121 lines
3.6 KiB
Dart
121 lines
3.6 KiB
Dart
import 'package:auto_route/auto_route.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter_riverpod/flutter_riverpod.dart';
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import 'package:island/route.gr.dart';
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import 'package:island/widgets/app_scaffold.dart';
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import 'package:island/models/post.dart';
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import 'package:island/widgets/post/post_item.dart';
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import 'package:material_symbols_icons/symbols.dart';
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import 'package:very_good_infinite_list/very_good_infinite_list.dart';
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import 'package:dio/dio.dart';
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import 'package:island/pods/network.dart';
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@RoutePage()
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class ExploreScreen extends ConsumerWidget {
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const ExploreScreen({super.key});
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@override
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Widget build(BuildContext context, WidgetRef ref) {
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final posts = ref.watch(postListProvider);
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final postsNotifier = ref.watch(postListProvider.notifier);
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return AppScaffold(
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appBar: AppBar(title: const Text('Explore')),
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floatingActionButton: FloatingActionButton(
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heroTag: Key("explore-page-fab"),
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onPressed: () {
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context.router.push(PostComposeRoute()).then((value) {
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if (value != null) {
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ref.invalidate(postListProvider);
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}
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});
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},
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child: const Icon(Symbols.edit),
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),
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floatingActionButtonLocation: FloatingActionButtonLocation.endFloat,
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body: RefreshIndicator(
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onRefresh:
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() => Future.sync((() {
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ref.invalidate(postListProvider);
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})),
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child: InfiniteList(
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padding: EdgeInsets.only(
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bottom: MediaQuery.of(context).padding.bottom,
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),
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itemCount: posts.length,
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isLoading: postsNotifier.isLoading,
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hasReachedMax: postsNotifier.hasReachedMax,
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onFetchData: postsNotifier.fetchMore,
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itemBuilder: (context, index) {
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final post = posts[index];
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return PostItem(
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item: post,
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onRefresh: (_) {
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ref.invalidate(postListProvider);
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},
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onUpdate: (post) {
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postsNotifier.updateOne(index, post);
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},
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);
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},
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separatorBuilder: (_, __) => const Divider(height: 1),
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),
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),
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);
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}
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}
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final postListProvider =
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StateNotifierProvider<_PostListController, List<SnPost>>((ref) {
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final client = ref.watch(apiClientProvider);
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return _PostListController(client);
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});
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class _PostListController extends StateNotifier<List<SnPost>> {
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_PostListController(this._dio) : super([]);
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final Dio _dio;
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bool isLoading = false;
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bool hasReachedMax = false;
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int offset = 0;
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final int take = 20;
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int total = 0;
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Future<void> fetchMore() async {
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if (isLoading || hasReachedMax) return;
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isLoading = true;
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try {
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final response = await _dio.get(
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'/posts',
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queryParameters: {'offset': offset, 'take': take},
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);
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final List<SnPost> fetched =
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(response.data as List)
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.map((e) => SnPost.fromJson(e as Map<String, dynamic>))
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.toList();
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final headerTotal = int.tryParse(response.headers['x-total']?.first ?? '');
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if (headerTotal != null) total = headerTotal;
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if (!mounted) return; // Check if the notifier is still mounted
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state = [...state, ...fetched];
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offset += fetched.length;
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if (state.length >= total) hasReachedMax = true;
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} finally {
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if (mounted) {
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isLoading = false;
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}
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}
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}
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void updateOne(int index, SnPost post) {
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if (!mounted) return; // Check if the notifier is still mounted
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final updatedPosts = [...state];
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updatedPosts[index] = post;
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state = updatedPosts;
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}
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}
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