Added 'AddBalanceViewModel'

Added form validations

lib/di.dart

@@ -8,6 +8,7 @@ import 'package:cake_wallet/bitcoin/bitcoin.dart';
 import 'package:cake_wallet/src/screens/cake_phone/phone_number_service/auto_renew_settings_page.dart';
 import 'package:cake_wallet/src/screens/cake_phone/phone_number_service/number_settings_page.dart';
 import 'package:cake_wallet/src/screens/dashboard/widgets/balance_page.dart';
+import 'package:cake_wallet/view_model/cake_phone/add_balance_view_model.dart';
 import 'package:cake_wallet/view_model/cake_phone/phone_plan_view_model.dart';
 import 'package:cw_core/unspent_coins_info.dart';
 import 'package:cake_wallet/core/backup_service.dart';
@@ -662,7 +663,13 @@ Future setup(
     ));
 
   getIt.registerFactory(() {
-    return AddBalancePage(/* Add balance view model */);
+    final wallet = getIt.get<AppStore>().wallet;
+
+    return AddBalanceViewModel(getIt.get<BuyAmountViewModel>(), wallet: wallet);
+  });
+
+  getIt.registerFactory(() {
+    return AddBalancePage(addBalanceViewModel: getIt.get<AddBalanceViewModel>());
   });
 
   _isSetupFinished = true;

lib/src/screens/cake_phone/add_balance_page.dart

@@ -4,18 +4,26 @@ import 'package:cake_wallet/src/widgets/keyboard_done_button.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
+import 'package:flutter_mobx/flutter_mobx.dart';
 import 'package:keyboard_actions/keyboard_actions.dart';
 import 'package:cake_wallet/src/screens/base_page.dart';
 import 'package:cake_wallet/src/widgets/primary_button.dart';
 import 'package:cake_wallet/src/widgets/scollable_with_bottom_section.dart';
 import 'package:cake_wallet/generated/i18n.dart';
 import 'package:cake_wallet/src/widgets/base_text_form_field.dart';
+import 'package:cake_wallet/view_model/cake_phone/add_balance_view_model.dart';
 
 class AddBalancePage extends BasePage {
-  AddBalancePage()
+  AddBalancePage({@required this.addBalanceViewModel})
       : _amountFocus = FocusNode(),
         _amountController = TextEditingController() {
-    _amountController.addListener(() {});
+    _amountController.addListener(() {
+      final amount = _amountController.text;
+
+      if (amount != addBalanceViewModel.buyAmountViewModel.amount) {
+        addBalanceViewModel.buyAmountViewModel.amount = amount;
+      }
+    });
   }
 
   static const _amountPattern = '^([0-9]+([.\,][0-9]{0,2})?|[.\,][0-9]{1,2})\$';
@@ -25,6 +33,7 @@ class AddBalancePage extends BasePage {
     "500 additional SMS",
   ];
 
+  final AddBalanceViewModel addBalanceViewModel;
   final FocusNode _amountFocus;
   final TextEditingController _amountController;
 
@@ -151,13 +160,19 @@ class AddBalancePage extends BasePage {
             ],
           ),
           bottomSectionPadding: EdgeInsets.only(left: 24, right: 24, bottom: 24),
-          bottomSection: LoadingPrimaryButton(
-            onPressed: () {},
+          bottomSection: Observer(
+            builder: (_) {
+              return LoadingPrimaryButton(
+                onPressed: () {
+
+                },
                 text: S.of(context).buy,
                 color: Theme.of(context).accentTextTheme.body2.color,
                 textColor: Colors.white,
                 isLoading: false,
-            isDisabled: _amountController.text.isEmpty,
+                isDisabled: addBalanceViewModel.buyAmountViewModel.amount.isEmpty,
+              );
+            }
           ),
         ),
       ),

lib/src/screens/cake_phone/cake_phone_auth_page.dart

@@ -39,6 +39,9 @@ class CakePhoneAuthBody extends StatefulWidget {
 
 class CakePhoneAuthBodyState extends State<CakePhoneAuthBody> {
   final _emailController = TextEditingController();
+  final _formKey = GlobalKey<FormState>();
+
+  AutovalidateMode _autoValidate = AutovalidateMode.disabled;
 
   @override
   Widget build(BuildContext context) {
@@ -46,11 +49,23 @@ class CakePhoneAuthBodyState extends State<CakePhoneAuthBody> {
       padding: EdgeInsets.only(top: 16),
       child: ScrollableWithBottomSection(
         contentPadding: EdgeInsets.fromLTRB(24, 100, 24, 20),
-        content: BaseTextFormField(
+        content: Form(
+          key: _formKey,
+          autovalidateMode: _autoValidate,
+          child: BaseTextFormField(
             controller: _emailController,
             keyboardType: TextInputType.emailAddress,
             maxLines: 1,
             hintText: S.of(context).email_address,
+            validator: (String text) {
+              text = text.trim();
+              if (text.isNotEmpty && RegExp(r"^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$").hasMatch(text)) {
+                return null;
+              }
+
+              return S.of(context).invalid_email;
+            },
+          ),
         ),
         bottomSectionPadding: EdgeInsets.only(bottom: 24, right: 24, left: 24),
         bottomSection: Column(
@@ -114,11 +129,23 @@ class CakePhoneAuthBodyState extends State<CakePhoneAuthBody> {
 
   void _registerCakePhone() {
     // TODO: Add Registration logic
+    if (_formKey.currentState.validate()) {
       Navigator.pushNamed(context, Routes.cakePhoneVerification);
+    } else {
+      setState(() {
+        _autoValidate = AutovalidateMode.always;
+      });
+    }
   }
 
   void _loginCakePhone() {
     // TODO: Add Login logic
+    if (_formKey.currentState.validate()) {
       Navigator.pushNamed(context, Routes.cakePhoneVerification);
+    } else {
+      setState(() {
+        _autoValidate = AutovalidateMode.always;
+      });
+    }
   }
 }

lib/src/screens/cake_phone/cake_phone_verification_page.dart

@@ -37,15 +37,30 @@ class CakePhoneVerificationBody extends StatefulWidget {
 
 class CakePhoneVerificationBodyState extends State<CakePhoneVerificationBody> {
   final _codeController = TextEditingController();
+  final _formKey = GlobalKey<FormState>();
+
+  AutovalidateMode _autoValidate = AutovalidateMode.disabled;
 
   int resendCount = 0;
   int timeLeft = 0;
 
+  bool disabled = true;
+
   @override
   void initState() {
     super.initState();
 
     _startTimer();
+
+    _codeController.addListener(() {
+      if (_codeController.text.isEmpty) {
+        disabled = true;
+        setState(() {});
+      } else if (disabled) {
+        disabled = false;
+        setState(() {});
+      }
+    });
   }
 
   @override
@@ -70,6 +85,9 @@ class CakePhoneVerificationBodyState extends State<CakePhoneVerificationBody> {
             ),
             Padding(
               padding: const EdgeInsets.symmetric(vertical: 25),
+              child: Form(
+                key: _formKey,
+                autovalidateMode: _autoValidate,
                 child: BaseTextFormField(
                   controller: _codeController,
                   maxLines: 1,
@@ -93,6 +111,14 @@ class CakePhoneVerificationBodyState extends State<CakePhoneVerificationBody> {
                                 ),
                               )),
                         ),
+                  validator: (String text) {
+                    // TODO: check and apply verification constraints with backend
+                    if (text.length < 4) {
+                      return S.of(context).invalid_verification_code;
+                    }
+                    return null;
+                  },
+                ),
               ),
             ),
             if (timeLeft > 0)
@@ -123,16 +149,22 @@ class CakePhoneVerificationBodyState extends State<CakePhoneVerificationBody> {
           children: <Widget>[
             PrimaryButton(
               onPressed: () {
+                if (_formKey.currentState.validate()) {
                   Navigator.pushNamedAndRemoveUntil(
                     context,
                     Routes.cakePhoneProducts,
                     ModalRoute.withName(Routes.cakePhoneWelcome),
                   );
+                } else {
+                  setState(() {
+                    _autoValidate = AutovalidateMode.always;
+                  });
+                }
               },
               text: S.of(context).continue_text,
               color: Theme.of(context).accentTextTheme.body2.color,
               textColor: Colors.white,
-              isDisabled: _codeController.text.isEmpty,
+              isDisabled: disabled,
             ),
           ],
         ),

lib/view_model/cake_phone/add_balance_view_model.dart

@@ -0,0 +1,36 @@
+import 'package:cake_wallet/view_model/buy/buy_amount_view_model.dart';
+import 'package:cw_core/crypto_currency.dart';
+import 'package:cake_wallet/entities/fiat_currency.dart';
+import 'package:cw_core/wallet_type.dart';
+import 'package:flutter/foundation.dart';
+import 'package:mobx/mobx.dart';
+import 'package:cw_core/wallet_base.dart';
+
+part 'add_balance_view_model.g.dart';
+
+class AddBalanceViewModel = AddBalanceViewModelBase with _$AddBalanceViewModel;
+
+abstract class AddBalanceViewModelBase with Store {
+  AddBalanceViewModelBase(this.buyAmountViewModel, {@required this.wallet}) {
+    isRunning = false;
+    isDisabled = true;
+  }
+
+  final BuyAmountViewModel buyAmountViewModel;
+  final WalletBase wallet;
+
+  @observable
+  bool isRunning;
+
+  @observable
+  bool isDisabled;
+
+  WalletType get type => wallet.type;
+
+  double get doubleAmount => buyAmountViewModel.doubleAmount;
+
+  @computed
+  FiatCurrency get fiatCurrency => buyAmountViewModel.fiatCurrency;
+
+  CryptoCurrency get cryptoCurrency => walletTypeToCryptoCurrency(type);
+}

res/values/strings_en.arb

@@ -594,5 +594,7 @@
   "transaction_sent_popup_info": "Your transaction was sent. \n\nIf the screen doesn’t proceed after 1 minute, check a block explorer and your email.",
   "cake_phone_products_example": "Example independent uses",
   "add_balance": "Add Balance",
-  "forwards": "forwards"
+  "forwards": "forwards",
+  "invalid_email": "Invalid Email",
+  "invalid_verification_code": "Invalid verification code"
 }