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- <span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js"><span class="cstat-no" title="statement not covered" ><span class="fstat-no" title="function not covered" ><span class="branch-0 cbranch-no" title="branch not covered" >/**</span></span></span>
- * 大纲生成节点(集成容错机制)
- */
-
- import { GraphState } from '../graph';
- import { bookStore } from '../book-generator.store';
- import { callLLMWithMessages } from '../../../services/llm';
- import { parseOutline } from '../parsers/outline.parser';
- import { buildOutlineMessages, SCALE_CHAPTER_RANGE } from '../prompts/builder';
- import { PROGRESS } from '../utils';
- import { callLLMWithRetry, executeNodeWithTimeout, FAULT_TOLERANCE_CONFIG } from '../fault-tolerance';
- import { getChapterRange } from '../book-type-config';
-
- <span class="cstat-no" title="statement not covered" >export async function generateOutlineNode(state: typeof GraphState.State): Promise<Partial<typeof GraphState.State>> {</span>
- <span class="cstat-no" title="statement not covered" > console.log('[LangGraph] 生成大纲, bookId:', state.bookId, 'scale:', state.bookScale);</span>
-
- // 读取前序规划节点的分析结果,用于指导大纲生成
- <span class="cstat-no" title="statement not covered" > let bookPlan: any = null;</span>
- <span class="cstat-no" title="statement not covered" > if (state.bookPlan) {</span>
- <span class="cstat-no" title="statement not covered" > try {</span>
- <span class="cstat-no" title="statement not covered" > bookPlan = JSON.parse(state.bookPlan);</span>
- <span class="cstat-no" title="statement not covered" > console.log('[LangGraph] 使用规划结果指导大纲:', bookPlan.structureLogic, bookPlan.writingStyle);</span>
- <span class="cstat-no" title="statement not covered" > } catch {</span>
- <span class="cstat-no" title="statement not covered" > console.warn('[LangGraph] bookPlan 解析失败,忽略');</span>
- <span class="cstat-no" title="statement not covered" > }</span>
- <span class="cstat-no" title="statement not covered" > }</span>
-
- <span class="cstat-no" title="statement not covered" > try {</span>
- // 使用容错包装器执行AI调用
- <span class="cstat-no" title="statement not covered" > const response = await executeNodeWithTimeout(</span>
- <span class="cstat-no" title="statement not covered" > state.bookId,</span>
- <span class="cstat-no" title="statement not covered" > 'generate_outline',</span>
- <span class="cstat-no" title="statement not covered" > async () => {</span>
- <span class="cstat-no" title="statement not covered" > return callLLMWithRetry(</span>
- <span class="cstat-no" title="statement not covered" > buildOutlineMessages(state.topic, state.bookScale, state.description, bookPlan),</span>
- <span class="cstat-no" title="statement not covered" > undefined,</span>
- <span class="cstat-no" title="statement not covered" > {</span>
- <span class="cstat-no" title="statement not covered" > bookId: state.bookId,</span>
- <span class="cstat-no" title="statement not covered" > nodeId: 'generate_outline',</span>
- <span class="cstat-no" title="statement not covered" > attempt: 0,</span>
- <span class="cstat-no" title="statement not covered" > maxAttempts: FAULT_TOLERANCE_CONFIG.aiRetry.maxRetries,</span>
- <span class="cstat-no" title="statement not covered" > }</span>
- <span class="cstat-no" title="statement not covered" > );</span>
- <span class="cstat-no" title="statement not covered" > },</span>
- <span class="cstat-no" title="statement not covered" > FAULT_TOLERANCE_CONFIG.nodeTimeout.generate_outline</span>
- <span class="cstat-no" title="statement not covered" > );</span>
-
- <span class="cstat-no" title="statement not covered" > const outline = parseOutline(response);</span>
- <span class="cstat-no" title="statement not covered" > if (!outline) throw new Error('大纲解析失败');</span>
-
- // 校验章节数:允许 ±20% 浮动,超出才截断/补充
- <span class="cstat-no" title="statement not covered" > const targetChapters = SCALE_CHAPTER_RANGE[state.bookScale as keyof typeof SCALE_CHAPTER_RANGE];</span>
- <span class="cstat-no" title="statement not covered" > if (targetChapters) {</span>
- <span class="cstat-no" title="statement not covered" > const { min: minAllowed, max: maxAllowed } = getChapterRange(targetChapters);</span>
- <span class="cstat-no" title="statement not covered" > const actual = outline.chapters.length;</span>
-
- <span class="cstat-no" title="statement not covered" > if (actual > maxAllowed) {</span>
- <span class="cstat-no" title="statement not covered" > console.warn(`[LangGraph] AI 返回章节数 ${actual} 超出上限 ${maxAllowed},截断`);</span>
- <span class="cstat-no" title="statement not covered" > outline.chapters = outline.chapters.slice(0, maxAllowed);</span>
- <span class="cstat-no" title="statement not covered" > } else if (actual < minAllowed) {</span>
- <span class="cstat-no" title="statement not covered" > console.warn(`[LangGraph] AI 返回章节数 ${actual} 少于下限 ${minAllowed},使用话题相关的默认章节补充`);</span>
- <span class="cstat-no" title="statement not covered" > const topicHint = state.topic?.substring(0, 30) || '';</span>
- <span class="cstat-no" title="statement not covered" > const perChapterWords = Math.round(parseInt(state.bookScale) / minAllowed);</span>
- <span class="cstat-no" title="statement not covered" > const gapTopics = [</span>
- <span class="cstat-no" title="statement not covered" > `概述与背景`,</span>
- <span class="cstat-no" title="statement not covered" > `核心概念`,</span>
- <span class="cstat-no" title="statement not covered" > `深入探究`,</span>
- <span class="cstat-no" title="statement not covered" > `应用与实践`,</span>
- <span class="cstat-no" title="statement not covered" > `总结与展望`,</span>
- <span class="cstat-no" title="statement not covered" > ];</span>
- <span class="cstat-no" title="statement not covered" > while (outline.chapters.length < minAllowed) {</span>
- <span class="cstat-no" title="statement not covered" > const idx = outline.chapters.length;</span>
- <span class="cstat-no" title="statement not covered" > const gapTitle = gapTopics[idx % gapTopics.length];</span>
- <span class="cstat-no" title="statement not covered" > outline.chapters.push({</span>
- <span class="cstat-no" title="statement not covered" > number: idx + 1,</span>
- <span class="cstat-no" title="statement not covered" > title: topicHint ? `第${idx + 1}章 ${topicHint} - ${gapTitle}` : `第${idx + 1}章 ${gapTitle}`,</span>
- <span class="cstat-no" title="statement not covered" > summary: `本章围绕"${topicHint || gapTitle}"展开,介绍${gapTitle}相关内容。`,</span>
- <span class="cstat-no" title="statement not covered" > keyPoints: [gapTitle, '关键知识点', '实践要点'],</span>
- <span class="cstat-no" title="statement not covered" > estimatedWords: perChapterWords,</span>
- <span class="cstat-no" title="statement not covered" > });</span>
- <span class="cstat-no" title="statement not covered" > }</span>
- <span class="cstat-no" title="statement not covered" > }</span>
- // 在范围内(±20%)不做任何处理,让 AI 自己决定
- <span class="cstat-no" title="statement not covered" > }</span>
-
- // 短文类至少1个章节
- <span class="cstat-no" title="statement not covered" > if (outline.chapters.length === 0) {</span>
- <span class="cstat-no" title="statement not covered" > console.warn('[LangGraph] AI 返回章节数为0,使用话题创建默认章节');</span>
- <span class="cstat-no" title="statement not covered" > const fallbackTitle = state.topic?.substring(0, 50) || '正文';</span>
- <span class="cstat-no" title="statement not covered" > outline.chapters = [{</span>
- <span class="cstat-no" title="statement not covered" > number: 1,</span>
- <span class="cstat-no" title="statement not covered" > title: fallbackTitle,</span>
- <span class="cstat-no" title="statement not covered" > summary: `关于"${fallbackTitle}"的全面介绍,涵盖核心概念、关键知识和实践要点。`,</span>
- <span class="cstat-no" title="statement not covered" > keyPoints: ['核心概念', '关键知识', '实践要点'],</span>
- <span class="cstat-no" title="statement not covered" > estimatedWords: parseInt(state.bookScale) || 800,</span>
- <span class="cstat-no" title="statement not covered" > }];</span>
- <span class="cstat-no" title="statement not covered" > }</span>
-
- <span class="cstat-no" title="statement not covered" > const totalChapters = outline.chapters.length;</span>
- <span class="cstat-no" title="statement not covered" > await bookStore.update(state.bookId, {</span>
- <span class="cstat-no" title="statement not covered" > totalChapters,</span>
- <span class="cstat-no" title="statement not covered" > outlineJson: JSON.stringify(outline),</span>
- <span class="cstat-no" title="statement not covered" > progress: PROGRESS.OUTLINE_DONE</span>
- <span class="cstat-no" title="statement not covered" > });</span>
- <span class="cstat-no" title="statement not covered" > await bookStore.createChapters(state.bookId, outline.chapters.map(c => ({</span>
- <span class="cstat-no" title="statement not covered" > number: c.number,</span>
- <span class="cstat-no" title="statement not covered" > title: c.title,</span>
- <span class="cstat-no" title="statement not covered" > summary: c.summary,</span>
- <span class="cstat-no" title="statement not covered" > keyPoints: c.keyPoints,</span>
- <span class="cstat-no" title="statement not covered" > estimatedWords: c.estimatedWords,</span>
- <span class="cstat-no" title="statement not covered" > })));</span>
-
- <span class="cstat-no" title="statement not covered" > console.log('[LangGraph] 大纲生成完成,章节数:', outline.chapters.length);</span>
- <span class="cstat-no" title="statement not covered" > return { progress: PROGRESS.OUTLINE_DONE };</span>
- <span class="cstat-no" title="statement not covered" > } catch (error) {</span>
- <span class="cstat-no" title="statement not covered" > console.error('[LangGraph] 大纲生成失败:', error);</span>
- // 更新书籍状态为失败
- <span class="cstat-no" title="statement not covered" > await bookStore.update(state.bookId, {</span>
- <span class="cstat-no" title="statement not covered" > genStage: 'failed',</span>
- <span class="cstat-no" title="statement not covered" > failedStage: 'outlining',</span>
- <span class="cstat-no" title="statement not covered" > errorMsg: error instanceof Error ? error.message : '大纲生成失败',</span>
- <span class="cstat-no" title="statement not covered" > });</span>
- <span class="cstat-no" title="statement not covered" > return {</span>
- <span class="cstat-no" title="statement not covered" > error: error instanceof Error ? error.message : '大纲生成失败',</span>
- <span class="cstat-no" title="statement not covered" > finished: true</span>
- <span class="cstat-no" title="statement not covered" > };</span>
- <span class="cstat-no" title="statement not covered" > }</span>
- <span class="cstat-no" title="statement not covered" >}</span>
- </pre></td></tr></table></pre>
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