feat:额外收费

lib/common/services/database/entity/user_entity.dart

@@ -1,9 +1,62 @@
+import 'package:common_utils/common_utils.dart';
 import 'package:equatable/equatable.dart';
 import 'package:floor/floor.dart';
 import 'package:json_annotation/json_annotation.dart';
+import 'package:pj_supermarket_cloud/common/index.dart';
+import 'package:pj_supermarket_cloud/common/models/index.dart';
 
 part 'user_entity.g.dart';
 
+// 优惠
+@JsonSerializable()
+class DiscountsItem {
+  /// 优惠活动名称
+  String name;
+
+  /// 用餐时间段类型
+  @JsonKey(
+    fromJson: JsonTool.stringToProductHourType,
+    toJson: JsonTool.productHourTypeToString,
+  )
+  ProductHourType? hourType;
+
+  /// 优惠类型
+  @JsonKey(
+    fromJson: JsonTool.stringToDiscountsType,
+    toJson: JsonTool.discountsTypeToString,
+  )
+  DiscountsType? type;
+
+  /// 基础金额(分),超过了这个基数`extraPer`就生效
+  int basePrice;
+
+  /// 打折(8折->0.8)
+  double? extraPer;
+
+  DiscountsItem({
+    required this.name,
+    required this.hourType,
+    required this.type,
+    required this.basePrice,
+    required this.extraPer,
+  });
+
+  /// 计算优惠后的价格
+  /// [totalPrice] 总金额(分)
+  /// [return] 优惠的价格(分)
+  int computedDiscountsExtraPrice(int totalPrice) {
+    if (totalPrice <= basePrice) return 0;
+    final rate = extraPer ?? 1.0;
+    if (rate == 1.0) return 0;
+    return (totalPrice * (rate - 1)).round();
+  }
+
+  factory DiscountsItem.fromJson(Map<String, dynamic> json) =>
+      _$DiscountsItemFromJson(json);
+
+  Map<String, dynamic> toJson() => _$DiscountsItemToJson(this);
+}
+
 @JsonSerializable()
 @Entity(tableName: "user_record")
 class UserEntity extends Equatable {
@@ -38,6 +91,12 @@ class UserEntity extends Equatable {
   /// 用户所属的商户id(主要用于机器的离线模式)
   String? canteenId;
 
+  /// 优惠活动
+  List<DiscountsItem>? discountsList;
+
+  /// 优惠活动更新时间
+  DateTime? discountsUpdateTime;
+
   /// 创建时间
   DateTime? createTime;
 
@@ -59,6 +118,28 @@ class UserEntity extends Equatable {
     this.updateTime,
   });
 
+  /// 计算优惠后的价格
+  /// [totalPrice] 总金额(分)
+  /// [return] 优惠的价格(分)
+  int computedDiscountsPrice(int totalPrice) {
+    if (ObjectUtil.isEmpty(discountsList)) {
+      return 0;
+    }
+    var discountsPrice = 0;
+    for (final item in discountsList!) {
+      discountsPrice += item.computedDiscountsExtraPrice(totalPrice);
+    }
+    return discountsPrice;
+  }
+
+  /// 根据`discountsUpdateTime`来计算,最小更新时间30s
+  bool isUpdateDiscounts() {
+    if (ObjectUtil.isEmpty(discountsUpdateTime)) {
+      return true;
+    }
+    return DateTime.now().difference(discountsUpdateTime!).inSeconds > 30;
+  }
+
   factory UserEntity.fromJson(Map<String, dynamic> json) =>
       _$UserEntityFromJson(json);
 

lib/common/services/database/entity/user_entity.g.dart

@@ -6,6 +6,24 @@ part of 'user_entity.dart';
 // JsonSerializableGenerator
 // **************************************************************************
 
+DiscountsItem _$DiscountsItemFromJson(Map<String, dynamic> json) =>
+    DiscountsItem(
+      name: json['name'] as String,
+      hourType: JsonTool.stringToProductHourType(json['hourType'] as String?),
+      type: JsonTool.stringToDiscountsType(json['type'] as String?),
+      basePrice: (json['basePrice'] as num).toInt(),
+      extraPer: (json['extraPer'] as num?)?.toDouble(),
+    );
+
+Map<String, dynamic> _$DiscountsItemToJson(DiscountsItem instance) =>
+    <String, dynamic>{
+      'name': instance.name,
+      'hourType': JsonTool.productHourTypeToString(instance.hourType),
+      'type': JsonTool.discountsTypeToString(instance.type),
+      'basePrice': instance.basePrice,
+      'extraPer': instance.extraPer,
+    };
+
 UserEntity _$UserEntityFromJson(Map<String, dynamic> json) => UserEntity(
       id: (json['id'] as num?)?.toInt(),
       userId: json['userId'] as String,
@@ -23,7 +41,13 @@ UserEntity _$UserEntityFromJson(Map<String, dynamic> json) => UserEntity(
       updateTime: json['updateTime'] == null
           ? null
           : DateTime.parse(json['updateTime'] as String),
-    );
+    )
+      ..discountsList = (json['discountsList'] as List<dynamic>?)
+          ?.map((e) => DiscountsItem.fromJson(e as Map<String, dynamic>))
+          .toList()
+      ..discountsUpdateTime = json['discountsUpdateTime'] == null
+          ? null
+          : DateTime.parse(json['discountsUpdateTime'] as String);
 
 Map<String, dynamic> _$UserEntityToJson(UserEntity instance) =>
     <String, dynamic>{
@@ -37,6 +61,8 @@ Map<String, dynamic> _$UserEntityToJson(UserEntity instance) =>
       'walletTypeId': instance.walletTypeId,
       'walletBalance': instance.walletBalance,
       'canteenId': instance.canteenId,
+      'discountsList': instance.discountsList,
+      'discountsUpdateTime': instance.discountsUpdateTime?.toIso8601String(),
       'createTime': instance.createTime?.toIso8601String(),
       'updateTime': instance.updateTime?.toIso8601String(),
     };