com.pubnub.api.eventengine.State.kt Maven / Gradle / Ivy

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package com.pubnub.api.eventengine

internal interface State> {
    open fun onEntry(): Set = setOf()
    open fun onExit(): Set = setOf()
    abstract fun transition(event: Ev): Pair>
}

internal fun > S.noTransition(): Pair> = Pair(this, emptySet())
internal fun > S.transitionTo(
    state: S,
    vararg invocations: Ei
): Pair> {
    val effectInvocations = this.onExit() + invocations + state.onEntry()
    return Pair(state, effectInvocations)
}