private void TDRawDeviceEvent(IntPtr data, int controllerId, int callbackId, IntPtr context)
{
string parsedData = Marshal.PtrToStringAnsi(data);
if (string.IsNullOrWhiteSpace(parsedData))
{
return;
}
RawCommandReceivedEventArgs eventArgs = new RawCommandReceivedEventArgs(controllerId, parsedData);
RawCommandReceived.Trigger(this, eventArgs);
}
/// <summary>
/// Runs the Communication Session
/// </summary>
/// <param name="cancellationToken">The Cancellation Token</param>
/// <returns>The executing task</returns>
public async Task RunAsync(CancellationToken cancellationToken)
{
// Make sure the session is not a closed session
if (this.Status == SessionStatus.Stopped)
{
throw new InvalidOperationException("Session is already stopped and cannot be reused");
}
// Set the Status to Running
this.Status = SessionStatus.Running;
// Output Welcome Message
await ReplyAsync(cancellationToken, "Welcome!");
if (ShowPrompt)
{
await PrintPromptAsync(cancellationToken);
}
// Listen to following session requests
while (cancellationToken.IsCancellationRequested == false)
{
// Retrieve the command input
var command = await ReadCommandAsync(cancellationToken).ConfigureAwait(false);
if (command == null)
{
break;
}
// Process Internal Commands (since there are very few commands, they are hard coded)
var commandUpper = command.ToUpper();
if (commandUpper == "SET TIMER ON")
{
ShowTimer = true;
}
else if (commandUpper == "SET TIMER OFF")
{
ShowTimer = false;
}
else if (commandUpper == "SET PROMPT ON")
{
ShowPrompt = true;
}
else if (commandUpper == "SET PROMPT OFF")
{
ShowPrompt = false;
}
else if (commandUpper == "QUIT")
{
break;
}
else
{
// Other commands, process properly
// Raise Command Received Event
var commandEventArgs = new RawCommandInputReceivedEventArgs(command);
// Create the Processing Signal
CancellationTokenSource tokenSource = new CancellationTokenSource();
CancellationToken token = tokenSource.Token;
var taskProcessing = new Task(async() =>
{
var capturedToken = token;
var characters = new char[] { '|', '/', '-', '\\' };
int currentChar = 0;
while (token.IsCancellationRequested == false)
{
await ReplyAsync(cancellationToken, "\r" + characters[currentChar], true, false);
currentChar++;
if (currentChar == 4)
{
currentChar = 0;
}
await Task.Delay(250);
}
}, token);
if (ShowTimer)
{
taskProcessing.Start();
}
RawCommandReceived?.Invoke(this, commandEventArgs);
// Cancel the processing thing
if (ShowTimer)
{
tokenSource.Cancel();
}
// Reply to command
if (String.IsNullOrEmpty(commandEventArgs.Response))
{
await ReplyAsync(cancellationToken, "\rNo Response");
}
else
{
await ReplyAsync(cancellationToken, "\r" + commandEventArgs.Response);
}
}
// Display Prompt for Next Command
if (ShowPrompt)
{
await PrintPromptAsync(cancellationToken);
}
}
// Stop Session
this.Stop();
}
