Editing Openai/691a5ca1-2b1c-8010-8cbd-8797f95aa8d9 (section)

==== 4. How I’d wire motion + GPS + notifications + Live Activity together ====

High-level flow:

===== A. On “Start driving” =====
* Persist a new DrivingSession with startDate.
* CLLocationManager: - activityType = .automotiveNavigation (or appropriate) - allowsBackgroundLocationUpdates = true - Reasonable desiredAccuracy / distanceFilter.
* CMMotionActivityManager: - Start activity updates to refine “driving vs stopped”.
* UNUserNotificationCenter: - Schedule a 4h local notification from “now” as a baseline. - Optionally schedule a 3h30 “pre-break” reminder.
* ActivityKit: - Start a Live Activity with: - elapsed at 0 - targetBreakTime = now + 4h - optional fields: distance, average speed.

===== B. While session is running =====

Your engine (actor / object) receives:
* Motion updates → determine “currently driving or not”
* Location updates → compute: - distance - speed - optionally use timestamp deltas for more accurate time accounting.

The engine:
* Maintains driving seconds (don’t rely on a timer; use timestamps).
* Whenever state changes enough (e.g. every 30s or significant change), it: - Updates Live Activity with the latest stats. - Optionally adjusts the planned notification fire time if your logic changes - But you can also keep it simple and just fire at exactly 4h from when they tapped Start.

===== C. On “Stop driving” =====
* Close the session (store endDate, total time, distance, etc.).
* Cancel any future driving-specific notifications (if desired).
* End Live Activity.