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1 """
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2 Views for the contests application.
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3
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4 """
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5 from django.http import (HttpResponse, HttpResponseForbidden,
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6 HttpResponseBadRequest)
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7 from django.shortcuts import get_object_or_404
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8 from django.utils import simplejson
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9 from django.views.decorators.http import require_POST
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10
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11 from contests.models import Contest
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12
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13
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14 @require_POST
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15 def enter(request):
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16 """
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17 This view is an AJAX view that is used to enter or withdraw a user from a
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18 given contest. This function toggles the user's entered state in the
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19 contest.
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20
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21 """
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22 if not request.user.is_authenticated():
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23 return HttpResponseForbidden("Please login first")
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24
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25 contest_id = request.POST.get('contest_id')
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26 if not contest_id:
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27 return HttpResponseBadRequest("Missing contest_id")
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28
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29 contest = get_object_or_404(Contest, pk=contest_id)
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30 if not contest.can_enter():
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31 return HttpResponseForbidden("Contest is over")
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32
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33 # Toggle the user's state in the contest
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34
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35 result = {}
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36 if request.user in contest.contestants.all():
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37 contest.contestants.remove(request.user)
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38 result['entered'] = False
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39 result['msg'] = 'You have been withdrawn from this contest.'
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40 else:
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41 contest.contestants.add(request.user)
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42 result['entered'] = True
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43 result['msg'] = 'You have been entered into this contest!'
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44
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45 json = simplejson.dumps(result)
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46 return HttpResponse(json, content_type='application/json')
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