generated from dellevin/template
411 lines
13 KiB
Dart
411 lines
13 KiB
Dart
import 'dart:convert';
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import 'package:flutter/material.dart';
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import 'package:webview_flutter/webview_flutter.dart';
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/// 豆瓣影视WebView页面 - 用于抓取影视信息
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class DoubanWebViewPage extends StatefulWidget {
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final String url;
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const DoubanWebViewPage({super.key, required this.url});
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@override
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State<DoubanWebViewPage> createState() => _DoubanWebViewPageState();
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}
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class _DoubanWebViewPageState extends State<DoubanWebViewPage> {
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late WebViewController _controller;
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bool _isLoading = true;
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bool _isExtracting = false; // 防止重复提取
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@override
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void initState() {
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super.initState();
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_initWebView();
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}
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@override
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void dispose() {
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// 清理 WebView 资源
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_controller.loadRequest(Uri.parse('about:blank'));
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super.dispose();
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}
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void _initWebView() {
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_controller = WebViewController()
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..setJavaScriptMode(JavaScriptMode.unrestricted)
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..setNavigationDelegate(
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NavigationDelegate(
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onPageStarted: (String url) {
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if (mounted) {
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setState(() {
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_isLoading = true;
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});
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}
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},
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onPageFinished: (String url) {
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if (mounted) {
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setState(() {
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_isLoading = false;
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});
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}
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},
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),
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)
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..loadRequest(Uri.parse(widget.url));
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}
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@override
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Widget build(BuildContext context) {
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final colors = Theme.of(context).colorScheme;
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return Scaffold(
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backgroundColor: colors.surface,
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appBar: AppBar(
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title: const Text('豆瓣影视'),
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leading: _buildBackButton(),
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actions: [
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// 提取按钮 - 始终显示
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_buildActionButton(
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colors: colors,
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icon: Icons.auto_fix_high_outlined,
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onPressed: _showExtractedInfo,
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tooltip: '提取信息',
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),
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// 刷新按钮
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_buildActionButton(
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colors: colors,
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icon: Icons.refresh,
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onPressed: () => _controller.reload(),
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tooltip: '刷新',
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),
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const SizedBox(width: 8),
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],
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),
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body: Stack(
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children: [
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WebViewWidget(controller: _controller),
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// 加载指示器
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if (_isLoading) const Center(
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child: CircularProgressIndicator(),
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),
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],
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),
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);
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}
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/// 构建返回按钮
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Widget _buildBackButton() {
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return Container(
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margin: const EdgeInsets.symmetric(horizontal: 4, vertical: 8),
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decoration: BoxDecoration(
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color: Colors.black.withValues(alpha: 0.3),
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borderRadius: BorderRadius.circular(8),
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),
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child: Material(
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color: Colors.transparent,
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child: InkWell(
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onTap: () {
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// 停止加载并返回
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_controller.loadRequest(Uri.parse('about:blank'));
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Navigator.pop(context);
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},
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borderRadius: BorderRadius.circular(8),
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child: Container(
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padding: const EdgeInsets.all(8),
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child: const Icon(Icons.arrow_back, color: Colors.white, size: 22),
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),
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),
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),
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);
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}
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/// 构建右上角操作按钮
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Widget _buildActionButton({
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required ColorScheme colors,
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required IconData icon,
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required VoidCallback onPressed,
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required String tooltip,
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}) {
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return Container(
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margin: const EdgeInsets.symmetric(horizontal: 4, vertical: 8),
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decoration: BoxDecoration(
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color: Colors.white.withValues(alpha: 0.9),
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borderRadius: BorderRadius.circular(8),
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),
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child: Material(
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color: Colors.transparent,
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child: InkWell(
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onTap: onPressed,
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borderRadius: BorderRadius.circular(8),
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child: Container(
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padding: const EdgeInsets.all(8),
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child: Icon(icon, color: colors.onSurface, size: 22),
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),
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),
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),
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);
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}
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/// 显示提取的信息对话框
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Future<void> _showExtractedInfo() async {
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// 先提取信息
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final movieInfo = await _extractMovieInfo();
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if (movieInfo == null) return;
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// 显示提取的信息
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if (mounted) {
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showDialog(
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context: context,
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builder: (ctx) {
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final colors = Theme.of(ctx).colorScheme;
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return AlertDialog(
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backgroundColor: colors.surface,
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shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
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title: Text(
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'提取的影视信息',
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style: TextStyle(
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fontSize: 18,
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fontWeight: FontWeight.w600,
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color: colors.onSurface,
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),
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),
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content: SingleChildScrollView(
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child: Column(
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mainAxisSize: MainAxisSize.min,
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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_buildInfoRow(colors, '标题', movieInfo['title']?.toString() ?? '未提取到'),
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_buildInfoRow(colors, '导演', movieInfo['director']?.toString() ?? '未提取到'),
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_buildInfoRow(colors, '类型', movieInfo['genres']?.toString() ?? '未提取到'),
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_buildInfoRow(colors, '上映日期', movieInfo['releaseDate']?.toString() ?? '未提取到'),
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if (movieInfo['summary'] != null)
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_buildInfoRow(
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colors,
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'简介',
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movieInfo['summary'].toString().substring(
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0,
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movieInfo['summary'].toString().length > 100
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? 100
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: movieInfo['summary'].toString().length) +
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'...'),
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],
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),
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),
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actions: [
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TextButton(
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onPressed: () => Navigator.pop(ctx),
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child: Text(
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'取消',
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style: TextStyle(color: colors.onSurface.withValues(alpha: 0.4)),
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),
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),
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TextButton(
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onPressed: () {
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Navigator.pop(ctx);
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Navigator.pop(context, movieInfo);
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},
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child: Text(
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'使用此信息',
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style: TextStyle(
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color: colors.onSurface, 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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}
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}
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/// 构建信息行
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Widget _buildInfoRow(ColorScheme colors, String label, String value) {
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return Padding(
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padding: const EdgeInsets.only(bottom: 8),
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child: Row(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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SizedBox(
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width: 64,
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child: Text(
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label,
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style: TextStyle(
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fontSize: 14,
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color: colors.onSurface.withValues(alpha: 0.4),
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),
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),
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),
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Expanded(
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child: Text(
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value,
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style: TextStyle(
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fontSize: 14,
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color: colors.onSurface,
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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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/// 提取影视信息
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Future<Map<String, dynamic>?> _extractMovieInfo() async {
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// 检查是否已提取过，避免重复点击
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if (_isExtracting) return null;
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try {
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_isExtracting = true;
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// 显示加载提示
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showDialog(
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context: context,
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barrierDismissible: false,
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builder: (dialogContext) => const Center(
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child: CircularProgressIndicator(),
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),
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);
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// 执行JavaScript代码提取页面信息
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final result = await _controller.runJavaScriptReturningResult(r'''
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(function() {
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const info = {};
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// 获取标题 - 移动版页面
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const titleEl = document.querySelector('.sub-title');
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info.title = titleEl ? titleEl.textContent.trim() : '';
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// 获取年份 - 从 original-title 中提取
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const originalTitleEl = document.querySelector('.sub-original-title');
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if (originalTitleEl) {
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const yearMatch = originalTitleEl.textContent.match(/\((\d{4})\)/);
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info.year = yearMatch ? yearMatch[1] : '';
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} else {
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info.year = '';
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}
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// 获取封面图 - 从 sub-cover 中的 img 标签获取
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const coverEl = document.querySelector('.sub-cover img');
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if (coverEl) {
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let coverUrl = coverEl.src;
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// 将 webp 转换为 jpg 格式，提高兼容性
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if (coverUrl && coverUrl.includes('.webp')) {
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coverUrl = coverUrl.replace('.webp', '.jpg');
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}
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info.coverUrl = coverUrl;
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} else {
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info.coverUrl = '';
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}
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// 获取评分 - 移动版可能在 mark-item 中
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const ratingEl = document.querySelector('.rating-num') || document.querySelector('.score');
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info.rating = ratingEl ? ratingEl.textContent.trim() : '';
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// 获取导演 - 从演职员列表中找
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const directorEl = document.querySelector('.movie-celebrities .item__celebrity .role');
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if (directorEl && directorEl.textContent.includes('导演')) {
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const nameEl = directorEl.closest('.item__celebrity').querySelector('.name');
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info.director = nameEl ? nameEl.textContent.trim() : '';
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} else {
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info.director = '';
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}
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// 获取编剧 - 从演职员列表中找（匹配"编剧"或"剧本"）
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const writerEls = document.querySelectorAll('.movie-celebrities .item__celebrity');
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const writers = [];
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writerEls.forEach(el => {
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const roleEl = el.querySelector('.role');
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if (roleEl && (roleEl.textContent.includes('编剧') || roleEl.textContent.includes('剧本'))) {
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const nameEl = el.querySelector('.name');
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if (nameEl) writers.push(nameEl.textContent.trim());
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}
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});
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info.writers = writers;
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// 获取主演- 从演职员列表中找前5个
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const actorEls = document.querySelectorAll('.movie-celebrities .item__celebrity');
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const actors = [];
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actorEls.forEach(el => {
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const roleEl = el
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.querySelector('.role');
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if (roleEl && (
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roleEl.textContent.includes('配音') ||
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roleEl.textContent.includes('主演') ||
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roleEl.textContent.includes('演员') ||
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roleEl.textContent.includes('参演') ||
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roleEl.textContent.includes('饰')
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)) {
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const nameEl = el.querySelector('.name');
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if (nameEl) actors.push(nameEl.textContent.trim());
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}
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});
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info.actors = actors;
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// 获取类型 - 从 sub-meta 或标签中提取
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const metaEl = document.querySelector('.sub-meta');
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if (metaEl) {
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const metaText = metaEl.textContent;
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const parts = metaText.split('/').map(s => s.trim());
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// 过滤出类型（通常是中文，不是日期，不是时长）
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info.genres = parts.filter(p =>
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p && !p.match(/^\d{4}/) && !p.includes('分钟') && !p.includes('上映')
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).join(',');
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} else {
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info.genres = '';
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}
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// 获取上映日期
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if (metaEl) {
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const dateMatch = metaEl.textContent.match(/(\d{4}-\d{2}-\d{2})/);
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info.releaseDate = dateMatch ? dateMatch[1] : '';
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} else {
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info.releaseDate = '';
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}
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// 获取简介
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const summaryEl = document.querySelector('.subject-intro p');
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if (summaryEl) {
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info.summary = summaryEl.textContent.trim().substring(0, 500);
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} else {
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info.summary = '';
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}
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// 获取别名 - 从 original-title 中提取（去掉年份）
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if (originalTitleEl) {
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const fullText = originalTitleEl.textContent.trim();
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info.alternateTitles = [fullText.replace(/\s*\(\d{4}\)\s*$/, '')];
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} else {
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info.alternateTitles = [];
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}
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return JSON.stringify(info);
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})()
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''');
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// 关闭加载提示
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if (mounted) Navigator.pop(context);
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// 解析提取的信息
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// result 是 JavaScript 执行结果，已经是 JSON 字符串（带引号的）
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final String jsonStr = result.toString();
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// 去除 Dart 字符串转义后外层可能多余的引号
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final String cleanJson = jsonStr.startsWith('"') && jsonStr.endsWith('"')
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? jsonDecode(jsonStr) as String
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: jsonStr;
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final Map<String, dynamic> movieInfo = jsonDecode(cleanJson) as Map<String, dynamic>;
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return movieInfo;
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} catch (e) {
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// 关闭加载提示
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if (mounted) Navigator.pop(context);
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if (mounted) {
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(content: Text('提取信息失败: $e')),
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);
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}
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return null;
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} finally {
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_isExtracting = false;
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}
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}
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}
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