// Generic in-memory cache utility for plug-and-play usage
export class SimpleCache<T = any> {
private cache: Map<string, T> = new Map();
private ttl: number; // ms
private timers: Map<string, NodeJS.Timeout> = new Map();
constructor(ttl: number = 5 * 60 * 1000) { // default 5 min
this.ttl = ttl;
}
get(key: string): T | undefined {
return this.cache.get(key);
}
set(key: string, value: T): void {
this.cache.set(key, value);
if (this.timers.has(key)) {
clearTimeout(this.timers.get(key)!);
}
const timer = setTimeout(() => {
this.cache.delete(key);
this.timers.delete(key);
}, this.ttl);
this.timers.set(key, timer);
}
has(key: string): boolean {
return this.cache.has(key);
}
clear(): void {
this.cache.clear();
this.timers.forEach(timer => clearTimeout(timer));
this.timers.clear();
}
}
