import { CACHE_TTL_MS } from "../constants.js";
interface CacheEntry<T> {
value: T;
expiresAt: number;
}
class MemoryCache<T> {
private cache = new Map<string, CacheEntry<T>>();
private cleanupInterval: ReturnType<typeof setInterval>;
constructor() {
this.cleanupInterval = setInterval(() => this.cleanup(), CACHE_TTL_MS);
}
private cleanup(): void {
const now = Date.now();
for (const [key, entry] of this.cache.entries()) {
if (entry.expiresAt < now) {
this.cache.delete(key);
}
}
}
get(key: string): T | undefined {
const entry = this.cache.get(key);
if (!entry) return undefined;
if (entry.expiresAt < Date.now()) {
this.cache.delete(key);
return undefined;
}
return entry.value;
}
set(key: string, value: T): void {
this.cache.set(key, {
value,
expiresAt: Date.now() + CACHE_TTL_MS
});
}
has(key: string): boolean {
const entry = this.cache.get(key);
if (!entry) return false;
if (entry.expiresAt < Date.now()) {
this.cache.delete(key);
return false;
}
return true;
}
delete(key: string): boolean {
return this.cache.delete(key);
}
clear(): void {
this.cache.clear();
}
destroy(): void {
clearInterval(this.cleanupInterval);
this.cache.clear();
}
}
export const searchCache = new MemoryCache<unknown>();
export const fetchCache = new MemoryCache<unknown>();
export function createCacheKey(prefix: string, ...parts: (string | number)[]): string {
return `${prefix}:${parts.join(":")}`;
}
