✨ Device alternative for related device (like watch) to connect websocket

DysonNetwork.Ring/Connection/WebSocketController.cs

@@ -17,42 +17,52 @@ public class WebSocketController(
     INatsConnection nats
 ) : ControllerBase
 {
+    private static readonly List<string> AllowedDeviceAlternative = ["watch"];
+
     [Route("/ws")]
     [Authorize]
     [SwaggerIgnore]
-    public async Task TheGateway()
+    public async Task<ActionResult> TheGateway([FromQuery] string? deviceAlt)
     {
+        if (string.IsNullOrWhiteSpace(deviceAlt))
+            deviceAlt = null;
+        if (deviceAlt is not null && !AllowedDeviceAlternative.Contains(deviceAlt))
+            return BadRequest("Unsupported device alternative: " + deviceAlt);
+
         HttpContext.Items.TryGetValue("CurrentUser", out var currentUserValue);
         HttpContext.Items.TryGetValue("CurrentSession", out var currentSessionValue);
-        if (currentUserValue is not Account currentUser ||
-            currentSessionValue is not AuthSession currentSession)
+        if (
+            currentUserValue is not Account currentUser
+            || currentSessionValue is not AuthSession currentSession
+        )
         {
-            HttpContext.Response.StatusCode = StatusCodes.Status401Unauthorized;
-            return;
+            return Unauthorized();
         }
 
         var accountId = Guid.Parse(currentUser.Id!);
         var deviceId = currentSession.Challenge?.DeviceId ?? Guid.NewGuid().ToString();
 
         if (string.IsNullOrEmpty(deviceId))
-        {
-            HttpContext.Response.StatusCode = StatusCodes.Status400BadRequest;
-            return;
-        }
+            return BadRequest("Unable to get device ID from session.");
+        if (deviceAlt is not null)
+            deviceId = $"{deviceId}+{deviceAlt}";
 
-        var webSocket = await HttpContext.WebSockets.AcceptWebSocketAsync(new WebSocketAcceptContext
-            { KeepAliveInterval = TimeSpan.FromSeconds(60) });
+        var webSocket = await HttpContext.WebSockets.AcceptWebSocketAsync(
+            new WebSocketAcceptContext { KeepAliveInterval = TimeSpan.FromSeconds(60) }
+        );
         var cts = new CancellationTokenSource();
         var connectionKey = (accountId, deviceId);
 
         if (!ws.TryAdd(connectionKey, webSocket, cts))
         {
             await webSocket.SendAsync(
-                new ArraySegment<byte>(new WebSocketPacket
-                {
-                    Type = "error.dupe",
-                    ErrorMessage = "Too many connections from the same device and account."
-                }.ToBytes()),
+                new ArraySegment<byte>(
+                    new WebSocketPacket
+                    {
+                        Type = "error.dupe",
+                        ErrorMessage = "Too many connections from the same device and account.",
+                    }.ToBytes()
+                ),
                 WebSocketMessageType.Binary,
                 true,
                 CancellationToken.None
@@ -62,21 +72,26 @@ public class WebSocketController(
                 "Too many connections from the same device and account.",
                 CancellationToken.None
             );
-            return;
+            return new EmptyResult();
         }
 
         logger.LogDebug(
-            $"Connection established with user @{currentUser.Name}#{currentUser.Id} and device #{deviceId}");
+            $"Connection established with user @{currentUser.Name}#{currentUser.Id} and device #{deviceId}"
+        );
 
         // Broadcast WebSocket connected event
         await nats.PublishAsync(
             WebSocketConnectedEvent.Type,
-            GrpcTypeHelper.ConvertObjectToByteString(new WebSocketConnectedEvent
-            {
-                AccountId = accountId,
-                DeviceId = deviceId,
-                IsOffline = false
-            }).ToByteArray(),
+            GrpcTypeHelper
+                .ConvertObjectToByteString(
+                    new WebSocketConnectedEvent
+                    {
+                        AccountId = accountId,
+                        DeviceId = deviceId,
+                        IsOffline = false,
+                    }
+                )
+                .ToByteArray(),
             cancellationToken: cts.Token
         );
 
@@ -84,7 +99,11 @@ public class WebSocketController(
         {
             await _ConnectionEventLoop(deviceId, currentUser, webSocket, cts.Token);
         }
-        catch (WebSocketException ex) when (ex.Message.Contains("The remote party closed the WebSocket connection without completing the close handshake"))
+        catch (WebSocketException ex)
+            when (ex.Message.Contains(
+                    "The remote party closed the WebSocket connection without completing the close handshake"
+                )
+            )
         {
             logger.LogDebug(
                 "WebSocket disconnected with user @{UserName}#{UserId} and device #{DeviceId} - client closed connection without proper handshake",
@@ -95,7 +114,8 @@ public class WebSocketController(
         }
         catch (Exception ex)
         {
-            logger.LogError(ex,
+            logger.LogError(
+                ex,
                 "WebSocket disconnected with user @{UserName}#{UserId} and device #{DeviceId} unexpectedly",
                 currentUser.Name,
                 currentUser.Id,
@@ -109,12 +129,16 @@ public class WebSocketController(
             // Broadcast WebSocket disconnected event
             await nats.PublishAsync(
                 WebSocketDisconnectedEvent.Type,
-                GrpcTypeHelper.ConvertObjectToByteString(new WebSocketDisconnectedEvent
-                {
-                    AccountId = accountId,
-                    DeviceId = deviceId,
-                    IsOffline = !WebSocketService.GetAccountIsConnected(accountId)
-                }).ToByteArray(),
+                GrpcTypeHelper
+                    .ConvertObjectToByteString(
+                        new WebSocketDisconnectedEvent
+                        {
+                            AccountId = accountId,
+                            DeviceId = deviceId,
+                            IsOffline = !WebSocketService.GetAccountIsConnected(accountId),
+                        }
+                    )
+                    .ToByteArray(),
                 cancellationToken: cts.Token
             );
 
@@ -122,6 +146,8 @@ public class WebSocketController(
                 $"Connection disconnected with user @{currentUser.Name}#{currentUser.Id} and device #{deviceId}"
             );
         }
+
+        return new EmptyResult();
     }
 
     private async Task _ConnectionEventLoop(