frontend/src/utils.js

/* 去重 */
export function deWeightThree(data, key) {
  let map = new Map();
  for (let item of data) {
    if (!map.has(item[key])) {
      map.set(item[key], item);
    }
  }
  return [...map.values()];
}

/* uuid生成器 */
export function uuid(len, radix) {
  var chars =
    "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz".split("");
  var uuid = [],
    i;
  radix = radix || chars.length;

  if (len) {
    // Compact form
    for (i = 0; i < len; i++) uuid[i] = chars[0 | (Math.random() * radix)];
  } else {
    // rfc4122, version 4 form
    var r;

    // rfc4122 requires these characters
    uuid[8] = uuid[13] = uuid[18] = uuid[23] = "-";
    uuid[14] = "4";

    // Fill in random data.  At i==19 set the high bits of clock sequence as
    // per rfc4122, sec. 4.1.5
    for (i = 0; i < 36; i++) {
      if (!uuid[i]) {
        r = 0 | (Math.random() * 16);
        uuid[i] = chars[i == 19 ? (r & 0x3) | 0x8 : r];
      }
    }
  }

  return uuid.join("");
}

//计算两个时间差  返回天
export function timeDiff(begin_time, end_time) {
  //年月日时分秒转换为时间戳
  let beginTime = new Date(begin_time).getTime() / 1000;
  let endTime = new Date(end_time).getTime() / 1000;
  var starttime = "";
  var endtime = "";
  if (beginTime < endTime) {
    starttime = beginTime;
    endtime = endTime;
  } else {
    starttime = endTime;
    endtime = beginTime;
  }
  //计算天数
  var timediff = endtime - starttime;
  var days = parseInt(timediff / 86400);
  //计算小时数
  var remain = timediff % 86400;
  var hours = parseInt(remain / 3600);
  //计算分钟数
  var remain = remain % 3600;
  var mins = parseInt(remain / 60);
  var res = Number(days + 1);
  return res;
}

export function getNowTime() {
  var now = new Date();
  var year = now.getFullYear();
  var month =
    now.getMonth() + 1 <= 9 ? "0" + (now.getMonth() + 1) : now.getMonth() + 1;
  var day = now.getDate() <= 9 ? "0" + now.getDate() : now.getDate();
  var tt = now.getHours() <= 9 ? "0" + now.getHours() : now.getHours();
  var mm = now.getMinutes() <= 9 ? "0" + now.getMinutes() : now.getMinutes();
  var ss = now.getSeconds() <= 9 ? "0" + now.getSeconds() : now.getSeconds();
  let datelist = [year, month, day, tt, mm, ss];
  return datelist.join("");
}