| 1 | import crypto from 'crypto' |
| 2 | import log from 'electron-log/main.js' |
| 3 | import fs from 'fs' |
| 4 | import path from 'path' |
| 5 | import { nanoid } from 'nanoid' |
| 6 | import type { |
| 7 | ImageFulfillmentIntentRecord, |
| 8 | ImageFulfillmentJobRecord, |
| 9 | PPTDatabase |
| 10 | } from '../db/database' |
| 11 | import { imageHistoryLockKey, JobCoordinator } from '../agent-runtime' |
| 12 | import { resolveImageGenerationProvider } from '../agent-runtime/provider/image' |
| 13 | import { allowLocalAssetRoot } from '../io/local-asset-roots' |
| 14 | import { getImageModelDisplayName, resolveConfiguredImageModel } from './model-config' |
| 15 | import type { ParsedVisualIntent, VisualIntentParseResult } from './visual-intent' |
| 16 | import { |
| 17 | adoptFinalizedImageAssets, |
| 18 | stripImageIntentDrafts, |
| 19 | validateFinalizedImageHtml, |
| 20 | type FinalizationAsset |
| 21 | } from './finalization-validator' |
| 22 | |
| 23 | const LEASE_DURATION_SECONDS = 10 * 60 |
| 24 | const FINALIZATION_LEASE_DURATION_SECONDS = 30 * 60 |
| 25 | |
| 26 | type FulfillmentDb = Pick< |
| 27 | PPTDatabase, |
| 28 | | 'createImageFulfillmentJob' |
| 29 | | 'getImageFulfillmentJob' |
| 30 | | 'getImageModelConfig' |
| 31 | | 'claimImageFulfillmentJob' |
| 32 | | 'completeImageFulfillmentJob' |
| 33 | | 'transitionImageFulfillmentJob' |
| 34 | | 'transitionImageFulfillmentIntent' |
| 35 | > |
| 36 | |
| 37 | export type FinalizeAutomaticImageArgs = { |
| 38 | db: FulfillmentDb |
| 39 | coordinator: JobCoordinator |
| 40 | decryptApiKey(value: string): string |
| 41 | resolveSessionProjectDir(sessionId: string): Promise<string> |
| 42 | sessionId: string |
| 43 | sessionPageId: string |
| 44 | runId: string |
| 45 | pageId: string |
| 46 | pageHtmlPath: string |
| 47 | layoutId: string |
| 48 | layoutContractVersion: number |
| 49 | imageModelConfigId: string |
| 50 | parseResult: VisualIntentParseResult |
| 51 | retryOfJobId?: string |
| 52 | retryOfIntentIdBySlot?: Record<string, string> |
| 53 | idempotencyKey?: string |
| 54 | validateCandidateHtml?: (html: string) => string[] |
| 55 | signal?: AbortSignal |
| 56 | refineImageLayout?: ImageLayoutRefinement |
| 57 | } |
| 58 | |
| 59 | export type ImageLayoutRefinement = (assets: Array<{ |
| 60 | slotId: string |
| 61 | layoutSlotId: string |
| 62 | relativePath: string |
| 63 | role: string |
| 64 | prompt: string |
| 65 | }>) => Promise<void> |
| 66 | |
| 67 | export type AutomaticImageFinalizationResult = { |
| 68 | status: 'none' | 'completed' | 'degraded' | 'cancelled' |
| 69 | jobId?: string |
| 70 | error?: string |
| 71 | reused?: boolean |
| 72 | } |
| 73 | |
| 74 | type StagedAsset = FinalizationAsset & { |
| 75 | intent: ImageFulfillmentIntentRecord |
| 76 | stagingPath: string |
| 77 | finalPath: string |
| 78 | mimeType: string |
| 79 | width: number |
| 80 | height: number |
| 81 | prompt: string |
| 82 | } |
| 83 | |
| 84 | const errorMessage = (error: unknown): string => |
| 85 | error instanceof Error && error.message ? error.message : String(error) |
| 86 | |
| 87 | const isAbortError = (error: unknown): boolean => /abort|cancel/i.test(errorMessage(error)) |
| 88 | |
| 89 | const throwIfAborted = (signal?: AbortSignal): void => { |
| 90 | if (signal?.aborted) throw new Error('Image fulfillment cancelled') |
| 91 | } |
| 92 | |
| 93 | const throwIfJobCancelled = async (db: FulfillmentDb, jobId: string): Promise<void> => { |
| 94 | const job = await db.getImageFulfillmentJob(jobId) |
| 95 | if (job?.cancel_requested_at) throw new Error('Image fulfillment cancelled') |
| 96 | } |
| 97 | |
| 98 | const writeFileAtomically = async (targetPath: string, content: string): Promise<void> => { |
| 99 | const tempPath = `${targetPath}.${crypto.randomUUID()}.tmp` |
| 100 | await fs.promises.mkdir(path.dirname(targetPath), { recursive: true }) |
| 101 | try { |
| 102 | await fs.promises.writeFile(tempPath, content, 'utf-8') |
| 103 | await fs.promises.rename(tempPath, targetPath) |
| 104 | } finally { |
| 105 | await fs.promises.rm(tempPath, { force: true }).catch(() => undefined) |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | const sanitizeExtension = (extension: string): string => |
| 110 | /^\.[a-z0-9]{2,5}$/i.test(extension) ? extension.toLowerCase() : '.png' |
| 111 | |
| 112 | type ImageDimensions = { width: number; height: number } |
| 113 | |
| 114 | const readPngDimensions = (bytes: Buffer): ImageDimensions | null => { |
| 115 | if ( |
| 116 | bytes.length < 24 || |
| 117 | bytes.subarray(0, 8).compare(Buffer.from([137, 80, 78, 71, 13, 10, 26, 10])) !== 0 |
| 118 | ) { |
| 119 | return null |
| 120 | } |
| 121 | const width = bytes.readUInt32BE(16) |
| 122 | const height = bytes.readUInt32BE(20) |
| 123 | return width > 0 && height > 0 ? { width, height } : null |
| 124 | } |
| 125 | |
| 126 | const readJpegDimensions = (bytes: Buffer): ImageDimensions | null => { |
| 127 | if (bytes.length < 9 || bytes[0] !== 0xff || bytes[1] !== 0xd8) return null |
| 128 | let offset = 2 |
| 129 | while (offset + 9 <= bytes.length) { |
| 130 | while (offset < bytes.length && bytes[offset] !== 0xff) offset += 1 |
| 131 | while (offset < bytes.length && bytes[offset] === 0xff) offset += 1 |
| 132 | const marker = bytes[offset] |
| 133 | offset += 1 |
| 134 | if (marker === undefined || marker === 0xd9 || marker === 0xda) return null |
| 135 | if (offset + 2 > bytes.length) return null |
| 136 | const length = bytes.readUInt16BE(offset) |
| 137 | if (length < 2 || offset + length > bytes.length) return null |
| 138 | if ( |
| 139 | (marker >= 0xc0 && marker <= 0xc3) || |
| 140 | (marker >= 0xc5 && marker <= 0xc7) || |
| 141 | (marker >= 0xc9 && marker <= 0xcb) || |
| 142 | (marker >= 0xcd && marker <= 0xcf) |
| 143 | ) { |
| 144 | const height = bytes.readUInt16BE(offset + 3) |
| 145 | const width = bytes.readUInt16BE(offset + 5) |
| 146 | return width > 0 && height > 0 ? { width, height } : null |
| 147 | } |
| 148 | offset += length |
| 149 | } |
| 150 | return null |
| 151 | } |
| 152 | |
| 153 | const readWebpDimensions = (bytes: Buffer): ImageDimensions | null => { |
| 154 | if ( |
| 155 | bytes.length < 30 || |
| 156 | bytes.subarray(0, 4).toString('ascii') !== 'RIFF' || |
| 157 | bytes.subarray(8, 12).toString('ascii') !== 'WEBP' |
| 158 | ) { |
| 159 | return null |
| 160 | } |
| 161 | const chunk = bytes.subarray(12, 16).toString('ascii') |
| 162 | if (chunk === 'VP8X') { |
| 163 | const width = bytes.readUIntLE(24, 3) + 1 |
| 164 | const height = bytes.readUIntLE(27, 3) + 1 |
| 165 | return width > 0 && height > 0 ? { width, height } : null |
| 166 | } |
| 167 | if (chunk === 'VP8 ' && bytes.length >= 30) { |
| 168 | const width = bytes.readUInt16LE(26) & 0x3fff |
| 169 | const height = bytes.readUInt16LE(28) & 0x3fff |
| 170 | return width > 0 && height > 0 ? { width, height } : null |
| 171 | } |
| 172 | if (chunk === 'VP8L' && bytes.length >= 25 && bytes[20] === 0x2f) { |
| 173 | const bits = bytes.readUInt32LE(21) |
| 174 | const width = (bits & 0x3fff) + 1 |
| 175 | const height = ((bits >> 14) & 0x3fff) + 1 |
| 176 | return width > 0 && height > 0 ? { width, height } : null |
| 177 | } |
| 178 | return null |
| 179 | } |
| 180 | |
| 181 | const resolveImageDimensions = (bytes: Buffer): ImageDimensions | null => |
| 182 | readPngDimensions(bytes) || readJpegDimensions(bytes) || readWebpDimensions(bytes) |
| 183 | |
| 184 | const toImagePrompt = (intent: ParsedVisualIntent): string => |
| 185 | [ |
| 186 | intent.subject, |
| 187 | intent.textZone ? `Preserve text zone: ${intent.textZone}.` : '', |
| 188 | intent.subjectZone ? `Place subject in: ${intent.subjectZone}.` : '', |
| 189 | intent.negativeSpace ? `Negative space: ${intent.negativeSpace}.` : '', |
| 190 | intent.avoid.length > 0 ? `Avoid: ${intent.avoid.join(', ')}.` : '' |
| 191 | ] |
| 192 | .filter(Boolean) |
| 193 | .join('\n') |
| 194 | |
| 195 | const finalizationAssets = (assets: StagedAsset[]): FinalizationAsset[] => |
| 196 | assets.map((asset) => ({ |
| 197 | slotId: asset.slotId, |
| 198 | layoutSlotId: asset.intent.layout_slot_id, |
| 199 | layer: asset.intent.layer === 'background' ? 'background' : 'visual', |
| 200 | relativePath: asset.relativePath |
| 201 | })) |
| 202 | |
| 203 | const fallbackHtml = async (pageHtmlPath: string, html: string): Promise<void> => |
| 204 | writeFileAtomically(pageHtmlPath, stripImageIntentDrafts(html)) |
| 205 | |
| 206 | const transitionAll = async ( |
| 207 | db: FulfillmentDb, |
| 208 | intents: ImageFulfillmentIntentRecord[], |
| 209 | status: 'fallback' | 'failed' | 'cancelled', |
| 210 | error?: string |
| 211 | ): Promise<void> => { |
| 212 | await Promise.all( |
| 213 | intents.map((intent) => |
| 214 | db.transitionImageFulfillmentIntent({ |
| 215 | intentId: intent.id, |
| 216 | from: ['pending', 'generating', 'generated'], |
| 217 | status, |
| 218 | error: error || null |
| 219 | }) |
| 220 | ) |
| 221 | ) |
| 222 | } |
| 223 | |
| 224 | const createJob = async ( |
| 225 | args: FinalizeAutomaticImageArgs, |
| 226 | intents: ParsedVisualIntent[], |
| 227 | invalidIntents = false |
| 228 | ): Promise<{ |
| 229 | job: ImageFulfillmentJobRecord |
| 230 | intents: ImageFulfillmentIntentRecord[] |
| 231 | created: boolean |
| 232 | }> => { |
| 233 | const modelConfig = await resolveConfiguredImageModel( |
| 234 | { db: args.db, decryptApiKey: args.decryptApiKey }, |
| 235 | args.imageModelConfigId |
| 236 | ) |
| 237 | const contentHash = crypto |
| 238 | .createHash('sha256') |
| 239 | .update(await fs.promises.readFile(args.pageHtmlPath, 'utf-8')) |
| 240 | .digest('hex') |
| 241 | .slice(0, 16) |
| 242 | const created = await args.db.createImageFulfillmentJob({ |
| 243 | runId: args.runId, |
| 244 | sessionId: args.sessionId, |
| 245 | sessionPageId: args.sessionPageId, |
| 246 | pageId: args.pageId, |
| 247 | layoutId: args.layoutId, |
| 248 | layoutContractVersion: args.layoutContractVersion, |
| 249 | imageModelConfigId: modelConfig.id, |
| 250 | imageProvider: modelConfig.provider, |
| 251 | imageModel: getImageModelDisplayName(modelConfig), |
| 252 | idempotencyKey: |
| 253 | args.idempotencyKey || |
| 254 | `${args.runId}:${args.sessionPageId}:${contentHash}:${invalidIntents ? 'invalid' : 'valid'}`, |
| 255 | retryOfJobId: args.retryOfJobId || null, |
| 256 | intents: intents.map((intent, index) => ({ |
| 257 | slotId: intent.slotId || `invalid-${index + 1}`, |
| 258 | layoutSlotId: intent.layoutSlotId || 'invalid', |
| 259 | role: intent.role || 'invalid', |
| 260 | layer: intent.layer || 'visual', |
| 261 | requestVersion: args.layoutContractVersion, |
| 262 | sizeHint: null, |
| 263 | subject: intent.subject || 'Invalid automatic image request', |
| 264 | textZone: intent.textZone || null, |
| 265 | subjectZone: intent.subjectZone || null, |
| 266 | negativeSpace: intent.negativeSpace || null, |
| 267 | avoidJson: JSON.stringify(intent.avoid || []), |
| 268 | requestJson: intent.requestJson || '{}', |
| 269 | retryOfIntentId: args.retryOfIntentIdBySlot?.[intent.slotId] || null |
| 270 | })) |
| 271 | }) |
| 272 | return created |
| 273 | } |
| 274 | |
| 275 | const createInvalidIntentAudit = (args: FinalizeAutomaticImageArgs): ParsedVisualIntent[] => |
| 276 | args.parseResult.invalidIntents.map((intent, index) => ({ |
| 277 | slotId: intent.slotId || `invalid-${index + 1}`, |
| 278 | layoutSlotId: intent.layoutSlotId || 'invalid', |
| 279 | role: 'spot-illustration', |
| 280 | layer: 'visual', |
| 281 | subject: 'Invalid automatic image request', |
| 282 | avoid: [], |
| 283 | requestJson: intent.requestJson || JSON.stringify({ errors: intent.errors }) |
| 284 | })) |
| 285 | |
| 286 | const moveCommittedAssets = async (assets: StagedAsset[]): Promise<void> => { |
| 287 | for (const asset of assets) { |
| 288 | await fs.promises.mkdir(path.dirname(asset.finalPath), { recursive: true }) |
| 289 | await fs.promises.rename(asset.stagingPath, asset.finalPath) |
| 290 | } |
| 291 | } |
| 292 | |
| 293 | const restoreCommittedAssetsToStaging = async (assets: StagedAsset[]): Promise<boolean> => { |
| 294 | const results = await Promise.allSettled( |
| 295 | assets.map(async (asset) => { |
| 296 | if (!fs.existsSync(asset.finalPath)) return |
| 297 | await fs.promises.mkdir(path.dirname(asset.stagingPath), { recursive: true }) |
| 298 | await fs.promises.rename(asset.finalPath, asset.stagingPath) |
| 299 | }) |
| 300 | ) |
| 301 | return results.every((result) => result.status === 'fulfilled') |
| 302 | } |
| 303 | |
| 304 | /** Generates image assets in staging, then validates a scoped page-agent refinement of their slot placement. */ |
| 305 | export const finalizeAutomaticImageIntents = async ( |
| 306 | args: FinalizeAutomaticImageArgs |
| 307 | ): Promise<AutomaticImageFinalizationResult> => { |
| 308 | const originalHtml = await fs.promises.readFile(args.pageHtmlPath, 'utf-8') |
| 309 | if (args.parseResult.status === 'none') { |
| 310 | log.info('[images:fulfillment] no image intents to fulfill', { |
| 311 | sessionId: args.sessionId, |
| 312 | runId: args.runId, |
| 313 | pageId: args.pageId, |
| 314 | layoutId: args.layoutId |
| 315 | }) |
| 316 | return { status: 'none' } |
| 317 | } |
| 318 | |
| 319 | if (args.parseResult.status !== 'valid') { |
| 320 | if (args.parseResult.status === 'forbidden') { |
| 321 | throw new Error(args.parseResult.errors.join('; ') || 'Image intent drafts are forbidden.') |
| 322 | } |
| 323 | const audit = await createJob(args, createInvalidIntentAudit(args), true) |
| 324 | const error = args.parseResult.errors.join('; ') || 'Invalid image intent draft' |
| 325 | log.warn('[images:fulfillment] invalid image intent draft', { |
| 326 | sessionId: args.sessionId, |
| 327 | runId: args.runId, |
| 328 | pageId: args.pageId, |
| 329 | jobId: audit.job.id, |
| 330 | error |
| 331 | }) |
| 332 | await fallbackHtml(args.pageHtmlPath, originalHtml) |
| 333 | await transitionAll(args.db, audit.intents, 'failed', error) |
| 334 | await args.db.transitionImageFulfillmentJob({ |
| 335 | jobId: audit.job.id, |
| 336 | from: ['pending'], |
| 337 | status: 'degraded', |
| 338 | error |
| 339 | }) |
| 340 | return { status: 'degraded', jobId: audit.job.id, error } |
| 341 | } |
| 342 | |
| 343 | const created = await createJob(args, args.parseResult.intents) |
| 344 | if (!created.job || !created.intents.length) return { status: 'none' } |
| 345 | log.info('[images:fulfillment] job prepared', { |
| 346 | sessionId: args.sessionId, |
| 347 | runId: args.runId, |
| 348 | pageId: args.pageId, |
| 349 | jobId: created.job.id, |
| 350 | created: created.created, |
| 351 | layoutId: args.layoutId, |
| 352 | intentCount: created.intents.length, |
| 353 | imageModelConfigId: args.imageModelConfigId |
| 354 | }) |
| 355 | if (!created.created) { |
| 356 | const status = |
| 357 | created.job.status === 'completed' |
| 358 | ? 'completed' |
| 359 | : created.job.status === 'cancelled' |
| 360 | ? 'cancelled' |
| 361 | : created.job.status === 'degraded' || created.job.status === 'failed' |
| 362 | ? 'degraded' |
| 363 | : 'none' |
| 364 | log.info('[images:fulfillment] reusing existing job', { |
| 365 | sessionId: args.sessionId, |
| 366 | runId: args.runId, |
| 367 | pageId: args.pageId, |
| 368 | jobId: created.job.id, |
| 369 | status |
| 370 | }) |
| 371 | return { status, jobId: created.job.id, error: created.job.error || undefined, reused: true } |
| 372 | } |
| 373 | const projectDir = await args.resolveSessionProjectDir(args.sessionId) |
| 374 | const stagingDir = path.join(projectDir, 'images', '.staging', created.job.id) |
| 375 | const manifestPath = path.join(stagingDir, 'manifest.json') |
| 376 | const manifestRelativePath = path.relative(projectDir, manifestPath) |
| 377 | const leaseOwner = `image-fulfillment:${created.job.id}` |
| 378 | const reservation = await args.coordinator.reserve({ |
| 379 | jobId: created.job.id, |
| 380 | domain: 'image', |
| 381 | owner: { kind: 'image-fulfillment', id: created.job.id }, |
| 382 | claims: { write: [imageHistoryLockKey(args.sessionId)] }, |
| 383 | wait: 'block', |
| 384 | signal: args.signal |
| 385 | }) |
| 386 | if (reservation.status === 'busy') { |
| 387 | log.warn('[images:fulfillment] image generation lock is busy', { |
| 388 | sessionId: args.sessionId, |
| 389 | runId: args.runId, |
| 390 | pageId: args.pageId, |
| 391 | jobId: created.job.id |
| 392 | }) |
| 393 | await fallbackHtml(args.pageHtmlPath, originalHtml) |
| 394 | await transitionAll(args.db, created.intents, 'fallback', 'Image generation is busy') |
| 395 | await args.db.transitionImageFulfillmentJob({ |
| 396 | jobId: created.job.id, |
| 397 | from: ['pending'], |
| 398 | status: 'degraded', |
| 399 | error: 'Image generation is busy' |
| 400 | }) |
| 401 | return { status: 'degraded', jobId: created.job.id, error: 'Image generation is busy' } |
| 402 | } |
| 403 | |
| 404 | const lease = reservation.lease |
| 405 | const stagedAssets: StagedAsset[] = [] |
| 406 | let jobInFinalizing = false |
| 407 | let candidatePath = '' |
| 408 | try { |
| 409 | throwIfAborted(lease.signal) |
| 410 | const claimed = await args.db.claimImageFulfillmentJob({ |
| 411 | jobId: created.job.id, |
| 412 | leaseOwner, |
| 413 | leaseDurationSec: LEASE_DURATION_SECONDS |
| 414 | }) |
| 415 | if (!claimed) throw new Error('Image fulfillment job could not be claimed') |
| 416 | const modelConfig = await resolveConfiguredImageModel( |
| 417 | { db: args.db, decryptApiKey: args.decryptApiKey }, |
| 418 | args.imageModelConfigId |
| 419 | ) |
| 420 | const adapter = resolveImageGenerationProvider(modelConfig.provider) |
| 421 | const displayModel = getImageModelDisplayName(modelConfig) |
| 422 | const imageSize = adapter.getDefaultSize(modelConfig) |
| 423 | await fs.promises.mkdir(stagingDir, { recursive: true }) |
| 424 | |
| 425 | const manifest = { |
| 426 | version: 1, |
| 427 | jobId: created.job.id, |
| 428 | sessionId: args.sessionId, |
| 429 | pageId: args.pageId, |
| 430 | pageHtmlPath: args.pageHtmlPath, |
| 431 | fallbackHtmlPath: path.join(stagingDir, 'fallback.html'), |
| 432 | assets: [] as Array<{ |
| 433 | slotId: string |
| 434 | stagingPath: string |
| 435 | finalPath: string |
| 436 | relativePath: string |
| 437 | mimeType: string |
| 438 | width: number |
| 439 | height: number |
| 440 | }> |
| 441 | } |
| 442 | // The recovery contract must exist before any provider output enters staging. |
| 443 | await writeFileAtomically(manifest.fallbackHtmlPath, stripImageIntentDrafts(originalHtml)) |
| 444 | await writeFileAtomically(manifestPath, JSON.stringify(manifest, null, 2)) |
| 445 | const tracked = await args.db.transitionImageFulfillmentJob({ |
| 446 | jobId: created.job.id, |
| 447 | from: ['running'], |
| 448 | status: 'running', |
| 449 | finalizationManifestPath: manifestRelativePath, |
| 450 | imageProvider: modelConfig.provider, |
| 451 | imageModel: displayModel, |
| 452 | leaseOwner, |
| 453 | leaseExpiresAt: Math.floor(Date.now() / 1000) + LEASE_DURATION_SECONDS |
| 454 | }) |
| 455 | if (!tracked) throw new Error('Image fulfillment execution snapshot could not be persisted') |
| 456 | |
| 457 | for (let index = 0; index < args.parseResult.intents.length; index += 1) { |
| 458 | throwIfAborted(lease.signal) |
| 459 | await throwIfJobCancelled(args.db, created.job.id) |
| 460 | const intent = created.intents[index] |
| 461 | const request = args.parseResult.intents[index] |
| 462 | if (!intent || !request) throw new Error('Image fulfillment intent is missing') |
| 463 | await args.db.transitionImageFulfillmentIntent({ |
| 464 | intentId: intent.id, |
| 465 | from: ['pending'], |
| 466 | status: 'generating' |
| 467 | }) |
| 468 | const prompt = toImagePrompt(request) |
| 469 | log.info('[images:fulfillment] provider request', { |
| 470 | sessionId: args.sessionId, |
| 471 | runId: args.runId, |
| 472 | pageId: args.pageId, |
| 473 | jobId: created.job.id, |
| 474 | slotId: request.slotId, |
| 475 | layoutSlotId: request.layoutSlotId, |
| 476 | provider: modelConfig.provider, |
| 477 | model: displayModel, |
| 478 | size: imageSize, |
| 479 | count: 1, |
| 480 | prompt |
| 481 | }) |
| 482 | const results = await adapter.generate(modelConfig, { |
| 483 | prompt, |
| 484 | count: 1, |
| 485 | size: imageSize, |
| 486 | negativePrompt: request.avoid.join(', ') || undefined, |
| 487 | signal: lease.signal |
| 488 | }) |
| 489 | log.info('[images:fulfillment] provider response', { |
| 490 | sessionId: args.sessionId, |
| 491 | runId: args.runId, |
| 492 | pageId: args.pageId, |
| 493 | jobId: created.job.id, |
| 494 | slotId: request.slotId, |
| 495 | assetCount: results.length, |
| 496 | firstAssetBytes: results[0]?.bytes.length || 0, |
| 497 | firstAssetMimeType: results[0]?.mimeType || null |
| 498 | }) |
| 499 | throwIfAborted(lease.signal) |
| 500 | await throwIfJobCancelled(args.db, created.job.id) |
| 501 | const generated = results[0] |
| 502 | if (!generated) throw new Error(`Image provider returned no asset for ${request.slotId}`) |
| 503 | const dimensions = resolveImageDimensions(generated.bytes) |
| 504 | if (!dimensions) throw new Error(`Image provider returned an invalid image for ${request.slotId}`) |
| 505 | const fileName = `generated-${args.pageId}-${nanoid(10)}${sanitizeExtension(generated.extension)}` |
| 506 | const stagingPath = path.join(stagingDir, fileName) |
| 507 | const finalPath = path.join(projectDir, 'images', fileName) |
| 508 | await fs.promises.writeFile(stagingPath, generated.bytes) |
| 509 | const staged: StagedAsset = { |
| 510 | slotId: request.slotId, |
| 511 | relativePath: `./images/${fileName}`, |
| 512 | intent, |
| 513 | stagingPath, |
| 514 | finalPath, |
| 515 | mimeType: generated.mimeType, |
| 516 | width: dimensions.width, |
| 517 | height: dimensions.height, |
| 518 | prompt |
| 519 | } |
| 520 | stagedAssets.push(staged) |
| 521 | await args.db.transitionImageFulfillmentIntent({ |
| 522 | intentId: intent.id, |
| 523 | from: ['generating'], |
| 524 | status: 'generated', |
| 525 | assetPath: staged.relativePath, |
| 526 | mimeType: staged.mimeType, |
| 527 | width: staged.width, |
| 528 | height: staged.height |
| 529 | }) |
| 530 | } |
| 531 | |
| 532 | manifest.assets = stagedAssets.map((asset) => ({ |
| 533 | slotId: asset.slotId, |
| 534 | stagingPath: asset.stagingPath, |
| 535 | finalPath: asset.finalPath, |
| 536 | relativePath: asset.relativePath, |
| 537 | mimeType: asset.mimeType, |
| 538 | width: asset.width, |
| 539 | height: asset.height |
| 540 | })) |
| 541 | await writeFileAtomically(manifestPath, JSON.stringify(manifest, null, 2)) |
| 542 | const movedToFinalizing = await args.db.transitionImageFulfillmentJob({ |
| 543 | jobId: created.job.id, |
| 544 | from: ['running'], |
| 545 | status: 'finalizing', |
| 546 | finalizationManifestPath: manifestRelativePath, |
| 547 | leaseOwner, |
| 548 | leaseExpiresAt: |
| 549 | Math.floor(Date.now() / 1000) + FINALIZATION_LEASE_DURATION_SECONDS |
| 550 | }) |
| 551 | if (!movedToFinalizing) throw new Error('Image fulfillment job could not enter finalization') |
| 552 | jobInFinalizing = true |
| 553 | lease.release() |
| 554 | |
| 555 | throwIfAborted(args.signal) |
| 556 | await throwIfJobCancelled(args.db, created.job.id) |
| 557 | const adoption = adoptFinalizedImageAssets(originalHtml, finalizationAssets(stagedAssets)) |
| 558 | const validateCandidate = (html: string) => { |
| 559 | const validation = validateFinalizedImageHtml(html, finalizationAssets(stagedAssets)) |
| 560 | const contractErrors = args.validateCandidateHtml?.(html) || [] |
| 561 | return { validation, contractErrors } |
| 562 | } |
| 563 | const deterministicHtml = adoption.html |
| 564 | let candidateHtml = deterministicHtml |
| 565 | candidatePath = `${args.pageHtmlPath}.${created.job.id}.finalizing` |
| 566 | await writeFileAtomically(candidatePath, candidateHtml) |
| 567 | let candidateEvaluation = validateCandidate(candidateHtml) |
| 568 | const deterministicCandidateValid = |
| 569 | adoption.errors.length === 0 && |
| 570 | candidateEvaluation.validation.valid && |
| 571 | candidateEvaluation.validation.unusedSlotIds.length === 0 && |
| 572 | candidateEvaluation.contractErrors.length === 0 |
| 573 | |
| 574 | if (args.refineImageLayout && deterministicCandidateValid) { |
| 575 | // The page agent reads the image-bearing candidate but can only make local edit_file changes. |
| 576 | await writeFileAtomically(args.pageHtmlPath, candidateHtml) |
| 577 | try { |
| 578 | await args.refineImageLayout( |
| 579 | stagedAssets.map((asset) => ({ |
| 580 | slotId: asset.slotId, |
| 581 | layoutSlotId: asset.intent.layout_slot_id, |
| 582 | relativePath: asset.relativePath, |
| 583 | role: asset.intent.role, |
| 584 | prompt: asset.prompt |
| 585 | })) |
| 586 | ) |
| 587 | throwIfAborted(args.signal) |
| 588 | await throwIfJobCancelled(args.db, created.job.id) |
| 589 | const refinedHtml = await fs.promises.readFile(args.pageHtmlPath, 'utf-8') |
| 590 | const refinedEvaluation = validateCandidate(refinedHtml) |
| 591 | const refinedCandidateValid = |
| 592 | refinedEvaluation.validation.valid && |
| 593 | refinedEvaluation.validation.unusedSlotIds.length === 0 && |
| 594 | refinedEvaluation.contractErrors.length === 0 |
| 595 | if (refinedCandidateValid) { |
| 596 | candidateHtml = refinedHtml |
| 597 | candidateEvaluation = refinedEvaluation |
| 598 | await writeFileAtomically(candidatePath, candidateHtml) |
| 599 | } else { |
| 600 | const errors = [ |
| 601 | ...refinedEvaluation.validation.errors, |
| 602 | ...refinedEvaluation.contractErrors |
| 603 | ] |
| 604 | log.warn('[images:fulfillment] refinement rejected; using deterministic candidate', { |
| 605 | sessionId: args.sessionId, |
| 606 | runId: args.runId, |
| 607 | pageId: args.pageId, |
| 608 | jobId: created.job.id, |
| 609 | error: errors.join('; ') || 'Refinement did not retain the generated image layout' |
| 610 | }) |
| 611 | await writeFileAtomically(args.pageHtmlPath, deterministicHtml) |
| 612 | } |
| 613 | } catch (error) { |
| 614 | await throwIfJobCancelled(args.db, created.job.id) |
| 615 | if (isAbortError(error) || args.signal?.aborted) throw error |
| 616 | log.warn('[images:fulfillment] refinement failed; using deterministic candidate', { |
| 617 | sessionId: args.sessionId, |
| 618 | runId: args.runId, |
| 619 | pageId: args.pageId, |
| 620 | jobId: created.job.id, |
| 621 | error: errorMessage(error) |
| 622 | }) |
| 623 | await writeFileAtomically(args.pageHtmlPath, deterministicHtml) |
| 624 | } |
| 625 | } |
| 626 | const { validation, contractErrors } = candidateEvaluation |
| 627 | if ( |
| 628 | adoption.errors.length > 0 || |
| 629 | !validation.valid || |
| 630 | validation.unusedSlotIds.length > 0 || |
| 631 | contractErrors.length > 0 |
| 632 | ) { |
| 633 | await fs.promises.rm(candidatePath, { force: true }).catch(() => undefined) |
| 634 | await fallbackHtml(args.pageHtmlPath, originalHtml) |
| 635 | const error = |
| 636 | [...adoption.errors, ...validation.errors, ...contractErrors].join('; ') || |
| 637 | 'Generated images were not adopted by the final layout' |
| 638 | await Promise.all( |
| 639 | created.intents.map((intent) => |
| 640 | args.db.transitionImageFulfillmentIntent({ |
| 641 | intentId: intent.id, |
| 642 | from: ['generated'], |
| 643 | status: validation.unusedSlotIds.includes(intent.slot_id) |
| 644 | ? 'layout_failed' |
| 645 | : 'fallback', |
| 646 | error |
| 647 | }) |
| 648 | ) |
| 649 | ) |
| 650 | await args.db.transitionImageFulfillmentJob({ |
| 651 | jobId: created.job.id, |
| 652 | from: ['finalizing'], |
| 653 | status: 'degraded', |
| 654 | error |
| 655 | }) |
| 656 | await fs.promises.rm(stagingDir, { recursive: true, force: true }) |
| 657 | log.warn('[images:fulfillment] final layout rejected generated images', { |
| 658 | sessionId: args.sessionId, |
| 659 | runId: args.runId, |
| 660 | pageId: args.pageId, |
| 661 | jobId: created.job.id, |
| 662 | error |
| 663 | }) |
| 664 | return { status: 'degraded', jobId: created.job.id, error } |
| 665 | } |
| 666 | |
| 667 | const commitReservation = await args.coordinator.reserve({ |
| 668 | jobId: `${created.job.id}:commit`, |
| 669 | domain: 'image', |
| 670 | owner: { kind: 'image-fulfillment', id: `${created.job.id}:commit` }, |
| 671 | claims: { write: [imageHistoryLockKey(args.sessionId)] }, |
| 672 | wait: 'block', |
| 673 | signal: args.signal |
| 674 | }) |
| 675 | if (commitReservation.status === 'busy') throw new Error('Image finalization commit is busy') |
| 676 | try { |
| 677 | throwIfAborted(commitReservation.lease.signal) |
| 678 | await throwIfJobCancelled(args.db, created.job.id) |
| 679 | await moveCommittedAssets(stagedAssets) |
| 680 | throwIfAborted(commitReservation.lease.signal) |
| 681 | await throwIfJobCancelled(args.db, created.job.id) |
| 682 | allowLocalAssetRoot(path.join(projectDir, 'images')) |
| 683 | await fs.promises.rename(candidatePath, args.pageHtmlPath) |
| 684 | throwIfAborted(commitReservation.lease.signal) |
| 685 | await throwIfJobCancelled(args.db, created.job.id) |
| 686 | const completed = await args.db.completeImageFulfillmentJob({ |
| 687 | jobId: created.job.id, |
| 688 | sessionId: args.sessionId, |
| 689 | pageId: args.pageId, |
| 690 | modelConfigId: args.imageModelConfigId, |
| 691 | provider: modelConfig.provider, |
| 692 | model: displayModel, |
| 693 | assets: stagedAssets.map((asset) => ({ |
| 694 | intentId: asset.intent.id, |
| 695 | prompt: asset.prompt, |
| 696 | assetPath: asset.relativePath, |
| 697 | mimeType: asset.mimeType, |
| 698 | width: asset.width, |
| 699 | height: asset.height |
| 700 | })) |
| 701 | }) |
| 702 | if (!completed) throw new Error('Image fulfillment was cancelled before completion') |
| 703 | } finally { |
| 704 | commitReservation.lease.release() |
| 705 | } |
| 706 | await fs.promises.rm(stagingDir, { recursive: true, force: true }).catch((cleanupError) => { |
| 707 | // Completion is already durable in SQLite and the page points only at final assets. |
| 708 | // Preserve the private staging directory for startup cleanup instead of undoing the commit. |
| 709 | console.warn('[image:fulfillment] completed job staging cleanup failed', { |
| 710 | jobId: created.job.id, |
| 711 | message: errorMessage(cleanupError) |
| 712 | }) |
| 713 | }) |
| 714 | log.info('[images:fulfillment] completed', { |
| 715 | sessionId: args.sessionId, |
| 716 | runId: args.runId, |
| 717 | pageId: args.pageId, |
| 718 | jobId: created.job.id, |
| 719 | assetCount: stagedAssets.length, |
| 720 | assets: stagedAssets.map((asset) => asset.relativePath) |
| 721 | }) |
| 722 | return { status: 'completed', jobId: created.job.id } |
| 723 | } catch (error) { |
| 724 | const message = errorMessage(error) |
| 725 | const cancelled = isAbortError(error) || args.signal?.aborted === true || lease.signal.aborted |
| 726 | const restoredAssets = await restoreCommittedAssetsToStaging(stagedAssets) |
| 727 | if (candidatePath) await fs.promises.rm(candidatePath, { force: true }).catch(() => undefined) |
| 728 | await fallbackHtml(args.pageHtmlPath, originalHtml) |
| 729 | await transitionAll(args.db, created.intents, cancelled ? 'cancelled' : 'fallback', message) |
| 730 | await args.db.transitionImageFulfillmentJob({ |
| 731 | jobId: created.job.id, |
| 732 | from: jobInFinalizing ? ['finalizing'] : ['pending', 'running'], |
| 733 | status: cancelled ? 'cancelled' : 'degraded', |
| 734 | error: message |
| 735 | }) |
| 736 | if (!jobInFinalizing || restoredAssets) { |
| 737 | await fs.promises.rm(stagingDir, { recursive: true, force: true }).catch(() => undefined) |
| 738 | } |
| 739 | log.warn('[images:fulfillment] failed', { |
| 740 | sessionId: args.sessionId, |
| 741 | runId: args.runId, |
| 742 | pageId: args.pageId, |
| 743 | jobId: created.job.id, |
| 744 | cancelled, |
| 745 | error: message |
| 746 | }) |
| 747 | return { status: cancelled ? 'cancelled' : 'degraded', jobId: created.job.id, error: message } |
| 748 | } finally { |
| 749 | lease.release() |
| 750 | } |
| 751 | } |
| 752 |