apps/funding/views.py

   1 # -*- coding: utf-8 -*-
   2 # This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
   3 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
   4 #
   5 from datetime import date
   6 from django.views.decorators.cache import never_cache
   7 from django.conf import settings
   8 from django.core.urlresolvers import reverse
   9 from django.http import Http404
  10 from django.shortcuts import redirect, get_object_or_404
  11 from django.views.decorators.csrf import csrf_exempt
  12 from django.views.generic import TemplateView, FormView, DetailView, ListView
  13 import getpaid.backends.payu
  14 from getpaid.models import Payment
  15 from .forms import FundingForm
  16 from .models import Offer, Spent, Funding
  17
  18
  19 def mix(*streams):
  20     substreams = []
  21     for stream, read_date, tag in streams:
  22         iterstream = iter(stream)
  23         try:
  24             item = next(iterstream)
  25         except StopIteration:
  26             pass
  27         else:
  28             substreams.append([read_date(item), item, iterstream, read_date, tag])
  29     while substreams:
  30         i, substream = max(enumerate(substreams), key=lambda x: x[1][0])
  31         yield substream[4], substream[1]
  32         try:
  33             item = next(substream[2])
  34         except StopIteration:
  35             del substreams[i]
  36         else:
  37             substream[0:2] = [substream[3](item), item]
  38
  39
  40 class WLFundView(TemplateView):
  41     template_name = "funding/wlfund.html"
  42
  43     def get_context_data(self):
  44         def add_total(total, it):
  45             for tag, e in it:
  46                 e.total = total
  47                 if tag == 'spent':
  48                     total += e.amount
  49                 else:
  50                     total -= e.wlfund
  51                 yield tag, e
  52
  53         ctx = super(WLFundView, self).get_context_data()
  54         offers = []
  55
  56         for o in Offer.past():
  57             if o.is_win():
  58                 o.wlfund = o.sum() - o.target
  59                 if o.wlfund > 0:
  60                     offers.append(o)
  61             else:
  62                 o.wlfund = o.sum()
  63                 if o.wlfund > 0:
  64                     offers.append(o)
  65         amount = sum(o.wlfund for o in offers) - sum(o.amount for o in Spent.objects.all())
  66
  67         ctx['amount'] = amount
  68         ctx['log'] = add_total(amount, mix(
  69             (offers, lambda x: x.end, 'offer'),
  70             (Spent.objects.all().select_related(), lambda x: x.timestamp, 'spent'),
  71         ))
  72         return ctx
  73
  74
  75 class OfferDetailView(FormView):
  76     form_class = FundingForm
  77     template_name = "funding/offer_detail.html"
  78     backend = 'getpaid.backends.payu'
  79
  80     @csrf_exempt
  81     def dispatch(self, request, slug=None):
  82         if getattr(self, 'object', None) is None:
  83             if slug:
  84                 self.object = get_object_or_404(Offer.public(), slug=slug)
  85             else:
  86                 self.object = Offer.current()
  87                 if self.object is None:
  88                     raise Http404
  89         return super(OfferDetailView, self).dispatch(request, slug)
  90
  91     def get_form(self, form_class):
  92         if self.request.method == 'POST':
  93             return form_class(self.object, self.request.POST)
  94         else:
  95             return form_class(self.object, initial={'amount': settings.FUNDING_DEFAULT})
  96
  97     def get_context_data(self, *args, **kwargs):
  98         ctx = super(OfferDetailView, self).get_context_data(*args, **kwargs)
  99         ctx['object'] = self.object
 100         if self.object.is_current():
 101             ctx['funding_no_show_current'] = True
 102         return ctx
 103
 104     def form_valid(self, form):
 105         funding = form.save()
 106         # Skip getpaid.forms.PaymentMethodForm, go directly to the broker.
 107         payment = Payment.create(funding, self.backend)
 108         gateway_url_tuple = payment.get_processor()(payment).get_gateway_url(self.request)
 109         payment.change_status('in_progress')
 110         return redirect(gateway_url_tuple[0])
 111
 112
 113 class CurrentView(OfferDetailView):
 114     @csrf_exempt
 115     def dispatch(self, request, slug=None):
 116         self.object = Offer.current()
 117         if self.object is None:
 118             raise Http404
 119         elif slug != self.object.slug:
 120             return redirect(reverse('funding_current', args=[self.object.slug]))
 121         return super(CurrentView, self).dispatch(request, slug)
 122
 123
 124 class OfferListView(ListView):
 125     queryset = Offer.public()
 126
 127     def get_context_data(self, *args, **kwargs):
 128         ctx = super(OfferListView, self).get_context_data(*args, **kwargs)
 129         ctx['funding_no_show_current'] = True
 130         return ctx
 131
 132
 133 class ThanksView(TemplateView):
 134     template_name = "funding/thanks.html"
 135
 136     def get_context_data(self, *args, **kwargs):
 137         ctx = super(ThanksView, self).get_context_data(*args, **kwargs)
 138         ctx['offer'] = Offer.current()
 139         ctx['funding_no_show_current'] = True
 140         return ctx
 141
 142
 143 class NoThanksView(TemplateView):
 144     template_name = "funding/no_thanks.html"
 145
 146
 147 class DisableNotifications(TemplateView):
 148     template_name = "funding/disable_notifications.html"
 149
 150     @csrf_exempt
 151     def dispatch(self, request):
 152         self.object = get_object_or_404(Funding,
 153             email=request.GET.get('email'), notify_key=request.GET.get('key'))
 154         return super(DisableNotifications, self).dispatch(request)
 155
 156     def post(self, *args, **kwargs):
 157         self.object.disable_notifications()
 158         return redirect(self.request.get_full_path())