/// <summary>
/// Send message to specific user(id)
/// </summary>
/// <param name="message"></param>
/// <param name="user">The userid receiving this message. UserId can be (optionally) specified in the constructor of the client</param>
public async void SendToUser(T message, string user)
{
var url = $"{baseAzureFunctionUrl}api/broadcast";
var wrapped = new BroadcastMessage()
{
toGroupName = "",
toUser = user,
fromUser = userId,
jsonmessage = JsonConvert.SerializeObject(message)
};
var msg = JsonConvert.SerializeObject(wrapped);
HttpContent c = new StringContent(msg, Encoding.UTF8, "application/json");
await httpClient.PostAsync(url, c);
}
/// <summary>
/// Setup and connect to SignalR. Starts listening for incoming messages.
/// </summary>
public async void Start()
{
//Prevent multiple starts.
if (connection != null)
{
return;
}
//Get the Azure SignalR service Url and Token.
var connectionInfo = await GetSignalRConnectionInfo();
//Build normal SignalR connection, with provided Token.
connection = new HubConnectionBuilder()
.WithUrl(connectionInfo.Url, (options) =>
{
options.AccessTokenProvider = () => Task.FromResult(connectionInfo.AccessToken);
})
.Build();
//Auto reconnected on disconnect
connection.Closed += async(error) =>
{
await Task.Delay(new Random().Next(0, 5) * 1000);
await connection.StartAsync();
};
//Call the delegate when receiving message.
connection.On <string>("newMessage", (wrappedmessage) =>
{
BroadcastMessage messageObject = JsonConvert.DeserializeObject <BroadcastMessage>(wrappedmessage);
if (!((messageObject.fromUser == userId) & FilterOwnMessages))
{
T message = JsonConvert.DeserializeObject <T>(messageObject.jsonmessage);
onMessage?.Invoke(message, messageObject);
}
});
await connection.StartAsync();
}
