429 lines
12 KiB
Dart
429 lines
12 KiB
Dart
import 'json_util.dart';
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/// 「强宝健康」模块的数据模型。
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///
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/// 后端接口一律给 kcal（换算在服务端做掉了），所以这里不会再出现千焦 ——
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/// 前端只有一个能量口径。
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// ==================================================================
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// 体重
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// ==================================================================
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/// 一个体重数据点（折线图用）
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class WeightPoint {
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const WeightPoint({required this.date, required this.weight});
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final DateTime date;
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final double weight;
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factory WeightPoint.fromJson(Map<String, dynamic> json) {
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return WeightPoint(
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date: tryParse(json['date']) ?? DateTime.now(),
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weight: asDouble(json['weight']),
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);
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}
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static DateTime? tryParse(Object? value) {
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final text = asString(value).trim();
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if (text.isEmpty) return null;
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return DateTime.tryParse(text);
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}
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}
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/// 体重折线图数据
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class WeightChart {
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const WeightChart({
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required this.points,
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required this.currentWeight,
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required this.delta,
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required this.maxWeight,
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required this.minWeight,
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});
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final List<WeightPoint> points;
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/// 最近一次体重，没记过就是 null
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final double? currentWeight;
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/// 与上一次记录的差值。正数 = 涨了。只有一个点时是 null。
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final double? delta;
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/// Y 轴范围（后端已把目标体重也算进来，避免理想线画在可见区外）
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final double? maxWeight;
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final double? minWeight;
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static const empty = WeightChart(
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points: [],
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currentWeight: null,
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delta: null,
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maxWeight: null,
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minWeight: null,
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);
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bool get hasData => points.isNotEmpty;
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factory WeightChart.fromJson(Map<String, dynamic> json) {
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return WeightChart(
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points: asMapList(json['points']).map(WeightPoint.fromJson).toList(),
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currentWeight: asNullableDouble(json['currentWeight']),
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delta: asNullableDouble(json['delta']),
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maxWeight: asNullableDouble(json['maxWeight']),
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minWeight: asNullableDouble(json['minWeight']),
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);
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}
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}
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/// 一条体重记录（历史列表用）
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class WeightRecordItem {
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const WeightRecordItem({
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required this.id,
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required this.date,
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required this.weight,
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required this.note,
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});
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final int id;
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final DateTime? date;
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final double weight;
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final String note;
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factory WeightRecordItem.fromJson(Map<String, dynamic> json) {
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return WeightRecordItem(
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id: asInt(json['id']),
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date: WeightPoint.tryParse(json['recordDate']),
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weight: asDouble(json['weight']),
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note: asString(json['note']),
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);
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}
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}
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// ==================================================================
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// 减重目标
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// ==================================================================
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/// 减重目标 + 由它推出来的一整套「每周该减多少」
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class WeightGoal {
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const WeightGoal({
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required this.hasGoal,
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required this.startWeight,
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required this.targetWeight,
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required this.startDate,
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required this.targetDate,
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required this.totalWeeks,
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required this.weeklyLoss,
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required this.weeklyLossUnhealthy,
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required this.idealCurve,
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required this.currentWeight,
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required this.lostWeight,
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required this.remainWeight,
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required this.weightProgress,
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required this.timeProgress,
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required this.id,
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});
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final bool hasGoal;
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final int? id;
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final double startWeight;
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final double targetWeight;
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final DateTime? startDate;
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final DateTime? targetDate;
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/// 总周数（后端向上取整）
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final int totalWeeks;
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/// 每周应减 kg
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final double weeklyLoss;
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/// 每周超过 1kg，界面上要提示「掉太快」
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final bool weeklyLossUnhealthy;
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/// 理想体重曲线（每周一个点），画在体重折线图上当参照
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final List<WeightPoint> idealCurve;
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final double? currentWeight;
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/// 已减 / 还差。没记过体重时是 null。
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final double? lostWeight;
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final double? remainWeight;
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/// 0.0 ~ 1.0
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final double weightProgress;
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final double timeProgress;
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static const none = WeightGoal(
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hasGoal: false,
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startWeight: 0,
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targetWeight: 0,
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startDate: null,
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targetDate: null,
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totalWeeks: 0,
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weeklyLoss: 0,
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weeklyLossUnhealthy: false,
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idealCurve: [],
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currentWeight: null,
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lostWeight: null,
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remainWeight: null,
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weightProgress: 0,
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timeProgress: 0,
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id: null,
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);
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factory WeightGoal.fromJson(Map<String, dynamic> json) {
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if (json['hasGoal'] != true) return none;
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return WeightGoal(
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hasGoal: true,
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id: asNullableInt(json['id']),
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startWeight: asDouble(json['startWeight']),
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targetWeight: asDouble(json['targetWeight']),
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startDate: WeightPoint.tryParse(json['startDate']),
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targetDate: WeightPoint.tryParse(json['targetDate']),
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totalWeeks: asInt(json['totalWeeks']),
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weeklyLoss: asDouble(json['weeklyLoss']),
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weeklyLossUnhealthy: json['weeklyLossUnhealthy'] == true,
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idealCurve:
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asMapList(json['idealCurve']).map(WeightPoint.fromJson).toList(),
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currentWeight: asNullableDouble(json['currentWeight']),
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lostWeight: asNullableDouble(json['lostWeight']),
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remainWeight: asNullableDouble(json['remainWeight']),
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weightProgress: asDouble(json['weightProgress']),
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timeProgress: asDouble(json['timeProgress']),
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);
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}
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}
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// ==================================================================
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// 食物 + 饮食
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// ==================================================================
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/// 一个份量档位，如「一碗 150g」
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class FoodPortion {
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const FoodPortion({required this.label, required this.grams});
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final String label;
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final int grams;
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factory FoodPortion.fromJson(Map<String, dynamic> json) {
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return FoodPortion(
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label: asString(json['label']),
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grams: asInt(json['grams']),
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);
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}
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}
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/// 一条食物（营养值都是「每 100g」）
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class FoodItem {
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const FoodItem({
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required this.id,
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required this.name,
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required this.alias,
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required this.categoryName,
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required this.subCategoryName,
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required this.ediblePercent,
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required this.energyKcal,
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required this.protein,
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required this.fat,
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required this.carbohydrate,
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required this.dietaryFiber,
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required this.sodium,
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required this.portions,
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});
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final int id;
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final String name;
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final String alias;
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final String categoryName;
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final String subCategoryName;
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/// 食部 %。展示用参考，不参与热量换算。
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final double? ediblePercent;
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/// 每 100g 的能量 kcal（后端已经把 kJ 换掉了）
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final double? energyKcal;
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final double? protein;
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final double? fat;
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final double? carbohydrate;
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final double? dietaryFiber;
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final double? sodium;
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/// 份量档位。后端保证非空。
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final List<FoodPortion> portions;
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factory FoodItem.fromJson(Map<String, dynamic> json) {
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return FoodItem(
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id: asInt(json['id']),
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name: asNonEmpty(json['name'], '未命名食物'),
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alias: asString(json['alias']),
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categoryName: asString(json['categoryName']),
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subCategoryName: asString(json['subCategoryName']),
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ediblePercent: asNullableDouble(json['ediblePercent']),
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energyKcal: asNullableDouble(json['energyKcal']),
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protein: asNullableDouble(json['protein']),
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fat: asNullableDouble(json['fat']),
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carbohydrate: asNullableDouble(json['carbohydrate']),
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dietaryFiber: asNullableDouble(json['dietaryFiber']),
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sodium: asNullableDouble(json['sodium']),
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portions:
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asMapList(json['portions']).map(FoodPortion.fromJson).toList(),
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);
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}
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/// 按份量算这条食物实际摄入的热量（前端预览用，服务端会独立再算一次）
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double kcalFor(num grams) {
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if (energyKcal == null || grams <= 0) return 0;
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return energyKcal! * grams / 100;
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}
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}
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/// 食物分类 + 该分类下的食物数
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class FoodCategory {
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const FoodCategory({required this.name, required this.count});
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final String name;
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final int count;
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factory FoodCategory.fromJson(Map<String, dynamic> json) {
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return FoodCategory(
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name: asNonEmpty(json['name'], '未分类'),
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count: asInt(json['count']),
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);
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}
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}
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/// 一条饮食记录
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class DietRecordItem {
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const DietRecordItem({
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required this.id,
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required this.mealType,
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required this.foodName,
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required this.amountGrams,
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required this.energyKcal,
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required this.protein,
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required this.fat,
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required this.carbohydrate,
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required this.dietaryFiber,
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required this.sodium,
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});
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final int id;
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final String mealType;
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final String foodName;
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final double amountGrams;
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final double energyKcal;
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final double protein;
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final double fat;
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final double carbohydrate;
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final double dietaryFiber;
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final double sodium;
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factory DietRecordItem.fromJson(Map<String, dynamic> json) {
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return DietRecordItem(
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id: asInt(json['id']),
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mealType: asNonEmpty(json['mealType'], 'snack'),
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foodName: asNonEmpty(json['foodName'], '未命名食物'),
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amountGrams: asDouble(json['amountGrams']),
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energyKcal: asDouble(json['energyKcal']),
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protein: asDouble(json['protein']),
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fat: asDouble(json['fat']),
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carbohydrate: asDouble(json['carbohydrate']),
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dietaryFiber: asDouble(json['dietaryFiber']),
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sodium: asDouble(json['sodium']),
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);
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}
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}
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/// 营养合计
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class NutritionTotals {
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const NutritionTotals({
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this.energyKcal = 0,
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this.protein = 0,
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this.fat = 0,
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this.carbohydrate = 0,
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this.dietaryFiber = 0,
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this.sodium = 0,
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this.itemCount = 0,
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});
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final double energyKcal;
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final double protein;
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final double fat;
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final double carbohydrate;
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final double dietaryFiber;
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final double sodium;
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final int itemCount;
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static const zero = NutritionTotals();
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factory NutritionTotals.fromJson(Map<String, dynamic> json) {
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return NutritionTotals(
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energyKcal: asDouble(json['energyKcal']),
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protein: asDouble(json['protein']),
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fat: asDouble(json['fat']),
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carbohydrate: asDouble(json['carbohydrate']),
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dietaryFiber: asDouble(json['dietaryFiber']),
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sodium: asDouble(json['sodium']),
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itemCount: asInt(json['itemCount']),
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);
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}
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}
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/// 一个餐次的分组
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class MealGroup {
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const MealGroup({
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required this.mealType,
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required this.totals,
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required this.items,
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});
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final String mealType;
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final NutritionTotals totals;
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final List<DietRecordItem> items;
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factory MealGroup.fromJson(Map<String, dynamic> json) {
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return MealGroup(
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mealType: asNonEmpty(json['mealType'], 'snack'),
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totals: NutritionTotals.fromJson(
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(json['totals'] as Map?)?.cast<String, dynamic>() ?? const {}),
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items: asMapList(json['items']).map(DietRecordItem.fromJson).toList(),
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);
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}
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}
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/// 某一天的饮食情况
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class DietDay {
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const DietDay({
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required this.date,
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required this.totals,
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required this.meals,
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});
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final DateTime? date;
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final NutritionTotals totals;
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/// 固定 4 个餐次（后端保留了空餐次，前端不用补位）
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final List<MealGroup> meals;
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static const empty = DietDay(date: null, totals: NutritionTotals.zero, meals: []);
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factory DietDay.fromJson(Map<String, dynamic> json) {
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return DietDay(
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date: WeightPoint.tryParse(json['date']),
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totals: NutritionTotals.fromJson(
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(json['totals'] as Map?)?.cast<String, dynamic>() ?? const {}),
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meals: asMapList(json['meals']).map(MealGroup.fromJson).toList(),
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);
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}
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}
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/// 餐次的中文名与显示顺序
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const Map<String, String> kMealLabels = {
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'breakfast': '早餐',
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'lunch': '午餐',
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'dinner': '晚餐',
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'snack': '加餐',
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};
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String mealLabel(String mealType) => kMealLabels[mealType] ?? '加餐';
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