applet_nongchang/template/carts/index.js

const app = getApp();

Page({
  authdialog: null,
  product_ids: '',
  product_num: '',
  data: {
    isUseAddress: false,
    settlement: 0.00
  },
  onLoad: function (options) {
    var that = this;
    app.showLoading();
    //获取自定义授权组件
    that.authdialog = this.selectComponent("#authdialog");
    app.request('product.api.carts',{},{
      success: function(data, res){
        app.setList(that, data.carts);
        that.doSettlement();
        app.hideLoading();
      }
    });
  },

  /**
   * 删除订单
   */
  delOrder: function(e){
    var that = this;
    var pid;
    if (e == null && arguments.length==2){
      pid = arguments[1];
    }else{
      pid = app.getData(e).id;
    }
    var delfun = function(){
      app.request('product.api.delCarts',{
        product_id: pid
      },{
        success: function(data, res){
          app.toast('删除商品成功!');
          that.onLoad();
        },
        fail: function(res){
          app.toast('删除商品失败!');
        }
      });
    }
    wx.showModal({
      content: '确认删除该商品吗？',
      success: function(res){
        if (res.confirm){
          delfun();
        }
      }
    })
  },

  /**
   * 减少商品数量>0 and <=1
   */
  doSub: function(e){
    var id = app.getData(e).id;
    var list = this.data.list;
    for(var i=0; i<list.length; i++){
      if (list[i].product_id == id){
        //list[i].num = list[i].num-1<=0?1:list[i].num-1;
        if(list[i].num-1 <= 0){
          list[i].num = 1;
          this.delOrder(null, id);
        }else{
          list[i].num -= 1;
        }
        break;
      }
    }
    app.setList(this, list);
    this.doSettlement();
  },
  /**
   * 增加商品数量>1 and <=库存
   */
  doAdd: function(e){
    var id = app.getData(e).id;
    var list = this.data.list;
    for (var i = 0; i < list.length; i++) {
      if (list[i].product_id == id) {
        ++list[i].num;
        break;
      }
    }
    app.setList(this, list);
    this.doSettlement();
  },

  /**
   * 结算金额
   */
  doSettlement: function(){
    var list = this.data.list;
    var count=0;
    for(var i=0; i<list.length; i++){
      var product_id = list[i].product_id;
      var pay_price = list[i].product.pay_price;
      var num = list[i].num;
      count += pay_price*num;
      if(i==0){
        this.product_ids += product_id;
        this.product_num += num;
      }else{
        this.product_ids += ',' + product_id;
        this.product_num += ',' + num;
      }
    }
    app.set(this, 'settlement', count.toFixed(2));
  },

  /**
   * 立即支付
   */
  doPay: function(){
    var that = this;
    var addrObj = that.data.addrObj;
    if (!addrObj){
      app.toast('请选择收货地址');
    }
    app.request('product.api.buy',{
      product_id: that.product_ids,
      num: that.product_num,
      name: addrObj.userName,
      address: addrObj.provinceName + addrObj.cityName + addrObj.countyName + addrObj.detailInfo,
      mobile: addrObj.telNumber,
      invite_uid: app.getInviteUid()
    },{
      success:function(data, res){
        var pay = data.pay;
        wx.requestPayment({
          timeStamp: pay.time,
          nonceStr: pay.nonce_str,
          package: pay.prepay_id,
          signType: pay.sign_type,
          paySign: pay.sign,
          success: function(){//微信支付成功
            app.saveInviteUid('');
            var id = that.product_ids;
            let idx = id.indexOf(',');
            if (idx > -1) {
              id = id.substring(0, idx);
            }
            //跳转支付结果页
            app.redirect('pay/index?id=' + id);
          },
          fail: function(){//微信支付失败
            app.toast('支付失败！');
          }
        })
      },
      fail: function(res){
        app.toast('支付失败！');
      }
    })
  },

  /**
   * 使用微信地址
   */
  chooseAddress: function(event){
    var that = this;
    var success = function(){
      wx.chooseAddress({
        success: function (res) {
          app.set(that,'addrObj', res);
          app.set(that,'isUseAddress', true);
        }
      })
    }
    wx.getSetting({
      success: function(res){
        if (res.authSetting['scope.address']){
          success();
        }else{
          wx.authorize({
            scope: 'scope.address',
            success: function () {
              success();
            },
            fail: function(res){
              that.authdialog.showDialog();
            }
          })
        }
      }
    })
  }
})