/// <summary>
/// This method is called when user enters a url in compose box from a domain that this app unfurls.
///
/// Application authenticates the user to read resource and insert a card with resource information and option to review it in a meeting.
/// </summary>
/// <param name="turnContext">Turn context.</param>
/// <param name="query">Query - this contains the url that user entered.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>ME response.</returns>
protected async override Task <MessagingExtensionResponse> OnTeamsAppBasedLinkQueryAsync(ITurnContext <IInvokeActivity> turnContext, AppBasedLinkQuery query, CancellationToken cancellationToken)
{
this.logger.LogInformation($"OnTeamsAppBasedLinkQueryAsync: {query.Url}");
// Make sure its a valid url.
if (!this.urlParser.IsValidResourceUrl(query.Url))
{
return(null);
}
// Make sure the user is signed-in.
var isUserSignedIn = await turnContext.IsUserSignedInAsync(this.appSettings.GraphConnectionName, query.State, cancellationToken);
if (!isUserSignedIn)
{
this.logger.LogInformation("User is not signed-in.");
var signInUrl = await turnContext.GetOAuthSignInUrlAsync(this.appSettings.GraphConnectionName, cancellationToken);
var signInResponse = this.GetSignInResponse(signInUrl);
return(signInResponse);
}
// If the user is signed-in:
// 1. Check if user is authorized to access the resource. (Skipped in this sample).
// 2. Create a card with resource information/preview image and option to review it in a meeting.
var resourceId = this.urlParser.GetResourceId(query.Url);
var resource = await this.resourceProvider.GetResourceAsync(resourceId);
return(this.GetContentCardResponse(resource));
}