address review: signal transient dismissal with an event flow, not an int

An Int counter was already rejected for the now-playing launch signal; use
a broadcast Flow on the shared ContextMenuHost and collect it, so the
dismissal is an event rather than an ever-increasing number.

app/src/main/kotlin/com/subtracks/ui/AppRoot.kt

@@ -402,13 +402,13 @@ private fun MainNavigation() {
                             onOpenLicenses = { navController.navigate(Routes.LICENSES) },
                             onEditServer = { id -> navController.navigate(Routes.editServer(id)) },
                             onBack = { navController.popBackStack() },
-                            dismissRequests = contextMenuHost.dismissRequests,
+                            dismissals = contextMenuHost.dismissals,
                         )
                     }
                     composable(Routes.DOWNLOADS) {
                         DownloadsRoute(
                             onBack = { navController.popBackStack() },
-                            dismissRequests = contextMenuHost.dismissRequests,
+                            dismissals = contextMenuHost.dismissals,
                         )
                     }
                     composable(Routes.SEARCH) {
@@ -607,7 +607,7 @@ private fun MainNavigation() {
                         AddSourceRoute(
                             onSaved = { navController.popBackStack() },
                             onBack = { navController.popBackStack() },
-                            dismissRequests = contextMenuHost.dismissRequests,
+                            dismissals = contextMenuHost.dismissals,
                         )
                     }
                     composable(
@@ -618,7 +618,7 @@ private fun MainNavigation() {
                             onSaved = { navController.popBackStack() },
                             onBack = { navController.popBackStack() },
                             sourceId = entry.arguments?.getLong("sourceId"),
-                            dismissRequests = contextMenuHost.dismissRequests,
+                            dismissals = contextMenuHost.dismissals,
                         )
                     }
                 }

app/src/main/kotlin/com/subtracks/ui/components/ItemContextMenu.kt

@@ -34,7 +34,6 @@ import androidx.compose.material3.rememberModalBottomSheetState
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
-import androidx.compose.runtime.mutableIntStateOf
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.rememberCoroutineScope
@@ -57,6 +56,9 @@ import com.subtracks.data.model.QueueKind
 import com.subtracks.data.model.SongDownload
 import com.subtracks.data.source.StarType
 import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.flow.asSharedFlow
 import kotlinx.coroutines.launch
 import com.subtracks.data.model.Album as AlbumModel
 import com.subtracks.data.model.Artist as ArtistModel
@@ -149,10 +151,11 @@ class ContextMenuHost {
     var actions by mutableStateOf(ItemActions())
         private set
 
-    // Bumped when an external event (opening now playing) should close menu-like UI the host does
+    private val transientDismissals = MutableSharedFlow<Unit>(extraBufferCapacity = 1)
+
+    // Fires when an external event (opening now playing) should close menu-like UI the host does
     // not own, such as the library's list options sheet.
-    var dismissRequests by mutableIntStateOf(0)
-        private set
+    val dismissals: Flow<Unit> = transientDismissals.asSharedFlow()
 
     fun show(
         target: MenuTarget,
@@ -169,17 +172,17 @@ class ContextMenuHost {
 
     fun dismissTransients() {
         dismiss()
-        dismissRequests++
+        transientDismissals.tryEmit(Unit)
     }
 }
 
 @Composable
 internal fun DismissOnRequest(
-    dismissRequests: Int,
+    dismissals: Flow<Unit>,
     onDismiss: () -> Unit,
 ) {
-    LaunchedEffect(dismissRequests) {
-        if (dismissRequests > 0) onDismiss()
+    LaunchedEffect(dismissals) {
+        dismissals.collect { onDismiss() }
     }
 }
 

app/src/main/kotlin/com/subtracks/ui/downloads/DownloadsScreen.kt

@@ -51,6 +51,8 @@ import com.subtracks.data.model.DownloadedSong
 import com.subtracks.ui.components.DeleteDownloadsDialog
 import com.subtracks.ui.components.DismissOnRequest
 import com.subtracks.ui.components.EmptyState
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.emptyFlow
 import org.koin.compose.viewmodel.koinViewModel
 
 sealed interface DownloadDeleteTarget {
@@ -71,12 +73,12 @@ sealed interface DownloadDeleteTarget {
 @Composable
 fun DownloadsRoute(
     onBack: () -> Unit,
-    dismissRequests: Int = 0,
+    dismissals: Flow<Unit> = emptyFlow(),
     viewModel: DownloadsViewModel = koinViewModel(),
 ) {
     val tree by viewModel.tree.collectAsStateWithLifecycle()
     var pending by remember { mutableStateOf<DownloadDeleteTarget?>(null) }
-    DismissOnRequest(dismissRequests) { pending = null }
+    DismissOnRequest(dismissals) { pending = null }
     DownloadsScreen(
         tree = tree,
         loadEncoding = viewModel::encoding,

app/src/main/kotlin/com/subtracks/ui/library/AlbumDetailScreen.kt

@@ -46,6 +46,7 @@ import com.subtracks.ui.components.ItemActions
 import com.subtracks.ui.components.MenuTarget
 import com.subtracks.ui.theme.ArtworkColors
 import com.subtracks.ui.theme.rememberArtworkColors
+import kotlinx.coroutines.flow.emptyFlow
 import kotlinx.coroutines.launch
 import org.koin.compose.koinInject
 import org.koin.compose.viewmodel.koinViewModel
@@ -74,7 +75,7 @@ fun AlbumDetailRoute(
     CloseWhenDownloadsGone(downloadStatus.downloaded, offline, onBack)
     val scope = rememberCoroutineScope()
     var pendingDelete by remember { mutableStateOf<Long?>(null) }
-    DismissOnRequest(contextMenuHost?.dismissRequests ?: 0) { pendingDelete = null }
+    DismissOnRequest(contextMenuHost?.dismissals ?: emptyFlow()) { pendingDelete = null }
     val playback by playbackController.state.collectAsStateWithLifecycle()
     val context = playback.context
     val shortcutArt = remember(coverArtId) { coverArtId?.let { viewModel.coverArt(it, true) } }

app/src/main/kotlin/com/subtracks/ui/library/ArtistDetailScreen.kt

@@ -105,6 +105,7 @@ import com.subtracks.ui.theme.baseArtworkColors
 import com.subtracks.ui.theme.heroBarColor
 import com.subtracks.ui.theme.rememberArtworkColors
 import com.subtracks.ui.theme.rememberOverlaidNameBusy
+import kotlinx.coroutines.flow.emptyFlow
 import kotlinx.coroutines.launch
 import org.koin.compose.koinInject
 import org.koin.compose.viewmodel.koinViewModel
@@ -160,7 +161,7 @@ fun ArtistDetailRoute(
     val albumDownloads by viewModel.albumDownloads.collectAsStateWithLifecycle()
     val scope = rememberCoroutineScope()
     var pendingDelete by remember { mutableStateOf<PendingDownloadDelete?>(null) }
-    DismissOnRequest(contextMenuHost?.dismissRequests ?: 0) { pendingDelete = null }
+    DismissOnRequest(contextMenuHost?.dismissals ?: emptyFlow()) { pendingDelete = null }
     val shortcutArt = remember(coverArtId) { coverArtId?.let { viewModel.coverArt(it, true) } }
     val actions =
         ItemActions(

app/src/main/kotlin/com/subtracks/ui/library/LibraryScreen.kt

@@ -134,6 +134,7 @@ import com.subtracks.ui.theme.librarySurfaceColor
 import com.subtracks.ui.theme.playerSurfaceColor
 import com.subtracks.ui.theme.rememberArtworkColors
 import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.emptyFlow
 import kotlinx.coroutines.launch
 import org.koin.compose.koinInject
 import org.koin.compose.viewmodel.koinViewModel
@@ -270,7 +271,7 @@ fun LibraryRoute(
     val downloads = downloadsState?.value ?: emptyMap()
     val scope = rememberCoroutineScope()
     var pendingDelete by remember { mutableStateOf<PendingDownloadDelete?>(null) }
-    DismissOnRequest(contextMenuHost?.dismissRequests ?: 0) { pendingDelete = null }
+    DismissOnRequest(contextMenuHost?.dismissals ?: emptyFlow()) { pendingDelete = null }
     val itemActions =
         ItemActions(
             playNext = { playbackController.playNext(it.sourceId, it.kind, it.refId) },
@@ -341,7 +342,7 @@ fun LibraryRoute(
         albumDownloads = downloads.takeIf { listTab == LibraryListTab.Albums }.orEmpty(),
         artistDownloads = downloads.takeIf { listTab == LibraryListTab.Artists }.orEmpty(),
         playlistDownloads = downloads.takeIf { listTab == LibraryListTab.Playlists }.orEmpty(),
-        dismissRequests = contextMenuHost?.dismissRequests ?: 0,
+        dismissals = contextMenuHost?.dismissals ?: emptyFlow(),
         homeContent = { topInset, bottomInset ->
             HomeRoute(
                 onAlbumClick = onAlbumClick,
@@ -406,7 +407,7 @@ fun LibraryScreen(
     albumDownloads: Map<String, ListDownloadStatus> = emptyMap(),
     artistDownloads: Map<String, ListDownloadStatus> = emptyMap(),
     playlistDownloads: Map<String, ListDownloadStatus> = emptyMap(),
-    dismissRequests: Int = 0,
+    dismissals: Flow<Unit> = emptyFlow(),
     homeContent: @Composable (topInset: Dp, bottomInset: Dp) -> Unit = { _, _ -> },
     modifier: Modifier = Modifier,
 ) {
@@ -419,7 +420,7 @@ fun LibraryScreen(
     var searchActive by rememberSaveable { mutableStateOf(false) }
     val searchFocus = remember { FocusRequester() }
 
-    DismissOnRequest(dismissRequests) { showOptions = false }
+    DismissOnRequest(dismissals) { showOptions = false }
 
     LaunchedEffect(pagerState) {
         snapshotFlow { pagerState.settledPage }.collect { page ->

app/src/main/kotlin/com/subtracks/ui/library/PlaylistDetailScreen.kt

@@ -35,6 +35,7 @@ import com.subtracks.ui.components.ItemActions
 import com.subtracks.ui.components.MenuTarget
 import com.subtracks.ui.theme.ArtworkColors
 import com.subtracks.ui.theme.rememberArtworkColors
+import kotlinx.coroutines.flow.emptyFlow
 import kotlinx.coroutines.launch
 import org.koin.compose.koinInject
 import org.koin.compose.viewmodel.koinViewModel
@@ -61,7 +62,7 @@ fun PlaylistDetailRoute(
     CloseWhenDownloadsGone(downloadStatus.downloaded, offline, onBack)
     val scope = rememberCoroutineScope()
     var pendingDelete by remember { mutableStateOf<Long?>(null) }
-    DismissOnRequest(contextMenuHost?.dismissRequests ?: 0) { pendingDelete = null }
+    DismissOnRequest(contextMenuHost?.dismissals ?: emptyFlow()) { pendingDelete = null }
     val playback by playbackController.state.collectAsStateWithLifecycle()
     val context = playback.context
     val requestDownloadAction: (BulkDownloadAction) -> Unit = { action ->

app/src/main/kotlin/com/subtracks/ui/settings/AddSourceScreen.kt

@@ -48,6 +48,8 @@ import androidx.compose.ui.unit.dp
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import com.subtracks.R
 import com.subtracks.ui.components.DismissOnRequest
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.emptyFlow
 import org.koin.compose.viewmodel.koinViewModel
 import org.koin.core.parameter.parametersOf
 
@@ -56,7 +58,7 @@ fun AddSourceRoute(
     onSaved: () -> Unit,
     onBack: (() -> Unit)?,
     sourceId: Long? = null,
-    dismissRequests: Int = 0,
+    dismissals: Flow<Unit> = emptyFlow(),
     viewModel: AddSourceViewModel = koinViewModel(key = sourceId?.toString() ?: "new") { parametersOf(sourceId) },
 ) {
     val state by viewModel.state.collectAsStateWithLifecycle()
@@ -71,7 +73,7 @@ fun AddSourceRoute(
         onSave = { viewModel.save(onSaved) },
         onDelete = { viewModel.delete(onSaved) },
         onBack = onBack,
-        dismissRequests = dismissRequests,
+        dismissals = dismissals,
     )
 }
 
@@ -88,13 +90,13 @@ fun AddSourceScreen(
     onSave: () -> Unit,
     onDelete: () -> Unit,
     onBack: (() -> Unit)?,
-    dismissRequests: Int = 0,
+    dismissals: Flow<Unit> = emptyFlow(),
     modifier: Modifier = Modifier,
 ) {
     val nameFocus = remember { FocusRequester() }
     val addressFocus = remember { FocusRequester() }
     var confirmingDelete by remember { mutableStateOf(false) }
-    DismissOnRequest(dismissRequests) { confirmingDelete = false }
+    DismissOnRequest(dismissals) { confirmingDelete = false }
     LaunchedEffect(state.nameError, state.addressError) {
         when {
             state.nameError -> nameFocus.requestFocus()

app/src/main/kotlin/com/subtracks/ui/settings/SettingsScreen.kt

@@ -58,6 +58,8 @@ import com.subtracks.data.model.Source
 import com.subtracks.data.prefs.StreamQuality
 import com.subtracks.ui.components.DismissOnRequest
 import com.subtracks.ui.components.rememberViewportFill
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.emptyFlow
 import org.koin.compose.viewmodel.koinViewModel
 
 private val bitrateOptions = listOf(0, 24, 32, 64, 96, 128, 192, 256, 320)
@@ -72,7 +74,7 @@ fun SettingsRoute(
     onOpenLicenses: () -> Unit,
     onEditServer: (Long) -> Unit,
     onBack: () -> Unit,
-    dismissRequests: Int = 0,
+    dismissals: Flow<Unit> = emptyFlow(),
     viewModel: SettingsViewModel = koinViewModel(),
 ) {
     val sources by viewModel.sources.collectAsStateWithLifecycle()
@@ -107,7 +109,7 @@ fun SettingsRoute(
         onOpenDownloads = onOpenDownloads,
         onOpenLicenses = onOpenLicenses,
         onBack = onBack,
-        dismissRequests = dismissRequests,
+        dismissals = dismissals,
     )
 }
 
@@ -136,11 +138,11 @@ fun SettingsScreen(
     onOpenDownloads: () -> Unit,
     onOpenLicenses: () -> Unit,
     onBack: () -> Unit,
-    dismissRequests: Int = 0,
+    dismissals: Flow<Unit> = emptyFlow(),
     modifier: Modifier = Modifier,
 ) {
     var dialog by remember { mutableStateOf<SettingsDialog?>(null) }
-    DismissOnRequest(dismissRequests) { dialog = null }
+    DismissOnRequest(dismissals) { dialog = null }
     val listState = rememberLazyListState()
     val fill = rememberViewportFill(listState)
 

app/src/test/kotlin/com/subtracks/ui/LibraryOptionsTest.kt

@@ -119,7 +119,7 @@ class LibraryOptionsTest {
                     onOpenSettings = {},
                     sortOptions = sortOptionsFor(LibraryTab.Albums),
                     starredSupported = true,
-                    dismissRequests = host.dismissRequests,
+                    dismissals = host.dismissals,
                 )
             }
         }