Expand default_payment_method and default_source fields

Author: solid-maksymtielnyi

lib/src/expanded/subscription_expanded.dart

@@ -1,6 +1,8 @@
 import 'package:stripe/messages.dart';
 import 'package:stripe/src/expanded.dart';
 import 'package:stripe/src/utils/expandable_fields/customer_expandable_field.dart';
+import 'package:stripe/src/utils/expandable_fields/default_payment_method_expandable_field.dart';
+import 'package:stripe/src/utils/expandable_fields/default_source_expandable_field.dart';
 import 'package:stripe/src/utils/expandable_fields/discounts_expandable_field.dart';
 import 'package:stripe/src/utils/expandable_fields/latest_invoice_expanded_expandable_field.dart';
 
@@ -9,12 +11,16 @@ class SubscriptionExpanded {
   final List<Discount>? discounts;
   final InvoiceExpanded? latestInvoice;
   final Customer? customer;
+  final PaymentMethod? defaultPaymentMethod;
+  final Source? defaultSource;
 
   SubscriptionExpanded({
     required this.subscription,
     this.discounts,
     this.latestInvoice,
     this.customer,
+    this.defaultPaymentMethod,
+    this.defaultSource,
   });
 
   factory SubscriptionExpanded.fromJson(
@@ -38,11 +44,24 @@ class SubscriptionExpanded {
       customer = const CustomerExpandableField().extract(json);
     }
 
+    PaymentMethod? defaultPaymentMethod;
+    if (expand.contains(SubscriptionExpandableField.defaultPaymentMethod)) {
+      defaultPaymentMethod =
+          const DefaultPaymentMethodExpandableField().extract(json);
+    }
+
+    Source? defaultSource;
+    if (expand.contains(SubscriptionExpandableField.defaultSource)) {
+      defaultSource = const DefaultSourceExpandableField().extract(json);
+    }
+
     return SubscriptionExpanded(
       subscription: Subscription.fromJson(json),
       discounts: discounts,
       latestInvoice: latestInvoice,
       customer: customer,
+      defaultPaymentMethod: defaultPaymentMethod,
+      defaultSource: defaultSource,
     );
   }
 }

lib/src/messages/enums/expandable_fields/subscription_expandable_field.dart

@@ -2,4 +2,6 @@ enum SubscriptionExpandableField {
   discounts,
   latestInvoice,
   customer,
+  defaultPaymentMethod,
+  defaultSource,
 }

lib/src/resources/subscription.dart

@@ -49,6 +49,10 @@ class SubscriptionResource extends Resource<Subscription> {
           return 'latest_invoice.payment_intent';
         case SubscriptionExpandableField.customer:
           return 'customer';
+        case SubscriptionExpandableField.defaultPaymentMethod:
+          return 'default_payment_method';
+        case SubscriptionExpandableField.defaultSource:
+          return 'default_source';
       }
     }).toList();
   }

lib/src/utils/expandable_fields/default_payment_method_expandable_field.dart

@@ -0,0 +1,20 @@
+import 'package:stripe/messages.dart';
+import 'package:stripe/src/utils/expandable_object_field.dart';
+
+class DefaultPaymentMethodExpandableField
+    extends ExpandableObjectField<PaymentMethod> {
+  @override
+  String get field => 'default_payment_method';
+
+  const DefaultPaymentMethodExpandableField();
+
+  @override
+  PaymentMethod parse(Map<String, dynamic> object) {
+    return PaymentMethod.fromJson(object);
+  }
+
+  @override
+  String replacement(PaymentMethod parsedValue) {
+    return parsedValue.id;
+  }
+}

lib/src/utils/expandable_fields/default_source_expandable_field.dart

@@ -0,0 +1,19 @@
+import 'package:stripe/messages.dart';
+import 'package:stripe/src/utils/expandable_object_field.dart';
+
+class DefaultSourceExpandableField extends ExpandableObjectField<Source> {
+  @override
+  String get field => 'default_source';
+
+  const DefaultSourceExpandableField();
+
+  @override
+  Source parse(Map<String, dynamic> object) {
+    return Source.fromJson(object);
+  }
+
+  @override
+  String replacement(Source parsedValue) {
+    return parsedValue.id;
+  }
+}