Counter

counter.js

function createCounter () {

  const hits = {}

  return {
    record,
    total
  }

  let lastRecordedBucket

  setInterval(function () {
    // delete
    
  }, 30 * 1000)



  function record (timestamp) {
    const key = getKey(timestamp)
    lastRecordedBucket = key
    hits[key] = hits[key] ? hits[key] + 1 : 1
  }

  function getKey (timestamp) {
    return (timestamp - timestamp % 60).toString()
  }

  function total (min, max) {
    return Object.entries(hits).reduce(function (acc, bucket) {
      const startTime = parseInt(bucket[0])
      const adjustedStartTime = startTime - (startTime % 60)


      if (adjustedStartTime >= min && adjustedStartTime + 60 <= max) {
        return acc + bucket[1]
      } else {
        return acc
      }
    }, 0)
  }
}

const myCounter = createCounter()
myCounter.record(200)
myCounter.record(2003)
myCounter.record(2004)
myCounter.record(3000)
myCounter.record(20001)
myCounter.record(2003)
console.log(myCounter.total(200, 3000))