104 lines
3.0 KiB
Dart
104 lines
3.0 KiB
Dart
import 'package:auto_route/annotations.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/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: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 postAsync = ref.watch(postListProvider);
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return AppScaffold(
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appBar: AppBar(title: const Text('Explore')),
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body: postAsync.when(
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data:
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(controller) => RefreshIndicator(
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onRefresh: controller.refresh,
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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: controller.posts.length,
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isLoading: controller.isLoading,
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hasReachedMax: controller.hasReachedMax,
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onFetchData: controller.fetchMore,
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itemBuilder: (context, index) {
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final post = controller.posts[index];
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return PostItem(item: post);
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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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loading: () => const Center(child: CircularProgressIndicator()),
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error:
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(e, _) => GestureDetector(
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child: Center(
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child: Text('Error: $e', textAlign: TextAlign.center),
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),
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onTap: () {
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postAsync.value?.refresh();
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},
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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 = FutureProvider<_PostListController>((ref) async {
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final client = ref.watch(apiClientProvider);
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final controller = _PostListController(client);
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await controller.fetchMore();
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return controller;
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});
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class _PostListController {
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_PostListController(this._dio);
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final Dio _dio;
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final List<SnPost> posts = [];
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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> refresh() async {
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hasReachedMax = false;
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offset = 0;
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posts.clear();
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await fetchMore();
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}
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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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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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posts.addAll(fetched);
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offset += fetched.length;
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if (posts.length >= total) hasReachedMax = true;
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isLoading = false;
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}
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}
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