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feat(04-01): add timestamp to ProcessedGpsData and precision/lifecycle constants

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- Add timestamp field to ProcessedGpsData with copyWith support
- Add precision switching thresholds: 3.33 m/s (12 km/h) up, 2.22 m/s (8 km/h) down
- Add PRECISION_SWITCH_FIRST_FIX_DELAY (5s) to prevent early switching
- Add BACKGROUND_GRACE_PERIOD (7s) for lifecycle-aware GPS management
- Mark GPS_GRACE_PERIOD as deprecated in favor of BACKGROUND_GRACE_PERIOD
- Change GpsService.positionStream to createPositionStream() with dynamic accuracy
- Keep deprecated positionStream getter for backward compatibility

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Mikkeli Matlock
2026-02-12 09:00:10 +09:00
parent 40c74677be
commit c4d4032b6b
4 changed files with 29 additions and 3 deletions
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lib/config/gps_constants.dart
+9
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@@ -19,4 +19,13 @@ abstract class GpsConfig {
/// Speed threshold below which heading is considered unreliable (m/s)
static const double LOW_SPEED_THRESHOLD = 1.0;
/// Speed threshold for switching to HIGH precision (m/s) - 12 km/h
static const double PRECISION_UP_THRESHOLD_MPS = 3.33;
/// Speed threshold for switching to BALANCED precision (m/s) - 8 km/h
static const double PRECISION_DOWN_THRESHOLD_MPS = 2.22;
/// Minimum time after first fix before precision switching starts
static const Duration PRECISION_SWITCH_FIRST_FIX_DELAY = Duration(seconds: 5);
}