SummaryItem.kt

sealed class SummaryItem : IdEntity<Long> {
    companion object {
        fun wrap(meta: TransactionMeta): SummaryItem =
                if (meta.transaction.isInvoiceItem())
                    SummaryInvoice(meta) else SummaryPayment(meta)
    }
}

fun Transaction.isInvoiceItem() = isMyInvoice() or isMyRequest()

fun Transaction.isMyInvoice() = // request sent to me by other
        type == Transaction.Type.RECEIVED
                && status == Transaction.Status.NEW
                && castAs == Transaction.CastAs.INVOICE

fun Transaction.isMyRequest() = // request sent by me to other
        type == Transaction.Type.SENT
                && status == Transaction.Status.NEW
                && castAs == Transaction.CastAs.INVOICE


data class SummaryInvoice(
        val meta: TransactionMeta,
        val approveProgress: Boolean = false,
        val declineProgress: Boolean = false
) : SummaryItem(), IdEntity<Long> by meta

data class SummaryPayment(
        val meta: TransactionMeta
) : SummaryItem(), IdEntity<Long> by meta