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  22.         <h1><a href="../../index.html">All files</a> / <a href="index.html">modules/book-generator</a> audio-scanner.ts</h1>
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    249. 

  249. <a name='L184'></a><a href='#L184'>184</a>
    250. 

  250. <a name='L185'></a><a href='#L185'>185</a>
    251. 

  251. <a name='L186'></a><a href='#L186'>186</a>
    252. 

  252. <a name='L187'></a><a href='#L187'>187</a>
    253. 

  253. <a name='L188'></a><a href='#L188'>188</a>
    254. 

  254. <a name='L189'></a><a href='#L189'>189</a>
    255. 

  255. <a name='L190'></a><a href='#L190'>190</a>
    256. 

  256. <a name='L191'></a><a href='#L191'>191</a>
    257. 

  257. <a name='L192'></a><a href='#L192'>192</a>
    258. 

  258. <a name='L193'></a><a href='#L193'>193</a>
    259. 

  259. <a name='L194'></a><a href='#L194'>194</a>
    260. 

  260. <a name='L195'></a><a href='#L195'>195</a>
    261. 

  261. <a name='L196'></a><a href='#L196'>196</a>
    262. 

  262. <a name='L197'></a><a href='#L197'>197</a>
    263. 

  263. <a name='L198'></a><a href='#L198'>198</a>
    264. 

  264. <a name='L199'></a><a href='#L199'>199</a>
    265. 

  265. <a name='L200'></a><a href='#L200'>200</a>
    266. 

  266. <a name='L201'></a><a href='#L201'>201</a>
    267. 

  267. <a name='L202'></a><a href='#L202'>202</a>
    268. 

  268. <a name='L203'></a><a href='#L203'>203</a>
    269. 

  269. <a name='L204'></a><a href='#L204'>204</a>
    270. 

  270. <a name='L205'></a><a href='#L205'>205</a>
    271. 

  271. <a name='L206'></a><a href='#L206'>206</a>
    272. 

  272. <a name='L207'></a><a href='#L207'>207</a>
    273. 

  273. <a name='L208'></a><a href='#L208'>208</a>
    274. 

  274. <a name='L209'></a><a href='#L209'>209</a>
    275. 

  275. <a name='L210'></a><a href='#L210'>210</a>
    276. 

  276. <a name='L211'></a><a href='#L211'>211</a>
    277. 

  277. <a name='L212'></a><a href='#L212'>212</a>
    278. 

  278. <a name='L213'></a><a href='#L213'>213</a>
    279. 

  279. <a name='L214'></a><a href='#L214'>214</a>
    280. 

  280. <a name='L215'></a><a href='#L215'>215</a>
    281. 

  281. <a name='L216'></a><a href='#L216'>216</a>
    282. 

  282. <a name='L217'></a><a href='#L217'>217</a>
    283. 

  283. <a name='L218'></a><a href='#L218'>218</a>
    284. 

  284. <a name='L219'></a><a href='#L219'>219</a>
    285. 

  285. <a name='L220'></a><a href='#L220'>220</a>
    286. 

  286. <a name='L221'></a><a href='#L221'>221</a>
    287. 

  287. <a name='L222'></a><a href='#L222'>222</a>
    288. 

  288. <a name='L223'></a><a href='#L223'>223</a>
    289. 

  289. <a name='L224'></a><a href='#L224'>224</a>
    290. 

  290. <a name='L225'></a><a href='#L225'>225</a>
    291. 

  291. <a name='L226'></a><a href='#L226'>226</a>
    292. 

  292. <a name='L227'></a><a href='#L227'>227</a>
    293. 

  293. <a name='L228'></a><a href='#L228'>228</a>
    294. 

  294. <a name='L229'></a><a href='#L229'>229</a>
    295. 

  295. <a name='L230'></a><a href='#L230'>230</a>
    296. 

  296. <a name='L231'></a><a href='#L231'>231</a>
    297. 

  297. <a name='L232'></a><a href='#L232'>232</a>
    298. 

  298. <a name='L233'></a><a href='#L233'>233</a>
    299. 

  299. <a name='L234'></a><a href='#L234'>234</a>
    300. 

  300. <a name='L235'></a><a href='#L235'>235</a>
    301. 

  301. <a name='L236'></a><a href='#L236'>236</a>
    302. 

  302. <a name='L237'></a><a href='#L237'>237</a>
    303. 

  303. <a name='L238'></a><a href='#L238'>238</a>
    304. 

  304. <a name='L239'></a><a href='#L239'>239</a>
    305. 

  305. <a name='L240'></a><a href='#L240'>240</a>
    306. 

  306. <a name='L241'></a><a href='#L241'>241</a>
    307. 

  307. <a name='L242'></a><a href='#L242'>242</a>
    308. 

  308. <a name='L243'></a><a href='#L243'>243</a>
    309. 

  309. <a name='L244'></a><a href='#L244'>244</a>
    310. 

  310. <a name='L245'></a><a href='#L245'>245</a>
    311. 

  311. <a name='L246'></a><a href='#L246'>246</a>
    312. 

  312. <a name='L247'></a><a href='#L247'>247</a>
    313. 

  313. <a name='L248'></a><a href='#L248'>248</a>
    314. 

  314. <a name='L249'></a><a href='#L249'>249</a>
    315. 

  315. <a name='L250'></a><a href='#L250'>250</a>
    316. 

  316. <a name='L251'></a><a href='#L251'>251</a>
    317. 

  317. <a name='L252'></a><a href='#L252'>252</a>
    318. 

  318. <a name='L253'></a><a href='#L253'>253</a>
    319. 

  319. <a name='L254'></a><a href='#L254'>254</a>
    320. 

  320. <a name='L255'></a><a href='#L255'>255</a>
    321. 

  321. <a name='L256'></a><a href='#L256'>256</a>
    322. 

  322. <a name='L257'></a><a href='#L257'>257</a>
    323. 

  323. <a name='L258'></a><a href='#L258'>258</a>
    324. 

  324. <a name='L259'></a><a href='#L259'>259</a>
    325. 

  325. <a name='L260'></a><a href='#L260'>260</a>
    326. 

  326. <a name='L261'></a><a href='#L261'>261</a>
    327. 

  327. <a name='L262'></a><a href='#L262'>262</a>
    328. 

  328. <a name='L263'></a><a href='#L263'>263</a>
    329. 

  329. <a name='L264'></a><a href='#L264'>264</a>
    330. 

  330. <a name='L265'></a><a href='#L265'>265</a>
    331. 

  331. <a name='L266'></a><a href='#L266'>266</a>
    332. 

  332. <a name='L267'></a><a href='#L267'>267</a>
    333. 

  333. <a name='L268'></a><a href='#L268'>268</a>
    334. 

  334. <a name='L269'></a><a href='#L269'>269</a>
    335. 

  335. <a name='L270'></a><a href='#L270'>270</a>
    336. 

  336. <a name='L271'></a><a href='#L271'>271</a>
    337. 

  337. <a name='L272'></a><a href='#L272'>272</a>
    338. 

  338. <a name='L273'></a><a href='#L273'>273</a>
    339. 

  339. <a name='L274'></a><a href='#L274'>274</a>
    340. 

  340. <a name='L275'></a><a href='#L275'>275</a>
    341. 

  341. <a name='L276'></a><a href='#L276'>276</a>
    342. 

  342. <a name='L277'></a><a href='#L277'>277</a>
    343. 

  343. <a name='L278'></a><a href='#L278'>278</a>
    344. 

  344. <a name='L279'></a><a href='#L279'>279</a>
    345. 

  345. <a name='L280'></a><a href='#L280'>280</a>
    346. 

  346. <a name='L281'></a><a href='#L281'>281</a>
    347. 

  347. <a name='L282'></a><a href='#L282'>282</a>
    348. 

  348. <a name='L283'></a><a href='#L283'>283</a>
    349. 

  349. <a name='L284'></a><a href='#L284'>284</a>
    350. 

  350. <a name='L285'></a><a href='#L285'>285</a>
    351. 

  351. <a name='L286'></a><a href='#L286'>286</a>
    352. 

  352. <a name='L287'></a><a href='#L287'>287</a>
    353. 

  353. <a name='L288'></a><a href='#L288'>288</a>
    354. 

  354. <a name='L289'></a><a href='#L289'>289</a>
    355. 

  355. <a name='L290'></a><a href='#L290'>290</a>
    356. 

  356. <a name='L291'></a><a href='#L291'>291</a>
    357. 

  357. <a name='L292'></a><a href='#L292'>292</a>
    358. 

  358. <a name='L293'></a><a href='#L293'>293</a>
    359. 

  359. <a name='L294'></a><a href='#L294'>294</a>
    360. 

  360. <a name='L295'></a><a href='#L295'>295</a>
    361. 

  361. <a name='L296'></a><a href='#L296'>296</a>
    362. 

  362. <a name='L297'></a><a href='#L297'>297</a></td><td class="line-coverage quiet"><span class="cline-any cline-no">&nbsp;</span>
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  658. <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>
    659. 

  659.  * 音频生成扫描器
    660. 

  660.  *
    661. 

  661.  * 作为 fire-and-forget 触发方式的兜底保障：
    662. 

  662.  * - 定时扫描 content_completed 但无音频的章节，自动入队
    663. 

  663.  * - 发现 audio_generating 卡死（有 audioUrl 但 genStage 没推进）→ 自动修复
    664. 

  664.  * - 统计遗漏修复数量，方便监控告警
    665. 

  665.  *
    666. 

  666.  * 设计原则：
    667. 

  667.  *  1. 纯兜底，不取代 fire-and-forget（保持实时性）
    668. 

  668.  *  2. 幂等安全：已处理的章节不会重复入队
    669. 

  669.  *  3. 可观测：每次扫描输出统计摘要
    670. 

  670.  */
    671. 

  671. &nbsp;
    672. 

  672. import { prisma } from '../../models';
    673. 

  673. import { bookStore } from './book-generator.store';
    674. 

  674. import { tryAutoMerge } from './book-generator.store';
    675. 

  675. &nbsp;
    676. 

  676. // ============ 配置 ============
    677. 

  677. &nbsp;
    678. 

  678. <span class="cstat-no" title="statement not covered" >const SCAN_INTERVAL_MS = 30_000;   // 扫描间隔 30 秒</span>
    679. 

  679. <span class="cstat-no" title="statement not covered" >const LOG_STATS_INTERVAL = 10;     // 每 10 轮输出一次统计摘要</span>
    680. 

  680. &nbsp;
    681. 

  681. // ============ 统计 ============
    682. 

  682. &nbsp;
    683. 

  683. interface ScanStats {
    684. 

  684.   totalScans: number;
    685. 

  685.   foundMissing: number;       // 发现 content_completed 但无音频的章节
    686. 

  686.   enqueuedSuccess: number;    // 成功入队
    687. 

  687.   enqueuedFailed: number;     // 入队失败
    688. 

  688.   fixedStuck: number;         // 修复了卡死状态（有 audioUrl 但 genStage 不对）
    689. 

  689.   lastScanTime: number;
    690. 

  690. }
    691. 

  691. &nbsp;
    692. 

  692. <span class="cstat-no" title="statement not covered" >const stats: ScanStats = {</span>
    693. 

  693. <span class="cstat-no" title="statement not covered" >  totalScans: 0,</span>
    694. 

  694. <span class="cstat-no" title="statement not covered" >  foundMissing: 0,</span>
    695. 

  695. <span class="cstat-no" title="statement not covered" >  enqueuedSuccess: 0,</span>
    696. 

  696. <span class="cstat-no" title="statement not covered" >  enqueuedFailed: 0,</span>
    697. 

  697. <span class="cstat-no" title="statement not covered" >  fixedStuck: 0,</span>
    698. 

  698. <span class="cstat-no" title="statement not covered" >  lastScanTime: 0,</span>
    699. 

  699. <span class="cstat-no" title="statement not covered" >};</span>
    700. 

  700. &nbsp;
    701. 

  701. // ============ 核心扫描 ============
    702. 

  702. &nbsp;
    703. 

  703. /**
    704. 

  704.  * 额外扫描：检查叶节点音频完成但1级章节缺少合并音频的情况
    705. 

  705.  * 修复 advanceChapter 失败导致 tryAutoMerge 被跳过的问题
    706. 

  706.  */
    707. 

  707. <span class="cstat-no" title="statement not covered" >async function scanAndTryAutoMerge(): Promise&lt;void&gt; {</span>
    708. 

  708. <span class="cstat-no" title="statement not covered" >  try {</span>
    709. 

  709.     // 找到所有 audio_completed 的叶节点（level &gt;= 2），其所属1级章节没有合并音频
    710. 

  710. <span class="cstat-no" title="statement not covered" >    const leafNodesWithAudio = await prisma.bookChapter.findMany({</span>
    711. 

  711. <span class="cstat-no" title="statement not covered" >      where: {</span>
    712. 

  712. <span class="cstat-no" title="statement not covered" >        genStage: 'audio_completed',</span>
    713. 

  713. <span class="cstat-no" title="statement not covered" >        audioUrl: { not: '' },</span>
    714. 

  714. <span class="cstat-no" title="statement not covered" >        level: { gte: 2 },</span>
    715. 

  715. <span class="cstat-no" title="statement not covered" >      },</span>
    716. 

  716. <span class="cstat-no" title="statement not covered" >      select: {</span>
    717. 

  717. <span class="cstat-no" title="statement not covered" >        id: true,</span>
    718. 

  718. <span class="cstat-no" title="statement not covered" >        bookId: true,</span>
    719. 

  719. <span class="cstat-no" title="statement not covered" >        level: true,</span>
    720. 

  720. <span class="cstat-no" title="statement not covered" >        parentId: true,</span>
    721. 

  721. <span class="cstat-no" title="statement not covered" >      },</span>
    722. 

  722. <span class="cstat-no" title="statement not covered" >      take: 50,</span>
    723. 

  723. <span class="cstat-no" title="statement not covered" >    });</span>
    724. 

  724. &nbsp;
    725. 

  725.     // 按 parentId (level=2) 或 parentId→parentId (level=3) 分组找到1级章节
    726. 

  726.     // 为避免复杂查询，直接对每个叶节点调用 tryAutoMerge（内部会判断是否所有兄弟节点都已就绪）
    727. 

  727. <span class="cstat-no" title="statement not covered" >    for (const leaf of leafNodesWithAudio) {</span>
    728. 

  728. <span class="cstat-no" title="statement not covered" >      tryAutoMerge(leaf.id, leaf.bookId, leaf.level, leaf.parentId).catch(() =&gt; {});</span>
    729. 

  729. <span class="cstat-no" title="statement not covered" >    }</span>
    730. 

  730. <span class="cstat-no" title="statement not covered" >  } catch (err: any) {</span>
    731. 

  731.     // 不影响主扫描流程
    732. 

  732. <span class="cstat-no" title="statement not covered" >  }</span>
    733. 

  733. <span class="cstat-no" title="statement not covered" >}</span>
    734. 

  734. &nbsp;
    735. 

  735. /**
    736. 

  736.  * 扫描并修复：找到 content_completed 但没有音频的叶节点，自动创建 TTS 任务
    737. 

  737.  */
    738. 

  738. <span class="cstat-no" title="statement not covered" >async function scanAndEnqueue(): Promise&lt;void&gt; {</span>
    739. 

  739. <span class="cstat-no" title="statement not covered" >  const startTime = Date.now();</span>
    740. 

  740. <span class="cstat-no" title="statement not covered" >  stats.totalScans++;</span>
    741. 

  741. <span class="cstat-no" title="statement not covered" >  stats.lastScanTime = startTime;</span>
    742. 

  742. &nbsp;
    743. 

  743. <span class="cstat-no" title="statement not covered" >  try {</span>
    744. 

  744.     // ---- 步骤 1：查找遗漏的章节（content_completed 但无音频） ----
    745. 

  745. <span class="cstat-no" title="statement not covered" >    const missingChapters = await prisma.bookChapter.findMany({</span>
    746. 

  746. <span class="cstat-no" title="statement not covered" >      where: {</span>
    747. 

  747. <span class="cstat-no" title="statement not covered" >        genStage: 'content_completed',</span>
    748. 

  748. <span class="cstat-no" title="statement not covered" >        content: { not: null },</span>
    749. 

  749. <span class="cstat-no" title="statement not covered" >        OR: [</span>
    750. 

  750. <span class="cstat-no" title="statement not covered" >          { audioUrl: '' },</span>
    751. 

  751. <span class="cstat-no" title="statement not covered" >          { audioUrl: null },</span>
    752. 

  752. <span class="cstat-no" title="statement not covered" >        ],</span>
    753. 

  753.         // 确保没有进行中的 TTS 任务（避免重复入队）
    754. 

  754. <span class="cstat-no" title="statement not covered" >        ttsTasks: {</span>
    755. 

  755. <span class="cstat-no" title="statement not covered" >          none: { status: { in: ['pending', 'processing'] } },</span>
    756. 

  756. <span class="cstat-no" title="statement not covered" >        },</span>
    757. 

  757. <span class="cstat-no" title="statement not covered" >      },</span>
    758. 

  758. <span class="cstat-no" title="statement not covered" >      include: { book: true },</span>
    759. 

  759. <span class="cstat-no" title="statement not covered" >      take: 50,  // 每次最多处理 50 条，避免一次性拉取过多</span>
    760. 

  760. <span class="cstat-no" title="statement not covered" >      orderBy: { id: 'asc' },</span>
    761. 

  761. <span class="cstat-no" title="statement not covered" >    });</span>
    762. 

  762. &nbsp;
    763. 

  763.     // ---- 步骤 2a：查找卡死章节（audio_generating 且有 audioUrl） ----
    764. 

  764. <span class="cstat-no" title="statement not covered" >    const stuckChapters = await prisma.bookChapter.findMany({</span>
    765. 

  765. <span class="cstat-no" title="statement not covered" >      where: {</span>
    766. 

  766. <span class="cstat-no" title="statement not covered" >        genStage: 'audio_generating',</span>
    767. 

  767. <span class="cstat-no" title="statement not covered" >        audioUrl: { not: '' },</span>
    768. 

  768.         // 确认没有进行中的任务
    769. 

  769. <span class="cstat-no" title="statement not covered" >        ttsTasks: {</span>
    770. 

  770. <span class="cstat-no" title="statement not covered" >          none: { status: { in: ['pending', 'processing'] } },</span>
    771. 

  771. <span class="cstat-no" title="statement not covered" >        },</span>
    772. 

  772. <span class="cstat-no" title="statement not covered" >      },</span>
    773. 

  773. <span class="cstat-no" title="statement not covered" >      take: 50,</span>
    774. 

  774. <span class="cstat-no" title="statement not covered" >      orderBy: { id: 'asc' },</span>
    775. 

  775. <span class="cstat-no" title="statement not covered" >    });</span>
    776. 

  776. &nbsp;
    777. 

  777.     // ---- 步骤 2b：查找 TTS 失败但 genStage 未回退的章节（audio_generating + 无 audioUrl + 无进行中任务） ----
    778. 

  778. <span class="cstat-no" title="statement not covered" >    const orphanAudioChapters = await prisma.bookChapter.findMany({</span>
    779. 

  779. <span class="cstat-no" title="statement not covered" >      where: {</span>
    780. 

  780. <span class="cstat-no" title="statement not covered" >        genStage: 'audio_generating',</span>
    781. 

  781. <span class="cstat-no" title="statement not covered" >        content: { not: null },</span>
    782. 

  782. <span class="cstat-no" title="statement not covered" >        OR: [</span>
    783. 

  783. <span class="cstat-no" title="statement not covered" >          { audioUrl: '' },</span>
    784. 

  784. <span class="cstat-no" title="statement not covered" >          { audioUrl: null },</span>
    785. 

  785. <span class="cstat-no" title="statement not covered" >        ],</span>
    786. 

  786.         // 确认没有进行中的任务
    787. 

  787. <span class="cstat-no" title="statement not covered" >        ttsTasks: {</span>
    788. 

  788. <span class="cstat-no" title="statement not covered" >          none: { status: { in: ['pending', 'processing'] } },</span>
    789. 

  789. <span class="cstat-no" title="statement not covered" >        },</span>
    790. 

  790. <span class="cstat-no" title="statement not covered" >      },</span>
    791. 

  791. <span class="cstat-no" title="statement not covered" >      take: 50,</span>
    792. 

  792. <span class="cstat-no" title="statement not covered" >      orderBy: { id: 'asc' },</span>
    793. 

  793. <span class="cstat-no" title="statement not covered" >    });</span>
    794. 

  794. &nbsp;
    795. 

  795.     // ---- 步骤 3a：修复卡死章节（有音频文件，直接推进 + 触发自动合并检查） ----
    796. 

  796. <span class="cstat-no" title="statement not covered" >    for (const chapter of stuckChapters) {</span>
    797. 

  797. <span class="cstat-no" title="statement not covered" >      try {</span>
    798. 

  798. <span class="cstat-no" title="statement not covered" >        await bookStore.updateChapterById(chapter.id, {</span>
    799. 

  799. <span class="cstat-no" title="statement not covered" >          genStage: 'audio_completed',</span>
    800. 

  800. <span class="cstat-no" title="statement not covered" >        });</span>
    801. 

  801. <span class="cstat-no" title="statement not covered" >        stats.fixedStuck++;</span>
    802. 

  802. <span class="cstat-no" title="statement not covered" >        console.log(`[AudioScanner] 🔧 修复卡死: chapterId=${chapter.id} (audio_generating → audio_completed)`);</span>
    803. 

  803.         // 修复后检查是否需要触发自动合并（advanceChapter 失败时 tryAutoMerge 会被跳过）
    804. 

  804. <span class="cstat-no" title="statement not covered" >        tryAutoMerge(chapter.id, chapter.bookId, chapter.level, chapter.parentId).catch((mergeErr: any) =&gt; {</span>
    805. 

  805. <span class="cstat-no" title="statement not covered" >          console.warn(`[AudioScanner] 修复卡死后自动合并失败 chapterId=${chapter.id}:`, mergeErr.message);</span>
    806. 

  806. <span class="cstat-no" title="statement not covered" >        });</span>
    807. 

  807. <span class="cstat-no" title="statement not covered" >      } catch (err: any) {</span>
    808. 

  808. <span class="cstat-no" title="statement not covered" >        console.error(`[AudioScanner] 修复卡死失败 chapterId=${chapter.id}:`, err.message);</span>
    809. 

  809. <span class="cstat-no" title="statement not covered" >      }</span>
    810. 

  810. <span class="cstat-no" title="statement not covered" >    }</span>
    811. 

  811. &nbsp;
    812. 

  812.     // ---- 步骤 3b：回退孤立的 audio_generating 章节（无音频，TTS 任务已失败但 genStage 未回退） ----
    813. 

  813. <span class="cstat-no" title="statement not covered" >    let orphanFixed = 0;</span>
    814. 

  814. <span class="cstat-no" title="statement not covered" >    for (const chapter of orphanAudioChapters) {</span>
    815. 

  815. <span class="cstat-no" title="statement not covered" >      try {</span>
    816. 

  816.         // 回退到 content_completed，后续扫描会重新入队
    817. 

  817. <span class="cstat-no" title="statement not covered" >        await bookStore.updateChapterById(chapter.id, {</span>
    818. 

  818. <span class="cstat-no" title="statement not covered" >          genStage: 'content_completed',</span>
    819. 

  819. <span class="cstat-no" title="statement not covered" >        });</span>
    820. 

  820. <span class="cstat-no" title="statement not covered" >        orphanFixed++;</span>
    821. 

  821. <span class="cstat-no" title="statement not covered" >        console.log(`[AudioScanner] 🔄 回退孤立场: chapterId=${chapter.id} (audio_generating → content_completed，将重新入队)`);</span>
    822. 

  822. <span class="cstat-no" title="statement not covered" >      } catch (err: any) {</span>
    823. 

  823. <span class="cstat-no" title="statement not covered" >        console.error(`[AudioScanner] 回退孤立场失败 chapterId=${chapter.id}:`, err.message);</span>
    824. 

  824. <span class="cstat-no" title="statement not covered" >      }</span>
    825. 

  825. <span class="cstat-no" title="statement not covered" >    }</span>
    826. 

  826. &nbsp;
    827. 

  827.     // ---- 步骤 4：为遗漏章节创建 TTS 任务（带防死循环保护） ----
    828. 

  828.     // 过滤掉 24h 内已失败超过 MAX_RETRY_PER_DAY 次的章节，避免 Provider 全部不可用时无限重试
    829. 

  829. <span class="cstat-no" title="statement not covered" >    const MAX_RETRY_PER_DAY = 5;</span>
    830. 

  830. <span class="cstat-no" title="statement not covered" >    const twentyFourHoursAgo = new Date(Date.now() - 24 * 60 * 60 * 1000);</span>
    831. 

  831. &nbsp;
    832. 

  832. <span class="cstat-no" title="statement not covered" >    let safeChapters = missingChapters;</span>
    833. 

  833. <span class="cstat-no" title="statement not covered" >    if (missingChapters.length &gt; 0) {</span>
    834. 

  834. <span class="cstat-no" title="statement not covered" >      const failedCounts = await prisma.ttsTask.groupBy({</span>
    835. 

  835. <span class="cstat-no" title="statement not covered" >        by: ['chapterId'],</span>
    836. 

  836. <span class="cstat-no" title="statement not covered" >        where: {</span>
    837. 

  837. <span class="cstat-no" title="statement not covered" >          chapterId: { in: missingChapters.map(c =&gt; c.id) },</span>
    838. 

  838. <span class="cstat-no" title="statement not covered" >          status: 'failed',</span>
    839. 

  839. <span class="cstat-no" title="statement not covered" >          createdAt: { gte: twentyFourHoursAgo },</span>
    840. 

  840. <span class="cstat-no" title="statement not covered" >        },</span>
    841. 

  841. <span class="cstat-no" title="statement not covered" >        _count: { id: true },</span>
    842. 

  842. <span class="cstat-no" title="statement not covered" >      });</span>
    843. 

  843. <span class="cstat-no" title="statement not covered" >      const failedCountMap = new Map(failedCounts.map(f =&gt; [f.chapterId, f._count.id]));</span>
    844. 

  844. &nbsp;
    845. 

  845. <span class="cstat-no" title="statement not covered" >      safeChapters = missingChapters.filter(ch =&gt; {</span>
    846. 

  846. <span class="cstat-no" title="statement not covered" >        const count = failedCountMap.get(ch.id) || 0;</span>
    847. 

  847. <span class="cstat-no" title="statement not covered" >        if (count &gt;= MAX_RETRY_PER_DAY) {</span>
    848. 

  848.           // 超过重试上限 → 标记 failed，用户可以手工重新生成
    849. 

  849. <span class="cstat-no" title="statement not covered" >          bookStore.updateChapterById(ch.id, {</span>
    850. 

  850. <span class="cstat-no" title="statement not covered" >            genStage: 'failed',</span>
    851. 

  851. <span class="cstat-no" title="statement not covered" >            contentError: `TTS重试${count}次全部失败，请手工生成音频`,</span>
    852. 

  852. <span class="cstat-no" title="statement not covered" >          }).catch(() =&gt; {});</span>
    853. 

  853. <span class="cstat-no" title="statement not covered" >          console.log(`[AudioScanner] 🔒 章节${ch.id} 24h内已失败${count}次，标记为failed（等候用户手工处理）`);</span>
    854. 

  854. <span class="cstat-no" title="statement not covered" >          return false;</span>
    855. 

  855. <span class="cstat-no" title="statement not covered" >        }</span>
    856. 

  856. <span class="cstat-no" title="statement not covered" >        return true;</span>
    857. 

  857. <span class="cstat-no" title="statement not covered" >      });</span>
    858. 

  858. &nbsp;
    859. 

  859. <span class="cstat-no" title="statement not covered" >      if (safeChapters.length &gt; 0) {</span>
    860. 

  860. <span class="cstat-no" title="statement not covered" >        console.log(`[AudioScanner] 发现 ${safeChapters.length} 个缺少音频的章节（跳过${missingChapters.length - safeChapters.length}个已达重试上限），开始入队...`);</span>
    861. 

  861. <span class="cstat-no" title="statement not covered" >      }</span>
    862. 

  862. <span class="cstat-no" title="statement not covered" >      stats.foundMissing += safeChapters.length;</span>
    863. 

  863. <span class="cstat-no" title="statement not covered" >    } else {</span>
    864. 

  864. <span class="cstat-no" title="statement not covered" >      stats.foundMissing += missingChapters.length;</span>
    865. 

  865. <span class="cstat-no" title="statement not covered" >    }</span>
    866. 

  866. &nbsp;
    867. 

  867. <span class="cstat-no" title="statement not covered" >    for (const chapter of safeChapters) {</span>
    868. 

  868. <span class="cstat-no" title="statement not covered" >      try {</span>
    869. 

  869. <span class="cstat-no" title="statement not covered" >        const result = await bookStore.generateChapterAudioById(chapter.id);</span>
    870. 

  870. &nbsp;
    871. 

  871. <span class="cstat-no" title="statement not covered" >        if (result === null) {</span>
    872. 

  872.           // 入队失败（可能内容为空等），记录但不计入统计
    873. 

  873. <span class="cstat-no" title="statement not covered" >          console.warn(`[AudioScanner] ⚠️ 入队失败(return null): chapterId=${chapter.id}`);</span>
    874. 

  874. <span class="cstat-no" title="statement not covered" >        } else if (result.audioUrl) {</span>
    875. 

  875.           // 已有音频（复用/已完成），也算成功
    876. 

  876. <span class="cstat-no" title="statement not covered" >          stats.enqueuedSuccess++;</span>
    877. 

  877. <span class="cstat-no" title="statement not covered" >        } else {</span>
    878. 

  878.           // 成功创建 pending 任务
    879. 

  879. <span class="cstat-no" title="statement not covered" >          stats.enqueuedSuccess++;</span>
    880. 

  880. <span class="cstat-no" title="statement not covered" >        }</span>
    881. 

  881. <span class="cstat-no" title="statement not covered" >      } catch (err: any) {</span>
    882. 

  882. <span class="cstat-no" title="statement not covered" >        stats.enqueuedFailed++;</span>
    883. 

  883. <span class="cstat-no" title="statement not covered" >        console.error(`[AudioScanner] ❌ 入队异常 chapterId=${chapter.id}:`, err.message);</span>
    884. 

  884. <span class="cstat-no" title="statement not covered" >      }</span>
    885. 

  885. <span class="cstat-no" title="statement not covered" >    }</span>
    886. 

  886. &nbsp;
    887. 

  887.     // ---- 步骤 5：额外扫描 - 检查叶节点音频完成但1级章节缺少合并音频 ----
    888. 

  888. <span class="cstat-no" title="statement not covered" >    await scanAndTryAutoMerge();</span>
    889. 

  889. &nbsp;
    890. 

  890.     // ---- 步骤 6：输出本轮摘要 ----
    891. 

  891. <span class="cstat-no" title="statement not covered" >    const elapsed = Date.now() - startTime;</span>
    892. 

  892. <span class="cstat-no" title="statement not covered" >    const roundTotal = missingChapters.length + stuckChapters.length + orphanAudioChapters.length;</span>
    893. 

  893. <span class="cstat-no" title="statement not covered" >    if (roundTotal &gt; 0) {</span>
    894. 

  894. <span class="cstat-no" title="statement not covered" >      console.log(</span>
    895. 

  895. <span class="cstat-no" title="statement not covered" >        `[AudioScanner] 本轮扫描完成 (${elapsed}ms): ` +</span>
    896. 

  896. <span class="cstat-no" title="statement not covered" >        `遗漏=${missingChapters.length}, 卡死修复=${stuckChapters.length}, 孤章回退=${orphanFixed}, ` +</span>
    897. 

  897. <span class="cstat-no" title="statement not covered" >        `成功=${stats.enqueuedSuccess}, 失败=${stats.enqueuedFailed}`</span>
    898. 

  898. <span class="cstat-no" title="statement not covered" >      );</span>
    899. 

  899. <span class="cstat-no" title="statement not covered" >    }</span>
    900. 

  900. &nbsp;
    901. 

  901.     // 定期输出累计统计
    902. 

  902. <span class="cstat-no" title="statement not covered" >    if (stats.totalScans % LOG_STATS_INTERVAL === 0) {</span>
    903. 

  903. <span class="cstat-no" title="statement not covered" >      console.log(</span>
    904. 

  904. <span class="cstat-no" title="statement not covered" >        `[AudioScanner] 📊 累计统计: 扫描${stats.totalScans}轮, ` +</span>
    905. 

  905. <span class="cstat-no" title="statement not covered" >        `累计发现遗漏=${stats.foundMissing}, 累计修复卡死=${stats.fixedStuck}, ` +</span>
    906. 

  906. <span class="cstat-no" title="statement not covered" >        `入队成功=${stats.enqueuedSuccess}, 入队失败=${stats.enqueuedFailed}`</span>
    907. 

  907. <span class="cstat-no" title="statement not covered" >      );</span>
    908. 

  908. <span class="cstat-no" title="statement not covered" >    }</span>
    909. 

  909. <span class="cstat-no" title="statement not covered" >  } catch (err: any) {</span>
    910. 

  910. <span class="cstat-no" title="statement not covered" >    console.error(`[AudioScanner] 扫描异常:`, err.message);</span>
    911. 

  911. <span class="cstat-no" title="statement not covered" >  }</span>
    912. 

  912. <span class="cstat-no" title="statement not covered" >}</span>
    913. 

  913. &nbsp;
    914. 

  914. // ============ 生命周期 ============
    915. 

  915. &nbsp;
    916. 

  916. <span class="cstat-no" title="statement not covered" >let timer: ReturnType&lt;typeof setInterval&gt; | null = null;</span>
    917. 

  917. <span class="cstat-no" title="statement not covered" >let isRunning = false;</span>
    918. 

  918. &nbsp;
    919. 

  919. <span class="cstat-no" title="statement not covered" >export function startAudioScanner(): void {</span>
    920. 

  920. <span class="cstat-no" title="statement not covered" >  if (isRunning) {</span>
    921. 

  921. <span class="cstat-no" title="statement not covered" >    console.warn('[AudioScanner] 已在运行，跳过重复启动');</span>
    922. 

  922. <span class="cstat-no" title="statement not covered" >    return;</span>
    923. 

  923. <span class="cstat-no" title="statement not covered" >  }</span>
    924. 

  924. <span class="cstat-no" title="statement not covered" >  isRunning = true;</span>
    925. 

  925. &nbsp;
    926. 

  926. <span class="cstat-no" title="statement not covered" >  console.log(`[AudioScanner] 音频扫描器已启动 (间隔=${SCAN_INTERVAL_MS / 1000}s, 兜底模式)`);</span>
    927. 

  927. &nbsp;
    928. 

  928.   // 启动后立即执行一次扫描（处理上一次运行期间遗留的）
    929. 

  929. <span class="cstat-no" title="statement not covered" >  scanAndEnqueue().catch(err =&gt; {</span>
    930. 

  930. <span class="cstat-no" title="statement not covered" >    console.error('[AudioScanner] 首次扫描失败:', err);</span>
    931. 

  931. <span class="cstat-no" title="statement not covered" >  });</span>
    932. 

  932. &nbsp;
    933. 

  933.   // 定时轮询
    934. 

  934. <span class="cstat-no" title="statement not covered" >  timer = setInterval(() =&gt; {</span>
    935. 

  935. <span class="cstat-no" title="statement not covered" >    scanAndEnqueue().catch(err =&gt; {</span>
    936. 

  936. <span class="cstat-no" title="statement not covered" >      console.error('[AudioScanner] 定时扫描失败:', err);</span>
    937. 

  937. <span class="cstat-no" title="statement not covered" >    });</span>
    938. 

  938. <span class="cstat-no" title="statement not covered" >  }, SCAN_INTERVAL_MS);</span>
    939. 

  939. <span class="cstat-no" title="statement not covered" >}</span>
    940. 

  940. &nbsp;
    941. 

  941. <span class="cstat-no" title="statement not covered" >export function stopAudioScanner(): void {</span>
    942. 

  942. <span class="cstat-no" title="statement not covered" >  if (!isRunning) return;</span>
    943. 

  943. <span class="cstat-no" title="statement not covered" >  isRunning = false;</span>
    944. 

  944. <span class="cstat-no" title="statement not covered" >  if (timer) {</span>
    945. 

  945. <span class="cstat-no" title="statement not covered" >    clearInterval(timer);</span>
    946. 

  946. <span class="cstat-no" title="statement not covered" >    timer = null;</span>
    947. 

  947. <span class="cstat-no" title="statement not covered" >  }</span>
    948. 

  948. <span class="cstat-no" title="statement not covered" >  console.log(`[AudioScanner] 扫描器已停止 (累计: ${stats.totalScans}轮, 修复${stats.fixedStuck}个卡死, 入队${stats.enqueuedSuccess}个遗漏)`);</span>
    949. 

  949. <span class="cstat-no" title="statement not covered" >}</span>
    950. 

  950. &nbsp;
    951. 

  951. <span class="cstat-no" title="statement not covered" >export function getAudioScannerStats(): ScanStats {</span>
    952. 

  952. <span class="cstat-no" title="statement not covered" >  return { ...stats };</span>
    953. 

  953. <span class="cstat-no" title="statement not covered" >}</span>
    954. 

  954. &nbsp;</pre></td></tr></table></pre>
    955. 

  955. 

  956.                 <div class='push'></div><!-- for sticky footer -->
    957. 

  957.             </div><!-- /wrapper -->
    958. 

  958.             <div class='footer quiet pad2 space-top1 center small'>
    959. 

  959.                 Code coverage generated by
    960. 

  960.                 <a href="https://istanbul.js.org/" target="_blank" rel="noopener noreferrer">istanbul</a>
    961. 

  961.                 at 2026-05-19T14:27:48.313Z
    962. 

  962.             </div>
    963. 

  963.         <script src="../../prettify.js"></script>
    964. 

  964.         <script>
    965. 

  965.             window.onload = function () {
    966. 

  966.                 prettyPrint();
    967. 

  967.             };
    968. 

  968.         </script>
    969. 

  969.         <script src="../../sorter.js"></script>
    970. 

  970.         <script src="../../block-navigation.js"></script>
    971. 

  971.     </body>
    972. 

  972. </html>
    973. 

  973.     
    974.