private def daysToTuple(days: Seq[Byte]) : (Boolean, Boolean, Boolean, Boolean, Boolean, Boolean, Boolean) =
    days.foldLeft((false, false, false, false, false, false, false)){
      case (t, 1) => t.copy(_1 = true)
      case (t, 2) => t.copy(_2 = true)
      case (t, 3) => t.copy(_3 = true)
      case (t, 4) => t.copy(_4 = true)
      case (t, 5) => t.copy(_5 = true)
      case (t, 6) => t.copy(_6 = true)
      case (t, 7) => t.copy(_7 = true)
  }