src/paypal/views.py

   1 # This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
   2 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
   3 #
   4 from decimal import Decimal
   5
   6 from django.contrib.auth.decorators import login_required
   7 from django.http import Http404
   8 from django.http.response import HttpResponseRedirect, HttpResponseForbidden
   9 from django.shortcuts import render
  10
  11 from api.utils import HttpResponseAppRedirect
  12 from paypal.forms import PaypalSubscriptionForm
  13 from paypal.rest import execute_agreement, check_agreement, agreement_approval_url, PaypalError
  14 from paypal.models import BillingAgreement, BillingPlan
  15
  16
  17 def paypal_form(request, app=False):
  18     if request.POST:
  19         if not request.user.is_authenticated:
  20             return HttpResponseForbidden()
  21         form = PaypalSubscriptionForm(data=request.POST)
  22         if form.is_valid():
  23             amount = form.cleaned_data['amount']
  24             try:
  25                 approval_url = agreement_approval_url(amount, app=app)
  26             except PaypalError as e:
  27                 return render(request, 'paypal/error_page.html', {'error': str(e)})
  28             return HttpResponseRedirect(approval_url)
  29     else:
  30         form = PaypalSubscriptionForm()
  31     return render(request, 'paypal/form.html', {'form': form})
  32
  33
  34 @login_required
  35 def paypal_return(request, app=False):
  36     token = request.GET.get('token')
  37     if not token:
  38         raise Http404
  39     if not BillingAgreement.objects.filter(token=token):
  40         resource = execute_agreement(token)
  41         if resource.id:
  42             amount = int(Decimal(resource.plan.payment_definitions[0].amount['value']))
  43             plan = BillingPlan.objects.get(amount=amount)
  44             active = check_agreement(resource.id) or False
  45             BillingAgreement.objects.create(
  46                 agreement_id=resource.id, user=request.user, plan=plan, active=active, token=token)
  47     else:
  48         resource = None
  49     if app:
  50         if getattr(resource, 'error', None):
  51             return HttpResponseAppRedirect('wolnelekturyapp://paypal_error')
  52         else:
  53             return HttpResponseAppRedirect('wolnelekturyapp://paypal_return')
  54     else:
  55         return render(request, 'paypal/return.html', {'resource': resource})
  56
  57
  58 def paypal_cancel(request):
  59     return render(request, 'paypal/cancel.html', {})