import random import string import os import stat from os.path import dirname, pardir, abspath, join, exists import datetime import collections import csv from django.http import HttpResponse from django.contrib.auth import login, logout, authenticate from django.shortcuts import render_to_response, get_object_or_404, redirect from django.template import RequestContext from django.http import Http404 from django.db.models import Sum, Max, Q from django.views.decorators.csrf import csrf_exempt from django.contrib.auth.decorators import login_required from taggit.models import Tag from itertools import chain import json # Local imports. from yaksh.models import Quiz, Question, QuestionPaper, QuestionSet, Course from yaksh.models import Profile, Answer, AnswerPaper, User, TestCase from yaksh.forms import UserRegisterForm, UserLoginForm, QuizForm,\ QuestionForm, RandomQuestionForm, TestCaseFormSet,\ QuestionFilterForm, CourseForm, ProfileForm from yaksh.xmlrpc_clients import code_server from settings import URL_ROOT from yaksh.models import AssignmentUpload # The directory where user data can be saved. OUTPUT_DIR = abspath(join(dirname(__file__), 'output')) def my_redirect(url): """An overridden redirect to deal with URL_ROOT-ing. See settings.py for details.""" return redirect(URL_ROOT + url) def my_render_to_response(template, context=None, **kwargs): """Overridden render_to_response. """ if context is None: context = {'URL_ROOT': URL_ROOT} else: context['URL_ROOT'] = URL_ROOT return render_to_response(template, context, **kwargs) def get_user_dir(user): """Return the output directory for the user.""" user_dir = join(OUTPUT_DIR, str(user.username)) if not exists(user_dir): os.mkdir(user_dir) # Make it rwx by others. os.chmod(user_dir, stat.S_IROTH | stat.S_IWOTH | stat.S_IXOTH | stat.S_IRUSR | stat.S_IWUSR | stat.S_IXUSR | stat.S_IRGRP | stat.S_IWGRP | stat.S_IXGRP) return user_dir def is_moderator(user): """Check if the user is having moderator rights""" if user.groups.filter(name='moderator').count() == 1: return True def has_profile(user): """ check if user has profile """ return True if hasattr(user, 'profile') else False def index(request): """The start page. """ user = request.user if user.is_authenticated(): if user.groups.filter(name='moderator').count() > 0: return my_redirect('/exam/manage/') return my_redirect("/exam/quizzes/") return my_redirect("/exam/login/") def user_register(request): """ Register a new user. Create a user and corresponding profile and store roll_number also.""" user = request.user ci = RequestContext(request) if user.is_authenticated(): return my_redirect("/exam/quizzes/") if request.method == "POST": form = UserRegisterForm(request.POST) if form.is_valid(): data = form.cleaned_data u_name, pwd = form.save() new_user = authenticate(username=u_name, password=pwd) login(request, new_user) return my_redirect("/exam/quizzes/") else: return my_render_to_response('yaksh/register.html', {'form': form}, context_instance=ci) else: form = UserRegisterForm() return my_render_to_response('yaksh/register.html', {'form': form}, context_instance=ci) @login_required def quizlist_user(request): """Show All Quizzes that is available to logged-in user.""" user = request.user avail_quizzes = Quiz.objects.get_active_quizzes() user_answerpapers = AnswerPaper.objects.filter(user=user) courses = Course.objects.filter(active=True) context = { 'quizzes': avail_quizzes, 'user': user, 'courses': courses, 'quizzes_taken': user_answerpapers, } return my_render_to_response("yaksh/quizzes_user.html", context) @login_required def results_user(request): """Show list of Results of Quizzes that is taken by logged-in user.""" user = request.user papers = AnswerPaper.objects.get_user_answerpapers(user) context = {'papers': papers} return my_render_to_response("yaksh/results_user.html", context) @login_required def add_question(request, question_id=None): """To add a new question in the database. Create a new question and store it.""" def add_or_delete_test_form(post_request, instance): request_copy = post_request.copy() if 'add_test' in post_request: request_copy['test-TOTAL_FORMS'] = int(request_copy['test-TOTAL_FORMS']) + 1 elif 'delete_test' in post_request: request_copy['test-TOTAL_FORMS'] = int(request_copy['test-TOTAL_FORMS']) - 1 test_case_formset = TestCaseFormSet(request_copy, prefix='test', instance=instance) return test_case_formset user = request.user ci = RequestContext(request) if not user.is_authenticated() or not is_moderator(user): raise Http404('You are not allowed to view this page!') if request.method == "POST": form = QuestionForm(request.POST) if form.is_valid(): if question_id is None: test_case_formset = add_or_delete_test_form(request.POST, form.save(commit=False)) if 'save_question' in request.POST: qtn = form.save(commit=False) test_case_formset = TestCaseFormSet(request.POST, prefix='test', instance=qtn) form.save() question = Question.objects.order_by("-id")[0] if test_case_formset.is_valid(): test_case_formset.save() else: return my_render_to_response('yaksh/add_question.html', {'form': form, 'formset': test_case_formset}, context_instance=ci) return my_redirect("/exam/manage/questions") return my_render_to_response('yaksh/add_question.html', {'form': form, 'formset': test_case_formset}, context_instance=ci) else: d = Question.objects.get(id=question_id) form = QuestionForm(request.POST, instance=d) test_case_formset = add_or_delete_test_form(request.POST, d) if 'save_question' in request.POST: qtn = form.save(commit=False) test_case_formset = TestCaseFormSet(request.POST, prefix='test', instance=qtn) form.save() question = Question.objects.get(id=question_id) if test_case_formset.is_valid(): test_case_formset.save() return my_redirect("/exam/manage/questions") return my_render_to_response('yaksh/add_question.html', {'form': form, 'formset': test_case_formset}, context_instance=ci) else: test_case_formset = TestCaseFormSet(prefix='test', instance=Question()) return my_render_to_response('yaksh/add_question.html', {'form': form, 'formset': test_case_formset}, context_instance=ci) else: if question_id is None: form = QuestionForm() test_case_formset = TestCaseFormSet(prefix='test', instance=Question()) return my_render_to_response('yaksh/add_question.html', {'form': form, 'formset': test_case_formset}, context_instance=ci) else: d = Question.objects.get(id=question_id) form = QuestionForm(instance=d) test_case_formset = TestCaseFormSet(prefix='test', instance=d) return my_render_to_response('yaksh/add_question.html', {'form': form, 'formset': test_case_formset}, context_instance=ci) @login_required def add_quiz(request, quiz_id=None): """To add a new quiz in the database. Create a new quiz and store it.""" user = request.user ci = RequestContext(request) if not is_moderator(user): raise Http404('You are not allowed to view this page!') if request.method == "POST": if quiz_id is None: form = QuizForm(request.POST, user=user) if form.is_valid(): form.save() return my_redirect("/exam/manage/designquestionpaper") else: quiz = Quiz.objects.get(id=quiz_id) form = QuizForm(request.POST, user=user, instance=quiz) if form.is_valid(): form.save() return my_redirect("/exam/manage/") return my_render_to_response('yaksh/add_quiz.html', {'form': form}, context_instance=ci) else: if quiz_id is None: form = QuizForm(user=user) else: quiz = Quiz.objects.get(id=quiz_id) form = QuizForm(user=user, instance=quiz) return my_render_to_response('yaksh/add_quiz.html', {'form': form}, context_instance=ci) @login_required def show_all_questionpapers(request, questionpaper_id=None): user = request.user ci = RequestContext(request) if not user.is_authenticated() or not is_moderator(user): raise Http404('You are not allowed to view this page!') if questionpaper_id is None: qu_papers = QuestionPaper.objects.all() context = {'papers': qu_papers} return my_render_to_response('yaksh/showquestionpapers.html', context, context_instance=ci) else: qu_papers = QuestionPaper.objects.get(id=questionpaper_id) quiz = qu_papers.quiz fixed_questions = qu_papers.fixed_questions.all() random_questions = qu_papers.random_questions.all() context = {'quiz': quiz, 'fixed_questions': fixed_questions, 'random_questions': random_questions} return my_render_to_response('yaksh/editquestionpaper.html', context, context_instance=ci) @login_required def prof_manage(request): """Take credentials of the user with professor/moderator rights/permissions and log in.""" user = request.user if user.is_authenticated() and is_moderator(user): question_papers = QuestionPaper.objects.filter(quiz__course__creator=user) users_per_paper = [] for paper in question_papers: answer_papers = AnswerPaper.objects.filter(question_paper=paper) users_passed = AnswerPaper.objects.filter(question_paper=paper, passed=True).count() users_failed = AnswerPaper.objects.filter(question_paper=paper, passed=False).count() temp = paper, answer_papers, users_passed, users_failed users_per_paper.append(temp) context = {'user': user, 'users_per_paper': users_per_paper} return my_render_to_response('manage.html', context) return my_redirect('/exam/login/') def user_login(request): """Take the credentials of the user and log the user in.""" user = request.user ci = RequestContext(request) if user.is_authenticated(): if user.groups.filter(name='moderator').count() > 0: return my_redirect('/exam/manage/') return my_redirect("/exam/quizzes/") if request.method == "POST": form = UserLoginForm(request.POST) if form.is_valid(): user = form.cleaned_data login(request, user) if user.groups.filter(name='moderator').count() > 0: return my_redirect('/exam/manage/') return my_redirect('/exam/login/') else: context = {"form": form} return my_render_to_response('yaksh/login.html', context, context_instance=ci) else: form = UserLoginForm() context = {"form": form} return my_render_to_response('yaksh/login.html', context, context_instance=ci) @login_required def start(request, questionpaper_id=None, attempt_num=None): """Check the user cedentials and if any quiz is available, start the exam.""" user = request.user ci = RequestContext(request) # check conditions try: quest_paper = QuestionPaper.objects.get(id=questionpaper_id) except QuestionPaper.DoesNotExist: msg = 'Quiz not found, please contact your '\ 'instructor/administrator. Please login again thereafter.' return complete(request, msg, attempt_num, questionpaper_id=None) if not quest_paper.quiz.course.is_enrolled(user) : raise Http404('You are not allowed to view this page!') # prerequisite check and passing criteria if quest_paper.quiz.has_prerequisite() and not quest_paper.is_prerequisite_passed(user): return quizlist_user(request) # if any previous attempt last_attempt = AnswerPaper.objects.get_user_last_attempt( questionpaper=quest_paper, user=user) if last_attempt and last_attempt.is_attempt_inprogress(): return show_question(request, last_attempt.current_question(), last_attempt) # allowed to start if not quest_paper.can_attempt_now(user): return quizlist_user(request) if attempt_num is None: attempt_number = 1 if not last_attempt else last_attempt.attempt_number +1 context = {'user': user, 'questionpaper': quest_paper, 'attempt_num': attempt_number} return my_render_to_response('yaksh/intro.html', context, context_instance=ci) else: ip = request.META['REMOTE_ADDR'] if not hasattr(user, 'profile'): msg = 'You do not have a profile and cannot take the quiz!' raise Http404(msg) new_paper = quest_paper.make_answerpaper(user, ip, attempt_num) # Make user directory. user_dir = get_user_dir(user) return show_question(request, new_paper.current_question(), new_paper) @login_required def show_question(request, question, paper, error_message=None): """Show a question if possible.""" user = request.user if not question: msg = 'Congratulations! You have successfully completed the quiz.' return complete(request, msg, paper.attempt_number, paper.question_paper.id) if not paper.question_paper.quiz.active: reason = 'The quiz has been deactivated!' return complete(request, reason, paper.attempt_number, paper.question_paper.id) if paper.time_left() <= 0: reason='Your time is up!' return complete(request, reason, paper.attempt_number, paper.question_paper.id) context = {'question': question, 'paper': paper, 'error_message': error_message} answers = paper.get_previous_answers(question) if answers: context['last_attempt'] = answers[0] ci = RequestContext(request) return my_render_to_response('yaksh/question.html', context, context_instance=ci) @login_required def skip(request, q_id, next_q=None, attempt_num=None, questionpaper_id=None): user = request.user paper = get_object_or_404(AnswerPaper, user=request.user, attempt_number=attempt_num, question_paper=questionpaper_id) question = get_object_or_404(Question, pk=q_id) if request.method == 'POST' and question.type == 'code': user_code = request.POST.get('answer') new_answer = Answer(question=question, answer=user_code, correct=False, skipped=True) new_answer.save() paper.answers.add(new_answer) if next_q is None: next_q = paper.skip(q_id) if paper.skip(q_id) else question else: next_q = get_object_or_404(Question, pk=next_q) return show_question(request, next_q, paper) @login_required def check(request, q_id, attempt_num=None, questionpaper_id=None): """Checks the answers of the user for particular question""" user = request.user paper = get_object_or_404(AnswerPaper, user=request.user, attempt_number=attempt_num, question_paper=questionpaper_id) question = get_object_or_404(Question, pk=q_id) if question in paper.questions_answered.all(): next_q = paper.skip(q_id) return show_question(request, next_q, paper) if request.method == 'POST': snippet_code = request.POST.get('snippet') # Add the answer submitted, regardless of it being correct or not. if question.type == 'mcq': user_answer = request.POST.get('answer') elif question.type == 'mcc': user_answer = request.POST.getlist('answer') elif question.type == 'upload': assign = AssignmentUpload() assign.user = user.profile assign.assignmentQuestion = question # if time-up at upload question then the form is submitted without # validation if 'assignment' in request.FILES: assign.assignmentFile = request.FILES['assignment'] assign.save() user_answer = 'ASSIGNMENT UPLOADED' next_q = paper.completed_question(question.id) return show_question(request, next_q, paper) else: user_code = request.POST.get('answer') user_answer = snippet_code + "\n" + user_code if snippet_code else user_code new_answer = Answer(question=question, answer=user_answer, correct=False) new_answer.save() paper.answers.add(new_answer) # If we were not skipped, we were asked to check. For any non-mcq # questions, we obtain the results via XML-RPC with the code executed # safely in a separate process (the code_server.py) running as nobody. test_cases = TestCase.objects.filter(question=question) json_data = question.consolidate_answer_data(test_cases, user_answer) \ if question.type == 'code' else None correct, result = validate_answer(user, user_answer, question, json_data) if correct: new_answer.correct = correct new_answer.marks = question.points new_answer.error = result.get('error') else: new_answer.error = result.get('error') new_answer.save() paper.update_marks('inprogress') if not result.get('success'): # Should only happen for non-mcq questions. new_answer.answer = user_code new_answer.save() return show_question(request, question, paper, result.get('error')) else: # Display the same question if user_answer is None if not user_answer: msg = "Please submit a valid option or code" return show_question(request, question, paper, msg) elif question.type == 'code' and user_answer: msg = "Correct Output" paper.completed_question(question.id) return show_question(request, question, paper, msg) else: next_q = paper.completed_question(question.id) return show_question(request, next_q, paper) else: return show_question(request, question, paper) def validate_answer(user, user_answer, question, json_data=None): """ Checks whether the answer submitted by the user is right or wrong. If right then returns correct = True, success and message = Correct answer. success is True for MCQ's and multiple correct choices because only one attempt are allowed for them. For code questions success is True only if the answer is correct. """ result = {'success': True, 'error': 'Incorrect answer'} correct = False if user_answer is not None: if question.type == 'mcq': if user_answer.strip() == question.test.strip(): correct = True message = 'Correct answer' elif question.type == 'mcc': answers = set(question.test.splitlines()) if set(user_answer) == answers: correct = True message = 'Correct answer' elif question.type == 'code': user_dir = get_user_dir(user) json_result = code_server.run_code(question.language, json_data, user_dir) result = json.loads(json_result) if result.get('success'): correct = True return correct, result def quit(request, reason=None, attempt_num=None, questionpaper_id=None): """Show the quit page when the user logs out.""" paper = AnswerPaper.objects.get(user=request.user, attempt_number=attempt_num, question_paper=questionpaper_id) context = {'paper': paper, 'message': reason} return my_render_to_response('yaksh/quit.html', context, context_instance=RequestContext(request)) @login_required def complete(request, reason=None, attempt_num=None, questionpaper_id=None): """Show a page to inform user that the quiz has been compeleted.""" user = request.user if questionpaper_id is None: logout(request) message = reason or "You are successfully logged out." context = {'message': message} return my_render_to_response('yaksh/complete.html', context) else: q_paper = QuestionPaper.objects.get(id=questionpaper_id) paper = AnswerPaper.objects.get(user=user, question_paper=q_paper, attempt_number=attempt_num) paper.update_marks() if paper.percent == 100: message = "You answered all the questions correctly.\ You have been logged out successfully,\ Thank You !" else: message = reason or "You are successfully logged out" context = {'message': message, 'paper': paper} return my_render_to_response('yaksh/complete.html', context) @login_required def add_course(request): user = request.user ci = RequestContext(request) if not is_moderator(user): raise Http404('You are not allowed to view this page') if request.method == 'POST': form = CourseForm(request.POST) if form.is_valid(): new_course = form.save(commit=False) new_course.creator = user new_course.save() return my_render_to_response('manage.html', {'course': new_course}) else: return my_render_to_response('yaksh/add_course.html', {'form': form}, context_instance=ci) else: form = CourseForm() return my_render_to_response('yaksh/add_course.html', {'form': form}, context_instance=ci) @login_required def enroll_request(request, course_id): user = request.user ci = RequestContext(request) course = get_object_or_404(Course, pk=course_id) course.request(user) return my_redirect('/exam/manage/') @login_required def self_enroll(request, course_id): user = request.user ci = RequestContext(request) course = get_object_or_404(Course, pk=course_id) if course.is_self_enroll(): was_rejected = False course.enroll(was_rejected, user) return my_redirect('/exam/manage/') @login_required def courses(request): user = request.user ci = RequestContext(request) if not is_moderator(user): raise Http404('You are not allowed to view this page') courses = Course.objects.filter(creator=user) return my_render_to_response('yaksh/courses.html', {'courses': courses}, context_instance=ci) @login_required def course_detail(request, course_id): user = request.user ci = RequestContext(request) course = Course.objects.filter(Q(creator=user)|Q(teachers=user), pk=course_id).first() if not is_moderator(user) or not course: raise Http404('You are not allowed to view this page') return my_render_to_response('yaksh/course_detail.html', {'course': course}, context_instance=ci) @login_required def enroll(request, course_id, user_id=None, was_rejected=False): user = request.user ci = RequestContext(request) if not is_moderator(user): raise Http404('You are not allowed to view this page') course = Course.objects.filter(Q(creator=user)|Q(teachers=user), pk=course_id).first() if request.method == 'POST': enroll_ids = request.POST.getlist('check') else: enroll_ids = user_id if not enroll_ids: return my_render_to_response('yaksh/course_detail.html', {'course': course}, context_instance=ci) users = User.objects.filter(id__in=enroll_ids) course.enroll(was_rejected, *users) return course_detail(request, course_id) @login_required def reject(request, course_id, user_id=None, was_enrolled=False): user = request.user ci = RequestContext(request) if not is_moderator(user): raise Http404('You are not allowed to view this page') course = Course.objects.filter(Q(creator=user)|Q(teachers=user), pk=course_id).first() if request.method == 'POST': reject_ids = request.POST.getlist('check') else: reject_ids = user_id if not reject_ids: return my_render_to_response('yaksh/course_detail.html', {'course': course}, context_instance=ci) users = User.objects.filter(id__in=reject_ids) course.reject(was_enrolled, *users) return course_detail(request, course_id) @login_required def toggle_course_status(request, course_id): user = request.user if not is_moderator(user): raise Http404('You are not allowed to view this page') course = Course.objects.filter(Q(creator=user)|Q(teachers=user), pk=course_id).first() if course.active: course.deactivate() else: course.activate() course.save() return course_detail(request, course_id) @login_required def show_statistics(request, questionpaper_id, attempt_number=None): user = request.user if not is_moderator(user): raise Http404('You are not allowed to view this page') attempt_numbers = AnswerPaper.objects.get_attempt_numbers(questionpaper_id) quiz = get_object_or_404(QuestionPaper, pk=questionpaper_id).quiz if attempt_number is None: context = {'quiz': quiz, 'attempts': attempt_numbers, 'questionpaper_id': questionpaper_id} return my_render_to_response('yaksh/statistics_question.html', context, context_instance=RequestContext(request)) total_attempt = AnswerPaper.objects.get_count(questionpaper_id, attempt_number) if not AnswerPaper.objects.has_attempt(questionpaper_id, attempt_number): return my_redirect('/exam/manage/') question_stats = AnswerPaper.objects.get_question_statistics( questionpaper_id, attempt_number ) context = {'question_stats': question_stats, 'quiz': quiz, 'questionpaper_id': questionpaper_id, 'attempts': attempt_numbers, 'total': total_attempt} return my_render_to_response('yaksh/statistics_question.html', context, context_instance=RequestContext(request)) @login_required def monitor(request, questionpaper_id=None): """Monitor the progress of the papers taken so far.""" user = request.user ci = RequestContext(request) if not user.is_authenticated() or not is_moderator(user): raise Http404('You are not allowed to view this page!') if questionpaper_id is None: q_paper = QuestionPaper.objects.filter(Q(quiz__course__creator=user)| Q(quiz__course__teachers=user)).distinct() context = {'papers': [], 'quiz': None, 'quizzes': q_paper} return my_render_to_response('yaksh/monitor.html', context, context_instance=ci) # quiz_id is not None. try: q_paper = QuestionPaper.objects.filter(Q(quiz__course__creator=user)| Q(quiz__course__teachers=user), id=questionpaper_id).distinct() except QuestionPaper.DoesNotExist: papers = [] q_paper = None latest_attempts = [] else: latest_attempts = [] papers = AnswerPaper.objects.filter(question_paper=q_paper).order_by( 'user__profile__roll_number') users = papers.values_list('user').distinct() for auser in users: last_attempt = papers.filter(user__in=auser).aggregate( last_attempt_num=Max('attempt_number')) latest_attempts.append(papers.get(user__in=auser, attempt_number=last_attempt['last_attempt_num'])) context = {'papers': papers, 'quiz': q_paper, 'quizzes': None, 'latest_attempts': latest_attempts,} return my_render_to_response('yaksh/monitor.html', context, context_instance=ci) def get_user_data(username, questionpaper_id=None): """For a given username, this returns a dictionary of important data related to the user including all the user's answers submitted. """ user = User.objects.get(username=username) papers = AnswerPaper.objects.filter(user=user) if questionpaper_id is not None: papers = papers.filter(question_paper_id=questionpaper_id).order_by( '-attempt_number') data = {} profile = user.profile if hasattr(user, 'profile') else None data['user'] = user data['profile'] = profile data['papers'] = papers data['questionpaperid'] = questionpaper_id return data @login_required def show_all_users(request): """Shows all the users who have taken various exams/quiz.""" user = request.user if not user.is_authenticated() or not is_moderator(user): raise Http404('You are not allowed to view this page !') user = User.objects.filter(username__contains="") questionpaper = AnswerPaper.objects.all() context = {'question': questionpaper} return my_render_to_response('yaksh/showusers.html', context, context_instance=RequestContext(request)) @csrf_exempt def ajax_questions_filter(request): """Ajax call made when filtering displayed questions.""" filter_dict = {} question_type = request.POST.get('question_type') marks = request.POST.get('marks') language = request.POST.get('language') if question_type != "select": filter_dict['type'] = str(question_type) if marks != "select": filter_dict['points'] = marks if language != "select": filter_dict['language'] = str(language) questions = list(Question.objects.filter(**filter_dict)) return my_render_to_response('yaksh/ajax_question_filter.html', {'questions': questions}) @login_required def show_all_questions(request): """Show a list of all the questions currently in the databse.""" user = request.user ci = RequestContext(request) if not user.is_authenticated() or not is_moderator(user): raise Http404("You are not allowed to view this page !") if request.method == 'POST' and request.POST.get('delete') == 'delete': data = request.POST.getlist('question') if data is not None: for i in data: question = Question.objects.get(id=i).delete() questions = Question.objects.all() form = QuestionFilterForm() context = {'papers': [], 'question': None, 'questions': questions, 'form': form } return my_render_to_response('yaksh/showquestions.html', context, context_instance=ci) @login_required def user_data(request, username, questionpaper_id=None): """Render user data.""" current_user = request.user if not current_user.is_authenticated() or not is_moderator(current_user): raise Http404('You are not allowed to view this page!') data = get_user_data(username, questionpaper_id) context = {'data': data} return my_render_to_response('yaksh/user_data.html', context, context_instance=RequestContext(request)) @login_required def download_csv(request, questionpaper_id): user = request.user if not is_moderator(user): raise Http404('You are not allowed to view this page!') quiz = Quiz.objects.get(questionpaper=questionpaper_id) if not quiz.course.is_creator(user) and not quiz.course.is_teacher(user): raise Http404('The question paper does not belong to your course') papers = AnswerPaper.objects.get_latest_attempts(questionpaper_id) if not papers: return monitor(request, questionpaper_id) response = HttpResponse(content_type='text/csv') response['Content-Disposition'] = 'attachment; filename="{0}.csv"'.format( (quiz.description).replace('.', '')) writer = csv.writer(response) header = [ 'name', 'username', 'roll_number', 'institute', 'marks_obtained', 'total_marks', 'percentage', 'questions', 'questions_answered', 'status' ] writer.writerow(header) for paper in papers: row = [ '{0} {1}'.format(paper.user.first_name, paper.user.last_name), paper.user.username, paper.user.profile.roll_number, paper.user.profile.institute, paper.marks_obtained, paper.question_paper.total_marks, paper.percent, paper.questions.all(), paper.questions_answered.all(), paper.status ] writer.writerow(row) return response @login_required def grade_user(request, username, questionpaper_id=None): """Present an interface with which we can easily grade a user's papers and update all their marks and also give comments for each paper. """ current_user = request.user ci = RequestContext(request) if not current_user.is_authenticated() or not is_moderator(current_user): raise Http404('You are not allowed to view this page!') data = get_user_data(username, questionpaper_id) if request.method == 'POST': papers = data['papers'] for paper in papers: for question, answers in paper.get_question_answers().iteritems(): marks = float(request.POST.get('q%d_marks' % question.id, 0)) last_ans = answers[-1] last_ans.marks = marks last_ans.save() paper.comments = request.POST.get( 'comments_%d' % paper.question_paper.id, 'No comments') paper.save() context = {'data': data} return my_render_to_response('yaksh/user_data.html', context, context_instance=ci) else: context = {'data': data} return my_render_to_response('yaksh/grade_user.html', context, context_instance=ci) @csrf_exempt def ajax_questionpaper(request, query): """ During question paper creation, ajax call made to get question details. """ if query == 'marks': question_type = request.POST.get('question_type') questions = Question.objects.filter(type=question_type) marks = questions.values_list('points').distinct() return my_render_to_response('yaksh/ajax_marks.html', {'marks': marks}) elif query == 'questions': question_type = request.POST['question_type'] marks_selected = request.POST['marks'] fixed_questions = request.POST.getlist('fixed_list[]') fixed_question_list = ",".join(fixed_questions).split(',') random_questions = request.POST.getlist('random_list[]') random_question_list = ",".join(random_questions).split(',') question_list = fixed_question_list + random_question_list questions = list(Question.objects.filter(type=question_type, points=marks_selected)) questions = [question for question in questions \ if not str(question.id) in question_list] return my_render_to_response('yaksh/ajax_questions.html', {'questions': questions}) @login_required def design_questionpaper(request): user = request.user ci = RequestContext(request) if not is_moderator(user): raise Http404('You are not allowed to view this page!') if request.method == 'POST': fixed_questions = request.POST.getlist('fixed') random_questions = request.POST.getlist('random') random_number = request.POST.getlist('number') is_shuffle = request.POST.get('shuffle_questions', False) if is_shuffle == 'on': is_shuffle = True question_paper = QuestionPaper(shuffle_questions=is_shuffle) quiz = Quiz.objects.order_by("-id")[0] tot_marks = 0 question_paper.quiz = quiz question_paper.total_marks = tot_marks question_paper.save() if fixed_questions: fixed_questions_ids = ",".join(fixed_questions) fixed_questions_ids_list = fixed_questions_ids.split(',') for question_id in fixed_questions_ids_list: question_paper.fixed_questions.add(question_id) if random_questions: for random_question, num in zip(random_questions, random_number): qid = random_question.split(',')[0] question = Question.objects.get(id=int(qid)) marks = question.points question_set = QuestionSet(marks=marks, num_questions=num) question_set.save() for question_id in random_question.split(','): question_set.questions.add(question_id) question_paper.random_questions.add(question_set) question_paper.update_total_marks() question_paper.save() return my_redirect('/exam/manage/courses') else: form = RandomQuestionForm() context = {'form': form, 'questionpaper':True} return my_render_to_response('yaksh/design_questionpaper.html', context, context_instance=ci) @login_required def view_profile(request): """ view moderators and users profile """ user = request.user ci = RequestContext(request) context = {} if has_profile(user): return my_render_to_response('yaksh/view_profile.html', {'user':user}) else: form = ProfileForm(user=user) msg = True context['form'] = form context['msg'] = msg return my_render_to_response('yaksh/editprofile.html', context, context_instance=ci) @login_required def edit_profile(request): """ edit profile details facility for moderator and students """ context = {} user = request.user ci = RequestContext(request) if has_profile(user): profile = Profile.objects.get(user_id=user.id) else: profile = None if request.method == 'POST': form = ProfileForm(request.POST, user=user, instance=profile) if form.is_valid(): form_data = form.save(commit=False) form_data.user = user form_data.user.first_name = request.POST['first_name'] form_data.user.last_name = request.POST['last_name'] form_data.user.save() form_data.save() return my_render_to_response('yaksh/profile_updated.html', context_instance=ci) else: context['form'] = form return my_render_to_response('yaksh/editprofile.html', context, context_instance=ci) else: form = ProfileForm(user=user, instance=profile) context['form'] = form return my_render_to_response('yaksh/editprofile.html', context, context_instance=ci) @login_required def search_teacher(request, course_id): """ search teachers for the course """ user = request.user ci = RequestContext(request) if not is_moderator(user): raise Http404('You are not allowed to view this page!') context = {} course = get_object_or_404(Course, creator=user, pk=course_id) context['course'] = course if request.method == 'POST': u_name = request.POST.get('uname') if len(u_name) == 0: return my_render_to_response('yaksh/addteacher.html', context, context_instance=ci) else: teachers = User.objects.filter(Q(username__icontains=u_name)| Q(first_name__icontains=u_name)|Q(last_name__icontains=u_name)| Q(email__icontains=u_name)).exclude(Q(id=user.id)|Q(is_superuser=1)) context['success'] = True context['teachers'] = teachers return my_render_to_response('yaksh/addteacher.html', context, context_instance=ci) else: return my_render_to_response('yaksh/addteacher.html', context, context_instance=ci) @login_required def add_teacher(request, course_id): """ add teachers to the course """ user = request.user ci = RequestContext(request) if not is_moderator(user): raise Http404('You are not allowed to view this page!') context = {} course = get_object_or_404(Course, creator=user, pk=course_id) context['course'] = course if request.method == 'POST': teacher_ids = request.POST.getlist('check') teachers = User.objects.filter(id__in=teacher_ids) teachers_added, teachers_rejected = course.add_teachers(*teachers) context['status'] = True context['teachers_added'] = teachers_added context['teachers_rejected'] = teachers_rejected return my_render_to_response('yaksh/addteacher.html', context, context_instance=ci) else: return my_render_to_response('yaksh/addteacher.html', context, context_instance=ci) @login_required def allotted_courses(request): """ show courses allotted to a user """ user = request.user ci = RequestContext(request) if not is_moderator(user): raise Http404('You are not allowed to view this page!') courses = Course.objects.filter(teachers=user) return my_render_to_response('yaksh/courses.html', {'courses': courses}, context_instance=ci) @login_required def remove_teachers(request, course_id): """ remove user from a course """ user = request.user if not is_moderator(user): raise Http404('You are not allowed to view this page!') course = get_object_or_404(Course, creator=user, pk=course_id) if request.method == "POST": teacher_ids = request.POST.getlist('remove') teachers = User.objects.filter(id__in=teacher_ids) course.remove_teachers(*teachers) return my_redirect('/exam/manage/courses')