/// <summary>
/// Creates a new <see cref="CommandArguments"/> with the given <paramref name="args"/> and <paramref name="translateAliases"/>.
/// </summary>
/// <param name="args">The arguments to process.</param>
/// <param name="translateAliases">
/// <b>True</b> will check for aliases, if found, the command will be changed to the aliased command.
/// <b>False</b> will clean the command, but not alter it.
/// </param>
/// <returns>A <see cref="CommandArguments"/> with a command its and associated arguments.</returns>
public static CommandArguments Create(IList <string> args, bool translateAliases)
{
if (args.Count == 0)
{
// no command
return(new CommandArguments("", new List <string>()));
}
// get command
var command = CommandLineInterfaceHelper.CleanArgument(args[0]);
// check if translation is allowed
if (translateAliases)
{
command = TranslateAlias(command);
}
// get remaining arguments
var list = new List <string>();
foreach (var item in args.Skip(1))
{
var arg = item.Trim();
if (!string.IsNullOrWhiteSpace(arg))
{
list.Add(arg);
}
}
// return command and arguments
return(new CommandArguments(command, list));
// ################################
string TranslateAlias(string alias_)
{
// check for known command names
if (CommandLineInterfaceShared.Commands.ContainsKey(alias_))
{
return(alias_);
}
// check for aliases
foreach (var command_ in CommandLineInterfaceShared.Commands)
{
foreach (var candidateAlias in command_.Value.Aliases)
{
if (alias_.Equals(candidateAlias))
{
return(command_.Value.Command);
}
}
}
// failed to find command or alias
return(alias_);
}
}
/// <summary>
/// Starts the Command Line Interface's main message pump.
/// </summary>
public void Start()
{
// display header
Console.WriteLine(CommandLineInterfaceShared.UIHeader);
Console.WriteLine();
// start UI message loop
while (true)
{
// get command line from user
Console.Write(CommandLineInterfaceHelper.CommandLinePrompt);
var line = CleanLine(Console.ReadLine());
// extract command line arguments
var parts = CommandLineInterfaceHelper.ConvertToArgs(line);
// extract command and arguments
var commArgs = CommandArguments.Create(parts);
// process command
if (!string.IsNullOrWhiteSpace(commArgs.Command))
{
// check for exit command
if (commArgs.Command == "exit")
{
break;
}
// process command
try
{
CommandLineInterfaceHelper.GetCommandObject(commArgs.Command)?.Execute(commArgs.Arguments);
}
catch (Exception ex)
{
CommandLineInterfaceHelper.DisplayError(ex.Message);
}
// blank line after invocation
Console.WriteLine();
}
}
// ######## internal methods
string CleanLine(string line_)
{
// remove tabs
line_ = line_.Replace('\t', ' ');
// return processed line
return(line_);
}
}
internal static string DisplayCommands(bool includeHeader)
{
var result = new StringBuilder();
// header
if (includeHeader)
{
result.AppendLine($"command{new string(' ', HelpLineLength - 7)}description");
result.AppendLine(CommandLineInterfaceHelper.SeparatorLine());
}
// commands
foreach (var item in Commands.OrderBy(x => x.Key))
{
result.AppendLine(CommandLineInterfaceHelper.FormatHelp(item.Value));
}
//
return(result.ToString());
}
