Added Socket support

DiscordBotCore/API/Sockets/SocketManager.cs

@@ -0,0 +1,129 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net;
+using System.Net.WebSockets;
+using System.Threading;
+using System.Threading.Tasks;
+using DiscordBotCore.API.Sockets.Sockets;
+using DiscordBotCore.Interfaces.API;
+
+namespace DiscordBotCore.API.Sockets;
+
+internal class SocketManager
+{
+    private readonly IConnectionDetails _ConnectionDetails;
+    private List<ISocket> _Sockets = new List<ISocket>();
+
+    public SocketManager(IConnectionDetails connectionDetails)
+    {
+        _ConnectionDetails = connectionDetails;
+    }
+
+    public void RegisterBaseSockets()
+    {
+        Register(new PluginDownloadProgressSocket());
+    }
+
+    public bool Register(ISocket socket)
+    {
+        if (_Sockets.Any(s => s.Path == socket.Path))
+        {
+            return false;
+        }
+
+        _Sockets.Add(socket);
+        return true;
+    }
+
+    public void Start()
+    {
+        Console.WriteLine("Starting sockets ...");
+        foreach (var socket in _Sockets)
+        {
+            Thread thread = new Thread(() => StartSocket(socket));
+            thread.Start();
+        }
+    }
+
+    private async void StartSocket(ISocket socket)
+    {
+
+        if (!socket.Path.StartsWith("/"))
+        {
+            throw new ArgumentException($"Socket path '{socket.Path}' must start with '/'.");
+        }
+
+        string prefix = $"http://{_ConnectionDetails.Host}:{_ConnectionDetails.Port}{socket.Path}/";
+        Console.WriteLine($"Starting socket with prefix: {prefix}");
+
+        HttpListener listener = new HttpListener();
+        listener.Prefixes.Add(prefix);
+        listener.Start();
+
+        await ConnectionHandler(listener, socket.HandleRequest);
+    }
+
+
+    private async Task ConnectionHandler(HttpListener listener, Func<byte[], int, Task<SocketResponse>> handler)
+    {
+        while (true)
+        {
+            var context = await listener.GetContextAsync();
+
+            if (context.Request.IsWebSocketRequest)
+            {
+                WebSocketContext webSocketContext = await context.AcceptWebSocketAsync(null);
+                Application.CurrentApplication.Logger.Log("WebSocket connection established.");
+                await HandleSocket(webSocketContext.WebSocket, handler);
+            }
+            else { break; }
+        }
+    }
+
+    private async Task HandleSocket(WebSocket socket, Func<byte[], int, Task<SocketResponse>> handler)
+    {
+        if (socket.State != WebSocketState.Open)
+        {
+            return;
+        }
+
+        byte[]                 buffer       = new byte[1024 * 4];
+        var                    receivedData = new List<byte>();
+        WebSocketReceiveResult result;
+
+        do
+        {
+            result = await socket.ReceiveAsync(new ArraySegment<byte>(buffer), CancellationToken.None);
+            receivedData.AddRange(buffer.Take(result.Count));
+        } while (!result.EndOfMessage);
+
+        if (result.MessageType == WebSocketMessageType.Close)
+        {
+            await socket.CloseAsync(WebSocketCloseStatus.NormalClosure, "Closing connection ...", CancellationToken.None);
+            Application.CurrentApplication.Logger.Log("WebSocket connection closed.");
+            return;
+        }
+
+        Application.CurrentApplication.Logger.Log("WebSocket message received. Length: " + receivedData.Count);
+        SocketResponse     socketResponse = await handler(receivedData.ToArray(), receivedData.Count);
+        ArraySegment<byte> response       = new ArraySegment<byte>(socketResponse.Data, 0, socketResponse.Data.Length);
+        byte[]?            lastResponse   = null;
+
+        while (!socketResponse.CloseConnectionAfterResponse)
+        {
+            if (lastResponse == null || !socketResponse.Data.SequenceEqual(lastResponse))
+            {
+                await socket.SendAsync(response, WebSocketMessageType.Text, socketResponse.EndOfMessage, CancellationToken.None);
+                lastResponse = socketResponse.Data;
+            }
+
+            socketResponse = await handler(receivedData.ToArray(), receivedData.Count);
+            response = new ArraySegment<byte>(socketResponse.Data, 0, socketResponse.Data.Length);
+        }
+
+        await socket.CloseAsync(WebSocketCloseStatus.NormalClosure, "Closing connection ...", CancellationToken.None);
+
+
+    }
+}