automat-store-mini/pages/orderGoods/buy.js

const util = require('../../utils/util')
const app = getApp()
Page({

  /**
   * 页面的初始数据
   */
  data: {
    storeList:[],
    searchParams:{
      storeId:'',
      storeName:''
    },
    productList:[],
    totalPrice:0,
    sellProductList:[]

  },

  /**
   * 生命周期函数--监听页面加载
   */
  onLoad: function (options) {
    this.bindStoreList()
    this.bindProductStockList()

  },
  bindStoreList() {
    var that = this
    util.request(util.api.storeList, {}, "GET", false, true, app.globalData.token).then((res) => {
      if (res.code == 200) {
        that.setData({
          storeList: res.result
        })
      }
    }).catch((res) => {})
  },
  bindStorePickerChange: function (e) {
    var item = this.data.storeList[e.detail.value]
    console.log(item)
    this.setData({
      ['searchParams.storeId']: item.id,
      ['searchParams.storeName']: item.storeName
    })
    this.bindProductStockList()
  },
  changeNum: function (e) {
    this.setData({
      productNum: e.detail.value
    })
  },
  bindProductStockList() {
    var that = this
    util.request(util.api.productStockList, that.data.searchParams, "GET", false, true, app.globalData.token).then((res) => {
      if (res.code == 200) {
        res.result.forEach(item => {
          item.checkout = false
          item.productNum = 0
        });
        that.setData({
          productList: res.result
        })
      }
    }).catch((res) => {})
  },
  productNumChange(e){
    let that = this;
    let dataset = e.currentTarget.dataset;
    let value = e.detail.value;
    var list = that.data.productList
    var index = dataset.index;
    var itemProduct = dataset.item
    itemProduct.productNum = value
    list.splice(index,1,itemProduct)
    that.setData({
      productList:list
    })
    var list = this.data.productList.filter((e)=>e.checkout == true && e.productNum > 0)
    var totalPrice = 0
    list.forEach((e)=>{
      totalPrice += e.productPrice * e.productNum
    })
    this.setData({
      totalPrice: totalPrice,
      sellProductList: list
    })
  },
  checkboxChange(e){
    let that = this;
    let dataset = e.currentTarget.dataset;
    let value = e.detail.value;
    var list = that.data.productList
    var index = dataset.index;
    var itemProduct = dataset.item
    itemProduct.checkout = value.length>0? true : false
    list.splice(index,1,itemProduct)
    that.setData({
      productList:list
    })
    var list = this.data.productList.filter((e)=>e.checkout == true && e.productNum > 0)
    var totalPrice = 0
    list.forEach((e)=>{
      totalPrice += e.productPrice * e.productNum
    })
    this.setData({
      totalPrice: totalPrice,
      sellProductList: list
    })
  },
  btnPay(){
    if(this.data.sellProductList.length<1){
      util.toast('请选择下单商品，并且订货数量必须大于0')
      return
    }
    console.log("1111")
    console.log(this.data.sellProductList)
    console.log("2222")
    wx.navigateTo({
      
      url: '/pages/orderGoods/submitBuy?strJson='+encodeURIComponent(JSON.stringify(this.data.sellProductList))+'&storeId='+this.data.searchParams.storeId,
    })
  }
})