added provider in main.dart

lib/main.dart

@@ -1,10 +1,21 @@
 import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
 
 import 'pages/create_recipe_page.dart';
 import 'pages/overview_page.dart';
+import 'services/providers/recipe_provider.dart';
 
 void main() {
-  runApp(const RecipeJournal());
+  runApp(
+    MultiProvider(
+      providers: [
+        ChangeNotifierProvider(
+          create: (context) => RecipeProvider(),
+        ),
+      ],
+      child: const RecipeJournal(),
+    ),
+  );
 }
 
 class RecipeJournal extends StatelessWidget {

lib/models/recipe.dart

@@ -13,8 +13,8 @@ class Recipe {
   final Duration cookTime;
   final Duration totalTime;
   final List<String> keywords;
-  final MealCategory mealCategory;
+  final MealCategory? mealCategory;
-  final Cuisine cuisine;
+  final Cuisine? cuisine;
 
   Recipe({
     this.id = -1,
@@ -25,8 +25,8 @@ class Recipe {
     this.prepTime = const Duration(),
     this.cookTime = const Duration(),
     this.totalTime = const Duration(),
-    this.mealCategory = MealCategory.notSelected,
+    this.mealCategory,
-    this.cuisine = Cuisine.notSelected,
+    this.cuisine,
     this.ingredients = const [],
     this.keywords = const [],
     this.steps = const [],

lib/services/tools.dart

@@ -0,0 +1,6 @@
+String getEnumValueName<T extends Enum>(T value) {
+  String name =
+      value.name.replaceAllMapped(RegExp(r'[A-Z]'), (match) => ' ${match[0]}');
+  name = name[0].toUpperCase() + name.substring(1);
+  return name;
+}

lib/src/enums.dart

@@ -16,7 +16,6 @@ enum Difficulty {
 }
 
 enum IngredientType {
-  notSelected,
   vegetable,
   meat,
   fish,
@@ -29,7 +28,6 @@ enum IngredientType {
 }
 
 enum MealCategory {
-  notSelected,
   // Main Meals
   breakfast,
   brunch,
@@ -46,7 +44,6 @@ enum MealCategory {
 }
 
 enum Cuisine {
-  notSelected,
   // Asian Cuisines
   chinese,
   japanese,