Simple recipe provider changes

lib/models/recipe.dart

@@ -5,7 +5,7 @@ import 'steps.dart';
 class Recipe {
   final String title;
   final String description;
-  final DifficultyUtil? difficulty;
+  final Difficulty? difficulty;
   final List<Ingredient> ingredients = [];
   final Steps steps = Steps();
 

lib/services/providers/recipe_provider.dart

@@ -1,19 +1,38 @@
 import 'package:flutter/material.dart';
+import 'package:rezepte/models/difficulty.dart';
+import 'package:rezepte/models/ingredient.dart';
+import 'package:rezepte/models/steps.dart';
 
 import '../../models/recipe.dart';
 
-class RecipeProvider extends ChangeNotifier {
+class RecipeProvider extends ChangeNotifier implements Recipe {
-  Recipe? _selectedRecipe;
+  String _title = '';
-
+  String _description = '';
-  Recipe? get selectedRecipe => _selectedRecipe;
+  Difficulty? _difficulty;
-
+  List<Ingredient> _ingredients = [];
-  set selectedRecipe(Recipe? recipe) {
+  Steps _steps = Steps();
-    _selectedRecipe = recipe;
-    notifyListeners();
-  }
 
   void clearRecipe() {
-    _selectedRecipe = null;
+    _title = '';
+    _description = '';
+    _difficulty = null;
+    _ingredients = [];
+    _steps = Steps();
     notifyListeners();
   }
+
+  @override
+  String get description => _description;
+
+  @override
+  String get title => _title;
+
+  @override
+  Difficulty? get difficulty => _difficulty;
+
+  @override
+  List<Ingredient> get ingredients => _ingredients;
+
+  @override
+  Steps get steps => _steps;
 }