custom akka-http directive for pagination

PagedRequest.scala

//request response model
case class PageRequest(page: Int, size: Int)

case class PageResponse[T](page: Int, size: Int, totalPages: Int, data: Seq[T])


//sample routes
private val routes = path("echo") {
    get {
      complete("hello world")
    }
  } ~
    path("customers") {
      get {
        complete(PageResponse[Customer](1, 10, 1, Util.randomCustomers()))
      }
    } ~
    path("request") {
      pagedRequest { pageRequest =>
        parameter('name.?) { name =>
          get {
            complete(
              s"""
                 |page = ${pageRequest.page}
                 |size = ${pageRequest.size}
                 |name = $name
             """.stripMargin)
          }
        }
      }
    }

//page directive
  def pagedRequest: Directive1[PageRequest] = {
    val pageAndSize = parameters(("page".as[Int].?, "size".as[Int].?))
    pageAndSize.tmap {
      case (Some(p), Some(s)) => PageRequest(p, s)
      case _ => PageRequest(1, 100)
    }
  }