flutter-plugins/example/lib/packages/battery_plus/model.dart

/*
 * Copyright (C) 2023 Open Mobile Platform LLC.
 * Contact: https://community.omprussia.ru/open-source
 *
 * This file is part of the Aurora OS Application Template project.
 *
 * Redistribution and use in source and binary forms,
 * with or without modification, are permitted provided
 * that the following conditions are met:
 *
 * * Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer
 *   in the documentation and/or other materials provided with the distribution.
 * * Neither the name of the copyright holder nor the names of its contributors
 *   may be used to endorse or promote products derived from this software
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
import 'package:flutter/widgets.dart';
import 'package:scoped_model/scoped_model.dart';
import 'package:battery_plus/battery_plus.dart';

/// Model for [BatteryPlusPage]
class BatteryPlusModel extends Model {
  /// Get [ScopedModel]
  static BatteryPlusModel of(BuildContext context) =>
      ScopedModel.of<BatteryPlusModel>(context);

  final _battery = Battery();

  /// Error
  String? _error;

  /// Public error
  String? get error => _error;

  /// Public is error
  bool get isError => _error != null;

  /// Get battery level in percent 0-100
  Future<int?> getBatteryLevel() async {
    try {
      return await _battery.batteryLevel;
    } catch (e) {
      _error = e.toString();
    }
    notifyListeners();
    return null;
  }

  /// Get status
  Future<BatteryState?> getBatteryState() async {
    try {
      return await _battery.batteryState;
    } catch (e) {
      _error = e.toString();
    }
    notifyListeners();
    return null;
  }

  /// Check is enable save mode
  Future<bool?> isInBatterySaveMode() async {
    try {
      return await _battery.isInBatterySaveMode;
    } catch (e) {
      _error = e.toString();
    }
    notifyListeners();
    return null;
  }

  /// Stream change state
  Stream<BatteryState> onBatteryStateChanged() async* {
    try {
      yield await _battery.batteryState;
      await for (final state in _battery.onBatteryStateChanged) {
        yield state;
      }
    } catch (e) {
      _error = e.toString();
      notifyListeners();
    }
  }
}