dating-cards-promote-all.kt

internal class PromoteAll<T : Any> : CardsOperation<T> {

    override fun invoke(elements: CardsElements<T>): CardsElements<T> =
        elements.map {
            it.transitionTo(
                // This uses State.next() we defined earlier:
                newTargetState = it.targetState.next(),
                operation = this
            )
        }
}

internal fun <T : Any> Cards<T>.promoteAll() {
    accept(PromoteAll())
}