Add ability to sort and filter items in a playlist (#818)

## Description
Add ability to sort and filter items in a playlist. There's a new button
for each added to the playlist details page. Starting playback will run
in the order selected.

The sort and filter are persisted locally per playlist, so returning to
the playlist will remember the previous settings.

Note: playlist playback is still limited to 100 items (#42)

### Related issues
Closes #285

### Testing
Emulator & nvidia shield

## Screenshots
![playlist_sort_filter
Large](https://github.com/user-attachments/assets/9880021b-a1c3-4d8d-ace2-83737f3f772a)

## AI or LLM usage
None

app/src/main/java/com/github/damontecres/wholphin/data/filter/ItemFilterBy.kt

@@ -39,6 +39,17 @@ val DefaultForGenresFilterOptions =
         DecadeFilter,
     )
 
+val DefaultPlaylistItemsOptions =
+    listOf(
+        PlayedFilter,
+        FavoriteFilter,
+        CommunityRatingFilter,
+        OfficialRatingFilter,
+        VideoTypeFilter,
+        YearFilter,
+        DecadeFilter,
+    )
+
 sealed interface ItemFilterBy<T> {
     @get:StringRes
     val stringRes: Int

app/src/main/java/com/github/damontecres/wholphin/services/PlaylistCreator.kt

@@ -17,7 +17,6 @@ import com.github.damontecres.wholphin.ui.toServerString
 import com.github.damontecres.wholphin.util.ApiRequestPager
 import com.github.damontecres.wholphin.util.GetEpisodesRequestHandler
 import com.github.damontecres.wholphin.util.GetItemsRequestHandler
-import com.github.damontecres.wholphin.util.GetPlaylistItemsRequestHandler
 import com.github.damontecres.wholphin.util.TransformList
 import dagger.hilt.android.qualifiers.ApplicationContext
 import kotlinx.coroutines.CoroutineScope
@@ -34,7 +33,6 @@ import org.jellyfin.sdk.model.api.PlaylistUserPermissions
 import org.jellyfin.sdk.model.api.SortOrder
 import org.jellyfin.sdk.model.api.request.GetEpisodesRequest
 import org.jellyfin.sdk.model.api.request.GetItemsRequest
-import org.jellyfin.sdk.model.api.request.GetPlaylistItemsRequest
 import org.jellyfin.sdk.model.serializer.toUUIDOrNull
 import java.util.UUID
 import javax.inject.Inject
@@ -79,19 +77,22 @@ class PlaylistCreator
         suspend fun createFromPlaylistId(
             playlistId: UUID,
             startIndex: Int?,
-            shuffled: Boolean,
+            sortAndDirection: SortAndDirection,
+            filter: GetItemsFilter,
         ): Playlist {
             val request =
-                GetPlaylistItemsRequest(
-                    playlistId = playlistId,
+                filter.applyTo(
+                    GetItemsRequest(
+                        userId = serverRepository.currentUser.value?.id,
+                        parentId = playlistId,
                         fields = DefaultItemFields,
                         startIndex = startIndex,
                         limit = Playlist.MAX_SIZE,
+                        sortBy = listOf(sortAndDirection.sort),
+                        sortOrder = listOf(sortAndDirection.direction),
+                    ),
                 )
-            var items = GetPlaylistItemsRequestHandler.execute(api, request).content.items
-            if (shuffled) {
-                items = items.shuffled()
-            }
+            val items = GetItemsRequestHandler.execute(api, request).content.items
             return Playlist(items.convertAndAddParts(), 0)
         }
 
@@ -206,9 +207,18 @@ class PlaylistCreator
                 BaseItemKind.PLAYLIST -> {
                     PlaylistCreationResult.Success(
                         createFromPlaylistId(
-                            item.id,
-                            startIndex,
-                            shuffled,
+                            playlistId = item.id,
+                            startIndex = startIndex,
+                            sortAndDirection =
+                                if (shuffled) {
+                                    SortAndDirection(ItemSortBy.RANDOM, SortOrder.ASCENDING)
+                                } else {
+                                    sortAndDirection ?: SortAndDirection(
+                                        ItemSortBy.DEFAULT,
+                                        SortOrder.ASCENDING,
+                                    )
+                                },
+                            filter = filter,
                         ),
                     )
                 }

app/src/main/java/com/github/damontecres/wholphin/ui/components/CollectionFolderGrid.kt

@@ -47,18 +47,9 @@ import androidx.tv.material3.Text
 import com.github.damontecres.wholphin.R
 import com.github.damontecres.wholphin.data.LibraryDisplayInfoDao
 import com.github.damontecres.wholphin.data.ServerRepository
-import com.github.damontecres.wholphin.data.filter.CommunityRatingFilter
-import com.github.damontecres.wholphin.data.filter.DecadeFilter
 import com.github.damontecres.wholphin.data.filter.DefaultFilterOptions
-import com.github.damontecres.wholphin.data.filter.FavoriteFilter
 import com.github.damontecres.wholphin.data.filter.FilterValueOption
-import com.github.damontecres.wholphin.data.filter.FilterVideoType
-import com.github.damontecres.wholphin.data.filter.GenreFilter
 import com.github.damontecres.wholphin.data.filter.ItemFilterBy
-import com.github.damontecres.wholphin.data.filter.OfficialRatingFilter
-import com.github.damontecres.wholphin.data.filter.PlayedFilter
-import com.github.damontecres.wholphin.data.filter.VideoTypeFilter
-import com.github.damontecres.wholphin.data.filter.YearFilter
 import com.github.damontecres.wholphin.data.model.BaseItem
 import com.github.damontecres.wholphin.data.model.CollectionFolderFilter
 import com.github.damontecres.wholphin.data.model.GetItemsFilter
@@ -88,6 +79,7 @@ import com.github.damontecres.wholphin.ui.rememberInt
 import com.github.damontecres.wholphin.ui.setValueOnMain
 import com.github.damontecres.wholphin.ui.toServerString
 import com.github.damontecres.wholphin.ui.tryRequestFocus
+import com.github.damontecres.wholphin.ui.util.FilterUtils
 import com.github.damontecres.wholphin.util.ApiRequestPager
 import com.github.damontecres.wholphin.util.DataLoadingState
 import com.github.damontecres.wholphin.util.ExceptionHandler
@@ -103,9 +95,6 @@ import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import org.jellyfin.sdk.api.client.ApiClient
-import org.jellyfin.sdk.api.client.extensions.genresApi
-import org.jellyfin.sdk.api.client.extensions.localizationApi
-import org.jellyfin.sdk.api.client.extensions.yearsApi
 import org.jellyfin.sdk.model.api.BaseItemKind
 import org.jellyfin.sdk.model.api.CollectionType
 import org.jellyfin.sdk.model.api.ImageType
@@ -116,7 +105,6 @@ import org.jellyfin.sdk.model.api.request.GetItemsRequest
 import org.jellyfin.sdk.model.api.request.GetPersonsRequest
 import org.jellyfin.sdk.model.serializer.toUUIDOrNull
 import timber.log.Timber
-import java.util.TreeSet
 import java.util.UUID
 import kotlin.time.Duration
 
@@ -391,79 +379,12 @@ class CollectionFolderViewModel
         }
 
         suspend fun getFilterOptionValues(filterOption: ItemFilterBy<*>): List<FilterValueOption> =
-            try {
-                when (filterOption) {
-                    GenreFilter -> {
-                        api.genresApi
-                            .getGenres(
-                                parentId = itemUuid,
-                                userId = serverRepository.currentUser.value?.id,
-                            ).content.items
-                            .map { FilterValueOption(it.name ?: "", it.id) }
-                    }
-
-                    FavoriteFilter,
-                    PlayedFilter,
-                    -> {
-                        listOf(
-                            FilterValueOption("True", null),
-                            FilterValueOption("False", null),
+            FilterUtils.getFilterOptionValues(
+                api,
+                serverRepository.currentUser.value?.id,
+                itemUuid,
+                filterOption,
             )
-                    }
-
-                    OfficialRatingFilter -> {
-                        api.localizationApi.getParentalRatings().content.map {
-                            FilterValueOption(it.name ?: "", it.value)
-                        }
-                    }
-
-                    VideoTypeFilter -> {
-                        FilterVideoType.entries.map {
-                            FilterValueOption(it.readable, it)
-                        }
-                    }
-
-                    YearFilter -> {
-                        api.yearsApi
-                            .getYears(
-                                parentId = itemUuid,
-                                userId = serverRepository.currentUser.value?.id,
-                                sortBy = listOf(ItemSortBy.SORT_NAME),
-                                sortOrder = listOf(SortOrder.ASCENDING),
-                            ).content.items
-                            .mapNotNull {
-                                it.name?.toIntOrNull()?.let { FilterValueOption(it.toString(), it) }
-                            }
-                    }
-
-                    DecadeFilter -> {
-                        val items = TreeSet<Int>()
-                        api.yearsApi
-                            .getYears(
-                                parentId = itemUuid,
-                                userId = serverRepository.currentUser.value?.id,
-                                sortBy = listOf(ItemSortBy.SORT_NAME),
-                                sortOrder = listOf(SortOrder.ASCENDING),
-                            ).content.items
-                            .mapNotNullTo(items) {
-                                it.name
-                                    ?.toIntOrNull()
-                                    ?.div(10)
-                                    ?.times(10)
-                            }
-                        items.toList().sorted().map { FilterValueOption("$it's", it) }
-                    }
-
-                    CommunityRatingFilter -> {
-                        (1..10).map {
-                            FilterValueOption("$it", it)
-                        }
-                    }
-                }
-            } catch (ex: Exception) {
-                Timber.e(ex, "Exception get filter value options for $filterOption")
-                listOf()
-            }
 
         suspend fun positionOfLetter(letter: Char): Int? =
             withContext(Dispatchers.IO) {

app/src/main/java/com/github/damontecres/wholphin/ui/detail/PlaylistDetails.kt

@@ -2,6 +2,7 @@ package com.github.damontecres.wholphin.ui.detail
 
 import androidx.compose.foundation.background
 import androidx.compose.foundation.focusGroup
+import androidx.compose.foundation.focusable
 import androidx.compose.foundation.interaction.MutableInteractionSource
 import androidx.compose.foundation.interaction.collectIsFocusedAsState
 import androidx.compose.foundation.layout.Arrangement
@@ -22,7 +23,9 @@ import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.ArrowForward
 import androidx.compose.material.icons.filled.PlayArrow
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.Immutable
 import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.livedata.observeAsState
 import androidx.compose.runtime.mutableIntStateOf
@@ -49,7 +52,14 @@ import androidx.tv.material3.MaterialTheme
 import androidx.tv.material3.Text
 import androidx.tv.material3.surfaceColorAtElevation
 import com.github.damontecres.wholphin.R
+import com.github.damontecres.wholphin.data.LibraryDisplayInfoDao
+import com.github.damontecres.wholphin.data.ServerRepository
+import com.github.damontecres.wholphin.data.filter.DefaultPlaylistItemsOptions
+import com.github.damontecres.wholphin.data.filter.FilterValueOption
+import com.github.damontecres.wholphin.data.filter.ItemFilterBy
 import com.github.damontecres.wholphin.data.model.BaseItem
+import com.github.damontecres.wholphin.data.model.GetItemsFilter
+import com.github.damontecres.wholphin.data.model.LibraryDisplayInfo
 import com.github.damontecres.wholphin.services.BackdropService
 import com.github.damontecres.wholphin.services.NavigationManager
 import com.github.damontecres.wholphin.ui.DefaultItemFields
@@ -61,26 +71,39 @@ import com.github.damontecres.wholphin.ui.components.DialogPopup
 import com.github.damontecres.wholphin.ui.components.ErrorMessage
 import com.github.damontecres.wholphin.ui.components.ExpandableFaButton
 import com.github.damontecres.wholphin.ui.components.ExpandablePlayButton
+import com.github.damontecres.wholphin.ui.components.FilterByButton
 import com.github.damontecres.wholphin.ui.components.LoadingPage
 import com.github.damontecres.wholphin.ui.components.OverviewText
+import com.github.damontecres.wholphin.ui.components.SortByButton
+import com.github.damontecres.wholphin.ui.data.BoxSetSortOptions
+import com.github.damontecres.wholphin.ui.data.SortAndDirection
 import com.github.damontecres.wholphin.ui.enableMarquee
+import com.github.damontecres.wholphin.ui.formatDateTime
 import com.github.damontecres.wholphin.ui.ifElse
 import com.github.damontecres.wholphin.ui.launchIO
 import com.github.damontecres.wholphin.ui.nav.Destination
 import com.github.damontecres.wholphin.ui.roundMinutes
+import com.github.damontecres.wholphin.ui.setValueOnMain
 import com.github.damontecres.wholphin.ui.tryRequestFocus
+import com.github.damontecres.wholphin.ui.util.FilterUtils
 import com.github.damontecres.wholphin.ui.util.LocalClock
 import com.github.damontecres.wholphin.util.ApiRequestPager
-import com.github.damontecres.wholphin.util.GetPlaylistItemsRequestHandler
+import com.github.damontecres.wholphin.util.GetItemsRequestHandler
 import com.github.damontecres.wholphin.util.LoadingExceptionHandler
 import com.github.damontecres.wholphin.util.LoadingState
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import org.jellyfin.sdk.api.client.ApiClient
-import org.jellyfin.sdk.model.api.request.GetPlaylistItemsRequest
+import org.jellyfin.sdk.model.api.BaseItemKind
+import org.jellyfin.sdk.model.api.ItemSortBy
+import org.jellyfin.sdk.model.api.SortOrder
+import org.jellyfin.sdk.model.api.request.GetItemsRequest
 import org.jellyfin.sdk.model.extensions.ticks
+import timber.log.Timber
 import java.util.UUID
 import javax.inject.Inject
 import kotlin.time.Duration
@@ -92,9 +115,22 @@ class PlaylistViewModel
         api: ApiClient,
         val navigationManager: NavigationManager,
         private val backdropService: BackdropService,
+        private val serverRepository: ServerRepository,
+        private val libraryDisplayInfoDao: LibraryDisplayInfoDao,
     ) : ItemViewModel(api) {
         val loading = MutableLiveData<LoadingState>(LoadingState.Pending)
         val items = MutableLiveData<List<BaseItem?>>(listOf())
+        val filterAndSort =
+            MutableStateFlow<FilterAndSort>(
+                FilterAndSort(
+                    filter = GetItemsFilter(),
+                    sortAndDirection =
+                        SortAndDirection(
+                            ItemSortBy.DEFAULT,
+                            SortOrder.ASCENDING,
+                        ),
+                ),
+            )
 
         fun init(playlistId: UUID) {
             loading.value = LoadingState.Loading
@@ -103,18 +139,92 @@ class PlaylistViewModel
                     LoadingExceptionHandler(loading, "Failed to fetch playlist $playlistId"),
             ) {
                 val playlist = fetchItem(playlistId)
-                val request =
-                    GetPlaylistItemsRequest(
-                        playlistId = playlist.id,
-                        fields = DefaultItemFields,
+                val libraryDisplayInfo =
+                    serverRepository.currentUser.value?.let { user ->
+                        libraryDisplayInfoDao.getItem(user, itemId)
+                    }
+                val filter = libraryDisplayInfo?.filter ?: GetItemsFilter()
+                val sortAndDirection =
+                    libraryDisplayInfo?.sortAndDirection ?: SortAndDirection(
+                        ItemSortBy.DEFAULT,
+                        SortOrder.ASCENDING,
                     )
-                val pager = ApiRequestPager(api, request, GetPlaylistItemsRequestHandler, viewModelScope).init()
+                loadItems(filter, sortAndDirection)
+            }
+        }
+
+        fun loadItems(
+            filter: GetItemsFilter,
+            sortAndDirection: SortAndDirection,
+        ) {
+            viewModelScope.launchIO {
+                backdropService.clearBackdrop()
+                loading.setValueOnMain(LoadingState.Loading)
+                this@PlaylistViewModel.filterAndSort.update {
+                    FilterAndSort(filter, sortAndDirection)
+                }
+
+                serverRepository.currentUser.value?.let { user ->
+                    val playlistId = item.value!!.id
+                    viewModelScope.launchIO {
+                        val libraryDisplayInfo =
+                            libraryDisplayInfoDao.getItem(user, itemId)?.copy(
+                                filter = filter,
+                                sort = sortAndDirection.sort,
+                                direction = sortAndDirection.direction,
+                            )
+                                ?: LibraryDisplayInfo(
+                                    userId = user.rowId,
+                                    itemId = itemId,
+                                    sort = sortAndDirection.sort,
+                                    direction = sortAndDirection.direction,
+                                    filter = filter,
+                                    viewOptions = null,
+                                )
+                        libraryDisplayInfoDao.saveItem(libraryDisplayInfo)
+                    }
+
+                    val request =
+                        filter.applyTo(
+                            GetItemsRequest(
+                                parentId = playlistId,
+                                userId = user.id,
+                                fields = DefaultItemFields,
+                                sortBy = listOf(sortAndDirection.sort),
+                                sortOrder = listOf(sortAndDirection.direction),
+                            ),
+                        )
+                    try {
+                        val pager =
+                            ApiRequestPager(
+                                api,
+                                request,
+                                GetItemsRequestHandler,
+                                viewModelScope,
+                            ).init()
+
                         withContext(Dispatchers.Main) {
                             items.value = pager
                             loading.value = LoadingState.Success
                         }
+                    } catch (ex: Exception) {
+                        Timber.e(ex, "Error fetching playlist %s", itemId)
+                        withContext(Dispatchers.Main) {
+                            items.value = listOf()
+                            loading.value = LoadingState.Error(ex)
                         }
                     }
+                }
+            }
+        }
+
+        suspend fun getFilterOptionValues(filterOption: ItemFilterBy<*>): List<FilterValueOption> =
+            FilterUtils.getFilterOptionValues(
+                api,
+                serverRepository.currentUser.value?.id,
+                itemUuid,
+                filterOption,
+            )
 
         fun updateBackdrop(item: BaseItem) {
             viewModelScope.launchIO {
@@ -123,6 +233,12 @@ class PlaylistViewModel
         }
     }
 
+@Immutable
+data class FilterAndSort(
+    val filter: GetItemsFilter,
+    val sortAndDirection: SortAndDirection,
+)
+
 @Composable
 fun PlaylistDetails(
     destination: Destination.MediaItem,
@@ -136,42 +252,37 @@ fun PlaylistDetails(
     val loading by viewModel.loading.observeAsState(LoadingState.Pending)
     val playlist by viewModel.item.observeAsState(null)
     val items by viewModel.items.observeAsState(listOf())
+    val filterAndSort by viewModel.filterAndSort.collectAsState()
 
     var longClickDialog by remember { mutableStateOf<DialogParams?>(null) }
 
-    when (val st = loading) {
-        is LoadingState.Error -> {
-            ErrorMessage(st, modifier)
-        }
+    val goToString = stringResource(R.string.go_to)
+    val playFromHereString = stringResource(R.string.play_from_here)
 
-        LoadingState.Pending, LoadingState.Loading -> {
-            LoadingPage(modifier)
-        }
-
-        LoadingState.Success -> {
-            playlist?.let {
-                val focusRequester = remember { FocusRequester() }
-                LaunchedEffect(Unit) { focusRequester.tryRequestFocus() }
     PlaylistDetailsContent(
-                    playlist = it,
+        loadingState = loading,
+        playlist = playlist,
         items = items,
-                    focusRequester = focusRequester,
         onChangeBackdrop = viewModel::updateBackdrop,
         onClickIndex = { index, _ ->
             viewModel.navigationManager.navigateTo(
                 Destination.PlaybackList(
-                                itemId = it.id,
+                    itemId = destination.itemId,
                     startIndex = index,
                     shuffle = false,
+                    filter = filterAndSort.filter,
+                    sortAndDirection = filterAndSort.sortAndDirection,
                 ),
             )
         },
         onClickPlay = { shuffle ->
             viewModel.navigationManager.navigateTo(
                 Destination.PlaybackList(
-                                itemId = it.id,
+                    itemId = destination.itemId,
                     startIndex = 0,
                     shuffle = shuffle,
+                    filter = filterAndSort.filter,
+                    sortAndDirection = filterAndSort.sortAndDirection,
                 ),
             )
         },
@@ -183,31 +294,33 @@ fun PlaylistDetails(
                     items =
                         listOf(
                             DialogItem(
-                                            context.getString(R.string.go_to),
+                                goToString,
                                 Icons.Default.ArrowForward,
                             ) {
                                 viewModel.navigationManager.navigateTo(item.destination())
                             },
                             DialogItem(
-                                            context.getString(R.string.play_from_here),
+                                playFromHereString,
                                 Icons.Default.PlayArrow,
                             ) {
                                 viewModel.navigationManager.navigateTo(
                                     Destination.PlaybackList(
-                                                    itemId = it.id,
+                                        itemId = destination.itemId,
                                         startIndex = index,
                                         shuffle = false,
+                                        filter = filterAndSort.filter,
+                                        sortAndDirection = filterAndSort.sortAndDirection,
                                     ),
                                 )
                             },
                         ),
                 )
         },
+        filterAndSort = filterAndSort,
+        onFilterAndSortChange = viewModel::loadItems,
+        getPossibleFilterValues = viewModel::getFilterOptionValues,
         modifier = modifier,
     )
-            }
-        }
-    }
     longClickDialog?.let { params ->
         DialogPopup(
             params = params,
@@ -218,14 +331,17 @@ fun PlaylistDetails(
 
 @Composable
 fun PlaylistDetailsContent(
-    playlist: BaseItem,
+    playlist: BaseItem?,
     items: List<BaseItem?>,
     onClickIndex: (Int, BaseItem) -> Unit,
     onLongClickIndex: (Int, BaseItem) -> Unit,
     onClickPlay: (shuffle: Boolean) -> Unit,
     onChangeBackdrop: (BaseItem) -> Unit,
+    filterAndSort: FilterAndSort,
+    onFilterAndSortChange: (GetItemsFilter, SortAndDirection) -> Unit,
+    getPossibleFilterValues: suspend (ItemFilterBy<*>) -> List<FilterValueOption>,
+    loadingState: LoadingState,
     modifier: Modifier = Modifier,
-    focusRequester: FocusRequester = remember { FocusRequester() },
 ) {
     var savedIndex by rememberSaveable { mutableIntStateOf(0) }
     var focusedIndex by remember { mutableIntStateOf(savedIndex) }
@@ -234,6 +350,12 @@ fun PlaylistDetailsContent(
     LaunchedEffect(focusedItem) {
         focusedItem?.let(onChangeBackdrop)
     }
+    val focusRequester = remember { FocusRequester() }
+    LaunchedEffect(loadingState) {
+        if (loadingState is LoadingState.Success || loadingState is LoadingState.Error) {
+            focusRequester.tryRequestFocus()
+        }
+    }
 
     val playButtonFocusRequester = remember { FocusRequester() }
 
@@ -248,22 +370,35 @@ fun PlaylistDetailsContent(
                     .fillMaxSize(),
         ) {
             Row(
-                verticalAlignment = Alignment.CenterVertically,
-                horizontalArrangement = Arrangement.spacedBy(32.dp),
+                horizontalArrangement = Arrangement.spacedBy(24.dp),
                 modifier =
                     Modifier
-                        .padding(horizontal = 16.dp)
+                        .padding(horizontal = 8.dp)
                         .fillMaxWidth(),
             ) {
                 PlaylistDetailsHeader(
                     focusedItem = focusedItem,
                     onClickPlay = onClickPlay,
                     playButtonFocusRequester = playButtonFocusRequester,
+                    focusRequester = if (items.isEmpty()) focusRequester else remember { FocusRequester() },
+                    filterAndSort = filterAndSort,
+                    onFilterAndSortChange = onFilterAndSortChange,
+                    getPossibleFilterValues = getPossibleFilterValues,
                     modifier =
                         Modifier
-                            .padding(start = 16.dp)
+                            .padding(start = 16.dp, top = 80.dp)
                             .fillMaxWidth(.25f),
                 )
+                when (loadingState) {
+                    is LoadingState.Error -> {
+                        ErrorMessage(loadingState, modifier)
+                    }
+
+                    LoadingState.Pending, LoadingState.Loading -> {
+                        LoadingPage(modifier)
+                    }
+
+                    LoadingState.Success -> {
                         Column(
                             modifier =
                                 Modifier
@@ -271,12 +406,13 @@ fun PlaylistDetailsContent(
                                     .padding(horizontal = 16.dp),
                         ) {
                             Text(
-                        text = playlist.name ?: stringResource(R.string.playlist),
+                                text = playlist?.name ?: stringResource(R.string.playlist),
                                 color = MaterialTheme.colorScheme.onSurface,
                                 style = MaterialTheme.typography.displayMedium,
                                 textAlign = TextAlign.Center,
                                 modifier = Modifier.fillMaxWidth(),
                             )
+                            if (items.isNotEmpty()) {
                                 LazyColumn(
                                     contentPadding = PaddingValues(8.dp),
                                     modifier =
@@ -290,7 +426,11 @@ fun PlaylistDetailsContent(
                                                     .surfaceColorAtElevation(1.dp)
                                                     .copy(alpha = .75f),
                                                 shape = RoundedCornerShape(16.dp),
-                                ).focusRequester(focusRequester)
+                                            ).focusProperties {
+                                                onExit = {
+                                                    playButtonFocusRequester.tryRequestFocus()
+                                                }
+                                            }.focusRequester(focusRequester)
                                             .focusGroup()
                                             .focusRestorer(focus),
                                 ) {
@@ -327,6 +467,28 @@ fun PlaylistDetailsContent(
                                         )
                                     }
                                 }
+                            } else {
+                                Box(
+                                    contentAlignment = Alignment.Center,
+                                    modifier = Modifier.fillMaxWidth(),
+                                ) {
+                                    Text(
+                                        text = stringResource(R.string.no_results),
+                                        style = MaterialTheme.typography.titleLarge,
+                                        textAlign = TextAlign.Center,
+                                        modifier =
+                                            Modifier
+                                                .focusProperties {
+                                                    onExit = {
+                                                        playButtonFocusRequester.tryRequestFocus()
+                                                    }
+                                                }.focusRequester(focusRequester)
+                                                .focusable(),
+                                    )
+                                }
+                            }
+                        }
+                    }
                 }
             }
         }
@@ -338,6 +500,10 @@ fun PlaylistDetailsHeader(
     focusedItem: BaseItem?,
     onClickPlay: (shuffle: Boolean) -> Unit,
     playButtonFocusRequester: FocusRequester,
+    focusRequester: FocusRequester,
+    filterAndSort: FilterAndSort,
+    onFilterAndSortChange: (GetItemsFilter, SortAndDirection) -> Unit,
+    getPossibleFilterValues: suspend (ItemFilterBy<*>) -> List<FilterValueOption>,
     modifier: Modifier = Modifier,
 ) {
     Column(
@@ -346,13 +512,14 @@ fun PlaylistDetailsHeader(
     ) {
         Row(
             horizontalArrangement = Arrangement.spacedBy(8.dp),
-            modifier = Modifier.focusRequester(playButtonFocusRequester),
+            modifier = Modifier,
         ) {
             ExpandablePlayButton(
                 title = R.string.play,
                 resume = Duration.ZERO,
                 icon = Icons.Default.PlayArrow,
                 onClick = { onClickPlay.invoke(false) },
+                modifier = Modifier.focusRequester(playButtonFocusRequester),
             )
             ExpandableFaButton(
                 title = R.string.shuffle,
@@ -360,16 +527,45 @@ fun PlaylistDetailsHeader(
                 onClick = { onClickPlay.invoke(true) },
             )
         }
+        Row(
+            horizontalArrangement = Arrangement.spacedBy(8.dp),
+            modifier = Modifier,
+        ) {
+            FilterByButton(
+                filterOptions = DefaultPlaylistItemsOptions,
+                current = filterAndSort.filter,
+                onFilterChange = {
+                    onFilterAndSortChange.invoke(
+                        it,
+                        filterAndSort.sortAndDirection,
+                    )
+                },
+                getPossibleValues = getPossibleFilterValues,
+                modifier = Modifier.focusRequester(focusRequester),
+            )
+            SortByButton(
+                sortOptions = BoxSetSortOptions,
+                current = filterAndSort.sortAndDirection,
+                onSortChange = { onFilterAndSortChange.invoke(filterAndSort.filter, it) },
+            )
+        }
         Text(
             text = focusedItem?.title ?: "",
             color = MaterialTheme.colorScheme.onSurface,
-            style = MaterialTheme.typography.headlineLarge,
+            style = MaterialTheme.typography.headlineSmall,
         )
         Text(
             text = focusedItem?.subtitle ?: "",
             color = MaterialTheme.colorScheme.onSurface,
-            style = MaterialTheme.typography.headlineSmall,
+            style = MaterialTheme.typography.titleMedium,
         )
+        if (focusedItem?.type == BaseItemKind.EPISODE && focusedItem.data.premiereDate != null) {
+            Text(
+                text = formatDateTime(focusedItem.data.premiereDate!!),
+                color = MaterialTheme.colorScheme.onSurface,
+                style = MaterialTheme.typography.titleSmall,
+            )
+        }
         OverviewText(
             overview = focusedItem?.data?.overview ?: "",
             maxLines = 10,

app/src/main/java/com/github/damontecres/wholphin/ui/util/FilterUtils.kt

@@ -0,0 +1,113 @@
+package com.github.damontecres.wholphin.ui.util
+
+import com.github.damontecres.wholphin.data.filter.CommunityRatingFilter
+import com.github.damontecres.wholphin.data.filter.DecadeFilter
+import com.github.damontecres.wholphin.data.filter.FavoriteFilter
+import com.github.damontecres.wholphin.data.filter.FilterValueOption
+import com.github.damontecres.wholphin.data.filter.FilterVideoType
+import com.github.damontecres.wholphin.data.filter.GenreFilter
+import com.github.damontecres.wholphin.data.filter.ItemFilterBy
+import com.github.damontecres.wholphin.data.filter.OfficialRatingFilter
+import com.github.damontecres.wholphin.data.filter.PlayedFilter
+import com.github.damontecres.wholphin.data.filter.VideoTypeFilter
+import com.github.damontecres.wholphin.data.filter.YearFilter
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import org.jellyfin.sdk.api.client.ApiClient
+import org.jellyfin.sdk.api.client.extensions.genresApi
+import org.jellyfin.sdk.api.client.extensions.localizationApi
+import org.jellyfin.sdk.api.client.extensions.yearsApi
+import org.jellyfin.sdk.model.api.ItemSortBy
+import org.jellyfin.sdk.model.api.SortOrder
+import timber.log.Timber
+import java.util.TreeSet
+import java.util.UUID
+
+object FilterUtils {
+    /**
+     * Gets the possible values for a filter
+     *
+     * For example, the possible genres in the parent ID
+     */
+    suspend fun getFilterOptionValues(
+        api: ApiClient,
+        userId: UUID?,
+        parentId: UUID?,
+        filterOption: ItemFilterBy<*>,
+    ): List<FilterValueOption> =
+        withContext(Dispatchers.IO) {
+            try {
+                when (filterOption) {
+                    GenreFilter -> {
+                        api.genresApi
+                            .getGenres(
+                                parentId = parentId,
+                                userId = userId,
+                            ).content.items
+                            .map { FilterValueOption(it.name ?: "", it.id) }
+                    }
+
+                    FavoriteFilter,
+                    PlayedFilter,
+                    -> {
+                        listOf(
+                            FilterValueOption("True", null),
+                            FilterValueOption("False", null),
+                        )
+                    }
+
+                    OfficialRatingFilter -> {
+                        api.localizationApi.getParentalRatings().content.map {
+                            FilterValueOption(it.name ?: "", it.value)
+                        }
+                    }
+
+                    VideoTypeFilter -> {
+                        FilterVideoType.entries.map {
+                            FilterValueOption(it.readable, it)
+                        }
+                    }
+
+                    YearFilter -> {
+                        api.yearsApi
+                            .getYears(
+                                parentId = parentId,
+                                userId = userId,
+                                sortBy = listOf(ItemSortBy.SORT_NAME),
+                                sortOrder = listOf(SortOrder.ASCENDING),
+                            ).content.items
+                            .mapNotNull {
+                                it.name?.toIntOrNull()?.let { FilterValueOption(it.toString(), it) }
+                            }
+                    }
+
+                    DecadeFilter -> {
+                        val items = TreeSet<Int>()
+                        api.yearsApi
+                            .getYears(
+                                parentId = parentId,
+                                userId = userId,
+                                sortBy = listOf(ItemSortBy.SORT_NAME),
+                                sortOrder = listOf(SortOrder.ASCENDING),
+                            ).content.items
+                            .mapNotNullTo(items) {
+                                it.name
+                                    ?.toIntOrNull()
+                                    ?.div(10)
+                                    ?.times(10)
+                            }
+                        items.toList().sorted().map { FilterValueOption("$it's", it) }
+                    }
+
+                    CommunityRatingFilter -> {
+                        (1..10).map {
+                            FilterValueOption("$it", it)
+                        }
+                    }
+                }
+            } catch (ex: Exception) {
+                Timber.e(ex, "Exception get filter value options for $filterOption")
+                listOf()
+            }
+        }
+}