feat: add support for album artists metadata

lib/common/data/audio.dart

@@ -294,8 +294,8 @@ class Audio {
       artist: data.artist,
       title: (data.title?.isNotEmpty == true ? data.title : fileName) ?? path,
       album: data.album,
-      // TODO(#339): wait for https://github.com/ClementBeal/audio_metadata_reader/issues/13
-      albumArtist: data.artist,
+      albumArtist:
+          data.performers.isEmpty ? data.artist : data.performers.toString(),
       discNumber: data.discNumber,
       discTotal: data.totalDisc,
       durationMs: data.duration?.inMilliseconds.toDouble(),

lib/local_audio/local_audio_view.dart

@@ -3,15 +3,15 @@ import '../l10n/l10n.dart';
 enum LocalAudioView {
   titles,
   artists,
-  // albumArtists,
+  albumArtists,
   albums,
   genres,
   playlists;
 
   String localize(AppLocalizations l10n) => switch (this) {
         titles => l10n.titles,
         artists => l10n.artists,
-        // albumArtists => l10n.albumArtists,
+        albumArtists => l10n.albumArtists,
         albums => l10n.albums,
         genres => l10n.genres,
         playlists => l10n.playlists,

lib/local_audio/view/local_audio_body.dart

@@ -1,10 +1,10 @@
 import 'package:flutter/material.dart';
 
 import '../../common/data/audio.dart';
+import '../local_audio_view.dart';
 import 'album_view.dart';
 import 'artists_view.dart';
 import 'genres_view.dart';
-import '../local_audio_view.dart';
 import 'playlists_view.dart';
 import 'titles_view.dart';
 
@@ -43,11 +43,11 @@ class LocalAudioBody extends StatelessWidget {
             noResultMessage: noResultMessage,
             noResultIcon: noResultIcon,
           ),
-        // LocalAudioView.albumArtists => AlbumArtistsView(
-        //     albumArtists: albumArtists,
-        //     noResultMessage: noResultMessage,
-        //     noResultIcon: noResultIcon,
-        //   ),
+        LocalAudioView.albumArtists => AlbumArtistsView(
+            albumArtists: albumArtists,
+            noResultMessage: noResultMessage,
+            noResultIcon: noResultIcon,
+          ),
         LocalAudioView.albums => AlbumsView(
             albums: albums,
             noResultMessage: noResultMessage,

lib/local_audio/view/local_audio_page.dart

@@ -5,6 +5,7 @@ import 'package:watch_it/watch_it.dart';
 import '../../common/data/audio_type.dart';
 import '../../common/view/adaptive_container.dart';
 import '../../common/view/header_bar.dart';
+import '../../common/view/no_search_result_page.dart';
 import '../../common/view/search_button.dart';
 import '../../common/view/sliver_filter_app_bar.dart';
 import '../../common/view/theme.dart';
@@ -83,39 +84,44 @@ class _LocalAudioPageState extends State<LocalAudioPage> {
         builder: (context, constraints) {
           return CustomScrollView(
             slivers: [
-              SliverFilterAppBar(
-                padding: getAdaptiveHorizontalPadding(constraints: constraints)
-                    .copyWith(
-                  bottom: filterPanelPadding.bottom,
-                  top: filterPanelPadding.top,
+              if (audios != null && audios.isNotEmpty)
+                SliverFilterAppBar(
+                  padding:
+                      getAdaptiveHorizontalPadding(constraints: constraints)
+                          .copyWith(
+                    bottom: filterPanelPadding.bottom,
+                    top: filterPanelPadding.top,
+                  ),
+                  title: const LocalAudioControlPanel(),
                 ),
-                title: const LocalAudioControlPanel(),
-              ),
               SliverPadding(
                 padding: getAdaptiveHorizontalPadding(constraints: constraints)
                     .copyWith(
                   bottom: bottomPlayerPageGap,
                 ),
-                sliver: LocalAudioBody(
-                  localAudioView: localAudioView,
-                  titles: audios,
-                  albums: allAlbums,
-                  artists: allArtists,
-                  albumArtists: allAlbumArtists,
-                  genres: allGenres,
-                  playlists: playlists,
-                  noResultIcon: const AnimatedEmoji(AnimatedEmojis.bird),
-                  noResultMessage: Column(
-                    mainAxisSize: MainAxisSize.min,
-                    children: [
-                      Text(context.l10n.noLocalTitlesFound),
-                      const SizedBox(
-                        height: kLargestSpace,
+                sliver: audios != null && audios.isEmpty
+                    ? SliverFillNoSearchResultPage(
+                        icon: const AnimatedEmoji(AnimatedEmojis.bird),
+                        message: Column(
+                          mainAxisSize: MainAxisSize.min,
+                          children: [
+                            Text(context.l10n.noLocalTitlesFound),
+                            const SizedBox(
+                              height: kLargestSpace,
+                            ),
+                            const SettingsButton.important(),
+                          ],
+                        ),
+                      )
+                    : LocalAudioBody(
+                        localAudioView: localAudioView,
+                        titles: audios,
+                        albums: allAlbums,
+                        artists: allArtists,
+                        albumArtists: allAlbumArtists,
+                        genres: allGenres,
+                        playlists: playlists,
                       ),
-                      const SettingsButton.important(),
-                    ],
-                  ),
-                ),
               ),
             ],
           );

lib/search/search_type.dart

@@ -4,7 +4,7 @@ import '../l10n/l10n.dart';
 enum SearchType {
   localTitle,
   localArtist,
-  // localAlbumArtist,
+  localAlbumArtist,
   localAlbum,
   localGenreName,
   localPlaylists,
@@ -17,7 +17,7 @@ enum SearchType {
   String localize(AppLocalizations l10n) => switch (this) {
         localTitle => l10n.titles,
         localArtist => l10n.artists,
-        // localAlbumArtist => l10n.albumArtists,
+        localAlbumArtist => l10n.albumArtists,
         localAlbum => l10n.albums,
         localGenreName => l10n.genres,
         localPlaylists => l10n.playlists,

lib/search/view/sliver_local_search_results.dart

@@ -42,7 +42,7 @@ class _SliverLocalSearchResultState extends State<SliverLocalSearchResult> {
       (SearchModel m) => switch (m.searchType) {
         SearchType.localAlbum => LocalAudioView.albums,
         SearchType.localArtist => LocalAudioView.artists,
-        // SearchType.localAlbumArtist => LocalAudioView.albumArtists,
+        SearchType.localAlbumArtist => LocalAudioView.albumArtists,
         SearchType.localTitle => LocalAudioView.titles,
         SearchType.localGenreName => LocalAudioView.genres,
         _ => LocalAudioView.playlists,

lib/search/view/sliver_search_type_filter_bar.dart

@@ -62,8 +62,8 @@ class SearchTypeFilterBar extends StatelessWidget with WatchItMixin {
             ' (${localSearchResult?.albums?.length ?? '0'})',
           SearchType.localArtist =>
             ' (${localSearchResult?.artists?.length ?? '0'})',
-          // SearchType.localAlbumArtist =>
-          //   ' (${localSearchResult?.albumArtists?.length ?? '0'})',
+          SearchType.localAlbumArtist =>
+            ' (${localSearchResult?.albumArtists?.length ?? '0'})',
           SearchType.localGenreName =>
             ' (${localSearchResult?.genres?.length ?? '0'})',
           SearchType.localPlaylists =>