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Introduce FeedScreenState to separate UI related logic, state and UI #753
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takahirom
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82 changes: 82 additions & 0 deletions
82
uicomponent-compose/feed/src/main/java/io/github/droidkaigi/feeder/feed/FeedScreenState.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,82 @@ | ||
| package io.github.droidkaigi.feeder.feed | ||
|
|
||
| import android.content.Context | ||
| import androidx.compose.foundation.lazy.rememberLazyListState | ||
| import androidx.compose.material.BackdropScaffoldState | ||
| import androidx.compose.material.BackdropValue | ||
| import androidx.compose.material.ExperimentalMaterialApi | ||
| import androidx.compose.material.SnackbarResult | ||
| import androidx.compose.material.rememberBackdropScaffoldState | ||
| import androidx.compose.runtime.Composable | ||
| import androidx.compose.runtime.remember | ||
| import androidx.compose.ui.platform.LocalContext | ||
| import io.github.droidkaigi.feeder.FeedItem | ||
| import io.github.droidkaigi.feeder.Filters | ||
| import io.github.droidkaigi.feeder.core.dispatcher | ||
| import io.github.droidkaigi.feeder.core.getReadableMessage | ||
| import io.github.droidkaigi.feeder.core.state | ||
| import kotlinx.coroutines.flow.Flow | ||
|
|
||
| @OptIn(ExperimentalMaterialApi::class) | ||
| class FeedScreenState( | ||
| private val feedViewModel: FeedViewModel, | ||
| private val fmPlayerViewModel: FmPlayerViewModel, | ||
| val scaffoldState: BackdropScaffoldState, | ||
| val context: Context, | ||
| ) { | ||
| val uiState: FeedViewModel.State @Composable get() = feedViewModel.state() | ||
| private val dispatcher: (FeedViewModel.Event) -> Unit get() = feedViewModel.dispatcher() | ||
| val effect: Flow<FeedViewModel.Effect> get() = feedViewModel.effect | ||
|
|
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| val fmPlayerUiState: FmPlayerViewModel.State @Composable get() = fmPlayerViewModel.state() | ||
| private val fmPlayerDispatcher: (FmPlayerViewModel.Event) -> Unit | ||
| get() = fmPlayerViewModel.dispatcher() | ||
|
|
||
| val tabLazyListStates | ||
| @Composable get() = FeedTab.values() | ||
| .map { it to rememberLazyListState() } | ||
| .toMap() | ||
|
|
||
| suspend fun onErrorMessage(effect: FeedViewModel.Effect.ErrorMessage) { | ||
| when ( | ||
| scaffoldState.snackbarHostState.showSnackbar( | ||
| message = effect.appError.getReadableMessage(context), | ||
| actionLabel = "Reload", | ||
| ) | ||
| ) { | ||
| SnackbarResult.ActionPerformed -> { | ||
| dispatcher(FeedViewModel.Event.ReloadContent) | ||
| } | ||
| SnackbarResult.Dismissed -> { | ||
| } | ||
| } | ||
| } | ||
|
|
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| fun onFavoriteChange(feedItem: FeedItem) { | ||
| dispatcher(FeedViewModel.Event.ToggleFavorite(feedItem = feedItem)) | ||
| } | ||
|
|
||
| fun onFavoriteFilterChange(currentFilters: Filters, isFavoriteFiltered: Boolean) { | ||
| dispatcher( | ||
| FeedViewModel.Event.ChangeFavoriteFilter( | ||
| filters = currentFilters.copy(filterFavorite = isFavoriteFiltered) | ||
|
|
||
| ) | ||
| ) | ||
| } | ||
|
|
||
| fun onPotcastPlayButtonClick(podcast: FeedItem.Podcast) { | ||
| fmPlayerDispatcher(FmPlayerViewModel.Event.ChangePlayerState(podcast.podcastLink)) | ||
| } | ||
| } | ||
|
|
||
| @OptIn(ExperimentalMaterialApi::class) | ||
| @Composable | ||
| fun rememberFeedScreenState( | ||
| feedViewModel: FeedViewModel = feedViewModel(), | ||
| fmPlayerViewModel: FmPlayerViewModel = fmPlayerViewModel(), | ||
| scaffoldState: BackdropScaffoldState = rememberBackdropScaffoldState(BackdropValue.Concealed), | ||
| context: Context = LocalContext.current, | ||
| ): FeedScreenState = remember { | ||
| FeedScreenState(feedViewModel, fmPlayerViewModel, scaffoldState, context) | ||
| } |
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[spotless] reported by reviewdog 🐶