/// <summary>
/// Handle Falcom commands. Determine if command is valid,
/// what is the type of it, and execute (if valid).
/// </summary>
/// <param name="input">Falcon command (including cmd char)</param>
/// <param name="output">Execution result</param>
/// <returns>Is command valid, Command message, Command Type, On or Off flag</returns>
public static bool Parse(string cmd, ref string message, ref Command.Type type, ref Argument argumentObj)
{
// extract command name and arguments
string[] cmdArr = cmd.Split(CMD_SPLITTER);
string cmdName = cmdArr[CMD_NAME_INDX];
bool noArgument = (cmdArr.Length <= 1) ? true : false;
SshCommand sshCmd = new SshCommand();
PingCommand pingCmd = new PingCommand();
ClearCommand clearCmd = new ClearCommand();
HelpCommand helpCmd = new HelpCommand();
InvalidCommand invalidCmd = new InvalidCommand();
// return values to caller according to cmd name
switch (cmdName)
{
case "ssh":
if (noArgument)
{
message = sshCmd.GetNoArgumentMsg();
return(false);
}
if (cmdArr.Length < 4)
{
message = sshCmd.GetInvalidArgumentMsg();
return(false);
}
string sshArgs = cmdArr[CMD_ARG_INDX] + " " +
cmdArr[CMD_ARG_INDX + 1] + " " +
cmdArr[CMD_ARG_INDX + 2];
sshCmd.InitArgument(sshArgs);
type = sshCmd.GetCommandType();
if (!sshCmd.IsValidArgument())
{
message = sshCmd.GetInvalidArgumentMsg();
return(false);
}
argumentObj = sshCmd.GetArgumentObject();
return(true);
case "ping":
if (noArgument)
{
message = pingCmd.GetNoArgumentMsg();
return(false);
}
pingCmd.InitArgument(cmdArr[CMD_ARG_INDX]);
type = pingCmd.GetCommandType();
argumentObj = pingCmd.GetArgumentObject();
message = pingCmd.GetSuccessMsg();
return(true);
case "clear":
type = clearCmd.GetCommandType();
message = clearCmd.GetSuccessMsg();
return(true);
case "help":
if (noArgument)
{
message = helpCmd.GetNoArgumentMsg();
return(false);
}
helpCmd.InitArgument(cmdArr[CMD_ARG_INDX]);
if (!helpCmd.IsValidArgument())
{
message = helpCmd.GetInvalidArgumentMsg();
return(false);
}
switch (cmdArr[CMD_ARG_INDX])
{
case "ssh":
message = sshCmd.GetHelpMsg();
break;
case "ping":
message = pingCmd.GetHelpMsg();
break;
case "clear":
message = clearCmd.GetHelpMsg();
break;
case "help":
message = helpCmd.GetHelpMsg();
break;
}
break;
default:
{
invalidCmd.InitArgument(cmd);
type = invalidCmd.GetCommandType();
message = invalidCmd.GetInvalidArgumentMsg();
break;
}
}
return(false);
}