lib/setui/settings/service/lib/src/network_controller.dart

// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'dart:async';

import 'package:fidl_fuchsia_setui/fidl.dart';

import 'setui_setting_controller.dart';

// TODO: Implement and override applyMutation.
class NetworkController extends SetUiSettingController {
  @override
  Future<void> close() async {
    // TODO: implement close
  }

  @override
  Future<void> initialize() async {
    // TODO: implement initialize
  }

  // TODO: implement value
  @override
  SettingsObject get value => null;
}

/// STOPSHIP(brycelee): re-enable once Migration is complete
// /// How often to poll the wlan for wifi information.
// const Duration _statusPeriod = Duration(seconds: 3);

// /// How often to poll the wlan for available wifi networks.
// const Duration _scanPeriod = Duration(seconds: 40);

// const int _scanTimeout = 25;

// const _connectionScanInterval = 3;

// class NetworkController extends SetUiSettingController {
//   // List of APs that we obtained from wireless scanning.
//   // Periodically refreshed when there is no connected network.
//   List<wlan.Ap> _scannedAps = [];

//   /// This status is guaranteed to not be null as long as initialize is
//   /// called. Periodically refreshed.
//   wlan.WlanStatus _status;

//   Timer _updateTimer;
//   Timer _scanTimer;

//   wlan.WlanProxy _wlanProxy;

//   @override
//   Future<void> close() async {
//     _scanTimer?.cancel();
//     _updateTimer?.cancel();
//     _wlanProxy?.ctrl?.close();
//     _scannedAps = [];
//     _status = null;
//   }

//   @override
//   Future<void> initialize() async {
//     await initializeWithService(() async {
//       final proxy = wlan.WlanProxy();
//       connectToService(
//           StartupContext.fromStartupInfo().environmentServices, proxy.ctrl);
//       return proxy;
//     });
//   }

//   /// Initializes the controller with the given [wlan.WlanProxy].
//   ///
//   /// Needed to allow providing a fake proxy for testing.
//   @visibleForTesting
//   Future<void> initializeWithService(
//       Future<wlan.WlanProxy> proxyGetter()) async {
//     final Completer<bool> wlanCompleter = Completer();

//     _wlanProxy = await proxyGetter();

//     _updateTimer = Timer.periodic(_statusPeriod, (timer) {
//       _wlanProxy.status((status) {
//         if (_onStatusRefreshed(status)) {
//           notifyListeners();
//         }
//       });
//     });

//     _wlanProxy.status((status) {
//       _onStatusRefreshed(status);
//       wlanCompleter.complete(true);
//     });

//     /// Waits for all initial values and then returns false if any of the futures return false
//     return await wlanCompleter.future;
//   }

//   @override
//   Future<bool> setSettingValue(SettingsObject value) async {
//     assert(value.data.tag == SettingDataTag.wireless);

//     if (value.data.tag != SettingDataTag.wireless) {
//       return false;
//     }

//     final accessPoints = value.data.wireless?.accessPoints ?? [];

//     for (WirelessAccessPoint ap in accessPoints) {
//       if (_status.currentAp != null &&
//           ap.accessPointId == _accessPointId(_status.currentAp.ssid)) {
//         if (ap.status == ConnectionStatus.disconnected ||
//             ap.status == ConnectionStatus.disconnecting) {
//           await _disconnect();
//         }
//       } else {
//         if (ap.status == ConnectionStatus.connected ||
//             ap.status == ConnectionStatus.connecting) {
//           await _connect(ap.name,
//               ap.security == WirelessSecurity.secured ? ap.password : null);
//         }
//       }
//     }

//     return true;
//   }

//   @override
//   SettingsObject get value => _buildSettingsObject();

//   // Returns true if this caused a change in state.
//   bool _onStatusRefreshed(wlan.WlanStatus status) {
//     bool changed = false;

//     if (_status != status) {
//       _status = status;
//       changed = true;
//     }
//     if (status.state == wlan.State.associated) {
//       _scanTimer?.cancel();
//       _scannedAps = [];
//     } else {
//       if (_scanTimer == null || !_scanTimer.isActive) {
//         _scan();
//         _scanTimer = Timer.periodic(_scanPeriod, (timer) {
//           _scan();
//         });
//       }
//     }

//     return changed;
//   }

//   SettingsObject _buildSettingsObject() {
//     return SettingsObject(
//         settingType: SettingType.wireless,
//         data: SettingData.withWireless(_buildWirelessState()));
//   }

//   WirelessState _buildWirelessState() {
//     return WirelessState(
//         accessPoints: _status.currentAp != null
//             ? [_buildCurrentAccessPoint()]
//             : _scannedAps.map(_buildAccessPoint).toList());
//   }

//   WirelessAccessPoint _buildCurrentAccessPoint() =>
//       _buildAccessPoint(_status.currentAp, status: _getState(_status.state));

//   WirelessAccessPoint _buildAccessPoint(wlan.Ap accessPoint,
//       {ConnectionStatus status}) {
//     return WirelessAccessPoint(
//         accessPointId: _accessPointId(accessPoint.ssid),
//         security: accessPoint.isSecure
//             ? WirelessSecurity.secured
//             : WirelessSecurity.unsecured,
//         password: '',
//         rssi: accessPoint.rssiDbm,
//         status: status ?? ConnectionStatus.disconnected,
//         name: accessPoint.ssid);
//   }

//   void _scan() {
//     _wlanProxy.scan(const wlan.ScanRequest(timeout: _scanTimeout),
//         (wlan.ScanResult scanResult) {
//       _scannedAps = _dedupeAndRemoveIncompatible(scanResult);
//       notifyListeners();
//     });
//   }

//   Future<void> _disconnect() {
//     Completer completer = Completer();
//     _wlanProxy.disconnect((wlan.Error error) {
//       completer.complete();
//     });
//     return completer.future;
//   }

//   Future<bool> _connect(String ssid, [String password]) {
//     Completer<bool> completer = Completer();

//     final config = wlan.ConnectConfig(
//         ssid: ssid,
//         passPhrase: password ?? '',
//         scanInterval: _connectionScanInterval,
//         bssid: '');

//     _wlanProxy.connect(config, (result) {
//       completer.complete(result.code == wlan.ErrCode.ok);
//     });

//     return completer.future;
//   }
// }

// /// Remove duplicate and incompatible networks
// List<wlan.Ap> _dedupeAndRemoveIncompatible(wlan.ScanResult scanResult) {
//   List<wlan.Ap> aps = <wlan.Ap>[];

//   if (scanResult.error.code == wlan.ErrCode.ok) {
//     // First sort APs by signal strength so when we de-dupe we drop the
//     // weakest ones
//     scanResult.aps.sort((wlan.Ap a, wlan.Ap b) => b.rssiDbm - a.rssiDbm);
//     Set<String> seenNames = Set<String>();

//     for (wlan.Ap ap in scanResult.aps) {
//       // Dedupe: if we've seen this ssid before, skip it.
//       if (!seenNames.contains(ap.ssid) && ap.isCompatible) {
//         aps.add(ap);
//       }
//       seenNames.add(ap.ssid);
//     }
//   }
//   return aps;
// }

// ConnectionStatus _getState(wlan.State state) {
//   switch (state) {
//     case wlan.State.associated:
//       return ConnectionStatus.connected;
//     case wlan.State.associating:
//     case wlan.State.joining:
//     case wlan.State.scanning:
//     case wlan.State.bss:
//     case wlan.State.querying:
//     case wlan.State.authenticating:
//       return ConnectionStatus.connecting;
//     default:
//       return ConnectionStatus.unknown;
//   }
// }

// int _accessPointId(String ssid) => ssid.hashCode;