requests.ts

const from = PAGE_SIZE * page
let accumulator = 0
let assigned = 0
let currentCityIndex = 0
let currentCityPage = 0
let pages: number[] = []
let results: Listing[] = []

while (assigned < PAGE_SIZE || currentCityIndex === CITIES.length - 1) {
  const response = await axios.get(
    URL_OTIS,
    defaultConfig(types, CITIES[currentCityIndex], currentCityPage + 1)
  )
  const mapped = response.data.results.map(mapOtisResult)
  const count = response.data.results.length
  const total = response.data.count

  if (from > total && results.length === 0) {
    pages[currentCityIndex] = total
    currentCityPage = 0
    currentCityIndex++
    accumulator += total
  } else {
    if (currentCityPage == 0) {
      pages[currentCityIndex] = total
    }
    const currentCityMaxPage = Math.ceil(
      pages[currentCityIndex] / PAGE_SIZE
    )
    if (currentCityPage === currentCityMaxPage) {
      currentCityPage = 0
      currentCityIndex++
    } else {
      currentCityPage++
    }

    if (accumulator >= from) {
      results.push(...mapped)
      assigned += count
    }
    accumulator += count
    if (currentCityPage === currentCityMaxPage) {
      currentCityIndex++
      currentCityPage = 0
    }
  }
}

const sliced = results.slice(0, PAGE_SIZE)
return sliced