fcs/lib/model/shared_pref.dart

import 'package:shared_preferences/shared_preferences.dart';
import 'package:fcs/vo/report.dart';
import 'dart:convert';

import 'package:fcs/vo/user.dart';

class SharedPref {
  static final SharedPref instance = SharedPref._();
  SharedPref._();

  static Future<String> getLang() async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    return prefs.getString('language');
  }

  static Future<void> saveLang(String lang) async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    prefs.setString('language', lang);
  }

  static Future<void> saveUser(User user) async {
    await _save("user", user.toJson());
  }

  static Future<void> saveReport(ReportFieldPositionSelection report) async {
    await _save('report-${report.id}', report.toJson());
  }

  static Future<ReportFieldPositionSelection> getReport(String id) async {
    try {
      return ReportFieldPositionSelection.fromJson(await _read("report-$id"));
    } catch (e) {
      return null;
    }
  }

  static Future<User> getUser() async {
    try {
      return User.fromJson(await _read("user"));
    } catch (e) {
      return null;
    }
  }

  static Future<User> removeUser() async {
    return await _remove("user");
  }

  static Future<void> saveSkippedRecoverEmail(bool skipped) async {
    await _save("skipped_recovery_email", skipped);
  }

  static Future<bool> getSkippedRecoverEmail() async {
    try {
      bool _skipped = await _read("skipped_recovery_email");
      return _skipped;
    } catch (e) {
      return null;
    }
  }

  static _read(String key) async {
    try {
      final prefs = await SharedPreferences.getInstance();
      return json.decode(prefs.getString(key));
    } catch (e) {
      print("Error:$e");
    }
  }

  static _save(String key, value) async {
    try {
      final prefs = await SharedPreferences.getInstance();
      prefs.setString(key, json.encode(value));
    } catch (e) {
      print("Error:$e");
    }
  }

  static _remove(String key) async {
    final prefs = await SharedPreferences.getInstance();
    prefs.remove(key);
  }
}