import NodeCache from 'node-cache';
import { config } from '../config/env.js';
// Create cache instance
// TTL is set from environment (default 300 seconds = 5 minutes)
export const cache = new NodeCache({
stdTTL: config.cache.ttlSeconds,
checkperiod: 60, // Check for expired keys every 60 seconds
useClones: false, // Don't clone objects (faster)
});
// Helper function to get or set cache
export async function getCached<T>(
key: string,
fetcher: () => Promise<T>,
ttl?: number
): Promise<T> {
// Try to get from cache
const cached = cache.get<T>(key);
if (cached !== undefined) {
return cached;
}
// Not in cache, fetch it
const value = await fetcher();
// Store in cache (with TTL if provided, otherwise use default)
if (ttl !== undefined) {
cache.set(key, value, ttl);
} else {
cache.set(key, value);
}
return value;
}
// Helper to invalidate cache
export function invalidateCache(key: string): void {
cache.del(key);
}
// Helper to clear all cache
export function clearCache(): void {
cache.flushAll();
}
