/// <summary>
/// Starts a new dialog and pushes it onto the dialog stack.
/// </summary>
/// <param name="dialogId">ID of the dialog to start.</param>
/// <param name="options">Optional, information to pass to the dialog being started.</param>
/// <param name="cancellationToken">A cancellation token that can be used by other objects
/// or threads to receive notice of cancellation.</param>
/// <returns>A task that represents the work queued to execute.</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.</remarks>
/// <seealso cref="EndDialogAsync(object, CancellationToken)"/>
/// <seealso cref="PromptAsync(string, PromptOptions, CancellationToken)"/>
/// <seealso cref="Dialog.BeginDialogAsync(DialogContext, object, CancellationToken)"/>
public async Task <DialogTurnResult> BeginDialogAsync(string dialogId, object options = null, CancellationToken cancellationToken = default(CancellationToken))
{
try
{
if (string.IsNullOrEmpty(dialogId))
{
throw new ArgumentNullException(nameof(dialogId));
}
// Look up dialog
var dialog = FindDialog(dialogId);
if (dialog == null)
{
throw new Exception(
$"DialogContext.BeginDialogAsync(): A dialog with an id of '{dialogId}' wasn't found." +
" The dialog must be included in the current or parent DialogSet." +
" For example, if subclassing a ComponentDialog you can call AddDialog() within your constructor.");
}
// Push new instance onto stack
var instance = new DialogInstance
{
Id = dialogId,
State = new Dictionary <string, object>(),
};
Stack.Insert(0, instance);
// Call dialog's BeginAsync() method
await this.DebuggerStepAsync(dialog, DialogEvents.BeginDialog, cancellationToken).ConfigureAwait(false);
return(await dialog.BeginDialogAsync(this, options : options, cancellationToken : cancellationToken).ConfigureAwait(false));
}
catch (Exception err)
{
SetExceptionContextData(err);
throw;
}
}
public override async Task EndDialogAsync(ITurnContext turnContext, DialogInstance instance, DialogReason reason, CancellationToken cancellationToken = default)
{
// Send of of conversation to the skill if the dialog has been cancelled.
if (reason == DialogReason.CancelCalled || reason == DialogReason.ReplaceCalled)
{
await turnContext.TraceActivityAsync($"{GetType().Name}.EndDialogAsync()", label : $"ActivityType: {turnContext.Activity.Type}", cancellationToken : cancellationToken).ConfigureAwait(false);
var activity = (Activity)Activity.CreateEndOfConversationActivity();
// Apply conversation reference and common properties from incoming activity before sending.
activity.ApplyConversationReference(turnContext.Activity.GetConversationReference(), true);
activity.ChannelData = turnContext.Activity.ChannelData;
activity.Properties = turnContext.Activity.Properties;
var skillConversationId = (string)instance.State[SkillConversationIdStateKey];
// connection Name is not applicable for an EndDialog, as we don't expect as OAuthCard in response.
await SendToSkillAsync(turnContext, activity, skillConversationId, cancellationToken).ConfigureAwait(false);
}
await base.EndDialogAsync(turnContext, instance, reason, cancellationToken).ConfigureAwait(false);
}
protected virtual Task OnRepromptDialogAsync(ITurnContext turnContext, DialogInstance instance, CancellationToken cancellationToken = default(CancellationToken))
{
return(Task.CompletedTask);
}
protected virtual Task OnEndDialogAsync(ITurnContext context, DialogInstance instance, DialogReason reason, CancellationToken cancellationToken = default(CancellationToken))
{
return(Task.CompletedTask);
}
public virtual Task DialogEndAsync(ITurnContext turnContext, DialogInstance instance, DialogReason reason, CancellationToken cancellationToken = default(CancellationToken))
{
// No-op by default
return(Task.CompletedTask);
}
/// <summary>
/// Called when the dialog should re-prompt the user for input.
/// </summary>
/// <param name="turnContext">The context object for this turn.</param>
/// <param name="instance">State information for this 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>
/// <seealso cref="DialogContext.RepromptDialogAsync(CancellationToken)"/>
public virtual Task RepromptDialogAsync(ITurnContext turnContext, DialogInstance instance, CancellationToken cancellationToken = default(CancellationToken))
{
// No-op by default
return(Task.CompletedTask);
}
// NOTE: You should only call this if you don't have a dc to work with (such as OnResume())
private DialogContext CreateInnerDc(ITurnContext turnContext, DialogInstance instance)
{
var state = BuildDialogState(instance);
return(new DialogContext(this.Dialogs, turnContext, state));
}
private DialogContext CreateInnerDc(DialogContext outerDc, DialogInstance instance)
{
var state = BuildDialogState(instance);
return(new DialogContext(this.Dialogs, outerDc, state));
}
public virtual Task DialogEndAsync(ITurnContext context, DialogInstance instance, DialogReason reason)
{
// No-op by default
return(Task.CompletedTask);
}
public virtual Task DialogRepromptAsync(ITurnContext context, DialogInstance instance)
{
// No-op by default
return(Task.CompletedTask);
}