private async Task <ReadResultResponse> ReadResultAsync(ReadResultRequest request)
{
var response = new ReadResultResponse();
var ltiRequest = await Request.ParseLtiRequestAsync();
var signature = ltiRequest.GenerateSignature("secret");
if (!ltiRequest.Signature.Equals(signature))
{
response.StatusCode = StatusCodes.Status401Unauthorized;
return(response);
}
response.Result = _result;
return(response);
}
private async Task <ReadResultResponse> ReadResultAsync(ReadResultRequest arg)
{
var response = new ReadResultResponse();
var ltiRequest = await Request.ParseLtiRequestAsync();
var signature = ltiRequest.GenerateSignature("secret");
if (!ltiRequest.Signature.Equals(signature))
{
response.StatusCode = StatusCodes.Status401Unauthorized;
return(response);
}
// Read the grade from Google Classroom
try
{
var lisResultSourcedId = JsonConvert.DeserializeObject <LisResultSourcedId>(arg.LisResultSourcedId);
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);
var credential = new UserCredential(appFlow.Flow, googleUser.UserId, token);
using (var classroomService = new ClassroomService(new BaseClientService.Initializer
{
HttpClientInitializer = credential,
ApplicationName = "gc2lti"
}))
{
var courseWorkRequest = classroomService.Courses.CourseWork.Get
(
lisResultSourcedId.CourseId,
lisResultSourcedId.CourseWorkId
);
var courseWork = await courseWorkRequest.ExecuteAsync();
var submissionsRequest = classroomService.Courses.CourseWork.StudentSubmissions.List
(
lisResultSourcedId.CourseId,
lisResultSourcedId.CourseWorkId
);
submissionsRequest.UserId = lisResultSourcedId.StudentId;
var submissionsResponse = await submissionsRequest.ExecuteAsync();
var submission = submissionsResponse.StudentSubmissions.FirstOrDefault();
if (submission == null)
{
response.StatusCode = StatusCodes.Status404NotFound;
response.StatusDescription = "Submission was found.";
}
else
{
response.Result = new Result
{
SourcedId = arg.LisResultSourcedId,
Score = submission.AssignedGrade / courseWork.MaxPoints
};
response.StatusDescription = $"Score={response.Result.Score}, AssignedGrade={submission.AssignedGrade}.";
}
}
}
catch (Exception)
{
response.StatusCode = StatusCodes.Status500InternalServerError;
}
return(response);
}