Finished custom sorting of deliveries

lib/feature/delivery/overview/model/sorting_information.dart

@@ -0,0 +1,54 @@
+import 'package:flutter/cupertino.dart';
+
+class SortingInformation {
+  String deliveryId;
+  int position;
+
+  SortingInformation({required this.deliveryId, required this.position});
+
+  static Map<String, dynamic> toJson(SortingInformation info) {
+    return {"delivery_id": info.deliveryId, "position": info.position};
+  }
+
+  static SortingInformation fromJson(Map<String, dynamic> json) {
+    return SortingInformation(
+      deliveryId: json["delivery_id"].toString(),
+      position: json["position"],
+    );
+  }
+}
+
+class SortingInformationContainer {
+  List<SortingInformation> sorting;
+
+  SortingInformationContainer({required this.sorting});
+
+  void sort() {
+    sorting.sort((a, b) => a.position.compareTo(b.position));
+  }
+
+  static SortingInformationContainer fromJson(Map<String, dynamic> json) {
+    SortingInformationContainer container = SortingInformationContainer(
+      sorting: [],
+    );
+
+    for (final info in json["sorting"]) {
+      container.sorting.add(SortingInformation.fromJson(info));
+    }
+
+    return container;
+  }
+
+  Map<String, dynamic> toJson() {
+    return {
+      "sorting":
+          sorting.map((info) => SortingInformation.toJson(info)).toList(),
+    };
+  }
+
+  SortingInformationContainer copyWith({List<SortingInformation>? sorting}) {
+    return SortingInformationContainer(
+      sorting: sorting ?? this.sorting,
+    );
+  }
+}