changes to recipe class and providers

lib/example_data.dart

@@ -1,7 +1,9 @@
+import 'package:rezepte/models/difficulty.dart';
 import 'package:rezepte/models/unit.dart';
 
 import 'models/ingredient.dart';
 import 'constants.dart' as constants;
+import 'models/recipe.dart';
 
 final List<Unit> _weightAndCount = constants.units
     .where((element) =>
@@ -25,3 +27,14 @@ final List<Ingredient> exampleIngredients = [
   Ingredient(title: 'Milch', possibleUnits: _fluid),
   Ingredient(title: 'Limettenblätter', possibleUnits: _count),
 ];
+
+final List<Recipe> exampleRecipes = [
+  Recipe(
+      title: 'Wraps',
+      description: 'Nur ein paar Wraps',
+      difficulty: Difficulty.hard),
+  Recipe(
+      title: 'Burritos',
+      description: 'Nur ein paar Burritos',
+      difficulty: Difficulty.easy),
+];

lib/main.dart

@@ -2,12 +2,16 @@ import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 import 'package:rezepte/pages/create_recipe_page.dart';
 import 'package:rezepte/pages/dashboard_page.dart';
+import 'package:rezepte/services/providers/recipe_list_provider.dart';
 import 'package:rezepte/services/providers/recipe_provider.dart';
 
 import 'theme.dart';
 
 void main() {
   runApp(MultiProvider(providers: [
+    ChangeNotifierProvider(
+      create: (_) => RecipeListProvider(),
+    ),
     ChangeNotifierProvider(
       create: (_) => RecipeProvider(),
     ),

lib/models/recipe.dart

@@ -6,12 +6,31 @@ class Recipe {
   final String title;
   final String description;
   final Difficulty? difficulty;
-  final List<IngredientListEntry> ingredients = [];
-  final List<CookingStep> steps = [];
+  final List<IngredientListEntry> ingredients;
+  final List<CookingStep> steps;
 
   Recipe({
     required this.title,
     this.description = '',
     this.difficulty,
+    this.ingredients = const [],
+    this.steps = const [],
   });
+
+  void addIngredient(IngredientListEntry ingredient) =>
+      ingredients.add(ingredient);
+
+  void clearIngredients() => ingredients.clear();
+
+  void removeIngredientAt(int index) {
+    ingredients.removeAt(index);
+  }
+
+  void removeIngredient(IngredientListEntry ingredient) {
+    ingredients.removeWhere((element) => element == ingredient);
+  }
+
+  void addStep(CookingStep step) => steps.add(step);
+
+  void removeStepAt(int index) => steps.removeAt(index);
 }

lib/services/providers/recipe_list_provider.dart

@@ -0,0 +1,26 @@
+import 'package:flutter/material.dart';
+
+import '../../models/recipe.dart';
+
+class RecipeListProvider extends ChangeNotifier {
+  final List<Recipe> _recipes = [];
+
+  set recipes(List<Recipe> recipes) {
+    _recipes.clear();
+    _recipes.addAll(recipes);
+    notifyListeners();
+  }
+
+  List<Recipe> get recipes => _recipes;
+
+  void clearRecipes({silent = false}) {
+    _recipes.clear();
+
+    if (!silent) notifyListeners();
+  }
+
+  void addRecipe(Recipe recipe, {silent = false}) {
+    _recipes.add(recipe);
+    if (!silent) notifyListeners();
+  }
+}

lib/services/providers/recipe_provider.dart

@@ -62,21 +62,25 @@ class RecipeProvider extends ChangeNotifier implements Recipe {
   @override
   List<IngredientListEntry> get ingredients => _ingredients;
 
+  @override
   void addIngredient(IngredientListEntry ingredient) {
     _ingredients.add(ingredient);
     notifyListeners();
   }
 
+  @override
   void clearIngredients({silent = false}) {
     ingredients.clear();
     if (!silent) notifyListeners();
   }
 
+  @override
   void removeIngredientAt(int index, {silent = false}) {
     ingredients.removeAt(index);
     if (!silent) notifyListeners();
   }
 
+  @override
   void removeIngredient(IngredientListEntry ingredient, {silent = false}) {
     ingredients.removeWhere((element) => element == ingredient);
     if (!silent) notifyListeners();
@@ -85,11 +89,13 @@ class RecipeProvider extends ChangeNotifier implements Recipe {
   @override
   List<CookingStep> get steps => _steps;
 
+  @override
   void addStep(CookingStep step, {silent = false}) {
     steps.add(step);
     if (!silent) notifyListeners();
   }
 
+  @override
   void removeStepAt(int index, {silent = false}) {
     steps.removeAt(index);
     if (!silent) notifyListeners();

lib/widgets/recipe_list.dart

@@ -0,0 +1,21 @@
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+import 'package:rezepte/services/providers/recipe_list_provider.dart';
+
+class RecipeList extends StatelessWidget {
+  const RecipeList({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    final recipes =
+        Provider.of<RecipeListProvider>(context, listen: true).recipes;
+    return ListView.builder(
+      itemCount: recipes.length,
+      itemBuilder: _recipeListBuilder,
+    );
+  }
+
+  Widget? _recipeListBuilder(BuildContext context, int index) {
+    return Card();
+  }
+}