- Introduction on base view model and stateless widget classes

- Implementation of firebase
- Implementation of dependency injection

Took 11 hours 26 minutes

lib/Utils/ViewUtils.dart

@@ -0,0 +1,13 @@
+import 'package:flutter/cupertino.dart';
+import 'package:toast/toast.dart';
+
+class ViewUtils{
+
+  static displayToast(BuildContext context, String message){
+    Toast.show(
+        message, context,
+        duration: Toast.LENGTH_SHORT,
+        gravity:  Toast.BOTTOM
+    );
+  }
+}

lib/base/BaseModel.dart

@@ -0,0 +1,41 @@
+import 'dart:async';
+
+import 'package:days_left/data/ViewState.dart';
+import 'package:stacked/stacked.dart';
+
+class BaseModel extends BaseViewModel {
+  ViewState _viewState = Idle();
+
+  ViewState get viewState => _viewState;
+
+  void onStart() {
+    _viewState = HasStarted();
+    notifyListeners();
+  }
+
+  void onSuccess(dynamic data) {
+    _viewState = HasData(data);
+    notifyListeners();
+  }
+
+  void onError(String error) {
+    _viewState = HasError(error);
+    notifyListeners();
+  }
+
+  void handleFuture(Future<dynamic> func) {
+    onStart();
+    func.then((value) => onSuccess(value)).catchError((error) {
+      print(error);
+      onError(error);
+    });
+  }
+
+  void handleStream(Stream<dynamic> stream) {
+    stream.listen((event) {
+      onSuccess(event);
+    }).onError((handleError) {
+      onError(handleError);
+    });
+  }
+}

lib/base/BaseStatelessWidget.dart

@@ -0,0 +1,32 @@
+import 'package:days_left/Utils/ViewUtils.dart';
+import 'package:days_left/data/ViewState.dart';
+import 'BaseModel.dart';
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+import 'package:stacked/stacked.dart';
+
+abstract class BaseStatelessWidget extends StatelessWidget {
+  BaseModel getBaseModel();
+  Widget displayWidget(context, model, child);
+
+  @override
+  Widget build(BuildContext parent) {
+    return ViewModelBuilder<BaseModel>.reactive(
+        builder: (context, model, child) {
+          var state = model.viewState;
+
+          if (state is HasStarted)
+            return Center(
+              child: CircularProgressIndicator(),
+            );
+          else if (state is HasError)
+            WidgetsBinding.instance.addPostFrameCallback(
+                    (_) => ViewUtils.displayToast(parent, state.error));
+
+          return Center(
+            child: displayWidget(context, model, child),
+          );
+        },
+        viewModelBuilder: () => getBaseModel());
+  }
+}

lib/constants/constants.dart

@@ -0,0 +1,12 @@
+const String PhoneNoViewRoute = "PhoneNo";
+const String CodeViewRoute = "Code";
+const String HomeViewRoute = "Home";
+const String UpdateDetailsViewRoute = "UpdateDetails";
+const String AddTestsViewRoute = "AddTests";
+const String TestListViewRoute = "TestList";
+const String TestOverviewViewRoute = "TestOverview";
+const String LoginViewRoute = "Login";
+
+const String HasStarted = "hasStarted";
+const String HasData = "hasData";
+const String HasError = "hasError";

lib/data/FirebaseAuthData.dart

@@ -0,0 +1,49 @@
+// import 'package:firebase_auth/firebase_auth.dart';
+
+import 'package:firebase_auth/firebase_auth.dart';
+
+class FirebaseAuthData {
+  final FirebaseAuth firebaseAuth = FirebaseAuth.instance;
+
+  User getUser() {
+    return firebaseAuth.currentUser;
+  }
+
+  String getUid() {
+    return getUser()?.uid;
+  }
+
+  Future<UserCredential> signUpWithEmailAndPassword(
+      String email, String password) {
+    return firebaseAuth.createUserWithEmailAndPassword(
+        email: email, password: password);
+  }
+
+  Future<UserCredential> signIn(String email, String password) {
+    return firebaseAuth.signInWithEmailAndPassword(
+        email: email, password: password);
+  }
+
+  Future<void> resetPassword(String email) {
+    return firebaseAuth.sendPasswordResetEmail(email: email);
+  }
+
+  Future<void> signOut() {
+    return firebaseAuth.signOut();
+  }
+
+  Future<void> updateUsername(String newEmail) {
+    return getUser().updateEmail(newEmail);
+  }
+
+  Future<void> updatePassword(
+      String email, String password, String newPassword) async {
+    UserCredential credentials = await signIn(email, password);
+    return credentials.user.updatePassword(newPassword);
+  }
+
+  Future<void> updateProfile({String displayName, String photoURL}) {
+    return getUser()
+        .updateProfile(displayName: displayName, photoURL: photoURL);
+  }
+}

lib/data/ViewState.dart

@@ -0,0 +1,20 @@
+import 'package:sealed_class/sealed_class.dart';
+
+@Sealed([Idle, HasStarted, HasData, HasError])
+abstract class ViewState {}
+
+class Idle implements ViewState {}
+
+class HasStarted implements ViewState {}
+
+class HasData implements ViewState {
+  final dynamic data;
+
+  HasData(this.data);
+}
+
+class HasError implements ViewState {
+  final String error;
+
+  HasError(this.error);
+}

lib/locator.dart

@@ -0,0 +1,17 @@
+import 'package:days_left/viewmodels/LoginViewModel.dart';
+import 'package:days_left/viewmodels/UserAuthViewModel.dart';
+import 'package:get_it/get_it.dart';
+import 'data/FirebaseAuthData.dart';
+import 'services/DialogService.dart';
+import 'services/NavigationService.dart';
+
+GetIt locator = GetIt.instance;
+
+void setupLocator() {
+  final FirebaseAuthData firebaseSource = FirebaseAuthData();
+
+  locator.registerLazySingleton(() => NavigationService());
+  locator.registerLazySingleton(() => DialogService());
+  locator.registerLazySingleton(() => UserAuthViewModel(firebaseSource));
+  locator.registerLazySingleton(() => LoginViewModel(firebaseSource));
+}

lib/login/LoginScreen.dart

@@ -0,0 +1,336 @@
+import 'package:days_left/base/BaseModel.dart';
+import 'package:days_left/base/BaseStatelessWidget.dart';
+import 'package:days_left/login/forgot_password_6.dart';
+import 'package:days_left/login/signup_screen_6.dart';
+import 'package:days_left/login/values/values.dart';
+import 'package:days_left/login/widgets/custom_button.dart';
+import 'package:days_left/login/widgets/custom_divider.dart';
+import 'package:days_left/login/widgets/custom_text_form_field.dart';
+import 'package:days_left/login/widgets/spaces.dart';
+import 'package:days_left/viewmodels/LoginViewModel.dart';
+import 'package:flutter/material.dart';
+
+import '../locator.dart';
+
+class LoginScreen extends BaseStatelessWidget {
+  @override
+  BaseModel getBaseModel() {
+    final LoginViewModel _userAuthViewModel = locator<LoginViewModel>();
+    return _userAuthViewModel;
+  }
+
+  @override
+  Widget displayWidget(context, model, child) {
+    ThemeData theme = Theme.of(context);
+    var heightOfScreen = MediaQuery.of(context).size.height;
+    var widthOfScreen = MediaQuery.of(context).size.width;
+    return Scaffold(
+      body: Container(
+        child: Stack(
+          children: <Widget>[
+            _buildHeader(context),
+            Container(
+              margin: EdgeInsets.only(top: heightOfScreen * 0.2),
+              decoration: BoxDecoration(
+                color: AppColors.white,
+                borderRadius: BorderRadius.only(
+                  topLeft: Radius.circular(Sizes.RADIUS_24),
+                  topRight: Radius.circular(Sizes.RADIUS_24),
+                ),
+              ),
+              child: ListView(
+                children: <Widget>[
+                  Container(
+                    margin:
+                    EdgeInsets.symmetric(horizontal: widthOfScreen * 0.1),
+                    child: Column(
+                      crossAxisAlignment: CrossAxisAlignment.start,
+                      children: <Widget>[
+                        Text(
+                          StringConst.LOG_IN,
+                          style: theme.textTheme.headline4.copyWith(
+                            color: AppColors.black,
+                          ),
+                        ),
+                        SpaceH8(),
+                        CustomDivider(
+                          color: AppColors.violetShade2,
+                          height: Sizes.HEIGHT_3,
+                          width: Sizes.WIDTH_40,
+                        ),
+                        SpaceH20(),
+                        Text(
+                          StringConst.LOGIN_MSG,
+                          style: theme.textTheme.bodyText1.copyWith(
+                            color: AppColors.greyShade8,
+                            fontWeight: FontWeight.w600,
+                            fontSize: Sizes.TEXT_SIZE_14,
+                          ),
+                        ),
+                        SpaceH24(),
+                        _buildForm(context),
+                      ],
+                    ),
+                  ),
+                ],
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
+
+  Widget _buildHeader(context) {
+    ThemeData theme = Theme.of(context);
+    var heightOfScreen = MediaQuery.of(context).size.height;
+    var widthOfScreen = MediaQuery.of(context).size.width;
+    return Stack(
+      children: <Widget>[
+        Image.asset(
+          ImagePath.SPLASH_1,
+          height: heightOfScreen * 0.3,
+          width: widthOfScreen,
+          fit: BoxFit.cover,
+        ),
+        Container(
+          height: heightOfScreen * 0.3,
+          width: widthOfScreen,
+          decoration: BoxDecoration(gradient: Gradients.headerOverlayGradient),
+        ),
+        Container(
+          margin: EdgeInsets.only(
+            top: heightOfScreen * 0.075,
+            left: widthOfScreen * 0.1,
+          ),
+          child: Text(
+            StringConst.APP_NAME,
+            style: theme.textTheme.headline4.copyWith(
+              color: AppColors.white,
+            ),
+          ),
+        ),
+      ],
+    );
+  }
+
+  Widget _buildForm(context) {
+    ThemeData theme = Theme.of(context);
+    var heightOfScreen = MediaQuery.of(context).size.height;
+    var widthOfScreen = MediaQuery.of(context).size.width;
+    return Column(
+      children: <Widget>[
+        CustomTextFormField(
+          textInputType: TextInputType.text,
+          hintTextStyle: Styles.customTextStyle(color: AppColors.greyShade8),
+          textStyle: Styles.customTextStyle(color: AppColors.greyShade8),
+          labelText: StringConst.EMAIL,
+          labelStyle: theme.textTheme.subtitle1.copyWith(
+            color: AppColors.violetShade2,
+          ),
+          hasSuffixIcon: true,
+          suffixIcon: Icon(
+            Icons.mail,
+            color: AppColors.greyShade8,
+          ),
+          border:
+          Borders.customOutlineInputBorder(borderRadius: Sizes.RADIUS_4),
+          enabledBorder:
+          Borders.customOutlineInputBorder(borderRadius: Sizes.RADIUS_4),
+          focusedBorder: Borders.customOutlineInputBorder(
+            borderRadius: Sizes.RADIUS_4,
+            color: AppColors.violetShade2,
+            width: Sizes.WIDTH_2,
+          ),
+          hintText: StringConst.EMAIL,
+        ),
+        SpaceH20(),
+        CustomTextFormField(
+          textInputType: TextInputType.text,
+          hintTextStyle: Styles.customTextStyle(
+            color: AppColors.greyShade8,
+          ),
+          textStyle: Styles.customTextStyle(color: AppColors.greyShade8),
+          labelText: StringConst.PASSWORD,
+          labelStyle: theme.textTheme.subtitle1.copyWith(
+            color: AppColors.violetShade2,
+          ),
+          hintText: StringConst.PASSWORD_HINT_TEXT,
+          hasSuffixIcon: true,
+          suffixIcon: Icon(
+            Icons.lock,
+            color: AppColors.greyShade8,
+          ),
+          border:
+          Borders.customOutlineInputBorder(borderRadius: Sizes.RADIUS_4),
+          enabledBorder:
+          Borders.customOutlineInputBorder(borderRadius: Sizes.RADIUS_4),
+          focusedBorder: Borders.customOutlineInputBorder(
+            borderRadius: Sizes.RADIUS_4,
+            color: AppColors.violetShade2,
+            width: Sizes.WIDTH_2,
+          ),
+          obscured: true,
+        ),
+        SpaceH16(),
+        GestureDetector(
+          onTap: () => Navigator.push(
+            context,
+            MaterialPageRoute(
+              builder: (context) => ForgotPasswordScreen6(),
+            ),
+          ),
+          child: Row(
+            mainAxisAlignment: MainAxisAlignment.end,
+            children: <Widget>[
+              Text(
+                StringConst.FORGOT_PASSWORD,
+                style: theme.textTheme.subtitle1.copyWith(
+                  color: AppColors.black,
+                  fontSize: Sizes.TEXT_SIZE_14,
+                ),
+              ),
+            ],
+          ),
+        ),
+        SpaceH24(),
+        CustomButton(
+          title: StringConst.LOG_IN,
+          color: AppColors.violetShade2,
+          borderRadius: Sizes.ELEVATION_4,
+          textStyle: theme.textTheme.button.copyWith(
+            color: AppColors.white,
+            fontSize: Sizes.TEXT_SIZE_16,
+          ),
+          onPressed: () {},
+        ),
+        SizedBox(
+          height: heightOfScreen * 0.03,
+        ),
+        _buildSeparator(context),
+        SizedBox(
+          height: heightOfScreen * 0.03,
+        ),
+        Row(
+          children: <Widget>[
+            Expanded(
+              child: CustomButton(
+                title: StringConst.FACEBOOK,
+                textStyle: theme.textTheme.button
+                    .copyWith(color: AppColors.greyShade8),
+                hasIcon: true,
+                color: AppColors.white,
+                elevation: Sizes.ELEVATION_0,
+                borderRadius: Sizes.ELEVATION_4,
+                borderSide: Borders.customBorder(color: AppColors.grey),
+                icon: Image.asset(
+                  ImagePath.FACEBOOK,
+                  height: Sizes.HEIGHT_24,
+                  width: Sizes.WIDTH_24,
+                ),
+                onPressed: () {},
+              ),
+            ),
+            SizedBox(width: widthOfScreen * 0.1),
+            Expanded(
+              child: CustomButton(
+                title: StringConst.GOOGLE,
+                hasIcon: true,
+                color: AppColors.white,
+                elevation: Sizes.ELEVATION_0,
+                borderRadius: Sizes.ELEVATION_4,
+                borderSide: Borders.customBorder(color: AppColors.grey),
+                textStyle: theme.textTheme.button
+                    .copyWith(color: AppColors.greyShade8),
+                icon: Image.asset(
+                  ImagePath.GOOGLE,
+                  height: Sizes.HEIGHT_24,
+                  width: Sizes.WIDTH_24,
+                ),
+                onPressed: () {},
+              ),
+            )
+          ],
+        ),
+        SizedBox(
+          height: heightOfScreen * 0.08,
+        ),
+        Row(
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: <Widget>[
+            Text(
+              StringConst.DONT_HAVE_AN_ACCOUNT,
+              style: theme.textTheme.bodyText1.copyWith(
+                color: AppColors.black,
+                fontWeight: FontWeight.w600,
+                fontSize: Sizes.TEXT_SIZE_14,
+              ),
+            ),
+            SpaceW4(),
+            GestureDetector(
+              onTap: () => Navigator.push(
+                context,
+                MaterialPageRoute(
+                  builder: (context) => SignUpScreen6(),
+                ),
+              ),
+              child: Column(
+                mainAxisAlignment: MainAxisAlignment.end,
+                crossAxisAlignment: CrossAxisAlignment.start,
+                children: <Widget>[
+                  Text(
+                    StringConst.SIGN_UP,
+                    style: theme.textTheme.headline4.copyWith(
+                      color: AppColors.orangeShade5,
+                      fontSize: Sizes.TEXT_SIZE_14,
+                      fontWeight: FontWeight.w600,
+                    ),
+                  ),
+                  SpaceH2(),
+                  CustomDivider(
+                    color: AppColors.orangeShade5,
+                    height: Sizes.HEIGHT_2,
+                    width: Sizes.WIDTH_50,
+                  ),
+                ],
+              ),
+            ),
+          ],
+        ),
+        SpaceH20(),
+      ],
+    );
+  }
+
+  Widget _buildSeparator(BuildContext context) {
+    var textTheme = Theme.of(context).textTheme;
+    var widthOfScreen = MediaQuery.of(context).size.width;
+    return Container(
+      margin: const EdgeInsets.symmetric(horizontal: Sizes.MARGIN_16),
+      child: Row(
+        mainAxisAlignment: MainAxisAlignment.center,
+        children: <Widget>[
+          CustomDivider(
+            color: Colors.grey[300],
+            width: widthOfScreen * 0.15,
+            height: Sizes.HEIGHT_2,
+          ),
+          SpaceW16(),
+          Text(
+            StringConst.OR,
+            style: textTheme.subtitle1.copyWith(
+              color: AppColors.greyShade8,
+            ),
+          ),
+          SpaceW16(),
+          CustomDivider(
+            color: Colors.grey[300],
+            width: widthOfScreen * 0.15,
+            height: Sizes.HEIGHT_2,
+          ),
+        ],
+      ),
+    );
+  }
+}

lib/main.dart

@@ -1,113 +1,39 @@
+import 'package:days_left/login/LoginScreen.dart';
+import 'package:days_left/screens/OverviewScreen.dart';
+import 'package:days_left/services/DialogService.dart';
+import 'package:days_left/services/NavigationService.dart';
+import 'package:days_left/viewmodels/UserAuthViewModel.dart';
+import 'package:days_left/widgets/router.dart';
+import 'package:firebase_core/firebase_core.dart';
 import 'package:flutter/material.dart';
+import 'locator.dart';
+import 'managers/DialogManager.dart';
 
-void main() {
+void main() async {
+  WidgetsFlutterBinding.ensureInitialized();
+  await Firebase.initializeApp();
+  setupLocator();
   runApp(MyApp());
 }
 
 class MyApp extends StatelessWidget {
-  // This widget is the root of your application.
+  final UserAuthViewModel _userAuthViewModel = locator<UserAuthViewModel>();
+
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
       title: 'Flutter Demo',
       theme: ThemeData(
-        // This is the theme of your application.
-        //
-        // Try running your application with "flutter run". You'll see the
-        // application has a blue toolbar. Then, without quitting the app, try
-        // changing the primarySwatch below to Colors.green and then invoke
-        // "hot reload" (press "r" in the console where you ran "flutter run",
-        // or simply save your changes to "hot reload" in a Flutter IDE).
-        // Notice that the counter didn't reset back to zero; the application
-        // is not restarted.
         primarySwatch: Colors.blue,
       ),
-      home: MyHomePage(title: 'Flutter Demo Home Page'),
+      home: _userAuthViewModel.loggedIn ? OverviewScreen() : LoginScreen(),
+      onGenerateRoute: generateRoute,
+      builder: (context, child) => Navigator(
+        key: locator<DialogService>().dialogNavigationKey,
+        onGenerateRoute: (settings) => MaterialPageRoute(
+            builder: (context) => DialogManager(child: child)),
+      ),
+      navigatorKey: locator<NavigationService>().navigationKey,
     );
   }
-}
-
-class MyHomePage extends StatefulWidget {
-  MyHomePage({Key key, this.title}) : super(key: key);
-
-  // This widget is the home page of your application. It is stateful, meaning
-  // that it has a State object (defined below) that contains fields that affect
-  // how it looks.
-
-  // This class is the configuration for the state. It holds the values (in this
-  // case the title) provided by the parent (in this case the App widget) and
-  // used by the build method of the State. Fields in a Widget subclass are
-  // always marked "final".
-
-  final String title;
-
-  @override
-  _MyHomePageState createState() => _MyHomePageState();
-}
-
-class _MyHomePageState extends State<MyHomePage> {
-  int _counter = 0;
-
-  void _incrementCounter() {
-    setState(() {
-      // This call to setState tells the Flutter framework that something has
-      // changed in this State, which causes it to rerun the build method below
-      // so that the display can reflect the updated values. If we changed
-      // _counter without calling setState(), then the build method would not be
-      // called again, and so nothing would appear to happen.
-      _counter++;
-    });
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    // This method is rerun every time setState is called, for instance as done
-    // by the _incrementCounter method above.
-    //
-    // The Flutter framework has been optimized to make rerunning build methods
-    // fast, so that you can just rebuild anything that needs updating rather
-    // than having to individually change instances of widgets.
-    return Scaffold(
-      appBar: AppBar(
-        // Here we take the value from the MyHomePage object that was created by
-        // the App.build method, and use it to set our appbar title.
-        title: Text(widget.title),
-      ),
-      body: Center(
-        // Center is a layout widget. It takes a single child and positions it
-        // in the middle of the parent.
-        child: Column(
-          // Column is also a layout widget. It takes a list of children and
-          // arranges them vertically. By default, it sizes itself to fit its
-          // children horizontally, and tries to be as tall as its parent.
-          //
-          // Invoke "debug painting" (press "p" in the console, choose the
-          // "Toggle Debug Paint" action from the Flutter Inspector in Android
-          // Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
-          // to see the wireframe for each widget.
-          //
-          // Column has various properties to control how it sizes itself and
-          // how it positions its children. Here we use mainAxisAlignment to
-          // center the children vertically; the main axis here is the vertical
-          // axis because Columns are vertical (the cross axis would be
-          // horizontal).
-          mainAxisAlignment: MainAxisAlignment.center,
-          children: <Widget>[
-            Text(
-              'You have pushed the button this many times:',
-            ),
-            Text(
-              '$_counter',
-              style: Theme.of(context).textTheme.headline4,
-            ),
-          ],
-        ),
-      ),
-      floatingActionButton: FloatingActionButton(
-        onPressed: _incrementCounter,
-        tooltip: 'Increment',
-        child: Icon(Icons.add),
-      ), // This trailing comma makes auto-formatting nicer for build methods.
-    );
-  }
-}
+}

lib/managers/DialogManager.dart

@@ -0,0 +1,54 @@
+import 'package:flutter/material.dart';
+import 'package:days_left/services/DialogService.dart';
+
+import '../locator.dart';
+import '../model/DialogModels.dart';
+
+class DialogManager extends StatefulWidget {
+  final Widget child;
+  DialogManager({Key key, this.child}) : super(key: key);
+
+  _DialogManagerState createState() => _DialogManagerState();
+}
+
+class _DialogManagerState extends State<DialogManager> {
+  DialogService _dialogService = locator<DialogService>();
+
+  @override
+  void initState() {
+    super.initState();
+    _dialogService.registerDialogListener(_showDialog);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return widget.child;
+  }
+
+  void _showDialog(DialogRequest request) {
+    var isConfirmationDialog = request.cancelTitle != null;
+    showDialog(
+        context: context,
+        builder: (context) => AlertDialog(
+          title: Text(request.title),
+          content: Text(request.description),
+          actions: <Widget>[
+            if (isConfirmationDialog)
+              FlatButton(
+                child: Text(request.cancelTitle),
+                onPressed: () {
+                  _dialogService
+                      .dialogComplete(DialogResponse(confirmed: false));
+                },
+              ),
+            FlatButton(
+              child: Text(request.buttonTitle),
+              onPressed: () {
+                _dialogService
+                    .dialogComplete(DialogResponse(confirmed: true));
+              },
+            ),
+          ],
+        ));
+  }
+}

lib/model/DialogModels.dart

@@ -0,0 +1,26 @@
+import 'package:flutter/foundation.dart';
+
+class DialogRequest{
+  final String title;
+  final String description;
+  final String buttonTitle;
+  final String cancelTitle;
+
+  DialogRequest(
+      {@required this.title,
+        @required this.description,
+        @required this.buttonTitle,
+        this.cancelTitle});
+}
+
+class DialogResponse {
+  final String fieldOne;
+  final String fieldTwo;
+  final bool confirmed;
+
+  DialogResponse({
+    this.fieldOne,
+    this.fieldTwo,
+    this.confirmed,
+  });
+}

lib/model/UserProfileDetails.dart

@@ -0,0 +1,26 @@
+
+class UserProfileDetails {
+  final String name;
+  final String dob;
+  final String postcode;
+  final String email;
+  final String phone;
+  final String sex;
+
+  UserProfileDetails(
+      this.name,
+      this.dob,
+      this.postcode,
+      this.email,
+      this.phone,
+      this.sex
+      );
+
+  UserProfileDetails.fromSnapshot(Map<dynamic, dynamic> snapshot) :
+        name = snapshot["name"],
+        dob = snapshot["dob"],
+        postcode = snapshot["postcode"],
+        email = snapshot["email"],
+        phone = snapshot["phone"],
+        sex = snapshot["sex"];
+}

lib/screens/OverviewScreen.dart

@@ -0,0 +1,8 @@
+import 'package:flutter/cupertino.dart';
+
+class OverviewScreen extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return Container();
+  }
+}

lib/services/DialogService.dart

@@ -0,0 +1,54 @@
+import 'dart:async';
+
+import 'package:flutter/cupertino.dart';
+import 'package:days_left/model/DialogModels.dart';
+
+class DialogService {
+  GlobalKey<NavigatorState> _dialogNavigationKey = GlobalKey<NavigatorState>();
+  Function(DialogRequest) _showDialogListener;
+  Completer<DialogResponse> _dialogCompleter;
+
+  GlobalKey<NavigatorState> get dialogNavigationKey => _dialogNavigationKey;
+
+  /// Registers a callback function. Typically to show the dialog
+  void registerDialogListener(Function(DialogRequest) showDialogListener) {
+    _showDialogListener = showDialogListener;
+  }
+
+  /// Calls the dialog listener and returns a Future that will wait for dialogComplete.
+  Future<DialogResponse> showDialog({
+    String title,
+    String description,
+    String buttonTitle = 'Ok',
+  }) {
+    _dialogCompleter = Completer<DialogResponse>();
+    _showDialogListener(DialogRequest(
+      title: title,
+      description: description,
+      buttonTitle: buttonTitle,
+    ));
+    return _dialogCompleter.future;
+  }
+
+  /// Shows a confirmation dialog
+  Future<DialogResponse> showConfirmationDialog(
+      {String title,
+        String description,
+        String confirmationTitle = 'Ok',
+        String cancelTitle = 'Cancel'}) {
+    _dialogCompleter = Completer<DialogResponse>();
+    _showDialogListener(DialogRequest(
+        title: title,
+        description: description,
+        buttonTitle: confirmationTitle,
+        cancelTitle: cancelTitle));
+    return _dialogCompleter.future;
+  }
+
+  /// Completes the _dialogCompleter to resume the Future's execution call
+  void dialogComplete(DialogResponse response) {
+    _dialogNavigationKey.currentState.pop();
+    _dialogCompleter.complete(response);
+    _dialogCompleter = null;
+  }
+}

lib/services/NavigationService.dart

@@ -0,0 +1,21 @@
+import 'package:flutter/material.dart';
+
+class NavigationService {
+  GlobalKey<NavigatorState> _navigationKey = GlobalKey<NavigatorState>();
+
+  GlobalKey<NavigatorState> get navigationKey => _navigationKey;
+
+  void pop() {
+    return _navigationKey.currentState.pop();
+  }
+
+  Future<dynamic> navigateTo(String routeName, {dynamic arguments}) {
+    return _navigationKey.currentState
+        .pushNamed(routeName, arguments: arguments);
+  }
+
+  Future<dynamic> navigateToAndClearStack(String routeName, {dynamic arguments}) {
+    return _navigationKey.currentState
+        .pushNamedAndRemoveUntil(routeName, (r) => false, arguments: arguments);
+  }
+}

lib/viewmodels/LoginViewModel.dart

@@ -0,0 +1,14 @@
+import 'package:days_left/data/FirebaseAuthData.dart';
+import '../base/BaseModel.dart';
+
+class LoginViewModel extends BaseModel {
+  FirebaseAuthData _firebaseAuthData;
+  LoginViewModel(this._firebaseAuthData);
+
+  void tryLogin(String email, String password) {
+    // Todo: validate username & password
+    handleFuture(_firebaseAuthData.signIn(email, password));
+  }
+
+
+}

lib/viewmodels/UserAuthViewModel.dart

@@ -0,0 +1,16 @@
+import 'package:days_left/data/FirebaseAuthData.dart';
+import '../base/BaseModel.dart';
+
+class UserAuthViewModel extends BaseModel {
+  bool _loggedIn = false;
+  bool get loggedIn => _loggedIn;
+
+  FirebaseAuthData _firebaseAuthData;
+  UserAuthViewModel(this._firebaseAuthData){
+    _firebaseAuthData.firebaseAuth.authStateChanges().listen((event) {
+      _loggedIn = event != null;
+      notifyListeners();
+    });
+  }
+
+}

lib/widgets/ButtonWidget.dart

@@ -0,0 +1,23 @@
+
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+
+class ButtonWidget extends StatelessWidget{
+  final String label;
+  final Function onPressed;
+
+  ButtonWidget(this.label, {this.onPressed});
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      margin: EdgeInsets.only(top: 20, bottom: 12),
+      child: ElevatedButton(
+        onPressed: onPressed,
+        child: Text(label),
+      ),
+    );
+  }
+
+
+}

lib/widgets/CodeEnterWidget.dart

@@ -0,0 +1,74 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:flutter/widgets.dart';
+
+class CodeEnterWidget extends StatelessWidget {
+  final _formKey = GlobalKey<FormState>();
+  final GlobalKey<ScaffoldState> scaffoldPageOne;
+
+  CodeEnterWidget({this.scaffoldPageOne});
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      body: Center(
+          child: Form(
+              key: _formKey,
+              child: Container(
+                decoration: BoxDecoration(
+                  color: Colors.white,
+                  boxShadow: [
+                    BoxShadow(
+                      color: Colors.grey.withOpacity(0.5),
+                      spreadRadius: 5,
+                      blurRadius: 7,
+                      offset: Offset(0, 3), // changes position of shadow
+                    ),
+                  ],
+                ),
+                margin: EdgeInsets.all(20.0),
+                padding: EdgeInsets.all(12.0),
+                child: Column(
+                  mainAxisAlignment: MainAxisAlignment.center,
+                  mainAxisSize: MainAxisSize.min,
+                  children: <Widget>[
+                    Container(
+                      child: Text(
+                        "Sign in with your phone number below.",
+                        style: TextStyle(color: Colors.white),
+                      ),
+                      color: Colors.blue,
+                      alignment: Alignment.center,
+                      padding: EdgeInsets.all(20.0),
+                    ),
+                    TextFormField(
+                      keyboardType: TextInputType.phone,
+                      validator: (value) {
+                        if (value.isEmpty) {
+                          return 'Enter the code sent to you';
+                        }
+                        return null;
+                      },
+                    ),
+                    Container(
+                      margin: EdgeInsets.only(top: 20, bottom: 12),
+                      child: ElevatedButton(
+                        onPressed: () {
+                          if (_formKey.currentState.validate()) {
+                            scaffoldPageOne.currentState.showSnackBar(
+                                SnackBar(content: Text('Processing Data')));
+                          }
+                          Timer(Duration(seconds: 2), () {
+                            // Todo: change body
+                          });
+                        },
+                        child: Text('Submit'),
+                      ),
+                    ),
+                  ],
+                ),
+              ))),
+    );
+  }
+}

lib/widgets/DisplayUserDetails.dart

@@ -0,0 +1,85 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/widgets.dart';
+import 'package:days_left/constants/constants.dart';
+import 'package:days_left/model/UserProfileDetails.dart';
+import 'package:days_left/services/NavigationService.dart';
+
+import '../locator.dart';
+import 'TextDetailWidget.dart';
+
+class DisplayUserDetails extends StatelessWidget {
+  final _formKey = GlobalKey<FormState>();
+  final NavigationService _navigationService = locator<NavigationService>();
+
+  final UserProfileDetails userDetails;
+  final Function callback;
+
+  DisplayUserDetails(this.userDetails, this.callback);
+
+  @override
+  Widget build(BuildContext context) {
+    return Center(
+      child: Form(
+          key: _formKey,
+          child: Container(
+            width: 400,
+            decoration: BoxDecoration(
+              color: Colors.white,
+              boxShadow: [
+                BoxShadow(
+                  color: Colors.grey.withOpacity(0.5),
+                  spreadRadius: 5,
+                  blurRadius: 7,
+                  offset: Offset(0, 3), // changes position of shadow
+                ),
+              ],
+            ),
+            margin: EdgeInsets.all(20.0),
+            padding: EdgeInsets.all(12.0),
+            child: getInnerWidget(context),
+          )),
+    );
+  }
+
+  Widget getInnerWidget(BuildContext context) {
+    return Column(
+      mainAxisAlignment: MainAxisAlignment.center,
+      mainAxisSize: MainAxisSize.min,
+      children: <Widget>[
+        Container(
+          child: Text(
+            "User Profile",
+            style: TextStyle(color: Colors.white),
+          ),
+          color: Colors.blue,
+          alignment: Alignment.center,
+          padding: EdgeInsets.all(20.0),
+        ),
+        _getInnerWidgetList(),
+        Container(
+          margin: EdgeInsets.only(top: 20, bottom: 12),
+          child: ElevatedButton(
+            onPressed: () {
+              _navigationService.navigateTo(UpdateDetailsViewRoute,
+                  arguments: userDetails);
+            },
+            child: Text('Update'),
+          ),
+        )
+      ],
+    );
+  }
+
+  Widget _getInnerWidgetList() {
+    return Column(
+        mainAxisAlignment: MainAxisAlignment.center,
+        mainAxisSize: MainAxisSize.min,
+        children: <Widget>[
+          TextDetailWidget("Name", userDetails?.name ?? "n/a"),
+          TextDetailWidget("D.O.B", userDetails?.dob ?? "n/a"),
+          TextDetailWidget("Email", userDetails?.email ?? "n/a"),
+          TextDetailWidget("Phone no.", userDetails?.phone ?? "n/a"),
+          TextDetailWidget("Sex", userDetails?.sex ?? "n/a"),
+        ]);
+  }
+}

lib/widgets/LoaderWidget.dart

@@ -0,0 +1,61 @@
+
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+
+class LoaderWidget extends StatefulWidget {
+
+  final Widget body;
+  LoaderWidget({this.body, Key key}): super(key: key);
+
+  @override
+  LoaderWidgetState createState() => LoaderWidgetState();
+}
+
+class LoaderWidgetState extends State<LoaderWidget> {
+  bool _status = false;
+
+  @override
+  void initState() {
+    super.initState();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Center(
+      child: _status ? Center(child: CircularProgressIndicator())
+          : Center(
+        child: widget.body,
+      ),
+    );
+  }
+
+  void changeState(){
+    setState(() {
+      _status = !_status;
+    });
+  }
+}
+
+abstract class LoaderStatelessWidget extends StatelessWidget{
+  final loaderKey = GlobalKey<LoaderWidgetState>();
+
+  void changeState(){
+    loaderKey.currentState.changeState();
+  }
+
+  Widget LoaderWidgeted({Widget body}){
+    return LoaderWidget(body: body, key: loaderKey);
+  }
+}
+
+abstract class LoaderStatefulWidget<T extends StatefulWidget> extends State<T>{
+  final loaderKey = GlobalKey<LoaderWidgetState>();
+
+  void changeState(){
+    loaderKey.currentState.changeState();
+  }
+
+  Widget LoaderWidgeted(Widget body, Key key){
+    return LoaderWidget(body: body, key: key);
+  }
+}

lib/widgets/TextDetailWidget.dart

@@ -0,0 +1,26 @@
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+
+class TextDetailWidget extends StatelessWidget {
+  final String labelText;
+  final String bodyText;
+
+  TextDetailWidget(this.labelText, this.bodyText);
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+        mainAxisAlignment: MainAxisAlignment.center,
+        mainAxisSize: MainAxisSize.min,
+        children: <Widget>[
+          Text(
+            labelText,
+            style: TextStyle(color: Colors.blue),
+          ),
+          Text(
+            bodyText,
+            style: TextStyle(color: Colors.black),
+          )
+        ]);
+  }
+}

lib/widgets/router.dart

@@ -0,0 +1,28 @@
+import 'package:days_left/login/login_screen_6.dart';
+import 'package:flutter/material.dart';
+import '../constants/constants.dart';
+
+
+Route<dynamic> generateRoute(RouteSettings settings) {
+  switch (settings.name) {
+    case LoginViewRoute:
+      return _getPageRoute(
+        routeName: settings.name,
+        viewToShow: LoginScreen6(),
+      );
+    default:
+      return MaterialPageRoute(
+          builder: (_) => Scaffold(
+            body: Center(
+                child: Text('No route defined for ${settings.name}')),
+          ));
+  }
+}
+
+PageRoute _getPageRoute({String routeName, Widget viewToShow}) {
+  return MaterialPageRoute(
+      settings: RouteSettings(
+        name: routeName,
+      ),
+      builder: (_) => viewToShow);
+}