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    <title>Code coverage report for modules/book-generator/strategies/base.ts</title>
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<span class="cline-any cline-neutral">&nbsp;</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>
 * 基础策略 - 共享的 graph 执行、进度监控、错误处理逻辑
 */
&nbsp;
import { StateGraph, END } from '@langchain/langgraph';
import { GraphState } from '../graph';
import { bookStore } from '../book-generator.store';
import { startProgressMonitor } from '../fault-tolerance';
&nbsp;
/** 基础策略选项 */
export interface BaseStrategyOptions {
  name: string;
  description: string;
  buildGraph: () =&gt; ReturnType&lt;typeof buildAndCompile&gt;;
}
&nbsp;
<span class="cstat-no" title="statement not covered" >function buildAndCompile() {</span>
<span class="cstat-no" title="statement not covered" >  const workflow = new StateGraph(GraphState);</span>
<span class="cstat-no" title="statement not covered" >  return { workflow, addEdge: workflow.addEdge.bind(workflow) };</span>
<span class="cstat-no" title="statement not covered" >}</span>
&nbsp;
/**
 * 运行一个 LangGraph 工作流并处理结果
 * 所有策略的 graph 执行逻辑相同，只是 graph 结构不同
 */
<span class="cstat-no" title="statement not covered" >export async function runGraphWorkflow(</span>
<span class="cstat-no" title="statement not covered" >  bookId: string,</span>
<span class="cstat-no" title="statement not covered" >  initialState: typeof GraphState.State,</span>
<span class="cstat-no" title="statement not covered" >  workflow: StateGraph&lt;typeof GraphState.State, any, any, any, any&gt;</span>
<span class="cstat-no" title="statement not covered" >): Promise&lt;void&gt; {</span>
<span class="cstat-no" title="statement not covered" >  await bookStore.update(bookId, { genStage: 'outlining', progress: 0 });</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >  const stopMonitor = startProgressMonitor(bookId);</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >  try {</span>
<span class="cstat-no" title="statement not covered" >    const graph = workflow.compile();</span>
<span class="cstat-no" title="statement not covered" >    const stream = await graph.stream(initialState);</span>
<span class="cstat-no" title="statement not covered" >    for await (const step of stream) {</span>
<span class="cstat-no" title="statement not covered" >      const stepName = Object.keys(step).join(',');</span>
<span class="cstat-no" title="statement not covered" >      if (stepName !== 'progress') {</span>
<span class="cstat-no" title="statement not covered" >        console.log(`[Graph] Step:`, stepName);</span>
<span class="cstat-no" title="statement not covered" >      }</span>
<span class="cstat-no" title="statement not covered" >    }</span>
&nbsp;
    // 检查最终状态
<span class="cstat-no" title="statement not covered" >    const finalBook = await bookStore.getById(bookId);</span>
<span class="cstat-no" title="statement not covered" >    if (finalBook &amp;&amp; finalBook.genStage !== 'failed') {</span>
<span class="cstat-no" title="statement not covered" >      const finalStage = finalBook.genStage || 'content_completed';</span>
<span class="cstat-no" title="statement not covered" >      const stageUpdate: any = { progress: 100 };</span>
<span class="cstat-no" title="statement not covered" >      if (['content_completed', 'audio_generating', 'audio_completed'].includes(finalStage)) {</span>
<span class="cstat-no" title="statement not covered" >        stageUpdate.genStage = finalStage;</span>
<span class="cstat-no" title="statement not covered" >      }</span>
<span class="cstat-no" title="statement not covered" >      await bookStore.update(bookId, stageUpdate);</span>
      // 只有最终态 video_completed 才自动发布
<span class="cstat-no" title="statement not covered" >      if (finalStage === 'video_completed') {</span>
<span class="cstat-no" title="statement not covered" >        await bookStore.publishAlbum(bookId);</span>
<span class="cstat-no" title="statement not covered" >      }</span>
<span class="cstat-no" title="statement not covered" >      console.log(`[Strategy] 生成完成，genStage: ${finalStage}`);</span>
<span class="cstat-no" title="statement not covered" >    } else {</span>
<span class="cstat-no" title="statement not covered" >      console.log('[Strategy] 生成失败，保持 failed 状态');</span>
<span class="cstat-no" title="statement not covered" >    }</span>
<span class="cstat-no" title="statement not covered" >  } catch (error) {</span>
<span class="cstat-no" title="statement not covered" >    console.error('[Strategy] 生成失败:', error);</span>
    // 尝试从数据库获取当前真实阶段，作为 failedStage
<span class="cstat-no" title="statement not covered" >    let failedStage = 'outlining';</span>
<span class="cstat-no" title="statement not covered" >    try {</span>
<span class="cstat-no" title="statement not covered" >      const currentBook = await bookStore.getById(bookId);</span>
<span class="cstat-no" title="statement not covered" >      if (currentBook?.genStage) {</span>
<span class="cstat-no" title="statement not covered" >        failedStage = currentBook.genStage;</span>
<span class="cstat-no" title="statement not covered" >      }</span>
<span class="cstat-no" title="statement not covered" >    } catch { /* 取不到就用默认值 */ }</span>
<span class="cstat-no" title="statement not covered" >    await bookStore.update(bookId, {</span>
<span class="cstat-no" title="statement not covered" >      genStage: 'failed',</span>
<span class="cstat-no" title="statement not covered" >      failedStage,</span>
<span class="cstat-no" title="statement not covered" >      errorMsg: error instanceof Error ? error.message : '生成失败',</span>
<span class="cstat-no" title="statement not covered" >    });</span>
<span class="cstat-no" title="statement not covered" >  } finally {</span>
<span class="cstat-no" title="statement not covered" >    stopMonitor();</span>
<span class="cstat-no" title="statement not covered" >  }</span>
<span class="cstat-no" title="statement not covered" >}</span>
&nbsp;</pre></td></tr></table></pre>

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