/// <summary>
/// Initializes Oxford API. Builds existing whitelist or creates one if one does not exist.
/// </summary>
public async static Task <bool> InitializeOxford(SpeechHelper speechHelper)
{
// Attempts to open whitelist folder, or creates one
StorageFolder whitelistFolder = await KnownFolders.PicturesLibrary.CreateFolderAsync(GeneralConstants.WhiteListFolderName, CreationCollisionOption.OpenIfExists);
// Creates a new instance of the Oxford API Controller
FaceApiRecognizer sdkController = FaceApiRecognizer.Instance;
sdkController.speechHelper = speechHelper;
// Attempts to open whitelist ID file, or creates one
StorageFile WhiteListIdFile = await whitelistFolder.CreateFileAsync("WhiteListId.txt", CreationCollisionOption.OpenIfExists);
// Reads whitelist file and stores value
string savedWhitelistId = await FileIO.ReadTextAsync(WhiteListIdFile);
// If the ID has not been created, creates a whitelist ID
if (savedWhitelistId == "")
{
string id = Guid.NewGuid().ToString();
await FileIO.WriteTextAsync(WhiteListIdFile, id);
savedWhitelistId = id;
}
// Builds whitelist from exisiting whitelist folder
await sdkController.CreateWhitelistFromFolderAsync(savedWhitelistId, whitelistFolder, null);
SettingsHelper.Instance.WorkspaceKey = savedWhitelistId;
ImageAnalyzer.PeopleGroupsUserDataFilter = SettingsHelper.Instance.WorkspaceKey;
FaceListManager.FaceListsUserDataFilter = SettingsHelper.Instance.WorkspaceKey;
// Return true to indicate that Oxford was initialized successfully
return(true);
}
/// <summary>
/// Triggered when media element used to play synthesized speech messages is loaded.
/// Initializes SpeechHelper and greets user.
/// </summary>
private async void speechMediaElement_Loaded(object sender, RoutedEventArgs e)
{
if (speech == null)
{
speech = new SpeechHelper(speechMediaElement);
await speech.Read(SpeechContants.InitialGreetingMessage);
}
else
{
// Prevents media element from re-greeting visitor
speechMediaElement.AutoPlay = false;
}
}
