feat(iap): remove_ads purchase/restore service + adsRemoved notifier

2026-06-13 13:55:44 +09:00
parent e43fda8551
commit 6d2ffebb92
4 changed files with 116 additions and 0 deletions
@@ -0,0 +1,73 @@
+import 'dart:async';
+
+import 'package:flutter/foundation.dart';
+import 'package:in_app_purchase/in_app_purchase.dart';
+
+import 'ad_config.dart';
+
+/// Wraps the non-consumable `remove_ads` purchase. On any verified purchase
+/// or restore of the product it invokes [onEntitlementGranted]; the caller
+/// flips the AdsRemovedNotifier. All failures are swallowed.
+class IapService {
+  IapService({required this.onEntitlementGranted});
+
+  final Future<void> Function() onEntitlementGranted;
+  final InAppPurchase _iap = InAppPurchase.instance;
+  StreamSubscription<List<PurchaseDetails>>? _sub;
+  ProductDetails? _product;
+
+  bool get available => _available;
+  bool _available = false;
+
+  ProductDetails? get product => _product;
+
+  Future<void> initialize() async {
+    try {
+      _available = await _iap.isAvailable();
+      if (!_available) return;
+      _sub = _iap.purchaseStream.listen(_onPurchases,
+          onError: (_) {}, cancelOnError: false);
+      final response =
+          await _iap.queryProductDetails({AdConfig.removeAdsProductId});
+      if (response.productDetails.isNotEmpty) {
+        _product = response.productDetails.first;
+      }
+    } catch (e) {
+      debugPrint('IAP init failed: $e');
+    }
+  }
+
+  Future<void> buyRemoveAds() async {
+    final product = _product;
+    if (product == null) return;
+    try {
+      await _iap.buyNonConsumable(
+          purchaseParam: PurchaseParam(productDetails: product));
+    } catch (e) {
+      debugPrint('IAP buy failed: $e');
+    }
+  }
+
+  Future<void> restorePurchases() async {
+    try {
+      await _iap.restorePurchases();
+    } catch (e) {
+      debugPrint('IAP restore failed: $e');
+    }
+  }
+
+  Future<void> _onPurchases(List<PurchaseDetails> purchases) async {
+    for (final p in purchases) {
+      if (p.productID != AdConfig.removeAdsProductId) continue;
+      if (p.status == PurchaseStatus.purchased ||
+          p.status == PurchaseStatus.restored) {
+        await onEntitlementGranted();
+      }
+      if (p.pendingCompletePurchase) {
+        await _iap.completePurchase(p);
+      }
+    }
+  }
+
+  void dispose() => _sub?.cancel();
+}