Abschnitt 10

lib/providers/favorites_provider.dart

@@ -1,6 +1,7 @@
-import 'package:flutter_meals/models/meal.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 
+import 'package:flutter_meals/models/meal.dart';
+
 class FavoriteMealsNotifier extends StateNotifier<List<Meal>> {
   FavoriteMealsNotifier() : super([]);
 

lib/providers/filters_provider.dart

@@ -1,6 +1,7 @@
-import 'package:flutter_meals/providers/meals_provider.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 
+import 'package:flutter_meals/providers/meals_provider.dart';
+
 enum Filter {
   glutenFree,
   lactoseFree,
@@ -11,17 +12,18 @@ enum Filter {
 class FiltersNotifier extends StateNotifier<Map<Filter, bool>> {
   FiltersNotifier()
       : super({
-          Filter.glutenFree: false,
-          Filter.lactoseFree: false,
-          Filter.vegetarian: false,
-          Filter.vegan: false
-        });
+    Filter.glutenFree: false,
+    Filter.lactoseFree: false,
+    Filter.vegetarian: false,
+    Filter.vegan: false
+  });
 
   void setFilters(Map<Filter, bool> chosenFilters) {
     state = chosenFilters;
   }
 
   void setFilter(Filter filter, bool isActive) {
+    // state[filter] = isActive; // not allowed! => mutating state
     state = {
       ...state,
       filter: isActive,
@@ -30,8 +32,8 @@ class FiltersNotifier extends StateNotifier<Map<Filter, bool>> {
 }
 
 final filtersProvider =
-    StateNotifierProvider<FiltersNotifier, Map<Filter, bool>>(
-  (ref) => FiltersNotifier(),
+StateNotifierProvider<FiltersNotifier, Map<Filter, bool>>(
+      (ref) => FiltersNotifier(),
 );
 
 final filteredMealsProvider = Provider((ref) {
@@ -53,4 +55,4 @@ final filteredMealsProvider = Provider((ref) {
     }
     return true;
   }).toList();
-});
+});

lib/providers/meals_provider.dart

@@ -1,6 +1,7 @@
-import 'package:flutter_meals/data/dummy_data.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 
+import 'package:flutter_meals/data/dummy_data.dart';
+
 final mealsProvider = Provider((ref) {
   return dummyMeals;
 });