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| class RateLimiter {
| constructor() {
| this.records = new Map(); // key -> lastTs
| }
|
| checkLimit(key, intervalMs) {
| const now = Date.now();
| const last = this.records.get(key) || 0;
| const diff = now - last;
| if (diff < intervalMs) {
| return {
| allowed: false,
| waitMs: intervalMs - diff
| };
| }
| this.records.set(key, now);
| return { allowed: true, waitMs: 0 };
| }
|
| getStats() {
| const result = [];
| for (const [key, ts] of this.records.entries()) {
| result.push({ key, lastAt: ts });
| }
| return result;
| }
|
| clear() {
| this.records.clear();
| }
| }
|
| module.exports = RateLimiter;
|
|
