cubetiq_dart_shared/example/my_cart_example.dart

78 lines
1.2 KiB
Dart

import 'dart:convert';
import 'package:cubetiq/interfaces.dart';
void main(List<String> args) {
MyCart.addCart(
Cart(1, 'Apple', 1),
);
MyCart.show();
MyCart.addCart(
Cart(1, 'Apple', 2),
);
MyCart.show();
MyCart.inc(1, qty: 2);
MyCart.show();
MyCart.dec(1, qty: 4);
MyCart.show();
}
class Cart implements ToJson {
final int id;
final String name;
double qty;
Cart(this.id, this.name, this.qty);
@override
Map toJson() {
return {
'id': id,
'name': name,
'qty': qty,
};
}
}
class MyCart {
static final Map<int, Cart> carts = {};
static void inc(int id, {double qty = 1}) {
if (carts.containsKey(id)) {
carts[id]!.qty += qty;
}
}
static void dec(int id, {double qty = 1}) {
if (carts.containsKey(id)) {
carts[id]!.qty -= qty;
}
}
static void addCart(Cart cart) {
if (carts.containsKey(cart.id)) {
carts[cart.id]!.qty += cart.qty;
} else {
carts[cart.id] = cart;
}
}
static void removeCart(Cart cart) {
if (carts.containsKey(cart.id)) {
carts.remove(cart.id);
}
}
static void show() {
var data = carts.map((key, value) => MapEntry(key, jsonEncode(value)));
print('$data');
}
}