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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,153 +1,67 @@ | ||
| package id.gdg.app | ||
|
|
||
| import androidx.lifecycle.ViewModel | ||
| import androidx.lifecycle.viewModelScope | ||
| import id.gdg.app.update.ChapterEventUpdate | ||
| import id.gdg.app.update.ChapterUpdate | ||
| import id.gdg.app.update.EventDetailUpdate | ||
| import id.gdg.app.common.Update | ||
| import id.gdg.app.common.UpdateableViewModel | ||
| import id.gdg.app.ui.AppEvent | ||
| import id.gdg.app.ui.state.ChapterUiModel | ||
| import id.gdg.app.ui.state.AppUiModel | ||
| import id.gdg.app.ui.state.EventDetailUiModel | ||
| import id.gdg.app.ui.state.common.UiState | ||
| import id.gdg.app.ui.state.common.asUiState | ||
| import id.gdg.app.ui.state.partial.PreviousEventsUiModel | ||
| import id.gdg.app.ui.state.partial.UpcomingEventUiModel | ||
| import id.gdg.chapter.domain.GetChapterIdUseCase | ||
| import id.gdg.chapter.domain.GetChapterListUseCase | ||
| import id.gdg.chapter.domain.SetChapterIdUseCase | ||
| import id.gdg.event.domain.GetEventDetailUseCase | ||
| import id.gdg.event.domain.GetPreviousEventUseCase | ||
| import id.gdg.event.domain.GetUpcomingEventUseCase | ||
| import kotlinx.coroutines.Dispatchers | ||
| import kotlinx.coroutines.flow.MutableSharedFlow | ||
| import kotlinx.coroutines.flow.MutableStateFlow | ||
| import kotlinx.coroutines.flow.SharingStarted | ||
| import kotlinx.coroutines.flow.StateFlow | ||
| import kotlinx.coroutines.flow.asStateFlow | ||
| import kotlinx.coroutines.flow.combine | ||
| import kotlinx.coroutines.flow.stateIn | ||
| import kotlinx.coroutines.flow.update | ||
| import kotlinx.coroutines.launch | ||
| import kotlinx.coroutines.withContext | ||
|
|
||
| class AppViewModel( | ||
| // Chapters | ||
| private val chapterListUseCase: GetChapterListUseCase, | ||
| private val getCurrentChapterUseCase: GetChapterIdUseCase, | ||
| private val setCurrentChapterUseCase: SetChapterIdUseCase, | ||
|
|
||
| // Events | ||
| private val upcomingEventUseCase: GetUpcomingEventUseCase, | ||
| private val previousEventUseCase: GetPreviousEventUseCase, | ||
| private val eventDetailUseCase: GetEventDetailUseCase, | ||
| ) : ViewModel() { | ||
|
|
||
| private var currentChapterId = 0 | ||
|
|
||
| private var _action = MutableSharedFlow<AppEvent>(replay = 50) | ||
|
|
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| private var _upcomingEvent = MutableStateFlow(UpcomingEventUiModel.Empty) | ||
| private var _previousEvents = MutableStateFlow(PreviousEventsUiModel.Empty) | ||
|
|
||
| val chapterList get() = chapterListUseCase() | ||
|
|
||
| val chapterUiState: StateFlow<ChapterUiModel> = combine( | ||
| _upcomingEvent, | ||
| _previousEvents | ||
| ) { upcoming, previous -> | ||
| ChapterUiModel(upcoming, previous) | ||
| private val chapterUpdate: ChapterUpdate, | ||
| private val chapterEventUpdate: ChapterEventUpdate, | ||
| private val eventDetailUpdate: EventDetailUpdate | ||
| ) : UpdateableViewModel() { | ||
|
|
||
| val uiState: StateFlow<AppUiModel> = combine( | ||
| chapterUpdate.chapterUiState, | ||
| chapterEventUpdate.eventsUiState | ||
| ) { chapters, events -> | ||
| AppUiModel( | ||
| eventUiState = events, | ||
| chapterUiState = chapters | ||
| ) | ||
| }.stateIn( | ||
| viewModelScope, | ||
| SharingStarted.WhileSubscribed(5_000), | ||
| ChapterUiModel.Default | ||
| AppUiModel() | ||
| ) | ||
|
|
||
| private var _eventDetailUiState = MutableStateFlow(EventDetailUiModel.Empty) | ||
| val eventDetailUiState get() = _eventDetailUiState.asStateFlow() | ||
|
|
||
| init { | ||
| observeOnChapterIdChanged() | ||
|
|
||
| viewModelScope.launch { | ||
| _action.collect(::observeActionEvent) | ||
| } | ||
| } | ||
|
|
||
| fun sendEvent(event: AppEvent) { | ||
| _action.tryEmit(event) | ||
| } | ||
|
|
||
| private fun observeOnChapterIdChanged() { | ||
| viewModelScope.launch { | ||
| getCurrentChapterUseCase() | ||
| .collect { | ||
| val chapterId = it ?: return@collect | ||
| currentChapterId = chapterId | ||
| } | ||
| } | ||
| } | ||
| val eventDetailUiState = eventDetailUpdate.eventDetailUiState | ||
| .stateIn( | ||
| viewModelScope, | ||
| SharingStarted.WhileSubscribed(5_000), | ||
| EventDetailUiModel.Empty | ||
| ) | ||
|
|
||
| private fun observeActionEvent(action: AppEvent) { | ||
| when (action) { | ||
| is AppEvent.ChangeChapterId -> shouldChangeCurrentChapterId(action.chapterId) | ||
| is AppEvent.InitialContent -> { | ||
| sendEvent(AppEvent.FetchPreviousEvent) | ||
| sendEvent(AppEvent.FetchUpcomingEvent) | ||
| } | ||
|
|
||
| is AppEvent.FetchPreviousEvent -> fetchPreviousEvent(currentChapterId) | ||
| is AppEvent.FetchUpcomingEvent -> fetchUpcomingEvents(currentChapterId) | ||
| is AppEvent.EventDetail -> fetchEventDetail(action.eventId) | ||
| } | ||
| } | ||
|
|
||
| private fun shouldChangeCurrentChapterId(chapterId: Int) { | ||
| viewModelScope.launch { | ||
| setCurrentChapterUseCase(chapterId) | ||
| } | ||
| } | ||
|
|
||
| private fun fetchPreviousEvent(chapterId: Int) { | ||
| _previousEvents.update { it.copy(state = UiState.Loading) } | ||
|
|
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| viewModelScope.launch { | ||
| val result = previousEventUseCase(chapterId) | ||
| private var _action = MutableSharedFlow<AppEvent>(replay = 50) | ||
|
|
||
| _previousEvents.update { | ||
| it.copy( | ||
| state = result.asUiState(), | ||
| previousEvents = result.getOrNull() ?: emptyList() | ||
| ) | ||
| } | ||
| } | ||
| override fun updates(): List<Update> { | ||
| return listOf( | ||
| chapterUpdate, | ||
| chapterEventUpdate, | ||
| eventDetailUpdate | ||
| ) | ||
| } | ||
|
|
||
| private fun fetchUpcomingEvents(chapterId: Int) { | ||
| _upcomingEvent.update { it.copy(state = UiState.Loading) } | ||
| init { | ||
| setupLoop() | ||
|
|
||
| viewModelScope.launch { | ||
| val result = upcomingEventUseCase(chapterId) | ||
|
|
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| _upcomingEvent.update { | ||
| it.copy( | ||
| state = result.asUiState(), | ||
| upcomingEvent = result.getOrNull() | ||
| ) | ||
| } | ||
| _action.collect(::eventHandlers) | ||
| } | ||
| } | ||
|
|
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| private fun fetchEventDetail(eventId: Int) { | ||
| _eventDetailUiState.update { it.copy(state = UiState.Loading) } | ||
|
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| viewModelScope.launch { | ||
| val result = eventDetailUseCase(eventId) | ||
|
|
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| withContext(Dispatchers.Main) { | ||
| _eventDetailUiState.update { | ||
| it.copy( | ||
| state = result.asUiState(), | ||
| detail = result.getOrNull() | ||
| ) | ||
| } | ||
| } | ||
| } | ||
| fun sendEvent(event: AppEvent) { | ||
| _action.tryEmit(event) | ||
| } | ||
| } |
2 changes: 1 addition & 1 deletion
2
...lin/id/gdg/app/ui/state/common/UiState.kt → ...nMain/kotlin/id/gdg/app/common/UiState.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| package id.gdg.app.common | ||
|
|
||
| import id.gdg.app.ui.AppEvent | ||
| import kotlinx.coroutines.CoroutineScope | ||
| import kotlinx.coroutines.Dispatchers | ||
| import kotlinx.coroutines.SupervisorJob | ||
| import kotlinx.coroutines.cancel | ||
| import kotlin.coroutines.CoroutineContext | ||
| import kotlin.coroutines.EmptyCoroutineContext | ||
|
|
||
| interface Update { | ||
|
|
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| fun handleEvent(event: AppEvent) | ||
| } | ||
|
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| @OptIn(ExperimentalStdlibApi::class) | ||
| interface UpdateScope : AutoCloseable { | ||
|
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| val scope: CoroutineScope | ||
|
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| fun shouldUseViewModelScope(scope: CoroutineScope) | ||
| } | ||
|
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| class MainUpdateScope : UpdateScope, CoroutineScope { | ||
|
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| private var viewModelScope: CoroutineScope? = null | ||
|
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| override val coroutineContext: CoroutineContext | ||
| get() = try { | ||
| Dispatchers.Main.immediate | ||
| } catch (_: NotImplementedError) { | ||
| EmptyCoroutineContext | ||
| } catch (_: IllegalStateException) { | ||
| EmptyCoroutineContext | ||
| } + SupervisorJob() | ||
|
|
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| override val scope: CoroutineScope | ||
| get() = viewModelScope ?: this | ||
|
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| override fun shouldUseViewModelScope(scope: CoroutineScope) { | ||
| viewModelScope = scope | ||
| } | ||
|
|
||
| override fun close() { | ||
| coroutineContext.cancel() | ||
| } | ||
| } |
23 changes: 23 additions & 0 deletions
23
app/src/commonMain/kotlin/id/gdg/app/common/UpdateableViewModel.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,23 @@ | ||
| package id.gdg.app.common | ||
|
|
||
| import androidx.lifecycle.ViewModel | ||
| import androidx.lifecycle.viewModelScope | ||
| import id.gdg.app.ui.AppEvent | ||
|
|
||
| @OptIn(ExperimentalStdlibApi::class) | ||
| abstract class UpdateableViewModel() : ViewModel() { | ||
|
|
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| abstract fun updates(): List<Update> | ||
|
|
||
| fun setupLoop() { | ||
| updates() | ||
| .map { it as UpdateScope } | ||
| .map { | ||
| it.shouldUseViewModelScope(viewModelScope) | ||
| addCloseable(it) | ||
| } | ||
| } | ||
|
|
||
| fun eventHandlers(event: AppEvent) = | ||
| updates().forEach { it.handleEvent(event) } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,9 +1,26 @@ | ||
| package id.gdg.app.di | ||
|
|
||
| import id.gdg.app.common.MainUpdateScope | ||
| import id.gdg.app.common.UpdateScope | ||
| import id.gdg.app.update.ChapterEventUpdate | ||
| import id.gdg.app.update.ChapterEventUpdateImpl | ||
| import id.gdg.app.update.ChapterUpdate | ||
| import id.gdg.app.update.ChapterUpdateImpl | ||
| import id.gdg.app.update.EventDetailUpdate | ||
| import id.gdg.app.update.EventDetailUpdateImpl | ||
| import id.gdg.chapter.di.chapterModule | ||
| import id.gdg.event.di.eventModule | ||
| import org.koin.dsl.module | ||
|
|
||
| val updateModule = module { | ||
| single<UpdateScope> { MainUpdateScope() } | ||
| single<ChapterUpdate> { ChapterUpdateImpl(get(), get(), get(), get()) } | ||
| single<EventDetailUpdate> { EventDetailUpdateImpl(get(), get()) } | ||
| single<ChapterEventUpdate> { ChapterEventUpdateImpl(get(), get(), get()) } | ||
| } | ||
|
|
||
| val appModule = listOf( | ||
| updateModule, | ||
| chapterModule, | ||
| eventModule, | ||
| ) |
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