spotube/lib/pages/home/personalized.dart

import 'package:flutter/material.dart' hide Page;
import 'package:flutter_hooks/flutter_hooks.dart';
import 'package:hooks_riverpod/hooks_riverpod.dart';

import 'package:spotify/spotify.dart';
import 'package:spotube/components/shared/horizontal_playbutton_card_view/horizontal_playbutton_card_view.dart';
import 'package:spotube/extensions/context.dart';
import 'package:spotube/provider/authentication_provider.dart';
import 'package:spotube/services/queries/queries.dart';
import 'package:spotube/utils/type_conversion_utils.dart';
import 'package:skeletonizer/skeletonizer.dart';

class PersonalizedPage extends HookConsumerWidget {
  const PersonalizedPage({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context, ref) {
    final controller = useScrollController();
    final auth = ref.watch(AuthenticationNotifier.provider);
    final featuredPlaylistsQuery = useQueries.playlist.featured(ref);
    final playlists = useMemoized(
      () => featuredPlaylistsQuery.pages
          .whereType<Page<PlaylistSimple>>()
          .expand((page) => page.items ?? const <PlaylistSimple>[]),
      [featuredPlaylistsQuery.pages],
    );

    final madeForUser = useQueries.views.get(ref, "made-for-x-hub");

    final newReleases = useQueries.album.newReleases(ref);
    final userArtistsQuery = useQueries.artist.followedByMeAll(ref);
    final userArtists =
        userArtistsQuery.data?.map((s) => s.id!).toList() ?? const [];

    final albums = useMemoized(
      () => newReleases.pages
          .whereType<Page<AlbumSimple>>()
          .expand((page) => page.items ?? const <AlbumSimple>[])
          .where((album) {
            return album.artists
                    ?.any((artist) => userArtists.contains(artist.id!)) ==
                true;
          })
          .map((album) => TypeConversionUtils.simpleAlbum_X_Album(album))
          .toList(),
      [newReleases.pages],
    );

    final hasNewReleases = newReleases.hasPageData &&
        userArtistsQuery.hasData &&
        !newReleases.isLoadingNextPage;

    final isLoadingFeaturedPlaylists = !featuredPlaylistsQuery.hasPageData &&
        !featuredPlaylistsQuery.isLoadingNextPage;

    return CustomScrollView(
      controller: controller,
      slivers: [
        SliverList.list(
          children: [
            Skeletonizer(
              enabled: isLoadingFeaturedPlaylists,
              child: HorizontalPlaybuttonCardView<PlaylistSimple>(
                items: playlists.toList(),
                title: Text(context.l10n.featured),
                isLoadingNextPage: featuredPlaylistsQuery.isLoadingNextPage,
                hasNextPage: featuredPlaylistsQuery.hasNextPage,
                onFetchMore: featuredPlaylistsQuery.fetchNext,
              ),
            ),
            if (auth != null || hasNewReleases)
              HorizontalPlaybuttonCardView<Album>(
                items: albums,
                title: Text(context.l10n.new_releases),
                isLoadingNextPage: newReleases.isLoadingNextPage,
                hasNextPage: newReleases.hasNextPage,
                onFetchMore: newReleases.fetchNext,
              ),
          ],
        ),
        SliverSafeArea(
          sliver: SliverList.builder(
            itemCount: madeForUser.data?["content"]?["items"]?.length ?? 0,
            itemBuilder: (context, index) {
              final item = madeForUser.data?["content"]?["items"]?[index];
              final playlists = item["content"]?["items"]
                      ?.where((itemL2) => itemL2["type"] == "playlist")
                      .map((itemL2) => PlaylistSimple.fromJson(itemL2))
                      .toList()
                      .cast<PlaylistSimple>() ??
                  <PlaylistSimple>[];
              if (playlists.isEmpty) return const SizedBox.shrink();
              return HorizontalPlaybuttonCardView<PlaylistSimple>(
                items: playlists,
                title: Text(item["name"] ?? ""),
                hasNextPage: false,
                isLoadingNextPage: false,
                onFetchMore: () {},
              );
            },
          ),
        ),
      ],
    );
  }
}