car-interface-android/lib/data/models/obd_state.dart

/// Latest values read from the ELM327 adapter.
class ObdState {
  const ObdState({
    this.connected = false,
    this.connecting = false,
    this.speedKmh,
    this.throttlePercent,
    this.mafGramsPerSecond,
    this.fuelRateLph,
    this.ambientCelsius,
    this.error,
    this.updatedAt = 0,
    this.retryExhausted = false,
  });

  final bool connected;
  final bool connecting;
  final double? speedKmh;
  final double? throttlePercent;
  final double? mafGramsPerSecond;

  /// ECU-reported engine fuel rate (PID `5E`), when the vehicle supports it.
  final double? fuelRateLph;
  final double? ambientCelsius;
  final String? error;
  final int updatedAt;

  /// The native worker stopped retrying after repeated connection failures.
  final bool retryExhausted;

  bool get hasVehicleData =>
      connected && (speedKmh != null || throttlePercent != null);

  bool get hasTemperature => connected && ambientCelsius != null;

  factory ObdState.fromMap(Map<dynamic, dynamic> map) {
    double? number(String key) => (map[key] as num?)?.toDouble();
    return ObdState(
      connected: map['connected'] == true,
      connecting: map['connecting'] == true,
      speedKmh: number('speedKmh'),
      throttlePercent: number('throttle'),
      mafGramsPerSecond: number('maf'),
      fuelRateLph: number('fuelRateLph'),
      ambientCelsius: number('ambient'),
      error: map['error'] as String?,
      updatedAt: (map['updatedAt'] as num?)?.toInt() ?? 0,
      retryExhausted: map['retryExhausted'] == true,
    );
  }
}