Ability to cache currency selection

lib/BaseStatelessWidget.dart

@@ -19,7 +19,7 @@ abstract class BaseStatelessWidget<T extends BaseViewmodel>
   Widget build(BuildContext parent) {
     return Scaffold(
       body: Container(
-        padding: const EdgeInsets.all(PADDING_GLOBAL),
+        padding: const EdgeInsets.all(paddingGlobal),
         decoration: const BoxDecoration(
             gradient: LinearGradient(
                 begin: Alignment.topLeft,

lib/Home.dart

@@ -7,6 +7,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter/src/widgets/framework.dart';
 
 import 'BaseStatelessWidget.dart';
+import 'Utils/Constants.dart';
 
 class HomePage extends BaseStatelessWidget<MainViewModel> {
   @override
@@ -15,11 +16,13 @@ class HomePage extends BaseStatelessWidget<MainViewModel> {
   }
 
   @override
-  Widget displayWidget(
+  Widget displayWidget(BuildContext context, MainViewModel model, Widget? child) {
-      BuildContext context, MainViewModel model, Widget? child) {
     TextEditingController controller1 = TextEditingController();
     TextEditingController controller2 = TextEditingController();
 
+    String selected1 = model.getConversionPair(SelectionType.conversionFrom);
+    String selected2 = model.getConversionPair(SelectionType.conversionTo);
+
     return Column(
       mainAxisAlignment: MainAxisAlignment.center,
       children: [
@@ -27,7 +30,10 @@ class HomePage extends BaseStatelessWidget<MainViewModel> {
           padding: const EdgeInsets.all(8.0),
           child: Column(
             children: [
-              DropDownBox(model.data, (selected) {}),
+              DropDownBox(listOfCurrencies, selected1, (selected) {
+                        selected1 = selected!;
+                        model.setConversionPair(selected1, selected2);
+                      }),
               ConverterEditText("Enter conversion from", controller1, (input) => {
                 controller2.text = model.convertInput(input, SelectionType.conversionFrom)
               })
@@ -38,7 +44,10 @@ class HomePage extends BaseStatelessWidget<MainViewModel> {
           padding: const EdgeInsets.all(8.0),
           child: Column(
             children: [
-              DropDownBox(model.data, (selected) {}),
+              DropDownBox(listOfCurrencies, selected2, (selected) {
+                selected2 = selected!;
+                model.setConversionPair(selected1, selected2);
+              }),
               ConverterEditText("Enter conversion from", controller2, (input) => {
                 controller1.text = model.convertInput(input, SelectionType.conversionTo)
               })

lib/MainViewModel.dart

@@ -1,165 +1,33 @@
 import 'package:easy_cc_flutter/BaseViewModel.dart';
 import 'package:easy_cc_flutter/Utils/SelectionType.dart';
 
+import 'Utils/Constants.dart';
+import 'data/prefs/CurrencyPair.dart';
+import 'data/repository/Repository.dart';
+import 'data/repository/RepositoryImpl.dart';
+import 'locator.dart';
+
 class MainViewModel extends BaseViewmodel {
+  final Repository _repository = locator<RepositoryImpl>();
 
   double conversionRate = 1.4;
 
-  final List<String> data = <String>['ALL - Albanian Lek',
+  String getConversionPair(SelectionType type) {
-    'AFN - Afghan Afghani',
+    CurrencyPair pair = _repository.getConversionPair();
-    'DZD - Algerian Dinar',
+
-    'AOA - Angolan Kwanza',
+    switch (type) {
-    'ARS - Argentine Peso',
+      case SelectionType.conversionFrom:
-    'AMD - Armenian Dram',
+        return pair.currencyOne != null ? pair.currencyOne! : listOfCurrencies[0];
-    'AWG - Aruban Florin',
+      case SelectionType.conversionTo:
-    'AUD - Australian Dollar',
+        return pair.currencyTwo != null ? pair.currencyTwo! : listOfCurrencies[0];
-    'AZN - Azerbaijani Manat',
+      default:
-    'BSD - Bahamian Dollar',
+        throw NullThrownError();
-    'BHD - Bahraini Dinar',
+    }
-    'BDT - Bangladeshi Taka',
+  }
-    'BBD - Barbadian Dollar',
+
-    'BYR - Belarusian Ruble',
+  void setConversionPair(String fromCurrency, String toCurrency) {
-    'BZD - Belize Dollar',
+    _repository.setConversionPair(fromCurrency, toCurrency);
-    'BTN - Bhutanese Ngultrum',
+  }
-    'BTC - Bitcoin',
-    'BOB - Bolivian Boliviano',
-    'BAM - Bosnia And Herzegovina Konvertibilna Marka',
-    'BWP - Botswana Pula',
-    'BRL - Brazilian Real',
-    'GBP - British Pound',
-    'BND - Brunei Dollar',
-    'BGN - Bulgarian Lev',
-    'BIF - Burundi Franc',
-    'KHR - Cambodian Riel',
-    'CAD - Canadian Dollar',
-    'CVE - Cape Verdean Escudo',
-    'KYD - Cayman Islands Dollar',
-    'XAF - Central African CFA Franc',
-    'XPF - CFP Franc',
-    'CLP - Chilean Peso',
-    'CNY - Chinese Yuan',
-    'COP - Colombian Peso',
-    'KMF - Comorian Franc',
-    'CDF - Congolese Franc',
-    'CRC - Costa Rican Colon',
-    'HRK - Croatian Kuna',
-    'CUP - Cuban Peso',
-    'CZK - Czech Koruna',
-    'DKK - Danish Krone',
-    'DJF - Djiboutian Franc',
-    'DOP - Dominican Peso',
-    'XCD - East Caribbean Dollar',
-    'EGP - Egyptian Pound',
-    'ERN - Eritrean Nakfa',
-    'ETB - Ethiopian Birr',
-    'EUR - Euro',
-    'FKP - Falkland Islands Pound',
-    'FJD - Fijian Dollar',
-    'GMD - Gambian Dalasi',
-    'GEL - Georgian Lari',
-    'GHS - Ghanaian Cedi',
-    'GIP - Gibraltar Pound',
-    'GTQ - Guatemalan Quetzal',
-    'GNF - Guinean Franc',
-    'GYD - Guyanese Dollar',
-    'HTG - Haitian Gourde',
-    'HNL - Honduran Lempira',
-    'HKD - Hong Kong Dollar',
-    'HUF - Hungarian Forint',
-    'ISK - Icelandic Kr\u00f3na',
-    'INR - Indian Rupee',
-    'IDR - Indonesian Rupiah',
-    'IRR - Iranian Rial',
-    'IQD - Iraqi Dinar',
-    'ILS - Israeli New Sheqel',
-    'JMD - Jamaican Dollar',
-    'JPY - Japanese Yen',
-    'JOD - Jordanian Dinar',
-    'KZT - Kazakhstani Tenge',
-    'KES - Kenyan Shilling',
-    'KWD - Kuwaiti Dinar',
-    'KGS - Kyrgyzstani Som',
-    'LAK - Lao Kip',
-    'LVL - Latvian Lats',
-    'LBP - Lebanese Lira',
-    'LSL - Lesotho Loti',
-    'LRD - Liberian Dollar',
-    'LYD - Libyan Dinar',
-    'MOP - Macanese Pataca',
-    'MKD - Macedonian Denar',
-    'MGA - Malagasy Ariary',
-    'MWK - Malawian Kwacha',
-    'MYR - Malaysian Ringgit',
-    'MVR - Maldivian Rufiyaa',
-    'MRO - Mauritanian Ouguiya',
-    'MUR - Mauritian Rupee',
-    'MXN - Mexican Peso',
-    'MDL - Moldovan Leu',
-    'MNT - Mongolian Tugrik',
-    'MAD - Moroccan Dirham',
-    'MZN - Mozambican Metical',
-    'MMK - Myanma Kyat',
-    'NAD - Namibian Dollar',
-    'NPR - Nepalese Rupee',
-    'ANG - Netherlands Antillean Gulden',
-    'TWD - New Taiwan Dollar',
-    'NZD - New Zealand Dollar',
-    'NIO - Nicaraguan Cordoba',
-    'NGN - Nigerian Naira',
-    'KPW - North Korean Won',
-    'NOK - Norwegian Krone',
-    'OMR - Omani Rial',
-    'TOP - Paanga',
-    'PKR - Pakistani Rupee',
-    'PAB - Panamanian Balboa',
-    'PGK - Papua New Guinean Kina',
-    'PYG - Paraguayan Guarani',
-    'PEN - Peruvian Nuevo Sol',
-    'PHP - Philippine Peso',
-    'PLN - Polish Zloty',
-    'QAR - Qatari Riyal',
-    'RON - Romanian Leu',
-    'RUB - Russian Ruble',
-    'RWF - Rwandan Franc',
-    'SHP - Saint Helena Pound',
-    'WST - Samoan Tala',
-    'STD - Sao Tome And Principe Dobra',
-    'SAR - Saudi Riyal',
-    'RSD - Serbian Dinar',
-    'SCR - Seychellois Rupee',
-    'SLL - Sierra Leonean Leone',
-    'SGD - Singapore Dollar',
-    'SBD - Solomon Islands Dollar',
-    'SOS - Somali Shilling',
-    'ZAR - South African Rand',
-    'KRW - South Korean Won',
-    'XDR - Special Drawing Rights',
-    'LKR - Sri Lankan Rupee',
-    'SDG - Sudanese Pound',
-    'SRD - Surinamese Dollar',
-    'SZL - Swazi Lilangeni',
-    'SEK - Swedish Krona',
-    'CHF - Swiss Franc',
-    'SYP - Syrian Pound',
-    'TJS - Tajikistani Somoni',
-    'TZS - Tanzanian Shilling',
-    'THB - Thai Baht',
-    'TTD - Trinidad and Tobago Dollar',
-    'TND - Tunisian Dinar',
-    'TRY - Turkish New Lira',
-    'TMT - Turkmenistan Manat',
-    'AED - UAE Dirham',
-    'UGX - Ugandan Shilling',
-    'UAH - Ukrainian Hryvnia',
-    'USD - United States Dollar',
-    'UYU - Uruguayan Peso',
-    'UZS - Uzbekistani Som',
-    'VUV - Vanuatu Vatu',
-    'VEF - Venezuelan Bolivar',
-    'VND - Vietnamese Dong',
-    'XOF - West African CFA Franc',
-    'YER - Yemeni Rial',
-    'ZMW - Zambian Kwacha'];
 
   String convertInput(String? input, SelectionType type) {
     if (input == null || input.isEmpty) {

lib/Utils/Constants.dart

@@ -6,4 +6,162 @@ const Color colourThree = Color(0xFF2978A0);
 const Color colourFour = Color(0xFF8549ff);
 const Color colourFive = Color(0xFFC6E0FF);
 
-const double PADDING_GLOBAL = 12;
+const double paddingGlobal = 12;
+
+final List<String> listOfCurrencies = <String>[
+  'ALL - Albanian Lek',
+  'AFN - Afghan Afghani',
+  'DZD - Algerian Dinar',
+  'AOA - Angolan Kwanza',
+  'ARS - Argentine Peso',
+  'AMD - Armenian Dram',
+  'AWG - Aruban Florin',
+  'AUD - Australian Dollar',
+  'AZN - Azerbaijani Manat',
+  'BSD - Bahamian Dollar',
+  'BHD - Bahraini Dinar',
+  'BDT - Bangladeshi Taka',
+  'BBD - Barbadian Dollar',
+  'BYR - Belarusian Ruble',
+  'BZD - Belize Dollar',
+  'BTN - Bhutanese Ngultrum',
+  'BTC - Bitcoin',
+  'BOB - Bolivian Boliviano',
+  'BAM - Bosnia And Herzegovina Konvertibilna Marka',
+  'BWP - Botswana Pula',
+  'BRL - Brazilian Real',
+  'GBP - British Pound',
+  'BND - Brunei Dollar',
+  'BGN - Bulgarian Lev',
+  'BIF - Burundi Franc',
+  'KHR - Cambodian Riel',
+  'CAD - Canadian Dollar',
+  'CVE - Cape Verdean Escudo',
+  'KYD - Cayman Islands Dollar',
+  'XAF - Central African CFA Franc',
+  'XPF - CFP Franc',
+  'CLP - Chilean Peso',
+  'CNY - Chinese Yuan',
+  'COP - Colombian Peso',
+  'KMF - Comorian Franc',
+  'CDF - Congolese Franc',
+  'CRC - Costa Rican Colon',
+  'HRK - Croatian Kuna',
+  'CUP - Cuban Peso',
+  'CZK - Czech Koruna',
+  'DKK - Danish Krone',
+  'DJF - Djiboutian Franc',
+  'DOP - Dominican Peso',
+  'XCD - East Caribbean Dollar',
+  'EGP - Egyptian Pound',
+  'ERN - Eritrean Nakfa',
+  'ETB - Ethiopian Birr',
+  'EUR - Euro',
+  'FKP - Falkland Islands Pound',
+  'FJD - Fijian Dollar',
+  'GMD - Gambian Dalasi',
+  'GEL - Georgian Lari',
+  'GHS - Ghanaian Cedi',
+  'GIP - Gibraltar Pound',
+  'GTQ - Guatemalan Quetzal',
+  'GNF - Guinean Franc',
+  'GYD - Guyanese Dollar',
+  'HTG - Haitian Gourde',
+  'HNL - Honduran Lempira',
+  'HKD - Hong Kong Dollar',
+  'HUF - Hungarian Forint',
+  'ISK - Icelandic Kr\u00f3na',
+  'INR - Indian Rupee',
+  'IDR - Indonesian Rupiah',
+  'IRR - Iranian Rial',
+  'IQD - Iraqi Dinar',
+  'ILS - Israeli New Sheqel',
+  'JMD - Jamaican Dollar',
+  'JPY - Japanese Yen',
+  'JOD - Jordanian Dinar',
+  'KZT - Kazakhstani Tenge',
+  'KES - Kenyan Shilling',
+  'KWD - Kuwaiti Dinar',
+  'KGS - Kyrgyzstani Som',
+  'LAK - Lao Kip',
+  'LVL - Latvian Lats',
+  'LBP - Lebanese Lira',
+  'LSL - Lesotho Loti',
+  'LRD - Liberian Dollar',
+  'LYD - Libyan Dinar',
+  'MOP - Macanese Pataca',
+  'MKD - Macedonian Denar',
+  'MGA - Malagasy Ariary',
+  'MWK - Malawian Kwacha',
+  'MYR - Malaysian Ringgit',
+  'MVR - Maldivian Rufiyaa',
+  'MRO - Mauritanian Ouguiya',
+  'MUR - Mauritian Rupee',
+  'MXN - Mexican Peso',
+  'MDL - Moldovan Leu',
+  'MNT - Mongolian Tugrik',
+  'MAD - Moroccan Dirham',
+  'MZN - Mozambican Metical',
+  'MMK - Myanma Kyat',
+  'NAD - Namibian Dollar',
+  'NPR - Nepalese Rupee',
+  'ANG - Netherlands Antillean Gulden',
+  'TWD - New Taiwan Dollar',
+  'NZD - New Zealand Dollar',
+  'NIO - Nicaraguan Cordoba',
+  'NGN - Nigerian Naira',
+  'KPW - North Korean Won',
+  'NOK - Norwegian Krone',
+  'OMR - Omani Rial',
+  'TOP - Paanga',
+  'PKR - Pakistani Rupee',
+  'PAB - Panamanian Balboa',
+  'PGK - Papua New Guinean Kina',
+  'PYG - Paraguayan Guarani',
+  'PEN - Peruvian Nuevo Sol',
+  'PHP - Philippine Peso',
+  'PLN - Polish Zloty',
+  'QAR - Qatari Riyal',
+  'RON - Romanian Leu',
+  'RUB - Russian Ruble',
+  'RWF - Rwandan Franc',
+  'SHP - Saint Helena Pound',
+  'WST - Samoan Tala',
+  'STD - Sao Tome And Principe Dobra',
+  'SAR - Saudi Riyal',
+  'RSD - Serbian Dinar',
+  'SCR - Seychellois Rupee',
+  'SLL - Sierra Leonean Leone',
+  'SGD - Singapore Dollar',
+  'SBD - Solomon Islands Dollar',
+  'SOS - Somali Shilling',
+  'ZAR - South African Rand',
+  'KRW - South Korean Won',
+  'XDR - Special Drawing Rights',
+  'LKR - Sri Lankan Rupee',
+  'SDG - Sudanese Pound',
+  'SRD - Surinamese Dollar',
+  'SZL - Swazi Lilangeni',
+  'SEK - Swedish Krona',
+  'CHF - Swiss Franc',
+  'SYP - Syrian Pound',
+  'TJS - Tajikistani Somoni',
+  'TZS - Tanzanian Shilling',
+  'THB - Thai Baht',
+  'TTD - Trinidad and Tobago Dollar',
+  'TND - Tunisian Dinar',
+  'TRY - Turkish New Lira',
+  'TMT - Turkmenistan Manat',
+  'AED - UAE Dirham',
+  'UGX - Ugandan Shilling',
+  'UAH - Ukrainian Hryvnia',
+  'USD - United States Dollar',
+  'UYU - Uruguayan Peso',
+  'UZS - Uzbekistani Som',
+  'VUV - Vanuatu Vatu',
+  'VEF - Venezuelan Bolivar',
+  'VND - Vietnamese Dong',
+  'XOF - West African CFA Franc',
+  'YER - Yemeni Rial',
+  'ZMW - Zambian Kwacha'
+];

lib/data/prefs/CurrencyPair.dart

@@ -0,0 +1,6 @@
+class CurrencyPair {
+  String? currencyOne;
+  String? currencyTwo;
+
+  CurrencyPair(this.currencyOne, this.currencyTwo);
+}

lib/data/prefs/PreferenceProvider.dart

@@ -0,0 +1,27 @@
+import 'dart:ffi';
+
+import 'package:shared_preferences/shared_preferences.dart';
+
+import 'CurrencyPair.dart';
+
+const String CURRENCY_ONE = "conversion_one";
+const String CURRENCY_TWO = "conversion_two";
+class PreferenceProvider {
+  late final SharedPreferences _prefs;
+
+  Future<void> init() async {
+    _prefs = await SharedPreferences.getInstance();
+  }
+
+  Future<void> saveConversionPair(String s1, String s2) async {
+    await _prefs.setString(CURRENCY_ONE, s1);
+    await _prefs.setString(CURRENCY_TWO, s2);
+  }
+
+  CurrencyPair getConversionPair() {
+    String? s1 = _prefs.getString(CURRENCY_ONE);
+    String? s2 = _prefs.getString(CURRENCY_TWO);
+
+    return CurrencyPair(s1, s2);
+  }
+}

lib/data/repository/Repository.dart

@@ -0,0 +1,6 @@
+import '../prefs/CurrencyPair.dart';
+
+abstract class Repository {
+  CurrencyPair getConversionPair();
+  Future<void> setConversionPair(String fromCurrency, String toCurrency);
+}

lib/data/repository/RepositoryImpl.dart

@@ -0,0 +1,20 @@
+import 'package:easy_cc_flutter/data/prefs/CurrencyPair.dart';
+import 'package:easy_cc_flutter/data/prefs/PreferenceProvider.dart';
+
+import '../../locator.dart';
+import 'Repository.dart';
+
+class RepositoryImpl extends Repository {
+  final PreferenceProvider _prefs = locator<PreferenceProvider>();
+
+  @override
+  CurrencyPair getConversionPair() {
+    return _prefs.getConversionPair();
+  }
+
+  @override
+  Future<void> setConversionPair(String fromCurrency, String toCurrency) {
+    return _prefs.saveConversionPair(fromCurrency, toCurrency);
+  }
+
+}

lib/locator.dart

@@ -0,0 +1,14 @@
+import 'package:easy_cc_flutter/MainViewModel.dart';
+import 'package:easy_cc_flutter/data/repository/RepositoryImpl.dart';
+import 'package:get_it/get_it.dart';
+
+import 'data/prefs/PreferenceProvider.dart';
+
+GetIt locator = GetIt.instance;
+
+void setupLocator() {
+
+  locator.registerLazySingleton(() => PreferenceProvider());
+  locator.registerLazySingleton(() => RepositoryImpl());
+  locator.registerFactory(() => MainViewModel());
+}

lib/main.dart

@@ -1,8 +1,13 @@
 import 'package:flutter/material.dart';
 
 import 'Home.dart';
+import 'data/prefs/PreferenceProvider.dart';
+import 'locator.dart';
 
-void main() {
+void main() async {
+  WidgetsFlutterBinding.ensureInitialized();
+  setupLocator();
+  await locator<PreferenceProvider>().init();
   runApp(const MyApp());
 }
 

lib/views/DropDownBox.dart

@@ -1,14 +1,15 @@
 import 'package:dropdown_search/dropdown_search.dart';
-import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 
 import '../Utils/Constants.dart';
 
 class DropDownBox extends StatelessWidget {
   final List<String> _selection;
+  final String _hintText;
   final Function(String?) _onChanged;
 
-  const DropDownBox(this._selection, this._onChanged, {super.key});
+  const DropDownBox(this._selection, this._hintText, this._onChanged,
+      {super.key});
 
   @override
   Widget build(BuildContext context) {
@@ -18,20 +19,21 @@ class DropDownBox extends StatelessWidget {
       shape: const RoundedRectangleBorder(
           borderRadius: BorderRadius.all(Radius.circular(22))),
       child: DropdownSearch<String>(
-        popupProps: const PopupProps.dialog(showSearchBox: true),
+        popupProps: const PopupProps.dialog(
+            showSearchBox: true,
+            dialogProps: DialogProps(backgroundColor: colourThree)),
         items: _selection,
-        dropdownDecoratorProps: const DropDownDecoratorProps(
+        dropdownDecoratorProps: DropDownDecoratorProps(
           dropdownSearchDecoration: InputDecoration(
-            contentPadding: EdgeInsets.all(14),
+            contentPadding: const EdgeInsets.all(14),
             border: InputBorder.none,
             filled: true,
             fillColor: Colors.transparent,
-            hintText: "Select a currency",
+            hintText: _hintText,
           ),
         ),
         onChanged: _onChanged,
       ),
     );
   }
-
 }

pubspec.lock

@@ -71,6 +71,20 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.3.1"
+  ffi:
+    dependency: transitive
+    description:
+      name: ffi
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.1"
+  file:
+    dependency: transitive
+    description:
+      name: file
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "6.1.4"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -101,7 +115,7 @@ packages:
     source: hosted
     version: "4.6.5"
   get_it:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: get_it
       url: "https://pub.dartlang.org"
@@ -163,6 +177,48 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.8.2"
+  path_provider_linux:
+    dependency: transitive
+    description:
+      name: path_provider_linux
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.7"
+  path_provider_platform_interface:
+    dependency: transitive
+    description:
+      name: path_provider_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.4"
+  path_provider_windows:
+    dependency: transitive
+    description:
+      name: path_provider_windows
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.3"
+  platform:
+    dependency: transitive
+    description:
+      name: platform
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.1.0"
+  plugin_platform_interface:
+    dependency: transitive
+    description:
+      name: plugin_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.2"
+  process:
+    dependency: transitive
+    description:
+      name: process
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "4.2.4"
   provider:
     dependency: transitive
     description:
@@ -177,6 +233,62 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.13.0"
+  shared_preferences:
+    dependency: "direct main"
+    description:
+      name: shared_preferences
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.15"
+  shared_preferences_android:
+    dependency: transitive
+    description:
+      name: shared_preferences_android
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.12"
+  shared_preferences_ios:
+    dependency: transitive
+    description:
+      name: shared_preferences_ios
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.1"
+  shared_preferences_linux:
+    dependency: transitive
+    description:
+      name: shared_preferences_linux
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.1"
+  shared_preferences_macos:
+    dependency: transitive
+    description:
+      name: shared_preferences_macos
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.4"
+  shared_preferences_platform_interface:
+    dependency: transitive
+    description:
+      name: shared_preferences_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0"
+  shared_preferences_web:
+    dependency: transitive
+    description:
+      name: shared_preferences_web
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.4"
+  shared_preferences_windows:
+    dependency: transitive
+    description:
+      name: shared_preferences_windows
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.1"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -280,6 +392,20 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.3"
+  win32:
+    dependency: transitive
+    description:
+      name: win32
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.0"
+  xdg_directories:
+    dependency: transitive
+    description:
+      name: xdg_directories
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.2.0+2"
 sdks:
   dart: ">=2.18.0-190.0.dev <3.0.0"
-  flutter: ">=1.20.0"
+  flutter: ">=3.0.0"

pubspec.yaml

@@ -42,6 +42,8 @@ dependencies:
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^1.0.2
+  shared_preferences: ^2.0.15
+  get_it: ^7.2.0
 
 dev_dependencies:
   flutter_test: