src/club/payment_methods.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 hashlib import sha256
   5 from django.conf import settings
   6 from django.urls import reverse
   7 from django.utils.timezone import now
   8 from django.utils.translation import get_language
   9 from paypal.rest import agreement_approval_url
  10 from django.template.loader import render_to_string
  11 from .payu import POSS
  12
  13
  14 class PaymentMethod(object):
  15     is_onetime = False
  16     is_recurring = False
  17     expiration_reliable = False
  18     cancellable = False
  19     updateable = False
  20
  21     def initiate(self, request, schedule):
  22         return reverse('club_dummy_payment', args=[schedule.key])
  23
  24
  25 class PayU(PaymentMethod):
  26     is_onetime = True
  27     expiration_reliable = True
  28     slug = 'payu'
  29     name = 'PayU'
  30     template_name = 'club/payment/payu.html'
  31
  32     def __init__(self, pos_id):
  33         self.pos_id = pos_id
  34
  35     def invite_widget(self, schedule):
  36         return render_to_string(
  37             'club/payment/payu_invite.html',
  38             {
  39                 'schedule': schedule,
  40             }
  41         )
  42
  43     def initiate(self, request, schedule):
  44         # Create Order at once.
  45         from .models import PayUOrder
  46         order = PayUOrder.objects.create(
  47             pos_id=self.pos_id,
  48             customer_ip=request.META['REMOTE_ADDR'],
  49             schedule=schedule,
  50         )
  51         return order.put()
  52
  53
  54 class PayURe(PaymentMethod):
  55     slug = 'payu-re'
  56     name = 'PayU recurring'
  57     template_name = 'club/payment/payu-re.html'
  58     is_recurring = True
  59     expiration_reliable = True
  60     cancellable = True
  61     updateable = True
  62
  63     def __init__(self, pos_id):
  64         self.pos_id = pos_id
  65
  66     def initiate(self, request, schedule):
  67         return reverse('club_payu_rec_payment', args=[schedule.key])
  68
  69     def invite_widget(self, schedule):
  70         from . import forms
  71         pos = POSS[self.pos_id]
  72         widget_args = {
  73             'merchant-pos-id': pos.pos_id,
  74             'shop-name': "SHOW NAME",
  75             'total-amount': str(int(schedule.amount * 100)),
  76             'currency-code': pos.currency_code,
  77             'customer-language': get_language(), # filter to pos.languages
  78             'customer-email': schedule.email,
  79             'store-card': 'true',
  80             'recurring-payment': 'true',
  81         }
  82         widget_sig = sha256(
  83             (
  84                 "".join(v for (k, v) in sorted(widget_args.items())) +
  85                 pos.secondary_key
  86             ).encode('utf-8')
  87         ).hexdigest()
  88
  89         return render_to_string(
  90             'payu/rec_widget.html',
  91             {
  92                 'form': forms.PayUCardTokenForm(),
  93                 'pos': POSS[self.pos_id],
  94                 'widget_args': widget_args,
  95                 'widget_sig': widget_sig,
  96             }
  97         )
  98
  99     def pay(self, request, schedule):
 100         # Create order, put it and see what happens next.
 101         from .models import PayUOrder
 102         if request is not None:
 103             ip = request.META['REMOTE_ADDR']
 104         else:
 105             ip = '127.0.0.1'
 106
 107         if request is None:
 108             if not self.needs_retry(schedule):
 109                 return
 110
 111         order = PayUOrder.objects.create(
 112             pos_id=self.pos_id,
 113             customer_ip=ip,
 114             schedule=schedule,
 115         )
 116         return order.put()
 117
 118     def needs_retry(self, schedule):
 119         retry_last = schedule.payuorder_set.exclude(
 120             created_at=None).order_by('-created_at').first()
 121         if retry_last is None:
 122             return True
 123
 124         n = now().date()
 125         days_since_last = (n - retry_last.created_at.date()).days
 126
 127         retry_start = max(
 128             schedule.expires_at.date(),
 129             settings.CLUB_RETRIES_START
 130         )
 131         retry_days = (n - retry_start).days
 132
 133         if retry_days > settings.CLUB_RETRY_DAYS_MAX:
 134             print('expired')
 135             return False
 136         if retry_days > settings.CLUB_RETRY_DAYS_DAILY:
 137             print('retry less often now')
 138             return days_since_last > settings.CLUB_RETRY_LESS
 139         return days_since_last > 0
 140
 141
 142 class PayPal(PaymentMethod):
 143     slug = 'paypal'
 144     name = 'PayPal'
 145     template_name = 'club/payment/paypal.html'
 146     is_recurring = True
 147     is_onetime = False
 148
 149     def invite_widget(self, schedule):
 150         return render_to_string(
 151             'club/payment/paypal_invite.html',
 152             {
 153                 'schedule': schedule,
 154             }
 155         )
 156
 157     def initiate(self, request, schedule):
 158         app = request.GET.get('app')
 159         return agreement_approval_url(schedule.amount, schedule.key, app=app)
 160
 161     def pay(self, request, schedule):
 162         from datetime import date, timedelta, datetime
 163         from pytz import utc
 164         tomorrow = datetime(*(date.today() + timedelta(2)).timetuple()[:3], tzinfo=utc)
 165         any_active = False
 166         for ba in schedule.billingagreement_set.all():
 167             active = ba.check_agreement()
 168             ba.active = active
 169             ba.save()
 170             if active:
 171                 any_active = True
 172         if any_active:
 173             schedule.expires_at = tomorrow
 174             schedule.save()
 175
 176
 177 methods = []
 178
 179 pos = getattr(settings, 'CLUB_PAYU_RECURRING_POS', None)
 180 if pos:
 181     recurring_payment_method = PayURe(pos)
 182     methods.append(recurring_payment_method)
 183 else:
 184     recurring_payment_method = None
 185
 186 pos = getattr(settings, 'CLUB_PAYU_POS', None)
 187 if pos:
 188     single_payment_method = PayU(pos)
 189     methods.append(single_payment_method)
 190 else:
 191     single_payment_method = None
 192
 193
 194
 195 methods.append(
 196     PayPal()
 197 )