spotube/lib/services/queries/category.dart

import 'package:fl_query/fl_query.dart';
import 'package:hooks_riverpod/hooks_riverpod.dart';
import 'package:spotify/spotify.dart';
import 'package:spotube/hooks/use_spotify_infinite_query.dart';

class CategoryQueries {
  const CategoryQueries();

  InfiniteQuery<Page<Category>, dynamic, int> list(
      WidgetRef ref, String recommendationMarket) {
    return useSpotifyInfiniteQuery<Page<Category>, dynamic, int>(
      "category-playlists",
      (pageParam, spotify) async {
        final categories = await spotify.categories
            .list(country: recommendationMarket)
            .getPage(15, pageParam);

        return categories;
      },
      initialPage: 0,
      nextPage: (lastPage, pages) {
        if (pages.isEmpty) return lastPage + 1;
        return pages.last.isLast || (pages.last.items?.length ?? 0) < 15
            ? null
            : pages.last.nextOffset;
      },
      ref: ref,
    );
  }

  InfiniteQuery<Page<PlaylistSimple>, dynamic, int> playlistsOf(
    WidgetRef ref,
    String category,
  ) {
    return useSpotifyInfiniteQuery<Page<PlaylistSimple>, dynamic, int>(
      "category-playlists/$category",
      (pageParam, spotify) async {
        final playlists = await spotify.playlists
            .getByCategoryId(category)
            .getPage(5, pageParam);

        return playlists;
      },
      initialPage: 0,
      nextPage: (lastPage, pages) =>
          pages.last.isLast || (pages.last.items?.length ?? 0) < 5
              ? null
              : pages.last.nextOffset,
      ref: ref,
    );
  }
}