private static dynamic GetCorrection(Submission s, AllAttempts attempts, IList <Question> questions, GradingRules rules,
out string name)
{
Attempt attempt = attempts.GetAttempt(s.UserId, s.Attempt);
name = attempt.UserName;
JObject questionsObj = null;
foreach (Question q in questions)
{
Answer realAnswer = attempt.GetAnswer(q.Id);
Answer ruleAnswer = rules.GetAnswer(q.Id, realAnswer.Text);
if (realAnswer.Points != ruleAnswer.Points || ruleAnswer.Comment.Length > 0)
{
if (questionsObj == null)
{
questionsObj = new JObject();
}
JObject change = new JObject();
if (realAnswer.Points != ruleAnswer.Points)
{
change["score"] = ruleAnswer.Points;
}
if (ruleAnswer.Comment.Length > 0)
{
change["comment"] = ruleAnswer.Comment;
}
questionsObj[q.Id.ToString()] = change;
}
}
if (questionsObj != null)
{
JObject correction = new JObject();
JArray items = new JArray();
correction["quiz_submissions"] = items;
JObject attemptObj = new JObject();
items.Add(attemptObj);
attemptObj["attempt"] = s.Attempt;
attemptObj["questions"] = questionsObj;
return(correction);
}
else
{
return(null);
}
}
private static AllAttempts GetAllAttempts(List <Question> questions)
{
using (HttpClient client = CanvasHttp.MakeClient())
{
string url = String.Format("/api/v1/courses/{0}/quizzes/{1}/reports", Auth.COURSE_ID, quizID);
var inputs = new Dictionary <string, string>();
inputs["quiz_report[report_type]"] = "student_analysis";
inputs["quiz_report[includes_all_versions]"] = "true";
while (true)
{
var content = new FormUrlEncodedContent(inputs);
HttpResponseMessage response = client.PostAsync(url, content).Result;
if (response.IsSuccessStatusCode)
{
dynamic qs = JObject.Parse(response.Content.ReadAsStringAsync().Result);
if (qs.file != null)
{
using (StreamReader reader = new StreamReader(WebRequest.Create(qs.file.url.ToString()).GetResponse().GetResponseStream()))
{
using (CsvReader parser = new CsvReader(reader))
{
AllAttempts attempts = new AllAttempts(parser, questions);
return(attempts);
}
}
}
else
{
Console.WriteLine("Waiting for quiz report to be generated by Canvas...");
Thread.Sleep(1000);
}
}
else if (response.StatusCode == HttpStatusCode.Conflict)
{
Console.WriteLine("Waiting for quiz report to be generated by Canvas...");
Thread.Sleep(1000);
}
else
{
Console.WriteLine("Error: " + response.StatusCode);
Console.WriteLine(response.ReasonPhrase.ToString());
Console.WriteLine("Unable to obtain quiz analysis");
throw new Exception();
}
}
}
}
public GradingRules(List <Question> questions, AllAttempts allAttempts)
{
answerMap = new Dictionary <int, SortedSet <Answer> >();
foreach (Question question in questions)
{
answerMap[question.Id] = new SortedSet <Answer>();
}
foreach (Attempt attempt in allAttempts.GetAttempts())
{
Count++;
foreach (Question question in questions)
{
Answer answer = attempt.GetAnswer(question.Id);
if (answer.Text.Length > 0)
{
answerMap[question.Id].Add(answer);
}
}
}
}
public static void GetAnswers()
{
// Get the short-answer questions that appear on the quiz
List <Question> questions = GetQuestions();
Console.WriteLine(questions.Count + " short answer questions found");
// Get information about all submissions to the quiz
AllAttempts allAttempts = GetAllAttempts(questions);
Console.WriteLine(allAttempts.Count + " attempts found");
// Organize into grading rules
GradingRules rules = new GradingRules(questions, allAttempts);
// Write the information to a CSV
Console.Write("Write results to " + GetQuizFilename() + "? [y/n] ");
if (Console.ReadLine().Trim().ToLower() == "y")
{
WriteAnalysis(questions, rules);
}
}
public static void SetScores()
{
// Get information about all of the short answer questions that appear on the quiz
List <Question> questions = GetQuestions();
Console.WriteLine(questions.Count + " short answer questions found");
// Get information about all submissions to the quiz
List <Submission> submissions = GetSubmissions();
Console.WriteLine(submissions.Count + " submissions found");
// Get information about attempts
AllAttempts attempts = GetAllAttempts(questions);
Console.WriteLine(attempts.Count + " attempts found");
// Read the grading rules for this quiz
GradingRules rules;
using (var input = new CsvReader(new StreamReader(@"..\..\" + GetQuizFilename())))
{
rules = new GradingRules(input);
}
Console.WriteLine(GetQuizFilename() + " is based on " + rules.Count + " attempts");
// Warn the user
int delta = attempts.Count - rules.Count;
if (delta != 0)
{
Console.WriteLine("There have " + delta + " attempts since " + GetQuizFilename() + " was created");
Console.WriteLine("You should recreate that file");
}
// Make sure we proceed
Console.Write("Update grades in Canvas? [y/n] ");
if (Console.ReadLine().Trim().ToLower() != "y")
{
return;
}
// Change the grade of attempt if necessary
foreach (Attempt attempt in attempts.GetAttempts())
{
Submission submission = GetSubmission(submissions, attempt.UserID, attempt.Number);
dynamic correction = GetCorrection(attempt, questions, rules, out string name);
if (correction == null)
{
Console.WriteLine("unchanged (v" + attempt.Number + ") " + name);
}
else if (submission == null)
{
Console.WriteLine("*MISSING* (v" + attempt.Number + ") " + name);
}
else
{
using (HttpClient client = CanvasHttp.MakeClient())
{
String url = String.Format("/api/v1/courses/{0}/quizzes/{1}/submissions/{2} ", Auth.COURSE_ID, quizID, submission.Id);
var content = new StringContent(correction.ToString(), Encoding.UTF8, "application/json");
HttpResponseMessage response = client.PutAsync(url, content).Result;
//HttpResponseMessage response = new HttpResponseMessage(HttpStatusCode.OK);
if (response.IsSuccessStatusCode)
{
Console.WriteLine("updated (v" + attempt.Number + ") " + name);
}
else
{
Console.WriteLine("*FAILED* (v" + attempt.Number + ") " + name + " " + response.StatusCode);
return;
}
}
}
}
}
