dating-cards-vote-like.kt

class VoteLike<T : Any> internal constructor() : CardsOperation<T> {

    // Returns a modified list of elements with new target states applied
    override fun invoke(elements: CardsElements<T>): CardsElements<T> =
        elements.map { element ->
            if (element.targetState == Cards.State.Top) {
                element.transitionTo(
                    newTargetState = Cards.State.VoteLike,
                    operation = this
                )
            } else {
                element
            }
        }
}

fun <T : Any> Cards<T>.voteLike() {
    accept(VoteLike())
    promoteAll()
}