twong329/view/xcx/pages/index/index.js

const app = getApp();
import wxh from '../../utils/wxh.js';
import {
    getIndexData,
    getCoupons,
    getTemlIds,
    getLiveList,
    getNotifications
} from '../../api/api.js';
import {
    CACHE_SUBSCRIBE_MESSAGE
} from '../../config.js';
import {
    getCategoryList,
    getProductHot,
    getProductslist
} from '../../api/store.js';
import {
    getCouponReceive
} from '../../api/user.js';
import {
    getSeckillIndexTime,
    getSeckillList
} from '../../api/activity.js';

import Util from '../../utils/util.js';
import d from '../../utils/d.js';

const CATE_BLACKHOLE_ID = 199
const PAGE_LIMIT = 20
const THROTTLE_TIME = 100 // 滚动回调限流 ms
const HEIGHT_OF_ROW = 500 // 摘抄自 css, 商品高度,包含图片文字 margin. rpx
const ITEM_NUM_OF_ROW = 2 // 设计为一行 2 个元素

Page({
    /**
     * 页面的初始数据
     */
    data: {
        CATE_BLACKHOLE_ID: CATE_BLACKHOLE_ID,
        logoUrl: '', // 左上方 logo
        prodCates: [], // 分类列表/活动列表 （目前只有一个，就是“活动”）
        banner: [], // 顶部 banner
        itemNew: [], // 跑马灯列表
        menus: [],
        getCouponList: [], //@deprecated 
        activity: [],
        timeList: [], //@deprecated 
        killIndex: 0, //@deprecated 点击当前index值；
        seckillTimeIndex: 0, //@deprecated 当前秒杀index；
        killIndexTime: 0, //@deprecated 点击当前index值所对应的秒杀时间；
        killIndexLen: 0, //@deprecated 当前秒杀的产品列表长度
        seckillList: [], //@deprecated 
        scrollLeft: 0, //@deprecated 
        status: 1, //@deprecated 
        lovely: [], //@deprecated 
        info: {
            fastList: [],
            bastBanner: [], // 精品推荐 banner
            firstList: [], // 首发新品
            bastList: [] // 精品推荐
        },
        avtiveIndex: 0, // 轮播图索引
        likeInfo: [], // 热门榜单
        benefit: [], // 促销单品
        hotProducts: [], // 海量精品 ？
        indicatorDots: false, // 跑马灯轮播图不带点
        circular: true, // 轮播图圆点
        autoplay: true, // 跑马灯轮播图自动播放
        intervalNew: 3500, // 轮播图自动播放间隔
        durationNew: 700, // 轮播图自动播放时长
        parameter: {
            'navbar': '0',
            'return': '0',
            'class': '5'
        },
        window: false, // 是否显示优惠券窗口
        iShiddenTip: false, // 是否显示提示
        isAuto: true, // 是否自动授权；
        iShidden: true, // 是否隐藏；
        isGoIndex: false, // 是否返回首页；
        recommend: {
            loadend: false, // 已全部加载
            loading: false, // 正在加载
            loadTitle: '加载更多',
            page: 1,
            limit: 20,
        },
        /// 以下为拉洋片算法参数
        navH: 0, // 标题栏高度
        navPxH: 0, //
        rowHeight: HEIGHT_OF_ROW,
        rowPxHeight: HEIGHT_OF_ROW,
        rowProdNum: ITEM_NUM_OF_ROW,
        rowCacheNum: 5, // 拉洋片缓冲商品: 3 行
        ///
        activeTabIndex: 0,
        countDownHour: "00",
        countDownMinute: "00",
        countDownSecond: "00",
        seckillCont: true, //@deprecated 
        interval: null,
        timerNotification: null,
        newGoodsBananr: '', //@deprecated
        cpnMine: null, // 挖礦組件
        liveList: [], // 直播列表
        liveInfo: {}
    },

    // 关闭提示添加到小程序窗口
    closeTip: function () {
        wx.setStorageSync('msg_key', true);
        this.setData({
            iShiddenTip: true
        })
    },

    // 挖矿组件绑定
    onNeedLogin: function () {
        this.setData({
            iShidden: false
        })
    },

    /**
     * 生命周期函数--监听页面加载
     */
    onLoad: function (options) {
        // 由分享链接跳转过来
        // a === 'share'
        // id 商品ID
        // spid spread_id
        if (options.a && options.a == 'share' && options.id && options.spid) {
            wx.navigateTo({
                url: '/pages/goods_details/index?id=' + options.id + '&spid=' + options.spid,
            })
        }
        // 获取 nav 高度等信息
        let query = wx.createSelectorQuery()
        query.select('.indexs').boundingClientRect((rect) => {
            let width = rect.width
            let ratio = 750 / width // px -> rpx 需要乘以的数
            this.setData({
                rowPxHeight: Math.floor(this.data.rowHeight / ratio),
                navH: app.globalData.navHeight,
                navPxH: Math.floor(app.globalData.navHeight / ratio),
            })
            d.debug('width:', width, 'ratio:', ratio)
            d.debug('rowHeight:', this.data.rowPxHeight, 'navH:', this.data.navH, 'navPxH:', this.data.navPxH)
        }).exec()

        wxh.selfLocation(1);
        this.getCategoryData();
        // this.getCoupon();
        this.get_hot_product();
        // this.get_product_list();
        if (options.spid) {
            app.globalData.spid = options.spid;
        }
        if (options.scene) {
            app.globalData.code = decodeURIComponent(options.scene);
        }
        if (wx.getStorageSync('msg_key')) {
            this.setData({
                iShiddenTip: true
            });
        }
        this.getTemlIds();
        this.getLiveList();
    },

    getTemlIds() {
        let messageTmplIds = wx.getStorageSync(CACHE_SUBSCRIBE_MESSAGE);
        if (!messageTmplIds) {
            getTemlIds().then(res => {
                if (res.data) {
                    wx.setStorageSync(CACHE_SUBSCRIBE_MESSAGE, JSON.stringify(res.data));
                }
            }).catch(err => {
                d.error('err:', err)
            })
        }
    },

    //授权
    onLoadFun: function () {
        // 挖矿组件认证回调
        if (this.data.cpnMine != null) {
            this.data.cpnMine.onLoadFun();
        }
    },

    catchTouchMove: function (res) {
        return false
    },

    /** 关闭优惠券窗口 */
    onClose: function () {
        this.setData({
            window: false
        });
    },

    /**
     * 生命周期函数--监听页面初次渲染完成
     */
    onReady: function () {},

    /** 
     * 轮播监听 
     */
    bindchange(e) {
        var index = e.detail.current;
        this.setData({
            avtiveIndex: index
        });
    },

    /**
     * 生命周期函数--监听页面显示
     */
    onShow: function () {
        // this.getCoupon();
        this.getIndexConfig();
        // this.getSeckillTime();

        var that = this
        this.setData({
            timerNotification: setInterval(function () {
                that.loadNotifications()
            }, 1000 * 60 * 3)
        })
        app.updateUnread()
    },

    // 加载通知，目前只有跑马灯
    loadNotifications: function () {
        var that = this
        getNotifications().then(res => {
            if (res.data.carousel.length > 0) {
                that.setData({
                    itemNew: res.data.carousel
                })
            }
        })
    },

    getIndexConfig: function () {
        var that = this;
        getIndexData().then(res => {
            that.setData({
                banner: res.data.banner,
                menus: res.data.menus,
                activity: res.data.activity,
                lovely: res.data.lovely,
                info: res.data.info,
                itemNew: res.data.roll,
                likeInfo: res.data.likeInfo,
                benefit: res.data.benefit,
                logoUrl: res.data.logoUrl,
                couponList: res.data.couponList,
            });

            app.setUnread(res.data.notice);
        })
    },

    getLiveList: function () {
        let that = this
        getLiveList(1, 20).then(res => {
            if (res.data.length == 1) {
                that.setData({
                    liveInfo: res.data[0]
                });
            } else {
                that.setData({
                    liveList: res.data
                });
            }
        }).catch(err => {
            d.error('error:', err)
        })
    },

    /**
     * 商品详情跳转 商品点击事件
     */
    goDetailType: function (e) {
        let item = e.currentTarget.dataset.items
        if (item.activity && item.activity.type === "1") {
            wx.navigateTo({
                url: `/pages/activity/goods_seckill_details/index?id=${item.activity.id}&time=${item.activity.time}&status=1`
            });
        } else if (item.activity && item.activity.type === "2") {
            wx.navigateTo({
                url: `/pages/activity/goods_bargain_details/index?id=${item.activity.id}`
            });
        } else if (item.activity && item.activity.type === "3") {
            wx.navigateTo({
                url: `/pages/activity/goods_combination_details/index?id=${item.activity.id}`
            });
        } else {
            wx.navigateTo({
                url: `/pages/goods_details/index?id=${item.id}`
            });
        }
    },

    /**
     * 获取我的推荐
     */
    get_hot_product: function (isReload) {
        if (this.data.recommend.loadend) return;
        if (this.data.recommend.loading) return;

        if (isReload) {
            this.setData({
                'recommend.page': 1,
                hotProducts: []
            });
        }
        this.setData({
            'recommend.loading': true,
            'recommend.loadTitle': ''
        });

        let that = this;
        getProductHot(this.data.recommend.page, this.data.recommend.limit).then(res => {
            let list = res.data;
            let hotProducts = app.SplitArray(list, that.data.hotProducts);
            let loadend = list.length < that.data.recommend.limit;
            that.setData({
                'recommend.loadend': loadend,
                'recommend.loading': false,
                'recommend.loadTitle': loadend ? '已全部加载' : '加载更多',
                hotProducts: hotProducts,
                ['recommend.page']: that.data.recommend.page + 1,
            });
        }).catch(err => {
            that.setData({
                'recommend.loading': false,
                'recommend.loadTitle': '加载更多'
            });
        });
    },

    /** 点击上方活动标签按钮 */
    onTapCategoryTabItem: function (event) {
        let tabIndex = event.detail.index;
        d.debug('this.data.prodCates.children.length:', this.data.prodCates.children.length, 'current tab index:', tabIndex)
        // 不能过界 0 是主场，不包含在 prodCates 内, 
        // 主场不处理
        if (tabIndex <= 0 || tabIndex > this.data.prodCates.children.length) {
            d.debug('tab index out of range:', tabIndex)
            this.setData({
                activeTabIndex: tabIndex
            })
            return
        }

        if (this.data.prodCates.children[tabIndex - 1].id === CATE_BLACKHOLE_ID) {
            // 黑洞
            let mine = null
            if (this.data.cpnMine == null) {
                mine = this.selectComponent('#mine')
            }
            this.setData({
                activeTabIndex: tabIndex,
                cpnMine: mine,
            })

            var _ = this.data.cpnMine && this.data.cpnMine.show()
            return
        }

        var _ = this.data.cpnMine && this.data.cpnMine.hide()

        this.setData({
            activeTabIndex: tabIndex
        })

        // 首屏
        if (this.data.prodCates.children[tabIndex - 1].page <= 1) {
            this.get_product_list(tabIndex);
        }
        wx.pageScrollTo({
            scrollTop: this.data.prodCates.children[tabIndex - 1].scrollPos
        })
    },

    // 获取商品列表
    // @tabIndex 活动标签 @isReload 是否重新加载
    get_product_list: function (tabIndex, isReload) {
        // 不处理主场和黑洞星球
        if (tabIndex <= 0 || tabIndex > this.data.prodCates.children.length) {
            d.debug('invalid tab index:', tabIndex)
            return
        }
        // 大类 ID
        let cid = this.data.prodCates.id
        // 子类
        let act = this.data.prodCates.children[tabIndex - 1]

        if (act.loading) return
        if (act.loaded && !isReload) return

        let cindex = tabIndex - 1 // tab index 转换到 数据的 index
        if (isReload) {
            this.setData({
                [`prodCates.children[${cindex}].page`]: 1,
                [`prodCates.children[${cindex}].products`]: [],
                [`prodCates.children[${cindex}].aboveShowRowIndex`]: 0,
                [`prodCates.children[${cindex}].belowShowRowNum`]: 0
            })
        }

        this.setData({
            [`prodCates.children[${cindex}].loading`]: true,
            [`prodCates.children[${cindex}].loadTitle`]: ''
        });

        var that = this;
        getProductslist({
            page: act.page,
            limit: PAGE_LIMIT,
            cid: cid,
            sid: act.id,
        }).then(res => {
            let list = [] // res.data
            // 过滤产品列表, 只保留本页用的字段
            let counter = act.products.length
            res.data.forEach((prod) => {
                counter += 1
                list.push({
                    id: prod.id,
                    image: prod.image,
                    activity: prod.activity,
                    store_name: prod.store_name,
                    price: prod.price,
                    vip_price: prod.vip_price,
                    sales: prod.sales,
                    isShow: (counter / 2 - act.aboveShowRowIndex) <= 2 * this.data.rowCacheNum, // 是否显示
                })
            })
            // console.log('list.length:', list.length, 'res.data.length:', res.data.length)
            let products = app.SplitArray(list, act.products)
            let loaded = list.length < PAGE_LIMIT
            that.setData({
                [`prodCates.children[${cindex}].loaded`]: loaded,
                [`prodCates.children[${cindex}].loading`]: false,
                [`prodCates.children[${cindex}].loadTitle`]: loaded ? '已全部加载' : '加载更多',
                [`prodCates.children[${cindex}].products`]: products,
                [`prodCates.children[${cindex}].page`]: act.page + 1
            });
        }).catch(err => {
            d.error(err)
            that.setData({
                [`prodCates.children[${cindex}].loading`]: false,
                [`prodCates.children[${cindex}].loadTitle`]: '加载更多'
            });
        });
    },

    // getSeckillTime: function () {
    //   let that = this;
    //   getSeckillIndexTime().then(res => {
    //     let timeList = res.data.seckillTime, seckillTimeIndex = res.data.seckillTimeIndex;
    //     that.setData({
    //       timeList: timeList,
    //       seckillCont: res.data.seckillCont,
    //       killIndex: seckillTimeIndex,
    //       seckillTimeIndex: seckillTimeIndex,
    //       killIndexTime: timeList[that.data.killIndex].stop,
    //       status: timeList[seckillTimeIndex].status
    //     })
    //     wxh.time(timeList[that.data.killIndex].stop, that,false);
    //     that.getSeckillLists(); 
    //   }).catch(()=>{

    //   });
    // },

    // 页面事件， 不再使用
    // setTime: function (e) {
    //     let index = e.currentTarget.dataset.index;
    //     this.setData({
    //         killIndex: index,
    //         status: that.data.timeList[index].status
    //     })
    //     // that.getSeckillLists();
    // },

    // 不再触发
    // getSeckillLists: function () {
    //     let that = this;
    //     let timeId = that.data.timeList[that.data.killIndex].id;
    //     getSeckillList(timeId, {
    //         page: 1,
    //         limit: 20
    //     }).then(res => {
    //         that.setData({
    //             seckillList: res.data
    //         })

    //         if (this.data.timeList.length) {
    //             let query = wx.createSelectorQuery().in(this);
    //             query.select('.timeLen').boundingClientRect(function (res) {
    //                 if (res) {
    //                     that.setData({
    //                         scrollLeft: (that.data.killIndex - 1.8) * res.width
    //                     });
    //                 }
    //             }).exec();
    //             if (that.data.killIndex === that.data.seckillTimeIndex) {
    //                 that.setData({
    //                     killIndexLen: res.data.length
    //                 })
    //             }
    //         }
    //     }).catch(() => {});
    // },

    // 获取分类列表 
    getCategoryData: function () {
        let that = this;
        getCategoryList().then(res => {

            let cates = res.data.length > 0 ? res.data[0] : {}
            that.setData({
                prodCates: that._rebuildProdCates(cates)
            })
            d.debug(this.data.prodCates)
        });
    },

    // 整理 this.data.prodCates
    _rebuildProdCates: function (cates) {
        cates.children.forEach(cate => {
            // 不处理黑洞星球
            if (cate.id == CATE_BLACKHOLE_ID) {
                return
            }
            // 增加属性
            cate.loading = false
            cate.loaded = false
            cate.loadTitle = '加载更多'
            cate.products = []
            cate.page = 1 // 当前第几页
            cate.scrollPos = 0 // 上次滚动条位置
            cate.aboveShowRowIndex = 0 // 可见区域上部行索引
            cate.belowShowRowNum = 0 // 底部隐藏行数
        })
        return cates;
    },

    /** 获取优惠券列表 不再触发*/
    // getCoupon: function () {
    //     var that = this;
    //     getCoupons({
    //         page: 1,
    //         limit: 6
    //     }).then(res => {
    //         that.setData({
    //             getCouponList: res.data
    //         })
    //     }).catch(err => {
    //         // app.Tips({
    //         //   title: err
    //         // });
    //     });
    // },

    // 页面回调，不再触发
    // receiveCoupon: function (e) {
    //     if (!app.globalData.isLog) {
    //         this.setData({
    //             iShidden: false
    //         });
    //     } else {
    //         var that = this;
    //         var list = that.data.getCouponList;
    //         var index = e.currentTarget.dataset.index;
    //         var id = that.data.getCouponList[index].id;
    //         getCouponReceive({
    //                 couponId: id
    //             })
    //             .then(function () {
    //                 list[index].is_use = true;
    //                 that.setData({
    //                     getCouponList: that.data.getCouponList
    //                 })
    //                 app.Tips({
    //                     title: "领取成功"
    //                 });
    //             })
    //             .catch(function (err) {
    //                 // app.Tips({
    //                 //   title: err
    //                 // });
    //             });
    //     }
    // },

    /**
     * 生命周期函数--监听页面隐藏
     */
    onHide: function () {
        this.setData({
            window: false
        });
        this.data.interval !== null && clearInterval(this.data.interval);
        if (this.data.timerNotification != null) {
            clearInterval(this.data.timerNotification);
            this.setData({
                timerNotification: null,
            })
        }

        var _ = this.data.cpnMine && this.data.cpnMine.hide()
    },

    /**
     * 生命周期函数--监听页面卸载
     */
    onUnload: function () {
        this.data.interval !== null && clearInterval(this.data.interval);
    },

    /**
     * 页面相关事件处理函数--监听用户下拉动作
     */
    onPullDownRefresh: function () {
        let tabIndex = this.data.activeTabIndex
        // 主场刷新
        // 其他场刷新
        if (tabIndex == 0) {
            this.getIndexConfig();
        } else if (tabIndex > this.data.prodCates.children.length) {
            d.error('invalid tab index:', tabIndex)
        } else {
            if (!this.data.prodCates.children[tabIndex - 1].id == CATE_BLACKHOLE_ID) {
                this.get_product_list(tabIndex, true)
            }
        }
        this.get_hot_product(true)
        wx.stopPullDownRefresh();
    },

    /**
     * 页面上拉触底事件的处理函数
     */
    onReachBottom: function () {
        let tabIndex = this.data.activeTabIndex
        // 主场只加载热门
        // 其他场加载商品列表
        if (tabIndex == 0) {
            this.get_hot_product();
        } else if (tabIndex > 0 &&
            tabIndex <= this.data.prodCates.children.length &&
            this.data.prodCates.children[tabIndex - 1].id != CATE_BLACKHOLE_ID) {
            this.get_product_list(this.data.activeTabIndex);
            if (this.data.prodCates.children[tabIndex - 1].loadend) {
                this.get_hot_product();
            }
        }
    },

    onPageScroll: throttle(function (obj) {
        let tabIndex = this.data.activeTabIndex
        if (tabIndex <= 0 ||
            tabIndex > this.data.prodCates.children.length ||
            this.data.prodCates.children[tabIndex - 1].id == CATE_BLACKHOLE_ID) {
            d.debug('ignore tab scroll event. tab index:', tabIndex)
            return
        }

        let pos = obj[0].scrollTop //
        let calcPos = pos //- this.data.navPxH
        calcPos = calcPos > 0 ? calcPos : 0
        let rowNum = Math.floor(calcPos / this.data.rowPxHeight) // 滚动过去的总行数, 也是当前 viewport 的开始索引位置
        let clearRowNum = rowNum - this.data.rowCacheNum // 隐藏总行数

        let cindex = tabIndex - 1
        let tabData = this.data.prodCates.children[cindex]
        let changingData = {}
        if (pos - tabData.scrollPos > 0) { // 向下
            // d.debug('DOWN pos:', pos, 'rowPxHeight', this.data.rowPxHeight,
            //     'rowNum:', rowNum, 'clearRowNum:', clearRowNum, 'aboveShowRowIndex:', tabData.aboveShowRowIndex)
            if (clearRowNum > 0) {
                // aboveShowRowIndex 索引的行之前都不显示
                for (let i = tabData.aboveShowRowIndex; i < clearRowNum; i++) {
                    let leftIndex = i * 2
                    changingData[[`prodCates.children[${cindex}].products[${leftIndex}].isShow`]] = false
                    changingData[[`prodCates.children[${cindex}].products[${leftIndex + 1}].isShow`]] = false
                    let belowShowRowIndex = i + 2 * this.data.rowCacheNum
                    if (belowShowRowIndex < Math.floor(tabData.products.length / 2)) {
                        leftIndex = belowShowRowIndex * 2
                        changingData[[`prodCates.children[${cindex}].products[${leftIndex}].isShow`]] = true
                        changingData[[`prodCates.children[${cindex}].products[${leftIndex + 1}].isShow`]] = true
                    }
                }
            }
        } else { // 向上
            // d.debug('UP pos:', pos, 'rowPxHeight', this.data.rowPxHeight,
            //     'rowNum:', rowNum, 'clearRowNum:', clearRowNum, 'aboveShowRowIndex:', tabData.aboveShowRowIndex)
            if (clearRowNum >= 0) {
                for (let i = tabData.aboveShowRowIndex - 1; i >= clearRowNum; i--) {
                    let leftIndex = i * 2
                    changingData[[`prodCates.children[${cindex}].products[${leftIndex}].isShow`]] = true
                    changingData[[`prodCates.children[${cindex}].products[${leftIndex + 1}].isShow`]] = true
                    let belowShowRowIndex = i + 2 * this.data.rowCacheNum
                    if (belowShowRowIndex < tabData.products.length / 2) {
                        leftIndex = belowShowRowIndex * 2
                        changingData[[`prodCates.children[${cindex}].products[${leftIndex}].isShow`]] = false
                        changingData[[`prodCates.children[${cindex}].products[${leftIndex + 1}].isShow`]] = false
                    }
                }
            } else {
                if (tabData.aboveShowRowIndex > 0) {
                    for (let i = 0; i < tabData.aboveShowRowIndex; i++) {
                        this.setData({
                            [`prodCates.children[${cindex}].products[${i * 2}].isShow`]: true,
                            [`prodCates.children[${cindex}].products[${i * 2 + 1}].isShow`]: true,
                        })
                        // changingData[[`prodCates.children[${cindex}].products[${i * 2}].isShow`]] = true
                        // changingData[[`prodCates.children[${cindex}].products[${i * 2 + 1}].isShow`]] = true
                    }
                }
            }
        } //
        clearRowNum = clearRowNum > 0 ? clearRowNum : 0;
        if (clearRowNum >= 0 &&
            !(clearRowNum > 0 && clearRowNum == tabData.aboveShowRowIndex)) {
            changingData[[`prodCates.children[${cindex}].aboveShowRowIndex`]] = clearRowNum

            let belowShowRowNum = tabData.products.length / 2 - (2 * this.data.rowCacheNum + clearRowNum)
            belowShowRowNum = belowShowRowNum > 0 ? belowShowRowNum : 0
            // console.log('belowShowRowNum:', belowShowRowNum, 'tabData.products.length:', tabData.products.length, 'clearRowNum:', clearRowNum)
            if (belowShowRowNum >= 0) {
                changingData[[`prodCates.children[${cindex}].belowShowRowNum`]] = belowShowRowNum

                // for (let i = 0; i < belowShowRowNum; i++) {
                //     let leftIndex = (tabData.products.length / 2 - i - 1) * 2;
                //     changingData[[`prodCates.children[${cindex}].products[${leftIndex}].isShow`]] = false
                //     changingData[[`prodCates.children[${cindex}].products[${leftIndex + 1}].isShow`]] = false
                // }
            }
            this.setData(changingData)
        }

        if (cindex >= 0 && cindex < this.data.prodCates.children.length) {
            this.setData({
                ['prodCates.children[' + cindex + '].scrollPos']: pos
            })
        }
        // this._debugProducts()
    }),

    _debugProducts: function () {
        let all = [],
            display = [],
            tabIndex = this.data.activeTabIndex
        if (tabIndex <= 0 || tabIndex > this.data.prodCates.children.length) {
            return
        }
        let tabData = this.data.prodCates.children[tabIndex - 1]
        for (let i = 0; i < tabData.products.length; i++) {
            if (tabData.products[i].isShow) {
                display.push(i)
            }
            all.push(i)
        }
        d.debug('all:', all)
        d.debug('display:', display)
    },

    /**
     * 用户点击右上角分享
     */
    onShareAppMessage: function () {

    }
})

function throttle(fn) {
    let valid = true

    return function () {
        if (!valid) {
            return false
        }

        valid = false
        return setTimeout(() => {
            fn.call(this, arguments)
            valid = true
        }, THROTTLE_TIME)
    }
}