Log entries: Check config before bulk-scheduling

src/pretix/api/models.py

@@ -22,6 +22,7 @@
 from datetime import timedelta
 
 from django.db import models
+from django.db.models import Exists, OuterRef, Q
 from django.urls import reverse
 from django.utils.timezone import now
 from django.utils.translation import gettext_lazy as _
@@ -111,6 +112,24 @@ class OAuthRefreshToken(AbstractRefreshToken):
     )
 
 
+class WebHookQuerySet(models.QuerySet):
+    def for_notification(self, action_type, organizer, event):
+        event_listener = WebHookEventListener.objects.filter(
+            webhook=OuterRef('pk'),
+            action_type=action_type
+        )
+        webhooks = WebHook.objects.annotate(has_el=Exists(event_listener)).filter(
+            organizer=organizer,
+            has_el=True,
+            enabled=True
+        )
+        if event:
+            webhooks = webhooks.filter(
+                Q(all_events=True) | Q(limit_events__pk=event.pk if not isinstance(event, int) else event)
+            )
+        return webhooks
+
+
 class WebHook(models.Model):
     organizer = models.ForeignKey('pretixbase.Organizer', on_delete=models.CASCADE, related_name='webhooks')
     enabled = models.BooleanField(default=True, verbose_name=_("Enable webhook"))
@@ -119,6 +138,8 @@ class WebHook(models.Model):
     limit_events = models.ManyToManyField('pretixbase.Event', verbose_name=_("Limit to events"), blank=True)
     comment = models.CharField(verbose_name=_("Comment"), max_length=255, null=True, blank=True)
 
+    objects = models.Manager.from_queryset(WebHookQuerySet)()
+
     class Meta:
         ordering = ('id',)
 

src/pretix/api/webhooks.py

@@ -27,16 +27,13 @@ from datetime import timedelta
 
 import requests
 from django.db import DatabaseError, connection, transaction
-from django.db.models import Exists, OuterRef, Q
 from django.dispatch import receiver
 from django.utils.timezone import now
 from django.utils.translation import gettext_lazy as _, pgettext_lazy
 from django_scopes import scope, scopes_disabled
 from requests import RequestException
 
-from pretix.api.models import (
-    WebHook, WebHookCall, WebHookCallRetry, WebHookEventListener,
-)
+from pretix.api.models import WebHook, WebHookCall, WebHookCallRetry
 from pretix.api.signals import register_webhook_events
 from pretix.base.models import LogEntry
 from pretix.base.services.tasks import ProfiledTask, TransactionAwareTask
@@ -454,20 +451,9 @@ def notify_webhooks(logentry_ids: list):
             _org = logentry.organizer
             _at = logentry.action_type
 
-            # All webhooks that registered for this notification
-            event_listener = WebHookEventListener.objects.filter(
-                webhook=OuterRef('pk'),
-                action_type=notification_type.action_type
+            webhooks = WebHook.objects.for_notification(
+                notification_type.action_type, logentry.organizer, logentry.event_id
             )
-            webhooks = WebHook.objects.annotate(has_el=Exists(event_listener)).filter(
-                organizer=logentry.organizer,
-                has_el=True,
-                enabled=True
-            )
-            if logentry.event_id:
-                webhooks = webhooks.filter(
-                    Q(all_events=True) | Q(limit_events__pk=logentry.event_id)
-                )
 
         for wh in webhooks:
             send_webhook.apply_async(args=(logentry.id, notification_type.action_type, wh.pk))

src/pretix/base/models/log.py

@@ -38,8 +38,11 @@ import logging
 from django.contrib.contenttypes.fields import GenericForeignKey
 from django.contrib.contenttypes.models import ContentType
 from django.db import connections, models
+from django.db.models import Q
 from django.utils.functional import cached_property
 
+from pretix.api.models import WebHook
+
 
 class VisibleOnlyManager(models.Manager):
     def get_queryset(self):
@@ -181,12 +184,56 @@ class LogEntry(models.Model):
     @classmethod
     def bulk_postprocess(cls, objects):
         from pretix.api.webhooks import notify_webhooks
+        from pretix.base.models import NotificationSetting
 
         from ..services.notifications import notify
 
-        to_notify = [o.id for o in objects if o.notification_type]
+        # Regular LogEntry.save() always kicks off notify and notify_webhooks tasks, regardless of whether a webhook
+        # listener exists. However, in bulk processing, it makes sense to check once and then only create the task if
+        # there is something to do.
+        _webhook_active_cache = {}
+        _notification_active_cache = {}
+
+        def _is_webhook_active(logentry):
+            nonlocal _webhook_active_cache
+
+            key = (logentry.action_type, logentry.organizer_id, logentry.event_id)
+            if key not in _webhook_active_cache:
+                notification_type = logentry.webhook_type
+                _webhook_active_cache[key] = notification_type and WebHook.objects.for_notification(
+                    notification_type.action_type, logentry.organizer, logentry.event_id
+                ).exists()
+            return _webhook_active_cache[key]
+
+        def _is_notification_active(logentry):
+            nonlocal _notification_active_cache
+
+            key = (logentry.action_type, logentry.organizer_id, logentry.event_id)
+            if key not in _notification_active_cache:
+                notification_type = logentry.notification_type
+                if notification_type and logentry.event:
+                    # We only have event-related notifications right now
+                    users = logentry.event.get_users_with_permission(
+                        notification_type.required_permission
+                    ).filter(notifications_send=True, is_active=True)
+
+                    _notification_active_cache[key] = NotificationSetting.objects.filter(
+                        # This is not technically fully correct since it's returning True if a user has the
+                        # notification enabled on the global level and then disabled on the per-event-level,
+                        # but it's good enough as a first check to avoid useless celery tasks for bulk actions
+                        Q(event_id=logentry.event_id) | Q(event__isnull=True),
+                        action_type=notification_type.action_type,
+                        user__pk__in=users.values_list('pk', flat=True),
+                        enabled=True,
+                    ).exists()
+
+                else:
+                    _webhook_active_cache[key] = False
+            return _notification_active_cache[key]
+
+        to_notify = [o.id for o in objects if _is_notification_active(o)]
         if to_notify:
             notify.apply_async(args=(to_notify,))
-        to_wh = [o.id for o in objects if o.webhook_type]
+        to_wh = [o.id for o in objects if _is_webhook_active(o)]
         if to_wh:
             notify_webhooks.apply_async(args=(to_wh,))