period_domain.scala

case class Second(value: Long)
case class Minute(value: Long){
  def seconds = Second(value * 60)
}
case class Hour(value: Long) {
  def minutes = Minute(value * 60)
}
case class Day(value: Long){
  def hours = Hour(value * 24)
  def minutes = hours.minutes
  def seconds = minutes.seconds
}
case class Week(value: Long){
  def days = Day(value * 7)
  def hours = days.hours
  def minutes = hours.minutes
  def seconds = minutes.seconds
}
object Wrappers {
  class LongToPeriod(value: Long) {
    def days = Day(value)
    def minutes = Minute(value)
    def seconds = Second(value)
    def hours = Hour(value)
    def weeks = Week(value)
  }
  implicit def intToWrapper(value: Long): LongToPeriod = new LongToPeriod(value)
}

object TestPeriod {
  import Wrappers._

  def main(args: Array[String]): Unit = {
    println(Day(2).hours)
    println(6.hours.minutes)
    println(8.weeks.seconds)
  }
}