increase brightness for gift card detail page (#478)

* increase brightness for gift card detail page

* move logic to view model

* fix format

lib/src/screens/ionia/cards/ionia_gift_card_detail_page.dart

@@ -13,6 +13,7 @@ import 'package:cake_wallet/typography.dart';
 import 'package:cake_wallet/utils/show_bar.dart';
 import 'package:cake_wallet/utils/show_pop_up.dart';
 import 'package:cake_wallet/view_model/ionia/ionia_gift_card_details_view_model.dart';
+import 'package:device_display_brightness/device_display_brightness.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter/src/widgets/framework.dart';
@@ -25,6 +26,8 @@ class IoniaGiftCardDetailPage extends BasePage {
 
   final IoniaGiftCardDetailsViewModel viewModel;
 
+
+
   @override
   Widget leading(BuildContext context) {
     if (ModalRoute.of(context).isFirst) {
@@ -47,7 +50,10 @@ class IoniaGiftCardDetailPage extends BasePage {
               highlightColor: Colors.transparent,
               splashColor: Colors.transparent,
               padding: EdgeInsets.all(0),
-              onPressed: () => onClose(context),
+              onPressed: () {
+                onClose(context);
+                DeviceDisplayBrightness.setBrightness(viewModel.brightness);
+              },
               child: _backButton),
         ),
       ),
@@ -64,6 +70,7 @@ class IoniaGiftCardDetailPage extends BasePage {
 
   @override
   Widget body(BuildContext context) {
+    viewModel.increaseBrightness();
     reaction((_) => viewModel.redeemState, (ExecutionState state) {
       if (state is FailureState) {
         WidgetsBinding.instance.addPostFrameCallback((_) {

lib/view_model/ionia/ionia_gift_card_details_view_model.dart

@@ -2,6 +2,7 @@ import 'package:cake_wallet/core/execution_state.dart';
 import 'package:cake_wallet/ionia/ionia_service.dart';
 import 'package:cake_wallet/ionia/ionia_gift_card.dart';
 import 'package:mobx/mobx.dart';
+import 'package:device_display_brightness/device_display_brightness.dart';
 
 part 'ionia_gift_card_details_view_model.g.dart';
 
@@ -14,6 +15,7 @@ abstract class IoniaGiftCardDetailsViewModelBase with Store {
   }
 
   final IoniaService ioniaService;
+  double brightness;
   
   @observable
   IoniaGiftCard giftCard;
@@ -32,4 +34,9 @@ abstract class IoniaGiftCardDetailsViewModelBase with Store {
       redeemState = FailureState(e.toString());
     }
   }
+
+  void increaseBrightness() async {
+    brightness = await DeviceDisplayBrightness.getBrightness();
+    await DeviceDisplayBrightness.setBrightness(1.0);
+  }
 }