Add multi-part videos to playback queue (#520)

## Description
When playing media with multiple parts, the additional parts will be
added to the playback queue. This means a multi-part movie or episode
will be play all of the parts in order before the next item in the
queue.

This only affects the playback queue. There's no UI changes and no
indication that a movie or episode has multiple parts. I'll work on that
in a separate PR.

### Related issues
Related to #455

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

@@ -10,6 +10,7 @@ import com.github.damontecres.wholphin.data.model.PlaylistInfo
 import com.github.damontecres.wholphin.ui.DefaultItemFields
 import com.github.damontecres.wholphin.ui.components.baseItemKinds
 import com.github.damontecres.wholphin.ui.data.SortAndDirection
+import com.github.damontecres.wholphin.ui.gt
 import com.github.damontecres.wholphin.ui.indexOfFirstOrNull
 import com.github.damontecres.wholphin.ui.playback.playable
 import com.github.damontecres.wholphin.ui.toServerString
@@ -22,6 +23,7 @@ import dagger.hilt.android.qualifiers.ApplicationContext
 import kotlinx.coroutines.CoroutineScope
 import org.jellyfin.sdk.api.client.ApiClient
 import org.jellyfin.sdk.api.client.extensions.playlistsApi
+import org.jellyfin.sdk.api.client.extensions.videosApi
 import org.jellyfin.sdk.model.api.BaseItemDto
 import org.jellyfin.sdk.model.api.BaseItemKind
 import org.jellyfin.sdk.model.api.CreatePlaylistDto
@@ -64,10 +66,14 @@ class PlaylistCreator
                     sortBy = if (shuffled) ItemSortBy.RANDOM else null,
                     limit = Playlist.MAX_SIZE,
                 )
-            val episodes = GetEpisodesRequestHandler.execute(api, request).content.items
+            val episodes =
+                GetEpisodesRequestHandler
+                    .execute(api, request)
+                    .content.items
+                    .convertAndAddParts(false)
             val startIndex =
                 episodeId?.let { episodes.indexOfFirstOrNull { it.id == episodeId } } ?: 0
-            return Playlist(episodes.map { BaseItem.from(it, api) }, startIndex)
+            return Playlist(episodes, startIndex)
         }
 
         suspend fun createFromPlaylistId(
@@ -82,12 +88,11 @@ class PlaylistCreator
                     startIndex = startIndex,
                     limit = Playlist.MAX_SIZE,
                 )
-            val items = GetPlaylistItemsRequestHandler.execute(api, request).content.items
-            var baseItems = items.map { BaseItem.from(it, api) }
+            var items = GetPlaylistItemsRequestHandler.execute(api, request).content.items
             if (shuffled) {
-                baseItems = baseItems.shuffled()
+                items = items.shuffled()
             }
-            return Playlist(baseItems, 0)
+            return Playlist(items.convertAndAddParts(), 0)
         }
 
         private suspend fun createFromCollection(
@@ -120,19 +125,20 @@ class PlaylistCreator
                         ),
                 )
             val items =
-                GetItemsRequestHandler.execute(api, request).content.items.map {
-                    BaseItem.from(it, api)
-                }
+                GetItemsRequestHandler
+                    .execute(api, request)
+                    .content.items
+                    .convertAndAddParts()
             return Playlist(items, 0)
         }
 
         suspend fun createFrom(
             item: BaseItemDto,
             startIndex: Int = 0,
-            sortAndDirection: SortAndDirection?,
-            shuffled: Boolean,
-            recursive: Boolean,
-            filter: GetItemsFilter,
+            sortAndDirection: SortAndDirection? = SortAndDirection.DEFAULT,
+            shuffled: Boolean = false,
+            recursive: Boolean = false,
+            filter: GetItemsFilter = GetItemsFilter(),
         ): PlaylistCreationResult =
             when (item.type) {
                 BaseItemKind.BOX_SET,
@@ -166,7 +172,7 @@ class PlaylistCreator
                             ),
                         )
                     } else {
-                        PlaylistCreationResult.Error(null, "Episode has not seriesId")
+                        PlaylistCreationResult.Error(null, "Episode has no seriesId")
                     }
                 }
 
@@ -182,7 +188,7 @@ class PlaylistCreator
                             ),
                         )
                     } else {
-                        PlaylistCreationResult.Error(null, "Episode has not seriesId")
+                        PlaylistCreationResult.Error(null, "Episode has no seriesId")
                     }
                 }
 
@@ -207,6 +213,26 @@ class PlaylistCreator
                     )
                 }
 
+                BaseItemKind.MOVIE,
+                BaseItemKind.VIDEO,
+                BaseItemKind.MUSIC_VIDEO,
+                -> {
+                    val list =
+                        buildList {
+                            add(BaseItem(item, false))
+
+                            if (item.partCount.gt(1)) {
+                                api.videosApi
+                                    .getAdditionalPart(item.id)
+                                    .content.items
+                                    .map {
+                                        BaseItem(it, false)
+                                    }.let(::addAll)
+                            }
+                        }
+                    PlaylistCreationResult.Success(Playlist(list, 0))
+                }
+
                 // Not support yet
 //                BaseItemKind.AGGREGATE_FOLDER -> TODO()
 //                BaseItemKind.FOLDER -> TODO()
@@ -220,6 +246,20 @@ class PlaylistCreator
                 }
             }
 
+        private suspend fun List<BaseItemDto>.convertAndAddParts(useSeriesForPrimary: Boolean = false): List<BaseItem> =
+            buildList {
+                this@convertAndAddParts.forEach { ep ->
+                    add(BaseItem(ep, useSeriesForPrimary))
+                    if (ep.partCount.gt(1)) {
+                        val parts =
+                            api.videosApi.getAdditionalPart(ep.id).content.items.map { part ->
+                                BaseItem(part, useSeriesForPrimary)
+                            }
+                        addAll(parts)
+                    }
+                }
+            }
+
         suspend fun getServerPlaylists(
             mediaType: MediaType?,
             scope: CoroutineScope,

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

@@ -418,3 +418,10 @@ fun rememberBackDropImage(item: BaseItem): String? {
     val imageUrlService = LocalImageUrlService.current
     return remember(item) { imageUrlService.getItemImageUrl(item, ImageType.BACKDROP) }
 }
+
+/**
+ * Check if this, coalescing nulls to zero, is greater than that
+ */
+fun Int?.gt(that: Int) = (this ?: 0) > that
+
+fun Int?.lt(that: Int) = (this ?: 0) < that

app/src/main/java/com/github/damontecres/wholphin/ui/playback/PlaybackViewModel.kt

@@ -286,11 +286,12 @@ class PlaybackViewModel
                     playNextUp()
                 }
 
-                if (!isPlaylist && queriedItem.type == BaseItemKind.EPISODE) {
-                    val playlist =
-                        playlistCreator.createFromEpisode(queriedItem.seriesId!!, queriedItem.id)
-                    withContext(Dispatchers.Main) {
-                        this@PlaybackViewModel.playlist.value = playlist
+                if (!isPlaylist) {
+                    val result = playlistCreator.createFrom(queriedItem)
+                    if (result is PlaylistCreationResult.Success && result.playlist.items.isNotEmpty()) {
+                        withContext(Dispatchers.Main) {
+                            this@PlaybackViewModel.playlist.value = result.playlist
+                        }
                     }
                 }
             }