utils.js

const dayTime = 1000 * 60 * 60 * 24 //1天；
const hourTime = 1000 * 60 * 60;
const minuteTime = 1000 * 60;
const secondTime = 1000;
const vnum = 2554477;

const setRandomValue = (integerNum, decimalNum) => {

  let randomNum = Math.random() * Math.pow(10, integerNum) + Math.pow(10, integerNum);
  // 整数部分
  let integerPart = 0;
  if (integerNum) {
    integerPart = Math.floor(randomNum);
  }
  //  小数部分
  let decimalPart = 0.00;
  if (decimalNum) {
    decimalPart = randomNum.toString().split(".")[1].substring(0, decimalNum);
    decimalPart = '0.' + decimalPart;
    decimalPart = parseFloat(decimalPart);
  }
  return integerPart + decimalPart;
}
/**
 * 
 * @param {*长度} length 
 * @param {*从第几位开始} startLength 
 */
let setRandomData = (params) => {

  let { step, length, type, increasingNum, startTime, endTime } = params;
  let t = [];
  let c = [];
  let o = [];
  let h = [];
  let l = [];
  let v = [];
  let s = "ok";
  let num = "";
  let time = ""
  for (let i = 0; i < length; i++) {
    num = setRandomValue(2, 2);
    h.push(num);
    l.push(num - setRandomValue(1));
    o.push(num - setRandomValue(1));
    c.push(num - setRandomValue(1));
    v.push(vnum - setRandomValue(6));

    if (type === "front") {
      time = Math.floor((endTime - step * (i + 1)) / 1000);
      t.unshift(time);
    } else if (type === "back") {
      time = Math.floor((endTime + step * (increasingNum + i + 1)) / 1000);
      // time = Math.floor(new Date().getTime() / 1000);//最新时间
      t.push(time);
    }

  }

  return {
    t,
    c,
    o,
    h,
    l,
    v,
    s
  }
}

const filteringTime = (time) => {
  let minuteTime = 60;
  let dayTime = 60 * 60 * 24;
  let longTime = 0;
  switch (time) {
    case "1D":
      longTime = dayTime * 1;
      break;
    default:
      longTime = parseInt(time) * minuteTime;
      break;
  }
  return longTime;
}


const transformTime = (time) => {
  let number = 0;
  if (time.indexOf('min') !== -1) {
    number = parseInt(time.split('min')[0]);
    return number * minuteTime
  }

  if (time.indexOf('hour') !== -1) {
    number = parseInt(time.split('hour')[0]);
    return number * hourTime
  }

  if (time.indexOf('D') !== -1) {
    number = parseInt(time.split('D')[0]);
    return number * dayTime
  }

  if (time.indexOf('W') !== -1) {
    number = parseInt(time.split('W')[0]);
    return number * dayTime * 7
  }

  if (time.indexOf('M') !== -1) {
    number = parseInt(time.split('W')[0]);
    return number * dayTime * 30
  }
}


module.exports = {
  setRandomValue,
  setRandomData,
  filteringTime,
  transformTime
}