Node script for writing fake server data

seed.js

const fs = require("fs");

// create a file writer that OVERWRITES the content of the text file
fs.writeFileSync("seed2.log", "")

function getRandomInt (max, skews = 1) {
  let result = max;

  for (let i = 0; i < skews; i++) {
    result = Math.random() * result;
  }

  return Math.floor(result);
}

function getRandomArrayItem (arr, skews) {
  const position = getRandomInt(arr.length, skews);

  return arr[position];
}

function wasteTime (data) {
  fs.appendFileSync("seed2.log", `${JSON.stringify(data)}\n`);
  return new Promise(resolve => setTimeout(resolve, 80));
}

var endpointArray = ["/index", "/cart", "/checkout", "/contact_us"];
var responseTypeArray = ["200", "404", "500"];
var isNow = false
var prevTime = (new Date('2021-02-17T03:24:00')).getTime()
var currentTime = (new Date).getTime();(prevTime > currentTime)

async function runner () {
  while (!isNow) {
    prevTime = (new Date(prevTime + getRandomInt(1000000, 4))).getTime()

    if (prevTime > currentTime) {
      isNow = true
    } else {
      const responseTime = getRandomInt(1000)

      // create new data object
      const data = {
        path: getRandomArrayItem(endpointArray, 2),
        received_timestamp: new Date(prevTime).toISOString(),
        response_timestamp: new Date(prevTime + responseTime).toISOString(),
        response_time: responseTime,
        response_code: getRandomArrayItem(responseTypeArray, 3),
      };

      // add the JSON as a row in the text file
      await wasteTime(data)
    }
  }
}

runner()