BS 集約の状態更新

BalanceSheet.scala

object BalanceSheet extends DomainModel[BalanceSheet, BsEvent, BsRejection] {

  override def initial: BalanceSheet = NotReady

  override def transition
      : BsEvent => BalanceSheet => ValidatedNec[BsRejection, BalanceSheet] = {
    case Initialized(as, ls) => _ => Ready(as, ls).validNec
    case Journalized(e) =>
      _.mustBeReady.map { bs =>
        bs.copy(
          assets = ???, // 新しい資産一覧を計算
          liabilities = ??? // 新しい負債一覧を計算
        )
      }
  }