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Android ʹ͓͚Δ
ʊModel-View-Intentʊ
ΞʔΩςΫνϟ
Benoît Quenaudon @oldergod
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“What if the user was a function?” by Andre Staltz
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“What if the user was a function?” by Andre Staltz
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user()
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intent(user())
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model(intent(user()))
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view(model(intent(user())))
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user(view(model(intent(user()))))
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view(model(intent()))
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USER
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sealed class TasksIntent {
}@
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sealed class TasksIntent {
object InitialIntent : TasksIntent()
}@
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sealed class TasksIntent {
object InitialIntent : TasksIntent()
object RefreshIntent : TasksIntent()
}@
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sealed class TasksIntent {
object InitialIntent : TasksIntent()
object RefreshIntent : TasksIntent()
data class ActivateTaskIntent(val task: Task) : TasksIntent()
data class CompleteTaskIntent(val task: Task) : TasksIntent()
}@
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sealed class TasksIntent {
object InitialIntent : TasksIntent()
object RefreshIntent : TasksIntent()
data class ActivateTaskIntent(val task: Task) : TasksIntent()
data class CompleteTaskIntent(val task: Task) : TasksIntent()
object ClearCompletedTasksIntent : TasksIntent()
}@
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sealed class TasksIntent {
object InitialIntent : TasksIntent()
object RefreshIntent : TasksIntent()
data class ActivateTaskIntent(val task: Task) : TasksIntent()
data class CompleteTaskIntent(val task: Task) : TasksIntent()
object ClearCompletedTasksIntent : TasksIntent()
data class ChangeFilterIntent(val filterType: TasksFilterType) : TasksIntent()
}@
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sealed class TasksIntent {
object InitialIntent : TasksIntent()
object RefreshIntent : TasksIntent()
data class ActivateTaskIntent(val task: Task) : TasksIntent()
data class CompleteTaskIntent(val task: Task) : TasksIntent()
object ClearCompletedTasksIntent : TasksIntent()
data class ChangeFilterIntent(val filterType: TasksFilterType) : TasksIntent()
}@
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class TasksFragment
fun intents(): Observable {
}@
}@
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class TasksFragment
fun intents(): Observable {
return initialIntent()
}@a
private fun initialIntent(): Observable {
return Observable.just(InitialIntent)
}
}@
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class TasksFragment
fun_intents():_Observable {
return Observable.merge(initialIntent(),
refreshIntent())
}@a
private fun refreshIntent(): Observable {
return RxSwipeRefreshLayout.refreshes(swipeRefreshLayout)
.map { RefreshIntent }
}@
}@
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class TasksFragment
fun_intents():_Observable {
return Observable.merge(initialIntent(),
refreshIntent(),
completeTaskIntent(),
activateTaskIntent(),
clearCompletedTaskIntent(),
changeFilterIntent())
}@
}@
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USER
INTENTS
Intent
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intents // Observable
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intents // Observable
.map { intent -> actionFromIntent(intent) } // Observable
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fun actionFromIntent(intent: TasksIntent): TasksAction =
when (intent) {
is InitialIntent ->
is RefreshIntent ->
is ActivateTaskIntent ->
is CompleteTaskIntent ->
is ClearCompletedTasksIntent ->
is ChangeFilterIntent ->
}@
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fun actionFromIntent(intent: TasksIntent): TasksAction =
when (intent) {
is InitialIntent ->
is RefreshIntent ->
is ActivateTaskIntent ->
is CompleteTaskIntent ->
is ClearCompletedTasksIntent ->
is ChangeFilterIntent ->
}@
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fun actionFromIntent(intent: TasksIntent): TasksAction =
when (intent) {
is InitialIntent ->
is RefreshIntent ->
is ActivateTaskIntent ->
is CompleteTaskIntent ->
is ClearCompletedTasksIntent ->
is ChangeFilterIntent ->
}@
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fun actionFromIntent(intent: TasksIntent): TasksAction =
when (intent) {
is InitialIntent -> LoadAndFilterTasksAction(TasksFilterType.ALL_TASKS)
is RefreshIntent ->
is ActivateTaskIntent ->
is CompleteTaskIntent ->
is ClearCompletedTasksIntent ->
is ChangeFilterIntent ->
}@
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fun actionFromIntent(intent: TasksIntent): TasksAction =
when (intent) {
is InitialIntent -> LoadAndFilterTasksAction(TasksFilterType.ALL_TASKS)
is RefreshIntent -> LoadTasksAction
is ActivateTaskIntent ->
is CompleteTaskIntent ->
is ClearCompletedTasksIntent ->
is ChangeFilterIntent ->
}@
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fun actionFromIntent(intent: TasksIntent): TasksAction =
when (intent) {
is InitialIntent -> LoadAndFilterTasksAction(TasksFilterType.ALL_TASKS)
is RefreshIntent -> LoadTasksAction
is ActivateTaskIntent -> ActivateTaskAction(intent.task)
is CompleteTaskIntent ->
is ClearCompletedTasksIntent ->
is ChangeFilterIntent ->
}@
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fun actionFromIntent(intent: TasksIntent): TasksAction =
when (intent) {
is InitialIntent -> LoadAndFilterTasksAction(TasksFilterType.ALL_TASKS)
is RefreshIntent -> LoadTasksAction
is ActivateTaskIntent -> ActivateTaskAction(intent.task)
is CompleteTaskIntent -> CompleteTaskAction(intent.task)
is ClearCompletedTasksIntent ->
is ChangeFilterIntent ->
}@
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fun actionFromIntent(intent: TasksIntent): TasksAction =
when (intent) {
is InitialIntent -> LoadAndFilterTasksAction(TasksFilterType.ALL_TASKS)
is RefreshIntent -> LoadTasksAction
is ActivateTaskIntent -> ActivateTaskAction(intent.task)
is CompleteTaskIntent -> CompleteTaskAction(intent.task)
is ClearCompletedTasksIntent -> ClearCompletedTasksAction
is ChangeFilterIntent ->
}@
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fun actionFromIntent(intent: TasksIntent): TasksAction =
when (intent) {
is InitialIntent -> LoadAndFilterTasksAction(TasksFilterType.ALL_TASKS)
is RefreshIntent -> LoadTasksAction
is ActivateTaskIntent -> ActivateTaskAction(intent.task)
is CompleteTaskIntent -> CompleteTaskAction(intent.task)
is ClearCompletedTasksIntent -> ClearCompletedTasksAction
is ChangeFilterIntent -> LoadAndFilterTasksAction(intent.filterType)
}@
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fun actionFromIntent(intent: TasksIntent): TasksAction =
when (intent) {
is InitialIntent -> LoadAndFilterTasksAction(TasksFilterType.ALL_TASKS)
is RefreshIntent -> LoadTasksAction
is ActivateTaskIntent -> ActivateTaskAction(intent.task)
is CompleteTaskIntent -> CompleteTaskAction(intent.task)
is ClearCompletedTasksIntent -> ClearCompletedTasksAction
is ChangeFilterIntent -> LoadAndFilterTasksAction(intent.filterType)
}@
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private TasksAction actionFromIntent(MviIntent intent) {
if (intent instanceof InitialIntent) {
return LoadTasks.loadAndFilter(true, TasksFilterType.ALL_TASKS);
}
if (intent instanceof ChangeFilterIntent) {
return LoadTasks.loadAndFilter(false, ((ChangeFilterIntent) intent).filterType());
}
if (intent instanceof RefreshIntent) {
return LoadTasks.load(((RefreshIntent) intent).forceUpdate());
}
if (intent instanceof ActivateTaskIntent) {
return ActivateTaskAction.create(((ActivateTaskIntent) intent).task());
}
if (intent instanceof CompleteTaskIntent) {
return CompleteTaskAction.create(((CompleteTaskIntent) intent).task());
}
if (intent instanceof ClearCompletedTasksIntent) {
return ClearCompletedTasksAction.create();
}
throw new IllegalArgumentException("do not know how to treat this intent " + intent);
}
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private TasksAction actionFromIntent(MviIntent intent) {
if (intent instanceof InitialIntent) {
return LoadTasks.loadAndFilter(true, TasksFilterType.ALL_TASKS);
}
if (intent instanceof ChangeFilterIntent) {
return LoadTasks.loadAndFilter(false, ((ChangeFilterIntent) intent).filterType());
}
if (intent instanceof RefreshIntent) {
return LoadTasks.load(((RefreshIntent) intent).forceUpdate());
}
if (intent instanceof ActivateTaskIntent) {
return ActivateTaskAction.create(((ActivateTaskIntent) intent).task());
}
if (intent instanceof CompleteTaskIntent) {
return CompleteTaskAction.create(((CompleteTaskIntent) intent).task());
}
if (intent instanceof ClearCompletedTasksIntent) {
return ClearCompletedTasksAction.create();
}
throw new IllegalArgumentException("do not know how to treat this intent " + intent);
}
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private TasksAction actionFromIntent(MviIntent intent) {
if (intent instanceof InitialIntent) {
return LoadTasks.loadAndFilter(true, TasksFilterType.ALL_TASKS);
}
if (intent instanceof ChangeFilterIntent) {
return LoadTasks.loadAndFilter(false, ((ChangeFilterIntent) intent).filterType());
}
if (intent instanceof RefreshIntent) {
return LoadTasks.load(((RefreshIntent) intent).forceUpdate());
}
if (intent instanceof ActivateTaskIntent) {
return ActivateTaskAction.create(((ActivateTaskIntent) intent).task());
}
if (intent instanceof CompleteTaskIntent) {
return CompleteTaskAction.create(((CompleteTaskIntent) intent).task());
}
if (intent instanceof ClearCompletedTasksIntent) {
return ClearCompletedTasksAction.create();
}
throw new IllegalArgumentException("do not know how to treat this intent " + intent);
}
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private TasksAction actionFromIntent(MviIntent intent) {
if (intent instanceof InitialIntent) {
return LoadTasks.loadAndFilter(true, TasksFilterType.ALL_TASKS);
}
if (intent instanceof ChangeFilterIntent) {
return LoadTasks.loadAndFilter(false, ((ChangeFilterIntent) intent).filterType());
}
if (intent instanceof RefreshIntent) {
return LoadTasks.load(((RefreshIntent) intent).forceUpdate());
}
if (intent instanceof ActivateTaskIntent) {
return ActivateTaskAction.create(((ActivateTaskIntent) intent).task());
}
if (intent instanceof CompleteTaskIntent) {
return CompleteTaskAction.create(((CompleteTaskIntent) intent).task());
}
if (intent instanceof ClearCompletedTasksIntent) {
return ClearCompletedTasksAction.create();
}
throw new IllegalArgumentException("do not know how to treat this intent " + intent);
}
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fun actionFromIntent(intent: TasksIntent): TasksAction =
when (intent) {
is InitialIntent -> LoadAndFilterTasksAction(TasksFilterType.ALL_TASKS)
is RefreshIntent -> LoadTasksAction
is ActivateTaskIntent -> ActivateTaskAction(intent.task)
is CompleteTaskIntent -> CompleteTaskAction(intent.task)
is ClearCompletedTasksIntent -> ClearCompletedTasksAction
is ChangeFilterIntent -> LoadAndFilterTasksAction(intent.filterType)
}@
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sealed class TasksAction {
data class LoadAndFilterTasksAction(val filterType: TasksFilterType) : TasksAction()
object LoadTasksAction : TasksAction()
data class ActivateTaskAction(val task: Task) : TasksAction()
data class CompleteTaskAction(val task: Task) : TasksAction()
object ClearCompletedTasksAction : TasksAction()
}@
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USER
INTENTS
Intent
Action
INTENT
INTERPRETOR
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Action
Load and Filter Tasks Logic
Clear Completed Task Logic
Complete Task Logic
Activate Task Logic
Load Tasks Logic
Result
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var actionProcessor: ObservableTransformer =
ObservableTransformer { actions: Observable ->
}c
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var actionProcessor: ObservableTransformer =
ObservableTransformer { actions: Observable ->
}c
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var actionProcessor: ObservableTransformer =
ObservableTransformer { actions: Observable ->
actions.publish { shared ->
}b
}c
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var actionProcessor: ObservableTransformer =
ObservableTransformer { actions: Observable ->
actions.publish { shared ->
Observable.merge()a
}b
}c
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var actionProcessor: ObservableTransformer =
ObservableTransformer { actions: Observable ->
actions.publish { shared ->
Observable.merge(
shared.ofType(LoadTasksAction::class.java).compose(loadTasksProcessor)
)a
}b
}c
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var actionProcessor: ObservableTransformer =
ObservableTransformer { actions: Observable ->
actions.publish { shared ->
Observable.merge(
shared.ofType(LoadTasksAction::class.java).compose(loadTasksProcessor),
shared.ofType(LoadAndFilterTasksAction::class.java).compose(loadAndFilterTasksProcessor)
)a
}b
}c
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var actionProcessor: ObservableTransformer =
ObservableTransformer { actions: Observable ->
actions.publish { shared ->
Observable.merge(
shared.ofType(LoadTasksAction::class.java).compose(loadTasksProcessor),
shared.ofType(LoadAndFilterTasksAction::class.java).compose(loadAndFilterTasksProcessor),
shared.ofType(ActivateTaskAction::class.java).compose(activateTaskProcessor)
)a
}b
}c
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var actionProcessor: ObservableTransformer =
ObservableTransformer { actions: Observable ->
actions.publish { shared ->
Observable.merge(
shared.ofType(LoadTasksAction::class.java).compose(loadTasksProcessor),
shared.ofType(LoadAndFilterTasksAction::class.java).compose(loadAndFilterTasksProcessor),
shared.ofType(ActivateTaskAction::class.java).compose(activateTaskProcessor),
shared.ofType(ClearCompletedTasksAction::class.java).compose(clearCompletedTasksProcessor)
)a
}b
}c
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var actionProcessor: ObservableTransformer =
ObservableTransformer { actions: Observable ->
actions.publish { shared ->
Observable.merge(
shared.ofType(LoadTasksAction::class.java).compose(loadTasksProcessor),
shared.ofType(LoadAndFilterTasksAction::class.java).compose(loadAndFilterTasksProcessor),
shared.ofType(ActivateTaskAction::class.java).compose(activateTaskProcessor),
shared.ofType(ClearCompletedTasksAction::class.java).compose(clearCompletedTasksProcessor),
shared.ofType(CompleteTaskAction::class.java).compose(completeTaskProcessor)
)a
}b
}c
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var actionProcessor: ObservableTransformer =
ObservableTransformer { actions: Observable ->
actions.publish { shared ->
Observable.merge(
shared.ofType(LoadTasksAction::class.java).compose(loadTasksProcessor),
shared.ofType(LoadAndFilterTasksAction::class.java).compose(loadAndFilterTasksProcessor),
shared.ofType(ActivateTaskAction::class.java).compose(activateTaskProcessor),
shared.ofType(ClearCompletedTasksAction::class.java).compose(clearCompletedTasksProcessor),
shared.ofType(CompleteTaskAction::class.java).compose(completeTaskProcessor)
)a
}b
}c
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val loadTasksProcessor =
ObservableTransformer { actions: Observable ->
actions.switchMap {
tasksRepository.getTasks() // Observable>
}@
}@
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val loadTasksProcessor =
ObservableTransformer { actions: Observable ->
actions.switchMap {
tasksRepository.getTasks() // Observable>
.startWith(LoadTasksResult.InFlight)
}@
}@
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val loadTasksProcessor =
ObservableTransformer { actions: Observable ->
actions.switchMap {
tasksRepository.getTasks() // Observable>
.startWith(LoadTasksResult.InFlight)
.map { tasks -> LoadTasksResult.Success(tasks) }
}@
}@
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val loadTasksProcessor =
ObservableTransformer { actions: Observable ->
actions.switchMap {
tasksRepository.getTasks() // Observable>
.startWith(LoadTasksResult.InFlight)
.map { tasks -> LoadTasksResult.Success(tasks) }
.onErrorReturn { t -> loadTasksResult.Failure(t) }
}@
}@
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val loadTasksProcessor =
ObservableTransformer { actions: Observable ->
actions.switchMap {
tasksRepository.getTasks() // Observable>
.startWith(LoadTasksResult.InFlight)
.map { tasks -> LoadTasksResult.Success(tasks) }
.onErrorReturn { t -> loadTasksResult.Failure(t) }
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
}@
}@
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val loadTasksProcessor =
ObservableTransformer { actions: Observable ->
actions.switchMap {
tasksRepository.getTasks() // Observable>
.startWith(LoadTasksResult.InFlight)
.map { tasks -> LoadTasksResult.Success(tasks) }
.onErrorReturn { t -> loadTasksResult.Failure(t) }
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
}@
}@
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val loadTasksProcessor =
ObservableTransformer { actions: Observable ->
actions.switchMap {
tasksRepository.getTasks() // Observable>
.map { tasks -> LoadTasksResult.Success(tasks) }
.onErrorReturn { t -> loadTasksResult.Failure(t) }
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.startWith(LoadTasksResult.InFlight)
}@
}@
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var actionProcessor: ObservableTransformer =
ObservableTransformer { actions: Observable ->
actions.publish { shared ->
Observable.merge(
shared.ofType(LoadTasksAction::class.java).compose(loadTasksProcessor),
shared.ofType(LoadAndFilterTasksAction::class.java).compose(loadAndFilterTasksProcessor),
shared.ofType(ActivateTaskAction::class.java).compose(activateTaskProcessor),
shared.ofType(ClearCompletedTasksAction::class.java).compose(clearCompletedTasksProcessor),
shared.ofType(CompleteTaskAction::class.java).compose(completeTaskProcessor)
)a
}b
}c
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intents // Observable
.map { intent -> actionFromIntent(intent) } // Observable
.compose(actionProcessor) // Observable
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USER
INTENTS
Intent
Result Action
INTENT
INTERPRETOR
PROCESSOR
REPOSITORY
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θϩ͔Βը໘Λ࡞Δʹʁ
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data class TasksViewState(z
)@
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data class TasksViewState(z
val isLoading: Boolean
)@
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data class TasksViewState(z
val isLoading: Boolean,
val tasksFilterType: TasksFilterType
)@
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data class TasksViewState(z
val isLoading: Boolean,
val tasksFilterType: TasksFilterType,
val tasks: List
)@
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data class TasksViewState(z
val isLoading: Boolean,
val tasksFilterType: TasksFilterType,
val tasks: List,
val error: Throwable?
)@
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data class TasksViewState(z
val isLoading: Boolean,
val tasksFilterType: TasksFilterType,
val tasks: List,
val error: Throwable?,
val taskComplete: Boolean,
val taskActivated: Boolean,
val completedTasksCleared: Boolean
)@
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data class TasksViewState(z
val isLoading: Boolean,
val tasksFilterType: TasksFilterType,
val tasks: List,
val error: Throwable?,
val taskComplete: Boolean,
val taskActivated: Boolean,
val completedTasksCleared: Boolean
)@
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data class TasksViewState(z
val isLoading: Boolean,
val tasksFilterType: TasksFilterType,
val tasks: List,
val error: Throwable?,
val taskComplete: Boolean,
val taskActivated: Boolean,
val completedTasksCleared: Boolean
)@{
companion object Factory {
fun default() = TasksViewState(
isLoading = false,
tasksFilterType = ALL_TASKS,
tasks = emptyList(),
error = null,
taskComplete = false,
taskActivated = false,
completedTasksCleared = false)
}
}
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New
State
Result
Default
State
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New
State
REDUCER
Result
Default
State
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New
State
REDUCER
Result
Previous
State
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intents // Observable
.map { intent -> actionFromIntent(intent) } // Observable
.compose(actionProcessor) // Observable
.scan(TasksViewState.default(), reducer) // Observable
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val reducer = BiFunction
{ previousState: TasksViewState, result: TasksResult ->
}e
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val reducer = BiFunction
{ previousState: TasksViewState, result: TasksResult ->
}e
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val reducer = BiFunction
{ previousState: TasksViewState, result: TasksResult ->
when (result)_{
is LoadTasksResult -> /***/
is LoadAndFilterTasksResult -> /***/
is CompleteTaskResult -> /***/
is ActivateTaskResult -> /***/
is ClearCompletedTasksResult -> /***/
}d
}e
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val reducer = BiFunction
{ previousState: TasksViewState, result: TasksResult ->
when (result)_{
is LoadTasksResult -> {
when (result) {
is LoadTasksResult.InFlight -> /***/
is LoadTasksResult.Failure -> /***/
is LoadTasksResult.Success -> /***/
}b
}c
is LoadAndFilterTasksResult -> /***/
is CompleteTaskResult -> /***/
is ActivateTaskResult -> /***/
is ClearCompletedTasksResult -> /***/
}d
}e
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val reducer = BiFunction
{ previousState: TasksViewState, result: TasksResult ->
when (result)_{
is LoadTasksResult -> {
when (result) {
is LoadTasksResult.InFlight -> previousState.copy(isLoading = true)
is LoadTasksResult.Failure -> /***/
is LoadTasksResult.Success -> /***/
}b
}c
is LoadAndFilterTasksResult -> /***/
is CompleteTaskResult -> /***/
is ActivateTaskResult -> /***/
is ClearCompletedTasksResult -> /***/
}d
}e
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val reducer = BiFunction
{ previousState: TasksViewState, result: TasksResult ->
when (result)_{
is LoadTasksResult -> {
when (result) {
is LoadTasksResult.InFlight -> previousState.copy(isLoading = true)
is LoadTasksResult.Failure -> previousState.copy(isLoading = false,
error = result.error)
is LoadTasksResult.Success -> /***/
}b
}c
is LoadAndFilterTasksResult -> /***/
is CompleteTaskResult -> /***/
is ActivateTaskResult -> /***/
is ClearCompletedTasksResult -> /***/
}d
}e
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val reducer = BiFunction
{ previousState: TasksViewState, result: TasksResult ->
when (result)_{
is LoadTasksResult -> {
when (result) {
is LoadTasksResult.InFlight -> previousState.copy(isLoading = true)
is LoadTasksResult.Failure -> previousState.copy(isLoading = false,
error = result.error)
is LoadTasksResult.Success -> {
previousState.copy(isLoading = false,
tasks = result.tasks)
}a
}b
}c
is LoadAndFilterTasksResult -> /***/
is CompleteTaskResult -> /***/
is ActivateTaskResult -> /***/
is ClearCompletedTasksResult -> /***/
}d
}e
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val reducer = BiFunction
{ previousState: TasksViewState, result: TasksResult ->
when (result)_{
is LoadTasksResult -> {
when (result) {
is LoadTasksResult.InFlight -> previousState.copy(isLoading = true)
is LoadTasksResult.Failure -> previousState.copy(isLoading = false,
error = result.error)
is LoadTasksResult.Success -> {
previousState.copy(isLoading = false,
tasks = result.tasks)
}a
}b
}c
is LoadAndFilterTasksResult -> /***/
is CompleteTaskResult -> /***/
is ActivateTaskResult -> /***/
is ClearCompletedTasksResult -> /***/
}d
}e
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USER
INTENTS
Intent
Result Action
State
INTENT
INTERPRETOR
REDUCER
PROCESSOR
REPOSITORY
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intents // Observable
.map { intent -> actionFromIntent(intent) } // Observable
.compose(actionProcessor) // Observable
.scan(TasksViewState.default(), reducer) // Observable
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intents // Observable
.map { intent -> actionFromIntent(intent) } // Observable
.compose(actionProcessor) // Observable
.scan(TasksViewState.default(), reducer) // Observable
.subscribe { state -> render(state) }
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fun render(state: TasksViewState) {
}u
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fun render(state: TasksViewState) {
swipeRefreshLayout.isRefreshing = state.isLoading
}u
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fun render(state: TasksViewState) {
swipeRefreshLayout.isRefreshing = state.isLoading
if (state.error != null) {
showLoadingTasksError()
return
}a
}u
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fun render(state: TasksViewState) {
swipeRefreshLayout.isRefreshing = state.isLoading
if (state.error != null) {
showLoadingTasksError()
return
}a
if (state.taskActivated) {
showMessage(getString(R.string.task_marked_active))
}b
if (state.taskComplete) {
showMessage(getString(R.string.task_marked_complete))
}c
if (state.completedTasksCleared) {
showMessage(getString(R.string.completed_tasks_cleared))
}d
}u
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if (state.taskActivated) {
showMessage(getString(R.string.task_marked_active))
}b
if (state.taskComplete) {
showMessage(getString(R.string.task_marked_complete))
}c
if (state.completedTasksCleared) {
showMessage(getString(R.string.completed_tasks_cleared))
}d
if (state.tasks.isEmpty()) {
when (state.tasksFilterType) {z
ACTIVE_TASKS -> showNoActiveTasks()
COMPLETED_TASKS -> showNoCompletedTasks()
ALL_TASKS -> showNoTasks()
}e
}_
}u
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showMessage(getString(R.string.completed_tasks_cleared))
}d
if (state.tasks.isEmpty()) {
when (state.tasksFilterType) {z
ACTIVE_TASKS -> showNoActiveTasks()
COMPLETED_TASKS -> showNoCompletedTasks()
ALL_TASKS -> showNoTasks()
}e
}_else {
listAdapter.replaceData(state.tasks)
tasksView.visibility = View.VISIBLE
noTasksView.visibility = View.GONE
when (state.tasksFilterType) {
ACTIVE_TASKS -> showActiveFilterLabel()
COMPLETED_TASKS -> showCompletedFilterLabel()
ALL_TASKS -> showAllFilterLabel()
}g
}h
}u
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fun render(state: TasksViewState) {
swipeRefreshLayout.isRefreshing = state.isLoading
if (state.error != null) {
showLoadingTasksError()
return
}a
if (state.taskActivated) {
showMessage(getString(R.string.task_marked_active))
}b
if (state.taskComplete) {
showMessage(getString(R.string.task_marked_complete))
}c
if (state.completedTasksCleared) {
showMessage(getString(R.string.completed_tasks_cleared))
}d
if (state.tasks.isEmpty()) {
when (state.tasksFilterType) {
ACTIVE_TASKS -> showNoActiveTasks()
COMPLETED_TASKS -> showNoCompletedTasks()
ALL_TASKS -> showNoTasks()
}e
}_else {
listAdapter.replaceData(state.tasks)
tasksView.visibility = View.VISIBLE
noTasksView.visibility = View.GONE
when (state.tasksFilterType) {
ACTIVE_TASKS -> showActiveFilterLabel()
COMPLETED_TASKS -> showCompletedFilterLabel()
ALL_TASKS -> showAllFilterLabel()
}g
}h
}u
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USER
INTENTS
RENDER
Intent
Result Action
State
INTENT
INTERPRETOR
REDUCER
PROCESSOR
REPOSITORY
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effects sidS
Side effects
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USER
INTENTS
RENDER
Intent
Result Action
State
INTENT
INTERPRETOR
REDUCER
PROCESSOR
REPOSITORY
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USER
INTENTS
RENDER
Intent
Result Action
State
INTENT
INTERPRETOR
REDUCER
PROCESSOR
REPOSITORY
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USER
INTENTS
RENDER
Intent
Result Action
State
INTENT
INTERPRETOR
REDUCER
PROCESSOR
REPOSITORY
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USER
Intent
Result Action
State
INTENT
INTERPRETOR
REDUCER
REPOSITORY
INTENTS
RENDER
PROCESSOR
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USER
INTENTS
RENDER
Intent
Result Action
State
INTENT
INTERPRETOR
REDUCER
PROCESSOR
REPOSITORY
Unidirectional data flow
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USER
INTENTS
RENDER
Intent
Result Action
State
INTENT
INTERPRETOR
REDUCER
PROCESSOR
REPOSITORY
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USER
USER INTERFACE INTENTS
RENDER
Intent
Result Action
State
INTENT
INTERPRETOR
REDUCER
PROCESSOR
REPOSITORY
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USER
USER INTERFACE
VIEW MODEL
INTENTS
RENDER
Intent
Result Action
State
INTENT
INTERPRETOR
REDUCER
PROCESSOR
REPOSITORY
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interface TasksUi {
fun render(state: TasksViewState)
fun intents(): Observable
}@
interface TasksViewModel {
fun processIntents(intents: Observable)
fun states(): Observable
}@
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interface TasksUi {
fun render(state: TasksViewState)
fun intents(): Observable
}@
interface TasksViewModel {
fun processIntents(intents: Observable)
fun states(): Observable
}@
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interface TasksUi {
fun render(state: TasksViewState)
fun intents(): Observable
}@
interface TasksViewModel {
fun processIntents(intents: Observable)
fun states(): Observable
}@
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͔Βͷ͓ిͰ͢
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User: initialIntent()
App: render()
User: activateTask(1)
User: activateTask(2)
User: refresh()
Mum:
Android: you.onStop()
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User: initialIntent()
App: render()
User: activateTask(1)
User: activateTask(2)
User: refresh()
Mum:
Android: you.onStop()
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User: initialIntent()
App: render()
User: activateTask(1)
User: activateTask(2)
User: refresh()
Mum:
Android: you.onStop()
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User: initialIntent()
App: render()
User: activateTask(1)
User: activateTask(2)
User: refresh()
Mum:
Android: app.onStop()
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USER
USER INTERFACE
VIEW MODEL
INTENTS
RENDER
Intent
Result Action
State
INTENT
INTERPRETOR
REDUCER
PROCESSOR
REPOSITORY
C
B
A
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INTENTS
RENDER
VIEW MODEL
Intent
Result Action
State
INTENT
INTERPRETOR
REDUCER
PROCESSOR
REPOSITORY
B
C
A
USER
USER INTERFACE
B
C
A
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USER
USER INTERFACE
VIEW MODEL
INTENTS
RENDER
Intent
Result Action
State
INTENT
INTERPRETOR
REDUCER
PROCESSOR
REPOSITORY
A
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Config change ΤϒϦΣΞ
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No content
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USER INTERFACE
VIEW MODEL
INTENTS
RENDER
Intent
Result Action
State
INTENT
INTERPRETOR
REDUCER
PROCESSOR
REPOSITORY
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USER INTERFACE
VIEW MODEL
SOURCE
SUBSCRIBER
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USER INTERFACE
VIEW MODEL
SOURCE
SUBSCRIBER
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USER INTERFACE
VIEW MODEL
SOURCE
SUBSCRIBER
SUBJECT
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USER INTERFACE
VIEW MODEL
SOURCE
SUBSCRIBER
SUBJECT
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USER INTERFACE
VIEW MODEL
SOURCE
SUBSCRIBER
SUBJECT
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USER INTERFACE
VIEW MODEL
SOURCE
SUBSCRIBER
SUBJECT
.autoConnect(0)
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USER INTERFACE
VIEW MODEL
SOURCE
SUBSCRIBER
.autoConnect(0) SUBJECT
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VIEW MODEL
.autoConnect(0) SUBJECT
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USER INTERFACE
VIEW MODEL
SOURCE
SUBSCRIBER
.autoConnect(0) SUBJECT
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USER INTERFACE
VIEW MODEL
SOURCE
SUBSCRIBER
.replay(1)
.autoConnect(0)
SUBJECT
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class TasksViewModel : ViewModel() {
fun processIntents(intents: Observable) {
}b
fun states(): Observable {
}c
}e
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class TasksViewModel : ViewModel() {
private val intentsSubject = PublishSubject.create()
fun processIntents(intents: Observable) {
intents.subscribe(intentsSubject)
}b
fun states(): Observable {
}c
}e
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class TasksViewModel : ViewModel() {
private val intentsSubject = PublishSubject.create = compose()
fun processIntents(intents: Observable) {
intents.subscribe(intentsSubject)
}b
private fun compose(): Observable {
}c
}e
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class TasksViewModel : ViewModel() {
private val intentsSubject = PublishSubject.create()
val states: Observable = compose()
fun processIntents(intents: Observable) {
intents.subscribe(intentsSubject)
}b
private fun compose(): Observable {
return intentsSubject
.map { intent -> actionFromIntent(intent) }
.compose(actionProcessor)
.scan(TasksViewState.default(), reducer)
}c
}e
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class TasksViewModel : ViewModel() {
private val intentsSubject = PublishSubject.create()
val states: Observable = compose()
fun processIntents(intents: Observable) {
intents.subscribe(intentsSubject)
}b
private fun compose(): Observable {
return intentsSubject
.map { intent -> actionFromIntent(intent) }
.compose(actionProcessor)
.scan(TasksViewState.default(), reducer)
.replay(1)
.autoConnect(0)
}c
}e
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class TasksViewModel : ViewModel() {
private val intentsSubject = PublishSubject.create()
val states: Observable = compose()
fun processIntents(intents: Observable) {
intents.subscribe(intentsSubject)
}b
private fun compose(): Observable {
return intentsSubject
.map { intent -> actionFromIntent(intent) }
.compose(actionProcessor)
.scan(TasksViewState.default(), reducer)
.replay(1)
.autoConnect(0)
}c
}e
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class TasksFragment : Fragment() {
fun intents(): Observable { /***/ }
fun render(state: TasksViewState) { /***/ }
}d
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class TasksFragment : Fragment() {
private val viewModel: TasksViewModel by lazy(NONE) {
ViewModelProviders.of(this).get(TasksViewModel::class.java)
}a
fun intents(): Observable { /***/ }
fun render(state: TasksViewState) { /***/ }
}d
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class TasksFragment : Fragment() {
private val viewModel: TasksViewModel by lazy(NONE) {
ViewModelProviders.of(this).get(TasksViewModel::class.java)
}a
fun intents(): Observable { /***/ }
fun render(state: TasksViewState) { /***/ }
override fun onStart() {
viewModel.states().subscribe(this::render)
}b
}d
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class TasksFragment : Fragment() {
private val viewModel: TasksViewModel by lazy(NONE) {
ViewModelProviders.of(this).get(TasksViewModel::class.java)
}a
private val disposables = CompositeDisposable()a
fun intents(): Observable { /***/ }
fun render(state: TasksViewState) { /***/ }
override fun onStart() {
disposables.add(viewModel.states().subscribe(this::render))
}b
}d
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class TasksFragment : Fragment() {
private val viewModel: TasksViewModel by lazy(NONE) {
ViewModelProviders.of(this).get(TasksViewModel::class.java)
}a
private val disposables = CompositeDisposable()
fun intents(): Observable { /***/ }
fun render(state: TasksViewState) { /***/ }
override fun onStart() {
disposables.add(viewModel.states().subscribe(this::render))
viewModel.processIntents(intents())
}b
}d
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class TasksFragment : Fragment() {
private val viewModel: TasksViewModel by lazy(NONE) {
ViewModelProviders.of(this).get(TasksViewModel::class.java)
}a
private val disposables = CompositeDisposable()
fun intents(): Observable { /***/ }
fun render(state: TasksViewState) { /***/ }
override fun onStart() {
disposables.add(viewModel.states().subscribe(this::render))
viewModel.processIntents(intents())
}b
override fun onDestroy() {
disposables.dispose()
super.onDestroy()
}c
}d
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class TasksFragment : Fragment() {
private val viewModel: TasksViewModel by lazy(NONE) {
ViewModelProviders.of(this).get(TasksViewModel::class.java)
}a
private val disposables = CompositeDisposable()
fun intents(): Observable { /***/ }
fun render(state: TasksViewState) { /***/ }
override fun onStart() {
disposables.add(viewModel.states().subscribe(this::render))
viewModel.processIntents(intents())
}b
override fun onDestroy() {
disposables.dispose()
super.onDestroy()
}c
}d
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class TasksFragment : Fragment() {
private val viewModel: TasksViewModel by lazy(NONE) {
ViewModelProviders.of(this).get(TasksViewModel::class.java)
}a
private val disposables = CompositeDisposable()
fun intents(): Observable { /***/ }
fun render(state: TasksViewState) { /***/ }
override fun onStart() {
disposables.add(viewModel.states().subscribe(this::render))
viewModel.processIntents(intents())
}b
override fun onDestroy() {
disposables.dispose()
super.onDestroy()
}c
}d
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class TasksFragment
fun intents(): Observable {
return Observable.merge(initialIntent(),
refreshIntent(),
completeTaskIntent(),
activateTaskIntent(),
clearCompletedTaskIntent(),
changeFilterIntent())
}@
}@
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class TasksFragment
fun intents(): Observable {
return Observable.merge(initialIntent(),
refreshIntent(),
completeTaskIntent(),
activateTaskIntent(),
clearCompletedTaskIntent(),
changeFilterIntent())
}@
}@
fun actionFromIntent(intent: TasksIntent): TasksAction =
when (intent) {
is InitialIntent -> LoadAndFilterTasksAction
/***/
}@
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private fun compose(): Observable {
return intentsSubject
.map { this.actionFromIntent(it) }
.compose(actionProcessorHolder.actionProcessor)
.scan(TasksViewState.idle(), reducer)
.replay(1)
.autoConnect(0)
}a
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private fun compose(): Observable {
return intentsSubject
.compose(intentFilter)
.map { this.actionFromIntent(it) }
.compose(actionProcessorHolder.actionProcessor)
.scan(TasksViewState.idle(), reducer)
.replay(1)
.autoConnect(0)
}a
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private fun compose(): Observable {
return intentsSubject
.compose(intentFilter)
.map { this.actionFromIntent(it) }
.compose(actionProcessorHolder.actionProcessor)
.scan(TasksViewState.idle(), reducer)
.replay(1)
.autoConnect(0)
}a
private val intentFilter: ObservableTransformer
get() = ObservableTransformer { intents ->
}z
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private fun compose(): Observable {
return intentsSubject
.compose(intentFilter)
.map { this.actionFromIntent(it) }
.compose(actionProcessorHolder.actionProcessor)
.scan(TasksViewState.idle(), reducer)
.replay(1)
.autoConnect(0)
}a
private val intentFilter: ObservableTransformer
get() = ObservableTransformer { intents ->
intents.publish { shared ->
Observable.merge()w
}o
}z
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private fun compose(): Observable {
return intentsSubject
.compose(intentFilter)
.map { this.actionFromIntent(it) }
.compose(actionProcessorHolder.actionProcessor)
.scan(TasksViewState.idle(), reducer)
.replay(1)
.autoConnect(0)
}a
private val intentFilter: ObservableTransformer
get() = ObservableTransformer { intents ->
intents.publish { shared ->
Observable.merge(
shared.ofType(InitialIntent::class.java).take(1)
)w
}o
}z
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private fun compose(): Observable {
return intentsSubject
.compose(intentFilter)
.map { this.actionFromIntent(it) }
.compose(actionProcessorHolder.actionProcessor)
.scan(TasksViewState.idle(), reducer)
.replay(1)
.autoConnect(0)
}a
private val intentFilter: ObservableTransformer
get() = ObservableTransformer { intents ->
intents.publish { shared ->
Observable.merge(
shared.ofType(InitialIntent::class.java).take(1),
shared.notOfType(InitialIntent::class.java)
)w
}o
}z
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private fun compose(): Observable {
return intentsSubject
.compose(intentFilter)
.map { this.actionFromIntent(it) }
.compose(actionProcessorHolder.actionProcessor)
.scan(TasksViewState.idle(), reducer)
.replay(1)
.autoConnect(0)
}a
private val intentFilter: ObservableTransformer
get() = ObservableTransformer { intents ->
intents.publish { shared ->
Observable.merge(
shared.ofType(InitialIntent::class.java).take(1),
shared.notOfType(InitialIntent::class.java)
)w
}o
}z
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Ͷ͐ͬͯΔʁςετʂ
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USER INTERFACE
VIEW MODEL
INTENTS
RENDER
Intent
Result Action
State
INTENT
INTERPRETOR
REDUCER
PROCESSOR
REPOSITORY
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USER INTERFACE
VIEW MODEL
INTENTS
RENDER
Intent
Result Action
State
SUBJECT
PROCESSOR
REPOSITORY
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USER INTERFACE
VIEW MODEL
INTENTS
RENDER
Intent
Result Action
State
TEST OBSERVER
PROCESSOR
REPOSITORY
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USER INTERFACE
VIEW MODEL
INTENTS
RENDER
Intent
Result Action
State
INTENT
INTERPRETOR
REDUCER
PROCESSOR
REPOSITORY
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USER INTERFACE
VIEW MODEL
SUBJECT
TEST OBSERVER
Intent
Result Action
State
INTENT
INTERPRETOR
REDUCER
PROCESSOR
REPOSITORY
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USER INTERFACE
VIEW MODEL
INTENTS
RENDER
Intent
Result Action
State
INTENT
INTERPRETOR
REDUCER
PROCESSOR
REPOSITORY
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USER INTERFACE
VIEW MODEL
INTENTS
RENDER
Intent
Result Action
State
INTENT
INTERPRETOR
REDUCER
PROCESSOR
REPOSITORY
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USER INTERFACE
VIEW MODEL
INTENTS
RENDER
Intent
Result Action
State
INTENT
INTERPRETOR
REDUCER
PROCESSOR
REPOSITORY
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Action
Load and Filter Tasks Logic
Clear Completed Task Logic
Complete Task Logic
Activate Task Logic
Load Tasks Logic
Result PROCESSOR
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Load and Filter Tasks Logic
Clear Completed Task Logic
Complete Task Logic
Activate Task Logic
Load Tasks Logic SUBJECT
TEST OBSERVER
SUBJECT
SUBJECT
SUBJECT
SUBJECT
TEST OBSERVER
TEST OBSERVER
TEST OBSERVER
TEST OBSERVER
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No content
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Fin
Benoît Quenaudon @oldergod