First working version

ios/Runner/Handlers/StatusEventHandler.swift

@@ -0,0 +1,46 @@
+//
+//  StatusEventHandler.swift
+//  Runner
+//
+//  Created by GFWFighter on 10/24/23.
+//
+
+import Foundation
+import Combine
+
+public class StatusEventHandler: NSObject, FlutterPlugin, FlutterStreamHandler {
+    static let name = "\(FilePath.packageName)/service.status"
+    
+    private var channel: FlutterEventChannel?
+    
+    private var cancellable: AnyCancellable?
+    
+    public static func register(with registrar: FlutterPluginRegistrar) {
+        let instance = StatusEventHandler()
+        instance.channel = FlutterEventChannel(name: Self.name, binaryMessenger: registrar.messenger())
+        instance.channel?.setStreamHandler(instance)
+    }
+    
+    public func onListen(withArguments arguments: Any?, eventSink events: @escaping FlutterEventSink) -> FlutterError? {
+        cancellable = VPNManager.shared.$state.sink { [events] status in
+            switch status {
+            case .reasserting, .connecting:
+                events(["status": "Starting"])
+            case .connected:
+                events(["status": "Started"])
+            case .disconnecting:
+                events(["status": "Stopping"])
+            case .disconnected, .invalid:
+                events(["status": "Stopped"])
+            @unknown default:
+                events(["status": "Stopped"])
+            }
+        }
+        return nil
+    }
+    
+    public func onCancel(withArguments arguments: Any?) -> FlutterError? {
+        cancellable?.cancel()
+        return nil
+    }
+}