Line data    Source code

       1              : // Copyright 2023 The terCAD team. All rights reserved.
       2              : // Use of this source code is governed by a CC BY-NC-ND 4.0 license that can be found in the LICENSE file.
       3              : 
       4              : import 'dart:async';
       5              : 
       6              : import 'package:flutter/foundation.dart';
       7              : import 'package:in_app_purchase/in_app_purchase.dart';
       8              : 
       9              : class PurchaseController {
      10              :   static const pCoffee = 'fin_consumable_coffee';
      11              :   static const pDinner = 'fin_consumable_dinner';
      12              :   static const pInitial = 'fin_consumable_init';
      13              :   // static const pSubApple = 'fin_subscription_tiny'; Restricted without extended functionality
      14              :   // static const pSubGoogle = 'fin-subscription-tiny';
      15              : 
      16            0 :   static InAppPurchase iap = InAppPurchase.instance;
      17              : 
      18            0 :   static bool get supportsPurchases =>
      19            0 :       defaultTargetPlatform == TargetPlatform.iOS || defaultTargetPlatform == TargetPlatform.macOS;
      20              : 
      21              :   late StreamSubscription<List<PurchaseDetails>> _subscription;
      22              :   Function? callback;
      23              : 
      24            0 :   PurchaseController([this.callback]) {
      25            0 :     final purchaseUpdated = iap.purchaseStream;
      26            0 :     _subscription = purchaseUpdated.listen(
      27            0 :       _onUpdate,
      28            0 :       onDone: dispose,
      29            0 :       onError: _onError,
      30              :     );
      31              :   }
      32              : 
      33            0 :   dispose() {
      34            0 :     _subscription.cancel();
      35              :   }
      36              : 
      37            0 :   void _onError(dynamic error) {
      38              :     // ... trace error
      39              :   }
      40              : 
      41            0 :   Future<void> _onUpdate(List<PurchaseDetails> purchaseDetailsList) async {
      42            0 :     for (var purchaseDetails in purchaseDetailsList) {
      43            0 :       if (purchaseDetails.pendingCompletePurchase) {
      44            0 :         await iap.completePurchase(purchaseDetails);
      45              :       }
      46              :     }
      47            0 :     if (callback != null) {
      48            0 :       callback!(purchaseDetailsList);
      49              :     }
      50              :   }
      51              : 
      52            0 :   Future<List<ProductDetails>> load() async {
      53            0 :     if (!supportsPurchases) {
      54            0 :       return [];
      55              :     }
      56              : 
      57            0 :     final available = await iap.isAvailable();
      58              :     if (!available) {
      59            0 :       return [];
      60              :     }
      61            0 :     final response = await iap.queryProductDetails(<String>{
      62            0 :       pCoffee,
      63            0 :       pDinner,
      64            0 :       pInitial,
      65              :       // pSubApple,
      66              :       // pSubGoogle,
      67              :     });
      68            0 :     iap.restorePurchases();
      69            0 :     return response.productDetails;
      70              :   }
      71              : 
      72            0 :   static Future<bool> buy(ProductDetails product) async {
      73            0 :     if (!supportsPurchases) {
      74              :       return false;
      75              :     }
      76              : 
      77            0 :     final purchaseParam = PurchaseParam(productDetails: product);
      78            0 :     if (product.id.contains('subscription')) {
      79            0 :       await iap.buyNonConsumable(purchaseParam: purchaseParam);
      80              :     } else {
      81            0 :       await iap.buyConsumable(purchaseParam: purchaseParam);
      82              :     }
      83              : 
      84              :     return true;
      85              :   }
      86              : }