91 lines
2.8 KiB
Dart
91 lines
2.8 KiB
Dart
import 'json_util.dart';
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/// 统计响应（对应后端 StatisticsResponse）
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///
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/// 口径说明：后端的 totalIncome / totalExpense / categoryStatistics 是按
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/// **分类的 type** 判定收支的，而 /bills 列表是按 **账单的 type** 判定。
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/// 两者可能不一致——前端不做交叉校验，汇总/饼图一律以此接口为准。
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class StatisticsResponse {
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final double totalIncome;
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final double totalExpense;
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final double balance;
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final List<CategoryStat> categoryStatistics;
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final List<DailyStat> dailyStatistics;
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const StatisticsResponse({
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required this.totalIncome,
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required this.totalExpense,
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required this.balance,
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required this.categoryStatistics,
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required this.dailyStatistics,
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});
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bool get isEmpty => categoryStatistics.isEmpty && totalIncome == 0 && totalExpense == 0;
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factory StatisticsResponse.fromJson(Map<String, dynamic> json) {
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final income = asDouble(json['totalIncome']);
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final expense = asDouble(json['totalExpense']);
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final balanceRaw = json['balance'];
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return StatisticsResponse(
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totalIncome: income,
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totalExpense: expense,
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// 后端没给 balance 时本地兜底计算
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balance: balanceRaw == null ? income - expense : asDouble(balanceRaw),
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categoryStatistics:
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asMapList(json['categoryStatistics']).map(CategoryStat.fromJson).toList(),
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dailyStatistics:
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asMapList(json['dailyStatistics']).map(DailyStat.fromJson).toList(),
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);
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}
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static const empty = StatisticsResponse(
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totalIncome: 0,
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totalExpense: 0,
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balance: 0,
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categoryStatistics: [],
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dailyStatistics: [],
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);
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}
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/// 分类维度的统计项
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class CategoryStat {
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final int categoryId;
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final String categoryName;
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final String categoryIcon;
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final double amount;
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final int type; // 1=支出 2=收入
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const CategoryStat({
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required this.categoryId,
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required this.categoryName,
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required this.categoryIcon,
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required this.amount,
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required this.type,
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});
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bool get isExpense => type != 2;
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factory CategoryStat.fromJson(Map<String, dynamic> json) => CategoryStat(
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categoryId: asInt(json['categoryId']),
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categoryName: asNonEmpty(json['categoryName'], '未分类'),
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categoryIcon: asNonEmpty(json['categoryIcon'], 'other'),
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amount: asDouble(json['amount']),
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type: asInt(json['type'], fallback: 1) == 2 ? 2 : 1,
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);
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}
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/// 按日趋势项（本期统计页不画折线图，保留以便后续扩展）
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class DailyStat {
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final String date; // yyyy-MM-dd
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final double income;
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final double expense;
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const DailyStat({required this.date, required this.income, required this.expense});
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factory DailyStat.fromJson(Map<String, dynamic> json) => DailyStat(
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date: asString(json['date']),
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income: asDouble(json['income']),
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expense: asDouble(json['expense']),
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);
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}
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