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.core.urlresolvers import reverse
   8 from django.http import Http404
   9 from django.shortcuts import redirect, get_object_or_404
  10 from django.views.decorators.csrf import csrf_exempt
  11 from django.views.generic import TemplateView, FormView, DetailView, ListView
  12 import getpaid.backends.payu
  13 from getpaid.models import Payment
  14 from . import app_settings
  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': app_settings.DEFAULT_AMOUNT})
  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             return redirect(reverse('funding'))
 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())