Tweet
Tweet

Slide 1

Slide 1 text

Model-View-Intent for Android Benoît Quenaudon @oldergod

Slide 2

Slide 2 text

No content

Slide 3

Slide 3 text

“What if the user was a function?” by Andre Staltz

Slide 4

Slide 4 text

“What if the user was a function?” by Andre Staltz

Slide 5

Slide 5 text

user()

Slide 6

Slide 6 text

intent(user())

Slide 7

Slide 7 text

model(intent(user()))

Slide 8

Slide 8 text

view(model(intent(user())))

Slide 9

Slide 9 text

user(view(model(intent(user()))))

Slide 10

Slide 10 text

view(model(intent()))

Slide 11

Slide 11 text

No content

Slide 12

Slide 12 text

USER

Slide 13

Slide 13 text

sealed class TasksIntent { }@

Slide 14

Slide 14 text

sealed class TasksIntent { object InitialIntent : TasksIntent() }@

Slide 15

Slide 15 text

No content

Slide 16

Slide 16 text

sealed class TasksIntent { object InitialIntent : TasksIntent() object RefreshIntent : TasksIntent() }@

Slide 17

Slide 17 text

No content

Slide 18

Slide 18 text

sealed class TasksIntent { object InitialIntent : TasksIntent() object RefreshIntent : TasksIntent() data class ActivateTaskIntent(val task: Task) : TasksIntent() data class CompleteTaskIntent(val task: Task) : TasksIntent() }@

Slide 19

Slide 19 text

No content

Slide 20

Slide 20 text

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() }@

Slide 21

Slide 21 text

No content

Slide 22

Slide 22 text

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() }@

Slide 23

Slide 23 text

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() }@

Slide 24

Slide 24 text

class TasksFragment fun intents(): Observable { }@ }@

Slide 25

Slide 25 text

class TasksFragment fun intents(): Observable { return initialIntent() }@a private fun initialIntent(): Observable { return Observable.just(InitialIntent) } }@

Slide 26

Slide 26 text

class TasksFragment fun_intents():_Observable { return Observable.merge(initialIntent(), refreshIntent()) }@a private fun refreshIntent(): Observable { return RxSwipeRefreshLayout.refreshes(swipeRefreshLayout) .map { RefreshIntent } }@ }@

Slide 27

Slide 27 text

class TasksFragment fun_intents():_Observable { return Observable.merge(initialIntent(), refreshIntent(), completeTaskIntent(), activateTaskIntent(), clearCompletedTaskIntent(), changeFilterIntent()) }@ }@

Slide 28

Slide 28 text

USER INTENTS Intent

Slide 29

Slide 29 text

intents // Observable

Slide 30

Slide 30 text

intents // Observable .map { intent -> actionFromIntent(intent) } // Observable

Slide 31

Slide 31 text

fun actionFromIntent(intent: TasksIntent): TasksAction = when (intent) { is InitialIntent -> is RefreshIntent -> is ActivateTaskIntent -> is CompleteTaskIntent -> is ClearCompletedTasksIntent -> is ChangeFilterIntent -> }@

Slide 32

Slide 32 text

fun actionFromIntent(intent: TasksIntent): TasksAction = when (intent) { is InitialIntent -> is RefreshIntent -> is ActivateTaskIntent -> is CompleteTaskIntent -> is ClearCompletedTasksIntent -> is ChangeFilterIntent -> }@

Slide 33

Slide 33 text

fun actionFromIntent(intent: TasksIntent): TasksAction = when (intent) { is InitialIntent -> is RefreshIntent -> is ActivateTaskIntent -> is CompleteTaskIntent -> is ClearCompletedTasksIntent -> is ChangeFilterIntent -> }@

Slide 34

Slide 34 text

fun actionFromIntent(intent: TasksIntent): TasksAction = when (intent) { is InitialIntent -> LoadAndFilterTasksAction(TasksFilterType.ALL_TASKS) is RefreshIntent -> is ActivateTaskIntent -> is CompleteTaskIntent -> is ClearCompletedTasksIntent -> is ChangeFilterIntent -> }@

Slide 35

Slide 35 text

fun actionFromIntent(intent: TasksIntent): TasksAction = when (intent) { is InitialIntent -> LoadAndFilterTasksAction(TasksFilterType.ALL_TASKS) is RefreshIntent -> LoadTasksAction is ActivateTaskIntent -> is CompleteTaskIntent -> is ClearCompletedTasksIntent -> is ChangeFilterIntent -> }@

Slide 36

Slide 36 text

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 -> }@

Slide 37

Slide 37 text

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 -> }@

Slide 38

Slide 38 text

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 -> }@

Slide 39

Slide 39 text

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) }@

Slide 40

Slide 40 text

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) }@

Slide 41

Slide 41 text

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() }@

Slide 42

Slide 42 text

USER INTENTS Intent Action INTENT INTERPRETOR

Slide 43

Slide 43 text

Action Load and Filter Tasks Logic Clear Completed Task Logic Complete Task Logic Activate Task Logic Load Tasks Logic Result

Slide 44

Slide 44 text

var actionProcessor: ObservableTransformer = ObservableTransformer { actions: Observable -> }c

Slide 45

Slide 45 text

var actionProcessor: ObservableTransformer = ObservableTransformer { actions: Observable -> }c

Slide 46

Slide 46 text

var actionProcessor: ObservableTransformer = ObservableTransformer { actions: Observable -> actions.publish { shared -> Observable.merge()a }b }c

Slide 47

Slide 47 text

var actionProcessor: ObservableTransformer = ObservableTransformer { actions: Observable -> actions.publish { shared -> Observable.merge( shared.ofType(LoadTasksAction::class.java).compose(loadTasksProcessor) )a }b }c

Slide 48

Slide 48 text

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

Slide 49

Slide 49 text

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

Slide 50

Slide 50 text

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

Slide 51

Slide 51 text

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

Slide 52

Slide 52 text

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

Slide 53

Slide 53 text

val loadTasksProcessor = ObservableTransformer { actions: Observable -> actions.switchMap { tasksRepository.getTasks() // Observable> }@ }@

Slide 54

Slide 54 text

val loadTasksProcessor = ObservableTransformer { actions: Observable -> actions.switchMap { tasksRepository.getTasks() // Observable> .startWith(LoadTasksResult.InFlight) }@ }@

Slide 55

Slide 55 text

val loadTasksProcessor = ObservableTransformer { actions: Observable -> actions.switchMap { tasksRepository.getTasks() // Observable> .startWith(LoadTasksResult.InFlight) .map { tasks -> LoadTasksResult.Success(tasks) } }@ }@

Slide 56

Slide 56 text

val loadTasksProcessor = ObservableTransformer { actions: Observable -> actions.switchMap { tasksRepository.getTasks() // Observable> .startWith(LoadTasksResult.InFlight) .map { tasks -> LoadTasksResult.Success(tasks) } .onErrorReturn { t -> loadTasksResult.Failure(t) } }@ }@

Slide 57

Slide 57 text

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()) }@ }@

Slide 58

Slide 58 text

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()) }@ }@

Slide 59

Slide 59 text

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) }@ }@

Slide 60

Slide 60 text

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

Slide 61

Slide 61 text

intents // Observable .map { intent -> actionFromIntent(intent) } // Observable .compose(actionProcessor) // Observable

Slide 62

Slide 62 text

USER INTENTS Intent Result Action INTENT INTERPRETOR PROCESSOR REPOSITORY

Slide 63

Slide 63 text

What do we need to render anything?

Slide 64

Slide 64 text

data class TasksViewState(z )@

Slide 65

Slide 65 text

data class TasksViewState(z val isLoading: Boolean )@

Slide 66

Slide 66 text

data class TasksViewState(z val isLoading: Boolean, val tasksFilterType: TasksFilterType )@

Slide 67

Slide 67 text

data class TasksViewState(z val isLoading: Boolean, val tasksFilterType: TasksFilterType, val tasks: List )@

Slide 68

Slide 68 text

data class TasksViewState(z val isLoading: Boolean, val tasksFilterType: TasksFilterType, val tasks: List, val error: Throwable? )@

Slide 69

Slide 69 text

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 )@

Slide 70

Slide 70 text

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 )@

Slide 71

Slide 71 text

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) } }

Slide 72

Slide 72 text

New State Result Default State

Slide 73

Slide 73 text

New State REDUCER Result Default State

Slide 74

Slide 74 text

New State REDUCER Result Previous State

Slide 75

Slide 75 text

intents // Observable .map { intent -> actionFromIntent(intent) } // Observable .compose(actionProcessor) // Observable .scan(TasksViewState.default(), reducer) // Observable

Slide 76

Slide 76 text

val reducer = BiFunction { previousState: TasksViewState, result: TasksResult -> }e

Slide 77

Slide 77 text

val reducer = BiFunction { previousState: TasksViewState, result: TasksResult -> }e

Slide 78

Slide 78 text

val reducer = BiFunction { previousState: TasksViewState, result: TasksResult -> when (result)_{ is LoadTasksResult -> /***/ is LoadAndFilterTasksResult -> /***/ is CompleteTaskResult -> /***/ is ActivateTaskResult -> /***/ is ClearCompletedTasksResult -> /***/ }d }e

Slide 79

Slide 79 text

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

Slide 80

Slide 80 text

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

Slide 81

Slide 81 text

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

Slide 82

Slide 82 text

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

Slide 83

Slide 83 text

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

Slide 84

Slide 84 text

USER INTENTS Intent Result Action State INTENT INTERPRETOR REDUCER PROCESSOR REPOSITORY

Slide 85

Slide 85 text

intents // Observable .map { intent -> actionFromIntent(intent) } // Observable .compose(actionProcessor) // Observable .scan(TasksViewState.default(), reducer) // Observable

Slide 86

Slide 86 text

intents // Observable .map { intent -> actionFromIntent(intent) } // Observable .compose(actionProcessor) // Observable .scan(TasksViewState.default(), reducer) // Observable .subscribe { state -> render(state) }

Slide 87

Slide 87 text

fun render(state: TasksViewState) { }u

Slide 88

Slide 88 text

fun render(state: TasksViewState) { swipeRefreshLayout.isRefreshing = state.isLoading }u

Slide 89

Slide 89 text

fun render(state: TasksViewState) { swipeRefreshLayout.isRefreshing = state.isLoading if (state.error != null) { showLoadingTasksError() return }a }u

Slide 90

Slide 90 text

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

Slide 91

Slide 91 text

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

Slide 92

Slide 92 text

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

Slide 93

Slide 93 text

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

Slide 94

Slide 94 text

USER INTENTS RENDER Intent Result Action State INTENT INTERPRETOR REDUCER PROCESSOR REPOSITORY

Slide 95

Slide 95 text

effects Yo Dawg, I heard you like side Yo Dawg, I heard you like side effects

Slide 96

Slide 96 text

USER INTENTS RENDER Intent Result Action State INTENT INTERPRETOR REDUCER PROCESSOR REPOSITORY

Slide 97

Slide 97 text

USER INTENTS RENDER Intent Result Action State INTENT INTERPRETOR REDUCER PROCESSOR REPOSITORY

Slide 98

Slide 98 text

USER INTENTS RENDER Intent Result Action State INTENT INTERPRETOR REDUCER PROCESSOR REPOSITORY

Slide 99

Slide 99 text

USER Intent Result Action State INTENT INTERPRETOR REDUCER REPOSITORY INTENTS RENDER PROCESSOR

Slide 100

Slide 100 text

USER INTENTS RENDER Intent Result Action State INTENT INTERPRETOR REDUCER PROCESSOR REPOSITORY Unidirectional data flow

Slide 101

Slide 101 text

USER INTENTS RENDER Intent Result Action State INTENT INTERPRETOR REDUCER PROCESSOR REPOSITORY

Slide 102

Slide 102 text

USER USER INTERFACE INTENTS RENDER Intent Result Action State INTENT INTERPRETOR REDUCER PROCESSOR REPOSITORY

Slide 103

Slide 103 text

USER USER INTERFACE VIEW MODEL INTENTS RENDER Intent Result Action State INTENT INTERPRETOR REDUCER PROCESSOR REPOSITORY

Slide 104

Slide 104 text

interface TasksUi { fun render(state: TasksViewState) fun intents(): Observable }@ interface TasksViewModel { fun processIntents(intents: Observable) fun states(): Observable }@

Slide 105

Slide 105 text

interface TasksUi { fun render(state: TasksViewState) fun intents(): Observable }@ interface TasksViewModel { fun processIntents(intents: Observable) fun states(): Observable }@

Slide 106

Slide 106 text

interface TasksUi { fun render(state: TasksViewState) fun intents(): Observable }@ interface TasksViewModel { fun processIntents(intents: Observable) fun states(): Observable }@

Slide 107

Slide 107 text

Mama Lova

Slide 108

Slide 108 text

User: initialIntent() We: render() User: activateTask(1) User: activateTask(2) User: refresh() Mum: Android: you.onStop()

Slide 109

Slide 109 text

User: initialIntent() We: render() User: activateTask(1) User: activateTask(2) User: refresh() Mum: Android: you.onStop()

Slide 110

Slide 110 text

User: initialIntent() We: render() User: activateTask(1) User: activateTask(2) User: refresh() Mum: Android: you.onStop()

Slide 111

Slide 111 text

User: initialIntent() We: render() User: activateTask(1) User: activateTask(2) User: refresh() Mum: Android: we.onStop()

Slide 112

Slide 112 text

USER USER INTERFACE VIEW MODEL INTENTS RENDER Intent Result Action State INTENT INTERPRETOR REDUCER PROCESSOR REPOSITORY C B A

Slide 113

Slide 113 text

INTENTS RENDER VIEW MODEL Intent Result Action State INTENT INTERPRETOR REDUCER PROCESSOR REPOSITORY B C A USER USER INTERFACE

Slide 114

Slide 114 text

INTENTS RENDER VIEW MODEL Intent Result Action State INTENT INTERPRETOR REDUCER PROCESSOR REPOSITORY USER USER INTERFACE B C A

Slide 115

Slide 115 text

USER USER INTERFACE VIEW MODEL INTENTS RENDER Intent Result Action State INTENT INTERPRETOR REDUCER PROCESSOR REPOSITORY A

Slide 116

Slide 116 text

USER USER INTERFACE VIEW MODEL INTENTS RENDER Intent Result Action State INTENT INTERPRETOR REDUCER PROCESSOR REPOSITORY A

Slide 117

Slide 117 text

Config change everywhere

Slide 118

Slide 118 text

No content

Slide 119

Slide 119 text

USER INTERFACE VIEW MODEL INTENTS RENDER Intent Result Action State INTENT INTERPRETOR REDUCER PROCESSOR REPOSITORY

Slide 120

Slide 120 text

USER INTERFACE VIEW MODEL SOURCE SUBSCRIBER

Slide 121

Slide 121 text

USER INTERFACE VIEW MODEL SOURCE SUBSCRIBER

Slide 122

Slide 122 text

USER INTERFACE VIEW MODEL SOURCE SUBSCRIBER SUBJECT

Slide 123

Slide 123 text

USER INTERFACE VIEW MODEL SOURCE SUBSCRIBER SUBJECT

Slide 124

Slide 124 text

USER INTERFACE VIEW MODEL SOURCE SUBSCRIBER SUBJECT

Slide 125

Slide 125 text

USER INTERFACE VIEW MODEL SOURCE SUBSCRIBER SUBJECT SUBJECT

Slide 126

Slide 126 text

USER INTERFACE VIEW MODEL SOURCE SUBSCRIBER SUBJECT SUBJECT

Slide 127

Slide 127 text

VIEW MODEL SUBJECT SUBJECT

Slide 128

Slide 128 text

USER INTERFACE VIEW MODEL SOURCE SUBSCRIBER SUBJECT SUBJECT

Slide 129

Slide 129 text

class TasksViewModel : ViewModel() { fun processIntents(intents: Observable) { }b fun states(): Observable { }c }e

Slide 130

Slide 130 text

class TasksViewModel : ViewModel() { val intentsSubject: PublishSubject = PublishSubject.create() fun processIntents(intents: Observable) { intents.subscribe(intentsSubject) }b fun states(): Observable { }c }e

Slide 131

Slide 131 text

class TasksViewModel : ViewModel() { val intentsSubject: PublishSubject = PublishSubject.create() val statesSubject: PublishSubject = PublishSubject.create() fun processIntents(intents: Observable) { intents.subscribe(intentsSubject) }b fun states(): Observable { return statesSubject }c }e

Slide 132

Slide 132 text

class TasksViewModel : ViewModel() { val intentsSubject: PublishSubject = PublishSubject.create() val statesSubject: PublishSubject = PublishSubject.create() init { intentsSubject .map { intent -> actionFromIntent(intent) } .compose(actionProcessor) .scan(TasksViewState.default(), reducer) }a fun processIntents(intents: Observable) { intents.subscribe(intentsSubject) }b fun states(): Observable { return statesSubject }c }e

Slide 133

Slide 133 text

class TasksViewModel : ViewModel() { val intentsSubject: PublishSubject = PublishSubject.create() val statesSubject: PublishSubject = PublishSubject.create() init { intentsSubject .map { intent -> actionFromIntent(intent) } .compose(actionProcessor) .scan(TasksViewState.default(), reducer) .subscribe(statesSubject) }a fun processIntents(intents: Observable) { intents.subscribe(intentsSubject) }b fun states(): Observable { return statesSubject }c }e

Slide 134

Slide 134 text

class TasksViewModel : ViewModel() { val intentsSubject: PublishSubject = PublishSubject.create() val statesSubject: PublishSubject = PublishSubject.create() init { intentsSubject .map { intent -> actionFromIntent(intent) } .compose(actionProcessor) .scan(TasksViewState.default(), reducer) .subscribe(statesSubject) }a fun processIntents(intents: Observable) { intents.subscribe(intentsSubject) }b fun states(): Observable { return statesSubject }c }e

Slide 135

Slide 135 text

class TasksFragment : Fragment() { fun intents(): Observable { /***/ } fun render(state: TasksViewState) { /***/ } }d

Slide 136

Slide 136 text

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

Slide 137

Slide 137 text

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

Slide 138

Slide 138 text

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

Slide 139

Slide 139 text

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

Slide 140

Slide 140 text

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 onStop() { disposables.dispose() super.onStop() }c }d

Slide 141

Slide 141 text

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 onStop() { disposables.dispose() super.onStop() }c }d

Slide 142

Slide 142 text

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 onStop() { disposables.dispose() super.onStop() }c }d

Slide 143

Slide 143 text

class TasksFragment fun intents(): Observable { return Observable.merge(initialIntent(), refreshIntent(), completeTaskIntent(), activateTaskIntent(), clearCompletedTaskIntent(), changeFilterIntent()) }@ }@

Slide 144

Slide 144 text

class TasksFragment fun intents(): Observable { return Observable.merge(initialIntent(), refreshIntent(), completeTaskIntent(), activateTaskIntent(), clearCompletedTaskIntent(), changeFilterIntent()) }@ }@ fun actionFromIntent(intent: TasksIntent): TasksAction = when (intent) { is InitialIntent -> LoadAndFilterTasksAction /***/ }@

Slide 145

Slide 145 text

private fun compose(): Observable { return intentsSubject .map { this.actionFromIntent(it) } .compose(actionProcessorHolder.actionProcessor) .scan(TasksViewState.idle(), reducer) }a

Slide 146

Slide 146 text

private fun compose(): Observable { return intentsSubject .scan(initialIntentFilter) .map { this.actionFromIntent(it) } .compose(actionProcessorHolder.actionProcessor) .scan(TasksViewState.idle(), reducer) }a

Slide 147

Slide 147 text

private fun compose(): Observable { return intentsSubject .scan(initialIntentFilter) .map { this.actionFromIntent(it) } .compose(actionProcessorHolder.actionProcessor) .scan(TasksViewState.idle(), reducer) }a private val initialIntentFilter = BiFunction { _: TasksIntent, newIntent: TasksIntent -> }c

Slide 148

Slide 148 text

private fun compose(): Observable { return intentsSubject .scan(initialIntentFilter) .map { this.actionFromIntent(it) } .compose(actionProcessorHolder.actionProcessor) .scan(TasksViewState.idle(), reducer) }a private val initialIntentFilter = BiFunction { _: TasksIntent, newIntent: TasksIntent -> if (newIntent is TasksIntent.InitialIntent) { TasksIntent.GetLastState }_ }c

Slide 149

Slide 149 text

private fun compose(): Observable { return intentsSubject .scan(initialIntentFilter) .map { this.actionFromIntent(it) } .compose(actionProcessorHolder.actionProcessor) .scan(TasksViewState.idle(), reducer) }a private val initialIntentFilter = BiFunction { _: TasksIntent, newIntent: TasksIntent -> if (newIntent is TasksIntent.InitialIntent) { TasksIntent.GetLastState }_else { newIntent }b }c

Slide 150

Slide 150 text

private fun compose(): Observable { return intentsSubject .scan(initialIntentFilter) .map { this.actionFromIntent(it) } .compose(actionProcessorHolder.actionProcessor) .scan(TasksViewState.idle(), reducer) }a private val initialIntentFilter = BiFunction { _: TasksIntent, newIntent: TasksIntent -> if (newIntent is TasksIntent.InitialIntent) { TasksIntent.GetLastState }_else { newIntent }b }c

Slide 151

Slide 151 text

Do you even test?

Slide 152

Slide 152 text

USER INTERFACE VIEW MODEL INTENTS RENDER Intent Result Action State INTENT INTERPRETOR REDUCER PROCESSOR REPOSITORY

Slide 153

Slide 153 text

USER INTERFACE VIEW MODEL INTENTS RENDER Intent Result Action State TEST OBSERVER SUBJECT PROCESSOR REPOSITORY

Slide 154

Slide 154 text

USER INTERFACE VIEW MODEL INTENTS RENDER Intent Result Action State INTENT INTERPRETOR REDUCER PROCESSOR REPOSITORY

Slide 155

Slide 155 text

USER INTERFACE VIEW MODEL SUBJECT TEST OBSERVER Intent Result Action State INTENT INTERPRETOR REDUCER PROCESSOR REPOSITORY

Slide 156

Slide 156 text

USER INTERFACE VIEW MODEL INTENTS RENDER Intent Result Action State INTENT INTERPRETOR REDUCER PROCESSOR REPOSITORY

Slide 157

Slide 157 text

USER INTERFACE VIEW MODEL INTENTS RENDER Intent Result Action State INTENT INTERPRETOR REDUCER PROCESSOR REPOSITORY

Slide 158

Slide 158 text

USER INTERFACE VIEW MODEL INTENTS RENDER Intent Result Action State INTENT INTERPRETOR REDUCER PROCESSOR REPOSITORY

Slide 159

Slide 159 text

Action Load and Filter Tasks Logic Clear Completed Task Logic Complete Task Logic Activate Task Logic Load Tasks Logic Result PROCESSOR

Slide 160

Slide 160 text

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

Slide 161

Slide 161 text

No content

Slide 162

Slide 162 text

Fin Benoît Quenaudon @oldergod