Add waiting list

src/pretix/presale/forms/waitinglist.py

@@ -0,0 +1,13 @@
+from django import forms
+
+from pretix.base.models import WaitingListEntry
+
+
+class WaitingListForm(forms.ModelForm):
+    class Meta:
+        model = WaitingListEntry
+        fields = ('email',)
+
+    def __init__(self, *args, **kwargs):
+        self.event = kwargs.pop('event')
+        super().__init__(*args, **kwargs)

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

@@ -1,13 +1,28 @@
 {% load i18n %}
+{% load eventurl %}
 {% if avail == 0 %}
     <div class="col-md-2 col-xs-6 availability-box gone">
         <strong>{% trans "SOLD OUT" %}</strong>
+        {% if event.settings.waiting_list_enabled %}
+            <br/>
+            <a href="{% eventurl event "presale:event.waitinglist" %}?item={{ item.pk }}{% if var %}&var={{ var.pk }}{% endif %}">
+                <span class="fa fa-plus-circle"></span>
+                {% trans "Waiting list" %}
+            </a>
+        {% endif %}
     </div>
 {% elif avail < 100 %}
     <div class="col-md-2 col-xs-6 availability-box unavailable">
-        <strong>{% trans "Reserved" %}</strong><br />
-        <small>
-            {% trans "All remaining products are reserved but might become available again." %}
-        </small>
+        <strong>{% trans "Reserved" %}
+            <span class="fa fa-info-circle" data-toggle="tooltip"
+                  title="{% trans "All remaining products are reserved but might become available again." %}"></span>
+        </strong>
+        {% if event.settings.waiting_list_enabled %}
+            <br/>
+            <a href="{% eventurl event "presale:event.waitinglist" %}?item={{ item.pk }}{% if var %}&var={{ var.pk }}{% endif %}">
+                <span class="fa fa-plus-circle"></span>
+                {% trans "Waiting list" %}
+            </a>
+        {% endif %}
     </div>
 {% endif %}

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

@@ -156,7 +156,7 @@
                                                             name="variation_{{ item.id }}_{{ var.id }}">
                                                 </div>
                                             {% else %}
-                                                {% include "pretixpresale/event/fragment_availability.html" with avail=var.cached_availability.0 %}
+                                                {% include "pretixpresale/event/fragment_availability.html" with avail=var.cached_availability.0 event=event item=item var=var %}
                                             {% endif %}
                                             <div class="clearfix"></div>
                                         </div>
@@ -211,7 +211,7 @@
                                                 max="{{ item.order_max }}" name="item_{{ item.id }}">
                                     </div>
                                 {% else %}
-                                    {% include "pretixpresale/event/fragment_availability.html" with avail=item.cached_availability.0 %}
+                                    {% include "pretixpresale/event/fragment_availability.html" with avail=item.cached_availability.0 event=event item=item var=0 %}
                                 {% endif %}
                                 <div class="clearfix"></div>
                             </div>

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

@@ -0,0 +1,31 @@
+{% extends "pretixpresale/event/base.html" %}
+{% load i18n eventurl thumbnail bootstrap3 %}
+{% block title %}{% trans "Waiting list" %}{% endblock %}
+{% block content %}
+    <h2>{% trans "Add me to the waiting list" %}</h2>
+    <form action="" method="post">
+        {% csrf_token %}
+        <div class="form-horizontal">
+            <div class="form-group">
+                <label class="col-md-3 control-label" for="id_email">{% trans "Product" %}</label>
+                <div class="col-md-9">
+                    <input class="form-control" readonly="readonly"
+                           value="{{ item.name }}{% if variation %} – {{ variation.value }}{% endif %}">
+                </div>
+            </div>
+            {% bootstrap_form form layout='horizontal' %}
+            <div class="form-group">
+                <div class="col-md-9 col-md-offset-3">
+                    <div class="help-block">
+                        {% blocktrans trimmed %}
+                            If tickets become available again, we will inform the first persons on the waiting list. If we notify you, you'll have 48 hours time to buy a ticket until we assign it to the next person on the list.
+                        {% endblocktrans %}
+                    </div>
+                    <button type="submit" class="btn btn-primary">
+                        {% trans "Add me to the list" %}
+                    </button>
+                </div>
+            </div>
+        </div>
+    </form>
+{% endblock %}

src/pretix/presale/urls.py

@@ -7,6 +7,7 @@ import pretix.presale.views.locale
 import pretix.presale.views.order
 import pretix.presale.views.organizer
 import pretix.presale.views.user
+import pretix.presale.views.waiting
 
 # This is not a valid Django URL configuration, as the final
 # configuration is done by the pretix.multidomain package.
@@ -14,6 +15,7 @@ import pretix.presale.views.user
 event_patterns = [
     url(r'^cart/add$', pretix.presale.views.cart.CartAdd.as_view(), name='event.cart.add'),
     url(r'^cart/remove$', pretix.presale.views.cart.CartRemove.as_view(), name='event.cart.remove'),
+    url(r'^waitinglist', pretix.presale.views.waiting.WaitingView.as_view(), name='event.waitinglist'),
     url(r'^checkout/start$', pretix.presale.views.checkout.CheckoutView.as_view(), name='event.checkout.start'),
     url(r'^redeem$', pretix.presale.views.cart.RedeemView.as_view(),
         name='event.redeem'),

src/pretix/presale/views/waiting.py

@@ -0,0 +1,76 @@
+from django.contrib import messages
+from django.shortcuts import redirect
+from django.utils import translation
+from django.utils.functional import cached_property
+from django.utils.translation import ugettext_lazy as _
+from django.views.generic import FormView
+
+from ...base.models import Item, ItemVariation, WaitingListEntry
+from ...multidomain.urlreverse import eventreverse
+from ..forms.waitinglist import WaitingListForm
+
+
+class WaitingView(FormView):
+    template_name = 'pretixpresale/event/waitinglist.html'
+    form_class = WaitingListForm
+
+    def get_form_kwargs(self):
+        kwargs = super().get_form_kwargs()
+        kwargs['event'] = self.request.event
+        kwargs['instance'] = WaitingListEntry(
+            item=self.item_and_variation[0], variation=self.item_and_variation[1],
+            event=self.request.event, locale=translation.get_language()
+        )
+        return kwargs
+
+    def get_context_data(self, **kwargs):
+        ctx = super().get_context_data()
+        ctx['event'] = self.request.event
+        ctx['item'], ctx['variation'] = self.item_and_variation
+        return ctx
+
+    @cached_property
+    def item_and_variation(self):
+        try:
+            item = self.request.event.items.get(pk=self.request.GET.get('item'))
+            if 'var' in self.request.GET:
+                var = item.variations.get(pk=self.request.GET['var'])
+            elif item.has_variations:
+                return None
+            else:
+                var = None
+            return item, var
+        except (Item.DoesNotExist, ItemVariation.DoesNotExist):
+            return None
+
+    def dispatch(self, request, *args, **kwargs):
+        self.request = request
+
+        if not self.request.event.settings.waiting_list_enabled:
+            messages.error(request, _("Waiting lists are disabled for this event."))
+            return redirect(eventreverse(self.request.event, 'presale:event.index'))
+
+        if not self.item_and_variation:
+            messages.error(request, _("We could not identify the product you selected."))
+            return redirect(eventreverse(self.request.event, 'presale:event.index'))
+
+        return super().dispatch(request, *args, **kwargs)
+
+    def form_valid(self, form):
+        availability = (
+            self.item_and_variation[1].check_quotas(count_waitinglist=False)
+            if self.item_and_variation[1]
+            else self.item_and_variation[0].check_quotas(count_waitinglist=False)
+        )
+        if availability[0] == 100:
+            messages.error(self.request, _("You cannot add yourself to the waiting list as this product ist currently "
+                                           "available."))
+            return redirect(eventreverse(self.request.event, 'presale:event.index'))
+
+        form.save()
+        messages.success(self.request, _("We've added you to the waiting list. You will receive "
+                                         "an email as soon as tickets get available again."))
+        return super().form_valid(form)
+
+    def get_success_url(self):
+        return eventreverse(self.request.event, 'presale:event.index')