/**
 * 工具类
 */
class Util {

  static parseDate(date){
    var time = date==null?"": Date.parse(date.replace(/-/g, '/'));
    return new Date(time);
  }

  static formatTime(date) {
    let year = date.getFullYear();
    let month = date.getMonth() + 1;
    let day = date.getDate();

    let hour = date.getHours();
    let minute = date.getMinutes();
    let second = date.getSeconds();


    return [year, month, day].map(this.formatNumber).join('/') + ' ' + [hour, minute, second].map(this.formatNumber).join(':');
  };
  static formatNumber(n) {
    n = n.toString();
    return n[1] ? n : '0' + n;
  };
  static distance = (la1, lo1, la2, lo2) => {
    var La1 = la1 * Math.PI / 180.0;
    var La2 = la2 * Math.PI / 180.0;
    var La3 = La1 - La2;
    var Lb3 = lo1 * Math.PI / 180.0 - lo2 * Math.PI / 180.0;
    var s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(La3 / 2), 2) + Math.cos(La1) * Math.cos(La2) * Math.pow(Math.sin(Lb3 / 2), 2)));
    s = s * 6378.137; //地球半径
    s = Math.round(s * 1000) / 1000;
    // console.log("计算结果",s)
    return s
  }
};

module.exports = Util;