359 lines
12 KiB
Dart
359 lines
12 KiB
Dart
import 'package:cached_network_image/cached_network_image.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:go_router/go_router.dart';
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import '../../core/theme/app_theme.dart';
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import '../../models/video_item.dart';
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import '../../providers/search_provider.dart';
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/// 搜索页（《01-开发文档》2.5.8）：
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/// 默认页：本地搜索历史（最近 10 条）+ 热搜榜 Top10
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/// 结果页：热度/最新排序切换 + 双列封面网格，点击进单视频播放页
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class SearchScreen extends ConsumerStatefulWidget {
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const SearchScreen({super.key});
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@override
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ConsumerState<SearchScreen> createState() => _SearchScreenState();
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}
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class _SearchScreenState extends ConsumerState<SearchScreen> {
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final _inputController = TextEditingController();
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final _scrollController = ScrollController();
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@override
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void initState() {
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super.initState();
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ref.read(searchProvider.notifier).loadHot();
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_scrollController.addListener(_onScroll);
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}
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@override
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void dispose() {
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_inputController.dispose();
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_scrollController.dispose();
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super.dispose();
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}
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void _onScroll() {
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if (_scrollController.position.pixels >
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_scrollController.position.maxScrollExtent - 200) {
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ref.read(searchProvider.notifier).loadMore();
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}
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}
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void _submit(String keyword) =>
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ref.read(searchProvider.notifier).search(keyword);
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@override
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Widget build(BuildContext context) {
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final state = ref.watch(searchProvider);
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final notifier = ref.read(searchProvider.notifier);
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return Scaffold(
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body: SafeArea(
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child: Column(
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children: [
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// 搜索输入栏
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Padding(
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padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 8),
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child: Row(
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children: [
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IconButton(
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icon: const Icon(Icons.arrow_back_ios, size: 20),
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onPressed: () => context.pop(),
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),
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Expanded(
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child: TextField(
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controller: _inputController,
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autofocus: true,
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maxLength: 30,
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textInputAction: TextInputAction.search,
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onSubmitted: _submit,
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style: const TextStyle(fontSize: 14),
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decoration: const InputDecoration(
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hintText: '搜索视频标题或标签',
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counterText: '',
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isDense: true,
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contentPadding: EdgeInsets.symmetric(
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horizontal: 12,
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vertical: 10,
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),
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),
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),
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),
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TextButton(
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onPressed: () => _submit(_inputController.text),
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child: const Text(
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'搜索',
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style: TextStyle(
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color: AppColors.primary,
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fontWeight: FontWeight.w600,
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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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// 内容：默认页 / 结果页
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Expanded(
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child: state.searched
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? _buildResults(state, notifier)
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: _buildDefault(state, notifier),
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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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/// 默认页：搜索历史 + 热搜榜
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Widget _buildDefault(SearchState state, SearchNotifier notifier) {
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return ListView(
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padding: const EdgeInsets.symmetric(horizontal: 16),
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children: [
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if (state.history.isNotEmpty) ...[
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Row(
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children: [
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const Expanded(
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child: Text(
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'搜索历史',
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style: TextStyle(
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fontSize: 15,
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fontWeight: FontWeight.w600,
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),
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),
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),
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IconButton(
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icon: const Icon(Icons.delete_outline,
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size: 20, color: AppColors.textSecondary),
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onPressed: notifier.clearHistory,
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),
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],
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),
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Wrap(
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spacing: 8,
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runSpacing: 8,
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children: [
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for (final word in state.history)
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GestureDetector(
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onTap: () {
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_inputController.text = word;
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_submit(word);
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},
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child: Container(
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padding: const EdgeInsets.symmetric(
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horizontal: 12,
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vertical: 6,
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),
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decoration: BoxDecoration(
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color: AppColors.surface,
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borderRadius: BorderRadius.circular(16),
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),
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child: Text(
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word,
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style: const TextStyle(
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color: AppColors.textSecondary,
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fontSize: 13,
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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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const SizedBox(height: 24),
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],
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const Text(
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'热搜榜',
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style: TextStyle(fontSize: 15, fontWeight: FontWeight.w600),
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),
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const SizedBox(height: 8),
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if (state.hotWords.isEmpty)
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const Padding(
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padding: EdgeInsets.symmetric(vertical: 24),
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child: Center(
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child: Text(
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'暂无热搜',
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style: TextStyle(color: AppColors.textWeak),
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),
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),
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)
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else
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for (var i = 0; i < state.hotWords.length; i++)
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ListTile(
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dense: true,
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contentPadding: EdgeInsets.zero,
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leading: SizedBox(
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width: 24,
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child: Text(
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'${i + 1}',
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style: TextStyle(
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fontSize: 15,
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fontWeight: FontWeight.w700,
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// 前三名品牌红，其余灰色
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color: i < 3 ? AppColors.primary : AppColors.textWeak,
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),
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),
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),
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title: Text(state.hotWords[i]),
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onTap: () {
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_inputController.text = state.hotWords[i];
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_submit(state.hotWords[i]);
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},
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),
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],
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);
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}
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/// 结果页：排序切换 + 双列网格
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Widget _buildResults(SearchState state, SearchNotifier notifier) {
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return Column(
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children: [
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// 排序切换
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Padding(
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padding: const EdgeInsets.symmetric(horizontal: 16),
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child: Row(
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children: [
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for (final s in SearchSort.values) ...[
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GestureDetector(
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onTap: () => notifier.search(state.keyword, sort: s),
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child: Text(
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s.label,
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style: TextStyle(
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fontSize: 14,
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fontWeight: s == state.sort
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? FontWeight.w700
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: FontWeight.w400,
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color: s == state.sort
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? Colors.white
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: AppColors.textSecondary,
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),
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),
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),
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const SizedBox(width: 20),
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],
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const Spacer(),
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if (state.total > 0)
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Text(
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'共 ${state.total} 条',
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style: const TextStyle(
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color: AppColors.textWeak,
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fontSize: 12,
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),
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),
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],
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),
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),
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const SizedBox(height: 8),
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Expanded(
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child: state.isSearching
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? const Center(
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child: CircularProgressIndicator(color: AppColors.primary),
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)
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: state.items.isEmpty
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? const Center(
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child: Text(
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'未找到相关视频',
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style: TextStyle(color: AppColors.textSecondary),
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),
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)
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: GridView.builder(
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controller: _scrollController,
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padding: const EdgeInsets.symmetric(horizontal: 8),
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gridDelegate:
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const SliverGridDelegateWithFixedCrossAxisCount(
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crossAxisCount: 2,
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crossAxisSpacing: 8,
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mainAxisSpacing: 8,
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childAspectRatio: 0.68,
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),
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itemCount:
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state.items.length + (state.isLoadingMore ? 2 : 0),
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itemBuilder: (context, index) {
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if (index >= state.items.length) {
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return const Center(
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child: SizedBox(
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width: 20,
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height: 20,
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child: CircularProgressIndicator(
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strokeWidth: 2,
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color: AppColors.primary,
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),
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),
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);
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}
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return VideoGridCard(item: state.items[index]);
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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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/// 视频网格卡片：封面 + 标题 + 作者 + 播放量（搜索结果 / 标签视频页共用）
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class VideoGridCard extends StatelessWidget {
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const VideoGridCard({super.key, required this.item});
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final VideoItem item;
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@override
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Widget build(BuildContext context) {
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return GestureDetector(
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onTap: () => context.push('/search/play', extra: item),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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// 封面
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Expanded(
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child: ClipRRect(
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borderRadius: BorderRadius.circular(8),
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child: Container(
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width: double.infinity,
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color: AppColors.surface,
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child: item.coverUrl.isNotEmpty
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? CachedNetworkImage(
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imageUrl: item.coverUrl,
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fit: BoxFit.cover,
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errorWidget: (_, __, ___) => const Icon(
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Icons.play_circle_outline,
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color: AppColors.textWeak,
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size: 40,
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),
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)
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: const Icon(
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Icons.play_circle_outline,
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color: AppColors.textWeak,
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size: 40,
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),
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),
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),
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),
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const SizedBox(height: 4),
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Text(
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item.title.isNotEmpty ? item.title : '未命名视频',
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maxLines: 1,
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overflow: TextOverflow.ellipsis,
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style: const TextStyle(fontSize: 13),
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),
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Text(
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'${item.author.nickname} · ${_formatCount(item.viewCount)}次播放',
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maxLines: 1,
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overflow: TextOverflow.ellipsis,
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style: const TextStyle(
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color: AppColors.textWeak,
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fontSize: 11,
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),
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),
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],
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),
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);
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}
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static String _formatCount(int n) {
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if (n >= 10000) return '${(n / 10000).toStringAsFixed(1)}w';
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return n.toString();
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}
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}
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