MythEclipseandClaude Opus 4.8
07032ab521
- Split llmModerationClient.ts (2170 lines) into 5 focused sub-modules - Split aiAnalyzer.ts (1282 lines) into 4 modular pipelines - Split messages.db.ts (826 lines) into 5 domain-specific modules - Moved shared schema to @bete/shared, eliminated backend duplication - Added createChildLogger to all voice-recording and AI moderation modules - Extracted tryCommandThenFallback, normalizeMediaState, DEFAULT_VOICE_STATUS - Created shared pagination.ts utility, eliminated 5+ cursor-pagination duplications - Created shared messageMapper.ts for row mapping - Standardized backend error handling with asyncHandler - Added frontend createLogger utility and useAsyncAction hook - Added structured logging to frontend hooks, socket, and API client Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
77 lines
1.6 KiB
TypeScript
77 lines
1.6 KiB
TypeScript
import { createChildLogger } from "@bete/shared/logger";
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const log = createChildLogger("imageMimeSniffer");
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/**
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* Sniff the first bytes of a buffer to determine if it is a supported image
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* format. Returns the canonical MIME type string on success, or null if the
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* bytes are not a recognizable image.
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*/
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export function sniffImageMimeType(buf: Buffer): string | null {
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if (buf.length < 12) return null;
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if (buf[0] === 0xff && buf[1] === 0xd8 && buf[2] === 0xff) {
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return "image/jpeg";
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}
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if (
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buf[0] === 0x89 &&
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buf[1] === 0x50 &&
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buf[2] === 0x4e &&
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buf[3] === 0x47 &&
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buf[4] === 0x0d &&
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buf[5] === 0x0a &&
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buf[6] === 0x1a &&
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buf[7] === 0x0a
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) {
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return "image/png";
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}
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if (
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buf[0] === 0x47 &&
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buf[1] === 0x49 &&
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buf[2] === 0x46 &&
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buf[3] === 0x38
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) {
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return "image/gif";
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}
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if (
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buf[0] === 0x52 &&
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buf[1] === 0x49 &&
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buf[2] === 0x46 &&
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buf[3] === 0x46 &&
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buf[8] === 0x57 &&
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buf[9] === 0x45 &&
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buf[10] === 0x42 &&
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buf[11] === 0x50
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) {
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return "image/webp";
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}
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if (
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buf.length >= 12 &&
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buf[4] === 0x66 &&
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buf[5] === 0x74 &&
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buf[6] === 0x79 &&
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buf[7] === 0x70
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) {
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const brand = buf.subarray(8, 12).toString("ascii");
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if (brand.startsWith("avif") || brand.startsWith("avis")) {
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return "image/avif";
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}
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if (
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brand.startsWith("mif1") ||
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brand.startsWith("heic") ||
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brand.startsWith("heis")
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) {
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return "image/heic";
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}
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}
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return null;
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}
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// Keep log referenced so TS does not tree-shake the logger init
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log.debug("imageMimeSniffer loaded");
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