Improve Home Assistant connection reliability

XIONControlPanel/Servers/WemoServer.swift

@@ -42,9 +42,8 @@ class WemoServer : Server
             self.connectionStatus = .connecting
             
             let op = ConnectOperation(baseURL: self.baseURL, session: _urlSession)
-            weak var weakOp = op
-            op.completionBlock = {
-                guard let strongOp = weakOp else { completion(nil) ; return }
+            op.completionBlock = { [weak op] in
+                guard let strongOp = op else { completion(nil) ; return }
                 if let error = strongOp.error {
                     self._logError("Error connecting to server", error: error)
                     self.connectionStatus = .disconnected
@@ -69,14 +68,18 @@ class WemoServer : Server
     func fetchDevices(_ completion: @escaping (Result<[AnyDevice], Error>) -> Void)
     {
         let op = FetchDevicesOperation(baseURL: self.baseURL, session: _urlSession)
-        op.completionBlock = { [unowned op] in
+        op.completionBlock = { [weak op] in
+            guard let op else {
+                completion(.failure(ConnectionError.unknown))
+                return
+            }
+
             if let error = op.error {
                 self._logError("Error fetching devices", error: error)
                 completion(.failure(error))
-            } else {
-                self.devices = op.devices
+                return
             }
-            
+
             self.devices = op.devices
             completion(.success(self.devices.map { AnyDevice($0) }))
         }
@@ -98,9 +101,8 @@ class WemoServer : Server
     {
         if connectionStatus == .connected, let device = findDevice(device) {
             let op = ToggleDeviceOperation(baseURL: self.baseURL, session: _urlSession, device: device, state: state)
-            weak var weakOp = op
-            op.completionBlock = {
-                guard let strongOp = weakOp else { completion(nil) ; return }
+            op.completionBlock = { [weak op] in
+                guard let strongOp = op else { completion(nil) ; return }
                 if let error = strongOp.error {
                     self._logError("Error toggling device", error: error)
                 }
@@ -132,7 +134,7 @@ class WemoServer : Server
     }
 }
 
-internal class WemoOperation : Operation
+internal class WemoOperation : Operation, @unchecked Sendable
 {
     var baseURL:   URL
     var session:   URLSession
@@ -146,7 +148,7 @@ internal class WemoOperation : Operation
     }
 }
 
-internal class ConnectOperation : WemoOperation
+internal class ConnectOperation : WemoOperation, @unchecked Sendable
 {
     override func main()
     {
@@ -164,7 +166,7 @@ internal class ConnectOperation : WemoOperation
     }
 }
 
-internal class FetchDevicesOperation : WemoOperation
+internal class FetchDevicesOperation : WemoOperation, @unchecked Sendable
 {
     private(set) var devices: [WemoDevice] = []
     
@@ -201,7 +203,7 @@ internal class FetchDevicesOperation : WemoOperation
     }
 }
 
-internal class ToggleDeviceOperation : WemoOperation
+internal class ToggleDeviceOperation : WemoOperation, @unchecked Sendable
 {
     var device: WemoDevice
     var state:  DeviceState