backup. before shop update

lib/models/coupon.dart

@@ -0,0 +1,41 @@
+
+import 'dart:convert';
+
+import 'business.dart';
+
+class Coupon {
+  int id;
+  String code;
+  String description;
+  String expirationDate;
+  double minAmount;
+  Business store;
+  double valueAmount;
+  bool isPercentage;
+
+  Coupon.fromJson(Map<String, dynamic> json)
+    : id = json['id'],
+      code = json['code'].toString(),
+      description = json['description'],
+      expirationDate = json['expiration_date'],
+      minAmount = double.parse(json['min_amount'].toString()),
+      store = json['store'] != null ? Business.fromJson(json['store']) : null,
+      valueAmount = double.parse(json['value_amount'].toString()),
+      isPercentage = json['is_percentage'];
+
+  Map<String, dynamic> toJson() => {
+    'id': id,
+    'code': code,
+    'description': description,
+    'expiration_date': expirationDate,
+    'min_amount': minAmount,
+    'store': store,
+    'value_amount': valueAmount,
+    'is_percentage': isPercentage,
+  };
+
+  @override
+  String toString() {
+    return json.encode(this);
+  }
+}