Multiplatform library simplifies state management and effect handling using features like data classes and sealed classes. Supports platform-specific implementations, enabling seamless integration in Android applications.
Keemun is multiplatform Tea library.
Add the library to your build.gradle.kts file.
implementation("family.amma:keemun:1.3.0")
data class State(
val user: User?
)
sealed class Msg {
data class UserWasLoaded(val user: User) : Msg()
}
sealed class Effect {
object LoadUser : Effect()
}
FeatureParams:data class ViewState(
// Example
// English - "Age: 30"
// Russian - "Возраст: 30"
// etc
val localizedAge: String?
)
// StateTransform<State, ViewState> = suspend (State) -> ViewState
private fun stateTransform(getContext: () -> Context) = StateTransform<State, ViewState> { state ->
ViewState(
localizedAge = state.user?.age?.let { getContext().getString(R.string.age, it) }
)
}
class SomeFragment(featureParams: () -> SomeFeatureParams) : Fragment(R.layout.fragment_some) {
private val feature by androidConnectors(featureParams, getStateTransform = { stateTransform(::requireContext) })
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
.onViewCreated(view, savedInstanceState)
feature.render() { viewState ->
ageTextView.text = viewState.localizedAge
}
}
}
feature dispatch Msg.Foo
feature syncDispatch Msg.Bar
Surfaced from shared tags and platforms — no rankings paid for.
typealias SomeFeatureParams = FeatureParams<State, Msg, Effect>
typealias SomeFeatureEffectHandler = EffectHandler<Effect, Msg>
internal fun someFeatureParams(effectHandler: SomeFeatureEffectHandler): SomeFeatureParams =
FeatureParams(
init = init,
update = updater,
effectHandler = effectHandler
)
val init = InitFeature<State, Effect> { previous ->
val state = previous ?: State(user = null)
state to setOf(Effect.LoadUser)
}
val updater = Update<State, Msg> { msg, state ->
when (msg) {
is Msg.UserWasLoaded -> state.copy(user = msg.user) to emptySet()
}
}
fun effectHandler(repo: UserRepository) = SomeFeatureEffectHandler { effect, dispatch ->
when (effect) {
Effect.LoadUser -> {
val user = repo.loadUser()
dispatch(Msg.UserWasLoaded(user))
}
}
}