/// <summary>
/// Called when the dialog is started and pushed onto the dialog stack.
/// </summary>
/// <param name="dc">The <see cref="DialogContext"/> for the current turn of conversation.</param>
/// <param name="options">Optional, initial information to pass to the dialog.</param>
/// <param name="cancellationToken">A cancellation token that can be used by other objects
/// or threads to receive notice of cancellation.</param>
/// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
/// <remarks>If the task is successful, the result indicates whether the dialog is still
/// active after the turn has been processed by the dialog.
///
/// You can use the <paramref name="options"/> parameter to include the QnA Maker context data,
/// which represents context from the previous query. To do so, the value should include a
/// `context` property of type <see cref="QnAResponseContext"/>.</remarks>
/// <seealso cref="DialogContext.BeginDialogAsync(string, object, CancellationToken)"/>
public override async Task <DialogTurnResult> BeginDialogAsync(DialogContext dc, object options = null, CancellationToken cancellationToken = default(CancellationToken))
{
if (dc == null)
{
throw new ArgumentNullException(nameof(dc));
}
if (dc.Context?.Activity?.Type != ActivityTypes.Message)
{
return(EndOfTurn);
}
var dialogOptions = new QnAMakerDialogOptions()
{
QnAMakerOptions = await GetQnAMakerOptionsAsync(dc).ConfigureAwait(false),
ResponseOptions = await GetQnAResponseOptionsAsync(dc).ConfigureAwait(false)
};
if (options != null)
{
dialogOptions = ObjectPath.Assign <QnAMakerDialogOptions>(dialogOptions, options);
}
ObjectPath.SetPathValue(dc.ActiveDialog.State, Options, dialogOptions);
return(await base.BeginDialogAsync(dc, dialogOptions, cancellationToken).ConfigureAwait(false));
}
private static void ResetOptions(DialogContext dc, QnAMakerDialogOptions dialogOptions)
{
// Resetting context and QnAId
dialogOptions.QnAMakerOptions.QnAId = 0;
dialogOptions.QnAMakerOptions.Context = new QnARequestContext();
// -Check if previous context is present, if yes then put it with the query
// -Check for id if query is present in reverse index.
var previousContextData = ObjectPath.GetPathValue <Dictionary <string, int> >(dc.ActiveDialog.State, QnAContextData, new Dictionary <string, int>());
var previousQnAId = ObjectPath.GetPathValue <int>(dc.ActiveDialog.State, PreviousQnAId, 0);
if (previousQnAId > 0)
{
dialogOptions.QnAMakerOptions.Context = new QnARequestContext
{
PreviousQnAId = previousQnAId
};
if (previousContextData.TryGetValue(dc.Context.Activity.Text, out var currentQnAId))
{
dialogOptions.QnAMakerOptions.QnAId = currentQnAId;
}
}
}