151106aa8e
Local-first Flutter app that identifies the single behavioral change most likely to extend lifespan using hazard-based modeling. Features: - Risk engine with hazard ratios from meta-analyses - 50 countries mapped to 4 mortality groups - 6 modifiable factors: smoking, alcohol, sleep, activity, driving, work hours - SQLite local storage (no cloud, no accounts) - Muted clinical UI theme - 23 unit tests for risk engine Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
90 lines
2.5 KiB
Dart
90 lines
2.5 KiB
Dart
import 'enums.dart';
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class LifespanDelta {
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final int lowMonths;
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final int highMonths;
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final Confidence confidence;
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const LifespanDelta({
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required this.lowMonths,
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required this.highMonths,
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required this.confidence,
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});
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int get midpointMonths => ((lowMonths + highMonths) / 2).round();
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String get rangeDisplay {
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if (lowMonths <= 0 && highMonths <= 0) return '0';
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if (lowMonths == highMonths) return '$lowMonths';
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return '$lowMonths–$highMonths';
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}
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Map<String, dynamic> toJson() => {
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'lowMonths': lowMonths,
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'highMonths': highMonths,
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'confidence': confidence.name,
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};
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factory LifespanDelta.fromJson(Map<String, dynamic> json) => LifespanDelta(
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lowMonths: json['lowMonths'] as int,
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highMonths: json['highMonths'] as int,
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confidence: Confidence.values.byName(json['confidence'] as String),
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);
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}
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class RankedFactor {
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final String behaviorKey;
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final String displayName;
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final LifespanDelta delta;
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const RankedFactor({
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required this.behaviorKey,
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required this.displayName,
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required this.delta,
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});
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Map<String, dynamic> toJson() => {
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'behaviorKey': behaviorKey,
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'displayName': displayName,
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'delta': delta.toJson(),
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};
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factory RankedFactor.fromJson(Map<String, dynamic> json) => RankedFactor(
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behaviorKey: json['behaviorKey'] as String,
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displayName: json['displayName'] as String,
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delta: LifespanDelta.fromJson(json['delta'] as Map<String, dynamic>),
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);
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}
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class CalculationResult {
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final List<RankedFactor> rankedFactors;
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final String modelVersion;
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final DateTime calculatedAt;
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const CalculationResult({
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required this.rankedFactors,
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required this.modelVersion,
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required this.calculatedAt,
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});
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RankedFactor? get dominantFactor =>
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rankedFactors.isNotEmpty ? rankedFactors.first : null;
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RankedFactor? get secondaryFactor =>
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rankedFactors.length > 1 ? rankedFactors[1] : null;
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Map<String, dynamic> toJson() => {
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'rankedFactors': rankedFactors.map((f) => f.toJson()).toList(),
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'modelVersion': modelVersion,
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'calculatedAt': calculatedAt.toIso8601String(),
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};
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factory CalculationResult.fromJson(Map<String, dynamic> json) =>
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CalculationResult(
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rankedFactors: (json['rankedFactors'] as List<dynamic>)
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.map((f) => RankedFactor.fromJson(f as Map<String, dynamic>))
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.toList(),
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modelVersion: json['modelVersion'] as String,
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calculatedAt: DateTime.parse(json['calculatedAt'] as String),
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);
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}
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