/// <summary>
/// NFC message event handler.
/// </summary>
public void MessageReceived(Message msg)
{
// MainPage handles the deal cards -message, which starts a new game.
// Both devices publish a set of cards, UseCards decides which
// one to use based on the random id (uniqueid).
App.CardModel.UseCards(msg);
App.CardModel.InitCardListing();
NavigationService.Navigate(new Uri("/GamePage.xaml?" + paramkey + "=1", UriKind.Relative));
}
/// <summary>
/// NFC message event handler.
/// </summary>
public void MessageReceived(Message msg)
{
// GamePage handles only the showcard -message
if (msg == null || msg.MessageType != Message.TypeEnum.EShowCard)
{
return;
}
bool needRepublish = false;
// Both players must select the same property, e.g. "engine"
if (msg.SelectedCardProperty != App.CardModel.SelectedCardPropertyName)
{
if (App.CardModel.SelectedCardPropertyName == null && msg.SelectedCardProperty != null)
{
App.CardModel.SelectedCardPropertyName = msg.SelectedCardProperty;
}
else if (App.CardModel.SelectedCardPropertyName != null && msg.SelectedCardProperty == null)
{
msg.SelectedCardProperty = App.CardModel.SelectedCardPropertyName;
}
else
{
App.CardModel.StatusMsg = "Your opponent selected " + msg.SelectedCardProperty;
needRepublish = true;
}
}
else if (App.CardModel.SelectedCardPropertyName == null && msg.SelectedCardProperty == null)
{
needRepublish = true;
}
if (needRepublish)
{
ClearSelection();
}
else
{
// Find the card and decide which one wins
foreach (CarTrumps.Model.Card card in App.CardModel)
{
if (card.CardId == msg.CardId)
{
App.CardModel.ChallengerCard = card;
App.CardModel.SelectWinnerCard();
// Show the winner -control and disable the menu bar buttons
NavigationService.Navigate(new Uri("/WinnerPage.xaml", UriKind.Relative));
break;
}
}
}
}
/// <summary>
/// Publish and subscribe a dealcards -message.
/// </summary>
public void DealCards()
{
state = ProtoState.DealCard;
if (IsMaster())
{
opponentsCards = App.CardModel.SuffleCards();
Message msg = new Message(Message.TypeEnum.EDealCards);
msg.CardIds = opponentsCards;
// Construct and serialize a dealcards -message.
MemoryStream mstream = _nfcMessage.SerializeMessage(msg);
var dataWriter = new Windows.Storage.Streams.DataWriter();
dataWriter.WriteBytes(mstream.GetBuffer());
// Publish the message
_publishedMsgId = _proximityDevice.PublishBinaryMessage("Windows.CarTrumps",
dataWriter.DetachBuffer(), NfcWriteCallback);
}
else
{
// subscribe for a reply
_subscribedMsgId = _proximityDevice.SubscribeForMessage("Windows.CarTrumps",
NfcMessageReceived);
}
}
/// <summary>
/// Publish and subscribe a showcard -message.
/// </summary>
public void ShowCard()
{
state = ProtoState.ShowCard;
StopAll();
// Construct and serialize a showcard -message.
Message msg = new Message(Message.TypeEnum.EShowCard);
msg.CardId = (ushort)App.CardModel.ActiveCard.CardId;
msg.SelectedCardProperty = App.CardModel.SelectedCardPropertyName;
MemoryStream mstream = _nfcMessage.SerializeMessage(msg);
var dataWriter = new Windows.Storage.Streams.DataWriter();
dataWriter.WriteBytes(mstream.GetBuffer());
// Publish the message
_publishedMsgId = _proximityDevice.PublishBinaryMessage("Windows.CarTrumps",
dataWriter.DetachBuffer(), NfcWriteCallback);
// and subscribe for a reply
_subscribedMsgId = _proximityDevice.SubscribeForMessage("Windows.CarTrumps",
NfcMessageReceived);
}
/// <summary>
/// Serializes this message into a stream (XML).
/// </summary>
public MemoryStream SerializeMessage(Message message)
{
MemoryStream stream = new MemoryStream();
try
{
stream.Position = 0;
DataContractSerializer serializer = new DataContractSerializer(typeof(Message));
serializer.WriteObject(stream, message);
}
catch (SerializationException ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
}
return stream;
}