Adding initial Epay integration - far from done.

bornhack/settings/base.py

@@ -1,5 +1,8 @@
 import os
 
+import environ
+env = environ.Env()
+environ.Env.read_env()
 
 def local_dir(entry):
     return os.path.join(
@@ -91,3 +94,6 @@ BOOTSTRAP3 = {
     'jquery_url': '/static/js/jquery.min.js',
     'javascript_url': '/static/js/bootstrap.min.js'
 }
+
+EPAY_MERCHANT_NUMBER = env('EPAY_MERCHANT_NUMBER')
+EPAY_MD5_SECRET = env('EPAY_MD5_SECRET')

bornhack/settings/env.dist

@@ -7,3 +7,5 @@ EMAIL_HOST_USER='mymailuser'
 EMAIL_HOST_PASSWORD='mymailpassword'
 EMAIL_USE_TLS=True
 EMAIL_FROM='noreply@example.com'
+EPAY_MERCHANT_NUMBER=something
+EPAY_MD5_SECRET=something

tickets/admin.py

@@ -8,12 +8,14 @@ class TicketAdmin(admin.ModelAdmin):
     list_display = [
         'user',
         'ticket_type',
+        'payment_method',
         'paid',
     ]
 
     list_filter = [
         'paid',
         'ticket_type',
+        'payment_method',
     ]
 
 

tickets/forms.py

@@ -8,9 +8,14 @@ class TicketForm(forms.ModelForm):
         model = Ticket
         fields = [
             'ticket_type',
+            'payment_method',
         ]
+        widgets = {
+            'payment_method': forms.RadioSelect()
+        }
 
     ticket_type = forms.ModelChoiceField(
         queryset=TicketType.objects.available()
     )
 
+

tickets/migrations/0004_ticket_payment_method.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.5 on 2016-05-08 11:21
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('tickets', '0003_auto_20160506_2016'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='ticket',
+            name='payment_method',
+            field=models.CharField(choices=[('credit_card', 'Credit card'), ('altcoin', 'Altcoin'), ('bank_transfer', 'Bank transfer')], default='credit_card', max_length=50),
+        ),
+    ]

tickets/models.py

@@ -1,7 +1,8 @@
 from django.db import models
-from django.contrib.postgres.fields import DateTimeRangeField
+from django.contrib.postgres.fields import DateTimeRangeField, JSONField
 from django.utils.translation import ugettext_lazy as _
 from django.utils import timezone
+from django.core.urlresolvers import reverse_lazy
 
 from bornhack.utils import CreatedUpdatedModel, UUIDModel
 
@@ -31,12 +32,33 @@ class Ticket(CreatedUpdatedModel, UUIDModel):
         verbose_name=_('Ticket type'),
     )
 
+    CREDIT_CARD = 'credit_card'
+    ALTCOIN = 'altcoin'
+    BANK_TRANSFER = 'bank_transfer'
+
+    PAYMENT_METHODS = [
+        (CREDIT_CARD, 'Credit card'),
+        (ALTCOIN, 'Altcoin'),
+        (BANK_TRANSFER, 'Bank transfer'),
+    ]
+
+    payment_method = models.CharField(
+        max_length=50,
+        choices=PAYMENT_METHODS,
+        default=CREDIT_CARD
+    )
+
     def __str__(self):
         return '{} ({})'.format(
             self.ticket_type.name,
             self.ticket_type.camp
         )
 
+    def get_absolute_url(self):
+        return reverse_lazy('ticket:detail', kwargs={
+            'pk': self.pk
+        })
+
 
 class TicketType(CreatedUpdatedModel, UUIDModel):
     class Meta:
@@ -74,3 +96,20 @@ class TicketType(CreatedUpdatedModel, UUIDModel):
     def is_available(self):
         now = timezone.now()
         return now in self.available_in
+
+
+class EpayCallback(CreatedUpdatedModel, UUIDModel):
+    class Meta:
+        verbose_name = 'Epay Callback'
+        verbose_name_plural = 'Epay Callbacks'
+    payload = JSONField()
+
+
+class EpayPayment(CreatedUpdatedModel, UUIDModel):
+    class Meta:
+        verbose_name = 'Epay Payment'
+        verbose_name_plural = 'Epay Payments'
+
+    ticket = models.OneToOneField('tickets.Ticket')
+    callback = models.ForeignKey('tickets.EpayCallback')
+    txnid = models.IntegerField()

tickets/templates/tickets/epay_form.html

@@ -0,0 +1,27 @@
+{% extends "base.html" %}
+
+{% block content %}
+<article>
+    <script charset="UTF-8" src="https://ssl.ditonlinebetalingssystem.dk/integration/ewindow/paymentwindow.js" type="text/javascript"></script>
+    <script type="text/javascript">
+        paymentwindow = new PaymentWindow({
+            'merchantnumber': "{{ merchant_number }}",
+            'description': "{{ description }}",
+            'instantcapture': 1,
+            'ownreceipt': 1,
+            'amount': "{{ amount }}",
+            'currency': "DKK",
+            'orderid': "{{ order_id }}",
+            'accepturl': "{{ accept_url }}",
+            'hash': "{{ epay_hash }}",
+        });
+    </script>
+    <input onclick="javascript: paymentwindow.open()" type="button" value="Go to payment">
+    <script type="text/javascript">
+        $( document ).ready(function() {
+            paymentwindow.open();
+        });
+    </script>
+</article>
+{% endblock content %}
+

tickets/templates/tickets/index.html

@@ -36,7 +36,9 @@ Here you can see the different ticket types, their prices and availability.
           {% endif %}
         <td>
           {% if ticket_type.is_available %}
-            <a href="{% url 'tickets:buy' %}?ticket_type={{ ticket_type.pk }}">Buy</a>
+            <a href="{% url 'tickets:order' %}?ticket_type={{ ticket_type.pk }}">
+                Order
+            </a>
           {% else %}
             N/A
           {% endif %}
@@ -63,7 +65,7 @@ Here you can see the different ticket types, their prices and availability.
     {% endfor %}
     </table>
 
-    <a href="{% url 'tickets:buy' %}" class="btn btn-success">Buy tickets</a>
+    <a href="{% url 'tickets:order' %}" class="btn btn-success">Order tickets</a>
 
 {% else %}
   <a href="{% url 'account_signup' %}?next={% url 'tickets:index' %}">Sign up</a> or

tickets/urls.py

@@ -1,9 +1,15 @@
 from django.conf.urls import url
 
-from .views import BuyTicketView, TicketIndexView, TicketDetailView
+from .views import (
+    TicketIndexView,
+    TicketOrderView,
+    TicketDetailView,
+    EpayView,
+)
 
 urlpatterns = [
-    url(r'buy/$', BuyTicketView.as_view(), name='buy'),
+    url(r'order/$', TicketOrderView.as_view(), name='order'),
+    url(r'pay/credit_card/(?P<ticket_id>[a-zA-Z0-9\-]+)/$', EpayView.as_view(), name='epay_form'),
     url(
         r'detail/(?P<pk>[a-zA-Z0-9\-]+)/$',
         TicketDetailView.as_view(),

tickets/views.py

@@ -1,12 +1,15 @@
+import hashlib
+
 from django.http import HttpResponseRedirect, Http404
-from django.shortcuts import render
+from django.views.generic import CreateView, TemplateView, DetailView, View
-from django.views.generic import CreateView, TemplateView, DetailView
 from django.core.urlresolvers import reverse_lazy
+from django.conf import settings
 from django.contrib.auth.mixins import LoginRequiredMixin
+from django.http import HttpResponse
 
 from camps.models import Camp
 
-from .models import Ticket, TicketType
+from .models import Ticket, TicketType, EpayPayment, EpayCallback
 from .forms import TicketForm
 
 
@@ -33,13 +36,13 @@ class TicketDetailView(LoginRequiredMixin, CampTicketSaleCheck, DetailView):
     context_object_name = 'ticket'
 
 
-class BuyTicketView(LoginRequiredMixin, CampTicketSaleCheck, CreateView):
+class TicketOrderView(LoginRequiredMixin, CampTicketSaleCheck, CreateView):
     model = Ticket
-    template_name = "tickets/buy.html"
+    template_name = "tickets/order.html"
     form_class = TicketForm
 
     def get_form_kwargs(self):
-        kwargs = super(BuyTicketView, self).get_form_kwargs()
+        kwargs = super(TicketOrderView, self).get_form_kwargs()
         ticket_type = self.request.GET.get('ticket_type', None)
         if ticket_type:
             kwargs['initial'] = {
@@ -52,9 +55,96 @@ class BuyTicketView(LoginRequiredMixin, CampTicketSaleCheck, CreateView):
         instance = form.save(commit=False)
         instance.user = self.request.user
         instance.save()
+
+        if instance.payment_method == Ticket.ALTCOIN:
+            return HttpResponse('Altcoin')
+
+        if instance.payment_method == Ticket.CREDIT_CARD:
+            return HttpResponseRedirect(
+                reverse_lazy('tickets:epay_form', kwargs={
+                    'ticket_id': str(instance.pk)
+                })
+            )
+
         return HttpResponseRedirect(
             reverse_lazy('tickets:detail', kwargs={
                 'pk': str(instance.pk)
             })
         )
 
+
+class EpayView(TemplateView):
+    template_name = 'tickets/epay_form.html'
+
+    def get_context_data(self, **kwargs):
+        ticket = Ticket.objects.get(pk=kwargs).select_related('ticket_type')
+        accept_url = ticket.get_absolute_url()
+        amount = ticket.ticket_type.price * 100
+        order_id = str(ticket.pk)
+        description = str(ticket.user.pk)
+
+        hashstring = (
+            '{merchantnumber}{description}11{amount}DKK'
+            '{order_id}{accept_url}{md5_secret}'
+        ).format(
+            settings.EPAY_MERCHANT_NUMBER,
+            description,
+            str(amount),
+            str(order_id),
+            accept_url,
+            settings.EPAY_MD5_SECRET,
+        )
+        epay_hash = hashlib.md5(hashstring).hexdigest()
+
+        context = super(EpayView, self).get_context_data(**kwargs)
+        context['merchant_number'] = settings.EPAY_MERCHANT_NUMBER
+        context['description'] = description
+        context['order_id'] = order_id
+        context['accept_url'] = accept_url
+        context['amount'] = amount
+        context['epay_hash'] = epay_hash
+        return context
+
+
+class EpayCallbackView(View):
+
+    def get(self, request, **kwargs):
+
+        callback = EpayCallback.objects.create(
+            payload=request.GET
+        )
+
+        if 'orderid' in request.GET:
+            ticket = Ticket.objects.get(pk=request.GET.get('order_id'))
+            query = dict(
+                map(
+                    lambda x: tuple(x.split('=')),
+                    request.META['QUERY_STRING'].split('&')
+                )
+            )
+
+            hashstring = (
+                '{merchantnumber}{description}11{amount}DKK'
+                '{order_id}{accept_url}{md5_secret}'
+            ).format(
+                query.get('merchantnumber'),
+                query.get('description'),
+                query.get('amount'),
+                query.get('order_id'),
+                query.get('accept_url'),
+                settings.EPAY_MD5_SECRET,
+            )
+            epay_hash = hashlib.md5(hashstring).hexdigest()
+
+            if not epay_hash == request.GET['hash']:
+                return HttpResponse(status=400)
+
+            EpayPayment.objects.create(
+                ticket=ticket,
+                callback=callback,
+                txnid=request.GET['txnid'],
+            )
+        else:
+            return HttpResponse(status=400)
+
+        return HttpResponse('OK')