public async Task <ActionResult> LtiSlide(string courseId, int slideIndex)
{
if (string.IsNullOrWhiteSpace(courseId))
{
return(RedirectToAction("Index", "Home"));
}
var userId = User.Identity.GetUserId();
var ltiRequestJson = FindLtiRequestJson();
var course = courseManager.GetCourse(courseId);
var slide = course.Slides[slideIndex];
if (!string.IsNullOrWhiteSpace(ltiRequestJson))
{
await ltiRequestsRepo.Update(userId, slide.Id, ltiRequestJson);
}
var visiter = await VisitSlide(courseId, slide.Id);
var exerciseSlide = slide as ExerciseSlide;
if (exerciseSlide != null)
{
var model = new CodeModel
{
CourseId = courseId,
SlideIndex = slideIndex,
SlideId = exerciseSlide.Id,
ExerciseBlock = exerciseSlide.Exercise,
Context = CreateRenderContext(course, exerciseSlide, userId, visiter, true)
};
return(View("LtiExerciseSlide", model));
}
var quizSlide = slide as QuizSlide;
if (quizSlide != null)
{
var model = new LtiQuizModel
{
CourseId = courseId,
Slide = quizSlide,
UserId = userId
};
return(View("LtiQuizSlide", model));
}
return(View());
}
public async Task <ActionResult> LtiSlide(string courseId, Guid slideId)
{
if (string.IsNullOrWhiteSpace(courseId))
{
return(RedirectToAction("Index", "Home"));
}
var course = courseManager.GetCourse(courseId);
var slide = course.GetSlideById(slideId);
string userId;
var owinRequest = Request.GetOwinContext().Request;
if (await owinRequest.IsAuthenticatedLtiRequestAsync())
{
var ltiRequest = await owinRequest.ParseLtiRequestAsync();
log.Info($"Нашёл LTI request в запросе: {ltiRequest.JsonSerialize()}");
userId = Request.GetOwinContext().Authentication.AuthenticationResponseGrant.Identity.GetUserId();
await ltiRequestsRepo.Update(courseId, userId, slide.Id, ltiRequest.JsonSerialize());
/* Substitute http(s) scheme with real scheme from header */
var uriBuilder = new UriBuilder(ltiRequest.Url)
{
Scheme = owinRequest.GetRealRequestScheme(),
Port = owinRequest.GetRealRequestPort()
};
return(Redirect(uriBuilder.Uri.AbsoluteUri));
}
/* For now user should be authenticated */
if (!User.Identity.IsAuthenticated)
{
return(new HttpStatusCodeResult(HttpStatusCode.Forbidden));
}
userId = User.Identity.GetUserId();
var visit = await VisitSlide(courseId, slide.Id, userId);
/* Try to send score via LTI immediately after slide visiting */
try
{
if (visit.IsPassed)
{
LtiUtils.SubmitScore(courseId, slide, userId, visit);
}
}
catch (Exception e)
{
ErrorLog.GetDefault(System.Web.HttpContext.Current).Log(new Error(e));
}
var exerciseSlide = slide as ExerciseSlide;
if (exerciseSlide != null)
{
var model = new CodeModel
{
CourseId = courseId,
SlideId = exerciseSlide.Id,
ExerciseBlock = exerciseSlide.Exercise,
Context = CreateRenderContext(course, exerciseSlide, isLti: true)
};
return(View("LtiExerciseSlide", model));
}
var quizSlide = slide as QuizSlide;
if (quizSlide != null)
{
var model = new LtiQuizModel
{
CourseId = courseId,
Slide = quizSlide,
UserId = userId
};
return(View("LtiQuizSlide", model));
}
return(View());
}
