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
  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 @csrf_exempt
  37 def form(request, submission_id, key):
  38     state = CompetitionState.get_state()
  39     if state == CompetitionState.DURING:
  40         state = 'single'
  41     return globals()['form_' + state](request, submission_id, key)
  42
  43
  44 @cache_until_start
  45 def form_before(request, submission_id, key):
  46     submission = Submission.objects.get(id=submission_id)
  47     if submission.key != key:
  48         return render(request, 'wtem/key_not_found_before.html')
  49     else:
  50         submission.opened_link = True
  51         submission.save()
  52         return render(request, 'wtem/main_before.html')
  53
  54
  55 def form_after(request, submission_id, key):
  56     return render(request, 'wtem/main_after.html')
  57
  58
  59 @never_cache
  60 @csrf_exempt
  61 def form_during(request, key):
  62
  63     if CompetitionState.get_state() != CompetitionState.DURING:
  64         if request.META['REMOTE_ADDR'] not in getattr(settings, 'WTEM_CONTEST_IP_ALLOW', []):
  65             return HttpResponseForbidden('Not allowed')
  66
  67     try:
  68         submission = Submission.objects.get(key=key)
  69     except Submission.DoesNotExist:
  70         if settings.DEBUG and key == DEBUG_KEY:
  71             submission = Submission.create(
  72                 first_name='Debug', last_name='Debug', email='debug@debug.com', key=DEBUG_KEY)
  73         else:
  74             return render(request, 'wtem/key_not_found.html')
  75     exercises_with_answers = deepcopy(exercises)
  76     if submission.answers:
  77         answers = json.loads(submission.answers)
  78     else:
  79         answers = {}
  80     for exercise in exercises_with_answers:
  81         exercise['saved_answer'] = answers.get(str(exercise['id']), '')
  82         if exercise['type'] == 'open' and exercise.get('fields'):
  83             field_answers = {field['id']: field['text'] for field in exercise['saved_answer']}
  84             for field in exercise['fields']:
  85                 field['saved_answer'] = field_answers.get(field['id'], '')
  86     if request.method == 'GET':
  87         return render(request, 'wtem/main.html', {'exercises': exercises_with_answers, 'end_time': submission.end_time})
  88     elif request.method == 'POST':
  89         form = WTEMForm(request.POST, request.FILES, instance=submission)
  90         if form.is_valid():
  91             form.save()
  92             return render(request, 'wtem/thanks.html', dict(end_time=submission.end_time))
  93         else:
  94             raise Exception
  95
  96
  97 @never_cache
  98 @csrf_exempt
  99 def form_single(request, submission_id, key):
 100     if CompetitionState.get_state() != CompetitionState.DURING:
 101         if request.META['REMOTE_ADDR'] not in getattr(settings, 'WTEM_CONTEST_IP_ALLOW', []):
 102             return HttpResponseForbidden('Not allowed')
 103
 104     submission = Submission.objects.get(id=submission_id)
 105     if submission.key != key:
 106         return render(request, 'wtem/key_not_found.html')
 107
 108     i, exercise = submission.current_exercise()
 109
 110     exercise_count = len(exercises)
 111
 112     if not exercise:
 113         return render(request, 'wtem/thanks_single.html')
 114
 115     if request.method == 'GET':
 116         return render(request, 'wtem/single.html', {'exercise': exercise, 'no': i, 'exercise_count': exercise_count})
 117     elif request.method == 'POST':
 118         form = WTEMSingleForm(request.POST, request.FILES, instance=submission)
 119         if form.is_valid():
 120             try:
 121                 form.save()
 122             except ValueError as e:
 123                 if e.message == 'wrong exercise id':
 124                     messages.error(request, u'Próba wysłania odpowiedzi ponownie lub poza kolejnością')
 125             print 'wysyłam redirect', i
 126             return HttpResponseRedirect(reverse('wtem_form', kwargs={'submission_id': submission_id, 'key': key}))
 127         else:
 128             raise Exception
 129
 130
 131 @cache_until_start
 132 @csrf_exempt
 133 def start(request, submission_id, key):
 134     state = CompetitionState.get_state()
 135     if state in (CompetitionState.BEFORE, CompetitionState.AFTER):
 136         return globals()['form_' + state](request, submission_id, key)
 137
 138     submission = Submission.objects.get(id=submission_id)
 139     if submission.key != key:
 140         return render(request, 'wtem/key_not_found.html')
 141
 142     submission.opened_link = True
 143     submission.save()
 144
 145     i, exercise = submission.current_exercise()
 146     if not exercise:
 147         return render(request, 'wtem/thanks_single.html')
 148
 149     return render(request, 'wtem/start.html', {'exercise_count': len(exercises), 'submission': submission})
 150
 151
 152 def confirmation(request, id, key):
 153     conf = get_object_or_404(Confirmation, id=id, key=key)
 154     was_confirmed = conf.confirmed
 155     if not was_confirmed:
 156         conf.confirmed = True
 157         conf.save()
 158     return render(request, 'wtem/confirmed.html', {'confirmation': conf, 'was_confirmed': was_confirmed})