jellyfin/Emby.Server.Implementations/Session/WebSocketController.cs

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using System;
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using System.Collections.Generic;
using System.Linq;
using System.Net.WebSockets;
using System.Threading;
using System.Threading.Tasks;
using MediaBrowser.Controller.Net;
using MediaBrowser.Controller.Session;
using MediaBrowser.Model.Net;
using Microsoft.Extensions.Logging;
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namespace Emby.Server.Implementations.Session
{
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public class WebSocketController : ISessionController, IDisposable
{
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public SessionInfo Session { get; private set; }
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public IReadOnlyList<IWebSocketConnection> Sockets { get; private set; }
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private readonly ILogger _logger;
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private readonly ISessionManager _sessionManager;
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public WebSocketController(SessionInfo session, ILogger logger, ISessionManager sessionManager)
{
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Session = session;
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_logger = logger;
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_sessionManager = sessionManager;
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Sockets = new List<IWebSocketConnection>();
}
private bool HasOpenSockets => GetActiveSockets().Any();
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public bool SupportsMediaControl => HasOpenSockets;
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public bool IsSessionActive => HasOpenSockets;
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private IEnumerable<IWebSocketConnection> GetActiveSockets()
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{
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return Sockets
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.OrderByDescending(i => i.LastActivityDate)
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.Where(i => i.State == WebSocketState.Open);
}
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public void AddWebSocket(IWebSocketConnection connection)
{
var sockets = Sockets.ToList();
sockets.Add(connection);
Sockets = sockets;
connection.Closed += connection_Closed;
}
void connection_Closed(object sender, EventArgs e)
{
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var connection = (IWebSocketConnection)sender;
var sockets = Sockets.ToList();
sockets.Remove(connection);
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Sockets = sockets;
_sessionManager.CloseIfNeeded(Session);
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}
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public Task SendMessage<T>(string name, string messageId, T data, ISessionController[] allControllers, CancellationToken cancellationToken)
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{
var socket = GetActiveSockets()
.FirstOrDefault();
if (socket == null)
{
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return Task.CompletedTask;
}
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return socket.SendAsync(new WebSocketMessage<T>
{
Data = data,
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MessageType = name,
MessageId = messageId
}, cancellationToken);
}
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public void Dispose()
{
foreach (var socket in Sockets.ToList())
{
socket.Closed -= connection_Closed;
}
}
}
}