music: refactor model usage

Refactor the way music models are constructed to achieve the following:
- Add a unified interface for resolving display names of artists
- Disambiguate the role of Header in the music objects
- Eliminate the need to load strings in with a context when creating
Header instances

app/src/main/java/org/oxycblt/auxio/coil/CoilUtils.kt

@@ -71,7 +71,10 @@ fun ImageView.bindGenreImage(genre: Genre?) {
     load(genre, R.drawable.ic_genre, MosaicFetcher(context))
 
     if (genre != null) {
-        contentDescription = context.getString(R.string.desc_genre_image, genre.name)
+        contentDescription = context.getString(
+            R.string.desc_genre_image,
+            genre.resolvedName
+        )
     }
 }
 

app/src/main/java/org/oxycblt/auxio/detail/AlbumDetailFragment.kt

@@ -52,7 +52,7 @@ class AlbumDetailFragment : DetailFragment() {
         container: ViewGroup?,
         savedInstanceState: Bundle?
     ): View {
-        detailModel.setAlbum(args.albumId, requireContext())
+        detailModel.setAlbum(args.albumId)
 
         val detailAdapter = AlbumDetailAdapter(
             playbackModel, detailModel,

app/src/main/java/org/oxycblt/auxio/detail/ArtistDetailFragment.kt

@@ -48,7 +48,7 @@ class ArtistDetailFragment : DetailFragment() {
         container: ViewGroup?,
         savedInstanceState: Bundle?
     ): View {
-        detailModel.setArtist(args.artistId, requireContext())
+        detailModel.setArtist(args.artistId)
 
         val detailAdapter = ArtistDetailAdapter(
             playbackModel,

app/src/main/java/org/oxycblt/auxio/detail/DetailFragment.kt

@@ -74,7 +74,7 @@ abstract class DetailFragment : Fragment() {
         super.onStop()
 
         // Cancel all pending menus when this fragment stops to prevent bugs/crashes
-        detailModel.finishShowMenu(null, requireContext())
+        detailModel.finishShowMenu(null)
     }
 
     /**
@@ -138,12 +138,12 @@ abstract class DetailFragment : Fragment() {
 
             setOnMenuItemClickListener { item ->
                 item.isChecked = true
-                detailModel.finishShowMenu(SortMode.fromId(item.itemId)!!, config.anchor.context)
+                detailModel.finishShowMenu(SortMode.fromId(item.itemId)!!)
                 true
             }
 
             setOnDismissListener {
-                detailModel.finishShowMenu(null, config.anchor.context)
+                detailModel.finishShowMenu(null)
             }
 
             if (showItem != null) {

app/src/main/java/org/oxycblt/auxio/detail/DetailViewModel.kt

@@ -18,7 +18,6 @@
 
 package org.oxycblt.auxio.detail
 
-import android.content.Context
 import android.view.View
 import androidx.lifecycle.LiveData
 import androidx.lifecycle.MutableLiveData
@@ -30,6 +29,7 @@ import org.oxycblt.auxio.music.Artist
 import org.oxycblt.auxio.music.BaseModel
 import org.oxycblt.auxio.music.Genre
 import org.oxycblt.auxio.music.Header
+import org.oxycblt.auxio.music.HeaderString
 import org.oxycblt.auxio.music.MusicStore
 import org.oxycblt.auxio.settings.SettingsManager
 import org.oxycblt.auxio.ui.DisplayMode
@@ -80,50 +80,50 @@ class DetailViewModel : ViewModel() {
 
     private val settingsManager = SettingsManager.getInstance()
 
-    fun setGenre(id: Long, context: Context) {
+    fun setGenre(id: Long) {
         if (mCurGenre.value?.id == id) return
 
         val musicStore = MusicStore.requireInstance()
         mCurGenre.value = musicStore.genres.find { it.id == id }
-        refreshGenreData(context)
+        refreshGenreData()
     }
 
-    fun setArtist(id: Long, context: Context) {
+    fun setArtist(id: Long) {
         if (mCurArtist.value?.id == id) return
 
         val musicStore = MusicStore.requireInstance()
         mCurArtist.value = musicStore.artists.find { it.id == id }
-        refreshArtistData(context)
+        refreshArtistData()
     }
 
-    fun setAlbum(id: Long, context: Context) {
+    fun setAlbum(id: Long) {
         if (mCurAlbum.value?.id == id) return
 
         val musicStore = MusicStore.requireInstance()
         mCurAlbum.value = musicStore.albums.find { it.id == id }
-        refreshAlbumData(context)
+        refreshAlbumData()
     }
 
     /**
      * Mark that the menu process is done with the new [SortMode].
      * Pass null if there was no change.
      */
-    fun finishShowMenu(newMode: SortMode?, context: Context) {
+    fun finishShowMenu(newMode: SortMode?) {
         mShowMenu.value = null
 
         if (newMode != null) {
             when (currentMenuContext) {
                 DisplayMode.SHOW_ALBUMS -> {
                     settingsManager.detailAlbumSort = newMode
-                    refreshAlbumData(context)
+                    refreshAlbumData()
                 }
                 DisplayMode.SHOW_ARTISTS -> {
                     settingsManager.detailArtistSort = newMode
-                    refreshArtistData(context)
+                    refreshArtistData()
                 }
                 DisplayMode.SHOW_GENRES -> {
                     settingsManager.detailGenreSort = newMode
-                    refreshGenreData(context)
+                    refreshGenreData()
                 }
                 else -> {}
             }
@@ -153,13 +153,13 @@ class DetailViewModel : ViewModel() {
         isNavigating = navigating
     }
 
-    private fun refreshGenreData(context: Context) {
+    private fun refreshGenreData() {
         val data = mutableListOf<BaseModel>(curGenre.value!!)
 
         data.add(
             ActionHeader(
                 id = -2,
-                name = context.getString(R.string.lbl_songs),
+                string = HeaderString.Single(R.string.lbl_songs),
                 icon = R.drawable.ic_sort,
                 desc = R.string.lbl_sort,
                 onClick = { view ->
@@ -174,14 +174,14 @@ class DetailViewModel : ViewModel() {
         mGenreData.value = data
     }
 
-    private fun refreshArtistData(context: Context) {
+    private fun refreshArtistData() {
         val artist = curArtist.value!!
         val data = mutableListOf<BaseModel>(artist)
 
         data.add(
             Header(
                 id = -2,
-                name = context.getString(R.string.lbl_albums)
+                string = HeaderString.Single(R.string.lbl_albums)
             )
         )
 
@@ -190,7 +190,7 @@ class DetailViewModel : ViewModel() {
         data.add(
             ActionHeader(
                 id = -3,
-                name = context.getString(R.string.lbl_songs),
+                string = HeaderString.Single(R.string.lbl_songs),
                 icon = R.drawable.ic_sort,
                 desc = R.string.lbl_sort,
                 onClick = { view ->
@@ -205,13 +205,13 @@ class DetailViewModel : ViewModel() {
         mArtistData.value = data.toList()
     }
 
-    private fun refreshAlbumData(context: Context) {
+    private fun refreshAlbumData() {
         val data = mutableListOf<BaseModel>(curAlbum.value!!)
 
         data.add(
             ActionHeader(
                 id = -2,
-                name = context.getString(R.string.lbl_songs),
+                string = HeaderString.Single(R.string.lbl_songs),
                 icon = R.drawable.ic_sort,
                 desc = R.string.lbl_sort,
                 onClick = { view ->

app/src/main/java/org/oxycblt/auxio/detail/GenreDetailFragment.kt

@@ -48,7 +48,7 @@ class GenreDetailFragment : DetailFragment() {
         container: ViewGroup?,
         savedInstanceState: Bundle?
     ): View {
-        detailModel.setGenre(args.genreId, requireContext())
+        detailModel.setGenre(args.genreId)
 
         val detailAdapter = GenreDetailAdapter(
             playbackModel,

app/src/main/java/org/oxycblt/auxio/detail/recycler/AlbumDetailAdapter.kt

@@ -145,7 +145,7 @@ class AlbumDetailAdapter(
             binding.detailName.text = data.name
 
             binding.detailSubhead.apply {
-                text = data.artist.name
+                text = data.artist.resolvedName
 
                 setOnClickListener {
                     detailModel.navToItem(data.artist)

app/src/main/java/org/oxycblt/auxio/detail/recycler/ArtistDetailAdapter.kt

@@ -190,10 +190,13 @@ class ArtistDetailAdapter(
 
             binding.detailCover.apply {
                 bindArtistImage(data)
-                contentDescription = context.getString(R.string.desc_artist_image, data.name)
+                contentDescription = context.getString(
+                    R.string.desc_artist_image,
+                    data.resolvedName
+                )
             }
 
-            binding.detailName.text = data.name
+            binding.detailName.text = data.resolvedName
 
             binding.detailSubhead.text = data.genre?.resolvedName
                 ?: context.getString(R.string.def_genre)

app/src/main/java/org/oxycblt/auxio/detail/recycler/GenreDetailAdapter.kt

@@ -136,10 +136,13 @@ class GenreDetailAdapter(
 
             binding.detailCover.apply {
                 bindGenreImage(data)
-                contentDescription = context.getString(R.string.desc_artist_image, data.name)
+                contentDescription = context.getString(
+                    R.string.desc_genre_image,
+                    data.resolvedName
+                )
             }
 
-            binding.detailName.text = data.name
+            binding.detailName.text = data.resolvedName
 
             binding.detailSubhead.apply {
                 text = context.getPlural(R.plurals.fmt_song_count, data.songs.size)

app/src/main/java/org/oxycblt/auxio/home/HomeViewModel.kt

@@ -112,11 +112,11 @@ class HomeViewModel : ViewModel(), SettingsManager.Callback, MusicStore.MusicCal
             }
             DisplayMode.SHOW_ARTISTS -> {
                 settingsManager.libArtistSort = sort
-                mArtists.value = sort.sortModels(mArtists.value!!)
+                mArtists.value = sort.sortParents(mArtists.value!!)
             }
             DisplayMode.SHOW_GENRES -> {
                 settingsManager.libGenreSort = sort
-                mGenres.value = sort.sortModels(mGenres.value!!)
+                mGenres.value = sort.sortParents(mGenres.value!!)
             }
         }
     }
@@ -139,8 +139,8 @@ class HomeViewModel : ViewModel(), SettingsManager.Callback, MusicStore.MusicCal
     override fun onLoaded(musicStore: MusicStore) {
         mSongs.value = settingsManager.libSongSort.sortSongs(musicStore.songs)
         mAlbums.value = settingsManager.libAlbumSort.sortAlbums(musicStore.albums)
-        mArtists.value = settingsManager.libArtistSort.sortModels(musicStore.artists)
+        mArtists.value = settingsManager.libArtistSort.sortParents(musicStore.artists)
-        mGenres.value = settingsManager.libGenreSort.sortModels(musicStore.genres)
+        mGenres.value = settingsManager.libGenreSort.sortParents(musicStore.genres)
     }
 
     override fun onCleared() {

app/src/main/java/org/oxycblt/auxio/home/list/AlbumListFragment.kt

@@ -62,7 +62,7 @@ class AlbumListFragment : HomeListFragment() {
                 SortMode.ASCENDING, SortMode.DESCENDING -> album.name.sliceArticle()
                     .first().uppercase()
 
-                SortMode.ARTIST -> album.artist.name.sliceArticle()
+                SortMode.ARTIST -> album.artist.resolvedName.sliceArticle()
                     .first().uppercase()
 
                 SortMode.YEAR -> album.year.toString()

app/src/main/java/org/oxycblt/auxio/home/list/ArtistListFragment.kt

@@ -54,7 +54,8 @@ class ArtistListFragment : HomeListFragment() {
 
     override val popupProvider: (Int) -> String
         get() = { idx ->
-            homeModel.artists.value!![idx].name.sliceArticle().first().uppercase()
+            homeModel.artists.value!![idx].resolvedName
+                .sliceArticle().first().uppercase()
         }
 
     class ArtistAdapter(

app/src/main/java/org/oxycblt/auxio/home/list/GenreListFragment.kt

@@ -54,7 +54,8 @@ class GenreListFragment : HomeListFragment() {
 
     override val popupProvider: (Int) -> String
         get() = { idx ->
-            homeModel.genres.value!![idx].name.sliceArticle().first().uppercase()
+            homeModel.genres.value!![idx].resolvedName
+                .sliceArticle().first().uppercase()
         }
 
     class GenreAdapter(

app/src/main/java/org/oxycblt/auxio/home/list/SongListFragment.kt

@@ -58,8 +58,9 @@ class SongListFragment : HomeListFragment() {
                 SortMode.ASCENDING, SortMode.DESCENDING -> song.name.sliceArticle()
                     .first().uppercase()
 
-                SortMode.ARTIST -> song.album.artist.name.sliceArticle()
+                SortMode.ARTIST ->
-                    .first().uppercase()
+                    song.album.artist.resolvedName
+                        .sliceArticle().first().uppercase()
 
                 SortMode.ALBUM -> song.album.name.sliceArticle()
                     .first().uppercase()

app/src/main/java/org/oxycblt/auxio/music/Models.kt

@@ -18,6 +18,7 @@
 
 package org.oxycblt.auxio.music
 
+import android.content.Context
 import android.view.View
 import androidx.annotation.DrawableRes
 import androidx.annotation.StringRes
@@ -27,46 +28,22 @@ import androidx.annotation.StringRes
 /**
  * The base data object for all music.
  * @property id The ID that is assigned to this object
- * @property name The name of this object (Such as a song title)
  */
 sealed class BaseModel {
     abstract val id: Long
-    abstract val name: String
 }
 
-/**
+sealed class Music : BaseModel() {
- * Provides a versatile static hash for a music item that will not change when
+    abstract val name: String
- * MediaStore changes.
+    abstract val hash: Int
- *
- * The reason why this is used is down a couple of reasons:
- * - MediaStore will refresh the unique ID of a piece of media whenever the library
- * changes, which creates bad UX
- * - Using song names makes collisions too common to be reliable
- * - Hashing into an integer makes databases both smaller and more efficent
- *
- * This does lock me into a "Load everything at once, lol" architecture for Auxio, but I
- * think its worth it.
- *
- * @property hash A unique-ish hash for this media item
- *
- * TODO: Make this hash stronger
- */
-sealed interface Hashable {
-    val hash: Int
 }
 
 /**
  * [BaseModel] variant that denotes that this object is a parent of other data objects, such
  * as an [Album] or [Artist]
- * @property displayName Name that handles the usage of [Genre.resolvedName]
- * and the normal [BaseModel.name]
  */
-sealed class Parent : BaseModel(), Hashable {
+sealed class Parent : Music() {
-    val displayName: String get() = if (this is Genre) {
+    abstract val resolvedName: String
-        resolvedName
-    } else {
-        name
-    }
 }
 
 /**
@@ -92,7 +69,7 @@ data class Song(
     val year: Int,
     val track: Int,
     val duration: Long
-) : BaseModel(), Hashable {
+) : Music() {
     private var mAlbum: Album? = null
     private var mGenre: Genre? = null
 
@@ -145,6 +122,10 @@ data class Album(
     val totalDuration: String get() =
         songs.sumOf { it.seconds }.toDuration()
 
+    fun linkArtist(artist: Artist) {
+        mArtist = artist
+    }
+
     override val hash: Int get() {
         var result = name.hashCode()
         result = 31 * result + artistName.hashCode()
@@ -152,9 +133,8 @@ data class Album(
         return result
     }
 
-    fun linkArtist(artist: Artist) {
+    override val resolvedName: String
-        mArtist = artist
+        get() = name
-    }
 }
 
 /**
@@ -166,6 +146,7 @@ data class Album(
 data class Artist(
     override val id: Long,
     override val name: String,
+    override val resolvedName: String,
     val albums: List<Album>
 ) : Parent() {
     init {
@@ -190,44 +171,114 @@ data class Artist(
 /**
  * The data object for a genre. Inherits [Parent]
  * @property songs   The list of all [Song]s in this genre.
- * @property resolvedName A name that has been resolved from its int-genre form to its named form.
  */
 data class Genre(
     override val id: Long,
     override val name: String,
+    override val resolvedName: String
 ) : Parent() {
     private val mSongs = mutableListOf<Song>()
     val songs: List<Song> get() = mSongs
 
-    val resolvedName =
-        name.getGenreNameCompat() ?: name
-
     val totalDuration: String get() =
         songs.sumOf { it.seconds }.toDuration()
 
-    override val hash = name.hashCode()
-
     fun linkSong(song: Song) {
         mSongs.add(song)
         song.linkGenre(this)
     }
+
+    override val hash = name.hashCode()
+}
+
+/**
+ * The string used for a header instance. This class is a bit complex, mostly because it revolves
+ * around passing string resources that are then resolved by the view instead of passing a context
+ * directly.
+ */
+sealed class HeaderString {
+    /** A single string resource. */
+    class Single(@StringRes val id: Int) : HeaderString()
+    /** A string resource with an argument. */
+    class WithArg(@StringRes val id: Int, val arg: Arg) : HeaderString()
+
+    /**
+     * Resolve this instance into a string.
+     */
+    fun resolve(context: Context): String {
+        return when (this) {
+            is Single -> context.getString(id)
+            is WithArg -> context.getString(id, arg.resolve(context))
+        }
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return false
+
+        return when (this) {
+            is Single -> other is Single && other.id == id
+            is WithArg -> other is WithArg && other.id == id && other.arg == arg
+        }
+    }
+
+    override fun hashCode(): Int {
+        return when (this) {
+            is Single -> id.hashCode()
+            is WithArg -> 31 * id.hashCode() * arg.hashCode()
+        }
+    }
+
+    /**
+     * An argument for the [WithArg] header string.
+     */
+    sealed class Arg {
+        /** A string resource to be used as the argument */
+        class Resource(@StringRes val id: Int) : Arg()
+        /** A string value to be used as the argument */
+        class Value(val string: String) : Arg()
+
+        /** Resolve this argument instance into a string. */
+        fun resolve(context: Context): String {
+            return when (this) {
+                is Resource -> context.getString(id)
+                is Value -> string
+            }
+        }
+
+        override fun equals(other: Any?): Boolean {
+            if (this === other) return false
+
+            return when (this) {
+                is Resource -> other is Resource && other.id == id
+                is Value -> other is Value && other.string == this.string
+            }
+        }
+
+        override fun hashCode(): Int {
+            return when (this) {
+                is Resource -> id.hashCode()
+                is Value -> 31 * string.hashCode()
+            }
+        }
+    }
 }
 
 /**
  * A data object used solely for the "Header" UI element.
+ * @see HeaderString
  */
 data class Header(
     override val id: Long,
-    override val name: String,
+    val string: HeaderString
 ) : BaseModel()
 
 /**
  * A data object used for an action header. Like [Header], but with a button.
- * Inherits [BaseModel].
+ * @see HeaderString
  */
 data class ActionHeader(
     override val id: Long,
-    override val name: String,
+    val string: HeaderString,
     @DrawableRes val icon: Int,
     @StringRes val desc: Int,
     val onClick: (View) -> Unit,
@@ -239,7 +290,7 @@ data class ActionHeader(
         if (other !is ActionHeader) return false
 
         if (id != other.id) return false
-        if (name != other.name) return false
+        if (string != other.string) return false
         if (icon != other.icon) return false
         if (desc != other.desc) return false
 
@@ -248,7 +299,7 @@ data class ActionHeader(
 
     override fun hashCode(): Int {
         var result = id.hashCode()
-        result = 31 * result + name.hashCode()
+        result = 31 * result + string.hashCode()
         result = 31 * result + icon
         result = 31 * result + desc
 

app/src/main/java/org/oxycblt/auxio/music/MusicLoader.kt

@@ -20,6 +20,7 @@ package org.oxycblt.auxio.music
 
 import android.annotation.SuppressLint
 import android.content.Context
+import android.provider.MediaStore
 import android.provider.MediaStore.Audio.Genres
 import android.provider.MediaStore.Audio.Media
 import androidx.core.database.getStringOrNull
@@ -152,7 +153,7 @@ class MusicLoader(private val context: Context) {
                 // No non-broken genre would be missing a name.
                 val name = cursor.getStringOrNull(nameIndex) ?: continue
 
-                genres.add(Genre(id, name))
+                genres.add(Genre(id, name, name.getGenreNameCompat() ?: name))
             }
         }
 
@@ -261,18 +262,25 @@ class MusicLoader(private val context: Context) {
         val albumsByArtist = albums.groupBy { it.artistName }
 
         albumsByArtist.forEach { entry ->
+            val resolvedName = if (entry.key == MediaStore.UNKNOWN_STRING) {
+                context.getString(R.string.def_artist)
+            } else {
+                entry.key
+            }
+
             // Because of our hacky album artist system, MediaStore artist IDs are unreliable.
             // Therefore we just use the hashCode of the artist name as our ID and move on.
             artists.add(
                 Artist(
                     id = entry.key.hashCode().toLong(),
                     name = entry.key,
+                    resolvedName = resolvedName,
                     albums = entry.value
                 )
             )
         }
 
-        artists = SortMode.ASCENDING.sortModels(artists).toMutableList()
+        artists = SortMode.ASCENDING.sortParents(artists).toMutableList()
 
         logD("Albums successfully linked into ${artists.size} artists")
     }
@@ -304,7 +312,8 @@ class MusicLoader(private val context: Context) {
 
         val unknownGenre = Genre(
             id = Long.MIN_VALUE,
-            name = context.getString(R.string.def_genre)
+            name = MediaStore.UNKNOWN_STRING,
+            resolvedName = context.getString(R.string.def_genre)
         )
 
         songs.forEach { song ->

app/src/main/java/org/oxycblt/auxio/playback/PlaybackFragment.kt

@@ -122,11 +122,7 @@ class PlaybackFragment : Fragment() {
             binding.playbackSeekBar.setProgress(pos)
         }
 
-        playbackModel.nextItemsInQueue.observe(viewLifecycleOwner) {
+        playbackModel.displayQueue.observe(viewLifecycleOwner) {
-            updateQueueIcon(queueItem)
-        }
-
-        playbackModel.userQueue.observe(viewLifecycleOwner) {
             updateQueueIcon(queueItem)
         }
 

app/src/main/java/org/oxycblt/auxio/playback/PlaybackViewModel.kt

@@ -21,14 +21,20 @@ package org.oxycblt.auxio.playback
 import android.content.Context
 import android.net.Uri
 import androidx.lifecycle.LiveData
+import androidx.lifecycle.MediatorLiveData
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.Transformations
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import kotlinx.coroutines.launch
+import org.oxycblt.auxio.R
+import org.oxycblt.auxio.music.ActionHeader
 import org.oxycblt.auxio.music.Album
 import org.oxycblt.auxio.music.Artist
+import org.oxycblt.auxio.music.BaseModel
 import org.oxycblt.auxio.music.Genre
+import org.oxycblt.auxio.music.Header
+import org.oxycblt.auxio.music.HeaderString
 import org.oxycblt.auxio.music.MusicStore
 import org.oxycblt.auxio.music.Parent
 import org.oxycblt.auxio.music.Song
@@ -89,16 +95,72 @@ class PlaybackViewModel : ViewModel(), PlaybackStateManager.Callback {
     /** The current repeat mode, see [LoopMode] for more information */
     val loopMode: LiveData<LoopMode> get() = mLoopMode
 
+    /** The queue, without the previous items. */
+    val nextItemsInQueue = Transformations.map(queue) { queue ->
+        queue.slice((mIndex.value!! + 1) until queue.size)
+    }
+
+    /** The combined queue data used for UIs, with header data included */
+    val displayQueue = MediatorLiveData<List<BaseModel>>().apply {
+        val combine: (userQueue: List<Song>, nextQueue: List<Song>) -> List<BaseModel> =
+            { userQueue, nextQueue ->
+                val queue = mutableListOf<BaseModel>()
+
+                if (userQueue.isNotEmpty()) {
+                    queue += ActionHeader(
+                        id = -2,
+                        string = HeaderString.Single(R.string.lbl_next_user_queue),
+                        icon = R.drawable.ic_clear,
+                        desc = R.string.desc_clear_user_queue,
+                        onClick = { playbackManager.clearUserQueue() }
+                    )
+
+                    queue += userQueue
+                }
+
+                if (nextQueue.isNotEmpty()) {
+                    val parentName = parent.value?.name
+
+                    queue += Header(
+                        id = -3,
+                        string = HeaderString.WithArg(
+                            R.string.fmt_next_from,
+                            if (parentName != null) {
+                                HeaderString.Arg.Value(parentName)
+                            } else {
+                                HeaderString.Arg.Resource(R.string.lbl_all_songs)
+                            }
+                        )
+                    )
+
+                    queue += nextQueue
+                }
+
+                queue
+            }
+
+        // Do not move these around. The transformed value must be generated through this
+        // observer call first before the userQueue source uses it assuming that it's not
+        // null.
+        addSource(nextItemsInQueue) { nextQueue ->
+            value = combine(userQueue.value!!, nextQueue)
+        }
+
+        addSource(userQueue) { userQueue ->
+            value = combine(
+                userQueue,
+                requireNotNull(nextItemsInQueue.value) {
+                    "Transformed value was not generated yet."
+                }
+            )
+        }
+    }
+
     /** The position as SeekBar progress. */
     val positionAsProgress = Transformations.map(mPosition) {
         if (mSong.value != null) it.toInt() else 0
     }
 
-    /** The queue, without the previous items. */
-    val nextItemsInQueue = Transformations.map(mQueue) {
-        it.slice((mIndex.value!! + 1) until it.size)
-    }
-
     private val playbackManager = PlaybackStateManager.maybeGetInstance()
     private val settingsManager = SettingsManager.getInstance()
 
@@ -316,13 +378,6 @@ class PlaybackViewModel : ViewModel(), PlaybackStateManager.Callback {
         playbackManager.addToUserQueue(settingsManager.detailAlbumSort.sortAlbum(album))
     }
 
-    /**
-     * Clear the user queue entirely
-     */
-    fun clearUserQueue() {
-        playbackManager.clearUserQueue()
-    }
-
     // --- STATUS FUNCTIONS ---
 
     /**

app/src/main/java/org/oxycblt/auxio/playback/queue/QueueAdapter.kt

@@ -115,8 +115,6 @@ class QueueAdapter(
     fun removeItem(adapterIndex: Int) {
         data.removeAt(adapterIndex)
 
-        logD(data)
-
         /*
          * If the data from the next queue is now entirely empty [Signified by a header at the
          * end, remove the next queue header as notify as such.

app/src/main/java/org/oxycblt/auxio/playback/queue/QueueFragment.kt

@@ -27,11 +27,7 @@ import androidx.fragment.app.Fragment
 import androidx.fragment.app.activityViewModels
 import androidx.navigation.fragment.findNavController
 import androidx.recyclerview.widget.ItemTouchHelper
-import org.oxycblt.auxio.R
 import org.oxycblt.auxio.databinding.FragmentQueueBinding
-import org.oxycblt.auxio.music.ActionHeader
-import org.oxycblt.auxio.music.BaseModel
-import org.oxycblt.auxio.music.Header
 import org.oxycblt.auxio.playback.PlaybackViewModel
 import org.oxycblt.auxio.util.applyEdge
 
@@ -79,22 +75,13 @@ class QueueFragment : Fragment() {
 
         // --- VIEWMODEL SETUP ----
 
-        playbackModel.userQueue.observe(viewLifecycleOwner) { userQueue ->
+        playbackModel.displayQueue.observe(viewLifecycleOwner) { queue ->
-            if (userQueue.isEmpty() && playbackModel.nextItemsInQueue.value!!.isEmpty()) {
+            if (queue.isEmpty()) {
                 findNavController().navigateUp()
-
                 return@observe
             }
 
-            queueAdapter.submitList(createQueueData())
+            queueAdapter.submitList(queue.toMutableList())
-        }
-
-        playbackModel.nextItemsInQueue.observe(viewLifecycleOwner) { nextQueue ->
-            if (nextQueue.isEmpty() && playbackModel.userQueue.value!!.isEmpty()) {
-                findNavController().navigateUp()
-            }
-
-            queueAdapter.submitList(createQueueData())
         }
 
         playbackModel.isShuffling.observe(viewLifecycleOwner) { isShuffling ->
@@ -109,40 +96,4 @@ class QueueFragment : Fragment() {
     }
 
     // --- QUEUE DATA ---
-
-    /**
-     * Create the queue data that should be displayed
-     * @return The list of headers/songs that should be displayed.
-     */
-    private fun createQueueData(): MutableList<BaseModel> {
-        val queue = mutableListOf<BaseModel>()
-        val userQueue = playbackModel.userQueue.value!!
-        val nextQueue = playbackModel.nextItemsInQueue.value!!
-
-        if (userQueue.isNotEmpty()) {
-            queue += ActionHeader(
-                id = -2,
-                name = getString(R.string.lbl_next_user_queue),
-                icon = R.drawable.ic_clear,
-                desc = R.string.desc_clear_user_queue,
-                onClick = { playbackModel.clearUserQueue() }
-            )
-
-            queue += userQueue
-        }
-
-        if (nextQueue.isNotEmpty()) {
-            queue += Header(
-                id = -3,
-                name = getString(
-                    R.string.fmt_next_from,
-                    playbackModel.parent.value?.displayName ?: getString(R.string.lbl_all_songs)
-                )
-            )
-
-            queue += nextQueue
-        }
-
-        return queue
-    }
 }

app/src/main/java/org/oxycblt/auxio/playback/system/PlaybackNotification.kt

@@ -81,7 +81,7 @@ class PlaybackNotification private constructor(
      */
     fun setMetadata(song: Song, onDone: () -> Unit) {
         setContentTitle(song.name)
-        setContentText(song.album.artist.name)
+        setContentText(song.album.artist.resolvedName)
 
         // On older versions of android [API <24], show the song's album on the subtext instead of
         // the current mode, as that makes more sense for the old style of media notifications.
@@ -125,7 +125,7 @@ class PlaybackNotification private constructor(
         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) return
 
         // A blank parent always means that the mode is ALL_SONGS
-        setSubText(parent?.displayName ?: context.getString(R.string.lbl_all_songs))
+        setSubText(parent?.resolvedName ?: context.getString(R.string.lbl_all_songs))
     }
 
     // --- NOTIFICATION ACTION BUILDERS ---

app/src/main/java/org/oxycblt/auxio/playback/system/PlaybackSessionConnector.kt

@@ -114,13 +114,15 @@ class PlaybackSessionConnector(
             return
         }
 
+        val artistName = song.album.artist.resolvedName
+
         val builder = MediaMetadataCompat.Builder()
             .putString(MediaMetadataCompat.METADATA_KEY_TITLE, song.name)
             .putString(MediaMetadataCompat.METADATA_KEY_DISPLAY_TITLE, song.name)
-            .putString(MediaMetadataCompat.METADATA_KEY_ARTIST, song.album.artist.name)
+            .putString(MediaMetadataCompat.METADATA_KEY_ARTIST, artistName)
-            .putString(MediaMetadataCompat.METADATA_KEY_AUTHOR, song.album.artist.name)
+            .putString(MediaMetadataCompat.METADATA_KEY_AUTHOR, artistName)
-            .putString(MediaMetadataCompat.METADATA_KEY_COMPOSER, song.album.artist.name)
+            .putString(MediaMetadataCompat.METADATA_KEY_COMPOSER, artistName)
-            .putString(MediaMetadataCompat.METADATA_KEY_ALBUM_ARTIST, song.album.artist.name)
+            .putString(MediaMetadataCompat.METADATA_KEY_ALBUM_ARTIST, artistName)
             .putString(MediaMetadataCompat.METADATA_KEY_ALBUM, song.album.name)
             .putLong(MediaMetadataCompat.METADATA_KEY_DURATION, song.duration)
 

app/src/main/java/org/oxycblt/auxio/search/SearchAdapter.kt

@@ -27,6 +27,7 @@ import org.oxycblt.auxio.music.Artist
 import org.oxycblt.auxio.music.BaseModel
 import org.oxycblt.auxio.music.Genre
 import org.oxycblt.auxio.music.Header
+import org.oxycblt.auxio.music.Music
 import org.oxycblt.auxio.music.Song
 import org.oxycblt.auxio.ui.AlbumViewHolder
 import org.oxycblt.auxio.ui.ArtistViewHolder
@@ -40,8 +41,8 @@ import org.oxycblt.auxio.ui.SongViewHolder
  * @author OxygenCobalt
  */
 class SearchAdapter(
-    private val doOnClick: (data: BaseModel) -> Unit,
+    private val doOnClick: (data: Music) -> Unit,
-    private val doOnLongClick: (view: View, data: BaseModel) -> Unit
+    private val doOnLongClick: (view: View, data: Music) -> Unit
 ) : ListAdapter<BaseModel, RecyclerView.ViewHolder>(DiffCallback<BaseModel>()) {
 
     override fun getItemViewType(position: Int): Int {

app/src/main/java/org/oxycblt/auxio/search/SearchFragment.kt

@@ -35,9 +35,9 @@ import org.oxycblt.auxio.databinding.FragmentSearchBinding
 import org.oxycblt.auxio.detail.DetailViewModel
 import org.oxycblt.auxio.music.Album
 import org.oxycblt.auxio.music.Artist
-import org.oxycblt.auxio.music.BaseModel
 import org.oxycblt.auxio.music.Genre
 import org.oxycblt.auxio.music.Header
+import org.oxycblt.auxio.music.Music
 import org.oxycblt.auxio.music.Song
 import org.oxycblt.auxio.playback.PlaybackViewModel
 import org.oxycblt.auxio.ui.DisplayMode
@@ -54,10 +54,7 @@ import org.oxycblt.auxio.util.logD
  */
 class SearchFragment : Fragment() {
     // SearchViewModel is only scoped to this Fragment
-    private val searchModel: SearchViewModel by viewModels {
+    private val searchModel: SearchViewModel by viewModels()
-        SearchViewModel.Factory(requireContext())
-    }
-
     private val playbackModel: PlaybackViewModel by activityViewModels()
     private val detailModel: DetailViewModel by activityViewModels()
 
@@ -183,7 +180,7 @@ class SearchFragment : Fragment() {
      * Function that handles when an [item] is selected.
      * Handles all datatypes that are selectable.
      */
-    private fun onItemSelection(item: BaseModel, imm: InputMethodManager) {
+    private fun onItemSelection(item: Music, imm: InputMethodManager) {
         if (item is Song) {
             playbackModel.playSong(item)
 

app/src/main/java/org/oxycblt/auxio/search/SearchViewModel.kt

@@ -18,17 +18,17 @@
 
 package org.oxycblt.auxio.search
 
-import android.content.Context
 import androidx.annotation.IdRes
 import androidx.lifecycle.LiveData
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
-import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.viewModelScope
 import kotlinx.coroutines.launch
 import org.oxycblt.auxio.R
 import org.oxycblt.auxio.music.BaseModel
 import org.oxycblt.auxio.music.Header
+import org.oxycblt.auxio.music.HeaderString
+import org.oxycblt.auxio.music.Music
 import org.oxycblt.auxio.music.MusicStore
 import org.oxycblt.auxio.settings.SettingsManager
 import org.oxycblt.auxio.ui.DisplayMode
@@ -38,7 +38,7 @@ import java.text.Normalizer
  * The [ViewModel] for the search functionality
  * @author OxygenCobalt
  */
-class SearchViewModel(context: Context) : ViewModel(), MusicStore.MusicCallback {
+class SearchViewModel : ViewModel(), MusicStore.MusicCallback {
     private val mSearchResults = MutableLiveData(listOf<BaseModel>())
     private var mIsNavigating = false
     private var mFilterMode: DisplayMode? = null
@@ -51,11 +51,6 @@ class SearchViewModel(context: Context) : ViewModel(), MusicStore.MusicCallback
 
     private val settingsManager = SettingsManager.getInstance()
 
-    private val songHeader = Header(id = -1, context.getString(R.string.lbl_songs))
-    private val albumHeader = Header(id = -1, context.getString(R.string.lbl_albums))
-    private val artistHeader = Header(id = -1, context.getString(R.string.lbl_artists))
-    private val genreHeader = Header(id = -1, context.getString(R.string.lbl_genres))
-
     init {
         mFilterMode = settingsManager.searchFilterMode
 
@@ -83,28 +78,28 @@ class SearchViewModel(context: Context) : ViewModel(), MusicStore.MusicCallback
 
             if (mFilterMode == null || mFilterMode == DisplayMode.SHOW_ARTISTS) {
                 musicStore.artists.filterByOrNull(query)?.let { artists ->
-                    results.add(artistHeader)
+                    results.add(Header(-1, HeaderString.Single(R.string.lbl_artists)))
                     results.addAll(artists)
                 }
             }
 
             if (mFilterMode == null || mFilterMode == DisplayMode.SHOW_ALBUMS) {
                 musicStore.albums.filterByOrNull(query)?.let { albums ->
-                    results.add(albumHeader)
+                    results.add(Header(-1, HeaderString.Single(R.string.lbl_albums)))
                     results.addAll(albums)
                 }
             }
 
             if (mFilterMode == null || mFilterMode == DisplayMode.SHOW_GENRES) {
                 musicStore.genres.filterByOrNull(query)?.let { genres ->
-                    results.add(genreHeader)
+                    results.add(Header(-1, HeaderString.Single(R.string.lbl_genres)))
                     results.addAll(genres)
                 }
             }
 
             if (mFilterMode == null || mFilterMode == DisplayMode.SHOW_SONGS) {
                 musicStore.songs.filterByOrNull(query)?.let { songs ->
-                    results.add(songHeader)
+                    results.add(Header(-1, HeaderString.Single(R.string.lbl_songs)))
                     results.addAll(songs)
                 }
             }
@@ -136,7 +131,7 @@ class SearchViewModel(context: Context) : ViewModel(), MusicStore.MusicCallback
      * Shortcut that will run a ignoreCase filter on a list and only return
      * a value if the resulting list is empty.
      */
-    private fun List<BaseModel>.filterByOrNull(value: String): List<BaseModel>? {
+    private fun List<Music>.filterByOrNull(value: String): List<BaseModel>? {
         val filtered = filter {
             // First see if the normal item name will work. If that fails, try the "normalized"
             // [e.g all accented/unicode chars become latin chars] instead. Hopefully this
@@ -195,15 +190,4 @@ class SearchViewModel(context: Context) : ViewModel(), MusicStore.MusicCallback
         super.onCleared()
         MusicStore.cancelAwaitInstance(this)
     }
-
-    class Factory(private val context: Context) : ViewModelProvider.Factory {
-        override fun <T : ViewModel?> create(modelClass: Class<T>): T {
-            check(modelClass.isAssignableFrom(SearchViewModel::class.java)) {
-                "SearchViewModel.Factory does not support this class"
-            }
-
-            @Suppress("UNCHECKED_CAST")
-            return SearchViewModel(context) as T
-        }
-    }
 }

app/src/main/java/org/oxycblt/auxio/ui/SortMode.kt

@@ -22,8 +22,8 @@ import androidx.annotation.IdRes
 import org.oxycblt.auxio.R
 import org.oxycblt.auxio.music.Album
 import org.oxycblt.auxio.music.Artist
-import org.oxycblt.auxio.music.BaseModel
 import org.oxycblt.auxio.music.Genre
+import org.oxycblt.auxio.music.Parent
 import org.oxycblt.auxio.music.Song
 
 /**
@@ -44,7 +44,8 @@ enum class SortMode(@IdRes val itemId: Int) {
      * Sort a list of songs.
      *
      * **Behavior:**
-     * - [ASCENDING] & [DESCENDING]: See [sortModels]
+     * - [ASCENDING]: By name after article, ascending
+     * - [DESCENDING]: By name after article, descending
      * - [ARTIST]: Grouped by album and then sorted [ASCENDING] based off the artist name.
      * - [ALBUM]: Grouped by album and sorted [ASCENDING]
      * - [YEAR]: Grouped by album and sorted by year
@@ -54,7 +55,17 @@ enum class SortMode(@IdRes val itemId: Int) {
      */
     fun sortSongs(songs: Collection<Song>): List<Song> {
         return when (this) {
-            ASCENDING, DESCENDING -> sortModels(songs)
+            ASCENDING -> songs.sortedWith(
+                compareBy(String.CASE_INSENSITIVE_ORDER) { song ->
+                    song.name.sliceArticle()
+                }
+            )
+
+            DESCENDING -> songs.sortedWith(
+                compareByDescending(String.CASE_INSENSITIVE_ORDER) { song ->
+                    song.name.sliceArticle()
+                }
+            )
 
             else -> sortAlbums(songs.groupBy { it.album }.keys).flatMap { album ->
                 ASCENDING.sortAlbum(album)
@@ -66,7 +77,8 @@ enum class SortMode(@IdRes val itemId: Int) {
      * Sort a list of albums.
      *
      * **Behavior:**
-     * - [ASCENDING] & [DESCENDING]: See [sortModels]
+     * - [ASCENDING]: By name after article, ascending
+     * - [DESCENDING]: By name after article, descending
      * - [ARTIST]: Grouped by artist and sorted [ASCENDING]
      * - [ALBUM]: [ASCENDING]
      * - [YEAR]: Sorted by year
@@ -75,43 +87,40 @@ enum class SortMode(@IdRes val itemId: Int) {
      */
     fun sortAlbums(albums: Collection<Album>): List<Album> {
         return when (this) {
-            ASCENDING, DESCENDING -> sortModels(albums)
+            ASCENDING, DESCENDING -> sortParents(albums)
 
-            ARTIST -> ASCENDING.sortModels(albums.groupBy { it.artist }.keys)
+            ARTIST -> ASCENDING.sortParents(albums.groupBy { it.artist }.keys)
                 .flatMap { YEAR.sortAlbums(it.albums) }
 
-            ALBUM -> ASCENDING.sortModels(albums)
+            ALBUM -> ASCENDING.sortParents(albums)
 
             YEAR -> albums.sortedByDescending { it.year }
         }
     }
 
     /**
-     * Sort a list of generic [BaseModel] instances.
+     * Sort a generic list of [Parent] instances.
      *
      * **Behavior:**
-     * - [ASCENDING]: Sorted by name, ascending
+     * - [ASCENDING]: By name after article, ascending
-     * - [DESCENDING]: Sorted by name, descending
+     * - [DESCENDING]: By name after article, descending
-     * - Same list is returned otherwise.
+     * - Same parent list is returned otherwise.
-     *
-     * Names will be treated as case-insensitive. Articles like "the" and "a" will be skipped
-     * to line up with MediaStore behavior.
      */
-    fun <T : BaseModel> sortModels(models: Collection<T>): List<T> {
+    fun <T : Parent> sortParents(parents: Collection<T>): List<T> {
         return when (this) {
-            ASCENDING -> models.sortedWith(
+            ASCENDING -> parents.sortedWith(
                 compareBy(String.CASE_INSENSITIVE_ORDER) { model ->
-                    model.name.sliceArticle()
+                    model.resolvedName.sliceArticle()
                 }
             )
 
-            DESCENDING -> models.sortedWith(
+            DESCENDING -> parents.sortedWith(
                 compareByDescending(String.CASE_INSENSITIVE_ORDER) { model ->
-                    model.name.sliceArticle()
+                    model.resolvedName.sliceArticle()
                 }
             )
 
-            else -> models.toList()
+            else -> parents.toList()
         }
     }
 

app/src/main/res/layout-land/fragment_playback.xml

@@ -80,7 +80,7 @@
             android:layout_marginStart="@dimen/spacing_mid_large"
             android:layout_marginEnd="@dimen/spacing_mid_large"
             android:onClick="@{() -> detailModel.navToItem(playbackModel.song.album.artist)}"
-            android:text="@{song.album.artist.name}"
+            android:text="@{song.album.artist.resolvedName}"
             app:layout_constraintBottom_toTopOf="@+id/playback_album"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintHorizontal_bias="0.5"

app/src/main/res/layout-xlarge-land/fragment_playback.xml

@@ -82,7 +82,7 @@
             android:layout_marginStart="@dimen/spacing_mid_large"
             android:layout_marginEnd="@dimen/spacing_mid_large"
             android:onClick="@{() -> detailModel.navToItem(playbackModel.song.album.artist)}"
-            android:text="@{song.album.artist.name}"
+            android:text="@{song.album.artist.resolvedName}"
             app:layout_constraintBottom_toTopOf="@+id/playback_album"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintHorizontal_bias="0.5"

app/src/main/res/layout-xlarge/fragment_playback.xml

@@ -70,7 +70,7 @@
             android:layout_marginStart="@dimen/spacing_mid_huge"
             android:layout_marginEnd="@dimen/spacing_mid_huge"
             android:onClick="@{() -> detailModel.navToItem(playbackModel.song.album.artist)}"
-            android:text="@{song.album.artist.name}"
+            android:text="@{song.album.artist.resolvedName}"
             app:layout_constraintBottom_toTopOf="@+id/playback_album"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"

app/src/main/res/layout/fragment_compact_playback.xml

@@ -58,7 +58,7 @@
             android:layout_marginStart="@dimen/spacing_small"
             android:layout_marginEnd="@dimen/spacing_small"
             android:ellipsize="end"
-            android:text="@{@string/fmt_two(song.album.artist.name, song.album.name)}"
+            android:text="@{@string/fmt_two(song.album.artist.resolvedName, song.album.name)}"
             app:layout_constraintBottom_toBottomOf="@+id/playback_cover"
             app:layout_constraintEnd_toStartOf="@+id/playback_play_pause"
             app:layout_constraintStart_toEndOf="@+id/playback_cover"

app/src/main/res/layout/fragment_playback.xml

@@ -69,7 +69,7 @@
             android:layout_marginStart="@dimen/spacing_mid_large"
             android:layout_marginEnd="@dimen/spacing_mid_large"
             android:onClick="@{() -> detailModel.navToItem(playbackModel.song.album.artist)}"
-            android:text="@{song.album.artist.name}"
+            android:text="@{song.album.artist.resolvedName}"
             app:layout_constraintBottom_toTopOf="@+id/playback_album"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"

app/src/main/res/layout/item_action_header.xml

@@ -20,7 +20,7 @@
             style="@style/Widget.Auxio.TextView.Header"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:text="@{header.name}"
+            android:text="@{header.string.resolve(context)}"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toTopOf="parent"

app/src/main/res/layout/item_album.xml

@@ -41,7 +41,7 @@
             style="@style/Widget.Auxio.TextView.Item.Secondary"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:text="@{@string/fmt_two(album.artist.name, @plurals/fmt_song_count(album.songs.size, album.songs.size))}"
+            android:text="@{@string/fmt_two(album.artist.resolvedName, @plurals/fmt_song_count(album.songs.size, album.songs.size))}"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toEndOf="@+id/album_cover"

app/src/main/res/layout/item_artist.xml

@@ -16,7 +16,7 @@
         <ImageView
             android:id="@+id/artist_image"
             style="@style/Widget.Auxio.Image.Normal"
-            android:contentDescription="@{@string/desc_artist_image(artist.name)}"
+            android:contentDescription="@{@string/desc_artist_image(artist.resolvedName)}"
             app:artistImage="@{artist}"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintStart_toStartOf="parent"
@@ -28,7 +28,7 @@
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             style="@style/Widget.Auxio.TextView.Item.Primary"
-            android:text="@{artist.name}"
+            android:text="@{artist.resolvedName}"
             app:layout_constraintBottom_toTopOf="@+id/artist_details"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toEndOf="@+id/artist_image"

app/src/main/res/layout/item_genre.xml

@@ -16,7 +16,7 @@
         <ImageView
             android:id="@+id/genre_image"
             style="@style/Widget.Auxio.Image.Normal"
-            android:contentDescription="@{@string/desc_genre_image(genre.name)}"
+            android:contentDescription="@{@string/desc_genre_image(genre.resolvedName)}"
             app:genreImage="@{genre}"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintStart_toStartOf="parent"

app/src/main/res/layout/item_genre_song.xml

@@ -44,7 +44,7 @@
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_marginEnd="@dimen/spacing_medium"
-            android:text="@{@string/fmt_two(song.album.artist.name, song.album.name)}"
+            android:text="@{@string/fmt_two(song.album.artist.resolvedName, song.album.name)}"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintEnd_toStartOf="@+id/song_duration"
             app:layout_constraintStart_toEndOf="@+id/album_cover"

app/src/main/res/layout/item_header.xml

@@ -15,6 +15,6 @@
         style="@style/Widget.Auxio.TextView.Header"
         android:layout_height="wrap_content"
         android:layout_width="match_parent"
-        android:text="@{header.name}"
+        android:text="@{header.string.resolve(context)}"
         tools:text="Songs" />
 </layout>

app/src/main/res/layout/item_queue_song.xml

@@ -69,7 +69,7 @@
                 android:layout_width="0dp"
                 android:layout_height="wrap_content"
                 android:layout_marginEnd="@dimen/spacing_medium"
-                android:text="@{@string/fmt_two(song.album.artist.name, song.album.name)}"
+                android:text="@{@string/fmt_two(song.album.artist.resolvedName, song.album.name)}"
                 app:layout_constraintBottom_toBottomOf="parent"
                 app:layout_constraintEnd_toStartOf="@+id/song_drag_handle"
                 app:layout_constraintStart_toEndOf="@+id/album_cover"

app/src/main/res/layout/item_song.xml

@@ -42,7 +42,7 @@
             style="@style/Widget.Auxio.TextView.Item.Secondary"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:text="@{@string/fmt_two(song.album.artist.name, song.album.name)}"
+            android:text="@{@string/fmt_two(song.album.artist.resolvedName, song.album.name)}"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toEndOf="@+id/album_cover"

app/src/main/res/values/dimens.xml

@@ -41,4 +41,9 @@
 
     <dimen name="popup_min_width">78dp</dimen>
     <dimen name="popup_padding_end">28dp</dimen>
+
+    <dimen name="widget_width_min">176dp</dimen>
+    <dimen name="widget_height_min">180dp</dimen>
+    <dimen name="widget_width_def">@dimen/widget_width_min</dimen>
+    <dimen name="widget_height_def">180dp</dimen>
 </resources>

app/src/main/res/values/strings.xml

@@ -134,8 +134,8 @@
     <string name="desc_artist_image">Artist Image for %s</string>
     <string name="desc_genre_image">Genre Image for %s</string>
 
-
     <!-- Default Namespace | Placeholder values -->
+    <string name="def_artist">Unknown Artist</string>
     <string name="def_genre">Unknown Genre</string>
     <string name="def_date">No Date</string>
     <string name="def_playback">No music playing</string>

app/src/main/res/xml-v31/widget_info.xml

@@ -1,14 +1,14 @@
 <?xml version="1.0" encoding="utf-8"?>
 <appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
     android:description="@string/info_widget_desc"
-    android:initialLayout="@layout/widget_small"
+    android:initialLayout="@layout/widget_minimal"
-    android:minResizeWidth="176dp"
+    android:minResizeWidth="@dimen/widget_width_min"
-    android:minResizeHeight="152dp"
+    android:minResizeHeight="@dimen/widget_height_min"
-    android:previewLayout="@layout/widget_small"
+    android:previewLayout="@layout/widget_minimal"
     android:previewImage="@drawable/ui_widget_preview"
     android:resizeMode="horizontal|vertical"
-    android:minWidth="176dp"
+    android:minWidth="@dimen/widget_width_def"
-    android:minHeight="180dp"
+    android:minHeight="@dimen/widget_height_def"
     android:targetCellWidth="3"
     android:targetCellHeight="3"
     android:updatePeriodMillis="0"

app/src/main/res/xml/widget_info.xml

@@ -1,10 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
-    android:initialLayout="@layout/widget_small"
+    android:initialLayout="@layout/widget_minimal"
-    android:minWidth="176dp"
+    android:minWidth="@dimen/widget_width_min"
-    android:minHeight="180dp"
+    android:minHeight="@dimen/widget_height_min"
-    android:minResizeWidth="176dp"
+    android:minResizeWidth="@dimen/widget_width_def"
-    android:minResizeHeight="152dp"
+    android:minResizeHeight="@dimen/widget_height_def"
     android:previewImage="@drawable/ui_widget_preview"
     android:resizeMode="horizontal|vertical"
     android:updatePeriodMillis="0"