// When the page is constructed, the client receives all pre-existing cards
// from the database. These cards are loaded into a temporary list which are
// then read into the ObservableCollection. This intermediary step was made
// necessary due to the fact that ObservableCollections cannot be assigned to Lists.
private async void LoadFlashcards()
{
_loadedFlashcards = await FlashDBService.LoadFlashcards();
foreach (var message in _loadedFlashcards)
{
this.LoadedFlashcards.Add(message);
}
}
// The DB services are initialized with the selected group's information, tying them to the correct locations
// in Cosmos DB.
private async void InitializeServices()
{
chat = new ChatDBService();
flash = new FlashDBService();
// Initializes the ChangeFeedProcessor.
await chat.RunChangeFeedHostAsync();
await flash.RunChangeFeedHostAsync();
}
private async void SaveDeck()
{
// If the user has not added any flashcards to the deck, or failed to assign it a name, it won't be published to the database.
if (tempDeck.Count == 0 || DeckName == null)
{
return;
}
CardDeck deck = new CardDeck()
{
ObjType = "Card",
Name = DeckName,
CreatorAvatar = MainPageViewModel.CurrentGoogleAvatar,
CreatorName = MainPageViewModel.CurrentGoogleUsername,
Timestamp = DateTime.Now.Ticks.ToString(),
DeckContents = tempDeck,
Length = tempDeck.Count
};
await FlashDBService.UploadFlashCard(deck);
await _navigationService.GoBackAsync();
}
