json-server/src/server/utils.js

module.exports = {
  getPage,
}

function getPage(array, page, perPage) {
  const obj = {}
  const start = (page - 1) * perPage
  const end = page * perPage

  obj.items = array.slice(start, end)
  if (obj.items.length === 0) {
    return obj
  }

  if (page > 1) {
    obj.prev = page - 1
  }

  if (end < array.length) {
    obj.next = page + 1
  }

  if (obj.items.length !== array.length) {
    obj.current = page
    obj.first = 1
    obj.last = Math.ceil(array.length / perPage)
  }

  return obj
}