E_WeChat/packageA/shopping/index.js

const _Http = getApp().globalData.http;
let downCount = {};
Page({
    data: {
        loading: true,
        list: [],
        results: [], //选中结果
        sa_brandid: null, //当前选中品牌id
        sum: 0, //价格合
        yfsum: 0, //运费合
        classList: [], //生成订单时所选
    },
    onLoad(options) {
        this.getList()
    },
    clickBut(e) {
        this.data.classList.length >= 2 ? wx.showToast({
            title: '请选择订单领域(订单只允许同品牌/同领域的商品)',
            icon: "none",
            duration: 3000
        }) : this.handleSubmit(0);
    },
    /* 提交 */
    submit(e) {
        this.handleSubmit(e.detail.value)
    },
    handleSubmit(index) {
        let data = this.data.classList[index];
        _Http.basic({
            "id": 20221128183202,
            "content": {
                "tradefield": data.type, //必选
                "items": data.list.map(v => {
                    return {
                        "sa_orderitemsid": 0,
                        "itemid": v.itemid,
                        "sa_brandid": v.sa_brandid,
                        "qty": v.qty
                    }
                })
            }
        }).then(res => {
            console.log("转化订单", res)
            if (res.msg != '成功') return wx.showToast({
                title: 'res.msg',
                icon: "none"
            });
            wx.showModal({
                title: '提示',
                content: '生成成功!是否立即前往',
                complete: (s) => {
                    if (s.confirm) {
                        wx.navigateTo({
                            url: '/packageA/orderForm/detail?id=' + res.data.sa_orderid,
                        })
                    }
                }
            });
            this.getList();
        })
    },
    /* 获取列表 */
    getList() {
        _Http.basic({
            "id": 20220924095302,
            "content": {
                nocache: true,
                "pageNumber": 1,
                "pageSize": getApp().globalData.num + 5,
                "where": {
                    "condition": ""
                }
            }
        }).then(res => {
            console.log('购物车列表', res)
            if (res.msg != '成功') return wx.showToast({
                title: res.msg,
                icon: "none"
            })
            this.setData({
                list: res.data,
                loading: false
            });
            if (wx.getStorageSync('shopping')) {
                this.setData({
                    ...wx.getStorageSync('shopping')
                });
                this.computeSum();
            }
        })
    },
    /* 切换选中项 */
    changeResults(e, my = false) {
        const {
            item
        } = my ? e : e.currentTarget.dataset;
        let results = this.data.results,
            sa_brandid = this.data.sa_brandid;
        if (sa_brandid && sa_brandid != item.sa_brandid) return;
        if (results.length == 0) {
            results.push(item.sa_shoppingcartid);
            sa_brandid = item.sa_brandid;
        } else {
            let index = results.findIndex(v => v == item.sa_shoppingcartid)
            if (index == -1) {
                results.push(item.sa_shoppingcartid);
            } else {
                results.splice(index, 1);
                if (results.length == 0) sa_brandid = null;
            }
        };
        this.setData({
            results,
            sa_brandid
        })
        this.computeSum();
    },
    /* 计算总价/产品领域分类 */
    computeSum() {
        let results = this.data.results,
            sum = 0,
            yfsum = 0,
            deteleList = [],
            classList = [];
        if (results.length) results.forEach((v, i) => {
            let item = this.data.list.find(va => va.sa_shoppingcartid == v);
            if (item) {
                sum += (item.qty * item.gradeprice).toFixed(2) - 0;
                /* 领域分类 */
                let index = classList.findIndex(value => value.type == item.tradefield_shoppingcart);
                if (index == -1) {
                    classList.push({
                        type: item.tradefield_shoppingcart,
                        list: [item],
                        name: item.tradefield_shoppingcart + "(1件商品)"
                    })
                } else {
                    classList[index].list.push(item)
                    classList[index].name = classList[index].type + `(${classList[index].list.length}件商品)`
                }
            } else {
                deteleList.push(i)
            }
        });
        if (deteleList.length) {
            deteleList.forEach(v => {
                results.splice(v, 1);
            });
            getApp().globalData.num = getApp().globalData.num - deteleList.length;
        };
        let sa_brandid = results.length ? this.data.sa_brandid : null;
        wx.setStorageSync('shopping', {
            results,
            sa_brandid
        })
        this.setData({
            sum,
            yfsum,
            results,
            sa_brandid,
            classList
        })
    },
    /* 删除产品 */
    deteleItem(e) {
        const {
            item
        } = e.currentTarget.dataset;
        _Http.basic({
            "id": 20220924095202,
            "content": {
                "sa_shoppingcartids": [item.sa_shoppingcartid]
            }
        }).then(res => {
            if (res.msg != '成功') return wx.showToast({
                title: res.msg,
                icon: "none"
            });
            this.setData({
                list: this.data.list.filter(v => v.sa_shoppingcartid != item.sa_shoppingcartid)
            })
            if (this.data.results.some(v => v == item.sa_shoppingcartid)) this.changeResults({
                item
            }, true);
            getApp().globalData.num = getApp().globalData.num - 1;
        })
    },
    /* 步进器调整 */
    stepperChange(e) {
        const {
            index
        } = e.currentTarget.dataset;
        let item = this.data.list[index];
        item.qty = e.detail;
        this.setData({
            [`list[${index}]`]: item
        })
        this.computeSum();
        clearTimeout(downCount['count' + index])
        downCount['count' + index] = setTimeout(() => {
            _Http.basic({
                "id": 20220924104302,
                "content": {
                    "sa_shoppingcartid": item.sa_shoppingcartid,
                    "qty": item.qty
                },
            }, false).then(res => {
                console.log("修改数量", res)
            })
        }, 2000)
    },
})