private async Task <ReplaceResultResponse> ReplaceResultAsync(ReplaceResultRequest request)
{
var response = new ReplaceResultResponse();
var ltiRequest = await Request.ParseLtiRequestAsync();
var signature = ltiRequest.GenerateSignature("secret");
if (!ltiRequest.Signature.Equals(signature))
{
response.StatusCode = StatusCodes.Status401Unauthorized;
return(response);
}
if (_result == null)
{
_result = new Result();
}
if (_result == null)
{
return(response);
}
_result.Score = request.Result.Score;
_result.SourcedId = request.Result.SourcedId;
return(response);
}
private async Task <ReplaceResultResponse> ReplaceResultAsync(ReplaceResultRequest request)
{
var response = new ReplaceResultResponse();
var ltiRequest = await Request.ParseLtiRequestAsync();
var signature = ltiRequest.GenerateSignature("secret");
if (!ltiRequest.Signature.Equals(signature))
{
response.StatusCode = StatusCodes.Status401Unauthorized;
return(response);
}
if (_result == null)
{
_result = new Result();
}
if (_result == null)
{
return(response);
}
_result.Score = request.Result.Score;
_result.SourcedId = request.Result.SourcedId;
// Optional fields supported by Canvas
_result.LtiLaunchUrl = request.Result.LtiLaunchUrl;
_result.Text = request.Result.Text;
_result.Url = request.Result.Url;
return(response);
}
private async Task <ReplaceResultResponse> ReplaceResultAsync(ReplaceResultRequest arg)
{
// Authenticate the LTI Request
var response = new ReplaceResultResponse();
var ltiRequest = await Request.ParseLtiRequestAsync();
var signature = ltiRequest.GenerateSignature("secret");
if (!ltiRequest.Signature.Equals(signature))
{
response.StatusCode = StatusCodes.Status401Unauthorized;
return(response);
}
// Lookup the "offline" TokenResponse for the TeacherId
var lisResultSourcedId = JsonConvert.DeserializeObject <LisResultSourcedId>(arg.Result.SourcedId);
var googleUser = await Db.GoogleUsers.FindAsync(lisResultSourcedId.TeacherId);
var appFlow = new AppFlowMetadata(ClientId, ClientSecret, Db);
var token = await appFlow.Flow.LoadTokenAsync(googleUser.UserId, CancellationToken.None);
// Using the TokenResponse, create a UserCredential for the teacher
var credential = new UserCredential(appFlow.Flow, googleUser.UserId, token);
// Using the teacher's UserCredential, create an instance of the ClassroomService
using (var classroomService = new ClassroomService(new BaseClientService.Initializer
{
HttpClientInitializer = credential,
ApplicationName = "gc2lti"
}))
{
// Using the ClassroomService, get the CourseWork for the assignment
var courseWorkRequest = classroomService.Courses.CourseWork.Get
(
lisResultSourcedId.CourseId,
lisResultSourcedId.CourseWorkId
);
var courseWork = await courseWorkRequest.ExecuteAsync();
// Then get the student's StudentSubmission
var submissionsRequest = classroomService.Courses.CourseWork.StudentSubmissions.List
(
lisResultSourcedId.CourseId,
lisResultSourcedId.CourseWorkId
);
submissionsRequest.UserId = lisResultSourcedId.StudentId;
var submissionsResponse = await submissionsRequest.ExecuteAsync();
if (submissionsResponse.StudentSubmissions == null)
{
response.StatusCode = StatusCodes.Status404NotFound;
response.StatusDescription = "Submission was not found.";
return(response);
}
var submission = submissionsResponse.StudentSubmissions.FirstOrDefault();
// Set the AssignedGrade and DraftGrade
if (submission == null)
{
response.StatusCode = StatusCodes.Status404NotFound;
response.StatusDescription = "Submission was not found.";
}
else
{
submission.AssignedGrade = arg.Result.Score * courseWork.MaxPoints;
submission.DraftGrade = submission.AssignedGrade;
var patchRequest = classroomService.Courses.CourseWork.StudentSubmissions.Patch
(
submission,
submission.CourseId,
submission.CourseWorkId,
submission.Id
);
patchRequest.UpdateMask = "AssignedGrade,DraftGrade";
await patchRequest.ExecuteAsync();
response.StatusDescription = $"Score={arg.Result.Score}, AssignedGrade={submission.AssignedGrade}.";
}
}
return(response);
}
