managed_userinfo.dart

import 'dart:async';
import 'dart:core';

import 'package:flutter_ritetag/model/client.dart';
import 'package:flutter_ritetag/network/network_calls.dart';
import 'package:meta/meta.dart';
import 'package:shared_preferences/shared_preferences.dart';

import 'user_info.dart';

enum AppLoginState {
  loggedOut,
  loggedInTrialActive,
  loggedInTrialExpired,
  loggedInProExpired,
  loggedInProActive,
  loginSkipped
}

enum ProWidgetState { trial, pro }

class ManagedUserInfo {
  /*Use [AppLoginState] whenever making recommendations for Login/Login Pro and
   *you need exact LoginState*/
  AppLoginState appLoginState;

  /*Use [proWidgetState] to decide whether to act as a TrailWidget or as a ProWidget*/
  ProWidgetState get proWidgetState =>
      appLoginState == AppLoginState.loggedInProActive ||
              appLoginState == AppLoginState.loggedInTrialActive
          ? ProWidgetState.pro
          : ProWidgetState.trial;

  //All the user info
  UserInfo userInfo;

  /*Whenever app starts, we begin with a null instance.
   * We use this null check to initiate the async factory inside
    * UserInfoManager*/
  ManagedUserInfo.nullInstance();

  ManagedUserInfo(
      {@required this.userInfo,
      @required this.appLoginState,
      @required this.daysToExpire});

  //This is an async factory pattern
  static Future<ManagedUserInfo> getCurrentState() async {
    /*...some asynchronous logic for decing the loginState, fetching UserInfo and stuff....*/
 
      return ManagedUserInfo(
        appLoginState: _tUserInfo.plans.ritetagPlan.isTrial
            ? _tUserInfo.plans.ritetagPlan.isActive
                ? AppLoginState.loggedInTrialActive
                : AppLoginState.loggedInTrialExpired
            : _tUserInfo.plans.ritetagPlan.isActive
                ? AppLoginState.loggedInProActive
                : AppLoginState.loggedInProExpired,
        riteKey: _tRiteKey,
        userInfo: _tUserInfo,
        //QuickDoc: 2018.difference(1945) will return a positive duration
        daysToExpire: DateTime
            .now()
            .difference(_tUserInfo.plans.ritetagPlan.expiration)
            .inDays,
      );
  }
}