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
from django.views.decorators.csrf import csrf_exempt
from taggit.models import Tag
from itertools import chain
import json
# Local imports.
from testapp.exam.models import Quiz, Question, QuestionPaper, QuestionSet
from testapp.exam.models import Profile, Answer, AnswerPaper, User, TestCase
from testapp.exam.forms import UserRegisterForm, UserLoginForm, QuizForm,\
QuestionForm, RandomQuestionForm, TestCaseFormSet
from testapp.exam.xmlrpc_clients import code_server
from settings import URL_ROOT
from testapp.exam.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 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('exam/register.html', {'form': form},
context_instance=ci)
else:
form = UserRegisterForm()
return my_render_to_response('exam/register.html', {'form': form},
context_instance=ci)
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)
quizzes_taken = user_answerpapers
pre_requisites = []
context = {}
if 'cannot_attempt' in request.GET:
context['cannot_attempt'] = True
if user_answerpapers.count() == 0:
context['quizzes'] = avail_quizzes
context['user'] = user
context['quizzes_taken'] = None
return my_render_to_response("exam/quizzes_user.html", context)
context['quizzes'] = avail_quizzes
context['user'] = user
context['quizzes_taken'] = quizzes_taken
return my_render_to_response("exam/quizzes_user.html", context)
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
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()
if already_attempted == 0:
context = {'user': user, 'paper_id': questionpaper_id,\
'attempt_num': already_attempted + 1}
return my_render_to_response('exam/intro.html', context,
context_instance=ci)
if already_attempted == attempt_number:
inprogress, previous_attempt = _check_previous_attempt(attempted_papers,
already_attempted)
if inprogress:
return show_question(request,
previous_attempt.current_question(),
previous_attempt.attempt_number,
previous_attempt.question_paper.id)
else:
return my_redirect("/exam/quizzes")
if already_attempted < attempt_number or attempt_number < 0:
inprogress, previous_attempt = _check_previous_attempt(attempted_papers,
already_attempted)
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 days_after_attempt >= time_lag:
context = {'user': user, 'paper_id': questionpaper_id,\
'attempt_num': already_attempted + 1}
return my_render_to_response('exam/intro.html', context,
context_instance=ci)
else:
return my_redirect("/exam/quizzes/")
else:
return my_redirect("/exam/quizzes/")
def _check_previous_attempt(attempted_papers, already_attempted):
previous_attempt = attempted_papers[already_attempted-1]
previous_attempt_day = previous_attempt.start_time
today = datetime.datetime.today()
if previous_attempt.status == 'inprogress':
end_time = previous_attempt.end_time
quiz_time = previous_attempt.question_paper.quiz.duration*60
if quiz_time > (today-previous_attempt_day).seconds:
return True, previous_attempt
else:
return False, previous_attempt
else:
return False, previous_attempt
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("exam/results_user.html", context)
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')
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 = start_date[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/")
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")
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('exam/add_question.html',
{'form': form,
'formset': test_case_formset},
context_instance=ci)
return my_redirect("/exam/manage/questions")
return my_render_to_response('exam/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('exam/add_question.html',
{'form': form,
'formset': test_case_formset},
context_instance=ci)
return my_redirect("/exam/manage/questions")
return my_render_to_response('exam/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('exam/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('exam/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('exam/add_question.html',
{'form': form,
'formset': test_case_formset},
context_instance=ci)
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)
d.start_date = form['start_date'].data
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('exam/add_quiz.html',
{'form': form},
context_instance=ci)
else:
if quiz_id is None:
form = QuizForm()
return my_render_to_response('exam/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
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('exam/add_quiz.html',
{'form': form},
context_instance=ci)
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('exam/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('exam/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('exam/editquestionpaper.html', context,
context_instance=ci)
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(
'exam/automatic_questionpaper.html', context,
context_instance=ci)
else:
tags = Tag.objects.all()
context = {'data': {'tags': tags}}
return my_render_to_response('exam/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('/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(
'exam/automatic_questionpaper.html', context,
context_instance=ci)
else:
tags = Tag.objects.all()
context = {'data': {'tags': tags}}
return my_render_to_response('exam/automatic_questionpaper.html',
context, context_instance=ci)
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('exam/manual_questionpaper.html',
context,
context_instance=ci)
else:
tags = Tag.objects.all()
context = {'data': {'tags': tags}}
return my_render_to_response('exam/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('exam/manual_questionpaper.html',
context,
context_instance=ci)
else:
tags = Tag.objects.all()
context = {'data': {'tags': tags}}
return my_render_to_response('exam/manual_questionpaper.html',
context, context_instance=ci)
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('exam/login.html', context,
context_instance=ci)
else:
form = UserLoginForm()
context = {"form": form}
return my_render_to_response('exam/login.html', context,
context_instance=ci)
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:
to_attempt = (paper.questions).split('|')
if paper.questions_answered:
submitted = (paper.questions_answered).split('|')
if not to_attempt:
submitted.sort()
all_questions = submitted
if not submitted:
to_attempt.sort()
all_questions = to_attempt
if to_attempt and submitted:
q_append = to_attempt + submitted
q_append.sort()
all_questions = q_append
for num, value in enumerate(all_questions, 1):
questions[value] = num
questions = collections.OrderedDict(sorted(questions.items()))
return questions, to_attempt, submitted
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, questionpaper_id)
elif paper.end_time < datetime.datetime.now():
reason = 'You have already attempted the quiz'
return complete(request, reason, questionpaper_id)
time_left = paper.time_left()
if time_left == 0:
return complete(request, 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('exam/question.html', context,
context_instance=ci)
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() or paper.end_time < datetime.datetime.now():
return my_redirect('/exam/login/')
old_qid = request.POST.get('question_id')
if old_qid is not None:
quest = Question.objects.get(pk=old_qid)
user_code = request.POST.get('answer')
if quest.type == 'code':
old_skipped = paper.answers.filter(question=quest, skipped=True)
_save_skipped_answer(old_skipped, user_code, paper, quest)
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()
return show_question(request, next_q, attempt_num, questionpaper_id)
if not user.is_authenticated() or paper.end_time < datetime.datetime.now():
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()
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()
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)
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, 'to_attempt': to_attempt,
'submitted': submitted}
ci = RequestContext(request)
return my_render_to_response('exam/question.html', context,
context_instance=ci)
else:
if time_left <= 0:
reason = 'Your time is up!'
return complete(request, reason, attempt_num, questionpaper_id)
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 quit(request, attempt_num=None, questionpaper_id=None):
"""Show the quit page when the user logs out."""
context = {'id': questionpaper_id,
'attempt_num': attempt_num}
return my_render_to_response('exam/quit.html', context,
context_instance=RequestContext(request))
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('exam/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_obtained()
paper.update_percent()
paper.update_passed()
paper.end_time = datetime.datetime.now()
paper.update_status()
paper.save()
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 !"}
return my_render_to_response('exam/complete.html', context)
else:
message = reason or "You are successfully logged out"
context = {'message': message}
return my_render_to_response('exam/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/')
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('exam/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:
papers = AnswerPaper.objects.filter(question_paper=q_paper).annotate(
total=Sum('answers__marks')).order_by('-total')
context = {'papers': papers, 'quiz': q_paper, 'quizzes': None}
return my_render_to_response('exam/monitor.html', context,
context_instance=ci)
def get_user_data(username):
"""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)
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
return data
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('exam/showusers.html', context,
context_instance=RequestContext(request))
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('exam/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('exam/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
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('exam/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('exam/show_quiz.html', context,
context_instance=ci)
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()
context = {'papers': [],
'question': None,
'questions': questions}
return my_render_to_response('exam/showquestions.html', context,
context_instance=ci)
else:
for i in data:
question = Question.objects.get(id=i).delete()
questions = Question.objects.all()
context = {'papers': [],
'question': None,
'questions': questions}
return my_render_to_response('exam/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('exam/edit_question.html',
{'data': data,
'data_list': data_list},
context_instance=ci)
else:
questions = Question.objects.all()
context = {'papers': [],
'question': None,
'questions': questions}
return my_render_to_response('exam/showquestions.html', context,
context_instance=ci)
def user_data(request, username):
"""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)
context = {'data': data}
return my_render_to_response('exam/user_data.html', context,
context_instance=RequestContext(request))
def grade_user(request, username):
"""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)
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))
last_ans = answers[-1]
last_ans.marks = marks
last_ans.save()
paper.comments = request.POST.get(
'comments_%d' % paper.question_paper.id)
paper.save()
context = {'data': data}
return my_render_to_response('exam/user_data.html', context,
context_instance=ci)
else:
context = {'data': data}
return my_render_to_response('exam/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('exam/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('exam/ajax_questions.html',
{'questions': questions})
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('exam/design_questionpaper.html',
context, context_instance=ci)