Fix crash when a requests fails in non-widget mode (aka on background-receive): Cannot show toasts without an UI

flutter/lib/main.dart

@@ -205,7 +205,7 @@ void main() async {
 
     final appLaunchNotification = await flutterLocalNotificationsPlugin.getNotificationAppLaunchDetails();
     if (appLaunchNotification != null) {
-      // Use has launched SCN by clicking on a loca notifiaction, if it was a summary or message notifiaction open the corresponding screen
+      // Use has launched SCN by clicking on a local notifiaction, if it was a summary or message notifiaction open the corresponding screen
       // This is android only
       //TODO same on iOS, somehow??
       ApplicationLog.info('App launched by notification: ${appLaunchNotification.notificationResponse?.id}');
@@ -216,6 +216,8 @@ void main() async {
 
   ApplicationLog.debug('[INIT] Application started');
 
+  Globals().appWidgetInitialized = true;
+
   runApp(
     MultiProvider(
       providers: [

flutter/lib/state/globals.dart

@@ -17,6 +17,8 @@ class Globals {
 
   bool _initialized = false;
 
+  bool appWidgetInitialized = false;
+
   String appName = '';
   String packageName = '';
   String version = '';

flutter/lib/utils/toaster.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:simplecloudnotifier/state/globals.dart';
 import 'package:toastification/toastification.dart';
 
 class Toaster {
@@ -10,6 +11,13 @@ class Toaster {
   static final borderRadius = BorderRadius.circular(4.0);
 
   static void simple(String title) {
+    print('[TOAST]: [[SIMPLE]] $title');
+
+    if (!Globals().appWidgetInitialized) {
+      print('[TOAST]: Cannot show simple-toast - app<widget> not initialized - skipping');
+      return;
+    }
+
     toastification.show(
       type: ToastificationType.success,
       style: ToastificationStyle.simple,
@@ -17,7 +25,7 @@ class Toaster {
       description: Text(title),
       autoCloseDuration: autoCloseDuration,
       borderRadius: borderRadius,
-      closeButtonShowType: CloseButtonShowType.none,
+      closeButton: ToastCloseButton(showType: CloseButtonShowType.none),
       alignment: alignment,
       animationDuration: animationDuration,
       pauseOnHover: false,
@@ -28,6 +36,13 @@ class Toaster {
   }
 
   static void success(String title, String message) {
+    print('[TOAST]: [[SUCC]] $title:\n$message');
+
+    if (!Globals().appWidgetInitialized) {
+      print('[TOAST]: Cannot show succ-toast - app<widget> not initialized - skipping');
+      return;
+    }
+
     toastification.show(
       type: ToastificationType.success,
       style: ToastificationStyle.flatColored,
@@ -35,7 +50,7 @@ class Toaster {
       description: Text(message),
       autoCloseDuration: autoCloseDuration,
       borderRadius: borderRadius,
-      closeButtonShowType: CloseButtonShowType.none,
+      closeButton: ToastCloseButton(showType: CloseButtonShowType.none),
       alignment: alignment,
       animationDuration: animationDuration,
       pauseOnHover: false,
@@ -46,6 +61,13 @@ class Toaster {
   }
 
   static void info(String title, String message) {
+    print('[TOAST]: [[INFO]] $title:\n$message');
+
+    if (!Globals().appWidgetInitialized) {
+      print('[TOAST]: Cannot show info-toast - app<widget> not initialized - skipping');
+      return;
+    }
+
     toastification.show(
       type: ToastificationType.info,
       style: ToastificationStyle.flatColored,
@@ -53,7 +75,7 @@ class Toaster {
       description: Text(message),
       autoCloseDuration: autoCloseDuration,
       borderRadius: borderRadius,
-      closeButtonShowType: CloseButtonShowType.none,
+      closeButton: ToastCloseButton(showType: CloseButtonShowType.none),
       alignment: alignment,
       animationDuration: animationDuration,
       pauseOnHover: false,
@@ -64,6 +86,13 @@ class Toaster {
   }
 
   static void warn(String title, String message) {
+    print('[TOAST]: [[WARN]] $title:\n$message');
+
+    if (!Globals().appWidgetInitialized) {
+      print('[TOAST]: Cannot show warn-toast - app<widget> not initialized - skipping');
+      return;
+    }
+
     toastification.show(
       type: ToastificationType.warning,
       style: ToastificationStyle.flatColored,
@@ -71,7 +100,7 @@ class Toaster {
       description: Text(message),
       autoCloseDuration: autoCloseDuration,
       borderRadius: borderRadius,
-      closeButtonShowType: CloseButtonShowType.none,
+      closeButton: ToastCloseButton(showType: CloseButtonShowType.none),
       alignment: alignment,
       animationDuration: animationDuration,
       pauseOnHover: false,
@@ -82,6 +111,13 @@ class Toaster {
   }
 
   static void error(String title, String message) {
+    print('[TOAST]: [[ERROR]] $title:\n$message');
+
+    if (!Globals().appWidgetInitialized) {
+      print('[TOAST]: Cannot show error-toast - app<widget> not initialized - skipping');
+      return;
+    }
+
     toastification.show(
       type: ToastificationType.error,
       style: ToastificationStyle.flatColored,
@@ -89,7 +125,7 @@ class Toaster {
       description: Text(message),
       autoCloseDuration: autoCloseDuration,
       borderRadius: borderRadius,
-      closeButtonShowType: CloseButtonShowType.none,
+      closeButton: ToastCloseButton(showType: CloseButtonShowType.none),
       alignment: alignment,
       animationDuration: animationDuration,
       pauseOnHover: false,