load exchange data everytime on button or swipe to exchange screen

lib/pages/home_view/home_view.dart

@@ -16,15 +16,13 @@ import 'package:stackwallet/providers/ui/unread_notifications_provider.dart';
 import 'package:stackwallet/services/exchange/exchange_data_loading_service.dart';
 import 'package:stackwallet/utilities/assets.dart';
 import 'package:stackwallet/utilities/constants.dart';
+import 'package:stackwallet/utilities/logger.dart';
+import 'package:stackwallet/utilities/prefs.dart';
 import 'package:stackwallet/utilities/text_styles.dart';
 import 'package:stackwallet/utilities/theme/stack_colors.dart';
 import 'package:stackwallet/widgets/custom_buttons/app_bar_icon_button.dart';
 import 'package:stackwallet/widgets/stack_dialog.dart';
 
-import 'package:stackwallet/utilities/logger.dart';
-
-import 'package:stackwallet/utilities/prefs.dart';
-
 class HomeView extends ConsumerStatefulWidget {
   const HomeView({Key? key}) : super(key: key);
 
@@ -45,7 +43,7 @@ class _HomeViewState extends ConsumerState<HomeView> {
 
   bool _exitEnabled = false;
 
-  final _cnLoadingService = ExchangeDataLoadingService();
+  final _exchangeDataLoadingService = ExchangeDataLoadingService();
 
   Future<bool> _onWillPop() async {
     // go to home view when tapping back on the main exchange view
@@ -88,7 +86,7 @@ class _HomeViewState extends ConsumerState<HomeView> {
     //
     final externalCalls = Prefs.instance.externalCalls;
     if (externalCalls) {
-      _cnLoadingService.loadAll(ref);
+      _exchangeDataLoadingService.loadAll(ref);
     } else {
       Logging.instance.log("User does not want to use external calls",
           level: LogLevel.Info);
@@ -290,6 +288,9 @@ class _HomeViewState extends ConsumerState<HomeView> {
                     _ref.listen(homeViewPageIndexStateProvider,
                         (previous, next) {
                       if (next is int) {
+                        if (next == 1) {
+                          _loadCNData();
+                        }
                         if (next >= 0 && next <= 1) {
                           _pageController.animateToPage(
                             next,

lib/pages/home_view/sub_widgets/home_view_button_bar.dart

@@ -1,5 +1,3 @@
-import 'dart:async';
-
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:stackwallet/providers/providers.dart';
@@ -8,8 +6,6 @@ import 'package:stackwallet/utilities/text_styles.dart';
 import 'package:stackwallet/utilities/theme/stack_colors.dart';
 import 'package:stackwallet/widgets/stack_dialog.dart';
 
-import 'package:stackwallet/utilities/prefs.dart';
-
 class HomeViewButtonBar extends ConsumerStatefulWidget {
   const HomeViewButtonBar({Key? key}) : super(key: key);
 
@@ -18,8 +14,8 @@ class HomeViewButtonBar extends ConsumerStatefulWidget {
 }
 
 class _HomeViewButtonBarState extends ConsumerState<HomeViewButtonBar> {
-  final DateTime _lastRefreshed = DateTime.now();
+  // final DateTime _lastRefreshed = DateTime.now();
-  final Duration _refreshInterval = const Duration(hours: 1);
+  // final Duration _refreshInterval = const Duration(hours: 1);
 
   @override
   void initState() {
@@ -104,34 +100,14 @@ class _HomeViewButtonBarState extends ConsumerState<HomeViewButtonBar> {
               if (selectedIndex != 1) {
                 ref.read(homeViewPageIndexStateProvider.state).state = 1;
               }
-              DateTime now = DateTime.now();
+              // DateTime now = DateTime.now();
-              final _cnLoadingService = ExchangeDataLoadingService();
+              if (ref.read(prefsChangeNotifierProvider).externalCalls) {
-              final externalCalls = Prefs.instance.externalCalls;
-              if (!externalCalls) {
                 print("loading?");
-                unawaited(_cnLoadingService.loadAll(ref));
-              }
-              if (now.difference(_lastRefreshed) > _refreshInterval) {
-                // bool okPressed = false;
-                // showDialog<dynamic>(
-                //   context: context,
-                //   barrierDismissible: false,
-                //   builder: (_) => const StackDialog(
-                //     // builder: (_) => StackOkDialog(
-                //     title: "Refreshing ChangeNOW data",
-                //     message: "This may take a while",
-                //     // onOkPressed: (value) {
-                //     //   if (value == "OK") {
-                //     //     okPressed = true;
-                //     //   }
-                //     // },
-                //   ),
-                // );
                 await ExchangeDataLoadingService().loadAll(ref);
-                // if (!okPressed && mounted) {
-                //   Navigator.of(context).pop();
-                // }
               }
+              // if (now.difference(_lastRefreshed) > _refreshInterval) {
+              //   await ExchangeDataLoadingService().loadAll(ref);
+              // }
             },
             child: Text(
               "Exchange",

lib/utilities/prefs.dart

@@ -546,6 +546,8 @@ class Prefs extends ChangeNotifier {
         boxName: DB.boxNamePrefs, key: "startupWalletId") as String?;
   }
 
+  // incognito mode off by default
+  // allow external network calls such as exchange data and price info
   bool _externalCalls = true;
 
   bool get externalCalls => _externalCalls;