oil-client-wechat/utils/pay.js

const app = getApp()
// var pay = require('../../utils/pay.js');
function operation(a, b, digits, op) {
  var o1 = toInteger(a)
  var o2 = toInteger(b)
  var n1 = o1.num
  var n2 = o2.num
  var t1 = o1.times
  var t2 = o2.times
  var max = t1 > t2 ? t1 : t2
  var result = null
  switch (op) {
    case 'add':
      if (t1 === t2) { // 两个小数位数相同
        result = n1 + n2
      } else if (t1 > t2) { // o1 小数位 大于 o2
        result = n1 + n2 * (t1 / t2)
      } else { // o1 小数位 小于 o2
        result = n1 * (t2 / t1) + n2
      }
      return result / max
    case 'subtract':
      if (t1 === t2) {
        result = n1 - n2
      } else if (t1 > t2) {
        result = n1 - n2 * (t1 / t2)
      } else {
        result = n1 * (t2 / t1) - n2
      }
      return result / max
    case 'multiply':
      result = (n1 * n2) / (t1 * t2)
      return result
    case 'divide':
      result = (n1 / n2) * (t2 / t1)
      return result
  }
}

function nullRes(a) {
  if (a == 'null') {
    a = "";
    return a;
  } else if (a == null) {
    a = "";
    return a;
  } else {
    return a;
  };
}

function toFixed(num, s) {
  var times = Math.pow(10, s)
  var des = num * times + 0.6
  des = parseInt(des, 10) / times
  return des + ''
}

/*
 * 将一个浮点数转成整数，返回整数和倍数。如 3.14 >> 314，倍数是 100
 * @param floatNum {number} 小数
 * @return {object}
 *   {times:100, num: 314}
 */
function toInteger(floatNum) {
  var ret = {
    times: 1,
    num: 0
  }
  if (isInteger(floatNum)) {
    ret.num = floatNum
    return ret
  }
  var strfi = floatNum + ''
  var dotPos = strfi.indexOf('.')
  var len = strfi.substr(dotPos + 1).length
  var times = Math.pow(10, len)
  var intNum = parseInt(floatNum * times + 0.5, 10)
  ret.times = times
  ret.num = intNum
  return ret
}
/** 判断obj是否为一个整数*/
function isInteger(obj) {
  return Math.floor(obj) === obj
}

function wxpay(phone, money, originalPrice, uuid, cooperationId, that, number) {
  wx.showLoading({
    title: '支付请求中....',
  });
  wx.request({
    url: app.globalData.devUrl + "/api/v1/wxpay/pay/pre/" + phone,
    header: {
      'content-type': 'application/x-www-form-urlencoded'
    },
    data: {
      phone: phone,
      // openId: wx.getStorageSync("weChatId"),
      // tradeType: "JSAPI",
      // type: 3,
      actualMoney: toFixed(operation(money, 100, 2, "multiply"), 2),
      totalMoney: toFixed(operation(originalPrice, 100, 2, "multiply"), 2),
      // uuid: uuid,
      cooperationId: cooperationId,
      number: number,
    },

    method: 'POST',
    success: function(res) {

      wx.hideLoading()
      if (res.data.code == 0) {
        // 发起支付
        var param = res.data.data;

        var outTradeNo = param.outTradeNo;

        wx.requestPayment({
          // appId: param.appid,
          timeStamp: param.timeStamp,
          nonceStr: param.nonceStr,
          package: param.package,
          signType: param.signType,
          paySign: param.paySign,
          fail: function(res) {

            that.setData({
              maskFlag: true,
            })
            wx.showToast({
              title: '支付取消'
            })
          },
          success: function() {
            that.setData({
              maskFlag: true,
            })
            payResult(cooperationId, outTradeNo);

          }
        })
      } else {

        wx.showModal({
          title: '提示',
          content: res.data.msg,
          showCancel: false,
        })
        that.setData({
          maskFlag: true,
        })


      }
    },
    error: function() {

      that.setData({
        maskFlag: true,
      })
      wx.showModal({
        title: '提示',
        content: res.data.msg,
        showCancel: false,
      })


    },
    fail: function(data) {
      wx.hideLoading()
      wx.showModal({
        title: '提示',
        content: '网络传输异常',
        showCancel: false,
      })
    }
  })
}


function payResult(cooperationId, outTradeNo) {
  wx.request({
    url: app.globalData.devUrl + "/api/v1/wxpay/pay/status",
    data: {
      cooperationId: cooperationId,
      outTradeNo: outTradeNo
    },
    method: 'GET',
    error: function(res) {
      console.log(res);
    },
    success: function(res) {
      if (res.data.code == 0) {
        wx.showModal({
          title: '提示',
          content: res.data.msg,
          showCancel: false,
          success: function() {
            findId()
            wx.navigateBack({
              delta: 1
            })
          }
        })
      } else {
        setInterval(payResult(orderNo), 1000);
      }
    }
  })
}

function throttle(fn, gapTime) {
  if (gapTime == null || gapTime == undefined) {
    gapTime = 1500
  }

  let _lastTime = null

  // 返回新的函数
  return function() {
    let _nowTime = +new Date()
    if (_nowTime - _lastTime > gapTime || !_lastTime) {
      fn.apply(this, arguments) //将this和参数传给原函数
      _lastTime = _nowTime
    }
  }
}

function findId() {
  var that = this;
  wx.request({
    url: app.globalData.devUrl + '/api/v1/user/detail/info/' + wx.getStorageSync("phone"),
    success: function(res) {
      if (res.data.code == 0) {
        wx.setStorageSync('id', res.data.data.name)
        wx.setStorageSync('number', res.data.data.number)
      }
    }
  })
}


module.exports = {
  wxpay: wxpay,
  payResult: payResult,
  isInteger: isInteger,
  toInteger: toInteger,
  toFixed: toFixed,
  nullRes: nullRes,
  operation: operation,
  throttle: throttle
}