refactoring

lib/models/ingredient.dart

@@ -9,21 +9,25 @@ class Ingredient {
   final String title;
   List<Unit> possibleUnits;
   List<String> preferredBrands;
+  IngredientType type;
 
   Ingredient({
     required this.title,
+    required this.type,
     this.possibleUnits = const [],
     this.preferredBrands = const [],
   });
 
   factory Ingredient.fromJson(Map<String, dynamic> json) => Ingredient(
         title: json['title'] as String,
+        type: json['ingredient_type'] as IngredientType,
         possibleUnits: _unitsFromJson(json['possibleUnits']),
         preferredBrands: json['preferredBrands'] as List<String>,
       );
 
   Map<String, dynamic> toJson() => {
         'title': title,
+        'ingredient_type': type,
         'possibleUnits': possibleUnits.map((e) => e.toJson()).toList(),
         'preferredBrands': preferredBrands,
       };
@@ -42,3 +46,15 @@ class Ingredient {
   static List<Unit> _unitsFromJson(List<Map<String, dynamic>> jsonList) =>
       jsonList.map((e) => Unit.fromJson(e)).toList();
 }
+
+enum IngredientType {
+  vegetable,
+  meat,
+  fish,
+  grain,
+  fruit,
+  dairy,
+  fatsAndOil,
+  spice,
+  other,
+}