ghostguild-org/server/utils/rateLimit.js
Jennie Robinson Faber 51230e5151 refactor(launch): simplify launch-readiness fixes
Follow-up to 208638e. Code review surfaced a few real issues; this
commit addresses them.

- login.post.js now uses the new sendMagicLink util instead of
  duplicating the jti/jwt/Resend/logActivity logic. Reduces 60 lines.
- sendMagicLink accepts an optional pre-loaded Member doc, skipping
  the redundant findOne when the caller already has one. customer.post.js
  passes the just-created/upgraded member, dropping signup from 3
  Mongo round-trips to 1 (lookup is gone; jti burn remains).
- sendMagicLink now lowercases the email defensively so callers don't
  have to remember.
- rateLimit.js: replaced an effectively-dead eviction line with a
  probabilistic sweep (~1% of calls scan and evict keys whose newest
  entry has aged out). Caps unbounded Map growth under random-key
  spraying.
- reconcile-payments.post.js: 401/403/404 from Helcim now bails out
  immediately instead of burning all 3 retry attempts; dry-run
  summary filters via the same RECONCILABLE_STATUSES set as apply
  mode so counts match.
- Deleted WHAT-comments and section banners per CLAUDE.md no-comment
  rule. Kept genuine WHY-comments (validateBeforeSave rationale,
  amount-IGNORED-for-tickets, sendConfirmation deliberately-omitted).

Tests: 758/760 passing (unchanged).
2026-04-25 19:34:16 +01:00

31 lines
930 B
JavaScript

// Tiny in-memory sliding-window rate limiter.
// Acceptable for single-instance Nitro on Netlify; swap to Mongo/Upstash if
// we move to multi-instance.
const buckets = new Map()
export function rateLimit(key, { max, windowMs }) {
const now = Date.now()
// Probabilistic sweep: ~1% of calls evict keys whose newest entry has fully
// aged out, so the Map doesn't grow unbounded under random-key spraying.
if (Math.random() < 0.01) {
for (const [k, arr] of buckets) {
const last = arr[arr.length - 1]
if (last === undefined || now - last >= windowMs) buckets.delete(k)
}
}
const arr = (buckets.get(key) || []).filter((t) => now - t < windowMs)
if (arr.length >= max) {
buckets.set(key, arr)
return false
}
arr.push(now)
buckets.set(key, arr)
return true
}
// Test helper — clears all buckets so each test starts clean.
export function resetRateLimit() {
buckets.clear()
}