import random import string import os import stat from os.path import dirname, pardir, abspath, join, exists import datetime import collections 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 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 from yaksh.models import Profile, Answer, AnswerPaper, User, TestCase from yaksh.forms import UserRegisterForm, UserLoginForm, QuizForm,\ QuestionForm, RandomQuestionForm, TestCaseFormSet,\ QuestionFilterForm 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 gen_key(no_of_chars): """Generate a random key of the number of characters.""" allowed_chars = string.digits+string.uppercase return ''.join([random.choice(allowed_chars) for i in range(no_of_chars)]) 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 fetch_questions(request): """Fetch questions from database based on the given search conditions & tags""" set1 = set() set2 = set() first_tag = request.POST.get('first_tag') first_condition = request.POST.get('first_condition') second_tag = request.POST.get('second_tag') second_condition = request.POST.get('second_condition') third_tag = request.POST.get('third_tag') question1 = set(Question.objects.filter(tags__name__in=[first_tag])) question2 = set(Question.objects.filter(tags__name__in=[second_tag])) question3 = set(Question.objects.filter(tags__name__in=[third_tag])) if first_condition == 'and': set1 = question1.intersection(question2) if second_condition == 'and': set2 = set1.intersection(question3) else: set2 = set1.union(question3) else: set1 = question1.union(question2) if second_condition == 'and': set2 = set1.intersection(question3) else: set2 = set1.union(question3) return set2 def _update_marks(answer_paper, state='completed'): answer_paper.update_marks_obtained() answer_paper.update_percent() answer_paper.update_passed() answer_paper.update_status(state) answer_paper.end_time = datetime.datetime.now() answer_paper.save() 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/start/") 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/start/") 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/start/") 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 = list(QuestionPaper.objects.filter(quiz__active=True)) user_answerpapers = AnswerPaper.objects.filter(user=user) pre_requisites = [] enabled_quizzes = [] disabled_quizzes = [] unexpired_quizzes = [] for paper in avail_quizzes: quiz_enable_time = paper.quiz.start_date_time quiz_disable_time = paper.quiz.end_date_time if quiz_enable_time <= datetime.datetime.now() <= quiz_disable_time: unexpired_quizzes.append(paper) cannot_attempt = True if 'cannot_attempt' in request.GET else False quizzes_taken = None if user_answerpapers.count() == 0 else user_answerpapers context = {'cannot_attempt': cannot_attempt, 'quizzes': avail_quizzes, 'user': user, 'quizzes_taken': quizzes_taken, 'unexpired_quizzes': unexpired_quizzes } return my_render_to_response("yaksh/quizzes_user.html", context) @login_required def intro(request, questionpaper_id): """Show introduction page before quiz starts""" user = request.user ci = RequestContext(request) quest_paper = QuestionPaper.objects.get(id=questionpaper_id) attempt_number = quest_paper.quiz.attempts_allowed time_lag = quest_paper.quiz.time_between_attempts quiz_enable_time = quest_paper.quiz.start_date_time quiz_disable_time = quest_paper.quiz.end_date_time quiz_expired = False if quiz_enable_time <= datetime.datetime.now() \ <= quiz_disable_time else True if quest_paper.quiz.prerequisite: try: pre_quest = QuestionPaper.objects.get( quiz=quest_paper.quiz.prerequisite) answer_papers = AnswerPaper.objects.filter( question_paper=pre_quest, user=user) answer_papers_failed = AnswerPaper.objects.filter( question_paper=pre_quest, user=user, passed=False) if answer_papers.count() == answer_papers_failed.count(): context = {'user': user, 'cannot_attempt': True} return my_redirect("/exam/quizzes/?cannot_attempt=True") except: context = {'user': user, 'cannot_attempt': True} return my_redirect("/exam/quizzes/?cannot_attempt=True") attempted_papers = AnswerPaper.objects.filter(question_paper=quest_paper, user=user) already_attempted = attempted_papers.count() inprogress, previous_attempt, next_attempt = _check_previous_attempt(attempted_papers, already_attempted, attempt_number) if previous_attempt: if inprogress: return show_question(request, previous_attempt.current_question(), previous_attempt.attempt_number, previous_attempt.question_paper.id) days_after_attempt = (datetime.datetime.today() - \ previous_attempt.start_time).days if next_attempt: if days_after_attempt >= time_lag: context = {'user': user, 'paper_id': questionpaper_id, 'attempt_num': already_attempted + 1, 'enable_quiz_time': quiz_enable_time, 'disable_quiz_time': quiz_disable_time, 'quiz_expired': quiz_expired } return my_render_to_response('yaksh/intro.html', context, context_instance=ci) else: return my_redirect("/exam/quizzes/") else: context = {'user': user, 'paper_id': questionpaper_id, 'attempt_num': already_attempted + 1, 'enable_quiz_time': quiz_enable_time, 'disable_quiz_time': quiz_disable_time, 'quiz_expired': quiz_expired } return my_render_to_response('yaksh/intro.html', context, context_instance=ci) def _check_previous_attempt(attempted_papers, already_attempted, attempt_number): next_attempt = False if already_attempted == attempt_number else True if already_attempted == 0: return False, None, next_attempt else: previous_attempt = attempted_papers[already_attempted-1] if previous_attempt.status == 'inprogress': if previous_attempt.time_left() > 0: return True, previous_attempt, next_attempt else: return False, previous_attempt, next_attempt else: return False, previous_attempt, next_attempt @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.filter(user=user) quiz_marks = [] for paper in papers: marks_obtained = paper.marks_obtained max_marks = paper.question_paper.total_marks percentage = round((marks_obtained/max_marks)*100, 2) temp = paper.question_paper.quiz.description, marks_obtained,\ max_marks, percentage quiz_marks.append(temp) context = {'papers': quiz_marks} return my_render_to_response("yaksh/results_user.html", context) @login_required def edit_quiz(request): """Edit the list of quizzes seleted by the user for editing.""" user = request.user if not user.is_authenticated() or not is_moderator(user): raise Http404('You are not allowed to view this page!') quiz_list = request.POST.getlist('quizzes') start_date = request.POST.getlist('start_date') start_time = request.POST.getlist('start_time') end_date = request.POST.getlist('end_date') end_time = request.POST.getlist('end_time') duration = request.POST.getlist('duration') active = request.POST.getlist('active') description = request.POST.getlist('description') pass_criteria = request.POST.getlist('pass_criteria') language = request.POST.getlist('language') prerequisite = request.POST.getlist('prerequisite') for j, quiz_id in enumerate(quiz_list): quiz = Quiz.objects.get(id=quiz_id) quiz.start_date_time = datetime.datetime.combine(start_date[j], start_time[j]) quiz.end_date_time = datetime.datetime.combine(end_date[j], end_time[j]) quiz.duration = duration[j] quiz.active = active[j] quiz.description = description[j] quiz.pass_criteria = pass_criteria[j] quiz.language = language[j] quiz.prerequisite_id = prerequisite[j] quiz.save() return my_redirect("/exam/manage/showquiz/") @login_required def edit_question(request): """Edit the list of questions selected by the user for editing.""" user = request.user if not user.is_authenticated() or not is_moderator(user): raise Http404('You are not allowed to view this page!') question_list = request.POST.getlist('questions') summary = request.POST.getlist('summary') description = request.POST.getlist('description') points = request.POST.getlist('points') options = request.POST.getlist('options') test = request.POST.getlist('test') type = request.POST.getlist('type') active = request.POST.getlist('active') language = request.POST.getlist('language') snippet = request.POST.getlist('snippet') for j, question_id in enumerate(question_list): question = Question.objects.get(id=question_id) test_case_formset = TestCaseFormSet(request.POST, prefix='test', instance=question) if test_case_formset.is_valid(): test_case_instance = test_case_formset.save(commit=False) for i in test_case_instance: i.save() question.summary = summary[j] question.description = description[j] question.points = points[j] question.options = options[j] question.active = active[j] question.language = language[j] question.snippet = snippet[j] question.ref_code_path = ref_code_path[j] question.test = test[j] question.type = type[j] question.save() return my_redirect("/exam/manage/questions") @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] tags = form['tags'].data.split(',') for i in range(0, len(tags)-1): tag = tags[i].strip() question.tags.add(tag) 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) test_case_formset = add_or_delete_test_form(request.POST, d) if 'save_question' in request.POST: d.summary = form['summary'].data d.description = form['description'].data d.points = form['points'].data d.options = form['options'].data d.type = form['type'].data d.active = form['active'].data d.language = form['language'].data d.snippet = form['snippet'].data d.ref_code_path = form['ref_code_path'].data d.test = form['test'].data d.save() question = Question.objects.get(id=question_id) for tag in question.tags.all(): question.tags.remove(tag) tags = form['tags'].data.split(',') for i in range(0, len(tags)-1): tag = tags[i].strip() question.tags.add(tag) test_case_formset = TestCaseFormSet(request.POST, prefix='test', instance=question) if test_case_formset.is_valid(): test_case_instance = test_case_formset.save(commit=False) for i in test_case_instance: i.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: test_case_formset = add_or_delete_test_form(request.POST, form.save(commit=False)) return my_render_to_response('yaksh/add_question.html', {'form': form, 'formset': test_case_formset}, context_instance=ci) else: form = QuestionForm() test_case_formset = TestCaseFormSet(prefix='test', instance=Question()) 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() form.initial['summary'] = d.summary form.initial['description'] = d.description form.initial['points'] = d.points form.initial['options'] = d.options form.initial['type'] = d.type form.initial['active'] = d.active form.initial['language'] = d.language form.initial['snippet'] = d.snippet form.initial['ref_code_path'] = d.ref_code_path form.initial['test'] = d.test form_tags = d.tags.all() form_tags_split = form_tags.values('name') initial_tags = "" for tag in form_tags_split: initial_tags = initial_tags + str(tag['name']).strip() + "," if (initial_tags == ","): initial_tags = "" form.initial['tags'] = initial_tags 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 user.is_authenticated() or not is_moderator(user): raise Http404('You are not allowed to view this page!') if request.method == "POST": form = QuizForm(request.POST) if form.is_valid(): data = form.cleaned_data if quiz_id is None: form.save() quiz = Quiz.objects.order_by("-id")[0] return my_redirect("/exam/manage/designquestionpaper") else: d = Quiz.objects.get(id=quiz_id) sd = datetime.datetime.strptime(form['start_date'].data, '%Y-%m-%d').date() st = datetime.datetime.strptime(form['start_time'].data, "%H:%M:%S").time() ed = datetime.datetime.strptime(form['end_date'].data, '%Y-%m-%d').date() et = datetime.datetime.strptime(form['end_time'].data, "%H:%M:%S").time() d.start_date_time = datetime.datetime.combine(sd, st) d.end_date_time = datetime.datetime.combine(ed, et) d.duration = form['duration'].data d.active = form['active'].data d.description = form['description'].data d.pass_criteria = form['pass_criteria'].data d.language = form['language'].data d.prerequisite_id = form['prerequisite'].data d.attempts_allowed = form['attempts_allowed'].data d.time_between_attempts = form['time_between_attempts'].data d.save() quiz = Quiz.objects.get(id=quiz_id) return my_redirect("/exam/manage/showquiz") else: return my_render_to_response('yaksh/add_quiz.html', {'form': form}, context_instance=ci) else: if quiz_id is None: form = QuizForm() return my_render_to_response('yaksh/add_quiz.html', {'form': form}, context_instance=ci) else: d = Quiz.objects.get(id=quiz_id) form = QuizForm() form.initial['start_date'] = d.start_date_time.date() form.initial['start_time'] = d.start_date_time.time() form.initial['end_date'] = d.end_date_time.date() form.initial['end_time'] = d.end_date_time.time() form.initial['duration'] = d.duration form.initial['description'] = d.description form.initial['active'] = d.active form.initial['pass_criteria'] = d.pass_criteria form.initial['language'] = d.language form.initial['prerequisite'] = d.prerequisite_id form.initial['attempts_allowed'] = d.attempts_allowed form.initial['time_between_attempts'] = d.time_between_attempts 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 request.method == "POST" and request.POST.get('add') == "add": return my_redirect("/exam/manage/designquestionpaper/" + questionpaper_id) if request.method == "POST" and request.POST.get('delete') == "delete": data = request.POST.getlist('papers') q_paper = QuestionPaper.objects.get(id=questionpaper_id) for i in data: q_paper.questions.remove(Question.objects.get(id=i)) question_paper = QuestionPaper.objects.all() context = {'papers': question_paper} return my_render_to_response('yaksh/showquestionpapers.html', context, context_instance=ci) 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 questions = qu_papers.questions.all() context = {'papers': {'quiz': quiz, 'questions': questions}} return my_render_to_response('yaksh/editquestionpaper.html', context, context_instance=ci) @login_required def automatic_questionpaper(request, questionpaper_id=None): """Generate automatic question paper for a particular quiz""" 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: if request.method == "POST": if request.POST.get('save') == 'save': quiz = Quiz.objects.order_by("-id")[0] quest_paper = QuestionPaper() questions = request.POST.getlist('questions') tot_marks = 0 for quest in questions: q = Question.objects.get(id=quest) tot_marks += q.points quest_paper.quiz = quiz quest_paper.total_marks = tot_marks quest_paper.save() for quest in questions: q = Question.objects.get(id=quest) quest_paper.fixed_questions.add(q) return my_redirect('/exam/manage/showquiz') else: no_questions = int(request.POST.get('num_questions')) fetched_questions = fetch_questions(request) n = len(fetched_questions) msg = '' if (no_questions < n): i = n - no_questions for i in range(0, i): fetched_questions.pop() elif (no_questions > n): msg = 'The given Criteria does not satisfy the number\ of Questions...' tags = Tag.objects.all() context = {'data': {'questions': fetched_questions, 'tags': tags, 'msg': msg}} return my_render_to_response( 'yaksh/automatic_questionpaper.html', context, context_instance=ci) else: tags = Tag.objects.all() context = {'data': {'tags': tags}} return my_render_to_response('yaksh/automatic_questionpaper.html', context, context_instance=ci) else: if request.method == "POST": if request.POST.get('save') == 'save': quest_paper = QuestionPaper.objects.get(id=questionpaper_id) questions = request.POST.getlist('questions') tot_marks = quest_paper.total_marks for quest in questions: q = Question.objects.get(id=quest) tot_marks += q.points quest_paper.total_marks = tot_marks quest_paper.save() for quest in questions: q = Question.objects.get(id=quest) quest_paper.questions.add(q) return my_redirect('/yaksh/manage/showquiz') else: no_questions = int(request.POST.get('num_questions')) fetched_questions = fetch_questions(request) n = len(fetched_questions) msg = '' if(no_questions < n): i = n - no_questions for i in range(0, i): fetched_questions.pop() elif(no_questions > n): msg = 'The given Criteria does not satisfy the number of \ Questions...' tags = Tag.objects.all() context = {'data': {'questions': fetched_questions, 'tags': tags, 'msg': msg}} return my_render_to_response( 'yaksh/automatic_questionpaper.html', context, context_instance=ci) else: tags = Tag.objects.all() context = {'data': {'tags': tags}} return my_render_to_response('yaksh/automatic_questionpaper.html', context, context_instance=ci) @login_required def manual_questionpaper(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: if request.method == "POST": if request.POST.get('save') == 'save': questions = request.POST.getlist('questions') quest_paper = QuestionPaper() quiz = Quiz.objects.order_by("-id")[0] tot_marks = 0 for quest in questions: q = Question.objects.get(id=quest) tot_marks += q.points quest_paper.quiz = quiz quest_paper.total_marks = tot_marks quest_paper.save() for i in questions: q = Question.objects.get(id=i) quest_paper.questions.add(q) return my_redirect('/exam/manage/showquiz') else: fetched_questions = fetch_questions(request) n = len(fetched_questions) msg = '' if (n == 0): msg = 'No matching Question found...' tags = Tag.objects.all() context = {'data': {'questions': fetched_questions, 'tags': tags, 'msg': msg}} return my_render_to_response('yaksh/manual_questionpaper.html', context, context_instance=ci) else: tags = Tag.objects.all() context = {'data': {'tags': tags}} return my_render_to_response('yaksh/manual_questionpaper.html', context, context_instance=ci) else: if request.method == "POST": if request.POST.get('save') == 'save': quest_paper = QuestionPaper.objects.get(id=questionpaper_id) questions = request.POST.getlist('questions') tot_marks = quest_paper.total_marks for quest in questions: q = Question.objects.get(id=quest) tot_marks += q.points quest_paper.total_marks = tot_marks quest_paper.save() for i in questions: q = Question.objects.get(id=i) quest_paper.questions.add(q) return my_redirect('/exam/manage/showquiz') else: fetched_questions = fetch_questions(request) n = len(fetched_questions) msg = '' if (n == 0): msg = 'No matching Question found...' tags = Tag.objects.all() context = {'data': {'questions': fetched_questions, 'tags': tags, 'msg': msg}} return my_render_to_response('yaksh/manual_questionpaper.html', context, context_instance=ci) else: tags = Tag.objects.all() context = {'data': {'tags': tags}} return my_render_to_response('yaksh/manual_questionpaper.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.all() 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/intro/") 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, attempt_num=None, questionpaper_id=None): """Check the user cedentials and if any quiz is available, start the exam.""" user = request.user if questionpaper_id is None: return my_redirect('/exam/quizzes/') try: """Right now the app is designed so there is only one active quiz at a particular time.""" questionpaper = 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) try: old_paper = AnswerPaper.objects.get( question_paper=questionpaper, user=user, attempt_number=attempt_num) q = old_paper.current_question() return show_question(request, q, attempt_num, questionpaper_id) except AnswerPaper.DoesNotExist: ip = request.META['REMOTE_ADDR'] key = gen_key(10) try: profile = user.get_profile() except Profile.DoesNotExist: msg = 'You do not have a profile and cannot take the quiz!' raise Http404(msg) new_paper = questionpaper.make_answerpaper(user, ip, attempt_num) # Make user directory. user_dir = get_user_dir(user) return start(request, attempt_num, questionpaper_id) def get_questions(paper): ''' Takes answerpaper as an argument. Returns the total questions as ordered dictionary, the questions yet to attempt and the questions attempted ''' to_attempt = [] submitted = [] all_questions = [] questions = {} if paper.questions: all_questions = (paper.questions).split('|') if paper.questions_answered: q_answered = (paper.questions_answered).split('|') q_answered.sort() submitted = q_answered if paper.get_unanswered_questions(): q_unanswered = paper.get_unanswered_questions() q_unanswered.sort() to_attempt = q_unanswered for index, value in enumerate(all_questions, 1): questions[value] = index questions = collections.OrderedDict(sorted(questions.items(), key=lambda x:x[1])) return questions, to_attempt, submitted @login_required def question(request, q_id, attempt_num, questionpaper_id, success_msg=None): """Check the credentials of the user and start the exam.""" user = request.user if not user.is_authenticated(): return my_redirect('/exam/login/') q = get_object_or_404(Question, pk=q_id) try: q_paper = QuestionPaper.objects.get(id=questionpaper_id) paper = AnswerPaper.objects.get( user=request.user, attempt_number=attempt_num, question_paper=q_paper) except AnswerPaper.DoesNotExist: return my_redirect('/exam/start/') if not paper.question_paper.quiz.active: reason = 'The quiz has been deactivated!' return complete(request, reason, attempt_num, questionpaper_id) time_left = paper.time_left() if time_left == 0: return complete(request, attempt_num, questionpaper_id, reason='Your time is up!') quiz_name = paper.question_paper.quiz.description questions, to_attempt, submitted = get_questions(paper) if success_msg is None: context = {'question': q, 'questions': questions, 'paper': paper, 'user': user, 'quiz_name': quiz_name, 'time_left': time_left, 'to_attempt': to_attempt, 'submitted': submitted} else: context = {'question': q, 'questions': questions, 'paper': paper, 'user': user, 'quiz_name': quiz_name, 'time_left': time_left, 'success_msg': success_msg, 'to_attempt': to_attempt, 'submitted': submitted} if q.type == 'code': skipped_answer = paper.answers.filter(question=q, skipped=True) if skipped_answer: context['last_attempt'] = skipped_answer[0].answer ci = RequestContext(request) return my_render_to_response('yaksh/question.html', context, context_instance=ci) @login_required def show_question(request, q_id, attempt_num, questionpaper_id, success_msg=None): """Show a question if possible.""" user = request.user q_paper = QuestionPaper.objects.get(id=questionpaper_id) paper = AnswerPaper.objects.get(user=request.user, attempt_number=attempt_num, question_paper=q_paper) if not user.is_authenticated(): return my_redirect('/exam/login/') if len(q_id) == 0: msg = 'Congratulations! You have successfully completed the quiz.' return complete(request, msg, attempt_num, questionpaper_id) else: return question(request, q_id, attempt_num, questionpaper_id, success_msg) def _save_skipped_answer(old_skipped, user_answer, paper, question): """ Saves the answer on skip. Only the code questions are saved. Snippet is not saved with the answer. """ if old_skipped: skipped_answer = old_skipped[0] skipped_answer.answer=user_answer skipped_answer.save() else: skipped_answer = Answer(question=question, answer=user_answer, correct=False, skipped=True) skipped_answer.save() paper.answers.add(skipped_answer) def check(request, q_id, attempt_num=None, questionpaper_id=None): """Checks the answers of the user for particular question""" user = request.user q_paper = QuestionPaper.objects.get(id=questionpaper_id) paper = AnswerPaper.objects.get(user=request.user, attempt_number=attempt_num, question_paper=q_paper) if q_id in paper.questions_answered: next_q = paper.skip(q_id) return show_question(request, next_q, attempt_num, questionpaper_id) if not user.is_authenticated(): return my_redirect('/exam/login/') question = get_object_or_404(Question, pk=q_id) test_cases = TestCase.objects.filter(question=question) snippet_code = request.POST.get('snippet') user_code = request.POST.get('answer') skip = request.POST.get('skip', None) success_msg = False success = True if skip is not None: if question.type == 'code': old_skipped = paper.answers.filter(question=question, skipped=True) _save_skipped_answer(old_skipped, user_code, paper, question) next_q = paper.skip(q_id) return show_question(request, next_q, attempt_num, questionpaper_id) # 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' 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. if not question.type == 'upload': 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') success_msg = True else: new_answer.error = result.get('error') new_answer.save() _update_marks(paper, 'inprogress') time_left = paper.time_left() if not result.get('success'): # Should only happen for non-mcq questions. if time_left <= 0: reason = 'Your time is up!' return complete(request, reason, attempt_num, questionpaper_id) if not paper.question_paper.quiz.active: reason = 'The quiz has been deactivated!' return complete(request, reason, attempt_num, questionpaper_id) questions, to_attempt, submitted = get_questions(paper) old_answer = paper.answers.filter(question=question, skipped=True) if old_answer: old_answer[0].answer = user_code old_answer[0].save() context = {'question': question, 'error_message': result.get('error'), 'paper': paper, 'last_attempt': user_code, 'quiz_name': paper.question_paper.quiz.description, 'time_left': time_left, 'questions': questions, 'to_attempt': to_attempt, 'submitted': submitted} ci = RequestContext(request) return my_render_to_response('yaksh/question.html', context, context_instance=ci) else: if time_left <= 0: reason = 'Your time is up!' return complete(request, reason, attempt_num, questionpaper_id) # Display the same question if user_answer is None elif not user_answer: msg = "Please submit a valid option or code" time_left = paper.time_left() questions, to_attempt, submitted = get_questions(paper) context = {'question': question, 'error_message': msg, 'paper': paper, 'quiz_name': paper.question_paper.quiz.description, 'time_left': time_left, 'questions': questions, 'to_attempt': to_attempt, 'submitted': submitted} ci = RequestContext(request) return my_render_to_response('yaksh/question.html', context, context_instance=ci) else: next_q = paper.completed_question(question.id) return show_question(request, next_q, attempt_num, questionpaper_id, success_msg) 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 get_question_labels(request, attempt_num=None, questionpaper_id=None): """Get the question number show in template for corresponding question id.""" unattempted_questions = [] submitted_questions = [] try: q_paper = QuestionPaper.objects.get(id=questionpaper_id) paper = AnswerPaper.objects.get( user=request.user, attempt_number=attempt_num, question_paper=q_paper) except AnswerPaper.DoesNotExist: return my_redirect('/exam/start/') questions, to_attempt, submitted = get_questions(paper) for q_id, question_label in questions.items(): if q_id in to_attempt: unattempted_questions.append(question_label) else: submitted_questions.append(question_label) unattempted_questions.sort() submitted_questions.sort() return unattempted_questions, submitted_questions def quit(request, attempt_num=None, questionpaper_id=None): """Show the quit page when the user logs out.""" unattempted_questions, submitted_questions = get_question_labels(request, attempt_num, questionpaper_id) context = {'id': questionpaper_id, 'attempt_num': attempt_num, 'unattempted': unattempted_questions, 'submitted': submitted_questions} 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: unattempted_questions, submitted_questions = get_question_labels(request, attempt_num, questionpaper_id) q_paper = QuestionPaper.objects.get(id=questionpaper_id) paper = AnswerPaper.objects.get(user=user, question_paper=q_paper, attempt_number=attempt_num) _update_marks(paper) obt_marks = paper.marks_obtained tot_marks = paper.question_paper.total_marks if obt_marks == paper.question_paper.total_marks: context = {'message': "Hurray ! You did an excellent job.\ you answered all the questions correctly.\ You have been logged out successfully,\ Thank You !", 'unattempted': unattempted_questions, 'submitted': submitted_questions} return my_render_to_response('yaksh/complete.html', context) else: message = reason or "You are successfully logged out" context = {'message': message, 'unattempted': unattempted_questions, 'submitted': submitted_questions} return my_render_to_response('yaksh/complete.html', context) no = False message = reason or 'The quiz has been completed. Thank you.' if user.groups.filter(name='moderator').count() > 0: message = 'You are successfully Logged out.' if request.method == 'POST' and 'no' in request.POST: no = True if not no: # Logout the user and quit with the message given. answer_paper = AnswerPaper.objects.get(id=answerpaper_id) answer_paper.end_time = datetime.datetime.now() answer_paper.save() return my_redirect('/exam/quizzes/') else: return my_redirect('/exam/') @login_required def show_statistics(request, questionpaper_id): user = request.user if not is_moderator(user): raise Http404('You are not allowed to view this page') papers = AnswerPaper.objects.filter(question_paper_id=questionpaper_id, status='completed') total_attempt = papers.count() if total_attempt == 0: return my_redirect('/exam/manage/') questions_answered = [] question_stats = {} for paper in papers: questions_answered += paper.questions_answered.split('|') quiz_name = paper.question_paper.quiz.description questions_answered = collections.Counter(map(int, filter(None, questions_answered))) questions = Question.objects.filter( id__in=paper.questions.split('|') ).order_by('type') for question in questions: if question.id in questions_answered: question_stats[question] = questions_answered[question.id] else: question_stats[question] = 0 context = {'question_stats': question_stats, 'quiz_name': quiz_name, '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.all() 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.get(id=questionpaper_id) except QuestionPaper.DoesNotExist: papers = [] q_paper = None 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 = {} try: profile = user.get_profile() except Profile.DoesNotExist: # Admin user may have a paper by accident but no profile. profile = 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)) @login_required def show_all_quiz(request): """Generates a list of all the quizzes that are currently in the database.""" 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('quiz') if data is None: quizzes = Quiz.objects.all() context = {'papers': [], 'quiz': None, 'quizzes': quizzes} return my_render_to_response('yaksh/show_quiz.html', context, context_instance=ci) else: for i in data: quiz = Quiz.objects.get(id=i).delete() quizzes = Quiz.objects.all() context = {'papers': [], 'quiz': None, 'quizzes': quizzes} return my_render_to_response('yaksh/show_quiz.html', context, context_instance=ci) elif request.method == 'POST' and request.POST.get('edit') == 'edit': data = request.POST.getlist('quiz') forms = [] for j in data: d = Quiz.objects.get(id=j) form = QuizForm() form.initial['start_date'] = d.start_date_time.date() form.initial['start_time'] = d.start_date_time.time() form.initial['end_date'] = d.end_date_time.date() form.initial['end_time'] = d.end_date_time.time() form.initial['duration'] = d.duration form.initial['active'] = d.active form.initial['description'] = d.description form.initial['pass_criteria'] = d.pass_criteria form.initial['language'] = d.language form.initial['prerequisite'] = d.prerequisite_id forms.append(form) return my_render_to_response('yaksh/edit_quiz.html', {'forms': forms, 'data': data}, context_instance=ci) else: quizzes = Quiz.objects.all() context = {'papers': [], 'quiz': None, 'quizzes': quizzes} return my_render_to_response('yaksh/show_quiz.html', context, context_instance=ci) @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 None: 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) else: 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) elif request.method == 'POST' and request.POST.get('edit') == 'edit': data = request.POST.getlist('question') forms = [] formsets = [] for j in data: d = Question.objects.get(id=j) form = QuestionForm() form.initial['summary'] = d.summary form.initial['description'] = d.description form.initial['points'] = d.points form.initial['options'] = d.options form.initial['type'] = d.type form.initial['active'] = d.active form.initial['language'] = d.language form.initial['snippet'] = d.snippet form.initial['ref_code_path'] = d.ref_code_path form.initial['test'] = d.test form_tags = d.tags.all() form_tags_split = form_tags.values('name') initial_tags = "" for tag in form_tags_split: initial_tags = initial_tags + str(tag['name']).strip() + "," if (initial_tags == ","): initial_tags = "" form.initial['tags'] = initial_tags forms.append(form) test_case_formset = TestCaseFormSet(prefix='test', instance=d) formsets.append(test_case_formset) data_list = zip(forms, formsets) return my_render_to_response('yaksh/edit_question.html', {'data': data, 'data_list': data_list}, context_instance=ci) else: 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 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 user.is_authenticated() or 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/showquiz') else: form = RandomQuestionForm() context = {'form': form} return my_render_to_response('yaksh/design_questionpaper.html', context, context_instance=ci)