105 lines
2.9 KiB
Dart
105 lines
2.9 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:flutter_hooks/flutter_hooks.dart';
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import 'package:lemmy_api_client/v2.dart';
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import '../comment_tree.dart';
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import '../hooks/infinite_scroll.dart';
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import 'comment.dart';
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import 'infinite_scroll.dart';
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import 'post.dart';
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import 'post_list_options.dart';
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typedef FetcherWithSorting<T> = Future<List<T>> Function(
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int page, int batchSize, SortType sortType);
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/// Infinite list of posts
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class SortableInfiniteList<T> extends HookWidget {
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final FetcherWithSorting<T> fetcher;
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final Widget Function(T) itemBuilder;
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final InfiniteScrollController controller;
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final Function onStyleChange;
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final Widget noItems;
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final SortType defaultSort;
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const SortableInfiniteList({
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@required this.fetcher,
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@required this.itemBuilder,
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this.controller,
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this.onStyleChange,
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this.noItems,
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this.defaultSort = SortType.active,
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}) : assert(fetcher != null),
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assert(itemBuilder != null),
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assert(defaultSort != null);
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@override
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Widget build(BuildContext context) {
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final defaultController = useInfiniteScrollController();
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final isc = controller ?? defaultController;
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final sort = useState(defaultSort);
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void changeSorting(SortType newSort) {
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sort.value = newSort;
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isc.clear();
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}
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return InfiniteScroll<T>(
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leading: PostListOptions(
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sortValue: sort.value,
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onSortChanged: changeSorting,
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styleButton: onStyleChange != null,
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),
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itemBuilder: itemBuilder,
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padding: EdgeInsets.zero,
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fetcher: (page, batchSize) => fetcher(page, batchSize, sort.value),
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controller: isc,
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batchSize: 20,
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noItems: noItems,
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);
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}
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}
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class InfinitePostList extends StatelessWidget {
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final FetcherWithSorting<PostView> fetcher;
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final InfiniteScrollController controller;
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const InfinitePostList({
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@required this.fetcher,
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this.controller,
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}) : assert(fetcher != null);
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Widget build(BuildContext context) => SortableInfiniteList<PostView>(
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onStyleChange: () {},
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itemBuilder: (post) => Column(
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children: [
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PostWidget(post),
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const SizedBox(height: 20),
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],
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),
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fetcher: fetcher,
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controller: controller,
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noItems: const Text('there are no posts'),
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);
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}
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class InfiniteCommentList extends StatelessWidget {
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final FetcherWithSorting<CommentView> fetcher;
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final InfiniteScrollController controller;
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const InfiniteCommentList({
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@required this.fetcher,
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this.controller,
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}) : assert(fetcher != null);
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Widget build(BuildContext context) => SortableInfiniteList<CommentView>(
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itemBuilder: (comment) => CommentWidget(
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CommentTree(comment),
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detached: true,
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),
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fetcher: fetcher,
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controller: controller,
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noItems: const Text('there are no comments'),
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);
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}
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