songs list and serializable list query

lib/database/query.dart

@@ -0,0 +1,121 @@
+import 'package:fast_immutable_collections/fast_immutable_collections.dart';
+import 'package:freezed_annotation/freezed_annotation.dart';
+
+part 'query.freezed.dart';
+part 'query.g.dart';
+
+enum SortDirection {
+  asc,
+  desc,
+}
+
+enum AlbumsColumn {
+  name,
+  created,
+  year,
+  starred,
+}
+
+enum ArtistsColumn {
+  name,
+  starred,
+  albumCount,
+}
+
+enum SongsColumn {
+  title,
+  starred,
+  disc,
+  track,
+}
+
+@freezed
+abstract class SortingTerm with _$SortingTerm {
+  const factory SortingTerm.albums({
+    required SortDirection dir,
+    required AlbumsColumn by,
+  }) = AlbumsSortingTerm;
+
+  const factory SortingTerm.artists({
+    required SortDirection dir,
+    required ArtistsColumn by,
+  }) = ArtistsSortingTerm;
+
+  const factory SortingTerm.songs({
+    required SortDirection dir,
+    required SongsColumn by,
+  }) = SongsSortingTerm;
+
+  factory SortingTerm.fromJson(Map<String, Object?> json) =>
+      _$SortingTermFromJson(json);
+}
+
+@freezed
+abstract class AlbumsQuery with _$AlbumsQuery {
+  const factory AlbumsQuery({
+    required int sourceId,
+    @Default(IListConst([])) IList<AlbumsFilter> filter,
+    required IList<AlbumsSortingTerm> sort,
+    int? limit,
+    int? offset,
+  }) = _AlbumsQuery;
+
+  factory AlbumsQuery.fromJson(Map<String, Object?> json) =>
+      _$AlbumsQueryFromJson(json);
+}
+
+@freezed
+abstract class AlbumsFilter with _$AlbumsFilter {
+  const factory AlbumsFilter.artistId(String artistId) = AlbumsFilterArtistId;
+  const factory AlbumsFilter.yearEquals(int year) = AlbumsFilterYearEquals;
+
+  factory AlbumsFilter.fromJson(Map<String, Object?> json) =>
+      _$AlbumsFilterFromJson(json);
+}
+
+@freezed
+abstract class ArtistsQuery with _$ArtistsQuery {
+  const factory ArtistsQuery({
+    required int sourceId,
+    @Default(IListConst([])) IList<ArtistsFilter> filter,
+    required IList<ArtistsSortingTerm> sort,
+    int? limit,
+    int? offset,
+  }) = _ArtistsQuery;
+
+  factory ArtistsQuery.fromJson(Map<String, Object?> json) =>
+      _$ArtistsQueryFromJson(json);
+}
+
+@freezed
+abstract class ArtistsFilter with _$ArtistsFilter {
+  const factory ArtistsFilter.nameSearch(String name) = ArtistsFilterNameSearch;
+  const factory ArtistsFilter.starred(bool starred) = ArtistsFilterStarred;
+
+  factory ArtistsFilter.fromJson(Map<String, Object?> json) =>
+      _$ArtistsFilterFromJson(json);
+}
+
+@freezed
+abstract class SongsQuery with _$SongsQuery {
+  const factory SongsQuery({
+    required int sourceId,
+    @Default(IListConst([])) IList<SongsFilter> filter,
+    required IList<SongsSortingTerm> sort,
+    int? limit,
+    int? offset,
+  }) = _SongsQuery;
+
+  factory SongsQuery.fromJson(Map<String, Object?> json) =>
+      _$SongsQueryFromJson(json);
+}
+
+@freezed
+abstract class SongsFilter with _$SongsFilter {
+  const factory SongsFilter.albumId(String albumId) = SongsFilterAlbumId;
+  const factory SongsFilter.playlistId(String playlistId) =
+      SongsFilterPlaylistId;
+
+  factory SongsFilter.fromJson(Map<String, Object?> json) =>
+      _$SongsFilterFromJson(json);
+}