akkoma-fe/src/services/fetcher/fetcher.js

// makeFetcher - replacement for setInterval for fetching, starts counting
// the interval only after a request is done instead of immediately.
// - promiseCall is a function that returns a promise, it's called the first
// time after the first interval.
// - interval is the interval delay in ms.

export const makeFetcher = (promiseCall, interval) => {
  let stopped = false
  let timeout = null
  let func = () => {}

  func = () => {
    promiseCall().finally(() => {
      if (stopped) return
      timeout = window.setTimeout(func, interval)
    })
  }

  const stopFetcher = () => {
    stopped = true
    window.clearTimeout(timeout)
  }

  timeout = window.setTimeout(func, interval)

  return stopFetcher
}