bgneal@540: """
bgneal@540: Views for the contests application.
bgneal@540: 
bgneal@540: """
bgneal@679: import json
bgneal@679: 
bgneal@540: from django.http import (HttpResponse, HttpResponseForbidden,
bgneal@540:         HttpResponseBadRequest)
bgneal@540: from django.shortcuts import get_object_or_404
bgneal@540: from django.views.decorators.http import require_POST
bgneal@540: 
bgneal@540: from contests.models import Contest
bgneal@540: 
bgneal@540: 
bgneal@540: @require_POST
bgneal@540: def enter(request):
bgneal@540:     """
bgneal@540:     This view is an AJAX view that is used to enter or withdraw a user from a
bgneal@540:     given contest. This function toggles the user's entered state in the
bgneal@540:     contest.
bgneal@540: 
bgneal@540:     """
bgneal@540:     if not request.user.is_authenticated():
bgneal@540:         return HttpResponseForbidden("Please login first")
bgneal@540: 
bgneal@540:     contest_id = request.POST.get('contest_id')
bgneal@540:     if not contest_id:
bgneal@540:         return HttpResponseBadRequest("Missing contest_id")
bgneal@540: 
bgneal@540:     contest = get_object_or_404(Contest, pk=contest_id)
bgneal@540:     if not contest.can_enter():
bgneal@540:         return HttpResponseForbidden("Contest is over")
bgneal@540: 
bgneal@540:     # Toggle the user's state in the contest
bgneal@540: 
bgneal@540:     result = {}
bgneal@540:     if request.user in contest.contestants.all():
bgneal@540:         contest.contestants.remove(request.user)
bgneal@540:         result['entered'] = False
bgneal@540:         result['msg'] = 'You have been withdrawn from this contest.'
bgneal@540:     else:
bgneal@540:         contest.contestants.add(request.user)
bgneal@540:         result['entered'] = True
bgneal@540:         result['msg'] = 'You have been entered into this contest!'
bgneal@540: 
bgneal@679:     json_result = json.dumps(result)
bgneal@679:     return HttpResponse(json_result, content_type='application/json')