604 lines
22 KiB
Dart
604 lines
22 KiB
Dart
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import 'package:flutter/material.dart';
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import '../models/ai_tutor.dart';
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import '../models/conversation.dart';
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/// AI对话页面
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class AIConversationScreen extends StatefulWidget {
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final AITutor tutor;
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const AIConversationScreen({
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super.key,
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required this.tutor,
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});
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@override
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State<AIConversationScreen> createState() => _AIConversationScreenState();
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}
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class _AIConversationScreenState extends State<AIConversationScreen> {
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final TextEditingController _messageController = TextEditingController();
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final ScrollController _scrollController = ScrollController();
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final List<ConversationMessage> _messages = [];
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bool _isTyping = false;
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bool _isRecording = false;
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@override
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void initState() {
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super.initState();
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_initializeConversation();
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}
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void _initializeConversation() {
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// 添加导师的欢迎消息
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final welcomeMessage = ConversationMessage(
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id: 'welcome_${DateTime.now().millisecondsSinceEpoch}',
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content: _getWelcomeMessage(),
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type: MessageType.ai,
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timestamp: DateTime.now(),
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);
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setState(() {
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_messages.add(welcomeMessage);
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});
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}
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String _getWelcomeMessage() {
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switch (widget.tutor.type) {
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case TutorType.business:
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return '${widget.tutor.introduction}\n\n让我们开始商务英语对话练习吧！你可以告诉我你的工作背景，或者我们可以模拟一个商务场景。';
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case TutorType.daily:
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return '${widget.tutor.introduction}\n\n今天想聊什么呢？我们可以谈论天气、兴趣爱好，或者你今天做了什么有趣的事情！';
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case TutorType.travel:
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return '${widget.tutor.introduction}\n\n准备好开始我们的旅行英语之旅了吗？告诉我你想去哪里旅行，或者我们可以模拟在机场、酒店的场景！';
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case TutorType.academic:
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return '${widget.tutor.introduction}\n\n欢迎来到学术英语课堂！我们可以讨论你的研究领域，或者练习学术演讲技巧。';
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}
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}
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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backgroundColor: const Color(0xFFF5F5F5),
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appBar: AppBar(
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backgroundColor: widget.tutor.type.color,
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elevation: 0,
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leading: IconButton(
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icon: const Icon(Icons.arrow_back, color: Colors.white),
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onPressed: () => Navigator.of(context).pop(),
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),
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title: Row(
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children: [
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Text(
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widget.tutor.avatar,
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style: const TextStyle(fontSize: 24),
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),
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const SizedBox(width: 8),
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Expanded(
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text(
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widget.tutor.name,
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style: const TextStyle(
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color: Colors.white,
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fontSize: 16,
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fontWeight: FontWeight.bold,
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),
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),
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Text(
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widget.tutor.type.displayName,
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style: const TextStyle(
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color: Colors.white70,
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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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],
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),
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actions: [
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IconButton(
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icon: const Icon(Icons.info_outline, color: Colors.white),
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onPressed: _showTutorInfo,
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),
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],
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),
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body: Column(
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children: [
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Expanded(
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child: ListView.builder(
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controller: _scrollController,
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padding: const EdgeInsets.all(16),
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itemCount: _messages.length + (_isTyping ? 1 : 0),
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itemBuilder: (context, index) {
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if (index == _messages.length && _isTyping) {
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return _buildTypingIndicator();
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}
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return _buildMessageBubble(_messages[index]);
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},
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),
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),
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_buildInputArea(),
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],
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),
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);
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}
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Widget _buildMessageBubble(ConversationMessage message) {
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final isUser = message.type == MessageType.user;
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return Padding(
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padding: const EdgeInsets.symmetric(vertical: 4),
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child: Row(
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mainAxisAlignment: isUser ? MainAxisAlignment.end : MainAxisAlignment.start,
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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if (!isUser) ...[
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CircleAvatar(
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radius: 16,
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backgroundColor: widget.tutor.type.color.withOpacity(0.1),
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child: Text(
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widget.tutor.avatar,
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style: const TextStyle(fontSize: 16),
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),
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),
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const SizedBox(width: 8),
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],
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Flexible(
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child: Container(
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padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
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decoration: BoxDecoration(
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color: isUser ? widget.tutor.type.color : Colors.white,
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borderRadius: BorderRadius.circular(20),
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boxShadow: [
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BoxShadow(
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color: Colors.black.withOpacity(0.05),
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blurRadius: 5,
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offset: const Offset(0, 2),
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),
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],
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),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text(
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message.content,
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style: TextStyle(
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color: isUser ? Colors.white : Colors.black87,
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fontSize: 14,
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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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_formatTime(message.timestamp),
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style: TextStyle(
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color: isUser ? Colors.white70 : Colors.grey,
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fontSize: 10,
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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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if (isUser) ...[
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const SizedBox(width: 8),
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CircleAvatar(
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radius: 16,
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backgroundColor: Colors.blue.withOpacity(0.1),
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child: const Icon(
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Icons.person,
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size: 16,
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color: Colors.blue,
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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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Widget _buildTypingIndicator() {
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return Padding(
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padding: const EdgeInsets.symmetric(vertical: 4),
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child: Row(
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children: [
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CircleAvatar(
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radius: 16,
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backgroundColor: widget.tutor.type.color.withOpacity(0.1),
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child: Text(
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widget.tutor.avatar,
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style: const TextStyle(fontSize: 16),
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),
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),
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const SizedBox(width: 8),
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Container(
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padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
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decoration: BoxDecoration(
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color: Colors.white,
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borderRadius: BorderRadius.circular(20),
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boxShadow: [
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BoxShadow(
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color: Colors.black.withOpacity(0.05),
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blurRadius: 5,
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offset: const Offset(0, 2),
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),
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],
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),
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child: Row(
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mainAxisSize: MainAxisSize.min,
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children: [
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_buildDot(0),
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const SizedBox(width: 4),
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_buildDot(1),
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const SizedBox(width: 4),
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_buildDot(2),
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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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Widget _buildDot(int index) {
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return AnimatedContainer(
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duration: Duration(milliseconds: 600 + (index * 200)),
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width: 6,
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height: 6,
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decoration: BoxDecoration(
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color: widget.tutor.type.color.withOpacity(0.6),
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shape: BoxShape.circle,
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),
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);
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}
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Widget _buildInputArea() {
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return Container(
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padding: const EdgeInsets.all(16),
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decoration: const BoxDecoration(
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color: Colors.white,
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boxShadow: [
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BoxShadow(
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color: Colors.black12,
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blurRadius: 5,
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offset: Offset(0, -2),
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),
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],
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),
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child: Row(
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children: [
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GestureDetector(
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onTapDown: (_) => _startRecording(),
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onTapUp: (_) => _stopRecording(),
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onTapCancel: () => _stopRecording(),
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child: Container(
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padding: const EdgeInsets.all(12),
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decoration: BoxDecoration(
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color: _isRecording ? Colors.red : widget.tutor.type.color,
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shape: BoxShape.circle,
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),
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child: Icon(
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_isRecording ? Icons.stop : Icons.mic,
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color: Colors.white,
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size: 20,
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),
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),
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),
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const SizedBox(width: 12),
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Expanded(
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child: TextField(
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controller: _messageController,
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decoration: InputDecoration(
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hintText: '输入消息...',
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border: OutlineInputBorder(
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borderRadius: BorderRadius.circular(25),
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borderSide: BorderSide.none,
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),
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filled: true,
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fillColor: Colors.grey[100],
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contentPadding: const EdgeInsets.symmetric(
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horizontal: 16,
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vertical: 12,
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),
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),
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onSubmitted: (_) => _sendMessage(),
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),
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),
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const SizedBox(width: 12),
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GestureDetector(
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onTap: _sendMessage,
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child: Container(
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padding: const EdgeInsets.all(12),
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decoration: BoxDecoration(
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color: widget.tutor.type.color,
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shape: BoxShape.circle,
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),
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child: const Icon(
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Icons.send,
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color: Colors.white,
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size: 20,
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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 _sendMessage() {
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final text = _messageController.text.trim();
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if (text.isEmpty) return;
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// 添加用户消息
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final userMessage = ConversationMessage(
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id: 'user_${DateTime.now().millisecondsSinceEpoch}',
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content: text,
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type: MessageType.user,
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timestamp: DateTime.now(),
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);
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setState(() {
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_messages.add(userMessage);
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_isTyping = true;
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});
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_messageController.clear();
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_scrollToBottom();
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// 生成AI回复
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_generateAIResponse(text);
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}
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void _generateAIResponse(String userMessage) {
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// 模拟AI思考时间
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Future.delayed(const Duration(milliseconds: 1500), () {
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final aiResponse = _getAIResponse(userMessage);
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final aiMessage = ConversationMessage(
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id: 'ai_${DateTime.now().millisecondsSinceEpoch}',
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content: aiResponse,
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type: MessageType.ai,
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timestamp: DateTime.now(),
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);
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setState(() {
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_isTyping = false;
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_messages.add(aiMessage);
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});
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_scrollToBottom();
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});
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}
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String _getAIResponse(String userMessage) {
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final message = userMessage.toLowerCase();
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// 根据导师类型和用户消息生成相应回复
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switch (widget.tutor.type) {
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case TutorType.business:
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return _getBusinessResponse(message);
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case TutorType.daily:
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return _getDailyResponse(message);
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case TutorType.travel:
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return _getTravelResponse(message);
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case TutorType.academic:
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return _getAcademicResponse(message);
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}
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}
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String _getBusinessResponse(String message) {
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if (message.contains('meeting') || message.contains('会议')) {
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return "Great! Let's discuss meeting preparation. What type of meeting are you attending? Is it a client presentation, team meeting, or board meeting?";
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} else if (message.contains('presentation') || message.contains('演讲')) {
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return "Presentations are crucial in business. What's your presentation topic? I can help you structure your content and practice key phrases.";
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} else if (message.contains('email') || message.contains('邮件')) {
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return "Business emails require professional tone. Are you writing to a client, colleague, or supervisor? What's the main purpose of your email?";
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} else if (message.contains('hello') || message.contains('hi') || message.contains('你好')) {
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return "Hello! I'm your business English tutor. I can help you with presentations, meetings, negotiations, and professional communication. What would you like to practice today?";
|
||
|
|
} else {
|
||
|
|
return "That's an interesting point. In business context, we should consider the professional implications. Could you elaborate on your specific business scenario?";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
String _getDailyResponse(String message) {
|
||
|
|
if (message.contains('weather') || message.contains('天气')) {
|
||
|
|
return "The weather is a great conversation starter! How's the weather where you are? You can say 'It's sunny/rainy/cloudy today' or 'What a beautiful day!'";
|
||
|
|
} else if (message.contains('food') || message.contains('吃') || message.contains('饭')) {
|
||
|
|
return "Food is always a fun topic! What's your favorite cuisine? You can practice ordering food or describing flavors. Try saying 'I'd like to order...' or 'This tastes delicious!'";
|
||
|
|
} else if (message.contains('hobby') || message.contains('爱好')) {
|
||
|
|
return "Hobbies are personal and interesting! What do you enjoy doing in your free time? You can say 'I enjoy...' or 'My hobby is...' or 'In my spare time, I like to...'";
|
||
|
|
} else if (message.contains('hello') || message.contains('hi') || message.contains('你好')) {
|
||
|
|
return "Hi there! I'm here to help you with everyday English conversations. We can talk about weather, food, hobbies, shopping, or any daily activities. What interests you?";
|
||
|
|
} else {
|
||
|
|
return "That's interesting! In daily conversations, we often share personal experiences. Can you tell me more about that? It's great practice for natural English!";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
String _getTravelResponse(String message) {
|
||
|
|
if (message.contains('airport') || message.contains('flight') || message.contains('机场')) {
|
||
|
|
return "Airport conversations are essential for travelers! Are you checking in, going through security, or asking for directions? Try phrases like 'Where is gate B12?' or 'Is this flight delayed?'";
|
||
|
|
} else if (message.contains('hotel') || message.contains('酒店')) {
|
||
|
|
return "Hotel interactions are important! Are you checking in, asking about amenities, or reporting an issue? Practice saying 'I have a reservation under...' or 'Could you help me with...'";
|
||
|
|
} else if (message.contains('restaurant') || message.contains('餐厅')) {
|
||
|
|
return "Dining out while traveling is fun! Are you making a reservation, ordering food, or asking about local specialties? Try 'Table for two, please' or 'What do you recommend?'";
|
||
|
|
} else if (message.contains('direction') || message.contains('路')) {
|
||
|
|
return "Getting directions is crucial when traveling! Practice asking 'How do I get to...?' or 'Is it walking distance?' You can also say 'Could you show me on the map?'";
|
||
|
|
} else if (message.contains('hello') || message.contains('hi') || message.contains('你好')) {
|
||
|
|
return "Welcome, fellow traveler! I'm your travel English companion. I can help you with airport conversations, hotel bookings, restaurant orders, and asking for directions. Where shall we start?";
|
||
|
|
} else {
|
||
|
|
return "That sounds like a great travel experience! When traveling, it's important to communicate clearly. Can you describe the situation in more detail? I'll help you with the right phrases!";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
String _getAcademicResponse(String message) {
|
||
|
|
if (message.contains('research') || message.contains('研究')) {
|
||
|
|
return "Research is fundamental in academics! What's your research area? We can practice presenting findings, discussing methodology, or explaining complex concepts clearly.";
|
||
|
|
} else if (message.contains('presentation') || message.contains('论文')) {
|
||
|
|
return "Academic presentations require clear structure and precise language. Are you presenting research results, defending a thesis, or giving a conference talk? Let's work on your key points!";
|
||
|
|
} else if (message.contains('discussion') || message.contains('讨论')) {
|
||
|
|
return "Academic discussions involve critical thinking and evidence-based arguments. What topic are you discussing? Practice phrases like 'According to the research...' or 'The evidence suggests...'";
|
||
|
|
} else if (message.contains('writing') || message.contains('写作')) {
|
||
|
|
return "Academic writing has specific conventions. Are you working on an essay, research paper, or thesis? I can help with structure, citations, and formal language.";
|
||
|
|
} else if (message.contains('hello') || message.contains('hi') || message.contains('你好')) {
|
||
|
|
return "Greetings! I'm your academic English tutor. I specialize in research discussions, academic presentations, scholarly writing, and conference communications. What academic skill would you like to develop?";
|
||
|
|
} else {
|
||
|
|
return "That's a thoughtful academic point. In scholarly discourse, we need to support our arguments with evidence. Could you provide more context or examples to strengthen your position?";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void _startRecording() {
|
||
|
|
setState(() {
|
||
|
|
_isRecording = true;
|
||
|
|
});
|
||
|
|
// TODO: 实现语音录制功能
|
||
|
|
}
|
||
|
|
|
||
|
|
void _stopRecording() {
|
||
|
|
setState(() {
|
||
|
|
_isRecording = false;
|
||
|
|
});
|
||
|
|
// TODO: 处理录制的语音
|
||
|
|
}
|
||
|
|
|
||
|
|
void _scrollToBottom() {
|
||
|
|
WidgetsBinding.instance.addPostFrameCallback((_) {
|
||
|
|
if (_scrollController.hasClients) {
|
||
|
|
_scrollController.animateTo(
|
||
|
|
_scrollController.position.maxScrollExtent,
|
||
|
|
duration: const Duration(milliseconds: 300),
|
||
|
|
curve: Curves.easeOut,
|
||
|
|
);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
void _showTutorInfo() {
|
||
|
|
showModalBottomSheet(
|
||
|
|
context: context,
|
||
|
|
isScrollControlled: true,
|
||
|
|
backgroundColor: Colors.transparent,
|
||
|
|
builder: (context) => Container(
|
||
|
|
height: MediaQuery.of(context).size.height * 0.7,
|
||
|
|
decoration: const BoxDecoration(
|
||
|
|
color: Colors.white,
|
||
|
|
borderRadius: BorderRadius.vertical(top: Radius.circular(20)),
|
||
|
|
),
|
||
|
|
child: Column(
|
||
|
|
children: [
|
||
|
|
Container(
|
||
|
|
width: 40,
|
||
|
|
height: 4,
|
||
|
|
margin: const EdgeInsets.symmetric(vertical: 12),
|
||
|
|
decoration: BoxDecoration(
|
||
|
|
color: Colors.grey[300],
|
||
|
|
borderRadius: BorderRadius.circular(2),
|
||
|
|
),
|
||
|
|
),
|
||
|
|
Expanded(
|
||
|
|
child: Padding(
|
||
|
|
padding: const EdgeInsets.all(20),
|
||
|
|
child: Column(
|
||
|
|
crossAxisAlignment: CrossAxisAlignment.start,
|
||
|
|
children: [
|
||
|
|
Row(
|
||
|
|
children: [
|
||
|
|
Text(
|
||
|
|
widget.tutor.avatar,
|
||
|
|
style: const TextStyle(fontSize: 40),
|
||
|
|
),
|
||
|
|
const SizedBox(width: 16),
|
||
|
|
Expanded(
|
||
|
|
child: Column(
|
||
|
|
crossAxisAlignment: CrossAxisAlignment.start,
|
||
|
|
children: [
|
||
|
|
Text(
|
||
|
|
widget.tutor.name,
|
||
|
|
style: const TextStyle(
|
||
|
|
fontSize: 20,
|
||
|
|
fontWeight: FontWeight.bold,
|
||
|
|
),
|
||
|
|
),
|
||
|
|
Text(
|
||
|
|
widget.tutor.type.displayName,
|
||
|
|
style: TextStyle(
|
||
|
|
fontSize: 14,
|
||
|
|
color: widget.tutor.type.color,
|
||
|
|
),
|
||
|
|
),
|
||
|
|
],
|
||
|
|
),
|
||
|
|
),
|
||
|
|
],
|
||
|
|
),
|
||
|
|
const SizedBox(height: 20),
|
||
|
|
Text(
|
||
|
|
'个性特点',
|
||
|
|
style: TextStyle(
|
||
|
|
fontSize: 16,
|
||
|
|
fontWeight: FontWeight.bold,
|
||
|
|
color: widget.tutor.type.color,
|
||
|
|
),
|
||
|
|
),
|
||
|
|
const SizedBox(height: 8),
|
||
|
|
Text(
|
||
|
|
widget.tutor.personality,
|
||
|
|
style: const TextStyle(fontSize: 14),
|
||
|
|
),
|
||
|
|
const SizedBox(height: 20),
|
||
|
|
Text(
|
||
|
|
'专业领域',
|
||
|
|
style: TextStyle(
|
||
|
|
fontSize: 16,
|
||
|
|
fontWeight: FontWeight.bold,
|
||
|
|
color: widget.tutor.type.color,
|
||
|
|
),
|
||
|
|
),
|
||
|
|
const SizedBox(height: 8),
|
||
|
|
Wrap(
|
||
|
|
spacing: 8,
|
||
|
|
runSpacing: 8,
|
||
|
|
children: widget.tutor.specialties.map((specialty) {
|
||
|
|
return Container(
|
||
|
|
padding: const EdgeInsets.symmetric(
|
||
|
|
horizontal: 12,
|
||
|
|
vertical: 6,
|
||
|
|
),
|
||
|
|
decoration: BoxDecoration(
|
||
|
|
color: widget.tutor.type.color.withOpacity(0.1),
|
||
|
|
borderRadius: BorderRadius.circular(16),
|
||
|
|
border: Border.all(
|
||
|
|
color: widget.tutor.type.color.withOpacity(0.3),
|
||
|
|
),
|
||
|
|
),
|
||
|
|
child: Text(
|
||
|
|
specialty,
|
||
|
|
style: TextStyle(
|
||
|
|
fontSize: 12,
|
||
|
|
color: widget.tutor.type.color,
|
||
|
|
),
|
||
|
|
),
|
||
|
|
);
|
||
|
|
}).toList(),
|
||
|
|
),
|
||
|
|
],
|
||
|
|
),
|
||
|
|
),
|
||
|
|
),
|
||
|
|
],
|
||
|
|
),
|
||
|
|
),
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
String _formatTime(DateTime time) {
|
||
|
|
return '${time.hour.toString().padLeft(2, '0')}:${time.minute.toString().padLeft(2, '0')}';
|
||
|
|
}
|
||
|
|
|
||
|
|
@override
|
||
|
|
void dispose() {
|
||
|
|
_messageController.dispose();
|
||
|
|
_scrollController.dispose();
|
||
|
|
super.dispose();
|
||
|
|
}
|
||
|
|
}
|