[in_app_purchase_android] GooglePlayPurchaseParam add possibility set selected offerToken

packages/in_app_purchase/in_app_purchase_android/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.3.6+14
+
+* GooglePlayPurchaseParam add possibility set selected offerToken
+
 ## 0.3.6+13
 
 * Updates androidx.annotation:annotation to 1.9.1.

packages/in_app_purchase/in_app_purchase_android/lib/src/in_app_purchase_android_platform.dart

@@ -142,13 +142,15 @@ class InAppPurchaseAndroidPlatform extends InAppPurchasePlatform {
   @override
   Future<bool> buyNonConsumable({required PurchaseParam purchaseParam}) async {
     ChangeSubscriptionParam? changeSubscriptionParam;
+    String? offerToken;
 
     if (purchaseParam is GooglePlayPurchaseParam) {
       changeSubscriptionParam = purchaseParam.changeSubscriptionParam;
+      offerToken = purchaseParam.offerToken;
     }
 
-    String? offerToken;
-    if (purchaseParam.productDetails is GooglePlayProductDetails) {
+
+    if (offerToken == null && purchaseParam.productDetails is GooglePlayProductDetails) {
       offerToken =
           (purchaseParam.productDetails as GooglePlayProductDetails).offerToken;
     }

packages/in_app_purchase/in_app_purchase_android/lib/src/types/google_play_purchase_param.dart

@@ -13,9 +13,15 @@ class GooglePlayPurchaseParam extends PurchaseParam {
     required super.productDetails,
     super.applicationUserName,
     this.changeSubscriptionParam,
+    this.offerToken,
   });
 
   /// The 'changeSubscriptionParam' containing information for upgrading or
   /// downgrading an existing subscription.
   final ChangeSubscriptionParam? changeSubscriptionParam;
+
+  /// For One-time product, "offerToken" shouldn't be filled.
+  /// For subscriptions, to get the offer token corresponding to the selected
+  /// offer call productDetails.subscriptionOfferDetails?.get(selectedOfferIndex)?.offerToken
+  final String? offerToken;
 }

packages/in_app_purchase/in_app_purchase_android/pubspec.yaml

@@ -2,7 +2,7 @@ name: in_app_purchase_android
 description: An implementation for the Android platform of the Flutter `in_app_purchase` plugin. This uses the Android BillingClient APIs.
 repository: https://github.com/flutter/packages/tree/main/packages/in_app_purchase/in_app_purchase_android
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+in_app_purchase%22
-version: 0.3.6+13
+version: 0.3.6+14
 
 environment:
   sdk: ^3.5.0

packages/in_app_purchase/in_app_purchase_android/test/in_app_purchase_android_platform_test.dart

@@ -263,6 +263,64 @@ void main() {
   });
 
   group('make payment', () {
+    test('buy non consumable subscribe offer, serializes and deserializes data', () async {
+      const ProductDetailsWrapper productDetails = dummySubscriptionProductDetails;
+      const String accountId = 'hashedAccountId';
+      const String debugMessage = 'dummy message';
+      const BillingResponse sentCode = BillingResponse.ok;
+      const BillingResultWrapper expectedBillingResult = BillingResultWrapper(
+          responseCode: sentCode, debugMessage: debugMessage);
+
+      when(mockApi.launchBillingFlow(any)).thenAnswer((_) async {
+        // Mock java update purchase callback.
+        iapAndroidPlatform.billingClientManager.client.hostCallbackHandler
+            .onPurchasesUpdated(PlatformPurchasesResponse(
+          billingResult: convertToPigeonResult(expectedBillingResult),
+          purchases: <PlatformPurchase>[
+            PlatformPurchase(
+              orderId: 'orderID1',
+              products: <String>[productDetails.productId],
+              isAutoRenewing: false,
+              packageName: 'package',
+              purchaseTime: 1231231231,
+              purchaseToken: 'token',
+              signature: 'sign',
+              originalJson: 'json',
+              developerPayload: 'dummy payload',
+              isAcknowledged: true,
+              purchaseState: PlatformPurchaseState.purchased,
+              quantity: 1,
+            )
+          ],
+        ));
+
+        return convertToPigeonResult(expectedBillingResult);
+      });
+      final Completer<PurchaseDetails> completer = Completer<PurchaseDetails>();
+      PurchaseDetails purchaseDetails;
+      final Stream<List<PurchaseDetails>> purchaseStream =
+          iapAndroidPlatform.purchaseStream;
+      late StreamSubscription<List<PurchaseDetails>> subscription;
+      subscription = purchaseStream.listen((List<PurchaseDetails> details) {
+        purchaseDetails = details.first;
+        completer.complete(purchaseDetails);
+        subscription.cancel();
+      }, onDone: () {});
+      final GooglePlayPurchaseParam purchaseParam = GooglePlayPurchaseParam(
+          offerToken: productDetails.subscriptionOfferDetails?.first.offerIdToken,
+          productDetails:
+          GooglePlayProductDetails.fromProductDetails(productDetails).first,
+          applicationUserName: accountId);
+      final bool launchResult = await iapAndroidPlatform.buyNonConsumable(
+          purchaseParam: purchaseParam);
+
+      final PurchaseDetails result = await completer.future;
+      expect(launchResult, isTrue);
+      expect(result.purchaseID, 'orderID1');
+      expect(result.status, PurchaseStatus.purchased);
+      expect(result.productID, productDetails.productId);
+    });
+
     test('buy non consumable, serializes and deserializes data', () async {
       const ProductDetailsWrapper productDetails = dummyOneTimeProductDetails;
       const String accountId = 'hashedAccountId';