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import 'dart:convert';
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import 'Storage.dart';
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import '../config/Config.dart';
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class CartServices {
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static addCart(item) async {
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//把对象转换成Map类型的数据
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item = CartServices.formatCartData(item);
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/*
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1、获取本地存储的cartList数据
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2、判断cartList是否有数据
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有数据：
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1、判断购物车有没有当前数据：
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有当前数据：
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1、让购物车中的当前数据数量 等于以前的数量+现在的数量
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2、重新写入本地存储
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没有当前数据：
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1、把购物车cartList的数据和当前数据拼接，拼接后重新写入本地存储。
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没有数据：
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1、把当前商品数据以及属性数据放在数组中然后写入本地存储
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List list=[
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{"_id": "1",
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"title": "磨砂牛皮男休闲鞋-有属性",
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"price": 688,
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"selectedAttr": "牛皮 ,系带,黄色",
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"count": 4,
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"pic":"public\upload\RinsvExKu7Ed-ocs_7W1DxYO.png",
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"checked": true
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},
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{"_id": "2",
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"title": "磨xxxxxxxxxxxxx",
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"price": 688,
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"selectedAttr": "牛皮 ,系带,黄色",
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"count": 2,
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"pic":"public\upload\RinsvExKu7Ed-ocs_7W1DxYO.png",
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"checked": true
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}
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];
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*/
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try {
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List cartListData = json.decode(await Storage.getString('cartList'));
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//判断购物车有没有当前数据
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bool hasData = cartListData.any((value) {
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return value['_id'] == item['_id'] &&
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value['selectedAttr'] == item['selectedAttr'];
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});
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if (hasData) {
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for (var i = 0; i < cartListData.length; i++) {
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if (cartListData[i]['_id'] == item['_id'] &&
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cartListData[i]['selectedAttr'] == item['selectedAttr']) {
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cartListData[i]["count"] = cartListData[i]["count"] + 1;
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}
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}
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await Storage.setString('cartList', json.encode(cartListData));
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} else {
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cartListData.add(item);
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await Storage.setString('cartList', json.encode(cartListData));
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}
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} catch (e) {
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List tempList = [];
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tempList.add(item);
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await Storage.setString('cartList', json.encode(tempList));
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}
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}
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//过滤数据
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static formatCartData(item) {
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//处理图片
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String pic = item.pic;
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pic = Config.domain + pic.replaceAll('\\', '/');
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final Map data = new Map<String, dynamic>();
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data['_id'] = item.sId;
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data['title'] = item.num;
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//处理 string 和int类型的价格
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if (item.price is int || item.price is double) {
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data['price'] = item.price;
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} else {
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data['price'] = double.parse(item.price);
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}
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data['selectedAttr'] = item.selectedAttr;
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data['count'] = item.count;
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data['pic'] = pic;
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//是否选中
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data['checked'] = true;
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return data;
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}
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//获取购物车选中的数据
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static getCheckOutData() async {
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List cartListData = [];
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List tempCheckOutData = [];
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try {
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cartListData = json.decode(await Storage.getString('cartList'));
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} catch (e) {
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cartListData = [];
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}
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for (var i = 0; i < cartListData.length; i++) {
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if (cartListData[i]["checked"] == true) {
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tempCheckOutData.add(cartListData[i]);
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}
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}
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return tempCheckOutData;
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}
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}
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