private static ConsoleCommandParseFailure?InitialValidation(string commandRepr, out string trimmed)
{
if (string.IsNullOrWhiteSpace(commandRepr))
{
trimmed = "";
return(ConsoleCommandParseFailure.Fail("Input is empty."));
}
trimmed = commandRepr.Trim();
return(trimmed.Length == 0 ? ConsoleCommandParseFailure.Fail("Input is whitespace.") : null);
}
private static IConsoleCommandParseResult?ParameterListValidation(string commandRepr, out int parametersStart)
{
parametersStart = commandRepr.IndexOf("(", StringComparison.Ordinal);
if (parametersStart < 0)
{
return(new ConsoleCommandParseSuccess(commandRepr));
}
if (parametersStart == 0)
{
return(ConsoleCommandParseFailure.Fail("No command name is present."));
}
return(!commandRepr.EndsWith(")")
? ConsoleCommandParseFailure.Fail("Command with params should end with ')'.")
: null);
}