navigation_safety_core 0.2.0

Pure Dart core models for navigation safety: alert severity, safety score, threshold config, navigation route, and safety scenario identifiers. No Flutter dependency. Consumed by navigation_safety (th [...]

navigation_safety_core

Pure Dart core models for driving-navigation safety.

SafetyScore, AlertSeverity, NavigationRoute, SafetyScenario, NavigationSafetyConfig — the type vocabulary that navigation_safety wraps with Flutter BLoCs and widgets.

This package exists so that non-Flutter consumers — CLI tools, server-side logic, test fixtures, pure-Dart packages like driving_conditions — can depend on the safety vocabulary without inheriting Flutter + flutter_bloc.

If you're building a Flutter app and want the BLoC layer too, depend on navigation_safety instead; it re-exports everything here for back-compatibility.

What's in here

• SafetyScore — composite score across road-surface, visibility, hazard-density, and route-condition axes.
• AlertSeverity — info / warning / critical. Declaration order is load-bearing (callers compare .index to enforce monotonic alert upgrades; lower severity never replaces higher).
• NavigationRoute — typed route representation independent of any specific routing engine.
• SafetyScenario — enumeration of driving-condition scenarios (clear / wet / icy / heavy-snow / etc.) used by the score computation.
• NavigationSafetyConfig — knobs for safety-overlay behavior (alert thresholds, dismissibility, severity caps).

Pure Dart, no native dependencies, no Flutter.

Install

dependencies:
  navigation_safety_core: ^0.1.0

Use

import 'package:navigation_safety_core/navigation_safety_core.dart';

void main() {
  const config = NavigationSafetyConfig();
  final scenario = SafetyScenario.heavySnow;
  final score = SafetyScore.forScenario(scenario, config: config);

  if (score.severity.index >= AlertSeverity.warning.index) {
    print('Alert: ${score.severity.name} — ${score.advisoryMessage}');
  }
}

License

BSD-3-Clause. See LICENSE.