Show popup on un-caught exceptions to send errors via email

lib/main.dart

@@ -9,7 +9,6 @@ import 'package:cake_wallet/buy/order.dart';
 import 'package:cake_wallet/entities/preferences_key.dart';
 import 'package:cake_wallet/ionia/ionia_category.dart';
 import 'package:cake_wallet/ionia/ionia_merchant.dart';
-import 'package:cake_wallet/src/screens/failure_page.dart';
 import 'package:cake_wallet/src/widgets/alert_with_two_actions.dart';
 import 'package:cake_wallet/store/yat/yat_store.dart';
 import 'package:cake_wallet/themes/theme_list.dart';
@@ -17,6 +16,7 @@ import 'package:cake_wallet/utils/show_pop_up.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
+import 'package:flutter_mailer/flutter_mailer.dart';
 import 'package:hive/hive.dart';
 import 'package:cake_wallet/di.dart';
 import 'package:path_provider/path_provider.dart';
@@ -57,31 +57,14 @@ Future<void> main() async {
     WidgetsFlutterBinding.ensureInitialized();
 
     FlutterError.onError = (errorDetails) {
-      print("@@@@@@@@@@@@@@@@@ in on error");
-      print(errorDetails.exception.toString());
       _onError(errorDetails);
-      _saveException(errorDetails.exception.toString(), errorDetails.stack);
-    };
-
-    ErrorWidget.builder = (errorDetails) {
-      print("@@@@@@@@@@@@@@@@@ in widget error");
-      // TODO: uncomment
-      // if (kDebugMode) {
-      //   return ErrorWidget(errorDetails.exception);
-      // }
-
-      return FailurePage(
-        error: errorDetails.exception.toString(),
-        stackTrace: errorDetails.stack,
-      );
     };
 
     /// A callback that is invoked when an unhandled error occurs in the root
     /// isolate.
     PlatformDispatcher.instance.onError = (error, stack) {
-      print("@@@@@@@@@@@@@@@");
-      print("PlatformDispatcher.instance.onError");
-      _saveException(error.toString(), stack);
+      _onError(FlutterErrorDetails(exception: error, stack: stack));
+
       return true;
     };
 
@@ -187,12 +170,42 @@ void _saveException(String? error, StackTrace? stackTrace) async {
     }
   };
 
-  await file.writeAsString(jsonEncode(exception), mode: FileMode.append);
+  String separator = "\n\n==========================================================" +
+      "\n==========================================================\n\n";
+
+  await file.writeAsString(
+    jsonEncode(exception) + separator,
+    mode: FileMode.append,
+  );
 }
 
-void _onError(FlutterErrorDetails details) {
-  print("#############");
-  print(details.exception.toString());
+void _sendExceptionFile() async {
+  final appDocDir = await getApplicationDocumentsDirectory();
+
+  final file = File('${appDocDir.path}/error.txt');
+
+  print(file.readAsStringSync());
+
+  final MailOptions mailOptions = MailOptions(
+    subject: 'Mobile App Issue',
+    recipients: ['support@cakewallet.com'],
+    attachments: [file.path],
+  );
+
+  final result = await FlutterMailer.send(mailOptions);
+
+  // clear file content if the error was sent or saved
+  // on android we can't know if it was sent or saved
+  if (result.name == MailerResponse.sent.name ||
+      result.name == MailerResponse.saved.name ||
+      result.name == MailerResponse.android.name) {
+    file.writeAsString("", mode: FileMode.write);
+  }
+}
+
+void _onError(FlutterErrorDetails errorDetails) {
+  _saveException(errorDetails.exception.toString(), errorDetails.stack);
+
   WidgetsBinding.instance.addPostFrameCallback(
       (timeStamp) {
         showPopUp<void>(
@@ -204,12 +217,12 @@ void _onError(FlutterErrorDetails details) {
               alertContent: "Oops, we got some error.\n\nPlease send crash report to our support team to make the application better.",
               rightButtonText: S.of(context).send,
               leftButtonText: "Don't send",
-              actionRightButton: () async {
+              actionRightButton: () {
                 Navigator.of(context).pop();
+                _sendExceptionFile();
               },
               actionLeftButton: () {
                 Navigator.of(context).pop();
-                _saveException(details.exception.toString(), details.stack);
               },
             );
           },

lib/src/screens/failure_page.dart

@@ -1,87 +0,0 @@
-import 'dart:io';
-
-import 'package:cake_wallet/generated/i18n.dart';
-import 'package:cake_wallet/src/widgets/primary_button.dart';
-import 'package:flutter/material.dart';
-import 'package:flutter_mailer/flutter_mailer.dart';
-import 'package:path_provider/path_provider.dart';
-
-class FailurePage extends StatelessWidget {
-  final String? error;
-  final StackTrace? stackTrace;
-
-  FailurePage({Key? key, this.error, this.stackTrace});
-
-  @override
-  Widget build(BuildContext context) {
-    final theme = Theme.of(context);
-    return Scaffold(
-      backgroundColor: Colors.grey.shade400,
-      body: Center(
-        child: Padding(
-          padding: EdgeInsets.symmetric(
-              horizontal: MediaQuery.of(context).size.width * 0.2),
-          child: Column(
-            mainAxisSize: MainAxisSize.min,
-            mainAxisAlignment: MainAxisAlignment.spaceBetween,
-            children: [
-              Icon(
-                Icons.warning,
-                color: theme.errorColor,
-                size: 50,
-              ),
-              Padding(
-                padding: const EdgeInsets.symmetric(vertical: 20),
-                child: Text(
-                  "Oops, we got some error.",
-                  style: theme.textTheme.headline1?.copyWith(fontSize: 20),
-                ),
-              ),
-              Text(
-                "Please send crash report to our support team to make the application better.",
-                textAlign: TextAlign.center,
-                style: theme.textTheme.headline1?.copyWith(fontSize: 16),
-              ),
-              Padding(
-                padding: const EdgeInsets.symmetric(vertical: 20),
-                child: PrimaryButton(
-                  onPressed: _sendExceptionFile,
-                  text: S.of(context).send,
-                  textColor: Colors.white,
-                  color: theme.accentTextTheme.bodyText1!.color!,
-                ),
-              ),
-              PrimaryButton(
-                onPressed: () {
-                },
-                text: "Don't Send",
-                color: Theme.of(context).accentTextTheme.caption!.color!,
-                textColor:
-                    Theme.of(context).primaryTextTheme.headline6!.color!,
-              ),
-            ],
-          ),
-        ),
-      ),
-    );
-  }
-
-  void _sendExceptionFile() async {
-    final appDocDir = await getApplicationDocumentsDirectory();
-
-    final file = File('${appDocDir.path}/error.txt');
-
-    print(file.readAsStringSync());
-
-    final MailOptions mailOptions = MailOptions(
-      subject: 'Mobile App Issue',
-      recipients: ['support@cakewallet.com'],
-      attachments: [file.path],
-    );
-
-    await FlutterMailer.send(mailOptions);
-
-    // clear file content
-    // file.writeAsString("", mode: FileMode.write);
-  }
-}

pubspec_base.yaml

@@ -61,7 +61,7 @@ dependencies:
   permission_handler: ^10.0.0
   device_display_brightness: ^0.0.6
   platform_device_id: ^1.0.1
-  flutter_mailer: ^2.0.1
+  flutter_mailer: ^2.0.2
   cake_backup:
     git:
       url: https://github.com/cake-tech/cake_backup.git