46 lines
1.4 KiB
TypeScript
46 lines
1.4 KiB
TypeScript
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/**
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* mediaCache.ts
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*
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* LRU cache and DB-backed caching layer for vision analysis results,
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* including phash-based deduplication and distributed locking.
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*/
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import { LRUCache } from "lru-cache";
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import {
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acquireMediaAnalysisLock,
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deleteCachedMediaAnalysis,
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getCachedMediaAnalysis,
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makeCustomEmojiCacheKey,
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makeImageCacheKey,
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makeStickerCacheKey,
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upsertCachedMediaAnalysis,
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} from "./textCacheStore.js";
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export {
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acquireMediaAnalysisLock,
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deleteCachedMediaAnalysis,
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getCachedMediaAnalysis,
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makeCustomEmojiCacheKey,
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makeImageCacheKey,
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makeStickerCacheKey,
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upsertCachedMediaAnalysis,
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};
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/** Convenience alias for upsertCachedMediaAnalysis. */
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export const setCachedMediaAnalysis = upsertCachedMediaAnalysis;
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/** In-memory LRU cache for vision analysis text results. */
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export const visionLruCache = new LRUCache<string, string>({
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max: 500,
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ttl: 24 * 60 * 60 * 1000,
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});
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/** Deduplicate in-flight vision analysis calls per cache key. */
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export const inFlightVisionCalls = new Map<string, Promise<string>>();
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/**
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* Sentinel value returned when image download or vision analysis fails
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* after exhausting all retries.
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*/
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export const FAILED_ANALYSIS_PREFIX =
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"GAGAL DIANALISIS — gambar tidak dapat diunduh atau vision API gagal setelah 3x percobaan. JANGAN mengasumsikan gambar aman hanya karena gagal dianalisis. Gunakan metadata URL/nama file saja sebagai petunjuk.";
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