export function downloadFile({url}) {
  return new Promise((resolve, reject) => {
      wx.downloadFile({
          url,
          success: resolve,
          fail: reject
      });
  })
}

export function getQueryString(url, name) {
  let reg = new RegExp('(^|/?|&)' + name + '=([^&]*)(&|$)', 'i');
  let r = url.substr(1).match(reg);
  if (r != null) {
      return unescape(r[2]);
  }
  return null;
}

export function randomString(e) {
  for (var t = "", i = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789", n = 0; n < e; n++)
    t += i.charAt(Math.floor(Math.random() * i.length));
  return t
}

export function isPhoneX () {
  return new Promise((resolve) => {
      let screenHeight = wx.getSystemInfoSync().screenHeight
      let windowHeight = wx.getSystemInfoSync().windowHeight
      let bottom = wx.getSystemInfoSync().safeArea.bottom
      
      resolve(screenHeight != bottom || windowHeight > 750)
  })
}

// export function getLocation () {
//   return new Promise ( (resolve, reject) => {
//     wx.getLocation({
//       type: 'wgs84',
//       success: function (res) {
//           var latitude = res.latitude;
//           var longitude = res.longitude;
//           getApp().globalData.qqmapsdk.reverseGeocoder({
//               location: {
//                   latitude: latitude,
//                   longitude: longitude
//               },
//               success: function (res) {
//                   var ad_info = res.result.ad_info;
//                   let city = ad_info.city.replace('市', '');
//                   resolve(city)
//               },
//               fail:function (res) {
//                   wx.showModal({
//                       title: '定位失败',
//                   });
//               }
//           });
//       },
//       fail(err) {
//           wx.showModal({
//               title: '定位失败，请手动选择城市',
//           });
//       }
//   })
// })
// }