music: add setting to hide collaborators

Add a setting to hide "collaborators", that is artists that do not show
up on any album artist tags.

This is mostly for my own use since I don't get use from useless
collaborator entries.

CHANGELOG.md

@@ -7,6 +7,7 @@
 	- Added support for multiple artists
 	- Added support for multiple genres
 - Artists and album artists are now both given UI entires
+	- Added setting to hide "collaborator" artists
 - Upgraded music ID management:
 	- Added support for MusicBrainz IDs (MBIDs)
 	- Use the more unique MD5 hash of metadata when MBIDs can't be used

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

@@ -141,7 +141,15 @@ class HomeViewModel(application: Application) :
             logD("Library changed, refreshing library")
             _songs.value = settings.libSongSort.songs(library.songs)
             _albums.value = settings.libAlbumSort.albums(library.albums)
-            _artists.value = settings.libArtistSort.artists(library.artists)
+
+            _artists.value = settings.libArtistSort.artists(
+                if (settings.shouldHideCollaborators) {
+                    library.artists.filter { !it.isCollaborator }
+                } else {
+                    library.artists
+                }
+            )
+
             _genres.value = settings.libGenreSort.genres(library.genres)
         }
     }
@@ -151,6 +159,10 @@ class HomeViewModel(application: Application) :
             tabs = visibleTabs
             _shouldRecreateTabs.value = true
         }
+
+        if (key == application.getString(R.string.set_key_hide_collaborators)) {
+            onLibraryChanged(musicStore.library)
+        }
     }
 
     override fun onCleared() {

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

@@ -590,6 +590,9 @@ constructor(raw: Raw, songAlbums: List<Music>) : MusicParent() {
     /** The albums of this artist. This will never be empty. */
     val albums: List<Album>
 
+    /** Whether this artist is not credited on any albums. */
+    val isCollaborator: Boolean
+
     private lateinit var genres: List<Genre>
 
     /**
@@ -616,6 +619,8 @@ constructor(raw: Raw, songAlbums: List<Music>) : MusicParent() {
     init {
         val distinctSongs = mutableSetOf<Song>()
         val distinctAlbums = mutableSetOf<Album>()
+        
+        var noAlbums = true
 
         for (music in songAlbums) {
             when (music) {
@@ -628,6 +633,7 @@ constructor(raw: Raw, songAlbums: List<Music>) : MusicParent() {
                 is Album -> {
                     music._link(this)
                     distinctAlbums.add(music)
+                    noAlbums = false
                 }
 
                 else -> error("Unexpected input music ${music::class.simpleName}")
@@ -636,6 +642,7 @@ constructor(raw: Raw, songAlbums: List<Music>) : MusicParent() {
 
         songs = distinctSongs.toList()
         albums = distinctAlbums.toList()
+        isCollaborator = noAlbums
         durationMs = songs.sumOf { it.durationMs }.nonZeroOrNull()
     }
 

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

@@ -105,6 +105,10 @@ class Date private constructor(private val tokens: List<Int>) : Comparable<Date>
                 TemporalQueries.localDate()
             )
 
+            // When it comes to songs, we only want to show the month and year. This
+            // cannot be done with DateUtils due to it's dynamic nature, so instead
+            // it's done with the built-in date formatter. Since the legacy date API
+            // is awful, we only use instant and limit it to Android 8 onwards.
             temporal.atStartOfDay(ZoneId.systemDefault())
                 .format(DateTimeFormatter.ofPattern("MMM yyyy", Locale.getDefault()))
         } else {

app/src/main/java/org/oxycblt/auxio/settings/Settings.kt

@@ -204,9 +204,9 @@ class Settings(private val context: Context, private val callback: Callback? = n
             }
         }
 
-    /** The strategy used when loading images. */
-    val coverMode: CoverMode
-        get() = CoverMode.fromIntCode(inner.getInt(context.getString(R.string.set_key_cover_mode), Int.MIN_VALUE)) ?: CoverMode.MEDIA_STORE
+    /** Whether to hide collaborator artists or not. */
+    val shouldHideCollaborators: Boolean
+        get() = inner.getBoolean(context.getString(R.string.set_key_hide_collaborators), false)
 
     /** Whether to round additional UI elements (including album covers) */
     val roundMode: Boolean
@@ -296,6 +296,10 @@ class Settings(private val context: Context, private val callback: Callback? = n
     val shouldBeObserving: Boolean
         get() = inner.getBoolean(context.getString(R.string.set_key_observing), false)
 
+    /** The strategy used when loading images. */
+    val coverMode: CoverMode
+        get() = CoverMode.fromIntCode(inner.getInt(context.getString(R.string.set_key_cover_mode), Int.MIN_VALUE)) ?: CoverMode.MEDIA_STORE
+
     /** Whether to load all audio files, even ones not considered music. */
     val excludeNonMusic: Boolean
         get() = inner.getBoolean(context.getString(R.string.set_key_exclude_non_music), true)

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

@@ -5,11 +5,13 @@
     <string name="set_key_black_theme" translatable="false">KEY_BLACK_THEME</string>
     <string name="set_key_accent" translatable="false">auxio_accent2</string>
 
-    <string name="set_key_lib_tabs" translatable="false">auxio_lib_tabs</string>
+    <string name="set_key_reindex" translatable="false">auxio_reindex</string>
+    <string name="set_key_observing" translatable="false">auxio_observing</string>
+    <string name="set_key_music_dirs" translatable="false">auxio_music_dirs</string>
     <string name="set_key_cover_mode" translatable="false">auxio_cover_mode</string>
-    <string name="set_key_round_mode" translatable="false">auxio_round_covers</string>
-    <string name="set_key_bar_action" translatable="false">auxio_bar_action</string>
-    <string name="set_key_notif_action" translatable="false">auxio_notif_action</string>
+    <string name="set_key_music_dirs_include" translatable="false">auxio_include_dirs</string>
+    <string name="set_key_exclude_non_music" translatable="false">auxio_exclude_non_music</string>
+    <string name="set_key_separators" translatable="false">auxio_separators</string>
 
     <string name="set_key_headset_autoplay" translatable="false">auxio_headset_autoplay</string>
     <string name="set_key_replay_gain" translatable="false">auxio_replay_gain</string>
@@ -26,12 +28,11 @@
     <string name="set_key_wipe_state" translatable="false">auxio_wipe_state</string>
     <string name="set_key_restore_state" translatable="false">auxio_restore_state</string>
 
-    <string name="set_key_reindex" translatable="false">auxio_reindex</string>
-    <string name="set_key_observing" translatable="false">auxio_observing</string>
-    <string name="set_key_music_dirs" translatable="false">auxio_music_dirs</string>
-    <string name="set_key_music_dirs_include" translatable="false">auxio_include_dirs</string>
-    <string name="set_key_exclude_non_music" translatable="false">auxio_exclude_non_music</string>
-    <string name="set_key_separators" translatable="false">auxio_separators</string>
+    <string name="set_key_lib_tabs" translatable="false">auxio_lib_tabs</string>
+    <string name="set_key_hide_collaborators" translatable="false">auxio_hide_collaborators</string>
+    <string name="set_key_round_mode" translatable="false">auxio_round_covers</string>
+    <string name="set_key_bar_action" translatable="false">auxio_bar_action</string>
+    <string name="set_key_notif_action" translatable="false">auxio_notif_action</string>
 
     <string name="set_key_search_filter" translatable="false">KEY_SEARCH_FILTER</string>
 

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

@@ -169,6 +169,8 @@
     <string name="set_display">Display</string>
     <string name="set_lib_tabs">Library tabs</string>
     <string name="set_lib_tabs_desc">Change visibility and order of library tabs</string>
+    <string name="set_hide_collaborators">Hide collaborators</string>
+    <string name="set_hide_collaborators_desc">Only show artists that appear in the \'album artist\' tags in your library</string>
     <string name="set_cover_mode">Album covers</string>
     <string name="set_cover_mode_off">Off</string>
     <string name="set_cover_mode_media_store">Fast</string>

app/src/main/res/xml/prefs_main.xml

@@ -31,12 +31,11 @@
             app:summary="@string/set_lib_tabs_desc"
             app:title="@string/set_lib_tabs" />
 
-        <org.oxycblt.auxio.settings.prefs.IntListPreference
-            app:defaultValue="@integer/cover_mode_media_store"
-            app:entries="@array/entries_cover_mode"
-            app:entryValues="@array/values_cover_mode"
-            app:key="@string/set_key_cover_mode"
-            app:title="@string/set_cover_mode" />
+        <SwitchPreferenceCompat
+            app:key="@string/set_key_hide_collaborators"
+            app:summary="@string/set_hide_collaborators_desc"
+            app:title="@string/set_hide_collaborators"
+            app:defaultValue="false" />
 
         <SwitchPreferenceCompat
             app:defaultValue="false"
@@ -147,6 +146,13 @@
             app:summary="@string/set_observing_desc"
             app:title="@string/set_observing" />
 
+        <org.oxycblt.auxio.settings.prefs.IntListPreference
+            app:defaultValue="@integer/cover_mode_media_store"
+            app:entries="@array/entries_cover_mode"
+            app:entryValues="@array/values_cover_mode"
+            app:key="@string/set_key_cover_mode"
+            app:title="@string/set_cover_mode" />
+
         <org.oxycblt.auxio.settings.prefs.WrappedDialogPreference
             app:key="@string/set_key_music_dirs"
             app:summary="@string/set_dirs_desc"