fix: rate limit error and lyrics not found error returned as 422

Author: Maikuh

src/index.ts

@@ -49,10 +49,12 @@ const app = new Elysia()
 		rateLimit({
 			max: 15,
 			duration: 60_000,
-			errorResponse: JSON.stringify({
-				status: 'error',
-				error: { message: 'Too many requests', timestamp: timestamp() },
-			}),
+			errorResponse: new Response(
+				JSON.stringify({
+					error: { message: 'Too many requests', timestamp: timestamp() },
+				}),
+				{ status: 429, headers: { 'Content-Type': 'application/json' } },
+			),
 		}),
 	)
 	.onError(({ code, error, set }) => {

src/routes/lyrics.ts

@@ -61,6 +61,11 @@ async function handleLyricsRequest(query: LyricsQuery, request: Request): Promis
 		return jsonError('Failed to fetch lyrics', 500, String(e))
 	}
 
+	if (result.status === 'error') {
+		const msg = (result.error as Record<string, unknown>)?.message
+		return jsonError(typeof msg === 'string' ? msg : 'No lyrics found', 404)
+	}
+
 	const data = result.data as Record<string, unknown> | undefined
 	if (data?.lyrics) saveToCache(cacheKey, result)