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views.py
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views.py
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import json
import logging
from decimal import Decimal
#import paypalrestsdk
from django.contrib import messages
from django.core import signing
from django.db.models import Sum
from django.http import HttpResponse, HttpResponseBadRequest
from django.shortcuts import get_object_or_404, redirect, render
from django.urls import reverse
from django.utils.translation import gettext_lazy as _
from django.views.decorators.clickjacking import xframe_options_exempt
from django.views.decorators.csrf import csrf_exempt
from django.views.decorators.http import require_POST
from django_scopes import scopes_disabled
#from paypalrestsdk.openid_connect import Tokeninfo
from pretix.base.models import Event, Order, OrderPayment, OrderRefund, Quota
from pretix.base.payment import PaymentException
from pretix.control.permissions import event_permission_required
from pretix.multidomain.urlreverse import eventreverse
from pretix_mercadopago.models import ReferencedMercadoPagoObject
from pretix_mercadopago.payment import Mercadopago
logger = logging.getLogger('pretix.plugins.meli')
def admin_view(request, *args, **kwargs):
r = render(request, 'pretix_mercadopago/admin.html', {
})
r._csp_ignore = True
return r
@xframe_options_exempt
def redirect_view(request, *args, **kwargs):
signer = signing.Signer(salt='safe-redirect')
try:
url = signer.unsign(request.GET.get('url', ''))
except signing.BadSignature:
return HttpResponseBadRequest('Invalid parameter')
r = render(request, 'pretix_mercadopago/redirect.html', {
'url': url,
})
r._csp_ignore = True
return r
def success(request, *args, **kwargs):
pid = request.GET.get('preference_id')
orderid = request.GET.get('external_reference')
merchant_order_id = request.GET.get('merchant_order_id')
collection_id = request.GET.get('collection_id')
status = request.GET.get('collection_status')
urlkwargs = {}
payment=Mercadopago(request.event)
urlkwargs['step'] = 'confirm'
return redirect(eventreverse(request.event, 'presale:event.checkout', kwargs=urlkwargs))
if 'cart_namespace' in kwargs:
urlkwargs['cart_namespace'] = kwargs['cart_namespace']
if request.session.get('payment_mercadopago_payment'):
payment = OrderPayment.objects.get(pk=request.session.get('payment_mercadopago_payment'))
else:
payment = None
if pid == request.session.get('payment_mercadopago_id', None):
if payment:
prov = Mercadopago(request.event)
try:
resp = prov.execute_payment(request, payment)
except PaymentException as e:
messages.error(request, str(e))
urlkwargs['step'] = 'payment'
return redirect(eventreverse(request.event, 'presale:event.checkout', kwargs=urlkwargs))
if resp:
return resp
else:
messages.error(request, _('Invalid response from MercadoPago received.'))
logger.error('Session did not contain payment_mercadopago_id')
urlkwargs['step'] = 'payment'
return redirect(eventreverse(request.event, 'presale:event.checkout', kwargs=urlkwargs))
if payment:
return redirect(eventreverse(request.event, 'presale:event.order', kwargs={
'order': payment.order.code,
'secret': payment.order.secret
}) + ('?paid=yes' if payment.order.status == Order.STATUS_PAID else ''))
else:
urlkwargs['step'] = 'confirm'
return redirect(eventreverse(request.event, 'presale:event.checkout', kwargs=urlkwargs))
def abort(request, *args, **kwargs):
messages.error(request, _('It looks like you canceled the MercadoPago payment'))
if request.session.get('payment_mercadoapgo_payment'):
payment = OrderPayment.objects.get(pk=request.session.get('payment_mercadopago_payment'))
else:
payment = None
if payment:
return redirect(eventreverse(request.event, 'presale:event.order', kwargs={
'order': payment.order.code,
'secret': payment.order.secret
}) + ('?paid=yes' if payment.order.status == Order.STATUS_PAID else ''))
else:
return redirect(eventreverse(request.event, 'presale:event.checkout', kwargs={'step': 'payment'}))
@csrf_exempt
@require_POST
@scopes_disabled()
def webhook(request, *args, **kwargs):
event_body = request.body.decode('utf-8').strip()
event_json = json.loads(event_body)
# We do not check the signature, we just use it as a trigger to look the charge up.
if event_json['resource_type'] not in ('sale', 'refund'):
return HttpResponse("Not interested in this resource type", status=200)
if event_json['resource_type'] == 'sale':
saleid = event_json['resource']['id']
else:
saleid = event_json['resource']['sale_id']
try:
refs = [saleid]
if event_json['resource'].get('parent_payment'):
refs.append(event_json['resource'].get('parent_payment'))
rso = ReferencedMercadoPagoObject.objects.select_related('order', 'order__event').get(
reference__in=refs
)
event = rso.order.event
except ReferencedMercadoPagoObject.DoesNotExist:
rso = None
if hasattr(request, 'event'):
event = request.event
else:
return HttpResponse("Unable to detect event", status=200)
prov = MercadoPago(event)
prov.init_api()
try:
sale = prov.get_preference(saleid)
except:
logger.exception('MercadoPago error on webhook. Event data: %s' % str(event_json))
return HttpResponse('Sale not found', status=500)
if rso and rso.payment:
payment = rso.payment
else:
payments = OrderPayment.objects.filter(order__event=event, provider='mercadopago',
info__icontains=sale['id'])
payment = None
# for p in payments:
# payment_info = p.info_data
# for res in payment_info['transactions'][0]['related_resources']:
# for k, v in res.items():
# if k == 'sale' and v['id'] == sale['id']:
# payment = p
# break
if not payment:
return HttpResponse('Payment not found', status=200)
payment.order.log_action('pretix.plugins.mercadopago.event', data=event_json)
if payment.state == OrderPayment.PAYMENT_STATE_CONFIRMED and sale['state'] in ('partially_refunded', 'refunded'):
if event_json['resource_type'] == 'refund':
try:
refund = paypalrestsdk.Refund.find(event_json['resource']['id'])
except:
logger.exception('MercadoPago error on webhook. Event data: %s' % str(event_json))
return HttpResponse('Refund not found', status=500)
known_refunds = {r.info_data.get('id'): r for r in payment.refunds.all()}
if refund['id'] not in known_refunds:
payment.create_external_refund(
amount=abs(Decimal(refund['amount']['total'])),
info=json.dumps(refund.to_dict() if not isinstance(refund, dict) else refund)
)
elif known_refunds.get(refund['id']).state in (
OrderRefund.REFUND_STATE_CREATED, OrderRefund.REFUND_STATE_TRANSIT) and refund['state'] == 'completed':
known_refunds.get(refund['id']).done()
if 'total_refunded_amount' in refund:
known_sum = payment.refunds.filter(
state__in=(OrderRefund.REFUND_STATE_DONE, OrderRefund.REFUND_STATE_TRANSIT,
OrderRefund.REFUND_STATE_CREATED, OrderRefund.REFUND_SOURCE_EXTERNAL)
).aggregate(s=Sum('amount'))['s'] or Decimal('0.00')
total_refunded_amount = Decimal(refund['total_refunded_amount']['value'])
if known_sum < total_refunded_amount:
payment.create_external_refund(
amount=total_refunded_amount - known_sum
)
elif sale['state'] == 'refunded':
known_sum = payment.refunds.filter(
state__in=(OrderRefund.REFUND_STATE_DONE, OrderRefund.REFUND_STATE_TRANSIT,
OrderRefund.REFUND_STATE_CREATED, OrderRefund.REFUND_SOURCE_EXTERNAL)
).aggregate(s=Sum('amount'))['s'] or Decimal('0.00')
if known_sum < payment.amount:
payment.create_external_refund(
amount=payment.amount - known_sum
)
elif payment.state in (OrderPayment.PAYMENT_STATE_PENDING, OrderPayment.PAYMENT_STATE_CREATED,
OrderPayment.PAYMENT_STATE_CANCELED, OrderPayment.PAYMENT_STATE_FAILED) and sale['state'] == 'completed':
try:
payment.confirm()
except Quota.QuotaExceededException:
pass
return HttpResponse(status=200)
@event_permission_required('can_change_event_settings')
@require_POST
def oauth_disconnect(request, **kwargs):
del request.event.settings.payment_mercadopago_connect_refresh_token
del request.event.settings.payment_mercadopago_connect_user_id
request.event.settings.payment_mercadopago__enabled = False
messages.success(request, _('Your MercadoPago account has been disconnected.'))
return redirect(reverse('control:event.settings.payment.provider', kwargs={
'organizer': request.event.organizer.slug,
'event': request.event.slug,
'provider': 'mercadopago'
}))