refactored willpopscope

lib/pages/create_recipe_page.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 import 'package:rezepte/widgets/ingredients_bottomsheet.dart';
+import 'package:rezepte/widgets/will_pop_scope.dart';
 import '../models/difficulty.dart';
 import '../models/ingredient_list_entry.dart';
 import '../services/providers/recipe_provider.dart';
@@ -25,8 +26,9 @@ class _CreateRecipeState extends State<CreateRecipe> {
   @override
   Widget build(BuildContext context) {
     recipe = Provider.of<RecipeProvider>(context);
-    return WillPopScope(
-      onWillPop: _onWillPop,
+    return CustomWillPopScope(
+      context,
+      ignore: recipe.isEmpty,
       child: Scaffold(
         appBar: AppBar(
           title: const Text('Create Recipe'),
@@ -111,29 +113,4 @@ class _CreateRecipeState extends State<CreateRecipe> {
       ),
     );
   }
-
-  Future<bool> _onWillPop() {
-    if (recipe.isEmpty) {
-      return Future<bool>(
-        () {
-          return true;
-        },
-      );
-    }
-    return showDialog<bool>(
-      context: context,
-      builder: (context) => AlertDialog(
-        title: const Text('Leave the page?'),
-        content: const Text('Progress will be lost.'),
-        actions: [
-          TextButton(
-              onPressed: () => Navigator.of(context).pop(false),
-              child: const Text('cancel')),
-          TextButton(
-              onPressed: () => Navigator.of(context).pop(true),
-              child: const Text('leave')),
-        ],
-      ),
-    ).then((value) => value ?? false);
-  }
 }

lib/widgets/will_pop_scope.dart

@@ -0,0 +1,48 @@
+import 'package:flutter/material.dart';
+
+class CustomWillPopScope extends StatelessWidget {
+  const CustomWillPopScope(
+    this.context, {
+    super.key,
+    required this.child,
+    this.ignore = false,
+  });
+
+  final Widget child;
+  final BuildContext context;
+
+  /// If [ignore] is true, WillPopScope will automatically pop.
+  final bool ignore;
+
+  Future<bool> _onWillPop() {
+    if (ignore) {
+      return Future<bool>(
+        () {
+          return true;
+        },
+      );
+    }
+    return showDialog<bool>(
+      context: context,
+      builder: _willPopDialogBuilder,
+    ).then((value) => value ?? false);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return WillPopScope(onWillPop: _onWillPop, child: child);
+  }
+}
+
+Widget _willPopDialogBuilder(context) => AlertDialog(
+      title: const Text('Leave the page?'),
+      content: const Text('Progress will be lost.'),
+      actions: [
+        TextButton(
+            onPressed: () => Navigator.of(context).pop(false),
+            child: const Text('cancel')),
+        TextButton(
+            onPressed: () => Navigator.of(context).pop(true),
+            child: const Text('leave')),
+      ],
+    );