public InAppViewModel()
{
_inAppService = DependencyService.Get <IFortumoInAppService>();
_inAppService.OnQueryInventory += OnQueryInventory;
_inAppService.OnPurchaseProduct += OnPurchaseProduct;
_inAppService.OnRestoreProducts += OnRestoreProducts;
_purchases = new ObservableCollection <InAppPurchase>();
_purchaseList = new InAppPurchaseList();
InitializeProducts();
QueryCommand = new Command <InAppProduct>(
execute: (product) =>
{
_inAppService.QueryInventory();
});
PurchaseCommand = new Command <InAppProduct>(
execute: (product) =>
{
_inAppService.PurchaseProduct(product.ProductId);
});
RestoreCommand = new Command <InAppProduct>(
execute: (product) =>
{
_inAppService.RestoreProducts();
});
}
public void RestoreState(IDictionary <string, object> dictionary)
{
string purchases = GetDictionaryEntry(dictionary, "Purchases", string.Empty);
if (purchases != string.Empty)
{
DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(InAppPurchaseList));
using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(purchases)))
{
InAppPurchaseList purchaseList = (InAppPurchaseList)ser.ReadObject(ms);
Purchases = new ObservableCollection <InAppPurchase>(purchaseList.Purchases);
}
}
}
