109 lines
3.3 KiB
Dart
109 lines
3.3 KiB
Dart
import 'dart:convert';
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import 'package:flutter/material.dart';
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import 'package:solian/models/pagination.dart';
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import 'package:solian/models/post.dart';
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import 'package:solian/router.dart';
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import 'package:solian/utils/service_url.dart';
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import 'package:infinite_scroll_pagination/infinite_scroll_pagination.dart';
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import 'package:flutter_gen/gen_l10n/app_localizations.dart';
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import 'package:http/http.dart' as http;
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import 'package:solian/widgets/indent_wrapper.dart';
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import 'package:solian/widgets/posts/item.dart';
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class ExploreScreen extends StatefulWidget {
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const ExploreScreen({super.key});
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@override
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State<ExploreScreen> createState() => _ExploreScreenState();
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}
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class _ExploreScreenState extends State<ExploreScreen> {
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final PagingController<int, Post> _pagingController =
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PagingController(firstPageKey: 0);
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final http.Client _client = http.Client();
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Future<void> fetchFeed(int pageKey) async {
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final offset = pageKey;
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const take = 5;
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var uri =
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getRequestUri('interactive', '/api/feed?take=$take&offset=$offset');
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var res = await _client.get(uri);
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if (res.statusCode == 200) {
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final result =
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PaginationResult.fromJson(jsonDecode(utf8.decode(res.bodyBytes)));
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final items =
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result.data?.map((x) => Post.fromJson(x)).toList() ?? List.empty();
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final isLastPage = (result.count - pageKey) < take;
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if (isLastPage || result.data == null) {
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_pagingController.appendLastPage(items);
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} else {
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final nextPageKey = pageKey + items.length;
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_pagingController.appendPage(items, nextPageKey);
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}
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} else {
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_pagingController.error = utf8.decode(res.bodyBytes);
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}
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}
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@override
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void initState() {
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super.initState();
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_pagingController.addPageRequestListener((pageKey) => fetchFeed(pageKey));
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}
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@override
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Widget build(BuildContext context) {
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return IndentWrapper(
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noSafeArea: true,
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floatingActionButton: FloatingActionButton(
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child: const Icon(Icons.edit),
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onPressed: () async {
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final did = await router.pushNamed("posts.moments.new");
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if (did == true) _pagingController.refresh();
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},
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),
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title: AppLocalizations.of(context)!.explore,
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child: RefreshIndicator(
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onRefresh: () => Future.sync(
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() => _pagingController.refresh(),
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),
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child: Center(
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child: Container(
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constraints: const BoxConstraints(maxWidth: 640),
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child: PagedListView<int, Post>.separated(
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pagingController: _pagingController,
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separatorBuilder: (context, index) =>
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const Divider(thickness: 0.3),
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builderDelegate: PagedChildBuilderDelegate<Post>(
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itemBuilder: (context, item, index) => GestureDetector(
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child: PostItem(item: item),
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onTap: () {
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router.pushNamed(
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'posts.screen',
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pathParameters: {
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'alias': item.alias,
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'dataset': '${item.modelType}s',
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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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),
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),
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),
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);
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}
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@override
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void dispose() {
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_pagingController.dispose();
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super.dispose();
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}
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}
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