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LgTvConnection.cs
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LgTvConnection.cs
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using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using Newtonsoft.Json;
using Windows.Networking.Sockets;
using Windows.Storage.Streams;
using Windows.Web;
using Newtonsoft.Json.Serialization;
using Newtonsoft.Json.Linq;
using Windows.Foundation;
namespace LgTv
{
public class SendMessageException : Exception
{
public SendMessageException(string message, Exception e) : base(message, e)
{
}
}
public class LgTvApiCore : IDisposable
{
private MessageWebSocket _connection;
private DataWriter _messageWriter;
private int _commandCount;
public event IsConnectedDelegate IsConnected;
private readonly ConcurrentDictionary<string, TaskCompletionSource<dynamic>> _tokens = new ConcurrentDictionary<string, TaskCompletionSource<dynamic>>();
private static void Log(RawRequestMessage message) { }
public async Task<bool> Connect(Uri uri, bool ignoreReceiver = false)
{
try
{
_commandCount = 0;
_connection = new MessageWebSocket();
_connection.Control.MessageType = SocketMessageType.Utf8;
// if(ignoreReceiver==false)
_connection.MessageReceived += Connection_MessageReceived;
_connection.Closed += Connection_Closed;
await _connection.ConnectAsync(uri);
IsConnected?.Invoke(true);
_messageWriter = new DataWriter(_connection.OutputStream);
return true;
}
catch (Exception e)
{
switch (SocketError.GetStatus(e.HResult))
{
case SocketErrorStatus.HostNotFound:
// Handle HostNotFound Error
break;
default:
// Handle Unknown Error
break;
}
return false;
}
}
public async void SendMessageAsync(string message)
{
_messageWriter.WriteString(message);
await _messageWriter.StoreAsync();
}
public Task<dynamic> SendCommandAsync(string message)
{
var obj = JsonConvert.DeserializeObject<dynamic>(message);
return SendCommandAsync((string)obj.id, message);
}
private Task<dynamic> SendCommandAsync(string id, string message)
{
try
{
var taskSource = new TaskCompletionSource<dynamic>();
_tokens.TryAdd(id, taskSource);
SendMessageAsync(message);
return taskSource.Task;
}
catch (Exception e)
{
throw new SendMessageException("Can't send message", e);
}
}
public Task<dynamic> SendCommandAsync(RequestMessage message)
{
var rawMessage = new RawRequestMessage(message, ++_commandCount);
var serialized = JsonConvert.SerializeObject(rawMessage, new JsonSerializerSettings()
{
NullValueHandling = NullValueHandling.Ignore,
ContractResolver = new CamelCasePropertyNamesContractResolver()
});
return SendCommandAsync(rawMessage.Id, serialized);
}
private void Connection_Closed(IWebSocket sender, WebSocketClosedEventArgs args)
{
MessageWebSocket webSocket = Interlocked.Exchange(ref _connection, null);
webSocket?.Dispose();
}
private void Connection_MessageReceived(MessageWebSocket sender, MessageWebSocketMessageReceivedEventArgs args)
{
try
{
using (var dr = args.GetDataReader())
{
dr.UnicodeEncoding = UnicodeEncoding.Utf8;
var message = dr.ReadString(dr.UnconsumedBufferLength);
var obj = JsonConvert.DeserializeObject<dynamic>(message);
var id = (string)obj.id;
var type = (string)obj.type;
TaskCompletionSource<dynamic> taskCompletion;
if (type == "registered")
{
if (_tokens.TryRemove(id, out taskCompletion))
{
var key = (string)JObject.Parse(message)["payload"]["client-key"];
taskCompletion.TrySetResult(new { clientKey = key });
}
}
else
if (_tokens.TryGetValue(id, out taskCompletion))
{
if (id == "register_0") return;
if (obj.type == "error")
{
taskCompletion.SetException(new Exception(obj.error));
}
//else if (args.Cancelled)
//{
// taskSource.SetCanceled();
//}
taskCompletion.TrySetResult(obj.payload);
}
}
}
catch (Exception ex)
{
WebErrorStatus status = WebSocketError.GetStatus(ex.GetBaseException().HResult);
}
}
public void Close()
{
_connection?.Close(1, "");
}
public void Dispose()
{
_connection?.Dispose();
}
}
}