refatcor(diary): Refactored (doesn't work yet though)

lib/features/diary/models/diary_model.dart

@@ -12,25 +12,33 @@ class DiaryModel with _$DiaryModel {
       required DateTime retire,
       required int closed,
       required String comment,
-      required List<Meals> meals}) = _DiaryModel;
+      required List<Meal> meals}) = _DiaryModel;
 
-  factory DiaryModel.fromJson(Map<String, Object?> json) => _$DiaryModelFromJson(json);
+  factory DiaryModel.fromJson(Map<String, Object?> json) =>
+      _$DiaryModelFromJson(json);
 }
 
-class Meals {
-  int? id;
-  String? time;
-  int? type;
-  int? satiety;
-  int? mood;
-  List<Portions>? portions;
-  List<Photos>? photos;
+class Meal {
+  late int id;
+  late String time;
+  late int type;
+  late int satiety;
+  late int mood;
+  List<Portion>? portions;
+  List<Photo>? photos;
 
-  Meals({this.id, this.time, this.type, this.satiety, this.mood, this.portions, this.photos});
+  Meal(
+      {required this.id,
+      required this.time,
+      required this.type,
+      required this.satiety,
+      required this.mood,
+      this.portions,
+      this.photos});
 
-  Meals.fromJson(Map<String, dynamic> json) {
-    List<Portions> portions = [];
-    List<Photos> photos = [];
+  Meal.fromJson(Map<String, dynamic> json) {
+    List<Portion> portions = [];
+    List<Photo> photos = [];
     id = json['id'];
     time = json['time'];
     type = json['type'];
@@ -38,12 +46,12 @@ class Meals {
     mood = json['mood'];
     if (json['portions'] != null) {
       json['portions'].forEach((v) {
-        portions.add(new Portions.fromJson(v));
+        portions.add(new Portion.fromJson(v));
       });
     }
     if (json['photos'] != null) {
       json['photos'].forEach((v) {
-        photos.add(new Photos.fromJson(v));
+        photos.add(new Photo.fromJson(v));
       });
     }
   }
@@ -65,20 +73,19 @@ class Meals {
   }
 }
 
-class Portions {
-  int? id;
-  String? productName;
-  int? quantity;
-  String? portion;
+class Portion {
+  late int id;
+  late String productName;
+  late int quantity;
+  late String portion;
 
-  Portions({this.id, this.productName, this.quantity, this.portion});
+  Portion(
+      {required this.id,
+      required this.productName,
+      required this.quantity,
+      required this.portion});
 
-  Portions.fromJson(Map<String, dynamic> json) {
-    id = json['id'];
-    productName = json['product_name'];
-    quantity = json['quantity'];
-    portion = json['portion'];
-  }
+  Portion.fromJson(v);
 
   Map<String, dynamic> toJson() {
     final Map<String, dynamic> data = new Map<String, dynamic>();
@@ -90,15 +97,19 @@ class Portions {
   }
 }
 
-class Photos {
-  int? id;
-  String? originalName;
-  String? path;
-  int? size;
+class Photo {
+  late int id;
+  late String originalName;
+  late String path;
+  late int size;
 
-  Photos({this.id, this.originalName, this.path, this.size});
+  Photo(
+      {required this.id,
+      required this.originalName,
+      required this.path,
+      required this.size});
 
-  Photos.fromJson(Map<String, dynamic> json) {
+  Photo.fromJson(Map<String, dynamic> json) {
     id = json['id'];
     originalName = json['original_name'];
     path = json['path'];