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