import 'package:mqtt_client/mqtt_server_client.dart'; import 'package:shared_preferences/shared_preferences.dart'; import 'package:mqtt_client/mqtt_client.dart'; class BusinessLogic { static Future loadPreferences() async { return await SharedPreferences.getInstance(); } static Future savePreferences(Map prefs) async { final SharedPreferences sharedPrefs = await SharedPreferences.getInstance(); prefs.forEach((key, value) async { await sharedPrefs.setBool(key, value); }); } static void publishMessage( MqttServerClient client, String topic, String message) { final builder = MqttClientPayloadBuilder(); builder.addString(message); client.publishMessage(topic, MqttQos.atLeastOnce, builder.payload!); } static Future saveTDSValues(double initialTDS, double finalTDS) async { final SharedPreferences prefs = await SharedPreferences.getInstance(); await prefs.setDouble('initialTDS', initialTDS); await prefs.setDouble('finalTDS', finalTDS); } static Future> getTDSValues() async { final SharedPreferences prefs = await SharedPreferences.getInstance(); final initialTDS = prefs.getDouble('initialTDS') ?? 0.0; final finalTDS = prefs.getDouble('finalTDS') ?? 0.0; return { 'initialTDS': initialTDS, 'finalTDS': finalTDS, }; } }