13714d9ed8
- 新增用户通知 outbox 流水线(EfUserNotificationPipeline)与后台投递 worker - 通知中心页面及前端通知服务接入 - 健康指标异常、用药/运动提醒等事件统一产出站内通知 - 健康档案结构化手术史、用药提醒扫描、医生/用户端点等配套调整 - AppDbContext 注册通知相关实体
483 lines
14 KiB
Dart
483 lines
14 KiB
Dart
import 'dart:async';
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import 'dart:io';
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import 'package:flutter_riverpod/flutter_riverpod.dart';
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import 'auth_provider.dart';
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import 'data_providers.dart';
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import '../utils/sse_handler.dart';
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enum MessageType { text, dataConfirm, agentWelcome, taskCard }
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class ChatMessage {
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final String id;
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final String role;
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String content;
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final DateTime createdAt;
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MessageType type;
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Map<String, dynamic>? metadata;
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bool confirmed;
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ChatMessage({
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required this.id,
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required this.role,
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required this.content,
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required this.createdAt,
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this.type = MessageType.text,
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this.metadata,
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this.confirmed = false,
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});
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bool get isUser => role == 'user';
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}
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enum ActiveAgent {
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default_,
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consultation,
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health,
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diet,
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medication,
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report,
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exercise,
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}
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class ChatState {
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final ActiveAgent activeAgent;
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final List<ChatMessage> messages;
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final String? conversationId;
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final bool isStreaming;
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final String? thinkingText;
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const ChatState({
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this.activeAgent = ActiveAgent.default_,
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this.messages = const [],
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this.conversationId,
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this.isStreaming = false,
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this.thinkingText,
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});
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ChatState copyWith({
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ActiveAgent? activeAgent,
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List<ChatMessage>? messages,
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String? conversationId,
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bool? isStreaming,
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String? thinkingText,
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}) => ChatState(
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activeAgent: activeAgent ?? this.activeAgent,
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messages: messages ?? this.messages,
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conversationId: conversationId ?? this.conversationId,
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isStreaming: isStreaming ?? this.isStreaming,
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thinkingText: thinkingText ?? this.thinkingText,
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);
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}
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class SelectedAgentNotifier extends Notifier<ActiveAgent?> {
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@override
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ActiveAgent? build() => null;
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void select(ActiveAgent? a) => state = a;
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}
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final selectedAgentProvider =
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NotifierProvider<SelectedAgentNotifier, ActiveAgent?>(
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SelectedAgentNotifier.new,
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);
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final chatProvider = NotifierProvider<ChatNotifier, ChatState>(
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ChatNotifier.new,
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);
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class ChatNotifier extends Notifier<ChatState> {
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StreamSubscription<Map<String, dynamic>>? _subscription;
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Completer<void>? _streamDone;
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ActiveAgent? _lastTriggeredAgent;
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void markNeedsRebuild() => state = state.copyWith();
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/// 不可变消息操作方法（供 chat_messages_view 新版代码调用）
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Future<String?> confirmMessage(String id) async {
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final msgs = state.messages.toList();
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final i = msgs.indexWhere((m) => m.id == id);
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if (i < 0) return '确认卡片不存在';
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final rawIds = msgs[i].metadata?['confirmationIds'];
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final confirmationIds = rawIds is List
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? rawIds.map((e) => e.toString()).where((e) => e.isNotEmpty).toList()
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: <String>[];
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if (confirmationIds.isEmpty) {
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return '确认信息已失效，请重新发送需要录入的内容';
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}
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try {
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final api = ref.read(apiClientProvider);
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for (final confirmationId in confirmationIds.toList()) {
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final response = await api.post('/api/ai/confirm-write/$confirmationId');
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final body = response.data;
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if (body is! Map || body['code'] != 0) {
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return body is Map ? body['message']?.toString() ?? '录入失败' : '录入失败';
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}
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confirmationIds.remove(confirmationId);
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msgs[i].metadata?['confirmationIds'] = confirmationIds.toList();
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state = state.copyWith(messages: msgs);
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}
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} catch (e) {
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return '录入失败，请检查网络后重试';
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}
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msgs[i].confirmed = true;
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state = state.copyWith(messages: msgs);
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ref.invalidate(medicationListProvider);
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ref.invalidate(medicationReminderProvider);
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ref.invalidate(latestHealthProvider);
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ref.invalidate(currentExercisePlanProvider);
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return null;
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}
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@override
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ChatState build() {
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ref.onDispose(() {
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_subscription?.cancel();
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_subscription = null;
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if (_streamDone != null && !_streamDone!.isCompleted) {
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_streamDone!.complete();
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}
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_streamDone = null;
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});
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Future.microtask(() {
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insertTaskCard();
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});
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return const ChatState();
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}
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void insertTaskCard() {
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if (state.messages.any((m) => m.type == MessageType.taskCard)) return;
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state = state.copyWith(
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messages: [
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ChatMessage(
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id: 'task_card',
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role: 'assistant',
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content: '',
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createdAt: DateTime.now(),
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type: MessageType.taskCard,
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),
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...state.messages,
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],
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);
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}
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void setAgent(ActiveAgent a) {
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// 流式回复中忽略胶囊切换，防止状态混乱
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if (state.isStreaming) return;
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_cancelActiveStream();
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state = state.copyWith(activeAgent: a);
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ref.read(selectedAgentProvider.notifier).select(a);
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}
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/// 根据 AI 调用的工具自动切换智能体胶囊
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void _switchAgentByTool(String tool) {
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ActiveAgent? agent;
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switch (tool) {
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case 'record_health_data':
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case 'query_health_records':
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agent = ActiveAgent.health;
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break;
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case 'estimate_food_text':
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agent = ActiveAgent.diet;
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break;
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case 'manage_medication':
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agent = ActiveAgent.medication;
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break;
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case 'manage_exercise':
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agent = ActiveAgent.exercise;
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break;
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case 'request_doctor':
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agent = ActiveAgent.consultation;
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break;
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case 'analyze_report':
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agent = ActiveAgent.report;
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break;
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}
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if (agent != null) {
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ref.read(selectedAgentProvider.notifier).select(agent);
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state = state.copyWith(activeAgent: agent);
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}
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}
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Future<void> loadConversation(String convId) async {
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await _cancelActiveStream();
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try {
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final api = ref.read(apiClientProvider);
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final res = await api.get('/api/ai/conversations/$convId');
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final rawMessages = (res.data['data'] as List?) ?? [];
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final messages = rawMessages.map((m) {
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final map = m as Map<String, dynamic>;
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return ChatMessage(
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id: map['id']?.toString() ?? '',
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role: map['role']?.toString() ?? 'user',
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content: map['content']?.toString() ?? '',
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createdAt:
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DateTime.tryParse(map['createdAt']?.toString() ?? '') ??
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DateTime.now(),
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type: MessageType.text,
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);
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}).toList();
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state = state.copyWith(
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messages: messages,
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conversationId: convId,
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activeAgent: ActiveAgent.default_,
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);
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ref.read(selectedAgentProvider.notifier).select(ActiveAgent.default_);
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} catch (_) {}
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}
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void insertAgentWelcome(ActiveAgent agent) {
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state = state.copyWith(
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messages: [
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...state.messages,
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ChatMessage(
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id: 'welcome_${agent.name}_${DateTime.now().millisecondsSinceEpoch}',
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role: 'assistant',
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content: '',
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createdAt: DateTime.now(),
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type: MessageType.agentWelcome,
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metadata: {'agent': agent.name},
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),
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],
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);
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}
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/// 点击胶囊：先出用户标签 → 0.4 秒后出欢迎卡片，不走 AI
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/// 重复点击同一胶囊不重复弹卡片
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void triggerAgent(ActiveAgent agent, String label) {
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if (_lastTriggeredAgent == agent) return;
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_lastTriggeredAgent = agent;
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final userMsg = ChatMessage(
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id: 'agent_trigger_${DateTime.now().millisecondsSinceEpoch}',
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role: 'user',
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content: label,
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createdAt: DateTime.now(),
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);
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state = state.copyWith(messages: [...state.messages, userMsg]);
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Future.delayed(const Duration(milliseconds: 400), () {
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insertAgentWelcome(agent);
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});
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}
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Future<void> sendImage(String imagePath, String text) async {
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final file = File(imagePath);
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if (!await file.exists()) return;
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_lastTriggeredAgent = null;
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// 先显示用户消息（本地显示图片路径）
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final userMsg = ChatMessage(
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id: '${DateTime.now().millisecondsSinceEpoch}',
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role: 'user',
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content: text.isNotEmpty ? text : '[图片]',
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createdAt: DateTime.now(),
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metadata: {'localImagePath': imagePath},
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);
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state = state.copyWith(messages: [...state.messages, userMsg]);
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// 异步上传图片
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String? uploadedUrl;
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Object? uploadError;
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try {
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final api = ref.read(apiClientProvider);
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uploadedUrl = await api.uploadFile('/api/files/upload', file);
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} catch (e) {
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uploadError = e;
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}
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// 更新消息元数据（保留本地路径 + 添加远程URL）
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final updatedMsgs = state.messages.toList();
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final idx = updatedMsgs.indexWhere((m) => m.id == userMsg.id);
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if (idx >= 0) {
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final meta = <String, dynamic>{'localImagePath': imagePath};
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if (uploadedUrl != null) meta['imageUrl'] = uploadedUrl;
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updatedMsgs[idx] = ChatMessage(
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id: userMsg.id,
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role: 'user',
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content: userMsg.content,
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createdAt: userMsg.createdAt,
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metadata: meta,
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);
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state = state.copyWith(messages: updatedMsgs);
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}
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if (uploadedUrl == null) {
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final errorMsg = ChatMessage(
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id: '${DateTime.now().millisecondsSinceEpoch}_upload_error',
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role: 'assistant',
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content: uploadError == null ? '图片上传失败，请稍后重试。' : '图片上传失败，请检查文件大小或网络后重试。',
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createdAt: DateTime.now(),
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);
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state = state.copyWith(messages: [...state.messages, errorMsg]);
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return;
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}
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// 将图片 URL 作为消息内容发送给 AI
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final msgWithImage = text.isNotEmpty ? '$text\n[图片已上传]' : '[图片已上传]';
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await _sendToAI(msgWithImage);
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}
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Future<void> sendMessage(String text) async {
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if (text.trim().isEmpty || state.isStreaming) return;
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_lastTriggeredAgent = null;
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final userMsg = ChatMessage(
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id: '${DateTime.now().millisecondsSinceEpoch}',
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role: 'user',
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content: text,
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createdAt: DateTime.now(),
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);
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state = state.copyWith(
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messages: [...state.messages, userMsg],
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isStreaming: true,
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);
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await _sendToAI(text);
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}
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Future<void> _sendToAI(String text) async {
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final aiMsg = ChatMessage(
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id: '${DateTime.now().millisecondsSinceEpoch}_ai',
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role: 'assistant',
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content: '',
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createdAt: DateTime.now(),
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);
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// 立即加入空 AI 消息，让思考动画有载体
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state = state.copyWith(
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messages: [...state.messages, aiMsg],
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isStreaming: true,
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);
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try {
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final token = await ref.read(apiClientProvider).accessToken;
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if (token == null) {
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_addError(aiMsg, '未登录，请重新登录');
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return;
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}
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// 始终用 unified 智能体，AI 自动判断意图分配工具
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final stream = SseHandler.connect(
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agentType: 'unified',
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message: text,
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conversationId: state.conversationId,
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token: token,
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);
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await _cancelActiveStream();
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final done = Completer<void>();
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_streamDone = done;
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_subscription = stream.listen(
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(event) => _processEvent(event, aiMsg),
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onError: (_) {
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_addError(aiMsg, '网络异常，请稍后重试');
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if (!done.isCompleted) done.complete();
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},
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onDone: () {
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if (!done.isCompleted) done.complete();
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},
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cancelOnError: true,
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);
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await done.future;
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if (_streamDone == done) {
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_streamDone = null;
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_subscription = null;
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}
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if (state.isStreaming) {
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_done(aiMsg);
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}
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} catch (e) {
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_addError(aiMsg, '网络异常，请稍后重试');
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}
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}
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Future<void> _cancelActiveStream() async {
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await _subscription?.cancel();
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_subscription = null;
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if (_streamDone != null && !_streamDone!.isCompleted) {
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_streamDone!.complete();
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}
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_streamDone = null;
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}
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void _addError(ChatMessage aiMsg, String errorText) {
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aiMsg.content = errorText;
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aiMsg.type = MessageType.text;
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final u = state.messages.toList();
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final i = u.indexWhere((x) => x.id == aiMsg.id);
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if (i >= 0) {
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u[i] = aiMsg;
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} else {
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u.add(aiMsg);
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}
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state = state.copyWith(messages: u, isStreaming: false, thinkingText: null);
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}
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void _processEvent(Map<String, dynamic> j, ChatMessage aiMsg) {
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final a = j['action'] as String?;
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switch (a) {
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case 'conversation_id':
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state = state.copyWith(conversationId: j['data']?.toString());
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case 'answer':
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final messageType = j['type'] as String? ?? 'text';
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aiMsg.type = _parseMessageType(messageType);
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if (j['metadata'] is Map) {
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aiMsg.metadata = Map<String, dynamic>.from(j['metadata']);
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}
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aiMsg.content += (j['data'] as String?) ?? '';
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state = state.copyWith(thinkingText: null);
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_update(aiMsg);
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case 'notice':
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state = state.copyWith(thinkingText: j['message'] as String?);
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case 'tool_result':
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final tool = j['tool'] as String? ?? '';
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// 根据 AI 调用的工具自动切换智能体胶囊
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_switchAgentByTool(tool);
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if (tool == 'record_health_data') {
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ref.invalidate(latestHealthProvider);
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}
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case 'status':
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_done(aiMsg);
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case 'error':
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_done(aiMsg);
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}
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}
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MessageType _parseMessageType(String type) {
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switch (type) {
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case 'data_confirm':
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case 'medication_confirm':
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return MessageType.dataConfirm;
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case 'agent_welcome':
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return MessageType.agentWelcome;
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default:
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return MessageType.text;
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}
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}
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void _update(ChatMessage m) {
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final u = state.messages.toList();
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final i = u.indexWhere((x) => x.id == m.id);
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if (i >= 0) {
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u[i] = m;
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} else {
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u.add(m); // 空内容也加入，让思考气泡有载体
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}
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state = state.copyWith(messages: u);
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}
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void _done(ChatMessage m) {
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final u = state.messages.toList();
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final content = m.content.trim();
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if (content.isEmpty && m.type == MessageType.text) {
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m.content = '暂时没有收到回复，请稍后再试。';
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}
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final i = u.indexWhere((x) => x.id == m.id);
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if (i >= 0) {
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u[i] = m;
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} else {
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u.add(m);
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}
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state = state.copyWith(messages: u, isStreaming: false, thinkingText: null);
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}
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}
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