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 get_object_or_404, render
  10
  11 from api.utils import HttpResponseAppRedirect
  12 from club.models import Schedule
  13 from paypal.forms import PaypalSubscriptionForm
  14 from paypal.rest import execute_agreement, check_agreement, agreement_approval_url, PaypalError
  15 from paypal.models import BillingAgreement, BillingPlan
  16
  17
  18 def paypal_form(request, app=False):
  19     if request.POST:
  20         if not request.user.is_authenticated:
  21             return HttpResponseForbidden()
  22         form = PaypalSubscriptionForm(data=request.POST)
  23         if form.is_valid():
  24             amount = form.cleaned_data['amount']
  25             try:
  26                 approval_url = agreement_approval_url(amount, app=app)
  27             except PaypalError as e:
  28                 return render(request, 'paypal/error_page.html', {'error': str(e)})
  29             return HttpResponseRedirect(approval_url)
  30     else:
  31         form = PaypalSubscriptionForm()
  32     return render(request, 'paypal/form.html', {'form': form})
  33
  34
  35 @login_required
  36 def paypal_return(request, key, app=False):
  37     schedule = get_object_or_404(Schedule, key=key)
  38
  39     token = request.GET.get('token')
  40     if not token:
  41         raise Http404
  42     if not BillingAgreement.objects.filter(token=token):
  43         resource = execute_agreement(token)
  44         if resource.id:
  45             amount = int(Decimal(resource.plan.payment_definitions[0].amount['value']))
  46             plan = BillingPlan.objects.get(amount=amount)
  47             active = check_agreement(resource.id) or False
  48             BillingAgreement.objects.create(
  49                 agreement_id=resource.id, schedule=schedule, plan=plan, active=active, token=token)
  50             if active:
  51                 schedule.set_payed()
  52     else:
  53         resource = None
  54     if app:
  55         if getattr(resource, 'error', None):
  56             return HttpResponseAppRedirect('wolnelekturyapp://paypal_error')
  57         else:
  58             return HttpResponseAppRedirect('wolnelekturyapp://paypal_return')
  59     else:
  60         return HttpResponseRedirect(schedule.get_thanks_url())
  61
  62
  63 def paypal_cancel(request):
  64     return render(request, 'paypal/cancel.html', {})