screentinker/server/package.json
ScreenTinker c71c4016ca feat(email): Microsoft Graph send + alert spam protection + preferences UI
Replaces the unused EMAIL_WEBHOOK_URL stub with a real Microsoft Graph
Mail.Send pipeline via @azure/msal-node client-credentials flow. Prior
state on prod: every alert email was logged to journalctl and never
sent (21 fallback log lines per hour for the chronic-offline devices).

Four coordinated changes shipped as one commit since they're all part
of making email delivery actually work responsibly:

1. services/email.js (NEW): Graph send via plain HTTPS (no SDK), in-memory
   MSAL token cache (refresh 60s pre-expiry), graceful stdout fallback
   when GRAPH_* env vars absent. Drop-in replacement for the old webhook.

2. services/alerts.js refactored: sequential await around sendEmail (was
   parallel fire-and-forget; first run hit Graph's MailboxConcurrency 429
   ApplicationThrottled on a 30-device backlog). Sequential at ~250ms per
   send takes 5-8s for the full backlog, well within the 60s tick. Also:
   24h long-offline cutoff to stop nagging about chronic-offline devices
   (the 20,000+ minute ones); 2-hour dedup window (was 1h) via a generic
   shouldSendAlert(type, id, windowMs) helper that future alert types
   (payment_failed, plan_limit_hit, etc.) can reuse.

3. Preferences UI: single checkbox in settings.js Account section bound
   to users.email_alerts. Saved via the existing Save Profile button. PUT
   /api/auth/me extended to accept email_alerts. requireAuth middleware
   SELECT now includes email_alerts so it propagates via req.user.

4. Dev safety net: GRAPH_DEV_RESTRICT_TO env var as an allow-list. When
   set, only listed recipients reach Graph; everyone else is suppressed
   with a log line. Prevents local dev (which often runs against fresh
   prod DB copies) from accidentally emailing real prod users. UNSET on
   prod systemd unit so production fans out normally.

Also: package.json scripts use --env-file-if-exists=.env so local dev
picks up .env automatically (Node 20.6+ built-in, no dotenv dep). Prod
runs via systemd ExecStart and is unaffected. server/.gitignore added
to keep .env out of git.

Smoke verified end-to-end:
- Sequential send pattern verified (a prior parallel-send tick had hit
  Graph's MailboxConcurrency 429 on 30 simultaneous sends; sequential
  at ~250ms each completes the same backlog without throttling)
- 24h cutoff silenced 20/21 prod devices on the next tick
- Dev restrict suppressed the 1 within-24h send
- User-preference toggle flipped via UI -> DB -> alert path silently
  continued before reaching even the suppression log
2026-05-12 18:16:40 -05:00

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JSON

{
"name": "remote-display-server",
"version": "1.0.0",
"description": "ScreenTinker - Digital Signage Management Server",
"main": "server.js",
"scripts": {
"start": "node --env-file-if-exists=.env server.js",
"dev": "node --watch --env-file-if-exists=.env server.js"
},
"dependencies": {
"@azure/msal-node": "^5.2.1",
"archiver": "^7.0.1",
"bcryptjs": "^3.0.3",
"better-sqlite3": "^9.4.3",
"cors": "^2.8.5",
"express": "^4.18.2",
"express-rate-limit": "^8.3.1",
"google-auth-library": "^10.6.2",
"helmet": "^8.1.0",
"jsonwebtoken": "^9.0.3",
"multer": "^1.4.5-lts.1",
"sharp": "^0.33.2",
"socket.io": "^4.7.2",
"stripe": "^20.4.1",
"unzipper": "^0.12.3",
"uuid": "^14.0.0"
}
}