wtem/views.py

   1 # -*- coding: utf-8 -*-
   2 import json
   3 from copy import deepcopy
   4 from functools import wraps
   5
   6 from django.conf import settings
   7 from django.contrib import messages
   8 from django.core.urlresolvers import reverse
   9 from django.http import HttpResponseForbidden
  10 from django.http.response import HttpResponseRedirect, Http404
  11 from django.shortcuts import render, get_object_or_404
  12 from django.utils import timezone
  13 from django.utils.cache import patch_cache_control, add_never_cache_headers
  14 from django.views.decorators.cache import never_cache
  15 from django.views.decorators.csrf import csrf_exempt
  16
  17 from wtem.models import Confirmation, TeacherConfirmation
  18 from .forms import WTEMForm, WTEMSingleForm
  19 from .models import Submission, DEBUG_KEY, exercises, CompetitionState
  20
  21
  22 def cache_until_start(view_func):
  23     @wraps(view_func)
  24     def _wrapped_view_func(request, *args, **kwargs):
  25         response = view_func(request, *args, **kwargs)
  26         max_age = max(int((CompetitionState.start - timezone.now()).total_seconds()) + 1, 0)
  27         if max_age:
  28             patch_cache_control(response, max_age=max_age)
  29         else:
  30             add_never_cache_headers(response)
  31         return response
  32
  33     return _wrapped_view_func
  34
  35
  36 def get_submission(submission_id):
  37     try:
  38         submission_id = int(submission_id)
  39     except ValueError:
  40         raise Http404
  41     return get_object_or_404(Submission, id=submission_id)
  42
  43
  44 @csrf_exempt
  45 def form(request, submission_id, key):
  46     state = CompetitionState.get_state()
  47     if state == CompetitionState.DURING:
  48         state = 'single'
  49     if request.META['REMOTE_ADDR'] in getattr(settings, 'WTEM_CONTEST_IP_ALLOW', []):
  50         state = 'single'
  51     return globals()['form_' + state](request, submission_id, key)
  52
  53
  54 @cache_until_start
  55 def form_before(request, submission_id, key):
  56     submission = get_submission(submission_id)
  57     if submission.key != key:
  58         return render(request, 'wtem/key_not_found_before.html')
  59     else:
  60         submission.opened_link = True
  61         submission.save()
  62         return render(request, 'wtem/main_before.html')
  63
  64
  65 def form_after(request, submission_id, key):
  66     return render(request, 'wtem/main_after.html')
  67
  68
  69 @never_cache
  70 @csrf_exempt
  71 def form_during(request, key):
  72
  73     if CompetitionState.get_state() != CompetitionState.DURING:
  74         if request.META['REMOTE_ADDR'] not in getattr(settings, 'WTEM_CONTEST_IP_ALLOW', []):
  75             return HttpResponseForbidden('Not allowed')
  76
  77     try:
  78         submission = Submission.objects.get(key=key)
  79     except Submission.DoesNotExist:
  80         if settings.DEBUG and key == DEBUG_KEY:
  81             submission = Submission.create(
  82                 first_name='Debug', last_name='Debug', email='debug@debug.com', key=DEBUG_KEY)
  83         else:
  84             return render(request, 'wtem/key_not_found.html')
  85     exercises_with_answers = deepcopy(exercises)
  86     if submission.answers:
  87         answers = json.loads(submission.answers)
  88     else:
  89         answers = {}
  90     for exercise in exercises_with_answers:
  91         exercise['saved_answer'] = answers.get(str(exercise['id']), '')
  92         if exercise['type'] == 'open' and exercise.get('fields'):
  93             field_answers = {field['id']: field['text'] for field in exercise['saved_answer']}
  94             for field in exercise['fields']:
  95                 field['saved_answer'] = field_answers.get(field['id'], '')
  96     if request.method == 'GET':
  97         return render(request, 'wtem/main.html', {'exercises': exercises_with_answers, 'end_time': submission.end_time})
  98     elif request.method == 'POST':
  99         form = WTEMForm(request.POST, request.FILES, instance=submission)
 100         if form.is_valid():
 101             form.save()
 102             return render(request, 'wtem/thanks.html', dict(end_time=submission.end_time))
 103         else:
 104             raise Exception
 105
 106
 107 @never_cache
 108 @csrf_exempt
 109 def form_single(request, submission_id, key):
 110     if CompetitionState.get_state() != CompetitionState.DURING:
 111         if request.META['REMOTE_ADDR'] not in getattr(settings, 'WTEM_CONTEST_IP_ALLOW', []):
 112             return HttpResponseForbidden('Not allowed')
 113
 114     submission = get_submission(submission_id)
 115     if submission.key != key:
 116         return render(request, 'wtem/key_not_found.html')
 117
 118     i, exercise = submission.current_exercise()
 119
 120     exercise_count = len(exercises)
 121
 122     if not exercise:
 123         return render(request, 'wtem/thanks_single.html')
 124
 125     if request.method == 'GET':
 126         return render(request, 'wtem/single.html', {'exercise': exercise, 'no': i, 'exercise_count': exercise_count})
 127     elif request.method == 'POST':
 128         form = WTEMSingleForm(request.POST, request.FILES, instance=submission)
 129         if form.is_valid():
 130             try:
 131                 form.save()
 132             except ValueError as e:
 133                 if e.message == 'wrong exercise id':
 134                     messages.error(request, u'Próba wysłania odpowiedzi ponownie lub poza kolejnością')
 135                 elif e.message == 'no answer':
 136                     messages.error(request, u'Wybierz przynajmniej jedną odpowiedź')
 137             return HttpResponseRedirect(reverse('wtem_form', kwargs={'submission_id': submission_id, 'key': key}))
 138         else:
 139             raise Exception(u'Błędna wartość w formularzu')
 140
 141
 142 @cache_until_start
 143 @csrf_exempt
 144 def start(request, submission_id, key):
 145     state = CompetitionState.get_state()
 146     if state in (CompetitionState.BEFORE, CompetitionState.AFTER):
 147         return globals()['form_' + state](request, submission_id, key)
 148
 149     submission = get_submission(submission_id)
 150     if submission.key != key:
 151         return render(request, 'wtem/key_not_found.html')
 152
 153     submission.opened_link = True
 154     submission.save()
 155
 156     i, exercise = submission.current_exercise()
 157     if not exercise:
 158         return render(request, 'wtem/thanks_single.html')
 159
 160     return render(request, 'wtem/start.html', {'exercise_count': len(exercises), 'submission': submission})
 161
 162
 163 def confirmation(request, id, key):
 164     conf = get_object_or_404(Confirmation, id=id, key=key)
 165     was_confirmed = conf.confirmed
 166     if not was_confirmed:
 167         conf.confirmed = True
 168         conf.save()
 169     return render(request, 'wtem/confirmed.html', {'confirmation': conf, 'was_confirmed': was_confirmed})
 170
 171
 172 def teacher_confirmation(request, id, key):
 173     conf = get_object_or_404(TeacherConfirmation, id=id, key=key)
 174     was_confirmed = conf.confirmed
 175     if not was_confirmed:
 176         conf.confirmed = True
 177         conf.save()
 178     from contact.forms import contact_forms
 179     form_class = contact_forms['olimpiada']
 180     if not form_class.is_disabled():
 181         pass
 182     return render(request, 'wtem/teacher_confirmed.html', {
 183         'confirmation': conf,
 184         'was_confirmed': was_confirmed,
 185     })