add update shipments

lib/domain/entities/carton.dart

@@ -0,0 +1,161 @@
+import 'package:cloud_firestore/cloud_firestore.dart';
+import 'package:fcs/domain/entities/discount_by_weight.dart';
+import 'package:fcs/domain/entities/rate.dart';
+import 'package:fcs/domain/vo/shipment_status.dart';
+import 'package:fcs/domain/vo/delivery_address.dart';
+
+import 'cargo_type.dart';
+import 'package.dart';
+
+class Carton {
+  String id;
+  String shipmentNumber;
+  String senderFCSID;
+  String senderName;
+  String receiverFCSID;
+  String receiverName;
+  String receiverAddress;
+  String receiverNumber;
+  String boxNumber;
+  String status;
+  String cargoDesc;
+  String desc;
+  double width;
+  double height;
+  double length;
+  int shipmentWeight;
+  bool isChecked;
+  String cartonType;
+  String fcsID;
+  String userName;
+
+  int rate;
+  int weight;
+  String packageType;
+  String pickUpID;
+  List<String> photos;
+  String remark;
+  DateTime arrivedDate;
+
+  List<Package> packages;
+
+  List<CargoType> cargoTypes;
+
+  DeliveryAddress deliveryAddress;
+
+  int get amount => rate != null && weight != null ? rate * weight : 0;
+
+  String get packageNumber =>
+      shipmentNumber + "-" + receiverNumber + " #" + boxNumber;
+  double get price => rate.toDouble() * weight;
+
+  double get actualWeight =>
+      cargoTypes == null ? 0 : cargoTypes.fold(0, (p, e) => e.weight + p);
+
+  double getShipmentWeight(double volumetricRatio) {
+    if (length == null ||
+        length <= 0 ||
+        width == null ||
+        width <= 0 ||
+        height == null ||
+        height <= 0 ||
+        volumetricRatio == null ||
+        volumetricRatio <= 0) return 0;
+
+    return (length * width * height) / volumetricRatio;
+  }
+
+  /// calAmount returns total amount
+  double calAmount(Rate rate) {
+    // get shipment weight
+    double volume = (length ?? 0) * (width ?? 0) * (height ?? 0);
+    double sw = volume / rate.volumetricRatio ?? 0;
+
+    // get actual weight
+    double aw = cargoTypes.fold(0.0, (p, c) => p + c.weight);
+    if (aw == 0 || sw == 0) return 0;
+
+    DiscountByWeight discountByWeight =
+        rate.getDiscountByWeight(sw > aw ? sw : aw);
+
+    double total = 0;
+    cargoTypes.forEach((e) {
+      double cargoWeight = aw > sw ? e.weight : e.weight / aw * sw;
+      double r =
+          e.rate - (discountByWeight != null ? discountByWeight.discount : 0);
+      double amount = cargoWeight * r;
+      total += amount;
+    });
+    return total;
+  }
+
+  List<ShipmentStatus> shipmentHistory;
+
+  Carton(
+      {this.id,
+      this.shipmentNumber,
+      this.senderFCSID,
+      this.senderName,
+      this.receiverFCSID,
+      this.receiverName,
+      this.receiverNumber,
+      this.receiverAddress,
+      this.boxNumber,
+      this.desc,
+      this.width,
+      this.height,
+      this.length,
+      this.shipmentWeight,
+      this.isChecked = false,
+      this.cartonType,
+      this.fcsID,
+      this.userName,
+      this.rate = 0,
+      this.weight = 0,
+      this.packageType,
+      this.pickUpID,
+      this.remark,
+      this.status,
+      this.arrivedDate,
+      this.cargoDesc,
+      this.shipmentHistory,
+      this.packages,
+      this.cargoTypes,
+      this.deliveryAddress});
+
+  Map<String, dynamic> toMap() {
+    List _cargoTypes = cargoTypes.map((c) => c.toMap()).toList();
+    return {
+      "id": id,
+      'cargo_types': _cargoTypes,
+      'length': length,
+      'width': width,
+      'height': height,
+      'delivery_address': deliveryAddress.toMap(),
+      'carton_type': cartonType,
+    };
+  }
+
+  factory Carton.fromMap(Map<String, dynamic> map, String docID) {
+    var _arrivedDate = (map['arrived_date'] as Timestamp);
+    var da = map['delivery_address'];
+    var _da = da != null ? DeliveryAddress.fromMap(da, da["id"]) : null;
+    var cargoTypesMaps = List<Map<String, dynamic>>.from(map['cargo_types']);
+    var cargoTypes =
+        cargoTypesMaps.map((e) => CargoType.fromMap(e, e["id"])).toList();
+    return Carton(
+        id: docID,
+        arrivedDate: _arrivedDate != null ? _arrivedDate.toDate() : null,
+        shipmentNumber: map['shipment_number'],
+        receiverNumber: map['receiver_number'],
+        boxNumber: map['box_number'],
+        length: map['length'],
+        width: map['width'],
+        height: map['height'],
+        userName: map['user_name'],
+        fcsID: map['fcs_id'],
+        cartonType: map['carton_type'],
+        deliveryAddress: _da,
+        cargoTypes: cargoTypes);
+  }
+}