class Paginator<T>(private val items: MutableList<T>, limit: Int = 4) {
    private val TOTAL_NUM_ITEMS = items.size
    private val ITEMS_PER_PAGE = limit
    var currentPage: Int = 0

     fun getTotalPages() : Int{
        val remainingItems = TOTAL_NUM_ITEMS % ITEMS_PER_PAGE
        return if (remainingItems == 0) TOTAL_NUM_ITEMS / ITEMS_PER_PAGE
        else Math.round(((TOTAL_NUM_ITEMS / ITEMS_PER_PAGE) + 1).toDouble()).toInt()
    }

    fun getCurrentItems(currentPage: Int): ArrayList<T>? {
      val startItem = if (currentPage == 0){0}
      else currentPage * ITEMS_PER_PAGE

        val lastItem = if (currentPage == 0){4} else startItem + ITEMS_PER_PAGE

        val currentItems: ArrayList<T> = ArrayList()
        return try {
            items.forEachIndexed { index, T ->
                if (index in startItem..(lastItem - 1))
                    currentItems.add(T)
            }
            this.currentPage++
            currentItems
        } catch (e: Exception) {
            e.printStackTrace()
            null
        }
    }
}