import random import string import os from datetime import datetime, timedelta import collections import csv from django.http import HttpResponse from django.core.urlresolvers import reverse 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, F from django.views.decorators.csrf import csrf_exempt from django.contrib.auth.decorators import login_required from django.contrib.auth.models import Group from django.forms.models import inlineformset_factory from django.utils import timezone from django.core.exceptions import MultipleObjectsReturned, ObjectDoesNotExist from django.conf import settings import pytz from taggit.models import Tag from itertools import chain import json import six from textwrap import dedent import zipfile try: from StringIO import StringIO as string_io except ImportError: from io import BytesIO as string_io # Local imports. from yaksh.models import get_model_class, Quiz, Question, QuestionPaper, QuestionSet, Course from yaksh.models import Profile, Answer, AnswerPaper, User, TestCase, FileUpload,\ has_profile, StandardTestCase, McqTestCase,\ StdIOBasedTestCase, HookTestCase, IntegerTestCase,\ FloatTestCase, StringTestCase from yaksh.forms import UserRegisterForm, UserLoginForm, QuizForm,\ QuestionForm, RandomQuestionForm,\ QuestionFilterForm, CourseForm, ProfileForm, UploadFileForm,\ get_object_form, FileForm, QuestionPaperForm from .settings import URL_ROOT from yaksh.models import AssignmentUpload from .file_utils import extract_files from .send_emails import send_user_mail, generate_activation_key from .decorators import email_verified 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 is_moderator(user): """Check if the user is having moderator rights""" if user.groups.filter(name='moderator').exists(): return True def add_to_group(users): """ add users to moderator group """ group = Group.objects.get(name="moderator") for user in users: if not is_moderator(user): user.groups.add(group) @email_verified def index(request, next_url=None): """The start page. """ user = request.user if user.is_authenticated(): if is_moderator(user): return my_redirect('/exam/manage/' if not next_url else next_url) return my_redirect("/exam/quizzes/" if not next_url else next_url) 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/") context = {} if request.method == "POST": form = UserRegisterForm(request.POST) if form.is_valid(): data = form.cleaned_data u_name, pwd, user_email, key = form.save() new_user = authenticate(username=u_name, password=pwd) login(request, new_user) if user_email and key: success, msg = send_user_mail(user_email, key) context = {'activation_msg': msg} return my_render_to_response('yaksh/activation_status.html', context) return index(request) 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) def user_logout(request): """Show a page to inform user that the quiz has been compeleted.""" logout(request) context = {'message': "You have been logged out successfully"} return my_render_to_response('yaksh/complete.html', context) @login_required @email_verified def quizlist_user(request, enrolled=None): """Show All Quizzes that is available to logged-in user.""" user = request.user ci = RequestContext(request) if request.method == "POST": course_code = request.POST.get('course_code') hidden_courses = Course.objects.get_hidden_courses(code=course_code) courses = hidden_courses if hidden_courses else None title = 'Search' elif enrolled is not None: courses = user.students.all() title = 'Enrolled Courses' else: courses = Course.objects.filter(active=True, is_trial=False, hidden=False) title = 'All Courses' context = {'user': user, 'courses': courses, 'title': title} return my_render_to_response("yaksh/quizzes_user.html", context, context_instance=ci) @login_required @email_verified 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 @email_verified def add_question(request, question_id=None): user = request.user ci = RequestContext(request) test_case_type = None if question_id is None: question = Question(user=user) question.save() else: question = Question.objects.get(id=question_id) if request.method == "POST" and 'delete_files' in request.POST: remove_files_id = request.POST.getlist('clear') if remove_files_id: files = FileUpload.objects.filter(id__in=remove_files_id) for file in files: file.remove() if request.method == 'POST': qform = QuestionForm(request.POST, instance=question) fileform = FileForm(request.POST, request.FILES) files = request.FILES.getlist('file_field') extract_files_id = request.POST.getlist('extract') hide_files_id = request.POST.getlist('hide') if files: for file in files: FileUpload.objects.get_or_create(question=question, file=file) if extract_files_id: files = FileUpload.objects.filter(id__in=extract_files_id) for file in files: file.set_extract_status() if hide_files_id: files = FileUpload.objects.filter(id__in=hide_files_id) for file in files: file.toggle_hide_status() formsets = [] for testcase in TestCase.__subclasses__(): formset = inlineformset_factory(Question, testcase, extra=0, fields='__all__') formsets.append(formset(request.POST, request.FILES, instance=question)) files = request.FILES.getlist('file_field') uploaded_files = FileUpload.objects.filter(question_id=question.id) if qform.is_valid(): question = qform.save(commit=False) question.user = user question.save() # many-to-many field save function used to save the tags qform.save_m2m() for formset in formsets: if formset.is_valid(): formset.save() test_case_type = request.POST.get('case_type', None) else: context = {'qform': qform, 'fileform': fileform, 'question': question, 'formsets': formsets, 'uploaded_files': uploaded_files} return my_render_to_response("yaksh/add_question.html", context, context_instance=ci) qform = QuestionForm(instance=question) fileform = FileForm() uploaded_files = FileUpload.objects.filter(question_id=question.id) formsets = [] for testcase in TestCase.__subclasses__(): if test_case_type == testcase.__name__.lower(): formset = inlineformset_factory(Question, testcase, extra=1, fields='__all__') else: formset = inlineformset_factory(Question, testcase, extra=0, fields='__all__') formsets.append(formset(instance=question)) context = {'qform': qform, 'fileform': fileform, 'question': question, 'formsets': formsets, 'uploaded_files': uploaded_files} return my_render_to_response("yaksh/add_question.html", context, context_instance=ci) @login_required @email_verified def add_quiz(request, course_id, quiz_id=None): """To add a new quiz in the database. Create a new quiz and store it.""" user = request.user course = get_object_or_404(Course, pk=course_id) ci = RequestContext(request) if not is_moderator(user) or (user != course.creator and user not in course.teachers.all()): raise Http404('You are not allowed to view this course !') context = {} if request.method == "POST": if quiz_id is None: form = QuizForm(request.POST, user=user, course=course_id) if form.is_valid(): form.save() return my_redirect("/exam/manage/courses/") else: context["form"] = form return my_render_to_response('yaksh/add_quiz.html', context, context_instance=ci) else: quiz = Quiz.objects.get(id=quiz_id) form = QuizForm(request.POST, user=user, course=course_id, instance=quiz) if form.is_valid(): form.save() context["quiz_id"] = quiz_id return my_redirect("/exam/manage/courses/") else: if quiz_id is None: form = QuizForm(course=course_id, user=user) else: quiz = Quiz.objects.get(id=quiz_id) form = QuizForm(user=user,course=course_id, instance=quiz) context["quiz_id"] = quiz_id context["form"] = form return my_render_to_response('yaksh/add_quiz.html', context, context_instance=ci) @login_required @email_verified 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.filter(is_trial=False) 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.get_ordered_questions() 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 @email_verified def prof_manage(request, msg=None): """Take credentials of the user with professor/moderator rights/permissions and log in.""" user = request.user ci = RequestContext(request) if user.is_authenticated() and is_moderator(user): question_papers = QuestionPaper.objects.filter( Q(quiz__course__creator=user) | Q(quiz__course__teachers=user), quiz__is_trial=False ).distinct() trial_paper = AnswerPaper.objects.filter(user=user, question_paper__quiz__is_trial=True ) if request.method == "POST": delete_paper = request.POST.getlist('delete_paper') for answerpaper_id in delete_paper: answerpaper = AnswerPaper.objects.get(id=answerpaper_id) qpaper = answerpaper.question_paper if qpaper.quiz.course.is_trial == True: qpaper.quiz.course.delete() else: if qpaper.answerpaper_set.count() == 1: qpaper.quiz.delete() else: answerpaper.delete() 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, 'trial_paper': trial_paper, 'msg': msg } return my_render_to_response('yaksh/moderator_dashboard.html', context, context_instance=ci) 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) context = {} if user.is_authenticated(): return index(request) next_url = request.GET.get('next') if request.method == "POST": form = UserLoginForm(request.POST) if form.is_valid(): user = form.cleaned_data login(request, user) return index(request, next_url) else: context = {"form": form} else: form = UserLoginForm() context = {"form": form} return my_render_to_response('yaksh/login.html', context, context_instance=ci) @login_required @email_verified 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.' return complete(request, msg, attempt_num, questionpaper_id=None) if not quest_paper.get_ordered_questions() and not \ quest_paper.random_questions.all(): msg = 'Quiz does not have Questions, please contact your '\ 'instructor/administrator.' 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.is_expired(): if is_moderator(user): return redirect("/exam/manage") return redirect("/exam/quizzes") if quest_paper.quiz.has_prerequisite() and not quest_paper.is_prerequisite_passed(user): if is_moderator(user): return redirect("/exam/manage") return redirect("/exam/quizzes") # 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): if is_moderator(user): return redirect("/exam/manage") return redirect("/exam/quizzes") 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} if is_moderator(user): context["user"] = "moderator" 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) return show_question(request, new_paper.current_question(), new_paper) @login_required @email_verified def show_question(request, question, paper, error_message=None, notification=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) if question in paper.questions_answered.all(): notification = 'You have already attempted this question successfully' \ if question.type == "code" else \ 'You have already attempted this question' test_cases = question.get_test_cases() files = FileUpload.objects.filter(question_id=question.id, hide=False) context = {'question': question, 'paper': paper, 'error_message': error_message, 'test_cases': test_cases, 'files': files, 'notification': notification, 'last_attempt': question.snippet.encode('unicode-escape')} answers = paper.get_previous_answers(question) if answers: last_attempt = answers[0].answer context['last_attempt'] = last_attempt.encode('unicode-escape') ci = RequestContext(request) return my_render_to_response('yaksh/question.html', context, context_instance=ci) @login_required @email_verified 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, error=json.dumps([])) new_answer.save() paper.answers.add(new_answer) if next_q is not None: next_q = get_object_or_404(Question, pk=next_q) else: next_q = paper.next_question(q_id) return show_question(request, next_q, paper) @login_required @email_verified 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) current_question = get_object_or_404(Question, pk=q_id) if request.method == 'POST': snippet_code = request.POST.get('snippet') # Add the answer submitted, regardless of it being correct or not. if current_question.type == 'mcq': user_answer = request.POST.get('answer') elif current_question.type == 'integer': try: user_answer = int(request.POST.get('answer')) except ValueError: msg = "Please enter an Integer Value" return show_question(request, current_question, paper, notification=msg ) elif current_question.type == 'float': try: user_answer = float(request.POST.get('answer')) except ValueError: msg = "Please enter a Float Value" return show_question(request, current_question, paper, notification=msg) elif current_question.type == 'string': user_answer = str(request.POST.get('answer')) elif current_question.type == 'mcc': user_answer = request.POST.getlist('answer') elif current_question.type == 'upload': # if time-up at upload question then the form is submitted without # validation assignment_filename = request.FILES.getlist('assignment') if not assignment_filename: msg = "Please upload assignment file" return show_question(request, current_question, paper, notification=msg) for fname in assignment_filename: assignment_files = AssignmentUpload.objects.filter( assignmentQuestion=current_question, assignmentFile__icontains=fname, user=user, question_paper=questionpaper_id) if assignment_files.exists(): assign_file = assignment_files.get( assignmentQuestion=current_question, assignmentFile__icontains=fname, user=user, question_paper=questionpaper_id) os.remove(assign_file.assignmentFile.path) assign_file.delete() AssignmentUpload.objects.create(user=user, assignmentQuestion=current_question, assignmentFile=fname, question_paper_id=questionpaper_id ) user_answer = 'ASSIGNMENT UPLOADED' if not current_question.grade_assignment_upload: new_answer = Answer(question=current_question, answer=user_answer, correct=False, error=json.dumps([])) new_answer.save() paper.answers.add(new_answer) next_q = paper.add_completed_question(current_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 if not user_answer: msg = ["Please submit a valid option or code"] return show_question(request, current_question, paper, notification=msg) new_answer = Answer(question=current_question, answer=user_answer, correct=False, error=json.dumps([])) 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. json_data = current_question.consolidate_answer_data(user_answer, user) \ if current_question.type == 'code' or \ current_question.type == 'upload' else None result = paper.validate_answer(user_answer, current_question, json_data ) if result.get('success'): new_answer.marks = (current_question.points * result['weight'] / current_question.get_maximum_test_case_weight()) \ if current_question.partial_grading and \ current_question.type == 'code' or current_question.type == 'upload' \ else current_question.points new_answer.correct = result.get('success') error_message = None new_answer.error = json.dumps(result.get('error')) next_question = paper.add_completed_question(current_question.id) else: new_answer.marks = (current_question.points * result['weight'] / current_question.get_maximum_test_case_weight()) \ if current_question.partial_grading and \ current_question.type == 'code' or current_question.type == 'upload' \ else 0 error_message = result.get('error') if current_question.type == 'code' \ or current_question.type == 'upload' else None new_answer.error = json.dumps(result.get('error')) next_question = current_question if current_question.type == 'code' \ or current_question.type == 'upload' \ else paper.add_completed_question(current_question.id) new_answer.save() paper.update_marks('inprogress') paper.set_end_time(timezone.now()) return show_question(request, next_question, paper, error_message) else: return show_question(request, current_question, paper) 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 @email_verified 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: message = reason or "An Unexpected Error occurred. Please contact your '\ 'instructor/administrator.'" 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() paper.set_end_time(timezone.now()) message = reason or "Quiz has been submitted" context = {'message': message, 'paper': paper} return my_render_to_response('yaksh/complete.html', context) @login_required @email_verified def add_course(request, course_id=None): user = request.user ci = RequestContext(request) if course_id: course = Course.objects.get(id=course_id) else: course = None if not is_moderator(user): raise Http404('You are not allowed to view this page') if request.method == 'POST': form = CourseForm(request.POST, instance=course) if form.is_valid(): new_course = form.save(commit=False) new_course.creator = user new_course.save() return my_redirect('/exam/manage/') else: return my_render_to_response('yaksh/add_course.html', {'form': form}, context_instance=ci) else: form = CourseForm(instance=course) return my_render_to_response('yaksh/add_course.html', {'form': form}, context_instance=ci) @login_required @email_verified def enroll_request(request, course_id): user = request.user ci = RequestContext(request) course = get_object_or_404(Course, pk=course_id) if not course.is_active_enrollment and course.hidden: msg = 'Unable to add enrollments for this course, please contact your '\ 'instructor/administrator.' return complete(request, msg, attempt_num=None, questionpaper_id=None) course.request(user) if is_moderator(user): return my_redirect('/exam/manage/courses') else: return my_redirect('/exam/quizzes/') @login_required @email_verified 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) if is_moderator(user): return my_redirect('/exam/manage/') else: return my_redirect('/exam/quizzes/') @login_required @email_verified 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, is_trial=False) allotted_courses = Course.objects.filter(teachers=user, is_trial=False) context = {'courses': courses, "allotted_courses": allotted_courses} return my_render_to_response('yaksh/courses.html', context, context_instance=ci) @login_required @email_verified def course_detail(request, course_id): user = request.user ci = RequestContext(request) if not is_moderator(user): raise Http404('You are not allowed to view this page') course = get_object_or_404(Course, pk=course_id) if not course.is_creator(user) and not course.is_teacher(user): raise Http404('This course does not belong to you') return my_render_to_response('yaksh/course_detail.html', {'course': course}, context_instance=ci) @login_required @email_verified 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 = get_object_or_404(Course, pk=course_id) if not course.is_active_enrollment: msg = 'Enrollment for this course has been closed, please contact your '\ 'instructor/administrator.' return complete(request, msg, attempt_num=None, questionpaper_id=None) if not course.is_creator(user) and not course.is_teacher(user): raise Http404('This course does not belong to you') 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 @email_verified 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 = get_object_or_404(Course, pk=course_id) if not course.is_creator(user) and not course.is_teacher(user): raise Http404('This course does not belong to you') 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 @email_verified 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 = get_object_or_404(Course, pk=course_id) if not course.is_creator(user) and not course.is_teacher(user): raise Http404('This course does not belong to you') if course.active: course.deactivate() else: course.activate() course.save() return course_detail(request, course_id) @login_required @email_verified 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 @email_verified def monitor(request, quiz_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 quiz_id is None: course_details = Course.objects.filter(Q(creator=user) | Q(teachers=user), is_trial=False).distinct() context = {'papers': [], "course_details": course_details, "msg": "Monitor"} return my_render_to_response('yaksh/monitor.html', context, context_instance=ci) # quiz_id is not None. try: quiz = get_object_or_404(Quiz, id=quiz_id) if not quiz.course.is_creator(user) and not quiz.course.is_teacher(user): raise Http404('This course does not belong to you') q_paper = QuestionPaper.objects.filter(Q(quiz__course__creator=user) | Q(quiz__course__teachers=user), quiz__is_trial=False, quiz_id=quiz_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": quiz, "msg": "Quiz Results", 'latest_attempts': latest_attempts} return my_render_to_response('yaksh/monitor.html', context, context_instance=ci) @csrf_exempt def ajax_questions_filter(request): """Ajax call made when filtering displayed questions.""" user = request.user filter_dict = {"user_id": user.id, "active": True} 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}) def _get_questions(user, question_type, marks): if question_type is None and marks is None: return None if question_type: questions = Question.objects.filter(type=question_type, user=user, active=True ) if marks: questions = questions.filter(points=marks) return questions def _remove_already_present(questionpaper_id, questions): if questionpaper_id is None: return questions questionpaper = QuestionPaper.objects.get(pk=questionpaper_id) questions = questions.exclude( id__in=questionpaper.fixed_questions.values_list('id', flat=True)) for random_set in questionpaper.random_questions.all(): questions = questions.exclude( id__in=random_set.questions.values_list('id', flat=True)) return questions @login_required @email_verified def design_questionpaper(request, quiz_id, questionpaper_id=None): user = request.user if not is_moderator(user): raise Http404('You are not allowed to view this page!') quiz = Quiz.objects.get(id=quiz_id) if not quiz.course.is_creator(user) and not quiz.course.is_teacher(user): raise Http404('This course does not belong to you') filter_form = QuestionFilterForm(user=user) questions = None marks = None state = None if questionpaper_id is None: question_paper = QuestionPaper.objects.get_or_create(quiz_id=quiz_id)[0] else: question_paper = get_object_or_404(QuestionPaper, id=questionpaper_id) qpaper_form = QuestionPaperForm(instance=question_paper) if request.method == 'POST': filter_form = QuestionFilterForm(request.POST, user=user) qpaper_form = QuestionPaperForm(request.POST, instance=question_paper) question_type = request.POST.get('question_type', None) marks = request.POST.get('marks', None) state = request.POST.get('is_active', None) if 'add-fixed' in request.POST: question_ids = request.POST.get('checked_ques', None) if question_paper.fixed_question_order: ques_order = question_paper.fixed_question_order.split(",") +\ question_ids.split(",") questions_order = ",".join(ques_order) else: questions_order = question_ids questions = Question.objects.filter(id__in=question_ids.split(',')) question_paper.fixed_question_order = questions_order question_paper.save() question_paper.fixed_questions.add(*questions) if 'remove-fixed' in request.POST: question_ids = request.POST.getlist('added-questions', None) if question_paper.fixed_question_order: que_order = question_paper.fixed_question_order.split(",") for qid in question_ids: que_order.remove(qid) if que_order: question_paper.fixed_question_order = ",".join(que_order) else: question_paper.fixed_question_order = "" question_paper.save() question_paper.fixed_questions.remove(*question_ids) if 'add-random' in request.POST: question_ids = request.POST.getlist('random_questions', None) num_of_questions = request.POST.get('num_of_questions', 1) if question_ids and marks: random_set = QuestionSet(marks=marks, num_questions=num_of_questions) random_set.save() for question in Question.objects.filter(id__in=question_ids): random_set.questions.add(question) question_paper.random_questions.add(random_set) if 'remove-random' in request.POST: random_set_ids = request.POST.getlist('random_sets', None) question_paper.random_questions.remove(*random_set_ids) if 'save' in request.POST or 'back' in request.POST: qpaper_form.save() return my_redirect('/exam/manage/courses/') if marks: questions = _get_questions(user, question_type, marks) questions = _remove_already_present(questionpaper_id, questions) question_paper.update_total_marks() question_paper.save() random_sets = question_paper.random_questions.all() fixed_questions = question_paper.get_ordered_questions() context = {'qpaper_form': qpaper_form, 'filter_form': filter_form, 'qpaper': question_paper, 'questions': questions, 'fixed_questions': fixed_questions, 'state': state, 'random_sets': random_sets} return my_render_to_response('yaksh/design_questionpaper.html', context, context_instance=RequestContext(request)) @login_required @email_verified def show_all_questions(request): """Show a list of all the questions currently in the database.""" user = request.user ci = RequestContext(request) context = {} if not is_moderator(user): raise Http404("You are not allowed to view this page !") if request.method == 'POST': if request.POST.get('delete') == 'delete': data = request.POST.getlist('question') if data is not None: questions = Question.objects.filter(id__in=data, user_id=user.id, active=True) for question in questions: question.active = False question.save() if request.POST.get('upload') == 'upload': form = UploadFileForm(request.POST, request.FILES) if form.is_valid(): questions_file = request.FILES['file'] file_name = questions_file.name.split('.') if file_name[-1] == "zip": ques = Question() files, extract_path = extract_files(questions_file) context['message'] = ques.read_json(extract_path, user, files) else: message = "Please Upload a ZIP file" context['message'] = message if request.POST.get('download') == 'download': question_ids = request.POST.getlist('question') if question_ids: question = Question() zip_file = question.dump_questions(question_ids, user) response = HttpResponse(content_type='application/zip') response['Content-Disposition'] = '''attachment;\ filename={0}_questions.zip'''.format(user) zip_file.seek(0) response.write(zip_file.read()) return response else: context['msg'] = "Please select atleast one question to download" if request.POST.get('test') == 'test': question_ids = request.POST.getlist("question") if question_ids: trial_paper = test_mode(user, False, question_ids, None) trial_paper.update_total_marks() trial_paper.save() return my_redirect("/exam/start/1/{0}".format(trial_paper.id)) else: context["msg"] = "Please select atleast one question to test" questions = Question.objects.filter(user_id=user.id, active=True) form = QuestionFilterForm(user=user) upload_form = UploadFileForm() context['papers'] = [] context['question'] = None context['questions'] = questions context['form'] = form context['upload_form'] = upload_form return my_render_to_response('yaksh/showquestions.html', context, context_instance=ci) @login_required @email_verified def user_data(request, user_id, 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!') user = User.objects.get(id=user_id) data = AnswerPaper.objects.get_user_data(user, questionpaper_id) context = {'data': data} return my_render_to_response('yaksh/user_data.html', context, context_instance=RequestContext(request)) @login_required @email_verified 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 @email_verified def grade_user(request, quiz_id=None, user_id=None, attempt_number=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!') course_details = Course.objects.filter(Q(creator=current_user) | Q(teachers=current_user), is_trial=False).distinct() context = {"course_details": course_details} if quiz_id is not None: questionpaper_id = QuestionPaper.objects.filter(quiz_id=quiz_id)\ .values("id") user_details = AnswerPaper.objects\ .get_users_for_questionpaper(questionpaper_id) quiz = get_object_or_404(Quiz, id=quiz_id) if not quiz.course.is_creator(current_user) and not \ quiz.course.is_teacher(current_user): raise Http404('This course does not belong to you') has_quiz_assignments = AssignmentUpload.objects.filter( question_paper_id=questionpaper_id ).exists() context = {"users": user_details, "quiz_id": quiz_id, "quiz":quiz, "has_quiz_assignments": has_quiz_assignments } if user_id is not None: attempts = AnswerPaper.objects.get_user_all_attempts\ (questionpaper_id, user_id) try: if attempt_number is None: attempt_number = attempts[0].attempt_number except IndexError: raise Http404('No attempts for paper') has_user_assignments = AssignmentUpload.objects.filter( question_paper_id=questionpaper_id, user_id=user_id ).exists() user = User.objects.get(id=user_id) data = AnswerPaper.objects.get_user_data(user, questionpaper_id, attempt_number ) context = {'data': data, "quiz_id": quiz_id, "users": user_details, "attempts": attempts, "user_id": user_id, "has_user_assignments": has_user_assignments, "has_quiz_assignments": has_quiz_assignments } if request.method == "POST": papers = data['papers'] for paper in papers: for question, answers in six.iteritems(paper.get_question_answers()): marks = float(request.POST.get('q%d_marks' % question.id, 0)) answer = answers[-1]['answer'] answer.set_marks(marks) answer.save() paper.update_marks() paper.comments = request.POST.get( 'comments_%d' % paper.question_paper.id, 'No comments') paper.save() return my_render_to_response('yaksh/grade_user.html', context, context_instance=ci ) @login_required @email_verified def view_profile(request): """ view moderators and users profile """ user = request.user ci = RequestContext(request) if is_moderator(user): template = 'manage.html' else: template = 'user.html' context = {'template': template} if has_profile(user): context['user'] = user return my_render_to_response('yaksh/view_profile.html', context) 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 @email_verified def edit_profile(request): """ edit profile details facility for moderator and students """ user = request.user ci = RequestContext(request) if is_moderator(user): template = 'manage.html' else: template = 'user.html' context = {'template': template} 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 @email_verified 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 = {'success': False} course = get_object_or_404(Course, pk=course_id) context['course'] = course if user != course.creator and user not in course.teachers.all(): raise Http404('You are not allowed to view this page!') if request.method == 'POST': u_name = request.POST.get('uname') if not len(u_name) == 0: 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)| Q(id=course.creator.id)) context['success'] = True context['teachers'] = teachers return my_render_to_response('yaksh/addteacher.html', context, context_instance=ci) @login_required @email_verified 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, pk=course_id) if user == course.creator or user in course.teachers.all(): context['course'] = course else: raise Http404('You are not allowed to view this page!') if request.method == 'POST': teacher_ids = request.POST.getlist('check') teachers = User.objects.filter(id__in=teacher_ids) add_to_group(teachers) course.add_teachers(*teachers) context['status'] = True context['teachers_added'] = teachers return my_render_to_response('yaksh/addteacher.html', context, context_instance=ci) @login_required @email_verified def remove_teachers(request, course_id): """ remove user from a course """ user = request.user course = get_object_or_404(Course, pk=course_id) if not is_moderator(user) and (user != course.creator and user not in course.teachers.all()): raise Http404('You are not allowed to view this page!') 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') def test_mode(user, godmode=False, questions_list=None, quiz_id=None): """creates a trial question paper for the moderators""" if questions_list is not None: trial_course = Course.objects.create_trial_course(user) trial_quiz = Quiz.objects.create_trial_quiz(trial_course, user) trial_questionpaper = QuestionPaper.objects\ .create_trial_paper_to_test_questions\ (trial_quiz, questions_list) else: trial_quiz = Quiz.objects.create_trial_from_quiz(quiz_id, user, godmode) trial_questionpaper = QuestionPaper.objects\ .create_trial_paper_to_test_quiz\ (trial_quiz, quiz_id) return trial_questionpaper @login_required @email_verified def test_quiz(request, mode, quiz_id): """creates a trial quiz for the moderators""" godmode = True if mode == "godmode" else False current_user = request.user quiz = Quiz.objects.get(id=quiz_id) if (quiz.is_expired() or not quiz.active) and not godmode: return my_redirect('/exam/manage') trial_questionpaper = test_mode(current_user, godmode, None, quiz_id) return my_redirect("/exam/start/{0}".format(trial_questionpaper.id)) @login_required @email_verified def view_answerpaper(request, questionpaper_id): user = request.user quiz = get_object_or_404(QuestionPaper, pk=questionpaper_id).quiz if quiz.view_answerpaper and user in quiz.course.students.all(): data = AnswerPaper.objects.get_user_data(user, questionpaper_id) has_user_assignment = AssignmentUpload.objects.filter(user=user, question_paper_id=questionpaper_id).exists() context = {'data': data, 'quiz': quiz, "has_user_assignment":has_user_assignment} return my_render_to_response('yaksh/view_answerpaper.html', context) else: return my_redirect('/exam/quizzes/') @login_required @email_verified def create_demo_course(request): """ creates a demo course for user """ user = request.user ci = RequestContext(request) if not is_moderator(user): raise("You are not allowed to view this page") demo_course = Course() success = demo_course.create_demo(user) if success: msg = "Created Demo course successfully" else: msg = "Demo course already created" return prof_manage(request, msg) @login_required @email_verified def grader(request, extra_context=None): user = request.user if not is_moderator(user): raise Http404('You are not allowed to view this page!') courses = Course.objects.filter(is_trial=False) user_courses = list(courses.filter(creator=user)) + list(courses.filter(teachers=user)) context = {'courses': user_courses} if extra_context: context.update(extra_context) return my_render_to_response('yaksh/regrade.html', context) @login_required @email_verified def regrade(request, course_id, question_id=None, answerpaper_id=None, questionpaper_id=None): user = request.user course = get_object_or_404(Course, pk=course_id) if not is_moderator(user) or (user != course.creator and user not in course.teachers.all()): raise Http404('You are not allowed to view this page!') details = [] if answerpaper_id is not None and question_id is None: answerpaper = get_object_or_404(AnswerPaper, pk=answerpaper_id) for question in answerpaper.questions.all(): details.append(answerpaper.regrade(question.id)) if questionpaper_id is not None and question_id is not None: answerpapers = AnswerPaper.objects.filter(questions=question_id, question_paper_id=questionpaper_id) for answerpaper in answerpapers: details.append(answerpaper.regrade(question_id)) if answerpaper_id is not None and question_id is not None: answerpaper = get_object_or_404(AnswerPaper, pk=answerpaper_id) details.append(answerpaper.regrade(question_id)) return grader(request, extra_context={'details': details}) @login_required @email_verified def download_course_csv(request, course_id): user = request.user if not is_moderator(user): raise Http404('You are not allowed to view this page!') course = get_object_or_404(Course,pk=course_id) if not course.is_creator(user) and not course.is_teacher(user): raise Http404('The question paper does not belong to your course') students = course.get_only_students().annotate(roll_number=F('profile__roll_number'), institute=F('profile__institute') )\ .values("id", "first_name", "last_name", "email","institute", "roll_number" ) quizzes = Quiz.objects.filter(course=course, is_trial=False) for student in students: total_course_marks = 0.0 user_course_marks = 0.0 for quiz in quizzes: quiz_best_marks = AnswerPaper.objects.get_user_best_of_attempts_marks\ (quiz, student["id"]) user_course_marks += quiz_best_marks total_course_marks += quiz.questionpaper_set.values_list\ ("total_marks", flat=True)[0] student["{}".format(quiz.description)] = quiz_best_marks student["total_scored"] = user_course_marks student["out_of"] = total_course_marks response = HttpResponse(content_type='text/csv') response['Content-Disposition'] = 'attachment; filename="{0}.csv"'.format( (course.name).lower().replace('.', '')) header = ['first_name', 'last_name', "roll_number","email", "institute"]\ +[quiz.description for quiz in quizzes] + ['total_scored', 'out_of'] writer = csv.DictWriter(response,fieldnames=header, extrasaction='ignore') writer.writeheader() for student in students: writer.writerow(student) return response def activate_user(request, key): ci = RequestContext(request) profile = get_object_or_404(Profile, activation_key=key) context = {} context['success'] = False if profile.is_email_verified: context['activation_msg'] = "Your account is already verified" return my_render_to_response('yaksh/activation_status.html', context, context_instance=ci) if timezone.now() > profile.key_expiry_time: context['msg'] = dedent(""" Your activation time expired. Please try again. """) else: context['success'] = True profile.is_email_verified = True profile.save() context['msg'] = "Your account is activated" return my_render_to_response('yaksh/activation_status.html', context, context_instance=ci) def new_activation(request, email=None): ci = RequestContext(request) context = {} if request.method == "POST": email = request.POST.get('email') try: user = User.objects.get(email=email) except MultipleObjectsReturned: context['email_err_msg'] = "Multiple entries found for this email"\ "Please change your email" return my_render_to_response('yaksh/activation_status.html', context, context_instance=ci) except ObjectDoesNotExist: context['success'] = False context['msg'] = "Your account is not verified. \ Please verify your account" return render_to_response('yaksh/activation_status.html', context, context_instance=ci) if not user.profile.is_email_verified: user.profile.activation_key = generate_activation_key(user.username) user.profile.key_expiry_time = timezone.now() + \ timezone.timedelta(minutes=20) user.profile.save() new_user_data = User.objects.get(email=email) success, msg = send_user_mail(new_user_data.email, new_user_data.profile.activation_key ) if success: context['activation_msg'] = msg else: context['msg'] = msg else: context['activation_msg'] = "Your account is already verified" return my_render_to_response('yaksh/activation_status.html', context, context_instance=ci) def update_email(request): context = {} ci = RequestContext(request) if request.method == "POST": email = request.POST.get('email') username = request.POST.get('username') user = get_object_or_404(User, username=username) user.email = email user.save() return new_activation(request, email) else: context['email_err_msg'] = "Please Update your email" return my_render_to_response('yaksh/activation_status.html', context, context_instance=ci) @login_required @email_verified def download_assignment_file(request, quiz_id, question_id=None, user_id=None): user = request.user qp = QuestionPaper.objects.get(quiz_id=quiz_id) assignment_files, file_name = AssignmentUpload.objects.get_assignments(qp, question_id, user_id ) zipfile_name = string_io() zip_file = zipfile.ZipFile(zipfile_name, "w") for f_name in assignment_files: folder = f_name.user.get_full_name().replace(" ", "_") sub_folder = f_name.assignmentQuestion.summary.replace(" ", "_") folder_name = os.sep.join((folder, sub_folder, os.path.basename( f_name.assignmentFile.name)) ) zip_file.write(f_name.assignmentFile.path, folder_name ) zip_file.close() zipfile_name.seek(0) response = HttpResponse(content_type='application/zip') response['Content-Disposition'] = '''attachment;\ filename={0}.zip'''.format( file_name.replace(" ", "_") ) response.write(zipfile_name.read()) return response @login_required @email_verified def duplicate_course(request, course_id): user = request.user course = get_object_or_404(Course, pk=course_id) if not is_moderator(user): raise Http404('You are not allowed to view this page!') if course.is_teacher(user) or course.is_creator(user): course.create_duplicate_course(user) else: msg = 'You do not have permissions to clone this course, please contact your '\ 'instructor/administrator.' return complete(request, msg, attempt_num=None, questionpaper_id=None) return my_redirect('/exam/manage/courses/')