385 lines
13 KiB
Dart
385 lines
13 KiB
Dart
// Author: fruit.com.cn
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import 'dart:async';
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import 'package:flutter/material.dart';
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import 'package:provider/provider.dart';
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import '../../../core/data/models/content_category.dart';
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import '../../../core/data/models/drama.dart';
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import '../../../core/data/services/auth_controller.dart';
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import '../../../core/data/services/category_controller.dart';
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import '../../../core/data/services/home_feed_controller.dart';
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import '../../../core/data/services/wallet_controller.dart';
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import '../../../core/theme/app_colors.dart';
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import '../../../core/theme/app_dimens.dart';
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import '../../../core/widgets/app_pull_to_refresh.dart';
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import '../../../core/widgets/empty_state.dart';
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import '../../../core/widgets/paged_list_footer.dart';
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import '../../../l10n/app_localizations.dart';
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import 'home_drama_classification.dart';
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import 'home_feed_card.dart';
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import 'home_grid_header.dart';
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const double _loadMoreThreshold = 240;
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const List<String> _costumeAliases = ['古装', 'costume', 'period'];
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const List<String> _communityAliases = ['社群', 'community', 'komunitas'];
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class HomeFeedGrid extends StatefulWidget {
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const HomeFeedGrid({
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super.key,
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required this.feedController,
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required this.callbacks,
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required this.onOpenDrama,
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});
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final HomeFeedController feedController;
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final HomeGridCallbacks callbacks;
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final ValueChanged<Drama> onOpenDrama;
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@override
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State<HomeFeedGrid> createState() => _HomeFeedGridState();
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}
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class _HomeFeedGridState extends State<HomeFeedGrid> {
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HomePrimaryTab _selectedPrimary = HomePrimaryTab.featured;
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final PageController _pageController = PageController();
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final Map<HomePrimaryTab, ScrollController> _scrollControllers = {
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for (final tab in HomePrimaryTab.values) tab: ScrollController(),
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};
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final Map<HomePrimaryTab, String?> _selectedTags = {
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for (final tab in HomePrimaryTab.values) tab: null,
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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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WidgetsBinding.instance.addPostFrameCallback((_) {
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if (mounted && _pageController.hasClients) {
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_pageController.jumpToPage(_selectedPrimary.index);
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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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_pageController.dispose();
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for (final controller in _scrollControllers.values) {
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controller.dispose();
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}
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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final l10n = AppLocalizations.of(context)!;
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final categories = context.watch<CategoryController>().categories;
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final auth = context.watch<AuthController>();
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final wallet = context.watch<WalletController>();
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final shortcuts = _categoryShortcuts(categories, l10n);
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final tags = _availableTags(l10n);
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final activeTag =
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tags.any((tag) => tag.id == _selectedTags[_selectedPrimary])
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? _selectedTags[_selectedPrimary]
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: null;
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final walletBadge = auth.isSignedIn && wallet.snapshot != null
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? wallet.balance
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: null;
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return ColoredBox(
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key: const Key('home-grid'),
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color: AppColors.appBackground,
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child: SafeArea(
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bottom: false,
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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HomeGridHeader(
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callbacks: widget.callbacks,
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categories: shortcuts,
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tags: tags,
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selectedPrimary: _selectedPrimary,
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selectedTag: activeTag,
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onPrimarySelected: _selectPrimary,
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onTagSelected: (tag) =>
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setState(() => _selectedTags[_selectedPrimary] = tag),
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walletBadge: walletBadge,
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),
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Expanded(
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child: PageView.builder(
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key: const Key('home-primary-page-view'),
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controller: _pageController,
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itemCount: HomePrimaryTab.values.length,
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onPageChanged: (index) => setState(
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() => _selectedPrimary = HomePrimaryTab.values[index],
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),
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itemBuilder: (context, index) => _KeepAlivePage(
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key: PageStorageKey(
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'home-primary-page-${HomePrimaryTab.values[index].name}',
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),
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child: _tabGrid(
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context,
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l10n,
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tab: HomePrimaryTab.values[index],
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shortcuts: shortcuts,
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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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void _selectPrimary(HomePrimaryTab tab) {
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if (tab == _selectedPrimary) return;
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if (!_pageController.hasClients) {
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setState(() => _selectedPrimary = tab);
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return;
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}
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unawaited(
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_pageController.animateToPage(
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tab.index,
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duration: AppDimens.homePrimaryTabAnimationDuration,
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curve: Curves.easeOut,
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),
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);
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}
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Widget _tabGrid(
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BuildContext context,
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AppLocalizations l10n, {
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required HomePrimaryTab tab,
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required List<HomeGridCategoryShortcut> shortcuts,
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}) {
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final tag = _selectedTags[tab];
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final dramas = _dramasFor(tab, tag, shortcuts);
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return LayoutBuilder(
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builder: (context, constraints) {
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final itemWidth =
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(constraints.maxWidth -
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AppDimens.feedPageHorizontal * 2 -
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AppDimens.homeGridGap * 2) /
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3;
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final itemExtent =
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itemWidth / AppDimens.cardCoverAspectRatio +
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AppDimens.homeCardBodyExtent;
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return NotificationListener<ScrollNotification>(
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onNotification: _onScroll,
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child: AppPullToRefresh(
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key: const Key('home-grid-refresh'),
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onRefresh: _refresh,
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child: CustomScrollView(
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key: const Key('home-grid-scroll'),
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controller: _scrollControllers[tab],
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physics: AppPullToRefresh.physics,
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slivers: [
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if (widget.feedController.loadingFirstPage)
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const SliverFillRemaining(
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hasScrollBody: false,
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child: Center(
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child: SizedBox.square(
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dimension: 24,
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child: CircularProgressIndicator(strokeWidth: 2),
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),
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),
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)
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else if (dramas.isEmpty)
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SliverFillRemaining(
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hasScrollBody: false,
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child: _emptyState(l10n, tab, tag),
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)
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else
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SliverPadding(
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padding: const EdgeInsets.symmetric(
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horizontal: AppDimens.feedPageHorizontal,
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),
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sliver: SliverGrid(
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key: const Key('home-grid-cards'),
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gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
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crossAxisCount: 3,
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crossAxisSpacing: AppDimens.homeGridGap,
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mainAxisSpacing: AppDimens.homeGridRowGap,
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mainAxisExtent: itemExtent,
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),
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delegate: SliverChildBuilderDelegate(
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(context, index) => HomeFeedCard(
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drama: dramas[index],
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onTap: () => widget.onOpenDrama(dramas[index]),
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),
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childCount: dramas.length,
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),
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),
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),
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if (dramas.isNotEmpty)
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SliverToBoxAdapter(
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child: Padding(
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padding: const EdgeInsets.only(bottom: AppDimens.spaceXl),
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child: PagedListFooter(
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loading: widget.feedController.loadingMore,
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hasMore: widget.feedController.hasMore,
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hasItems: dramas.isNotEmpty,
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errorMessage: widget.feedController.lastError == null
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? null
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: l10n.catalogError,
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onRetry: widget.feedController.loadMore,
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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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Future<void> _refresh() async {
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await widget.feedController.refreshCurrent();
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}
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bool _onScroll(ScrollNotification notification) {
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if (notification.depth != 0) return false;
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final reachedBottom =
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notification.metrics.extentAfter <= _loadMoreThreshold;
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if (reachedBottom &&
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(notification is ScrollUpdateNotification ||
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notification is ScrollEndNotification ||
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notification is OverscrollNotification)) {
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unawaited(widget.feedController.loadMore());
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}
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return false;
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}
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List<HomeGridCategoryShortcut> _categoryShortcuts(
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List<ContentCategory> categories,
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AppLocalizations l10n,
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) {
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final costume = _findCategory(categories, _costumeAliases);
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final community = _findCategory(categories, _communityAliases);
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return [
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HomeGridCategoryShortcut(
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label: l10n.homeSectionCostume,
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categoryName: costume?.name ?? '',
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tab: HomePrimaryTab.costume,
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),
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HomeGridCategoryShortcut(
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label: l10n.homeSectionCommunity,
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categoryName: community?.name ?? '',
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tab: HomePrimaryTab.community,
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),
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];
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}
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ContentCategory? _findCategory(
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List<ContentCategory> categories,
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List<String> aliases,
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) {
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for (final category in categories) {
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final name = category.name.toLowerCase();
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if (aliases.any(name.contains)) return category;
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}
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return null;
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}
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List<HomeGridTagOption> _availableTags(AppLocalizations l10n) {
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// UI 先完整展示筛选维度；后续接口补齐题材字段时只替换数据来源。
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return [
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HomeGridTagOption(id: 'hot', label: l10n.homeTagHot),
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HomeGridTagOption(id: 'uplifting', label: l10n.homeTagUplifting),
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HomeGridTagOption(id: 'sweet', label: l10n.homeTagSweet),
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HomeGridTagOption(id: 'faceSlap', label: l10n.homeTagFaceSlap),
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HomeGridTagOption(id: 'angst', label: l10n.homeTagAngst),
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];
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}
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List<Drama> _dramasFor(
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HomePrimaryTab tab,
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String? tag,
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List<HomeGridCategoryShortcut> shortcuts,
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) {
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Iterable<Drama> source = widget.feedController.dramas;
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if (tab == HomePrimaryTab.costume || tab == HomePrimaryTab.community) {
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final categoryName = shortcuts
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.firstWhere((shortcut) => shortcut.tab == tab)
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.categoryName
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.toLowerCase();
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if (categoryName.isEmpty) return const [];
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source = source.where(
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(drama) =>
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drama.category.toLowerCase().contains(categoryName) ||
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drama.genre.toLowerCase().contains(categoryName),
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);
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}
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if (tag != null) {
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source = source.where((drama) => matchesHomeTag(drama, tag));
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}
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final dramas = source.toList(growable: false);
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switch (tab) {
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case HomePrimaryTab.newReleases:
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return [...dramas]..sort((a, b) {
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final left = publishedAtForDrama(a);
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final right = publishedAtForDrama(b);
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if (left == null && right == null) return b.id.compareTo(a.id);
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if (left == null) return 1;
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if (right == null) return -1;
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return right.compareTo(left);
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});
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case HomePrimaryTab.ranking:
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return [...dramas]..sort((a, b) => b.viewCount.compareTo(a.viewCount));
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case HomePrimaryTab.featured:
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case HomePrimaryTab.categories:
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case HomePrimaryTab.costume:
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case HomePrimaryTab.community:
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return dramas;
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}
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}
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Widget _emptyState(AppLocalizations l10n, HomePrimaryTab tab, String? tag) {
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if (widget.feedController.lastError != null) {
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return EmptyState(
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key: const Key('home-grid-error'),
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icon: Icons.cloud_off_rounded,
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title: l10n.catalogError,
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actionLabel: l10n.retry,
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onAction: () => unawaited(widget.feedController.refreshCurrent()),
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);
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}
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final filtered =
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tab == HomePrimaryTab.costume ||
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tab == HomePrimaryTab.community ||
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tag != null;
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return EmptyState(
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key: const Key('home-grid-empty'),
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icon: Icons.movie_filter_outlined,
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title: filtered ? l10n.homeGridFilterEmpty : l10n.noStories,
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subtitle: filtered ? null : l10n.emptyHint,
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actionLabel: filtered ? l10n.homeGridClearFilter : null,
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onAction: filtered
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? () => setState(() => _selectedTags[tab] = null)
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: null,
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);
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}
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}
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class _KeepAlivePage extends StatefulWidget {
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const _KeepAlivePage({super.key, required this.child});
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final Widget child;
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@override
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State<_KeepAlivePage> createState() => _KeepAlivePageState();
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}
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class _KeepAlivePageState extends State<_KeepAlivePage>
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with AutomaticKeepAliveClientMixin {
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@override
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bool get wantKeepAlive => true;
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@override
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Widget build(BuildContext context) {
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super.build(context);
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return widget.child;
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}
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}
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