feat(ssa): Complete Phase I-IV intelligent dialogue and tool system development
Phase I - Session Blackboard + READ Layer: - SessionBlackboardService with Postgres-Only cache - DataProfileService for data overview generation - PicoInferenceService for LLM-driven PICO extraction - Frontend DataContextCard and VariableDictionaryPanel - E2E tests: 31/31 passed Phase II - Conversation Layer LLM + Intent Router: - ConversationService with SSE streaming - IntentRouterService (rule-first + LLM fallback, 6 intents) - SystemPromptService with 6-segment dynamic assembly - TokenTruncationService for context management - ChatHandlerService as unified chat entry - Frontend SSAChatPane and useSSAChat hook - E2E tests: 38/38 passed Phase III - Method Consultation + AskUser Standardization: - ToolRegistryService with Repository Pattern - MethodConsultService with DecisionTable + LLM enhancement - AskUserService with global interrupt handling - Frontend AskUserCard component - E2E tests: 13/13 passed Phase IV - Dialogue-Driven Analysis + QPER Integration: - ToolOrchestratorService (plan/execute/report) - analysis_plan SSE event for WorkflowPlan transmission - Dual-channel confirmation (ask_user card + workspace button) - PICO as optional hint for LLM parsing - E2E tests: 25/25 passed R Statistics Service: - 5 new R tools: anova_one, baseline_table, fisher, linear_reg, wilcoxon - Enhanced guardrails and block helpers - Comprehensive test suite (run_all_tools_test.js) Documentation: - Updated system status document (v5.9) - Updated SSA module status and development plan (v1.8) Total E2E: 107/107 passed (Phase I: 31, Phase II: 38, Phase III: 13, Phase IV: 25) Co-authored-by: Cursor <cursoragent@cursor.com>
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backend/src/modules/ssa/routes/chat.routes.ts
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217
backend/src/modules/ssa/routes/chat.routes.ts
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/**
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* Phase II — 统一对话 API 路由
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*
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* POST /sessions/:id/chat — 统一对话入口（SSE 流式）
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* GET /sessions/:id/chat/history — 获取对话历史
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* GET /sessions/:id/chat/conversation — 获取 conversation 元信息
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*
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* SSE 格式：OpenAI Compatible（与前端 useAIStream 兼容）
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* 心跳：5 秒（H1）
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* 竞态保护：placeholder 占位（H3）
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*/
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import { FastifyInstance, FastifyRequest } from 'fastify';
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import { logger } from '../../../common/logging/index.js';
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import { conversationService } from '../services/ConversationService.js';
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import { intentRouterService } from '../services/IntentRouterService.js';
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import { chatHandlerService } from '../services/ChatHandlerService.js';
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import { askUserService } from '../services/AskUserService.js';
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function getUserId(request: FastifyRequest): string {
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const userId = (request as any).user?.userId;
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if (!userId) throw new Error('User not authenticated');
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return userId;
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}
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export default async function chatRoutes(app: FastifyInstance) {
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/**
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* POST /sessions/:id/chat
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* 统一对话入口 — SSE 流式响应
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*/
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app.post('/:id/chat', async (req, reply) => {
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const { id: sessionId } = req.params as { id: string };
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const userId = getUserId(req);
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const { content, enableDeepThinking, metadata } = req.body as {
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content: string;
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enableDeepThinking?: boolean;
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metadata?: Record<string, any>;
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};
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if (!content?.trim()) {
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return reply.status(400).send({ error: '消息内容不能为空' });
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}
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// SSE 响应头
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reply.raw.writeHead(200, {
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'Content-Type': 'text/event-stream',
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'Cache-Control': 'no-cache',
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'Connection': 'keep-alive',
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'Access-Control-Allow-Origin': '*',
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'X-Accel-Buffering': 'no',
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});
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const writer = {
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write: (data: string) => {
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try {
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return reply.raw.write(data);
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} catch {
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return false;
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}
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},
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end: () => {
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try { reply.raw.end(); } catch { /* ignore */ }
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},
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on: (event: string, handler: () => void) => {
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req.raw.on(event, handler);
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},
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};
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try {
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// 1. 获取或创建 Conversation（延迟创建）
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const conversationId = await conversationService.getOrCreateConversation(sessionId, userId);
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// 2. 保存用户消息
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await conversationService.saveUserMessage(conversationId, content.trim());
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// ── H1 全局打断判定 ──
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const pending = await askUserService.getPending(sessionId);
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if (pending) {
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const askUserResponse = metadata?.askUserResponse
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? askUserService.parseResponse(metadata)
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: null;
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if (askUserResponse) {
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// 正常回答问题（含 skip）
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const placeholderMsgId = await conversationService.createAssistantPlaceholder(
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conversationId, 'chat',
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);
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const metaEvent = JSON.stringify({
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type: 'intent_classified',
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intent: 'chat',
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confidence: 1,
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source: 'ask_user_response',
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guardTriggered: false,
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});
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writer.write(`data: ${metaEvent}\n\n`);
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const result = await chatHandlerService.handleAskUserResponse(
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sessionId, conversationId, askUserResponse, writer, placeholderMsgId,
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);
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logger.info('[SSA:Chat] AskUser response handled', {
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sessionId, action: askUserResponse.action, success: result.success,
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});
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writer.end();
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return;
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} else {
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// 用户无视卡片，强行打字转移话题
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await askUserService.clearPending(sessionId);
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logger.info('[SSA:Chat] 用户转移话题，已取消挂起的 ask_user 状态', { sessionId });
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}
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}
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// ── H1 结束 ──
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// 3. 意图分类
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const intentResult = await intentRouterService.classify(content.trim(), sessionId);
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// 发送意图元数据事件（前端可用于 UI 切换）
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const metaEvent = JSON.stringify({
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type: 'intent_classified',
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intent: intentResult.intent,
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confidence: intentResult.confidence,
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source: intentResult.source,
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guardTriggered: intentResult.guardTriggered || false,
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guardMessage: intentResult.guardMessage,
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});
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writer.write(`data: ${metaEvent}\n\n`);
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// 4. 创建 assistant placeholder（H3 竞态保护）
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const placeholderMsgId = await conversationService.createAssistantPlaceholder(
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conversationId, intentResult.intent,
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);
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// 5. 分发到意图处理器
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const result = await chatHandlerService.handle(
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sessionId, conversationId, content.trim(),
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intentResult, writer, placeholderMsgId,
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);
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logger.info('[SSA:Chat] Request completed', {
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sessionId,
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intent: result.intent,
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success: result.success,
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});
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} catch (error: any) {
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logger.error('[SSA:Chat] Unhandled error', {
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sessionId,
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error: error.message,
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});
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const errorEvent = JSON.stringify({
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type: 'error',
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code: 'CHAT_ERROR',
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message: error.message || '处理消息时发生错误',
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});
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try {
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writer.write(`data: ${errorEvent}\n\n`);
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} catch { /* ignore */ }
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} finally {
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writer.end();
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}
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});
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/**
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* GET /sessions/:id/chat/history
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* 获取对话历史消息
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*/
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app.get('/:id/chat/history', async (req, reply) => {
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const { id: sessionId } = req.params as { id: string };
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const conversation = await conversationService.getConversationBySession(sessionId);
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if (!conversation) {
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return reply.send({ messages: [], conversationId: null });
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}
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const messages = await conversationService.getMessages(conversation.id);
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return reply.send({
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conversationId: conversation.id,
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messages: messages.map(m => ({
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id: m.id,
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role: m.role,
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content: m.content,
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thinkingContent: m.thinkingContent,
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intent: (m.metadata as any)?.intent,
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status: (m.metadata as any)?.status,
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createdAt: m.createdAt,
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})),
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});
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});
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/**
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* GET /sessions/:id/chat/conversation
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* 获取 conversation 元信息
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*/
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app.get('/:id/chat/conversation', async (req, reply) => {
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const { id: sessionId } = req.params as { id: string };
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const conversation = await conversationService.getConversationBySession(sessionId);
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if (!conversation) {
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return reply.send({ conversation: null });
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}
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return reply.send({
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conversation: {
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id: conversation.id,
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title: conversation.title,
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messageCount: conversation.messageCount,
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createdAt: conversation.createdAt,
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updatedAt: conversation.updatedAt,
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},
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});
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});
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}
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