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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 | import { createTask } from '../task-manager' import { getImageProvider } from '../image-providers' import { generateAndStoreImage } from '../image-generation' import { imageExists } from '../image-storage' import type { BlogImageGenerateEvent } from './events' import { recordImageGenUsage } from '../ai-usage/helpers' import { AiFeature } from '../ai-usage/features' export { IMAGE_PROVIDERS } from '../image-providers' export interface BlogImageGenerateInput { provider: 'gemini' | 'openai' model: string fallbackProvider?: 'gemini' | 'openai' fallbackModel?: string targets: Array<{ slug: string; prompt: string }> forceRegenerate?: boolean aspectRatio?: string _userId?: string } export interface BlogImageGenerateOutput { generated: number skipped: number failed: number results: Array<{ slug: string status: 'generated' | 'skipped' | 'failed' error?: string usedFallback?: boolean }> } /** * Start a blog hero image generation background task. * * Generates hero images for blog posts using the specified AI provider. * If a fallback provider is configured, automatically retries failed images * with the fallback before counting them as failures. */ export async function startBlogImageGeneration(input: BlogImageGenerateInput): Promise<string> { return createTask<BlogImageGenerateInput, BlogImageGenerateOutput, BlogImageGenerateEvent>( 'blog-image-generate', input, async (handle, config) => { const provider = getImageProvider(config.provider) if (!provider) { handle.fail(`Unknown image provider: ${config.provider}`) return } if (!provider.isAvailable()) { const { envKey, envKeyAlt } = provider.meta const keys = envKeyAlt ? `${envKey} or ${envKeyAlt}` : envKey handle.fail( `No API key configured for ${provider.meta.name}. Set ${keys} in your environment.` ) return } // Validate fallback provider if specified const hasFallback = config.fallbackProvider && config.fallbackModel if (hasFallback) { const fb = getImageProvider(config.fallbackProvider!) if (!fb) { handle.fail(`Unknown fallback provider: ${config.fallbackProvider}`) return } if (!fb.isAvailable()) { const { envKey, envKeyAlt } = fb.meta const keys = envKeyAlt ? `${envKey} or ${envKeyAlt}` : envKey handle.fail( `No API key configured for fallback ${fb.meta.name}. Set ${keys} in your environment.` ) return } } const results: BlogImageGenerateOutput['results'] = [] let generated = 0 let skipped = 0 let failed = 0 let consecutiveErrors = 0 const MAX_CONSECUTIVE_ERRORS = 3 const total = config.targets.length handle.setProgress(0, `Starting generation of ${total} blog image${total === 1 ? '' : 's'}`) for (let i = 0; i < config.targets.length; i++) { if (handle.isCancelled()) break const target = config.targets[i] const storageTarget = { type: 'static' as const, relativePath: `blog/${target.slug}.png` } // Skip if already exists and not force-regenerating if (!config.forceRegenerate && imageExists(storageTarget)) { results.push({ slug: target.slug, status: 'skipped' }) skipped++ const progress = Math.round(((i + 1) / total) * 100) handle.setProgress(progress, `Skipped ${target.slug} (already exists)`) continue } handle.emit({ type: 'image_started', slug: target.slug, model: config.model, provider: config.provider, }) handle.emit({ type: 'batch_progress', completed: generated + skipped + failed, total, currentSlug: target.slug, }) // Try primary provider let succeeded = false let usedFallback = false try { const result = await generateAndStoreImage({ provider: config.provider, model: config.model, prompt: target.prompt, storageTarget, }) generated++ consecutiveErrors = 0 succeeded = true if (config._userId) { recordImageGenUsage(config.provider, config.model, { userId: config._userId, feature: AiFeature.IMAGE_BLOG, backgroundTaskId: handle.id, }) } handle.emit({ type: 'image_complete', slug: target.slug, filePath: result.publicUrl, sizeBytes: result.sizeBytes ?? 0, }) results.push({ slug: target.slug, status: 'generated' }) } catch (primaryErr) { const primaryError = primaryErr instanceof Error ? primaryErr.message : String(primaryErr) // Try fallback if configured if (hasFallback) { handle.emit({ type: 'image_fallback', slug: target.slug, primaryError, fallbackProvider: config.fallbackProvider!, fallbackModel: config.fallbackModel!, }) try { const result = await generateAndStoreImage({ provider: config.fallbackProvider!, model: config.fallbackModel!, prompt: target.prompt, storageTarget, }) generated++ consecutiveErrors = 0 succeeded = true usedFallback = true if (config._userId) { recordImageGenUsage(config.fallbackProvider!, config.fallbackModel!, { userId: config._userId, feature: AiFeature.IMAGE_BLOG, backgroundTaskId: handle.id, }) } handle.emit({ type: 'image_complete', slug: target.slug, filePath: result.publicUrl, sizeBytes: result.sizeBytes ?? 0, usedFallback: true, }) results.push({ slug: target.slug, status: 'generated', usedFallback: true }) } catch (fallbackErr) { // Both primary and fallback failed const fallbackError = fallbackErr instanceof Error ? fallbackErr.message : String(fallbackErr) const combinedError = `Primary (${config.provider}): ${primaryError} | Fallback (${config.fallbackProvider}): ${fallbackError}` failed++ consecutiveErrors++ handle.emit({ type: 'image_error', slug: target.slug, error: combinedError, }) results.push({ slug: target.slug, status: 'failed', error: combinedError }) } } else { // No fallback configured failed++ consecutiveErrors++ handle.emit({ type: 'image_error', slug: target.slug, error: primaryError, }) results.push({ slug: target.slug, status: 'failed', error: primaryError }) } } if (!succeeded && consecutiveErrors >= MAX_CONSECUTIVE_ERRORS) { const lastError = results[results.length - 1]?.error ?? 'Unknown error' handle.fail( `Generation aborted after ${MAX_CONSECUTIVE_ERRORS} consecutive failures: ${lastError}` ) return } const progress = Math.round(((i + 1) / total) * 100) handle.setProgress( progress, `${generated + skipped + failed}/${total} — ${generated} generated${usedFallback ? ' (fallback)' : ''}, ${skipped} skipped, ${failed} failed` ) } handle.emit({ type: 'batch_complete', generated, skipped, failed, }) handle.complete({ generated, skipped, failed, results }) } ) } |