public void UpdateOnlineStatus(string friendName, bool newStatus)
{
FriendsListEntry friend = FindFriend(friendName);
if (friend != null)
{
friend.isOnline = newStatus;
}
}
/// <summary>
/// Gets the view model for this <see cref="Page"/>.
/// This can be changed to a strongly typed view model.
/* </summary>
public ObservableDictionary DefaultViewModel
{
get { return this.defaultViewModel; }
}
*/
/// <summary>
/// Populates the page with content passed during navigation. Any saved state is also
/// provided when recreating a page from a prior session.
/// </summary>
/// <param name="sender">
/// The source of the event; typically <see cref="NavigationHelper"/>
/// </param>
/// <param name="e">Event data that provides both the navigation parameter passed to
/// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested and
/// a dictionary of state preserved by this page during an earlier
/// session. The state will be null the first time a page is visited.</param>
private void NavigationHelper_LoadState(object sender, LoadStateEventArgs e)
{
this.ScrollToBottom();
this.currFriend = AppServices.friendsData.FindFriend(AppServices.friendsData.currFriendsName);
this.currFriend.unreadCount = "0";
}
private void friendsListView_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (friendsListView.SelectionMode == ListViewSelectionMode.Single)
{
// If selected item is null (no selection) do nothing
if (friendsListView.SelectedItem == null)
{
return;
}
// Retrieve the selected friend and toggle the chat buttons
FriendsListEntry selectedFriend = friendsListView.SelectedItem as FriendsListEntry;
// Setup the chat variables and open the chat window if we already have a session
if (selectedFriend.sessionEstablished)
{
// Set the binding variables to the data from the current friend we are chatting with and hide the chat buttons
AppServices.friendsData.currFriendsName = selectedFriend.username;
AppServices.friendsData.chatHistory = selectedFriend.history;
AppServices.friendsData.sendButtonEnabled = true;
selectedFriend.chatButtonsVisible = false;
lastSelected = null;
friendsListView.SelectedItem = null;
Frame.Navigate(typeof(ChatPage));
}
else
{
// Stop showing the chat buttons for the last selected friend. If the last selected and current selected are the same toggle the buttons
// and return
if (lastSelected != null)
{
if (lastSelected.Equals(friendsListView.SelectedItem))
{
lastSelected.chatButtonsVisible = !lastSelected.chatButtonsVisible;
friendsListView.SelectedItem = null;
return;
}
else
{
lastSelected.chatButtonsVisible = false;
}
}
selectedFriend.chatButtonsVisible = true;
lastSelected = selectedFriend;
}
friendsListView.SelectedItem = null;
return;
}
else if (friendsListView.SelectionMode == ListViewSelectionMode.Multiple)
{
return;
}
}
// Compute the encryption keys and load the chat page
private void webChatButton_Click(object sender, RoutedEventArgs e)
{
// Tell the user we selected that a session is being established
if (lastSelected.isOnline && string.IsNullOrWhiteSpace(lastSelected.sessionID) == false)
{
AppServices.appWarpLastSentToUsername = lastSelected.username;
AppServices.warpClient.sendPrivateUpdate(lastSelected.username, MessageBuilder.bulidSessionEstablishedBytes(AppServices.defaultEncryptionKey));
}
else if (lastSelected.isOnline == false)
{
return;
}
// No session exists so we create a session
int compareResult = string.Compare(AppServices.localUsernameEncrypted, lastSelected.encryptedUsername);
this.keyBuff = null;
// My username is greater so we use my sessionID as the encryptionKey
if (compareResult > 0)
{
keyBuff = CryptographicBuffer.ConvertStringToBinary(AppServices.localSessionId, BinaryStringEncoding.Utf8);
}
else
{
keyBuff = CryptographicBuffer.ConvertStringToBinary(lastSelected.sessionID, BinaryStringEncoding.Utf8);
}
lastSelected.encryptionKey = AppServices.encryptionAlgorithim.CreateSymmetricKey(keyBuff);
// Set the binding variables to the data from the current friend we are chatting with and hide the chat buttons
AppServices.friendsData.currFriendsName = lastSelected.username;
AppServices.friendsData.chatHistory = lastSelected.history;
AppServices.friendsData.sendButtonEnabled = true;
lastSelected.chatButtonsVisible = false;
lastSelected = null;
this.Frame.Navigate(typeof(ChatPage));
}
private void ProximityDeviceDeparted(object sender)
{
if (this.publishedMessageID != -1)
{
AppServices.myProximityDevice.StopPublishingMessage(this.publishedMessageID);
this.publishedMessageID = -1;
}
if (this.subscribedMessageID != -1)
{
AppServices.myProximityDevice.StopSubscribingForMessage(this.subscribedMessageID);
this.subscribedMessageID = -1;
}
AppServices.myProximityDevice.DeviceArrived -= ProximityDeviceArrived;
AppServices.myProximityDevice.DeviceDeparted -= ProximityDeviceDeparted;
this.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
// Set the binding variables to the data from the current friend we are chatting with and hide the chat buttons
AppServices.friendsData.currFriendsName = lastSelected.username;
AppServices.friendsData.chatHistory = lastSelected.history;
AppServices.friendsData.sendButtonEnabled = true;
lastSelected.chatButtonsVisible = false;
lastSelected = null;
this.Frame.Navigate(typeof(ChatPage));
});
}
private void nfcChatButton_Click(object sender, RoutedEventArgs e)
{
if (lastSelected.isOnline == false)
{
this.PrintMessage("User is not online, cannot start chat.");
return;
}
if (lastSelected.sessionEstablished)
{
lastSelected.chatButtonsVisible = false;
lastSelected = null;
this.Frame.Navigate(typeof(ChatPage));
return;
}
if (AppServices.myProximityDevice == null)
{
AppServices.myProximityDevice = Windows.Networking.Proximity.ProximityDevice.GetDefault();
if (AppServices.myProximityDevice == null)
{
this.PrintMessage("Unable to get NFC chip. This device might not be capable of proximity interactions or NFC is disabled in settings");
return;
}
AppServices.myProximityDevice.DeviceArrived += ProximityDeviceArrived;
AppServices.myProximityDevice.DeviceDeparted += ProximityDeviceDeparted;
}
int compareResult = string.Compare(AppServices.localUsernameEncrypted, lastSelected.encryptedUsername);
this.keyBuff = null;
// My username is greater so I generate a key
if (compareResult > 0)
{
keyBuff = CryptographicBuffer.GenerateRandom(256);
}
PrintMessage("Please close this message and then tap and hold the devices together");
}
