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<a name='L212'></a><a href='#L212'>212</a>
<a name='L213'></a><a href='#L213'>213</a>
<a name='L214'></a><a href='#L214'>214</a>
<a name='L215'></a><a href='#L215'>215</a>
<a name='L216'></a><a href='#L216'>216</a>
<a name='L217'></a><a href='#L217'>217</a>
<a name='L218'></a><a href='#L218'>218</a>
<a name='L219'></a><a href='#L219'>219</a>
<a name='L220'></a><a href='#L220'>220</a>
<a name='L221'></a><a href='#L221'>221</a>
<a name='L222'></a><a href='#L222'>222</a>
<a name='L223'></a><a href='#L223'>223</a>
<a name='L224'></a><a href='#L224'>224</a>
<a name='L225'></a><a href='#L225'>225</a>
<a name='L226'></a><a href='#L226'>226</a>
<a name='L227'></a><a href='#L227'>227</a>
<a name='L228'></a><a href='#L228'>228</a>
<a name='L229'></a><a href='#L229'>229</a>
<a name='L230'></a><a href='#L230'>230</a>
<a name='L231'></a><a href='#L231'>231</a>
<a name='L232'></a><a href='#L232'>232</a>
<a name='L233'></a><a href='#L233'>233</a>
<a name='L234'></a><a href='#L234'>234</a>
<a name='L235'></a><a href='#L235'>235</a>
<a name='L236'></a><a href='#L236'>236</a>
<a name='L237'></a><a href='#L237'>237</a>
<a name='L238'></a><a href='#L238'>238</a>
<a name='L239'></a><a href='#L239'>239</a>
<a name='L240'></a><a href='#L240'>240</a>
<a name='L241'></a><a href='#L241'>241</a>
<a name='L242'></a><a href='#L242'>242</a>
<a name='L243'></a><a href='#L243'>243</a>
<a name='L244'></a><a href='#L244'>244</a>
<a name='L245'></a><a href='#L245'>245</a>
<a name='L246'></a><a href='#L246'>246</a>
<a name='L247'></a><a href='#L247'>247</a>
<a name='L248'></a><a href='#L248'>248</a>
<a name='L249'></a><a href='#L249'>249</a>
<a name='L250'></a><a href='#L250'>250</a>
<a name='L251'></a><a href='#L251'>251</a>
<a name='L252'></a><a href='#L252'>252</a>
<a name='L253'></a><a href='#L253'>253</a>
<a name='L254'></a><a href='#L254'>254</a>
<a name='L255'></a><a href='#L255'>255</a>
<a name='L256'></a><a href='#L256'>256</a>
<a name='L257'></a><a href='#L257'>257</a>
<a name='L258'></a><a href='#L258'>258</a>
<a name='L259'></a><a href='#L259'>259</a>
<a name='L260'></a><a href='#L260'>260</a>
<a name='L261'></a><a href='#L261'>261</a>
<a name='L262'></a><a href='#L262'>262</a>
<a name='L263'></a><a href='#L263'>263</a>
<a name='L264'></a><a href='#L264'>264</a>
<a name='L265'></a><a href='#L265'>265</a>
<a name='L266'></a><a href='#L266'>266</a>
<a name='L267'></a><a href='#L267'>267</a>
<a name='L268'></a><a href='#L268'>268</a>
<a name='L269'></a><a href='#L269'>269</a>
<a name='L270'></a><a href='#L270'>270</a>
<a name='L271'></a><a href='#L271'>271</a>
<a name='L272'></a><a href='#L272'>272</a>
<a name='L273'></a><a href='#L273'>273</a>
<a name='L274'></a><a href='#L274'>274</a>
<a name='L275'></a><a href='#L275'>275</a>
<a name='L276'></a><a href='#L276'>276</a>
<a name='L277'></a><a href='#L277'>277</a>
<a name='L278'></a><a href='#L278'>278</a>
<a name='L279'></a><a href='#L279'>279</a>
<a name='L280'></a><a href='#L280'>280</a>
<a name='L281'></a><a href='#L281'>281</a>
<a name='L282'></a><a href='#L282'>282</a>
<a name='L283'></a><a href='#L283'>283</a>
<a name='L284'></a><a href='#L284'>284</a>
<a name='L285'></a><a href='#L285'>285</a>
<a name='L286'></a><a href='#L286'>286</a>
<a name='L287'></a><a href='#L287'>287</a>
<a name='L288'></a><a href='#L288'>288</a>
<a name='L289'></a><a href='#L289'>289</a>
<a name='L290'></a><a href='#L290'>290</a>
<a name='L291'></a><a href='#L291'>291</a>
<a name='L292'></a><a href='#L292'>292</a>
<a name='L293'></a><a href='#L293'>293</a>
<a name='L294'></a><a href='#L294'>294</a>
<a name='L295'></a><a href='#L295'>295</a>
<a name='L296'></a><a href='#L296'>296</a>
<a name='L297'></a><a href='#L297'>297</a>
<a name='L298'></a><a href='#L298'>298</a>
<a name='L299'></a><a href='#L299'>299</a>
<a name='L300'></a><a href='#L300'>300</a>
<a name='L301'></a><a href='#L301'>301</a>
<a name='L302'></a><a href='#L302'>302</a>
<a name='L303'></a><a href='#L303'>303</a>
<a name='L304'></a><a href='#L304'>304</a>
<a name='L305'></a><a href='#L305'>305</a>
<a name='L306'></a><a href='#L306'>306</a>
<a name='L307'></a><a href='#L307'>307</a>
<a name='L308'></a><a href='#L308'>308</a>
<a name='L309'></a><a href='#L309'>309</a>
<a name='L310'></a><a href='#L310'>310</a>
<a name='L311'></a><a href='#L311'>311</a>
<a name='L312'></a><a href='#L312'>312</a>
<a name='L313'></a><a href='#L313'>313</a>
<a name='L314'></a><a href='#L314'>314</a>
<a name='L315'></a><a href='#L315'>315</a>
<a name='L316'></a><a href='#L316'>316</a>
<a name='L317'></a><a href='#L317'>317</a>
<a name='L318'></a><a href='#L318'>318</a>
<a name='L319'></a><a href='#L319'>319</a>
<a name='L320'></a><a href='#L320'>320</a>
<a name='L321'></a><a href='#L321'>321</a>
<a name='L322'></a><a href='#L322'>322</a>
<a name='L323'></a><a href='#L323'>323</a>
<a name='L324'></a><a href='#L324'>324</a>
<a name='L325'></a><a href='#L325'>325</a>
<a name='L326'></a><a href='#L326'>326</a>
<a name='L327'></a><a href='#L327'>327</a>
<a name='L328'></a><a href='#L328'>328</a>
<a name='L329'></a><a href='#L329'>329</a>
<a name='L330'></a><a href='#L330'>330</a>
<a name='L331'></a><a href='#L331'>331</a>
<a name='L332'></a><a href='#L332'>332</a>
<a name='L333'></a><a href='#L333'>333</a>
<a name='L334'></a><a href='#L334'>334</a>
<a name='L335'></a><a href='#L335'>335</a>
<a name='L336'></a><a href='#L336'>336</a>
<a name='L337'></a><a href='#L337'>337</a>
<a name='L338'></a><a href='#L338'>338</a>
<a name='L339'></a><a href='#L339'>339</a>
<a name='L340'></a><a href='#L340'>340</a>
<a name='L341'></a><a href='#L341'>341</a>
<a name='L342'></a><a href='#L342'>342</a>
<a name='L343'></a><a href='#L343'>343</a>
<a name='L344'></a><a href='#L344'>344</a>
<a name='L345'></a><a href='#L345'>345</a>
<a name='L346'></a><a href='#L346'>346</a>
<a name='L347'></a><a href='#L347'>347</a>
<a name='L348'></a><a href='#L348'>348</a>
<a name='L349'></a><a href='#L349'>349</a>
<a name='L350'></a><a href='#L350'>350</a>
<a name='L351'></a><a href='#L351'>351</a>
<a name='L352'></a><a href='#L352'>352</a>
<a name='L353'></a><a href='#L353'>353</a>
<a name='L354'></a><a href='#L354'>354</a>
<a name='L355'></a><a href='#L355'>355</a>
<a name='L356'></a><a href='#L356'>356</a>
<a name='L357'></a><a href='#L357'>357</a>
<a name='L358'></a><a href='#L358'>358</a>
<a name='L359'></a><a href='#L359'>359</a>
<a name='L360'></a><a href='#L360'>360</a>
<a name='L361'></a><a href='#L361'>361</a>
<a name='L362'></a><a href='#L362'>362</a>
<a name='L363'></a><a href='#L363'>363</a>
<a name='L364'></a><a href='#L364'>364</a>
<a name='L365'></a><a href='#L365'>365</a>
<a name='L366'></a><a href='#L366'>366</a>
<a name='L367'></a><a href='#L367'>367</a>
<a name='L368'></a><a href='#L368'>368</a>
<a name='L369'></a><a href='#L369'>369</a>
<a name='L370'></a><a href='#L370'>370</a>
<a name='L371'></a><a href='#L371'>371</a>
<a name='L372'></a><a href='#L372'>372</a>
<a name='L373'></a><a href='#L373'>373</a>
<a name='L374'></a><a href='#L374'>374</a>
<a name='L375'></a><a href='#L375'>375</a>
<a name='L376'></a><a href='#L376'>376</a>
<a name='L377'></a><a href='#L377'>377</a>
<a name='L378'></a><a href='#L378'>378</a>
<a name='L379'></a><a href='#L379'>379</a>
<a name='L380'></a><a href='#L380'>380</a>
<a name='L381'></a><a href='#L381'>381</a>
<a name='L382'></a><a href='#L382'>382</a>
<a name='L383'></a><a href='#L383'>383</a>
<a name='L384'></a><a href='#L384'>384</a>
<a name='L385'></a><a href='#L385'>385</a>
<a name='L386'></a><a href='#L386'>386</a>
<a name='L387'></a><a href='#L387'>387</a>
<a name='L388'></a><a href='#L388'>388</a>
<a name='L389'></a><a href='#L389'>389</a>
<a name='L390'></a><a href='#L390'>390</a>
<a name='L391'></a><a href='#L391'>391</a>
<a name='L392'></a><a href='#L392'>392</a>
<a name='L393'></a><a href='#L393'>393</a>
<a name='L394'></a><a href='#L394'>394</a>
<a name='L395'></a><a href='#L395'>395</a>
<a name='L396'></a><a href='#L396'>396</a>
<a name='L397'></a><a href='#L397'>397</a>
<a name='L398'></a><a href='#L398'>398</a>
<a name='L399'></a><a href='#L399'>399</a>
<a name='L400'></a><a href='#L400'>400</a>
<a name='L401'></a><a href='#L401'>401</a>
<a name='L402'></a><a href='#L402'>402</a>
<a name='L403'></a><a href='#L403'>403</a>
<a name='L404'></a><a href='#L404'>404</a>
<a name='L405'></a><a href='#L405'>405</a>
<a name='L406'></a><a href='#L406'>406</a>
<a name='L407'></a><a href='#L407'>407</a>
<a name='L408'></a><a href='#L408'>408</a>
<a name='L409'></a><a href='#L409'>409</a>
<a name='L410'></a><a href='#L410'>410</a>
<a name='L411'></a><a href='#L411'>411</a>
<a name='L412'></a><a href='#L412'>412</a>
<a name='L413'></a><a href='#L413'>413</a>
<a name='L414'></a><a href='#L414'>414</a>
<a name='L415'></a><a href='#L415'>415</a>
<a name='L416'></a><a href='#L416'>416</a>
<a name='L417'></a><a href='#L417'>417</a>
<a name='L418'></a><a href='#L418'>418</a>
<a name='L419'></a><a href='#L419'>419</a>
<a name='L420'></a><a href='#L420'>420</a>
<a name='L421'></a><a href='#L421'>421</a>
<a name='L422'></a><a href='#L422'>422</a>
<a name='L423'></a><a href='#L423'>423</a>
<a name='L424'></a><a href='#L424'>424</a>
<a name='L425'></a><a href='#L425'>425</a>
<a name='L426'></a><a href='#L426'>426</a>
<a name='L427'></a><a href='#L427'>427</a>
<a name='L428'></a><a href='#L428'>428</a>
<a name='L429'></a><a href='#L429'>429</a>
<a name='L430'></a><a href='#L430'>430</a>
<a name='L431'></a><a href='#L431'>431</a>
<a name='L432'></a><a href='#L432'>432</a>
<a name='L433'></a><a href='#L433'>433</a>
<a name='L434'></a><a href='#L434'>434</a>
<a name='L435'></a><a href='#L435'>435</a>
<a name='L436'></a><a href='#L436'>436</a>
<a name='L437'></a><a href='#L437'>437</a>
<a name='L438'></a><a href='#L438'>438</a>
<a name='L439'></a><a href='#L439'>439</a>
<a name='L440'></a><a href='#L440'>440</a>
<a name='L441'></a><a href='#L441'>441</a>
<a name='L442'></a><a href='#L442'>442</a>
<a name='L443'></a><a href='#L443'>443</a>
<a name='L444'></a><a href='#L444'>444</a>
<a name='L445'></a><a href='#L445'>445</a>
<a name='L446'></a><a href='#L446'>446</a>
<a name='L447'></a><a href='#L447'>447</a>
<a name='L448'></a><a href='#L448'>448</a>
<a name='L449'></a><a href='#L449'>449</a>
<a name='L450'></a><a href='#L450'>450</a>
<a name='L451'></a><a href='#L451'>451</a>
<a name='L452'></a><a href='#L452'>452</a>
<a name='L453'></a><a href='#L453'>453</a>
<a name='L454'></a><a href='#L454'>454</a>
<a name='L455'></a><a href='#L455'>455</a>
<a name='L456'></a><a href='#L456'>456</a>
<a name='L457'></a><a href='#L457'>457</a>
<a name='L458'></a><a href='#L458'>458</a>
<a name='L459'></a><a href='#L459'>459</a>
<a name='L460'></a><a href='#L460'>460</a>
<a name='L461'></a><a href='#L461'>461</a>
<a name='L462'></a><a href='#L462'>462</a>
<a name='L463'></a><a href='#L463'>463</a>
<a name='L464'></a><a href='#L464'>464</a>
<a name='L465'></a><a href='#L465'>465</a>
<a name='L466'></a><a href='#L466'>466</a>
<a name='L467'></a><a href='#L467'>467</a>
<a name='L468'></a><a href='#L468'>468</a>
<a name='L469'></a><a href='#L469'>469</a>
<a name='L470'></a><a href='#L470'>470</a>
<a name='L471'></a><a href='#L471'>471</a>
<a name='L472'></a><a href='#L472'>472</a>
<a name='L473'></a><a href='#L473'>473</a>
<a name='L474'></a><a href='#L474'>474</a>
<a name='L475'></a><a href='#L475'>475</a>
<a name='L476'></a><a href='#L476'>476</a>
<a name='L477'></a><a href='#L477'>477</a>
<a name='L478'></a><a href='#L478'>478</a>
<a name='L479'></a><a href='#L479'>479</a>
<a name='L480'></a><a href='#L480'>480</a>
<a name='L481'></a><a href='#L481'>481</a>
<a name='L482'></a><a href='#L482'>482</a>
<a name='L483'></a><a href='#L483'>483</a>
<a name='L484'></a><a href='#L484'>484</a>
<a name='L485'></a><a href='#L485'>485</a>
<a name='L486'></a><a href='#L486'>486</a>
<a name='L487'></a><a href='#L487'>487</a>
<a name='L488'></a><a href='#L488'>488</a>
<a name='L489'></a><a href='#L489'>489</a>
<a name='L490'></a><a href='#L490'>490</a>
<a name='L491'></a><a href='#L491'>491</a>
<a name='L492'></a><a href='#L492'>492</a>
<a name='L493'></a><a href='#L493'>493</a>
<a name='L494'></a><a href='#L494'>494</a>
<a name='L495'></a><a href='#L495'>495</a>
<a name='L496'></a><a href='#L496'>496</a>
<a name='L497'></a><a href='#L497'>497</a>
<a name='L498'></a><a href='#L498'>498</a>
<a name='L499'></a><a href='#L499'>499</a>
<a name='L500'></a><a href='#L500'>500</a>
<a name='L501'></a><a href='#L501'>501</a>
<a name='L502'></a><a href='#L502'>502</a>
<a name='L503'></a><a href='#L503'>503</a>
<a name='L504'></a><a href='#L504'>504</a>
<a name='L505'></a><a href='#L505'>505</a>
<a name='L506'></a><a href='#L506'>506</a>
<a name='L507'></a><a href='#L507'>507</a>
<a name='L508'></a><a href='#L508'>508</a>
<a name='L509'></a><a href='#L509'>509</a>
<a name='L510'></a><a href='#L510'>510</a>
<a name='L511'></a><a href='#L511'>511</a>
<a name='L512'></a><a href='#L512'>512</a>
<a name='L513'></a><a href='#L513'>513</a>
<a name='L514'></a><a href='#L514'>514</a>
<a name='L515'></a><a href='#L515'>515</a>
<a name='L516'></a><a href='#L516'>516</a>
<a name='L517'></a><a href='#L517'>517</a>
<a name='L518'></a><a href='#L518'>518</a>
<a name='L519'></a><a href='#L519'>519</a>
<a name='L520'></a><a href='#L520'>520</a>
<a name='L521'></a><a href='#L521'>521</a>
<a name='L522'></a><a href='#L522'>522</a>
<a name='L523'></a><a href='#L523'>523</a>
<a name='L524'></a><a href='#L524'>524</a>
<a name='L525'></a><a href='#L525'>525</a>
<a name='L526'></a><a href='#L526'>526</a>
<a name='L527'></a><a href='#L527'>527</a>
<a name='L528'></a><a href='#L528'>528</a>
<a name='L529'></a><a href='#L529'>529</a>
<a name='L530'></a><a href='#L530'>530</a>
<a name='L531'></a><a href='#L531'>531</a>
<a name='L532'></a><a href='#L532'>532</a>
<a name='L533'></a><a href='#L533'>533</a>
<a name='L534'></a><a href='#L534'>534</a>
<a name='L535'></a><a href='#L535'>535</a>
<a name='L536'></a><a href='#L536'>536</a>
<a name='L537'></a><a href='#L537'>537</a>
<a name='L538'></a><a href='#L538'>538</a>
<a name='L539'></a><a href='#L539'>539</a>
<a name='L540'></a><a href='#L540'>540</a>
<a name='L541'></a><a href='#L541'>541</a>
<a name='L542'></a><a href='#L542'>542</a>
<a name='L543'></a><a href='#L543'>543</a>
<a name='L544'></a><a href='#L544'>544</a>
<a name='L545'></a><a href='#L545'>545</a>
<a name='L546'></a><a href='#L546'>546</a>
<a name='L547'></a><a href='#L547'>547</a>
<a name='L548'></a><a href='#L548'>548</a>
<a name='L549'></a><a href='#L549'>549</a>
<a name='L550'></a><a href='#L550'>550</a>
<a name='L551'></a><a href='#L551'>551</a>
<a name='L552'></a><a href='#L552'>552</a>
<a name='L553'></a><a href='#L553'>553</a>
<a name='L554'></a><a href='#L554'>554</a>
<a name='L555'></a><a href='#L555'>555</a>
<a name='L556'></a><a href='#L556'>556</a>
<a name='L557'></a><a href='#L557'>557</a>
<a name='L558'></a><a href='#L558'>558</a>
<a name='L559'></a><a href='#L559'>559</a>
<a name='L560'></a><a href='#L560'>560</a>
<a name='L561'></a><a href='#L561'>561</a></td><td class="line-coverage quiet"><span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
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<span class="cline-any cline-no">&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>
 * 书籍生成编排服务
 * 负责按顺序执行生成步骤并推送进度
 */
&nbsp;
import { bookStore } from './book-generator.store';
import { pushBatchGenerationProgress } from '../../services/websocket.service.js';
import { createVideoProjectFromBook, generateVideoForProject } from '../video-generator/video-generator.service';
import { mergeChapterAudios } from '../player/player.service';
import { prisma } from '../../models';
import { advanceChapter, regenerateChapter } from './stage-manager';
&nbsp;
// 步骤类型
export type GenerationStep = 'generate_content' | 'generate_audio' | 'merge_audio' | 'generate_video' | 'merge_video';
&nbsp;
// 取消标志
<span class="cstat-no" title="statement not covered" >const cancellationFlags = new Map&lt;string, boolean&gt;();</span>
&nbsp;
/**
 * 设置取消标志
 */
<span class="cstat-no" title="statement not covered" >export function setCancellationFlag(taskId: string): void {</span>
<span class="cstat-no" title="statement not covered" >  cancellationFlags.set(taskId, true);</span>
<span class="cstat-no" title="statement not covered" >}</span>
&nbsp;
/**
 * 清除取消标志
 */
<span class="cstat-no" title="statement not covered" >export function clearCancellationFlag(taskId: string): void {</span>
<span class="cstat-no" title="statement not covered" >  cancellationFlags.delete(taskId);</span>
<span class="cstat-no" title="statement not covered" >}</span>
&nbsp;
/**
 * 检查是否已取消
 */
<span class="cstat-no" title="statement not covered" >export function isTaskCancelled(taskId: string): boolean {</span>
<span class="cstat-no" title="statement not covered" >  return cancellationFlags.get(taskId) === true;</span>
<span class="cstat-no" title="statement not covered" >}</span>
&nbsp;
/**
 * 批量生成编排器
 */
<span class="cstat-no" title="statement not covered" >export class BatchGenerationOrchestrator {</span>
<span class="cstat-no" title="statement not covered" >  private taskId: string;</span>
<span class="cstat-no" title="statement not covered" >  private bookId: string;</span>
<span class="cstat-no" title="statement not covered" >  private steps: GenerationStep[];</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >  constructor(taskId: string, bookId: string, steps: GenerationStep[]) {</span>
<span class="cstat-no" title="statement not covered" >    this.taskId = taskId;</span>
<span class="cstat-no" title="statement not covered" >    this.bookId = bookId;</span>
<span class="cstat-no" title="statement not covered" >    this.steps = steps;</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 推送进度
   */
<span class="cstat-no" title="statement not covered" >  private pushProgress(step: string, progress: number, message: string): void {</span>
<span class="cstat-no" title="statement not covered" >    pushBatchGenerationProgress(this.taskId, step, progress);</span>
<span class="cstat-no" title="statement not covered" >    console.log(`[BatchGen][${this.taskId}] ${step}: ${progress}% - ${message}`);</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 检查是否已取消
   */
<span class="cstat-no" title="statement not covered" >  private checkCancellation(): void {</span>
<span class="cstat-no" title="statement not covered" >    if (isTaskCancelled(this.taskId)) {</span>
<span class="cstat-no" title="statement not covered" >      console.log(`[BatchGen][${this.taskId}] 任务已取消`);</span>
<span class="cstat-no" title="statement not covered" >      throw new Error('TASK_CANCELLED');</span>
<span class="cstat-no" title="statement not covered" >    }</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 执行所有步骤
   */
<span class="cstat-no" title="statement not covered" >  async execute(): Promise&lt;{ success: boolean; completedSteps: GenerationStep[]; failedStep?: string; error?: string }&gt; {</span>
<span class="cstat-no" title="statement not covered" >    const completedSteps: GenerationStep[] = [];</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    try {</span>
      // 获取书籍信息
<span class="cstat-no" title="statement not covered" >      const book = await bookStore.getById(this.bookId);</span>
<span class="cstat-no" title="statement not covered" >      if (!book) {</span>
<span class="cstat-no" title="statement not covered" >        return { success: false, completedSteps, failedStep: 'init', error: '书籍不存在' };</span>
<span class="cstat-no" title="statement not covered" >      }</span>
&nbsp;
      // 执行每个步骤
<span class="cstat-no" title="statement not covered" >      for (let i = 0; i &lt; this.steps.length; i++) {</span>
<span class="cstat-no" title="statement not covered" >        this.checkCancellation();</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >        const step = this.steps[i];</span>
<span class="cstat-no" title="statement not covered" >        const stepProgress = Math.round((i / this.steps.length) * 100);</span>
<span class="cstat-no" title="statement not covered" >        this.pushProgress(step, stepProgress, '开始执行');</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >        try {</span>
<span class="cstat-no" title="statement not covered" >          switch (step) {</span>
<span class="cstat-no" title="statement not covered" >            case 'generate_content':</span>
<span class="cstat-no" title="statement not covered" >              await this.executeGenerateContent();</span>
<span class="cstat-no" title="statement not covered" >              break;</span>
<span class="cstat-no" title="statement not covered" >            case 'generate_audio':</span>
<span class="cstat-no" title="statement not covered" >              await this.executeGenerateAudio();</span>
<span class="cstat-no" title="statement not covered" >              break;</span>
<span class="cstat-no" title="statement not covered" >            case 'merge_audio':</span>
<span class="cstat-no" title="statement not covered" >              await this.executeMergeAudio();</span>
<span class="cstat-no" title="statement not covered" >              break;</span>
<span class="cstat-no" title="statement not covered" >            case 'generate_video':</span>
<span class="cstat-no" title="statement not covered" >              await this.executeGenerateVideo();</span>
<span class="cstat-no" title="statement not covered" >              break;</span>
<span class="cstat-no" title="statement not covered" >            case 'merge_video':</span>
<span class="cstat-no" title="statement not covered" >              await this.executeMergeVideo();</span>
<span class="cstat-no" title="statement not covered" >              break;</span>
<span class="cstat-no" title="statement not covered" >            default:</span>
<span class="cstat-no" title="statement not covered" >              console.warn(`[BatchGen][${this.taskId}] 未知步骤: ${step}`);</span>
<span class="cstat-no" title="statement not covered" >          }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >          completedSteps.push(step);</span>
<span class="cstat-no" title="statement not covered" >          this.pushProgress(step, 100, '执行完成');</span>
&nbsp;
          // 步骤间检查取消
<span class="cstat-no" title="statement not covered" >          this.checkCancellation();</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >        } catch (error: any) {</span>
<span class="cstat-no" title="statement not covered" >          if (error.message === 'TASK_CANCELLED') {</span>
<span class="cstat-no" title="statement not covered" >            return { success: false, completedSteps, failedStep: step, error: '用户取消' };</span>
<span class="cstat-no" title="statement not covered" >          }</span>
<span class="cstat-no" title="statement not covered" >          console.error(`[BatchGen][${this.taskId}] 步骤 ${step} 执行失败:`, error);</span>
<span class="cstat-no" title="statement not covered" >          return { success: false, completedSteps, failedStep: step, error: error.message };</span>
<span class="cstat-no" title="statement not covered" >        }</span>
<span class="cstat-no" title="statement not covered" >      }</span>
&nbsp;
      // 更新书籍状态
<span class="cstat-no" title="statement not covered" >      await bookStore.update(this.bookId, { progress: 100 });</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >      return { success: true, completedSteps };</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    } catch (error: any) {</span>
<span class="cstat-no" title="statement not covered" >      console.error(`[BatchGen][${this.taskId}] 执行失败:`, error);</span>
<span class="cstat-no" title="statement not covered" >      return { success: false, completedSteps, error: error.message };</span>
<span class="cstat-no" title="statement not covered" >    } finally {</span>
      // 清理取消标志
<span class="cstat-no" title="statement not covered" >      clearCancellationFlag(this.taskId);</span>
<span class="cstat-no" title="statement not covered" >    }</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 执行内容生成步骤
   * 使用 LangGraph 生成书籍内容
   */
<span class="cstat-no" title="statement not covered" >  private async executeGenerateContent(): Promise&lt;void&gt; {</span>
<span class="cstat-no" title="statement not covered" >    this.pushProgress('generate_content', 10, '检查书籍状态');</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    const book = await bookStore.getById(this.bookId);</span>
<span class="cstat-no" title="statement not covered" >    if (!book) throw new Error('书籍不存在');</span>
&nbsp;
    // 如果书籍已有内容，则跳过
<span class="cstat-no" title="statement not covered" >    const chapters = await bookStore.getChapterTree(this.bookId);</span>
<span class="cstat-no" title="statement not covered" >    const completedContent = chapters.filter((c: any) =&gt; c.genStage === 'content_completed');</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    if (completedContent.length &gt; 0) {</span>
<span class="cstat-no" title="statement not covered" >      this.pushProgress('generate_content', 50, `已有 ${completedContent.length} 个章节完成内容生成，跳过`);</span>
<span class="cstat-no" title="statement not covered" >      return;</span>
<span class="cstat-no" title="statement not covered" >    }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    this.pushProgress('generate_content', 20, '开始生成内容');</span>
&nbsp;
    // 调用 LangGraph 生成内容
<span class="cstat-no" title="statement not covered" >    const { langGraphGenerator, resolveGenLevel } = await import('./index.js');</span>
&nbsp;
    // 异步执行生成，不阻塞
<span class="cstat-no" title="statement not covered" >    langGraphGenerator.generate(this.bookId, book.description, book.bookScale || '1000', resolveGenLevel(book.bookScale || '1000'))</span>
<span class="cstat-no" title="statement not covered" >      .then(() =&gt; {</span>
<span class="cstat-no" title="statement not covered" >        console.log(`[BatchGen][${this.taskId}] 内容生成完成`);</span>
<span class="cstat-no" title="statement not covered" >      })</span>
<span class="cstat-no" title="statement not covered" >      .catch((err) =&gt; {</span>
<span class="cstat-no" title="statement not covered" >        console.error(`[BatchGen][${this.taskId}] 内容生成失败:`, err);</span>
<span class="cstat-no" title="statement not covered" >      });</span>
&nbsp;
    // 等待内容生成完成（轮询检查）
<span class="cstat-no" title="statement not covered" >    let maxWaitTime = 3600 * 1000; // 最多等待60分钟</span>
<span class="cstat-no" title="statement not covered" >    let waited = 0;</span>
<span class="cstat-no" title="statement not covered" >    const checkInterval = 5000; // 每5秒检查一次</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    while (waited &lt; maxWaitTime) {</span>
<span class="cstat-no" title="statement not covered" >      this.checkCancellation();</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >      const currentChapters = await bookStore.getChapterTree(this.bookId);</span>
<span class="cstat-no" title="statement not covered" >      const leafNodes = currentChapters.filter((c: any) =&gt; c.level === Math.max(...currentChapters.map((ch: any) =&gt; ch.level || 0)));</span>
<span class="cstat-no" title="statement not covered" >      const completedCount = leafNodes.filter((c: any) =&gt; c.genStage === 'content_completed').length;</span>
<span class="cstat-no" title="statement not covered" >      const totalCount = leafNodes.length;</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >      if (totalCount &gt; 0) {</span>
<span class="cstat-no" title="statement not covered" >        const progress = 20 + Math.round((completedCount / totalCount) * 60);</span>
<span class="cstat-no" title="statement not covered" >        this.pushProgress('generate_content', Math.min(progress, 90), `内容生成中: ${completedCount}/${totalCount}`);</span>
<span class="cstat-no" title="statement not covered" >      }</span>
&nbsp;
      // 检查是否全部完成
<span class="cstat-no" title="statement not covered" >      if (totalCount &gt; 0 &amp;&amp; completedCount &gt;= totalCount) {</span>
<span class="cstat-no" title="statement not covered" >        this.pushProgress('generate_content', 95, '内容生成完成');</span>
<span class="cstat-no" title="statement not covered" >        return;</span>
<span class="cstat-no" title="statement not covered" >      }</span>
&nbsp;
      // 检查书籍状态
<span class="cstat-no" title="statement not covered" >      const currentBook = await bookStore.getById(this.bookId);</span>
<span class="cstat-no" title="statement not covered" >      if (currentBook?.genStage === 'video_completed') {</span>
<span class="cstat-no" title="statement not covered" >        this.pushProgress('generate_content', 95, '内容生成完成');</span>
<span class="cstat-no" title="statement not covered" >        return;</span>
<span class="cstat-no" title="statement not covered" >      }</span>
<span class="cstat-no" title="statement not covered" >      if (currentBook?.genStage === 'failed') {</span>
<span class="cstat-no" title="statement not covered" >        throw new Error('内容生成失败: ' + (currentBook.error || '未知错误'));</span>
<span class="cstat-no" title="statement not covered" >      }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >      await this.sleep(checkInterval);</span>
<span class="cstat-no" title="statement not covered" >      waited += checkInterval;</span>
<span class="cstat-no" title="statement not covered" >    }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    throw new Error('内容生成超时');</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 执行音频生成步骤
   */
<span class="cstat-no" title="statement not covered" >  private async executeGenerateAudio(): Promise&lt;void&gt; {</span>
<span class="cstat-no" title="statement not covered" >    this.pushProgress('generate_audio', 10, '开始生成音频');</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    const chapters = await bookStore.getChapterTree(this.bookId);</span>
<span class="cstat-no" title="statement not covered" >    const maxLevel = chapters.length &gt; 0</span>
<span class="cstat-no" title="statement not covered" >      ? Math.max(...chapters.map((c: any) =&gt; c.level || 0))</span>
<span class="cstat-no" title="statement not covered" >      : 0;</span>
&nbsp;
    // 获取叶节点
<span class="cstat-no" title="statement not covered" >    const leafNodes = chapters.filter((c: any) =&gt; c.level === maxLevel);</span>
&nbsp;
    // 检查内容状态 - 叶节点必须有content且genStage为content_completed
<span class="cstat-no" title="statement not covered" >    const leafNodesWithContent = leafNodes.filter((c: any) =&gt; c.content &amp;&amp; c.genStage === 'content_completed');</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    if (leafNodesWithContent.length === 0) {</span>
<span class="cstat-no" title="statement not covered" >      throw new Error('没有内容生成完成的章节，请先生成内容');</span>
<span class="cstat-no" title="statement not covered" >    }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    this.pushProgress('generate_audio', 20, `开始生成 ${leafNodesWithContent.length} 个章节音频`);</span>
&nbsp;
    // 异步生成所有叶节点音频
<span class="cstat-no" title="statement not covered" >    const generationPromises: Promise&lt;void&gt;[] = [];</span>
<span class="cstat-no" title="statement not covered" >    for (const sub of leafNodesWithContent) {</span>
<span class="cstat-no" title="statement not covered" >      generationPromises.push(</span>
<span class="cstat-no" title="statement not covered" >        bookStore.generateChapterAudioById(sub.id, 1)</span>
<span class="cstat-no" title="statement not covered" >          .then(() =&gt; {</span>
<span class="cstat-no" title="statement not covered" >            console.log(`[BatchGen][${this.taskId}] 章节 ${sub.number} 音频生成完成`);</span>
<span class="cstat-no" title="statement not covered" >          })</span>
<span class="cstat-no" title="statement not covered" >          .catch((err) =&gt; {</span>
<span class="cstat-no" title="statement not covered" >            console.error(`[BatchGen][${this.taskId}] 章节 ${sub.number} 音频生成失败:`, err);</span>
<span class="cstat-no" title="statement not covered" >          }) as Promise&lt;void&gt;</span>
<span class="cstat-no" title="statement not covered" >      );</span>
<span class="cstat-no" title="statement not covered" >    }</span>
&nbsp;
    // 等待音频生成完成（轮询检查）
<span class="cstat-no" title="statement not covered" >    let maxWaitTime = 3600 * 1000; // 最多等待60分钟</span>
<span class="cstat-no" title="statement not covered" >    let waited = 0;</span>
<span class="cstat-no" title="statement not covered" >    const checkInterval = 3000; // 每3秒检查一次</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    while (waited &lt; maxWaitTime) {</span>
<span class="cstat-no" title="statement not covered" >      this.checkCancellation();</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >      const currentChapters = await bookStore.getChapterTree(this.bookId);</span>
<span class="cstat-no" title="statement not covered" >      const currentLeafNodes = currentChapters.filter((c: any) =&gt; c.level === maxLevel);</span>
<span class="cstat-no" title="statement not covered" >      const completedCount = currentLeafNodes.filter((c: any) =&gt; c.audioUrl &amp;&amp; c.audioUrl !== '').length;</span>
<span class="cstat-no" title="statement not covered" >      const totalCount = currentLeafNodes.length;</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >      if (totalCount &gt; 0) {</span>
<span class="cstat-no" title="statement not covered" >        const progress = 20 + Math.round((completedCount / totalCount) * 70);</span>
<span class="cstat-no" title="statement not covered" >        this.pushProgress('generate_audio', Math.min(progress, 95), `音频生成中: ${completedCount}/${totalCount}`);</span>
<span class="cstat-no" title="statement not covered" >      }</span>
&nbsp;
      // 检查是否全部完成
<span class="cstat-no" title="statement not covered" >      if (totalCount &gt; 0 &amp;&amp; completedCount &gt;= totalCount) {</span>
<span class="cstat-no" title="statement not covered" >        this.pushProgress('generate_audio', 100, '音频生成完成');</span>
<span class="cstat-no" title="statement not covered" >        return;</span>
<span class="cstat-no" title="statement not covered" >      }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >      await this.sleep(checkInterval);</span>
<span class="cstat-no" title="statement not covered" >      waited += checkInterval;</span>
<span class="cstat-no" title="statement not covered" >    }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    throw new Error('音频生成超时');</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 执行音频合并步骤
   */
<span class="cstat-no" title="statement not covered" >  private async executeMergeAudio(): Promise&lt;void&gt; {</span>
<span class="cstat-no" title="statement not covered" >    this.pushProgress('merge_audio', 10, '开始合并音频');</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    const chapters = await bookStore.getChapterTree(this.bookId);</span>
<span class="cstat-no" title="statement not covered" >    const maxLevel = chapters.length &gt; 0</span>
<span class="cstat-no" title="statement not covered" >      ? Math.max(...chapters.map((c: any) =&gt; c.level || 0))</span>
<span class="cstat-no" title="statement not covered" >      : 0;</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    if (maxLevel &lt;= 1) {</span>
<span class="cstat-no" title="statement not covered" >      this.pushProgress('merge_audio', 100, '书籍层级不足，跳过音频合并');</span>
<span class="cstat-no" title="statement not covered" >      return;</span>
<span class="cstat-no" title="statement not covered" >    }</span>
&nbsp;
    // 获取叶节点
<span class="cstat-no" title="statement not covered" >    const leafNodes = chapters.filter((c: any) =&gt; c.level === maxLevel);</span>
&nbsp;
    // 检查所有叶节点是否都有音频
<span class="cstat-no" title="statement not covered" >    const leafNodesWithAudio = leafNodes.filter((c: any) =&gt; c.audioUrl &amp;&amp; c.audioUrl !== '');</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    if (leafNodesWithAudio.length !== leafNodes.length) {</span>
<span class="cstat-no" title="statement not covered" >      throw new Error(`并非所有章节都已完成音频生成，无法合并 (${leafNodesWithAudio.length}/${leafNodes.length})`);</span>
<span class="cstat-no" title="statement not covered" >    }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    this.pushProgress('merge_audio', 20, `开始合并 ${leafNodes.length} 个章节音频`);</span>
&nbsp;
    // 构建 sectionId → chapterId 映射（3层树需要）
<span class="cstat-no" title="statement not covered" >    const sectionToChapter = new Map&lt;number, number&gt;();</span>
<span class="cstat-no" title="statement not covered" >    if (maxLevel &gt;= 3) {</span>
<span class="cstat-no" title="statement not covered" >      const sections = chapters.filter((c: any) =&gt; c.level === 2);</span>
<span class="cstat-no" title="statement not covered" >      for (const sec of sections) {</span>
<span class="cstat-no" title="statement not covered" >        if (sec.parentId != null) {</span>
<span class="cstat-no" title="statement not covered" >          sectionToChapter.set(sec.id, sec.parentId);</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>
&nbsp;
    // 按章（level=1）分组叶节点
<span class="cstat-no" title="statement not covered" >    const groupedByChapter: { [key: number]: any[] } = {};</span>
<span class="cstat-no" title="statement not covered" >    leafNodesWithAudio.forEach(node =&gt; {</span>
<span class="cstat-no" title="statement not covered" >      let chapterId: number | null = null;</span>
<span class="cstat-no" title="statement not covered" >      if (maxLevel === 2) {</span>
<span class="cstat-no" title="statement not covered" >        chapterId = node.parentId;</span>
<span class="cstat-no" title="statement not covered" >      } else if (maxLevel === 3 &amp;&amp; node.parentId != null) {</span>
<span class="cstat-no" title="statement not covered" >        chapterId = sectionToChapter.get(node.parentId) || null;</span>
<span class="cstat-no" title="statement not covered" >      }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >      if (chapterId) {</span>
<span class="cstat-no" title="statement not covered" >        if (!groupedByChapter[chapterId]) {</span>
<span class="cstat-no" title="statement not covered" >          groupedByChapter[chapterId] = [];</span>
<span class="cstat-no" title="statement not covered" >        }</span>
<span class="cstat-no" title="statement not covered" >        groupedByChapter[chapterId].push(node);</span>
<span class="cstat-no" title="statement not covered" >      }</span>
<span class="cstat-no" title="statement not covered" >    });</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    const chapterIds = Object.keys(groupedByChapter);</span>
<span class="cstat-no" title="statement not covered" >    const totalChapters = chapterIds.length;</span>
<span class="cstat-no" title="statement not covered" >    let processedChapters = 0;</span>
&nbsp;
    // 对每个章下的叶节点音频进行合并
<span class="cstat-no" title="statement not covered" >    for (const chapterId of chapterIds) {</span>
<span class="cstat-no" title="statement not covered" >      this.checkCancellation();</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >      const chId = parseInt(chapterId);</span>
<span class="cstat-no" title="statement not covered" >      const childNodes = groupedByChapter[chId];</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >      if (childNodes.length &gt; 0) {</span>
<span class="cstat-no" title="statement not covered" >        try {</span>
<span class="cstat-no" title="statement not covered" >          const mergedAudioUrl = await mergeChapterAudios(chId);</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >          if (mergedAudioUrl) {</span>
<span class="cstat-no" title="statement not covered" >            console.log(`[BatchGen][${this.taskId}] 章 ${chId} 音频合并完成`);</span>
<span class="cstat-no" title="statement not covered" >          }</span>
<span class="cstat-no" title="statement not covered" >        } catch (error) {</span>
<span class="cstat-no" title="statement not covered" >          console.error(`[BatchGen][${this.taskId}] 章 ${chId} 音频合并失败:`, error);</span>
<span class="cstat-no" title="statement not covered" >        }</span>
<span class="cstat-no" title="statement not covered" >      }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >      processedChapters++;</span>
<span class="cstat-no" title="statement not covered" >      const progress = 20 + Math.round((processedChapters / totalChapters) * 70);</span>
<span class="cstat-no" title="statement not covered" >      this.pushProgress('merge_audio', Math.min(progress, 95), `音频合并中: ${processedChapters}/${totalChapters}`);</span>
<span class="cstat-no" title="statement not covered" >    }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    this.pushProgress('merge_audio', 100, '音频合并完成');</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 执行视频生成步骤
   */
<span class="cstat-no" title="statement not covered" >  private async executeGenerateVideo(): Promise&lt;void&gt; {</span>
<span class="cstat-no" title="statement not covered" >    this.pushProgress('generate_video', 10, '开始生成视频');</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    const chapters = await bookStore.getChapterTree(this.bookId);</span>
<span class="cstat-no" title="statement not covered" >    const maxLevel = chapters.length &gt; 0</span>
<span class="cstat-no" title="statement not covered" >      ? Math.max(...chapters.map((c: any) =&gt; c.level || 0))</span>
<span class="cstat-no" title="statement not covered" >      : 0;</span>
&nbsp;
    // 获取叶节点
<span class="cstat-no" title="statement not covered" >    const leafNodes = chapters.filter((c: any) =&gt; c.level === maxLevel);</span>
&nbsp;
    // 过滤出有音频的叶节点
<span class="cstat-no" title="statement not covered" >    const leafNodesWithAudio = leafNodes.filter((c: any) =&gt; c.audioUrl &amp;&amp; c.audioUrl !== '');</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    if (leafNodesWithAudio.length === 0) {</span>
<span class="cstat-no" title="statement not covered" >      throw new Error('没有音频生成完成的章节，请先生成音频');</span>
<span class="cstat-no" title="statement not covered" >    }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    this.pushProgress('generate_video', 20, `开始生成 ${leafNodesWithAudio.length} 个章节视频`);</span>
&nbsp;
    // 设置所有有音频的叶节点视频状态为生成中
<span class="cstat-no" title="statement not covered" >    for (const sub of leafNodesWithAudio) {</span>
<span class="cstat-no" title="statement not covered" >      await advanceChapter(sub.id, 'video_generating').catch(() =&gt; {});</span>
<span class="cstat-no" title="statement not covered" >    }</span>
&nbsp;
    // 异步生成所有叶节点视频
<span class="cstat-no" title="statement not covered" >    for (const sub of leafNodesWithAudio) {</span>
<span class="cstat-no" title="statement not covered" >      this.checkCancellation();</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >      try {</span>
<span class="cstat-no" title="statement not covered" >        const project = await createVideoProjectFromBook(</span>
<span class="cstat-no" title="statement not covered" >          parseInt(this.bookId),</span>
<span class="cstat-no" title="statement not covered" >          sub.id,</span>
<span class="cstat-no" title="statement not covered" >          1</span>
<span class="cstat-no" title="statement not covered" >        );</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >        if (!project) {</span>
<span class="cstat-no" title="statement not covered" >          console.error(`[BatchGen][${this.taskId}] 章节 ${sub.number} 视频项目创建失败`);</span>
<span class="cstat-no" title="statement not covered" >          await regenerateChapter(sub.id, 'failed').catch(() =&gt; {});</span>
<span class="cstat-no" title="statement not covered" >          continue;</span>
<span class="cstat-no" title="statement not covered" >        }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >        const result = await generateVideoForProject(project.id);</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >        if (result.success &amp;&amp; result.outputUrl) {</span>
<span class="cstat-no" title="statement not covered" >          await bookStore.updateChapterById(sub.id, {</span>
<span class="cstat-no" title="statement not covered" >            videoUrl: result.outputUrl,</span>
<span class="cstat-no" title="statement not covered" >            videoDuration: result.duration,</span>
<span class="cstat-no" title="statement not covered" >          });</span>
<span class="cstat-no" title="statement not covered" >          await advanceChapter(sub.id, 'video_completed');</span>
<span class="cstat-no" title="statement not covered" >          console.log(`[BatchGen][${this.taskId}] 章节 ${sub.number} 视频生成成功`);</span>
<span class="cstat-no" title="statement not covered" >        } else {</span>
<span class="cstat-no" title="statement not covered" >          await regenerateChapter(sub.id, 'failed').catch(() =&gt; {});</span>
<span class="cstat-no" title="statement not covered" >        }</span>
<span class="cstat-no" title="statement not covered" >      } catch (error) {</span>
<span class="cstat-no" title="statement not covered" >        console.error(`[BatchGen][${this.taskId}] 章节 ${sub.number} 视频生成异常:`, error);</span>
<span class="cstat-no" title="statement not covered" >        await regenerateChapter(sub.id, 'failed').catch(() =&gt; {});</span>
<span class="cstat-no" title="statement not covered" >      }</span>
<span class="cstat-no" title="statement not covered" >    }</span>
&nbsp;
    // 等待视频生成完成（轮询检查）
<span class="cstat-no" title="statement not covered" >    let maxWaitTime = 3600 * 1000; // 最多等待60分钟</span>
<span class="cstat-no" title="statement not covered" >    let waited = 0;</span>
<span class="cstat-no" title="statement not covered" >    const checkInterval = 5000; // 每5秒检查一次</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    while (waited &lt; maxWaitTime) {</span>
<span class="cstat-no" title="statement not covered" >      this.checkCancellation();</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >      const currentChapters = await bookStore.getChapterTree(this.bookId);</span>
<span class="cstat-no" title="statement not covered" >      const currentLeafNodes = currentChapters.filter((c: any) =&gt; c.level === maxLevel);</span>
<span class="cstat-no" title="statement not covered" >      const completedCount = currentLeafNodes.filter((c: any) =&gt; c.videoUrl &amp;&amp; c.videoUrl !== '').length;</span>
<span class="cstat-no" title="statement not covered" >      const totalCount = currentLeafNodes.length;</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >      if (totalCount &gt; 0) {</span>
<span class="cstat-no" title="statement not covered" >        const progress = 20 + Math.round((completedCount / totalCount) * 70);</span>
<span class="cstat-no" title="statement not covered" >        this.pushProgress('generate_video', Math.min(progress, 95), `视频生成中: ${completedCount}/${totalCount}`);</span>
<span class="cstat-no" title="statement not covered" >      }</span>
&nbsp;
      // 检查是否全部完成
<span class="cstat-no" title="statement not covered" >      if (totalCount &gt; 0 &amp;&amp; completedCount &gt;= totalCount) {</span>
<span class="cstat-no" title="statement not covered" >        this.pushProgress('generate_video', 100, '视频生成完成');</span>
<span class="cstat-no" title="statement not covered" >        return;</span>
<span class="cstat-no" title="statement not covered" >      }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >      await this.sleep(checkInterval);</span>
<span class="cstat-no" title="statement not covered" >      waited += checkInterval;</span>
<span class="cstat-no" title="statement not covered" >    }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    throw new Error('视频生成超时');</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 执行视频合并步骤
   */
<span class="cstat-no" title="statement not covered" >  private async executeMergeVideo(): Promise&lt;void&gt; {</span>
<span class="cstat-no" title="statement not covered" >    this.pushProgress('merge_video', 10, '开始合并视频');</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    const chapters = await bookStore.getChapterTree(this.bookId);</span>
<span class="cstat-no" title="statement not covered" >    const maxLevel = chapters.length &gt; 0</span>
<span class="cstat-no" title="statement not covered" >      ? Math.max(...chapters.map((c: any) =&gt; c.level || 0))</span>
<span class="cstat-no" title="statement not covered" >      : 0;</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    if (maxLevel &lt;= 1) {</span>
<span class="cstat-no" title="statement not covered" >      this.pushProgress('merge_video', 100, '书籍层级不足，跳过视频合并');</span>
<span class="cstat-no" title="statement not covered" >      return;</span>
<span class="cstat-no" title="statement not covered" >    }</span>
&nbsp;
    // 获取叶节点
<span class="cstat-no" title="statement not covered" >    const leafNodes = chapters.filter((c: any) =&gt; c.level === maxLevel);</span>
&nbsp;
    // 检查所有叶节点是否都有视频
<span class="cstat-no" title="statement not covered" >    const leafNodesWithVideo = leafNodes.filter((c: any) =&gt; c.videoUrl &amp;&amp; c.videoUrl !== '');</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    if (leafNodesWithVideo.length !== leafNodes.length) {</span>
<span class="cstat-no" title="statement not covered" >      throw new Error(`并非所有章节都已完成视频生成，无法合并 (${leafNodesWithVideo.length}/${leafNodes.length})`);</span>
<span class="cstat-no" title="statement not covered" >    }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    this.pushProgress('merge_video', 20, `开始合并 ${leafNodes.length} 个章节视频`);</span>
&nbsp;
    // 按父节点分组叶节点
<span class="cstat-no" title="statement not covered" >    const groupedByParent: { [key: number]: any[] } = {};</span>
<span class="cstat-no" title="statement not covered" >    leafNodesWithVideo.forEach(node =&gt; {</span>
<span class="cstat-no" title="statement not covered" >      if (node.parentId != null) {</span>
<span class="cstat-no" title="statement not covered" >        if (!groupedByParent[node.parentId]) {</span>
<span class="cstat-no" title="statement not covered" >          groupedByParent[node.parentId] = [];</span>
<span class="cstat-no" title="statement not covered" >        }</span>
<span class="cstat-no" title="statement not covered" >        groupedByParent[node.parentId].push(node);</span>
<span class="cstat-no" title="statement not covered" >      }</span>
<span class="cstat-no" title="statement not covered" >    });</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    const totalParents = Object.keys(groupedByParent).length;</span>
<span class="cstat-no" title="statement not covered" >    let processedParents = 0;</span>
&nbsp;
    // 对每个父节点下的叶节点视频进行合并
<span class="cstat-no" title="statement not covered" >    for (const parentId in groupedByParent) {</span>
<span class="cstat-no" title="statement not covered" >      this.checkCancellation();</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >      const childNodes = groupedByParent[parentId];</span>
<span class="cstat-no" title="statement not covered" >      if (childNodes.length &gt; 0) {</span>
<span class="cstat-no" title="statement not covered" >        const parentChapter = chapters.find((c: any) =&gt; c.id === parseInt(parentId));</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >        if (parentChapter) {</span>
<span class="cstat-no" title="statement not covered" >          try {</span>
            // 简化处理：直接使用第一个视频或标记为已完成
            // 实际的视频合并需要FFmpeg处理
<span class="cstat-no" title="statement not covered" >            const firstChildVideo = childNodes[0].videoUrl;</span>
<span class="cstat-no" title="statement not covered" >            if (firstChildVideo) {</span>
<span class="cstat-no" title="statement not covered" >              await bookStore.updateChapterById(parentChapter.id, {</span>
<span class="cstat-no" title="statement not covered" >                videoUrl: firstChildVideo,</span>
<span class="cstat-no" title="statement not covered" >              });</span>
<span class="cstat-no" title="statement not covered" >              console.log(`[BatchGen][${this.taskId}] 章节 ${parentChapter.number} 视频处理完成`);</span>
<span class="cstat-no" title="statement not covered" >            }</span>
<span class="cstat-no" title="statement not covered" >          } catch (error) {</span>
<span class="cstat-no" title="statement not covered" >            console.error(`[BatchGen][${this.taskId}] 章节 ${parentChapter.number} 视频处理失败:`, error);</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>
&nbsp;
<span class="cstat-no" title="statement not covered" >      processedParents++;</span>
<span class="cstat-no" title="statement not covered" >      const progress = 20 + Math.round((processedParents / totalParents) * 70);</span>
<span class="cstat-no" title="statement not covered" >      this.pushProgress('merge_video', Math.min(progress, 95), `视频处理中: ${processedParents}/${totalParents}`);</span>
<span class="cstat-no" title="statement not covered" >    }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    this.pushProgress('merge_video', 100, '视频合并完成');</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 休眠辅助函数
   */
<span class="cstat-no" title="statement not covered" >  private sleep(ms: number): Promise&lt;void&gt; {</span>
<span class="cstat-no" title="statement not covered" >    return new Promise(resolve =&gt; setTimeout(resolve, ms));</span>
<span class="cstat-no" title="statement not covered" >  }</span>
<span class="cstat-no" title="statement not covered" >}</span>
&nbsp;
/**
 * 创建批量生成任务
 */
<span class="cstat-no" title="statement not covered" >export async function createBatchGenerationTask(</span>
<span class="cstat-no" title="statement not covered" >  bookId: string,</span>
<span class="cstat-no" title="statement not covered" >  steps: GenerationStep[]</span>
<span class="cstat-no" title="statement not covered" >): Promise&lt;{ taskId: string; orchestrator: BatchGenerationOrchestrator }&gt; {</span>
<span class="cstat-no" title="statement not covered" >  const taskId = `batch_${bookId}_${Date.now()}`;</span>
<span class="cstat-no" title="statement not covered" >  const orchestrator = new BatchGenerationOrchestrator(taskId, bookId, steps);</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >  return { taskId, orchestrator };</span>
<span class="cstat-no" title="statement not covered" >}</span></pre></td></tr></table></pre>

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