Fix #630 -- manual check-in of attendees (#642)

* [WIP] manual check-in of attendees

This enables manual check-in of attendees.  The post-code was heavily
copied from the APIRedeemView of the pretixdroid, thus so far this seems
to be working, but I have a few questions:

The checkin-Objects generated by the pretixdroid-app have a nonce.
Should the checkin object generated here have a nonce, too?

Should the result of the check-in be noted in any other way than by the
change of the status?

* addressed review comments

* implement unit test for manual checkin

* fix style-issues

* Slight layout change

* Log who did the manual check-in

* Improve unit test to check the result of the action

src/pretix/control/logdisplay.py

@@ -1,8 +1,11 @@
 import json
 from decimal import Decimal
 
+import dateutil.parser
+import pytz
 from django.dispatch import receiver
 from django.utils import formats
+from django.utils.formats import date_format
 from django.utils.translation import pgettext_lazy, ugettext_lazy as _
 from i18nfield.strings import LazyI18nString
 
@@ -200,6 +203,21 @@ def pretixcontrol_logentry_display(sender: Event, logentry: LogEntry, **kwargs):
     if logentry.action_type.startswith('pretix.event.tickets.provider.'):
         return _('The settings of a ticket output provider have been changed.')
 
+    if logentry.action_type == 'pretix.control.views.checkin':
+        dt = dateutil.parser.parse(data.get('datetime'))
+        tz = pytz.timezone(sender.settings.timezone)
+        dt_formatted = date_format(dt.astimezone(tz), "SHORT_DATETIME_FORMAT")
+
+        if data.get('first'):
+            return _('Position #{posid} has been checked in manually at {datetime}.').format(
+                posid=data.get('positionid'),
+                datetime=dt_formatted
+            )
+        return _('Position #{posid} has been checked in again at {datetime}.').format(
+            posid=data.get('positionid'),
+            datetime=dt_formatted
+        )
+
     if logentry.action_type == 'pretix.team.member.added':
         return _('{user} has been added to the team.').format(user=data.get('email'))
 

src/pretix/control/templates/pretixcontrol/checkin/index.html

@@ -52,6 +52,7 @@
                 <table class="table table-condensed table-hover">
                     <thead>
                     <tr>
+                        <th />
                         <th>{% trans "Order code" %} <a href="?{% url_replace request 'ordering' '-code'%}"><i class="fa fa-caret-down"></i></a>
                       <a href="?{% url_replace request 'ordering' 'code'%}"><i class="fa fa-caret-up"></i></a></th>
                         <th>{% trans "Item" %} <a href="?{% url_replace request 'ordering' '-item'%}"><i class="fa fa-caret-down"></i></a>
@@ -74,6 +75,11 @@
                     {% for e in entries %}
                         {% with e.checkins.first as checkin %}
                         <tr>
+                          <td> 
+                            <input type="checkbox" name="checkin"
+                                                   id="id_checkin" class=""
+                                                                   value="{{e.pk}}"/>
+                          </td>
                             <td>
                                 <strong><a href="{% url "control:event.order" event=request.event.slug organizer=request.event.organizer.slug code=e.order.code %}">{{ e.order.code }}</a></strong>
                             </td>
@@ -107,6 +113,10 @@
                     </tbody>
                 </table>
             </div>
+            <button type="submit" class="btn btn-primary btn-save">
+                {% trans "Check-In selected attendees" %}
+            </button>
         </form>
+        {% include "pretixcontrol/pagination.html" %}
     {% endif %}
 {% endblock %}

src/pretix/control/views/checkin.py

@@ -1,8 +1,13 @@
+from django.contrib import messages
+from django.core.urlresolvers import reverse
 from django.db.models import F, Prefetch, Q
 from django.db.models.functions import Coalesce
+from django.shortcuts import redirect
+from django.utils.timezone import now
+from django.utils.translation import ugettext_lazy as _
 from django.views.generic import ListView
 
-from pretix.base.models import Checkin, Item, OrderPosition
+from pretix.base.models import Checkin, Item, Order, OrderPosition
 from pretix.control.permissions import EventPermissionRequiredMixin
 
 
@@ -69,6 +74,31 @@ class CheckInView(EventPermissionRequiredMixin, ListView):
                            or "subevent" in self.request.GET)
         return ctx
 
+    def post(self, request, *args, **kwargs):
+        positions = OrderPosition.objects.select_related('item', 'variation', 'order', 'addon_to').filter(
+            order__event=self.request.event,
+            pk__in=request.POST.getlist('checkin')
+        )
+
+        for op in positions:
+            created = False
+            if op.order.status == Order.STATUS_PAID:
+                ci, created = Checkin.objects.get_or_create(position=op, defaults={
+                    'datetime': now(),
+                })
+            op.order.log_action('pretix.control.views.checkin', data={
+                'position': op.id,
+                'positionid': op.positionid,
+                'first': created,
+                'datetime': now()
+            }, user=request.user)
+
+        messages.success(request, _('The selected tickets have been marked as checked in.'))
+        return redirect(reverse('control:event.orders.checkins', kwargs={
+            'event': self.request.event.slug,
+            'organizer': self.request.event.organizer.slug
+        }) + '?' + request.GET.urlencode())
+
     @staticmethod
     def get_ordering_keys_mappings():
         return {