/// <summary>
/// Parse command line
/// </summary>
/// <param name="commandLine">Command line</param>
/// <returns></returns>
public static IEnumerable <CommandToken> Parse(string commandLine)
{
CommandToken lastToken = null;
for (int index = 0, count = commandLine.Length; index < count;)
{
switch (commandLine[index])
{
case ' ':
{
lastToken = CommandSpaceToken.Parse(commandLine, ref index);
yield return(lastToken);
break;
}
case '"':
case '\'':
{
if (lastToken is CommandQuoteToken quote)
{
// "'"
if (quote.Value[0] != commandLine[index])
{
goto default;
}
}
lastToken = CommandQuoteToken.Parse(commandLine, ref index);
yield return(lastToken);
break;
}
default:
{
lastToken = CommandStringToken.Parse(commandLine, ref index,
lastToken is CommandQuoteToken quote ? quote : null);
yield return(lastToken);
break;
}
}
}
}
private bool OnCommand(string commandLine)
{
if (string.IsNullOrEmpty(commandLine))
{
return(true);
}
string possibleHelp = null;
var tokens = CommandToken.Parse(commandLine).ToArray();
var commandArgs = CommandToken.Parse(commandLine).ToArray();
var availableCommands = new List <(ConsoleCommandMethod Command, object[] Arguments)>();
foreach (var entries in _verbs.Values)
{
foreach (var command in entries)
{
if (command.IsThisCommand(commandArgs, out var consumedArgs))
{
var arguments = new List <object>();
var args = commandArgs.Skip(consumedArgs).ToList();
CommandSpaceToken.Trim(args);
try
{
var parameters = command.Method.GetParameters();
foreach (var arg in parameters)
{
// Parse argument
if (TryProcessValue(arg.ParameterType, args, arg == parameters.Last(), out var value))
{
arguments.Add(value);
}
else
{
if (arg.HasDefaultValue)
{
arguments.Add(arg.DefaultValue);
}
else
{
throw new ArgumentException(arg.Name);
}
}
}
availableCommands.Add((command, arguments.ToArray()));
}
catch
{
// Skip parse errors
possibleHelp = command.Key;
}
}
}
}
switch (availableCommands.Count)
{
case 0:
{
if (!string.IsNullOrEmpty(possibleHelp))
{
OnHelpCommand(possibleHelp);
return(true);
}
return(false);
}
case 1:
{
var(command, arguments) = availableCommands[0];
command.Method.Invoke(command.Instance, arguments);
return(true);
}
default:
{
// Show Ambiguous call
throw new ArgumentException("Ambiguous calls for: " + string.Join(',', availableCommands.Select(u => u.Command.Key).Distinct()));
}
}
}
