Add internal comment to events

src/pretix/control/views/event.py

@@ -8,7 +8,9 @@ from django.contrib.contenttypes.models import ContentType
 from django.core.files import File
 from django.core.urlresolvers import reverse
 from django.db import transaction
-from django.http import HttpResponse, HttpResponseBadRequest, JsonResponse
+from django.http import (
+    HttpResponse, HttpResponseBadRequest, HttpResponseNotAllowed, JsonResponse,
+)
 from django.shortcuts import get_object_or_404, redirect
 from django.utils import translation
 from django.utils.formats import date_format
@@ -28,7 +30,7 @@ from pretix.base.services import tickets
 from pretix.base.services.invoices import build_preview_invoice_pdf
 from pretix.base.signals import event_live_issues, register_ticket_outputs
 from pretix.control.forms.event import (
-    DisplaySettingsForm, EventSettingsForm, EventUpdateForm,
+    CommentForm, DisplaySettingsForm, EventSettingsForm, EventUpdateForm,
     InvoiceSettingsForm, MailSettingsForm, PaymentSettingsForm, ProviderForm,
     TicketSettingsForm,
 )
@@ -757,3 +759,29 @@ class EventActionDiscard(EventPermissionRequiredMixin, View):
             'organizer': self.request.event.organizer.slug,
             'event': self.request.event.slug
         })
+
+
+class EventComment(EventPermissionRequiredMixin, View):
+    permission = 'can_change_event_settings'
+
+    def post(self, *args, **kwargs):
+        form = CommentForm(self.request.POST)
+        if form.is_valid():
+            self.request.event.comment = form.cleaned_data.get('comment')
+            self.request.event.save()
+            self.request.event.log_action('pretix.event.comment', user=self.request.user, data={
+                'new_comment': form.cleaned_data.get('comment')
+            })
+            messages.success(self.request, _('The comment has been updated.'))
+        else:
+            messages.error(self.request, _('Could not update the comment.'))
+        return redirect(self.get_success_url())
+
+    def get(self, *args, **kwargs):
+        return HttpResponseNotAllowed(['POST'])
+
+    def get_success_url(self) -> str:
+        return reverse('control:event.index', kwargs={
+            'organizer': self.request.event.organizer.slug,
+            'event': self.request.event.slug
+        })