Add ios connection info

ios/Runner/Handlers/ActiveGroupsEventHandler.swift

@@ -0,0 +1,49 @@
+import Foundation
+import Combine
+import Libcore
+
+public class ActiveGroupsEventHandler: NSObject, FlutterPlugin, FlutterStreamHandler {
+    
+    static let name = "\(Bundle.main.serviceIdentifier)/active-groups"
+    private var commandClient: CommandClient?
+    private var channel: FlutterEventChannel?
+    private var events: FlutterEventSink?
+    private var cancellable: AnyCancellable?
+    
+    public static func register(with registrar: FlutterPluginRegistrar) {
+        let instance = ActiveGroupsEventHandler()
+        instance.channel = FlutterEventChannel(name: Self.name,
+                                               binaryMessenger: registrar.messenger())
+        instance.channel?.setStreamHandler(instance)
+    }
+    
+    public func onListen(withArguments arguments: Any?, eventSink events: @escaping FlutterEventSink) -> FlutterError? {
+        FileManager.default.changeCurrentDirectoryPath(FilePath.sharedDirectory.path)
+        self.events = events
+        commandClient = CommandClient(.groupsInfoOnly)
+        commandClient?.connect()
+        cancellable =  commandClient?.$groups.sink{ [self] sbGroups in
+            self.writeGroups(sbGroups)
+        }
+        return nil
+    }
+    
+    public func onCancel(withArguments arguments: Any?) -> FlutterError? {
+        commandClient?.disconnect()
+        cancellable?.cancel()
+        events = nil
+        return nil
+    }
+    
+    func writeGroups(_ sbGroups: [SBGroup]?) {
+        guard let sbGroups else {return}
+        if
+            let groups = try? JSONEncoder().encode(sbGroups),
+            let groups = String(data: groups, encoding: .utf8)
+        {
+            DispatchQueue.main.async { [events = self.events, groups] () in
+                events?(groups)
+            }
+        }
+    }
+}