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
  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     return globals()['form_' + state](request, submission_id, key)
  50
  51
  52 @cache_until_start
  53 def form_before(request, submission_id, key):
  54     submission = get_submission(submission_id)
  55     if submission.key != key:
  56         return render(request, 'wtem/key_not_found_before.html')
  57     else:
  58         submission.opened_link = True
  59         submission.save()
  60         return render(request, 'wtem/main_before.html')
  61
  62
  63 def form_after(request, submission_id, key):
  64     return render(request, 'wtem/main_after.html')
  65
  66
  67 @never_cache
  68 @csrf_exempt
  69 def form_during(request, key):
  70
  71     if CompetitionState.get_state() != CompetitionState.DURING:
  72         if request.META['REMOTE_ADDR'] not in getattr(settings, 'WTEM_CONTEST_IP_ALLOW', []):
  73             return HttpResponseForbidden('Not allowed')
  74
  75     try:
  76         submission = Submission.objects.get(key=key)
  77     except Submission.DoesNotExist:
  78         if settings.DEBUG and key == DEBUG_KEY:
  79             submission = Submission.create(
  80                 first_name='Debug', last_name='Debug', email='debug@debug.com', key=DEBUG_KEY)
  81         else:
  82             return render(request, 'wtem/key_not_found.html')
  83     exercises_with_answers = deepcopy(exercises)
  84     if submission.answers:
  85         answers = json.loads(submission.answers)
  86     else:
  87         answers = {}
  88     for exercise in exercises_with_answers:
  89         exercise['saved_answer'] = answers.get(str(exercise['id']), '')
  90         if exercise['type'] == 'open' and exercise.get('fields'):
  91             field_answers = {field['id']: field['text'] for field in exercise['saved_answer']}
  92             for field in exercise['fields']:
  93                 field['saved_answer'] = field_answers.get(field['id'], '')
  94     if request.method == 'GET':
  95         return render(request, 'wtem/main.html', {'exercises': exercises_with_answers, 'end_time': submission.end_time})
  96     elif request.method == 'POST':
  97         form = WTEMForm(request.POST, request.FILES, instance=submission)
  98         if form.is_valid():
  99             form.save()
 100             return render(request, 'wtem/thanks.html', dict(end_time=submission.end_time))
 101         else:
 102             raise Exception
 103
 104
 105 @never_cache
 106 @csrf_exempt
 107 def form_single(request, submission_id, key):
 108     if CompetitionState.get_state() != CompetitionState.DURING:
 109         if request.META['REMOTE_ADDR'] not in getattr(settings, 'WTEM_CONTEST_IP_ALLOW', []):
 110             return HttpResponseForbidden('Not allowed')
 111
 112     submission = get_submission(submission_id)
 113     if submission.key != key:
 114         return render(request, 'wtem/key_not_found.html')
 115
 116     i, exercise = submission.current_exercise()
 117
 118     exercise_count = len(exercises)
 119
 120     if not exercise:
 121         return render(request, 'wtem/thanks_single.html')
 122
 123     if request.method == 'GET':
 124         return render(request, 'wtem/single.html', {'exercise': exercise, 'no': i, 'exercise_count': exercise_count})
 125     elif request.method == 'POST':
 126         form = WTEMSingleForm(request.POST, request.FILES, instance=submission)
 127         if form.is_valid():
 128             try:
 129                 form.save()
 130             except ValueError as e:
 131                 if e.message == 'wrong exercise id':
 132                     messages.error(request, u'Próba wysłania odpowiedzi ponownie lub poza kolejnością')
 133             return HttpResponseRedirect(reverse('wtem_form', kwargs={'submission_id': submission_id, 'key': key}))
 134         else:
 135             raise Exception
 136
 137
 138 @cache_until_start
 139 @csrf_exempt
 140 def start(request, submission_id, key):
 141     state = CompetitionState.get_state()
 142     if state in (CompetitionState.BEFORE, CompetitionState.AFTER):
 143         return globals()['form_' + state](request, submission_id, key)
 144
 145     submission = get_submission(submission_id)
 146     if submission.key != key:
 147         return render(request, 'wtem/key_not_found.html')
 148
 149     submission.opened_link = True
 150     submission.save()
 151
 152     i, exercise = submission.current_exercise()
 153     if not exercise:
 154         return render(request, 'wtem/thanks_single.html')
 155
 156     return render(request, 'wtem/start.html', {'exercise_count': len(exercises), 'submission': submission})
 157
 158
 159 def confirmation(request, id, key):
 160     conf = get_object_or_404(Confirmation, id=id, key=key)
 161     was_confirmed = conf.confirmed
 162     if not was_confirmed:
 163         conf.confirmed = True
 164         conf.save()
 165     return render(request, 'wtem/confirmed.html', {'confirmation': conf, 'was_confirmed': was_confirmed})