d0d7d8428d
- 新增 doctor_web/ React前端 (dashboard/患者/问诊/报告/随访) - 后端新增 doctor_endpoints (14个医生API) + ConsultationHub (SignalR) - Flutter端 SignalR 替换轮询实现实时聊天
304 lines
9.9 KiB
Dart
304 lines
9.9 KiB
Dart
import 'dart:async';
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import 'package:flutter_riverpod/flutter_riverpod.dart';
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import 'package:signalr_netcore/signalr_client.dart';
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import '../core/api_client.dart' show baseUrl;
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import 'auth_provider.dart';
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class ConsultationMsg {
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final String id;
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final String senderType; // 'User' | 'Ai' | 'Doctor'
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final String? senderName;
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final String content;
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final DateTime createdAt;
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ConsultationMsg({
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required this.id,
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required this.senderType,
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this.senderName,
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required this.content,
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required this.createdAt,
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});
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}
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class ConsultationChatState {
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final String? consultationId;
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final String doctorId;
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final String doctorName;
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final String doctorTitle;
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final String doctorDepartment;
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final String status; // AiTalking | WaitingDoctor | DoctorReplied | Closed
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final List<ConsultationMsg> messages;
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final bool isLoading;
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final bool isSending;
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final bool isConnected;
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final int quotaRemaining;
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final int quotaTotal;
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const ConsultationChatState({
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this.consultationId,
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this.doctorId = '',
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this.doctorName = '',
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this.doctorTitle = '',
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this.doctorDepartment = '',
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this.status = 'AiTalking',
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this.messages = const [],
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this.isLoading = true,
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this.isSending = false,
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this.isConnected = false,
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this.quotaRemaining = 3,
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this.quotaTotal = 3,
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});
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ConsultationChatState copyWith({
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String? consultationId,
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String? doctorId,
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String? doctorName,
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String? doctorTitle,
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String? doctorDepartment,
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String? status,
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List<ConsultationMsg>? messages,
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bool? isLoading,
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bool? isSending,
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bool? isConnected,
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int? quotaRemaining,
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int? quotaTotal,
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}) =>
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ConsultationChatState(
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consultationId: consultationId ?? this.consultationId,
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doctorId: doctorId ?? this.doctorId,
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doctorName: doctorName ?? this.doctorName,
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doctorTitle: doctorTitle ?? this.doctorTitle,
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doctorDepartment: doctorDepartment ?? this.doctorDepartment,
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status: status ?? this.status,
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messages: messages ?? this.messages,
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isLoading: isLoading ?? this.isLoading,
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isSending: isSending ?? this.isSending,
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isConnected: isConnected ?? this.isConnected,
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quotaRemaining: quotaRemaining ?? this.quotaRemaining,
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quotaTotal: quotaTotal ?? this.quotaTotal,
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);
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}
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final consultationChatProvider =
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NotifierProvider<ConsultationChatNotifier, ConsultationChatState>(
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ConsultationChatNotifier.new);
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class ConsultationChatNotifier extends Notifier<ConsultationChatState> {
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HubConnection? _hub;
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String get _hubUrl => '$baseUrl/hubs/consultation';
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@override
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ConsultationChatState build() => const ConsultationChatState();
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Future<void> init(String doctorId) async {
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state = state.copyWith(doctorId: doctorId, isLoading: true);
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final api = ref.read(apiClientProvider);
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try {
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// 加载医生信息
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await _loadDoctorInfo(doctorId);
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// 加载配额
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final quotaRes = await api.get('/api/user/consultation-quota');
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final quota = quotaRes.data['data'];
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state = state.copyWith(
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quotaRemaining: quota?['remaining'] ?? 3,
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quotaTotal: quota?['total'] ?? 3,
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);
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// 创建问诊会话
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final createRes = await api.post('/api/consultations', data: {'doctorId': doctorId});
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final consultationId = createRes.data['data']?['id']?.toString() ?? '';
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// 加载历史消息
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await _loadMessages(consultationId);
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// 新会话：插入AI开场问候
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if (state.messages.isEmpty) {
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final greeting = ConsultationMsg(
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id: 'greeting_${DateTime.now().millisecondsSinceEpoch}',
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senderType: 'Ai',
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senderName: 'AI分身 · ${state.doctorName}',
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content:
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'您好，我是${state.doctorName}的AI分身。请问您最近有什么身体不适？可以描述一下您的症状，我会先帮您做初步分析。\n\n如果情况需要，我会帮您转接${state.doctorName}医生。',
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createdAt: DateTime.now(),
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);
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state = state.copyWith(
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consultationId: consultationId,
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messages: [greeting],
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isLoading: false,
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);
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} else {
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state = state.copyWith(consultationId: consultationId, isLoading: false);
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}
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// 建立 SignalR 连接
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await _connectHub(consultationId);
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} catch (_) {
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state = state.copyWith(isLoading: false);
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}
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}
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Future<void> _connectHub(String consultationId) async {
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try {
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_hub?.stop();
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_hub = HubConnectionBuilder()
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.withUrl(_hubUrl)
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.withAutomaticReconnect()
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.build();
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// 注册消息接收
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_hub!.on('ReceiveMessage', (args) {
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if (args == null || args.isEmpty) return;
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final data = args[0] as Map<String, dynamic>;
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final msgConsultationId = data['consultationId']?.toString() ?? '';
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if (msgConsultationId != consultationId) return;
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final msg = ConsultationMsg(
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id: data['id']?.toString() ?? DateTime.now().millisecondsSinceEpoch.toString(),
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senderType: data['senderType']?.toString() ?? 'Ai',
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senderName: data['senderName']?.toString(),
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content: data['content']?.toString() ?? '',
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createdAt: data['createdAt'] != null
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? DateTime.tryParse(data['createdAt'].toString()) ?? DateTime.now()
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: DateTime.now(),
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);
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// 去重
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final existingIds = state.messages.map((m) => m.id).toSet();
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if (!existingIds.contains(msg.id)) {
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state = state.copyWith(messages: [...state.messages, msg]);
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}
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});
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await _hub!.start();
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await _hub!.invoke('JoinConsultation', args: [consultationId]);
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state = state.copyWith(isConnected: true);
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} catch (_) {
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// SignalR 连接失败，回退到轮询
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_startPolling();
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}
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}
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Future<void> _loadDoctorInfo(String doctorId) async {
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try {
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final api = ref.read(apiClientProvider);
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final res = await api.get('/api/doctors');
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final list = (res.data['data'] as List?) ?? [];
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final doc = list.cast<Map<String, dynamic>>().firstWhere(
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(d) => d['id']?.toString() == doctorId,
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orElse: () => <String, dynamic>{});
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state = state.copyWith(
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doctorName: doc['name']?.toString() ?? '',
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doctorTitle: doc['title']?.toString() ?? '',
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doctorDepartment: doc['department']?.toString() ?? '',
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);
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} catch (_) {}
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}
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Future<void> _loadMessages(String consultationId) async {
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try {
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final api = ref.read(apiClientProvider);
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final res = await api.get('/api/consultations/$consultationId/messages');
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final list = (res.data['data'] as List?) ?? [];
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final msgs = list.map((m) {
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final map = m as Map<String, dynamic>;
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return ConsultationMsg(
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id: map['id']?.toString() ?? '',
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senderType: map['senderType']?.toString() ?? 'User',
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senderName: map['senderName']?.toString(),
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content: map['content']?.toString() ?? '',
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createdAt: DateTime.tryParse(map['createdAt']?.toString() ?? '') ?? DateTime.now(),
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);
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}).toList();
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if (msgs.isNotEmpty) {
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state = state.copyWith(messages: msgs);
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}
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} catch (_) {}
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}
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Future<void> sendMessage(String text) async {
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if (text.trim().isEmpty || state.isSending || state.consultationId == null) return;
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final userMsg = ConsultationMsg(
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id: '${DateTime.now().millisecondsSinceEpoch}',
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senderType: 'User',
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content: text,
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createdAt: DateTime.now(),
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);
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state = state.copyWith(
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messages: [...state.messages, userMsg],
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isSending: true,
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);
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try {
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// 优先通过 SignalR 发送
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if (_hub != null && _hub!.state == HubConnectionState.Connected) {
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await _hub!.invoke('SendMessage',
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args: <Object>[state.consultationId!, 'User', '', text]);
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} else {
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// 回退到 HTTP
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final api = ref.read(apiClientProvider);
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await api.post('/api/consultations/${state.consultationId}/messages',
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data: {'content': text});
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}
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} catch (_) {
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// 静默失败，消息已显示在本地
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}
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state = state.copyWith(isSending: false);
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}
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// ---- 轮询回退（SignalR 不可用时）----
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Timer? _pollTimer;
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void _startPolling() {
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_pollTimer?.cancel();
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_pollTimer = Timer.periodic(const Duration(seconds: 5), (_) => _pollMessages());
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}
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Future<void> _pollMessages() async {
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if (state.consultationId == null || state.isConnected) return;
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try {
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final api = ref.read(apiClientProvider);
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final lastId = state.messages.isNotEmpty ? state.messages.last.id : null;
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final params = <String, dynamic>{};
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if (lastId != null && !lastId.startsWith('greeting_')) {
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params['after'] = lastId;
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}
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final res = await api.get(
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'/api/consultations/${state.consultationId}/messages',
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queryParameters: params.isNotEmpty ? params : null,
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);
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final list = (res.data['data'] as List?) ?? [];
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if (list.isEmpty) return;
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final existingIds = state.messages.map((m) => m.id).toSet();
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final newMsgs = list
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.map((m) {
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final map = m as Map<String, dynamic>;
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return ConsultationMsg(
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id: map['id']?.toString() ?? '',
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senderType: map['senderType']?.toString() ?? 'User',
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senderName: map['senderName']?.toString(),
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content: map['content']?.toString() ?? '',
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createdAt:
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DateTime.tryParse(map['createdAt']?.toString() ?? '') ?? DateTime.now(),
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);
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})
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.where((m) => !existingIds.contains(m.id))
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.toList();
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if (newMsgs.isNotEmpty) {
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state = state.copyWith(messages: [...state.messages, ...newMsgs]);
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}
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} catch (_) {}
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}
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void stop() {
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_hub?.stop();
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_hub = null;
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_pollTimer?.cancel();
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_pollTimer = null;
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}
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}
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