);
}
return(text);
}