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