uni

Unidirectional "Flow" architecture. Main intention of usage is for Android.

An example usage

data class Wiki(private val wikiService: WikiService) {

    data class State(val wikiResponse: WikiResponse? = null)
    sealed class Action {
        object FetchRandomWikiAction : Action()
        data class WikiResponseAction(val wikiResponse: WikiResponse) : Action()
    }
    
    fun getViewModel() =
        uniViewModelDSL<State, Action>(State()) {
            effect { flow ->
                flow
                    .filterIsInstance<Action.FetchRandomWikiAction>()
                    .flatMapLatest {
                        wikiService.getRandomWiki().map { Action.WikiResponseAction(it) }
                    }
            }

            reducer { action, state ->
                when (action) {
                    is Action.WikiResponseAction -> state.copy(wikiResponse = action.wikiResponse)
                    is Action.FetchRandomWikiAction -> state.copy(wikiResponse = null)
                }
            }
        }
}

Then in Compose, using whichever DI framework, in this case using Koins getViewModel we can do...

setContent {
    val vm = getViewModel<DslUnidirectionalViewModel<Wiki.State, Wiki.Action>>()
    val state by vm.liveDataState.observeAsState(initial = Wiki.State())

    WikiScreen(
        wikiResponse = state?.wikiResponse,
        onButtonTap = {
            vm.dispatch(Wiki.Action.FetchRandomWikiAction)
        }
    )
}

To use in your project:

implementation "com.ekeitho.uni:uni:$latest-version"

ekeitho/uni

uni