slack_timestamp.scala

@json case class SlackTimestamp(value: String) extends Ordered[SlackTimestamp] { // channel-specific timestamp
  def compare(that: SlackTimestamp) = value compare that.value
  def toDateTime: DateTime = Try {
    // "The bit before the . is a unix timestamp, the bit after is a sequence to guarantee uniqueness."
    new DateTime(value.split('.').head.toLong * 1000)
  }.getOrElse(throw new Exception(s"Could not parse a date-time out of $value"))
}