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InAppBilling.apple.cs
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InAppBilling.apple.cs
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using Foundation;
using StoreKit;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Threading.Tasks;
namespace Plugin.InAppBilling
{
/// <summary>
/// Implementation for InAppBilling
/// </summary>
[Preserve(AllMembers = true)]
public class InAppBillingImplementation : BaseInAppBilling
{
#if __IOS__ || __TVOS__
static bool HasIntroductoryPrice => UIKit.UIDevice.CurrentDevice.CheckSystemVersion(11, 2);
#else
static bool initIntro, hasIntro;
static bool HasIntroductoryPrice
{
get
{
if (initIntro)
return hasIntro;
initIntro = true;
using var info = new NSProcessInfo();
hasIntro = info.IsOperatingSystemAtLeastVersion(new NSOperatingSystemVersion(10,13,2));
return hasIntro;
}
}
#endif
/// <summary>
/// Determines if it is connected to the backend actively (Android).
/// </summary>
public override bool IsConnected { get; set; } = true;
/// <summary>
/// Gets or sets a callback for out of band purchases to complete.
/// </summary>
public static Action<InAppBillingPurchase> OnPurchaseComplete { get; set; } = null;
public static Func<SKPaymentQueue, SKPayment, SKProduct, bool> OnShouldAddStorePayment { get; set; } = null;
/// <summary>
/// Default constructor for In App Billing on iOS
/// </summary>
public InAppBillingImplementation()
{
paymentObserver = new PaymentObserver(OnPurchaseComplete, OnShouldAddStorePayment);
SKPaymentQueue.DefaultQueue.AddTransactionObserver(paymentObserver);
}
/// <summary>
/// Gets or sets if in testing mode. Only for UWP
/// </summary>
public override bool InTestingMode { get; set; }
public IntPtr Handle => throw new NotImplementedException();
/// <summary>
/// Get product information of a specific product
/// </summary>
/// <param name="productIds">Sku or Id of the product(s)</param>
/// <param name="itemType">Type of product offering</param>
/// <returns></returns>
public async override Task<IEnumerable<InAppBillingProduct>> GetProductInfoAsync(ItemType itemType, params string[] productIds)
{
var products = await GetProductAsync(productIds);
return products.Select(p => new InAppBillingProduct
{
LocalizedPrice = p.LocalizedPrice(),
MicrosPrice = (long)(p.Price.DoubleValue * 1000000d),
Name = p.LocalizedTitle,
ProductId = p.ProductIdentifier,
Description = p.LocalizedDescription,
CurrencyCode = p.PriceLocale?.CurrencyCode ?? string.Empty,
LocalizedIntroductoryPrice = HasIntroductoryPrice ? (p.IntroductoryPrice?.LocalizedPrice() ?? string.Empty) : string.Empty,
MicrosIntroductoryPrice = HasIntroductoryPrice ? (long)((p.IntroductoryPrice?.Price?.DoubleValue ?? 0) * 1000000d) : 0
});
}
Task<IEnumerable<SKProduct>> GetProductAsync(string[] productId)
{
var productIdentifiers = NSSet.MakeNSObjectSet<NSString>(productId.Select(i => new NSString(i)).ToArray());
var productRequestDelegate = new ProductRequestDelegate();
//set up product request for in-app purchase
var productsRequest = new SKProductsRequest(productIdentifiers)
{
Delegate = productRequestDelegate // SKProductsRequestDelegate.ReceivedResponse
};
productsRequest.Start();
return productRequestDelegate.WaitForResponse();
}
public async override Task<IEnumerable<InAppBillingPurchase>> GetPurchasesAsync(ItemType itemType)
{
var purchases = await RestoreAsync();
var comparer = new InAppBillingPurchaseComparer();
return purchases
?.Where(p => p != null)
?.Select(p2 => p2.ToIABPurchase())
?.Distinct(comparer);
}
Task<SKPaymentTransaction[]> RestoreAsync()
{
var tcsTransaction = new TaskCompletionSource<SKPaymentTransaction[]>();
var allTransactions = new List<SKPaymentTransaction>();
Action<SKPaymentTransaction[]> handler = null;
handler = new Action<SKPaymentTransaction[]>(transactions =>
{
// Unsubscribe from future events
paymentObserver.TransactionsRestored -= handler;
if (transactions == null)
{
if (allTransactions.Count == 0)
tcsTransaction.TrySetException(new InAppBillingPurchaseException(PurchaseError.RestoreFailed, "Restore Transactions Failed"));
else
tcsTransaction.TrySetResult(allTransactions.ToArray());
}
else
{
allTransactions.AddRange(transactions);
tcsTransaction.TrySetResult(allTransactions.ToArray());
}
});
paymentObserver.TransactionsRestored += handler;
foreach (var trans in SKPaymentQueue.DefaultQueue.Transactions)
{
var original = FindOriginalTransaction(trans);
if (original == null)
continue;
allTransactions.Add(original);
}
// Start receiving restored transactions
SKPaymentQueue.DefaultQueue.RestoreCompletedTransactions();
return tcsTransaction.Task;
}
static SKPaymentTransaction FindOriginalTransaction(SKPaymentTransaction transaction)
{
if (transaction == null)
return null;
if (transaction.TransactionState == SKPaymentTransactionState.Purchased ||
transaction.TransactionState == SKPaymentTransactionState.Purchasing)
return transaction;
if (transaction.OriginalTransaction != null)
return FindOriginalTransaction(transaction.OriginalTransaction);
return transaction;
}
/// <summary>
/// Purchase a specific product or subscription
/// </summary>
/// <param name="productId">Sku or ID of product</param>
/// <param name="itemType">Type of product being requested</param>
/// <param name="verifyPurchase">Interface to verify purchase</param>
/// <param name="obfuscatedAccountId">Specifies an optional obfuscated string that is uniquely associated with the user's account in your app.</param>
/// <param name="obfuscatedProfileId">Specifies an optional obfuscated string that is uniquely associated with the user's profile in your app.</param>
/// <returns></returns>
public async override Task<InAppBillingPurchase> PurchaseAsync(string productId, ItemType itemType, IInAppBillingVerifyPurchase verifyPurchase = null, string obfuscatedAccountId = null, string obfuscatedProfileId = null)
{
var p = await PurchaseAsync(productId);
var reference = new DateTime(2001, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
var purchase = new InAppBillingPurchase
{
TransactionDateUtc = reference.AddSeconds(p.TransactionDate.SecondsSinceReferenceDate),
Id = p.TransactionIdentifier,
ProductId = p.Payment?.ProductIdentifier ?? string.Empty,
State = p.GetPurchaseState(),
#if __IOS__ || __TVOS__
PurchaseToken = p.TransactionReceipt?.GetBase64EncodedString(NSDataBase64EncodingOptions.None) ?? string.Empty
#endif
};
if (verifyPurchase == null)
return purchase;
var validated = await ValidateReceipt(verifyPurchase, purchase.ProductId, purchase.Id);
return validated ? purchase : null;
}
Task<bool> ValidateReceipt(IInAppBillingVerifyPurchase verifyPurchase, string productId, string transactionId)
{
if (verifyPurchase == null)
return Task.FromResult(true);
// Get the receipt data for (server-side) validation.
// See: https://developer.apple.com/library/content/releasenotes/General/ValidateAppStoreReceipt/Introduction.html#//apple_ref/doc/uid/TP40010573
NSData receiptUrl = null;
if(NSBundle.MainBundle.AppStoreReceiptUrl != null)
receiptUrl = NSData.FromUrl(NSBundle.MainBundle.AppStoreReceiptUrl);
var receipt = receiptUrl?.GetBase64EncodedString(NSDataBase64EncodingOptions.None);
return verifyPurchase.VerifyPurchase(receipt, string.Empty, productId, transactionId);
}
TaskCompletionSource<SKProduct> productTCS;
async Task<SKPaymentTransaction> PurchaseAsync(string productId)
{
var tcsTransaction = new TaskCompletionSource<SKPaymentTransaction>();
Action<SKPaymentTransaction, bool> handler = null;
handler = new Action<SKPaymentTransaction, bool>((tran, success) =>
{
if (tran?.Payment == null)
return;
// Only handle results from this request
if (productId != tran.Payment.ProductIdentifier)
return;
// Unsubscribe from future events
paymentObserver.TransactionCompleted -= handler;
if (success)
{
tcsTransaction.TrySetResult(tran);
return;
}
var errorCode = tran?.Error?.Code ?? -1;
var description = tran?.Error?.LocalizedDescription ?? string.Empty;
var error = PurchaseError.GeneralError;
switch (errorCode)
{
case (int)SKError.PaymentCancelled:
error = PurchaseError.UserCancelled;
break;
case (int)SKError.PaymentInvalid:
error = PurchaseError.PaymentInvalid;
break;
case (int)SKError.PaymentNotAllowed:
error = PurchaseError.PaymentNotAllowed;
break;
case (int)SKError.ProductNotAvailable:
error = PurchaseError.ItemUnavailable;
break;
case (int)SKError.Unknown:
try
{
var underlyingError = tran?.Error?.UserInfo?["NSUnderlyingError"] as NSError;
error = underlyingError?.Code == 3038 ? PurchaseError.AppleTermsConditionsChanged : PurchaseError.GeneralError;
}
catch
{
error = PurchaseError.GeneralError;
}
break;
case (int)SKError.ClientInvalid:
error = PurchaseError.BillingUnavailable;
break;
}
tcsTransaction.TrySetException(new InAppBillingPurchaseException(error, description));
});
paymentObserver.TransactionCompleted += handler;
#if __IOS__ || __TVOS__
var payment = SKPayment.CreateFrom(productId);
#else
var products = await GetProductAsync(new[] { productId });
var product = products?.FirstOrDefault();
if (product == null)
throw new InAppBillingPurchaseException(PurchaseError.InvalidProduct);
var payment = SKPayment.CreateFrom(product);
//var payment = SKPayment.CreateFrom((SKProduct)SKProduct.FromObject(new NSString(productId)));
#endif
SKPaymentQueue.DefaultQueue.AddPayment(payment);
return await tcsTransaction.Task;
}
/// <summary>
/// Consume a purchase with a purchase token.
/// </summary>
/// <param name="productId">Id or Sku of product</param>
/// <param name="purchaseToken">Original Purchase Token</param>
/// <returns>If consumed successful</returns>
/// <exception cref="InAppBillingPurchaseException">If an error occures during processing</exception>
public override Task<bool> ConsumePurchaseAsync(string productId, string purchaseToken) =>
null;
public override Task<bool> FinishTransaction(InAppBillingPurchase purchase) =>
FinishTransaction(purchase?.Id);
public override async Task<bool> FinishTransaction(string purchaseId)
{
if (string.IsNullOrWhiteSpace(purchaseId))
throw new ArgumentException("PurchaseId must be valid", nameof(purchaseId));
var purchases = await RestoreAsync();
if (purchases == null)
return false;
var transaction = purchases.Where(p => p.TransactionIdentifier == purchaseId).FirstOrDefault();
if (transaction == null)
return false;
SKPaymentQueue.DefaultQueue.FinishTransaction(transaction);
return true;
}
PaymentObserver paymentObserver;
static DateTime NSDateToDateTimeUtc(NSDate date)
{
var reference = new DateTime(2001, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
return reference.AddSeconds(date?.SecondsSinceReferenceDate ?? 0);
}
private bool disposed = false;
/// <summary>
/// Dispose
/// </summary>
/// <param name="disposing"></param>
public override void Dispose(bool disposing)
{
if (disposed)
{
base.Dispose(disposing);
return;
}
disposed = true;
if (!disposing)
{
base.Dispose(disposing);
return;
}
if (paymentObserver != null)
{
SKPaymentQueue.DefaultQueue.RemoveTransactionObserver(paymentObserver);
paymentObserver.Dispose();
paymentObserver = null;
}
base.Dispose(disposing);
}
}
[Preserve(AllMembers = true)]
class ProductRequestDelegate : NSObject, ISKProductsRequestDelegate, ISKRequestDelegate
{
TaskCompletionSource<IEnumerable<SKProduct>> tcsResponse = new TaskCompletionSource<IEnumerable<SKProduct>>();
public Task<IEnumerable<SKProduct>> WaitForResponse() =>
tcsResponse.Task;
[Export("request:didFailWithError:")]
public void RequestFailed(SKRequest request, NSError error) =>
tcsResponse.TrySetException(new InAppBillingPurchaseException(PurchaseError.ProductRequestFailed, error.LocalizedDescription));
public void ReceivedResponse(SKProductsRequest request, SKProductsResponse response)
{
var invalidProduct = response.InvalidProducts;
if (invalidProduct?.Any() ?? false)
{
tcsResponse.TrySetException(new InAppBillingPurchaseException(PurchaseError.InvalidProduct, $"Invalid Product: {invalidProduct.First()}"));
return;
}
var product = response.Products;
if (product != null)
{
tcsResponse.TrySetResult(product);
return;
}
}
}
[Preserve(AllMembers = true)]
class PaymentObserver : SKPaymentTransactionObserver
{
public event Action<SKPaymentTransaction, bool> TransactionCompleted;
public event Action<SKPaymentTransaction[]> TransactionsRestored;
List<SKPaymentTransaction> restoredTransactions = new List<SKPaymentTransaction>();
private readonly Action<InAppBillingPurchase> onPurchaseSuccess;
private readonly Func<SKPaymentQueue, SKPayment, SKProduct, bool> onShouldAddStorePayment;
public PaymentObserver(Action<InAppBillingPurchase> onPurchaseSuccess, Func<SKPaymentQueue, SKPayment, SKProduct, bool> onShouldAddStorePayment)
{
this.onPurchaseSuccess = onPurchaseSuccess;
this.onShouldAddStorePayment = onShouldAddStorePayment;
}
public override bool ShouldAddStorePayment(SKPaymentQueue queue, SKPayment payment, SKProduct product)
{
return onShouldAddStorePayment?.Invoke(queue, payment, product) ?? false;
}
public override void UpdatedTransactions(SKPaymentQueue queue, SKPaymentTransaction[] transactions)
{
var rt = transactions.Where(pt => pt.TransactionState == SKPaymentTransactionState.Restored);
// Add our restored transactions to the list
// We might still get more from the initial request so we won't raise the event until
// RestoreCompletedTransactionsFinished is called
if (rt?.Any() ?? false)
restoredTransactions.AddRange(rt);
foreach (var transaction in transactions)
{
if (transaction?.TransactionState == null)
break;
Debug.WriteLine($"Updated Transaction | {transaction.ToStatusString()}");
switch (transaction.TransactionState)
{
case SKPaymentTransactionState.Restored:
case SKPaymentTransactionState.Purchased:
TransactionCompleted?.Invoke(transaction, true);
onPurchaseSuccess?.Invoke(transaction.ToIABPurchase());
SKPaymentQueue.DefaultQueue.FinishTransaction(transaction);
break;
case SKPaymentTransactionState.Failed:
TransactionCompleted?.Invoke(transaction, false);
SKPaymentQueue.DefaultQueue.FinishTransaction(transaction);
break;
default:
break;
}
}
}
public override void RestoreCompletedTransactionsFinished(SKPaymentQueue queue)
{
if (restoredTransactions == null)
return;
// This is called after all restored transactions have hit UpdatedTransactions
// at this point we are done with the restore request so let's fire up the event
var allTransactions = restoredTransactions.ToArray();
// Clear out the list of incoming restore transactions for future requests
restoredTransactions.Clear();
TransactionsRestored?.Invoke(allTransactions);
foreach (var transaction in allTransactions)
SKPaymentQueue.DefaultQueue.FinishTransaction(transaction);
}
// Failure, just fire with null
public override void RestoreCompletedTransactionsFailedWithError(SKPaymentQueue queue, NSError error) =>
TransactionsRestored?.Invoke(null);
}
[Preserve(AllMembers = true)]
static class SKTransactionExtensions
{
public static string ToStatusString(this SKPaymentTransaction transaction) =>
transaction?.ToIABPurchase()?.ToString() ?? string.Empty;
public static InAppBillingPurchase ToIABPurchase(this SKPaymentTransaction transaction)
{
var p = transaction?.OriginalTransaction ?? transaction;
if (p == null)
return null;
#if __IOS__ || __TVOS__
var finalToken = p.TransactionReceipt?.GetBase64EncodedString(NSDataBase64EncodingOptions.None);
if (string.IsNullOrEmpty(finalToken))
finalToken = transaction.TransactionReceipt?.GetBase64EncodedString(NSDataBase64EncodingOptions.None);
#else
var finalToken = string.Empty;
#endif
return new InAppBillingPurchase
{
TransactionDateUtc = NSDateToDateTimeUtc(transaction.TransactionDate),
Id = p.TransactionIdentifier,
ProductId = p.Payment?.ProductIdentifier ?? string.Empty,
State = p.GetPurchaseState(),
PurchaseToken = finalToken
};
}
static DateTime NSDateToDateTimeUtc(NSDate date)
{
var reference = new DateTime(2001, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
return reference.AddSeconds(date?.SecondsSinceReferenceDate ?? 0);
}
public static PurchaseState GetPurchaseState(this SKPaymentTransaction transaction)
{
if (transaction?.TransactionState == null)
return PurchaseState.Unknown;
switch (transaction.TransactionState)
{
case SKPaymentTransactionState.Restored:
return PurchaseState.Restored;
case SKPaymentTransactionState.Purchasing:
return PurchaseState.Purchasing;
case SKPaymentTransactionState.Purchased:
return PurchaseState.Purchased;
case SKPaymentTransactionState.Failed:
return PurchaseState.Failed;
case SKPaymentTransactionState.Deferred:
return PurchaseState.Deferred;
}
return PurchaseState.Unknown;
}
}
[Preserve(AllMembers = true)]
static class SKProductExtension
{
/// <remarks>
/// Use Apple's sample code for formatting a SKProduct price
/// https://developer.apple.com/library/ios/#DOCUMENTATION/StoreKit/Reference/SKProduct_Reference/Reference/Reference.html#//apple_ref/occ/instp/SKProduct/priceLocale
/// Objective-C version:
/// NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
/// [numberFormatter setFormatterBehavior:NSNumberFormatterBehavior10_4];
/// [numberFormatter setNumberStyle:NSNumberFormatterCurrencyStyle];
/// [numberFormatter setLocale:product.priceLocale];
/// NSString *formattedString = [numberFormatter stringFromNumber:product.price];
/// </remarks>
public static string LocalizedPrice(this SKProduct product)
{
if (product?.PriceLocale == null)
return string.Empty;
var formatter = new NSNumberFormatter()
{
FormatterBehavior = NSNumberFormatterBehavior.Version_10_4,
NumberStyle = NSNumberFormatterStyle.Currency,
Locale = product.PriceLocale
};
var formattedString = formatter.StringFromNumber(product.Price);
Console.WriteLine(" ** formatter.StringFromNumber(" + product.Price + ") = " + formattedString + " for locale " + product.PriceLocale.LocaleIdentifier);
return formattedString;
}
public static string LocalizedPrice(this SKProductDiscount product)
{
if (product?.PriceLocale == null)
return string.Empty;
var formatter = new NSNumberFormatter()
{
FormatterBehavior = NSNumberFormatterBehavior.Version_10_4,
NumberStyle = NSNumberFormatterStyle.Currency,
Locale = product.PriceLocale
};
var formattedString = formatter.StringFromNumber(product.Price);
Console.WriteLine(" ** formatter.StringFromNumber(" + product.Price + ") = " + formattedString + " for locale " + product.PriceLocale.LocaleIdentifier);
return formattedString;
}
}
}