flutter_wisetronic/lib/models/shipping_rate.dart

import 'dart:convert';

import 'package:flutter/foundation.dart';

class ShippingRate {
  String? name;
  double? price;
  List<Rate>? rates;

  ShippingRate.fromJson(Map<String, dynamic> json)
    : name = json['name'],
      price = double.parse(json['price'].toString()),
      rates = (json['rates'] as List).map((e) => Rate.fromJson(e)).toList();

  Map<String, dynamic> toJson() => {
    'name': name,
    'price': price,
    'rates': rates,
  };

  @override
  bool operator ==(Object other) =>
      identical(this, other) ||
          other is ShippingRate &&
          runtimeType == other.runtimeType &&
          name == other.name &&
          price?.toStringAsFixed(2) == other.price?.toStringAsFixed(2) &&
          listEquals(rates, other.rates);

  @override
  String toString() {
    return json.encode(this);
  }

  @override
  int get hashCode =>
      name.hashCode ^
      price.hashCode ^
      rates.hashCode;
}

class Rate {
  String? name;
  double? rate;

  Rate.fromJson(Map<String, dynamic> json)
    : name = json['name'],
      rate = double.parse(json['rate'].toString());

  Map<String, dynamic> toJson() => {
    'name': name,
    'rate': rate,
  };

  @override
  bool operator ==(Object other) =>
      identical(this, other) ||
          other is Rate &&
          runtimeType == other.runtimeType &&
          name == other.name &&
          rate?.toStringAsFixed(2) == other.rate?.toStringAsFixed(2);

  @override
  String toString() {
    return json.encode(this);
  }

  @override
  int get hashCode =>
      name.hashCode ^
      rate.hashCode;
}