/**
* Purdue Brightspace MCP Server
* Copyright (c) 2026 Rohan Muppa. All rights reserved.
* Licensed under AGPL-3.0 — see LICENSE file for details.
*/
// In-memory TTL cache using Map + setTimeout
// No disk persistence per user decision
interface CacheEntry<T> {
data: T;
timerId: NodeJS.Timeout;
}
export class TTLCache<T = unknown> {
private cache = new Map<string, CacheEntry<T>>();
set(key: string, value: T, ttlMs: number): void {
// Clear existing timer if key exists
const existing = this.cache.get(key);
if (existing) {
clearTimeout(existing.timerId);
}
// Set new timer to auto-delete after TTL
const timerId = setTimeout(() => {
this.cache.delete(key);
}, ttlMs);
// Store entry
this.cache.set(key, { data: value, timerId });
}
get(key: string): T | undefined {
const entry = this.cache.get(key);
return entry?.data;
}
has(key: string): boolean {
return this.cache.has(key);
}
delete(key: string): boolean {
const entry = this.cache.get(key);
if (entry) {
clearTimeout(entry.timerId);
this.cache.delete(key);
return true;
}
return false;
}
clear(): void {
// Clear all timers
for (const entry of this.cache.values()) {
clearTimeout(entry.timerId);
}
// Clear map
this.cache.clear();
}
get size(): number {
return this.cache.size;
}
}
