/// <summary>
/// Initializes a new instance of the IntentDialog class
/// </summary>
/// <param name="dialogId"></param>
/// <param name="intentFactory"></param>
/// <param name="logger"></param>
public IntentDialogBase(
string dialogId,
IIntentFactory intentFactory,
IntentHandlerFactory intentHandlerFactory,
OAuthDialog oAuthDialog,
ILogger logger)
: base(dialogId)
{
this.intentFactory = intentFactory;
this.intentHandlerFactory = intentHandlerFactory;
this.logger = logger;
// Add common prompts
this.AddDialog(new TextPrompt(nameof(TextPrompt)));
this.AddDialog(oAuthDialog);
// Add main flow waterfall
var warterfallSteps = new WaterfallStep[]
{
GetIntentStepAsync,
GetUserInputStepAsync,
ExecuteTaskStepAsync,
};
AddDialog(new WaterfallDialog(nameof(WaterfallDialog), warterfallSteps));
// Add children dialogs required by the intent factory
foreach (var dialog in this.intentFactory.Dialogs)
{
AddDialog(dialog);
}
// Set the initial child Dialog to the waterfall dialog
InitialDialogId = nameof(WaterfallDialog);
}
/// <summary>
/// Azure bot service might return expired token. Add this step to ensure it's valid by logging user out and ask for reauth
/// </summary>
/// <param name="stepContext">step context</param>
/// <param name="cancellationToken"></param>
/// <returns>dialog turn result</returns>
private async Task <DialogTurnResult> EnsureValidTokenStepAsync(WaterfallStepContext stepContext, CancellationToken cancellationToken)
{
var tokenResponse = stepContext.Result as TokenResponse;
TokenResponse tokenToReturn = null;
if (tokenResponse?.Token != null)
{
var jwtToken = new JwtSecurityToken(tokenResponse.Token);
// Check token expiration. 5 minutes is industry stand for clock skew
if (jwtToken.ValidTo < DateTime.UtcNow.AddMinutes(5))
{
// we have a token but it has expired. This seems to be a bug in Azure bot service.
// We need to work around it by logging user out first and then ask for logging in again
var userId = stepContext.Context.Activity?.From?.Id;
this.logger.LogWarning($"Token for user {userId} expired. Will logout and let user retry.");
// Sign user out
await OAuthDialog.SignOutAsync(stepContext.Context, this.oAuthPromptSettings.ConnectionName, this.logger, cancellationToken);
// Ask user to sign in again by restarting StartAuthStepAsync
await stepContext.Context.SendActivityAsync(MessageFactory.Text("Your token expired. Please sign in again."), cancellationToken);
return(await this.StartAuthStepAsync(stepContext, cancellationToken));
}
// Token is good, set it to the return value
tokenToReturn = tokenResponse;
}
// For all other cases (success or other authentication failure), move to next step.
return(await stepContext.NextAsync(tokenToReturn, cancellationToken));
}
/// <summary>
/// Initializes a new LuisIntentDialog
/// </summary>
/// <param name="intentService"></param>
/// <param name="intentFactory"></param>
/// <param name="intentHandlerFactory"></param>
/// <param name="logger"></param>
public IntentDialog(
IIntentService intentService,
IIntentFactory intentFactory,
IntentHandlerFactory intentHandlerFactory,
OAuthDialog oAuthDialog,
ILogger <IntentDialog> logger)
: base(nameof(IntentDialog), intentFactory, intentHandlerFactory, oAuthDialog, logger)
{
this.intentService = intentService;
}
