/// <summary>
/// Asynchronously opens a connection to the Slack RTM API.
/// </summary>
/// <param name="token">Your API token.</param>
/// <param name="cancellationToken">A token to monitor for cancellation requests. The default value is <see cref="System.Threading.CancellationToken.None"/>.</param>
/// <returns>
/// A <see cref="System.Threading.Tasks.Task"/> that represents the asynchronous open operation.
/// </returns>
public async Task OpenAsync(string token, CancellationToken cancellationToken = default(CancellationToken))
{
if (_isDisposed)
{
throw new ObjectDisposedException("Client");
}
if (ConnectionState != ClientConnectionState.Disconnected)
{
throw new InvalidOperationException("Client must not be connected.");
}
ConnectionState = ClientConnectionState.Connecting;
_token = token;
try
{
var response = await Http.GetJsonAsync("https://slack.com/api/rtm.start", cancellationToken, "token", _token);
if (response["ok"] == "true")
{
var ws = _websocket = new ClientWebSocket();
if (ConnectionState == ClientConnectionState.Connecting)
{
await ws.ConnectAsync(new Uri(response["url"]), cancellationToken);
}
ConnectionState = ClientConnectionState.Connected;
if (ConnectionState == ClientConnectionState.Connected)
{
BeginReceive(ws);
}
var self = response.Object("self");
Id = self["id"];
var chans = response.ArrayObjects("channels");
}
else
{
ConnectionState = ClientConnectionState.Disconnected;
throw SlackException.FromStatusCode(response["error"]);
}
}
catch (Exception ex)
{
//We need to reset the connection state to disconnected if it fails to connect
//so that it will keep retying.
ConnectionState = ClientConnectionState.Disconnected;
throw;
}
}
/// <summary>
/// Asynchronously sends the specified message.
/// </summary>
/// <param name="message">The message to send.</param>
/// <param name="cancellationToken">A token to monitor for cancellation requests. The default value is <see cref="System.Threading.CancellationToken.None"/>.</param>
/// <returns>The message.</returns>
public async Task SendAsync(Message message, CancellationToken cancellationToken = default(CancellationToken))
{
if (message == null)
{
throw new ArgumentNullException("message");
}
if (_isDisposed)
{
throw new ObjectDisposedException("Client");
}
if (ConnectionState != ClientConnectionState.Established)
{
throw new InvalidOperationException("Client must be connected.");
}
var json = message.ToJson();
var response = await Http.PostJsonAsync("https://slack.com/api/chat.postMessage", json, cancellationToken, "token", _token);
if (response["ok"] != "true")
{
throw SlackException.FromStatusCode(response["error"]);
}
}