Implement ticket download dates (closes #15)

src/pretix/base/forms.py

@@ -81,8 +81,7 @@ class SettingsForm(forms.Form):
 
     def __init__(self, *args, **kwargs):
         self.obj = kwargs.pop('obj')
-        if 'initial' not in kwargs:
-            kwargs['initial'] = self.obj.settings
+        kwargs['initial'] = self.obj.settings
         super().__init__(*args, **kwargs)
 
     def save(self):

src/pretix/base/settings.py

@@ -73,6 +73,10 @@ DEFAULTS = {
         'default': 'True',
         'type': bool
     },
+    'ticket_download_date': {
+        'default': None,
+        'type': datetime
+    },
     'last_order_modification_date': {
         'default': None,
         'type': datetime

src/pretix/control/templates/pretixcontrol/event/base.html

@@ -34,6 +34,12 @@
                     {% trans "Plugins" %}
                 </a>
             </li>
+            <li>
+                <a href="{% url 'control:event.settings.tickets' organizer=request.event.organizer.slug event=request.event.slug %}"
+                        {% if "event.settings.tickets" == url_name %}class="active"{% endif %} >
+                    {% trans "Tickets" %}
+                </a>
+            </li>
         </ul>
     </li>
     <li>

src/pretix/control/templates/pretixcontrol/event/tickets.html

@@ -0,0 +1,23 @@
+{% extends "pretixcontrol/event/settings_base.html" %}
+{% load i18n %}
+{% load bootstrap3 %}
+{% block inside %}
+    <form action="" method="post" class="form-horizontal">
+        {% if "success" in request.GET %}
+            <div class="alert alert-success">
+                {% trans "Your changes have been saved." %}
+            </div>
+        {% endif %}
+        {% csrf_token %}
+        <fieldset>
+            <legend>{% trans "Ticket download" %}</legend>
+            {% bootstrap_field form.ticket_download layout="horizontal" %}
+            {% bootstrap_field form.ticket_download_date layout="horizontal" %}
+        </fieldset>
+        <div class="form-group submit-group">
+            <button type="submit" class="btn btn-primary btn-save">
+                {% trans "Save" %}
+            </button>
+        </div>
+    </form>
+{% endblock %}

src/pretix/control/urls.py

@@ -13,6 +13,7 @@ urlpatterns = [
         url(r'^settings/$', event.EventUpdate.as_view(), name='event.settings'),
         url(r'^settings/plugins$', event.EventPlugins.as_view(), name='event.settings.plugins'),
         url(r'^settings/payment$', event.PaymentSettings.as_view(), name='event.settings.payment'),
+        url(r'^settings/tickets$', event.TicketSettings.as_view(), name='event.settings.tickets'),
         url(r'^items/$', item.ItemList.as_view(), name='event.items'),
         url(r'^items/add$', item.ItemCreate.as_view(), name='event.items.add'),
         url(r'^items/(?P<item>[0-9a-f-]+)/$', item.ItemUpdateGeneral.as_view(), name='event.item'),

src/pretix/control/views/event.py

@@ -2,6 +2,7 @@ from collections import OrderedDict
 from django.conf import settings
 from django.shortcuts import render, redirect
 from django.utils.functional import cached_property
+from django.views.generic import FormView
 from django.views.generic.base import TemplateView
 from django.views.generic.detail import SingleObjectMixin
 from django import forms
@@ -303,5 +304,64 @@ class PaymentSettings(EventPermissionRequiredMixin, TemplateView, SingleObjectMi
         }) + '?success=true'
 
 
+class TicketSettingsForm(SettingsForm):
+    ticket_download = forms.BooleanField(
+        label=_("Use feature"),
+        help_text=_("Use pretix to generate tickets for the user to download and print out."),
+        required=False
+    )
+    ticket_download_date = forms.DateTimeField(
+        label=_("Download date"),
+        help_text=_("Ticket download will be offered after this date."),
+        required=True
+    )
+
+    def prepare_fields(self):
+        # See clean()
+        for k, v in self.fields.items():
+            v._required = v.required
+            v.required = False
+            v.widget.is_required = False
+
+    def clean(self):
+        # required=True files should only be required if the feature is enabled
+        cleaned_data = super().clean()
+        enabled = cleaned_data.get('ticket_download') == 'True'
+        if not enabled:
+            return
+        for k, v in self.fields.items():
+            val = cleaned_data.get(k)
+            if v._required and (val is None or val == ""):
+                print(enabled, k, v)
+                self.add_error(k, _('This field is required.'))
+
+
+class TicketSettings(EventPermissionRequiredMixin, FormView):
+    model = Event
+    form_class = TicketSettingsForm
+    template_name = 'pretixcontrol/event/tickets.html'
+    permission = 'can_change_settings'
+
+    def form_valid(self, form):
+        form.save()
+        return super().form_valid(form)
+
+    def get_success_url(self) -> str:
+        return reverse('control:event.settings.tickets', kwargs={
+            'organizer': self.request.event.organizer.slug,
+            'event': self.request.event.slug
+        }) + '?success=true'
+
+    def get_form_kwargs(self):
+        kwargs = super().get_form_kwargs()
+        kwargs['obj'] = self.request.event
+        return kwargs
+
+    def get_form(self, form_class=None):
+        form = super().get_form(form_class)
+        form.prepare_fields()
+        return form
+
+
 def index(request, organizer, event):
     return render(request, 'pretixcontrol/event/index.html', {})

src/pretix/presale/templates/pretixpresale/event/order.html

@@ -24,6 +24,31 @@
             </div>
         </div>
     {% endif %}
+    {% if order.status == 'p' and event.settings.ticket_download %}
+        <div class="panel panel-primary">
+            <div class="panel-heading">
+                <h3 class="panel-title">{% trans "Ticket download" %}</h3>
+            </div>
+            <div class="panel-body">
+                {% if can_download %}
+                    <p>
+                        {% blocktrans trimmed %}
+                            Please use the buttons below to obtain your ticket. Please have your ticket ready when
+                            entering the event.
+                        {% endblocktrans %}
+                    </p>
+                    <a href="{% url "presale:event.order.download" organizer=request.event.organizer.slug event=request.event.slug order=order.code %}"
+                            class="btn btn-primary">
+                        <span class="fa fa-print"></span> {% trans "Download PDF" %}
+                    </a>
+                {% else %}
+                    {% blocktrans trimmed with date=event.settings.ticket_download_date|date %}
+                        You will be able to download your tickets here on {{ date }}.
+                    {% endblocktrans %}
+                {% endif %}
+            </div>
+        </div>
+    {% endif %}
     <div class="panel panel-primary cart">
         <div class="panel-heading">
             {% if order.can_modify_answers %}

src/pretix/presale/views/order.py

@@ -2,6 +2,7 @@ from io import StringIO, BytesIO
 from django.contrib import messages
 from django.core.urlresolvers import reverse
 from django.shortcuts import redirect
+from django.utils.timezone import now
 from django.utils.translation import ugettext_lazy as _
 from django.utils.functional import cached_property
 from django.views.generic import TemplateView, View
@@ -48,6 +49,11 @@ class OrderDetails(EventViewMixin, EventLoginRequiredMixin, OrderDetailMixin,
     def get_context_data(self, **kwargs):
         ctx = super().get_context_data(**kwargs)
         ctx['order'] = self.order
+        ctx['can_download'] = (
+            self.request.event.settings.ticket_download
+            and now() > self.request.event.settings.ticket_download_date
+            and self.order.status == Order.STATUS_PAID
+        )
         ctx['cart'] = self.get_cart(
             answers=True,
             queryset=OrderPosition.objects.current.filter(order=self.order)
@@ -144,6 +150,13 @@ class OrderCancel(EventViewMixin, EventLoginRequiredMixin, OrderDetailMixin,
 class OrderDownload(EventViewMixin, EventLoginRequiredMixin, OrderDetailMixin,
                     View):
 
+    def get_order_url(self):
+        return reverse('presale:event.order', kwargs={
+            'event': self.request.event.slug,
+            'organizer': self.request.event.organizer.slug,
+            'order': self.order.code,
+        })
+
     def get(self, request, *args, **kwargs):
         from reportlab.graphics.shapes import Drawing
         from reportlab.pdfgen import canvas
@@ -151,8 +164,14 @@ class OrderDownload(EventViewMixin, EventLoginRequiredMixin, OrderDetailMixin,
         from reportlab.graphics.barcode.qr import QrCodeWidget
         from reportlab.graphics import renderPDF
         from PyPDF2 import PdfFileWriter, PdfFileReader
+
         if self.order.status != Order.STATUS_PAID:
-            return HttpResponseForbidden(_('Order is not paid'))
+            messages.error(request, _('Order is not paid.'))
+            return redirect(self.get_order_url())
+        if not self.request.event.settings.ticket_download or now() < self.request.event.settings.ticket_download_date:
+            messages.error(request, _('Ticket download is not (yet) enabled.'))
+            return redirect(self.get_order_url())
+
         response = HttpResponse(content_type='application/pdf')
         response['Content-Disposition'] = 'inline; filename="order%s%s.pdf"' % (request.event.slug, self.order.code)