+# -*- coding: utf-8 -*-
+# This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
+# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
+#
+from datetime import timedelta
+
+import paypalrestsdk
+import pytz
+from django.contrib.sites.models import Site
+from django.core.urlresolvers import reverse
+from django.utils import timezone
+from paypalrestsdk import BillingPlan, BillingAgreement, ResourceNotFound
+from django.conf import settings
+from .models import BillingPlan as BillingPlanModel
+
+paypalrestsdk.configure(settings.PAYPAL_CONFIG)
+
+
+class PaypalError(Exception):
+ pass
+
+
+def absolute_url(url_name):
+ return "http://%s%s" % (Site.objects.get_current().domain, reverse(url_name))
+
+
+def create_plan(amount):
+ billing_plan = BillingPlan({
+ "name": "Cykliczna darowizna na Wolne Lektury: %s zł" % amount,
+ "description": "Cykliczna darowizna na wsparcie Wolnych Lektur",
+ "merchant_preferences": {
+ "auto_bill_amount": "yes",
+ "return_url": absolute_url('paypal_return'),
+ "cancel_url": absolute_url('paypal_cancel'),
+ # "initial_fail_amount_action": "continue",
+ "max_fail_attempts": "3",
+ },
+ "payment_definitions": [
+ {
+ "amount": {
+ "currency": "PLN",
+ "value": str(amount),
+ },
+ "cycles": "0",
+ "frequency": "MONTH",
+ "frequency_interval": "1",
+ "name": "Cykliczna darowizna",
+ "type": "REGULAR",
+ }
+ ],
+ "type": "INFINITE",
+ })
+
+ if not billing_plan.create():
+ raise PaypalError(billing_plan.error)
+ if not billing_plan.activate():
+ raise PaypalError(billing_plan.error)
+ plan, created = BillingPlanModel.objects.get_or_create(amount=amount, defaults={'plan_id': billing_plan.id})
+ return plan.plan_id
+
+
+def get_link(links, rel):
+ for link in links:
+ if link.rel == rel:
+ return link.href
+
+
+def create_agreement(amount):
+ try:
+ plan = BillingPlanModel.objects.get(amount=amount)
+ except BillingPlanModel.DoesNotExist:
+ plan_id = create_plan(amount)
+ else:
+ plan_id = plan.plan_id
+ start = (timezone.now() + timedelta(0, 3600*24)).astimezone(pytz.utc).strftime('%Y-%m-%dT%H:%M:%SZ')
+ billing_agreement = BillingAgreement({
+ "name": "Subskrypcja klubu WL",
+ "description": "Cykliczne wspieranie Wolnych Lektur kwotą %s złotych" % amount,
+ "start_date": start,
+ "plan": {
+ "id": plan_id,
+ },
+ "payer": {
+ "payment_method": "paypal"
+ },
+ })
+
+ response = billing_agreement.create()
+ if response:
+ return billing_agreement
+ else:
+ raise PaypalError(billing_agreement.error)
+
+
+def agreement_approval_url(amount):
+ agreement = create_agreement(amount)
+ return get_link(agreement.links, 'approval_url')
+
+
+def get_agreement(agreement_id):
+ try:
+ return BillingAgreement.find(agreement_id)
+ except ResourceNotFound:
+ return None
+
+
+def check_agreement(agreement_id):
+ a = get_agreement(agreement_id)
+ if a:
+ return a.state == 'Active'
+
+
+def execute_agreement(token):
+ return BillingAgreement.execute(token)
fnp / wolnelektury.git / commitdiff