feat: better and centralized loading screen

android/build/reports/problems/problems-report.html

@@ -650,7 +650,7 @@ code + .copy-button {
 <script type="text/javascript">
 function configurationCacheProblems() { return (
 // begin-report-data
-{"diagnostics":[{"locations":[{}],"problem":[{"text":"Configuring project ':' without an existing directory is deprecated. The configured projectDirectory '/usr/lib/flutter/packages/flutter_tools/gradle' does not exist, can't be written to or is not a directory. This behavior has been deprecated."}],"severity":"WARNING","problemDetails":[{"text":"This will fail with an error in Gradle 9.0."}],"contextualLabel":"Configuring project ':' without an existing directory is deprecated. The configured projectDirectory '/usr/lib/flutter/packages/flutter_tools/gradle' does not exist, can't be written to or is not a directory. This behavior has been deprecated.","documentationLink":"https://docs.gradle.org/8.14.3/userguide/upgrading_version_8.html#deprecated_missing_project_directory","problemId":[{"name":"deprecation","displayName":"Deprecation"},{"name":"configuring-project-without-an-existing-directory-is-deprecated-the-configured-projectdirectory-usr-lib-flutter-packages-flutter-tools-gradle-does-not-exist-can-t-be-written-to-or-is-not-a-directory-this-behavior-has-been-deprecated","displayName":"Configuring project ':' without an existing directory is deprecated. The configured projectDirectory '/usr/lib/flutter/packages/flutter_tools/gradle' does not exist, can't be written to or is not a directory. This behavior has been deprecated."}],"solutions":[[{"text":"Make sure the project directory exists and can be written."}]]}],"problemsReport":{"totalProblemCount":1,"requestedTasks":"assembleDebug","documentationLink":"https://docs.gradle.org/8.14.3/userguide/reporting_problems.html","documentationLinkCaption":"Problem report","summaries":[]}}
+{"diagnostics":[{"locations":[{},{"pluginId":"dev.flutter.flutter-gradle-plugin"}],"problem":[{"text":"The CopyProcessingSpec.setFileMode(Integer) method has been deprecated."}],"severity":"WARNING","problemDetails":[{"text":"This is scheduled to be removed in Gradle 9.0."}],"contextualLabel":"The CopyProcessingSpec.setFileMode(Integer) method has been deprecated.","documentationLink":"https://docs.gradle.org/8.14.3/userguide/upgrading_version_8.html#unix_file_permissions_deprecated","problemId":[{"name":"deprecation","displayName":"Deprecation"},{"name":"the-copyprocessingspec-setfilemode-integer-method-has-been-deprecated","displayName":"The CopyProcessingSpec.setFileMode(Integer) method has been deprecated."}],"solutions":[[{"text":"Please use the filePermissions(Action) method instead."}]]}],"problemsReport":{"totalProblemCount":1,"buildName":"android","requestedTasks":"assembleDebug","documentationLink":"https://docs.gradle.org/8.14.3/userguide/reporting_problems.html","documentationLinkCaption":"Problem report","summaries":[]}}
 // end-report-data
 );}
 </script>

lib/ui/add_page/view_model/add_view_model.dart

@@ -139,7 +139,13 @@ class AddViewModel extends ChangeNotifier {
         break;
     }
     final result2 = await _loadBal();
-    isLoaded = true;
+    switch (result2) {
+      case Ok():
+        isLoaded = true;
+        break;
+      default:
+        break;
+    }
     notifyListeners();
     return result2;
   }

lib/ui/add_page/widgets/add_page.dart

@@ -9,6 +9,7 @@ import 'package:seshat/ui/add_page/widgets/form_popup.dart';
 import 'package:seshat/ui/add_page/widgets/owner_popup.dart';
 import 'package:seshat/ui/add_page/widgets/confirmation_popup.dart';
 import 'package:seshat/ui/core/ui/navigation_bar.dart';
+import 'package:seshat/ui/core/ui/await_loading.dart';
 import 'package:seshat/utils/result.dart';
 
 class AddPage extends StatefulWidget {
@@ -37,7 +38,7 @@ class _AddPageState extends State<AddPage> {
       body: ListenableBuilder(
         listenable: widget.viewModel,
         builder: (context, child) => switch (widget.viewModel.isLoaded) {
-          false => Center(child: CircularProgressIndicator()),
+          false => AwaitLoading(),
           true => switch (widget.viewModel.currentBal) {
             null => Center(
               child: SizedBox(

lib/ui/bal_page/view_model/bal_view_model.dart

@@ -28,12 +28,12 @@ class BalViewModel extends ChangeNotifier {
   Future<Result<void>> _load() async {
     final result1 = await _loadBal();
     switch (result1) {
-      case Error():
-        return result1;
+      case Ok():
+        isLoaded = true;
+        break;
       default:
         break;
     }
-    isLoaded = true;
     notifyListeners();
     return result1;
   }

lib/ui/bal_page/widget/bal_page.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:seshat/domain/models/bal.dart';
 import 'package:seshat/ui/bal_page/view_model/bal_view_model.dart';
 import 'package:seshat/ui/core/ui/navigation_bar.dart';
+import 'package:seshat/ui/core/ui/await_loading.dart';
 
 class BalPage extends StatefulWidget {
   const BalPage({super.key, required this.viewModel});
@@ -21,7 +22,7 @@ class _BalPageState extends State<BalPage> {
         listenable: widget.viewModel,
         builder: (context, child) {
           return switch (widget.viewModel.isLoaded) {
-            false => Center(child: CircularProgressIndicator()),
+            false => AwaitLoading(),
             true => switch (widget.viewModel.bal == null) {
               true => Center(
                 child: Text("La BAL référencée n'est pas accessible"),

lib/ui/bal_page/widget/pending/bal_pending_screen.dart

@@ -0,0 +1,11 @@
+import 'package:flutter/material.dart';
+
+class BalPendingScreen extends StatelessWidget {
+  const BalPendingScreen({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    // TODO: implement build
+    throw UnimplementedError();
+  }
+}

lib/ui/core/ui/await_loading.dart

@@ -0,0 +1,47 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+
+class AwaitLoading extends StatefulWidget {
+  const AwaitLoading({super.key});
+
+  @override
+  State<AwaitLoading> createState() => _AwaitLoadingState();
+}
+
+class _AwaitLoadingState extends State<AwaitLoading> {
+  String text = "";
+
+  Timer? t;
+
+  @override
+  void dispose() {
+    t?.cancel();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    t = Timer(Duration(seconds: 8), () {
+      setState(() {
+        text =
+            "Il semblerait qu'il y ait un problème. Vérifiez que vous êtes connecté·e à internet.";
+      });
+    });
+
+    return Column(
+      children: [
+        Expanded(child: SizedBox()),
+        Center(child: CircularProgressIndicator()),
+        Expanded(
+          child: Center(
+            child: SizedBox(
+              width: 300,
+              child: Text(text, textAlign: TextAlign.center),
+            ),
+          ),
+        ),
+      ],
+    );
+  }
+}

lib/ui/home_page/view_model/home_view_model.dart

@@ -56,7 +56,13 @@ class HomeViewModel extends ChangeNotifier {
 
   Future<Result<void>> _load() async {
     final result2 = await _loadBal();
-    isLoaded = true;
+    switch (result2) {
+      case Ok():
+        isLoaded = true;
+        break;
+      default:
+        break;
+    }
     notifyListeners();
     return result2;
   }

lib/ui/home_page/widgets/home_page.dart

@@ -4,6 +4,7 @@ import 'package:seshat/domain/models/bal.dart';
 import 'package:seshat/ui/core/ui/navigation_bar.dart';
 import 'package:seshat/ui/home_page/view_model/home_view_model.dart';
 import 'package:seshat/ui/home_page/widgets/create_confirmation_popup.dart';
+import 'package:seshat/ui/core/ui/await_loading.dart';
 
 class HomePage extends StatefulWidget {
   const HomePage({super.key, required this.viewModel});
@@ -23,7 +24,7 @@ class _HomePageState extends State<HomePage> {
         listenable: widget.viewModel,
         builder: (context, child) {
           return switch (widget.viewModel.isLoaded) {
-            false => Center(child: CircularProgressIndicator()),
+            false => AwaitLoading(),
             true => switch (widget.viewModel.currentBal == null) {
               true => HomePageOnNoCurrent(widget: widget),
               false => HomePageOnCurrent(widget: widget),

lib/ui/sell_page/view_model/sell_view_model.dart

@@ -71,10 +71,16 @@ class SellViewModel extends ChangeNotifier {
   bool isLoaded = false;
 
   Future<Result<void>> _load() async {
-    final result2 = await _loadBal();
-    isLoaded = true;
+    final result1 = await _loadBal();
+    switch (result1) {
+      case Ok():
+        isLoaded = true;
+        break;
+      default:
+        break;
+    }
     notifyListeners();
-    return result2;
+    return result1;
   }
 
   Future<Result<void>> _loadBal() async {

lib/ui/sell_page/widgets/sell_page.dart

@@ -5,6 +5,7 @@ import 'package:seshat/routing/routes.dart';
 import 'package:seshat/ui/core/ui/navigation_bar.dart';
 import 'package:seshat/ui/sell_page/view_model/sell_view_model.dart';
 import 'package:seshat/ui/sell_page/widgets/scan_screen.dart';
+import 'package:seshat/ui/core/ui/await_loading.dart';
 
 class SellPage extends StatefulWidget {
   const SellPage({super.key, required this.viewModel});
@@ -24,7 +25,7 @@ class _SellPageState extends State<SellPage> {
         listenable: widget.viewModel,
         builder: (context, child) {
           return switch (widget.viewModel.isLoaded) {
-            false => Center(child: CircularProgressIndicator()),
+            false => AwaitLoading(),
             true => switch (widget.viewModel.currentBal) {
               null => Center(
                 child: SizedBox(