Add macOS implementaiton

src/Plugin.InAppBilling/InAppBilling.apple.cs

@@ -5,17 +5,36 @@
 using System.Diagnostics;
 using System.Linq;
 using System.Threading.Tasks;
-using UIKit;
 
 namespace Plugin.InAppBilling
 {
 	/// <summary>
 	/// Implementation for InAppBilling
 	/// </summary>
 	[Preserve(AllMembers = true)]
-	public class InAppBillingImplementation : BaseInAppBilling
+	public class InAppBillingImplementation : BaseInAppBilling, ISKProductsRequestDelegate
 	{
-		static bool IsiOS112 => UIDevice.CurrentDevice.CheckSystemVersion(11, 2);
+#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>
 		/// Gets or sets a callback for out of band purchases to complete.
@@ -38,13 +57,15 @@ public InAppBillingImplementation()
 		/// </summary>
 		public override bool InTestingMode { get; set; }
 
-		/// <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)
+        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);
 
@@ -56,8 +77,8 @@ public async override Task<IEnumerable<InAppBillingProduct>> GetProductInfoAsync
 				ProductId = p.ProductIdentifier,
 				Description = p.LocalizedDescription,
 				CurrencyCode = p.PriceLocale?.CurrencyCode ?? string.Empty,
-				LocalizedIntroductoryPrice = IsiOS112 ? (p.IntroductoryPrice?.LocalizedPrice() ?? string.Empty) : string.Empty,
-				MicrosIntroductoryPrice = IsiOS112 ? (long)((p.IntroductoryPrice?.Price?.DoubleValue ?? 0) * 1000000d) : 0
+				LocalizedIntroductoryPrice = HasIntroductoryPrice ? (p.IntroductoryPrice?.LocalizedPrice() ?? string.Empty) : string.Empty,
+				MicrosIntroductoryPrice = HasIntroductoryPrice ? (long)((p.IntroductoryPrice?.Price?.DoubleValue ?? 0) * 1000000d) : 0
 			});
 		}
 
@@ -175,7 +196,9 @@ public async override Task<InAppBillingPurchase> PurchaseAsync(string productId,
 				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)
@@ -203,7 +226,9 @@ Task<bool> ValidateReceipt(IInAppBillingVerifyPurchase verifyPurchase, string pr
 		}
 
 
-		Task<SKPaymentTransaction> PurchaseAsync(string productId)
+		TaskCompletionSource<SKProduct> productTCS;
+
+		async Task<SKPaymentTransaction> PurchaseAsync(string productId)
 		{
 			var tcsTransaction = new TaskCompletionSource<SKPaymentTransaction>();
 
@@ -257,13 +282,35 @@ Task<SKPaymentTransaction> PurchaseAsync(string productId)
 
 			paymentObserver.TransactionCompleted += handler;
 
+#if __IOS__ || __TVOS__
+
 			var payment = SKPayment.CreateFrom(productId);
+#else
+			productTCS?.TrySetCanceled();
+			productTCS = new TaskCompletionSource<SKProduct>();
+			var productIdentifiers = NSSet.MakeNSObjectSet<NSString>(new NSString[] { new NSString(productId) });
+			var productsRequest = new SKProductsRequest(productIdentifiers);
+			productsRequest.Delegate = this; // for SKProductsRequestDelegate.ReceivedResponse
+			productsRequest.Start();
+			var product = await productTCS.Task;
+			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 tcsTransaction.Task;
+			return await tcsTransaction.Task;
 		}
 
 
+		public void ReceivedResponse(SKProductsRequest request, SKProductsResponse response)
+        {
+			productTCS?.TrySetResult(response?.Products?.FirstOrDefault());
+        }
+
+
 		/// <summary>
 		/// Consume a purchase with a purchase token.
 		/// </summary>
@@ -341,6 +388,7 @@ public override void Dispose(bool disposing)
 
 			base.Dispose(disposing);
 		}
+
     }
 
 
@@ -471,11 +519,15 @@ public static InAppBillingPurchase ToIABPurchase(this SKPaymentTransaction trans
 			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);
 
-            return new InAppBillingPurchase
+#else
+			var finalToken = string.Empty;
+#endif
+			return new InAppBillingPurchase
 			{
 				TransactionDateUtc = NSDateToDateTimeUtc(transaction.TransactionDate),
 				Id = p.TransactionIdentifier,

src/Plugin.InAppBilling/Plugin.InAppBilling.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="MSBuild.Sdk.Extras/2.0.54">
 	<PropertyGroup>
-		<TargetFrameworks>netstandard2.0;MonoAndroid10.0;Xamarin.iOS10;Xamarin.TVOS10</TargetFrameworks>
+		<TargetFrameworks>netstandard2.0;MonoAndroid10.0;Xamarin.iOS10;Xamarin.TVOS10;Xamarin.Mac20</TargetFrameworks>
     <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT' ">$(TargetFrameworks);uap10.0.16299;</TargetFrameworks>
 		<AssemblyName>Plugin.InAppBilling</AssemblyName>
 		<RootNamespace>Plugin.InAppBilling</RootNamespace>
@@ -61,6 +61,7 @@
 		<Compile Include="**\*.netstandard.cs" />
 	</ItemGroup>
 
+
 	<ItemGroup Condition=" $(TargetFramework.StartsWith('uap10.0')) ">
 		<Compile Include="**\*.uwp.cs" />
 	</ItemGroup>
@@ -77,7 +78,7 @@
 
   <ItemGroup Condition=" $(TargetFramework.StartsWith('MonoAndroid')) ">
 		<Compile Include="**\*.android.cs" />
-		<PackageReference Include="Xamarin.Essentials" Version="1.5.3.2" />
+		<PackageReference Include="Xamarin.Essentials" Version="1.6.1" />
     <PackageReference Include="Xamarin.Android.Google.BillingClient" Version="3.0.0" />
     <!--<PackageReference Include="Xamarin.AndroidX.Migration" Version="1.0.6.1" />-->
 	</ItemGroup>
@@ -90,4 +91,8 @@
 	<ItemGroup Condition=" $(TargetFramework.StartsWith('Xamarin.TVOS')) ">
 		<Compile Include="**\*.apple.cs" />
 	</ItemGroup>
+
+	<ItemGroup Condition=" $(TargetFramework.StartsWith('Xamarin.Mac')) ">
+		<Compile Include="**\*.apple.cs" />
+	</ItemGroup>
 </Project>