lib/injection/dependency_injection.dart

@@ -1,7 +1,7 @@
 enum Flavor { MOCK, PRO }
 
 class Injector {
-  static Flavor _flavor;
+  static late Flavor _flavor;
 
   static void configure(Flavor flavor) {
     _flavor = flavor;

lib/models/expenses.dart

@@ -3,8 +3,8 @@ class Expenses {
   String amount;
   String percentage;
   Expenses({
-    this.type,
+    required this.type,
-    this.amount,
+    required this.amount,
-    this.percentage,
+    required this.percentage,
   });
 }

lib/models/healthSteam.dart

@@ -6,11 +6,11 @@ class HealthSteam {
   String oneGramGoldPriceInLira;
 
   HealthSteam({
-    this.type,
+    required this.type,
-    this.valueInPercentage,
+    required this.valueInPercentage,
-    this.goldInGram,
+    required this.goldInGram,
-    this.goldPriceInTurkishLira,
+    required this.goldPriceInTurkishLira,
-    this.oneGramGoldPriceInLira,
+    required this.oneGramGoldPriceInLira,
   });
 
   HealthSteam.fromJson(Map<dynamic, dynamic> map)

lib/models/transaction.dart

@@ -1,7 +1,8 @@
 class Category {
   String name;
   String color;
-  Category({this.name, this.color});
+
+  Category({required this.name, required this.color});
 
   Category.formJson(Map<String, dynamic> map)
       : name = map["name"],
@@ -16,7 +17,11 @@ class Transaction {
   Category category;
 
   Transaction(
-      {this.amount, this.description, this.date, this.name, this.category});
+      {required this.amount,
+      required this.description,
+      required this.date,
+      required this.name,
+      required this.category});
 
   Transaction.fromJson(Map<String, dynamic> map)
       : category = Category.formJson(map["category"]),

lib/models/user.dart

@@ -4,5 +4,11 @@ class User {
   String email;
   String token;
 
-  User({this.userId, this.name, this.email, this.token});
+  static final User noUser = User(userId: 0, name: '', email: '', token: '');
+
+  User(
+      {required this.userId,
+      required this.name,
+      required this.email,
+      required this.token});
 }

lib/models/wallet.dart

@@ -11,14 +11,16 @@ class Wallet {
   List<HealthSteam> healthStreams;
   List<Expenses> expensesChart;
 
+  static final Wallet emptyWallet = Wallet._empty();
+
   Wallet({
-    this.totalAssets,
+    required this.totalAssets,
-    this.totalTurkishLiraPool,
+    required this.totalTurkishLiraPool,
-    this.totalGoldInGram,
+    required this.totalGoldInGram,
-    this.totalGoldInTurkishLira,
+    required this.totalGoldInTurkishLira,
-    this.healthSteamDay,
+    required this.healthSteamDay,
-    this.healthStreams,
+    required this.healthStreams,
-    this.expensesChart,
+    required this.expensesChart,
   });
 
   Wallet.fromMap(Map<String, dynamic> map)
@@ -29,5 +31,15 @@ class Wallet {
         healthSteamDay = map["health_stream_day"],
         healthStreams = (map["health_stream"] as List)
             .map((i) => HealthSteam.fromJson(i))
-            .toList();
+            .toList(),
+        expensesChart = [];
+
+  Wallet._empty():
+        totalAssets = '',
+        totalTurkishLiraPool = '',
+        totalGoldInGram = '',
+        totalGoldInTurkishLira = '',
+        healthSteamDay = '',
+        healthStreams = [],
+        expensesChart = [];
 }

lib/providers/auth_provider.dart

@@ -18,7 +18,7 @@ class AuthProvider with ChangeNotifier {
   Status get loggedInStatus => _loggedInStatus;
   Status get registeredInStatus => _registeredInStatus;
 
-  Future<Map<String, dynamic>> login(String email, int pinCode) async {
+  Future login(String email, int pinCode) async {
     var result;
 
     final Map<String, dynamic> loginData = {

lib/providers/transaction_provider.dart

@@ -3,32 +3,28 @@ import 'package:robo_advisory/models/transaction.dart';
 import 'package:robo_advisory/repository/transaction.repository.dart';
 
 class TransactionProvider with ChangeNotifier {
-  String _selectedCategory = "All";
+  String? _selectedCategory;
-  List<Transaction> _transactionsData;
+  List<Transaction> _transactionsData = [];
-  List<Transaction> _transactionsList;
 
   List<Transaction> get transactionList {
-    if (_selectedCategory != 'All') {
+    if (_selectedCategory == null) {
-      return _transactionsList = _transactionsData
+      return _transactionsData;
-          .where((transaction) =>
-              transaction.category.name == _selectedCategory.toLowerCase())
-          .toList();
-    } else {
-      return _transactionsList = _transactionsData;
     }
+    return _transactionsData
+        .where((transaction) =>
+            transaction.category.name == _selectedCategory?.toLowerCase())
+        .toList();
   }
 
   void setTransactionsList(List<Transaction> transactions) {
     _transactionsData = transactions;
-    _transactionsList = transactions;
     notifyListeners();
   }
 
-  String get selectedCategory => _selectedCategory;
+  String? get selectedCategory => _selectedCategory;
 
-  void setSelectedCategory(String category) {
+  void setSelectedCategory(String? category) {
     _selectedCategory = category;
-    print(_selectedCategory);
     notifyListeners();
   }
 

lib/providers/user_provider.dart

@@ -2,7 +2,7 @@ import 'package:flutter/foundation.dart';
 import 'package:robo_advisory/models/user.dart';
 
 class UserProvider with ChangeNotifier {
-  User _user = new User();
+  User _user = User.noUser;
   int _selectedTabIndex = 0;
 
   List<String> _categories = ["All", "Workplace", "Equipment", "Home", "Other"];

lib/providers/wallet_provider.dart

@@ -3,7 +3,7 @@ import 'package:robo_advisory/models/wallet.dart';
 import 'package:robo_advisory/repository/wallet.repository.dart';
 
 class WalletProvider with ChangeNotifier {
-  Wallet _wallet = new Wallet();
+  Wallet _wallet = Wallet.emptyWallet;
 
   Wallet get wallet => _wallet;
 

lib/screens/dashboard/dashboard.dart

@@ -17,7 +17,7 @@ class _DashboardScreenState extends State<DashboardScreen> {
   final GlobalKey<ScaffoldState> _scaffoldKey = GlobalKey<ScaffoldState>();
 
   void _openEndDrawer() {
-    _scaffoldKey.currentState.openEndDrawer();
+    _scaffoldKey.currentState?.openEndDrawer();
   }
 
   @override

lib/screens/dashboard/local_widgets/bottom_navigation.dart

@@ -3,7 +3,7 @@ import 'package:robo_advisory/theme/icons.dart';
 import 'package:flutter_svg/flutter_svg.dart';
 
 class BottomNavigation extends StatelessWidget {
-  BottomNavigation({@required this.selectedIndex, @required this.onItemTapped});
+  BottomNavigation({required this.selectedIndex, required this.onItemTapped});
   final int selectedIndex;
   final Function onItemTapped;
   @override
@@ -48,7 +48,7 @@ class BottomNavigation extends StatelessWidget {
       showSelectedLabels: false,
       showUnselectedLabels: false,
       currentIndex: selectedIndex,
-      onTap: onItemTapped,
+      onTap: (v) => onItemTapped(v),
     );
   }
 }

lib/screens/history/history.dart

@@ -17,24 +17,20 @@ class HistoryScreen extends StatefulWidget {
 
 class _HistoryScreenState extends State<HistoryScreen> {
   bool loadingData = true;
-  List<Transaction> transactionData;
+  List<Transaction> transactionData = [];
 
   void initState() {
     TransactionProvider transactionProvider =
         Provider.of<TransactionProvider>(context, listen: false);
     transactionProvider.loadTransactions().then((value) {
-      if (value != null) {
+      Timer(Duration(seconds: 3), () {
-        Timer(Duration(seconds: 3), () {
+        setState(() {
-          setState(() {
+          loadingData = false;
-            loadingData = false;
+          transactionData = value;
-            transactionData = value;
+          Provider.of<TransactionProvider>(context, listen: false)
-            Provider.of<TransactionProvider>(context, listen: false)
+              .setTransactionsList(transactionData);
-                .setTransactionsList(transactionData);
-          });
         });
-      }
+      });
-
-      print(value);
     });
     super.initState();
   }
@@ -71,9 +67,10 @@ class _HistoryScreenState extends State<HistoryScreen> {
                         }).toList(),
                         hint: new Text("Select Category"),
                         value: Provider.of<TransactionProvider>(context,
-                                listen: true)
+                                    listen: true)
-                            .selectedCategory,
+                                .selectedCategory ??
-                        onChanged: (String newValue) {
+                            'All',
+                        onChanged: (String? newValue) {
                           Provider.of<TransactionProvider>(context,
                                   listen: false)
                               .setSelectedCategory(newValue);

lib/screens/history/local_widgets/transaction_list_tile.dart

@@ -4,7 +4,9 @@ import 'package:robo_advisory/utils/helpers.dart';
 
 class TransactionListTile extends StatelessWidget {
   final Transaction transactionObject;
-  TransactionListTile({this.transactionObject});
+
+  TransactionListTile({required this.transactionObject});
+
   @override
   Widget build(BuildContext context) {
     return Column(

lib/screens/home/home.dart

@@ -12,7 +12,7 @@ import 'package:robo_advisory/screens/home/local_widgets/expenses_chart.dart';
 import 'dart:async';
 
 class HomeScreen extends StatefulWidget {
-  HomeScreen({@required this.toggleDrawer});
+  HomeScreen({required this.toggleDrawer});
   final Function toggleDrawer;
   @override
   _HomeScreenState createState() => _HomeScreenState();
@@ -20,13 +20,13 @@ class HomeScreen extends StatefulWidget {
 
 class _HomeScreenState extends State<HomeScreen> {
   bool loadingData = true;
-  Wallet walletData;
+  Wallet walletData = Wallet.emptyWallet;
 
   void initState() {
     WalletProvider walletProvider =
         Provider.of<WalletProvider>(context, listen: false);
     walletProvider.loadWallet().then((value) {
-      if (value.totalAssets != null) {
+      if (value.totalAssets.isNotEmpty) {
         Timer(Duration(seconds: 3), () {
           setState(() {
             loadingData = false;
@@ -70,7 +70,7 @@ class _HomeScreenState extends State<HomeScreen> {
                             ),
                           ),
                           GestureDetector(
-                            onTap: widget.toggleDrawer,
+                            onTap: () => widget.toggleDrawer(),
                             child: Icon(Icons.more_vert),
                           ),
                         ],

lib/screens/home/local_widgets/expenses_chart.dart

@@ -10,7 +10,7 @@ class ExpensesChart extends StatefulWidget {
 }
 
 class ExpensesChartState extends State {
-  int touchedIndex;
+  int? touchedIndex;
 
   @override
   Widget build(BuildContext context) {
@@ -21,18 +21,22 @@ class ExpensesChartState extends State {
         Expanded(
           child: PieChart(
             PieChartData(
-                pieTouchData: PieTouchData(touchCallback: (pieTouchResponse) {
+                pieTouchData:
+                    PieTouchData(touchCallback: (event, pieTouchResponse) {
+                  if (pieTouchResponse == null) return;
+
                   setState(() {
-                    if (pieTouchResponse.touchInput is FlLongPressEnd ||
+                    if (event is FlLongPressEnd || event is FlPanEndEvent) {
-                        pieTouchResponse.touchInput is FlPanEnd) {
                       touchedIndex = -1;
                     } else {
-                      touchedIndex = pieTouchResponse.touchedSectionIndex;
+                      touchedIndex =
+                          pieTouchResponse.touchedSection?.touchedSectionIndex;
+
                       if (touchedIndex != null) {
                         Provider.of<UserProvider>(context, listen: false)
                             .setSelectedTabIndex(3);
                         Provider.of<TransactionProvider>(context, listen: false)
-                            .setSelectedCategory(categories[touchedIndex + 1]);
+                            .setSelectedCategory(categories[touchedIndex! + 1]);
                       }
                     }
                   });
@@ -50,58 +54,31 @@ class ExpensesChartState extends State {
   }
 
   List<PieChartSectionData> showingSections() {
-    return List.generate(4, (i) {
+    final colorsDict = [0xff0293ee, 0xfff8b250, 0xff13d38e, 0xff845bef];
-      final isTouched = i == touchedIndex;
+    final values = [50.0, 12.0, 13.0, 25.0];
-      final double fontSize = isTouched ? 25 : 16;
+
-      final double radius = isTouched ? 60 : 50;
+    return values
-      switch (i) {
+        .asMap()
-        case 0:
+        .entries
-          return PieChartSectionData(
+        .map((entry) => _pieChartSectionData(
-            color: const Color(0xff0293ee),
+            colorsDict[entry.key], entry.value, touchedIndex == entry.key))
-            value: 50,
+        .toList();
-            title: '50%',
+  }
-            radius: radius,
+
-            titleStyle: TextStyle(
+  PieChartSectionData _pieChartSectionData(
-                fontSize: fontSize,
+      int color, double value, bool isTouched) {
-                fontWeight: FontWeight.bold,
+    final double fontSize = isTouched ? 25 : 16;
-                color: const Color(0xffffffff)),
+    final double radius = isTouched ? 60 : 50;
-          );
+
-        case 1:
+    return PieChartSectionData(
-          return PieChartSectionData(
+      color: Color(color),
-            color: const Color(0xfff8b250),
+      value: value,
-            value: 12,
+      title: value.toString() + '%',
-            title: '12%',
+      radius: radius,
-            radius: radius,
+      titleStyle: TextStyle(
-            titleStyle: TextStyle(
+          fontSize: fontSize,
-                fontSize: fontSize,
+          fontWeight: FontWeight.bold,
-                fontWeight: FontWeight.bold,
+          color: const Color(0xffffffff)),
-                color: const Color(0xffffffff)),
+    );
-          );
-        case 2:
-          return PieChartSectionData(
-            color: const Color(0xff13d38e),
-            value: 13,
-            title: '13%',
-            radius: radius,
-            titleStyle: TextStyle(
-                fontSize: fontSize,
-                fontWeight: FontWeight.bold,
-                color: const Color(0xffffffff)),
-          );
-        case 3:
-          return PieChartSectionData(
-            color: const Color(0xff845bef),
-            value: 25,
-            title: '25%',
-            radius: radius,
-            titleStyle: TextStyle(
-                fontSize: fontSize,
-                fontWeight: FontWeight.bold,
-                color: const Color(0xffffffff)),
-          );
-        default:
-          return null;
-      }
-    });
   }
 }

lib/screens/home/local_widgets/financial_health_stream.dart

@@ -4,7 +4,7 @@ import 'package:google_fonts/google_fonts.dart';
 import 'package:flutter_custom_dialog/flutter_custom_dialog.dart';
 
 class FinancialHealthStream extends StatelessWidget {
-  FinancialHealthStream({@required this.healthSteams});
+  FinancialHealthStream({required this.healthSteams});
   final List<HealthSteam> healthSteams;
 
   double calculatePercentage(double fullWidth, int percentValue) {

lib/screens/login.dart

@@ -76,6 +76,7 @@ class LoginScreen extends StatelessWidget {
                         Padding(
                           padding: EdgeInsets.only(left: 10.0, right: 10.0),
                           child: PinCodeTextField(
+                            appContext: context,
                             length: 5,
                             cursorColor: Colors.black,
                             animationType: AnimationType.fade,

lib/screens/register/register_step_1.dart

@@ -44,6 +44,7 @@ class RegisterFirstScreen extends StatelessWidget {
                   Padding(
                     padding: EdgeInsets.only(left: 10.0, right: 10.0),
                     child: PinCodeTextField(
+                      appContext: context,
                       length: 5,
                       cursorColor: Colors.black,
                       backgroundColor: Colors.white,
@@ -75,6 +76,7 @@ class RegisterFirstScreen extends StatelessWidget {
                           scale: 0.8,
                           child: Switch(
                             value: false,
+                            onChanged: (_) {},
                           ),
                         ),
                         Text('Remember me')

lib/utils/constants.dart

@@ -14,7 +14,7 @@ final otpPinTheme = PinTheme(
   fieldWidth: 50,
 );
 
-InputDecoration roboInputDecoration({String placeholderHint}) {
+InputDecoration roboInputDecoration({String? placeholderHint}) {
   return InputDecoration(
     filled: true,
     fillColor: Colors.white,

lib/utils/size_config.dart

@@ -1,30 +1,30 @@
-import 'package:flutter/material.dart';
+// import 'package:flutter/material.dart';
-
+//
-class SizeConfig {
+// class SizeConfig {
-  static MediaQueryData _mediaQueryData;
+//   static MediaQueryData _mediaQueryData;
-  static double screenWidth;
+//   static double screenWidth;
-  static double screenHeight;
+//   static double screenHeight;
-  static double defaultSize;
+//   static double defaultSize;
-  static Orientation orientation;
+//   static Orientation orientation;
-
+//
-  void init(BuildContext context) {
+//   void init(BuildContext context) {
-    _mediaQueryData = MediaQuery.of(context);
+//     _mediaQueryData = MediaQuery.of(context);
-    screenWidth = _mediaQueryData.size.width;
+//     screenWidth = _mediaQueryData.size.width;
-    screenHeight = _mediaQueryData.size.height;
+//     screenHeight = _mediaQueryData.size.height;
-    orientation = _mediaQueryData.orientation;
+//     orientation = _mediaQueryData.orientation;
-  }
+//   }
-}
+// }
-
+//
-// Get the proportionate height as per screen size
+// // Get the proportionate height as per screen size
-double getProportionateScreenHeight(double inputHeight) {
+// double getProportionateScreenHeight(double inputHeight) {
-  double screenHeight = SizeConfig.screenHeight;
+//   double screenHeight = SizeConfig.screenHeight;
-  // 812 is the layout height that designer use
+//   // 812 is the layout height that designer use
-  return (inputHeight / 812.0) * screenHeight;
+//   return (inputHeight / 812.0) * screenHeight;
-}
+// }
-
+//
-// Get the proportionate height as per screen size
+// // Get the proportionate height as per screen size
-double getProportionateScreenWidth(double inputWidth) {
+// double getProportionateScreenWidth(double inputWidth) {
-  double screenWidth = SizeConfig.screenWidth;
+//   double screenWidth = SizeConfig.screenWidth;
-  // 375 is the layout width that designer use
+//   // 375 is the layout width that designer use
-  return (inputWidth / 375.0) * screenWidth;
+//   return (inputWidth / 375.0) * screenWidth;
-}
+// }

lib/widgets/drawer.dart

@@ -46,6 +46,7 @@ class AppDrawer extends StatelessWidget {
             _createDrawerItem(
               icon: accountIcon,
               text: 'Account',
+              onTap: () {},
             ),
             _createDrawerItem(
               icon: logoutIcon,
@@ -125,7 +126,7 @@ class AppDrawer extends StatelessWidget {
   }
 
   Widget _createDrawerItem(
-      {String icon, String text, GestureTapCallback onTap}) {
+      {required String icon, required String text, required GestureTapCallback onTap}) {
     return ListTile(
       title: Row(
         children: <Widget>[