System Flow

Authentication & token refresh

The frontend axios interceptor automates the refresh: on a 401 (excluding /login, /register, /refresh), it calls /api/refresh, retries the original request once, and on failure clears tokens and redirects to /login.

Reminder lifecycle

A single pengingats row holds multiple daily dose times in its details.jadwal array. Per-schedule send state is tracked in a sent_schedules map inside the same JSONB so each time fires independently.

Forum thread creation + broadcast

The randomized delay (normal distribution, mean 15s σ 5s, floor 4s) avoids WhatsApp gateway rate-limiting.

Caregiver–patient pairing

Relations are self-referential many-to-many through the user_relations table (caregiver_id ↔ patient_id).