Checking receipts and making purchases with ouya-csharp

OuyaComponent.cs

using System;
using System.Threading.Tasks;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.GamerServices;
using Ouya.Console.Api;

namespace Iap
{
    class OuyaComponent : GameComponent
    {
        static OuyaComponent instance;

        bool disposed;
        OuyaFacade facade;
        Product fullGameProduct;
        readonly string fullGameProductIdentifier = "your full game product identifier";
        readonly string developerUuid = "your developer uuid";

        static public OuyaComponent Instance
        {
            get
            {
                return instance;
            }
        }

        public OuyaComponent(Game game)
            : base(game)
        {
        }

        public override void Initialize()
        {
            base.Initialize();

            instance = this;

            facade = OuyaFacade.Instance;
            facade.Init(Game.Activity, developerUuid);

            if (!Guide.SimulateTrialMode)
                CheckPurchase();
        }

        protected override void Dispose(bool disposing)
        {
            if (!disposed)
            {
                // Be nice and shutdown the OUYA interface
                if (facade != null)
                {
                    facade.Shutdown();
                    facade = null;
                }
                instance = null;
            }
            disposed = true;
            base.Dispose(disposing);
        }

        async void CheckPurchase()
        {
            Guide.IsTrialMode = true;
            // Wait for a couple of secs before making the first call to OUYA. Recommended by OUYA people.
            await System.Threading.Tasks.Task.Delay(1000);
            try
            {
                // Check receipts first so we get the purchased state quicker
                Android.Util.Log.Debug("RequestReceipts", "Requesting receipts");
                var receipts = await facade.RequestReceiptsAsync();
                Android.Util.Log.Debug("RequestReceipts", receipts.Count.ToString() + " receipts returned");
                bool purchased = false;
                foreach (var receipt in receipts)
                {
                    if (receipt.Identifier == fullGameProductIdentifier)
                    {
                        purchased = true;
                        break;
                    }
                }
                Guide.IsTrialMode = !purchased;
                Android.Util.Log.Debug("RequestReceipts", "Guide.IsTrialMode = " + Guide.IsTrialMode);
            }
            catch (Exception e)
            {
                Android.Util.Log.Debug("RequestReceipts", e.Message);
                //Guide.ShowMessageBox("Marketplace Error", "There was an error retrieving receipts.\n" + e.Message, new string[] { "OK" }, 0, MessageBoxIcon.Error);
            }
            try
            {
                // Retrieve the product for full game purchase if required
                if (Guide.IsTrialMode)
                {
                    var products = await facade.RequestProductListAsync(fullGameProductIdentifier);
                    foreach (var product in products)
                    {
                        if (product.Identifier == fullGameProductIdentifier)
                        {
                            fullGameProduct = product;
                            break;
                        }
                    }
                }
            }
            catch (Exception e)
            {
                Android.Util.Log.Debug("RequestProducts", e.Message);
                //Guide.ShowMessageBox("Marketplace Error", "There was an error retrieving products.\n" + e.Message, new string[] { "OK" }, 0, MessageBoxIcon.Error);
            }
        }

        public async void RequestPurchase()
        {
            if (Guide.IsTrialMode)
            {
                if (Guide.SimulateTrialMode)
                {
                    Guide.BeginShowMessageBox("Simulate Purchase", "Simulate purchasing the game?", new string[] { "Purchase", "Cancel" }, 1, MessageBoxIcon.None, r =>
                    {
                        int? b = Guide.EndShowMessageBox(r);
                        if (b.HasValue)
                            Guide.IsTrialMode = b.Value == 0;
                    }, null);
                }
                else
                {
                    try
                    {
                        if (await facade.RequestPurchaseAsync(fullGameProduct))
                        {
                            Guide.IsTrialMode = false;
                        }
                    }
                    catch (TaskCanceledException)
                    {
                        // Do nothing. The user simply canceled the task
                    }
                    catch (Exception e)
                    {
                        Android.Util.Log.Debug("Purchase", e.Message);
                        Guide.ShowMessageBox("Purchase Error", "There was an error while making the purchase.\nPlease check your internet connection and try again later.", new string[] { "OK" }, 0, MessageBoxIcon.Error);
                    }
                }
            }
        }
    }
}