events/batch: add event batching mechanism [AUTH-134]

authentik/events/api/events.py

@@ -37,6 +37,7 @@ class EventSerializer(ModelSerializer):
             "created",
             "expires",
             "tenant",
+            "batch_id",
         ]
 
 

authentik/events/api/notification_transports.py

@@ -52,6 +52,9 @@ class NotificationTransportSerializer(ModelSerializer):
             "webhook_url",
             "webhook_mapping",
             "send_once",
+            "enable_batching",
+            "batch_timeout",
+            "max_batch_size",
         ]
 
 

authentik/events/models.py

@@ -161,6 +161,63 @@ class EventManager(Manager):
         return self.get_queryset().get_events_per(time_since, extract, data_points)
 
 
+class EventBatch(ExpiringModel):
+    """Model to store information about batches of events."""
+
+    batch_id = models.UUIDField(primary_key=True, default=uuid4, editable=False)
+    event_type = models.CharField(max_length=255)
+    event_app = models.CharField(max_length=255)
+    event_user = models.CharField(max_length=255)
+    start_time = models.DateTimeField(auto_now_add=True)
+    end_time = models.DateTimeField(null=True, blank=True)
+    event_count = models.IntegerField(default=0)
+    last_updated = models.DateTimeField(auto_now=True)
+    max_batch_size = models.IntegerField(default=10)
+    batch_timeout = models.IntegerField(default=60)  # Timeout in seconds
+    sent = models.BooleanField(default=False)
+
+    def add_event_to_batch(self, event):
+        """Add an event to the batch and check if it's ready to send."""
+        self.add_event(event)
+        if self.check_batch_limits():
+            self.process_batch()
+
+    @staticmethod
+    def get_or_create_batch(action, app, user):
+        """Get or create a batch for a given action."""
+        return EventBatch.objects.filter(
+            event_type=action, event_app=app, event_user=user, end_time__isnull=True
+        ).first() or EventBatch.objects.create(event_type=action, event_app=app, event_user=user)
+
+    def check_batch_limits(self):
+        """Check if the batch has reached its size or timeout limits."""
+        time_elapsed = now() - self.start_time
+        return self.event_count >= self.max_batch_size or time_elapsed >= timedelta(
+            seconds=self.batch_timeout
+        )
+
+    def add_event(self, event):
+        """Add an event to the batch."""
+        self.event_count += 1
+        self.save()
+
+    def create_batch_summary(self):
+        """Create a summary message for the batch."""
+        return f"Batched Event Summary: {self.event_type} action \
+            on {self.event_app} app by {self.event_user} user \
+            occurred {self.event_count} times between {self.start_time} and {now()}"
+
+    def process_batch(self):
+        """Process the batch and check if it's ready to send."""
+        summary_message = self.create_batch_summary()
+        return summary_message
+        
+    def send_notification(self):
+        """Send notification for this batch."""
+        # Implement the logic to send notification
+        pass
+
+
 class Event(SerializerModel, ExpiringModel):
     """An individual Audit/Metrics/Notification/Error Event"""
 
@@ -176,6 +233,8 @@ class Event(SerializerModel, ExpiringModel):
     # Shadow the expires attribute from ExpiringModel to override the default duration
     expires = models.DateTimeField(default=default_event_duration)
 
+    batch_id = models.UUIDField(null=True, blank=True)
+
     objects = EventManager()
 
     @staticmethod
@@ -197,6 +256,7 @@ class Event(SerializerModel, ExpiringModel):
             current = currentframe()
             parent = current.f_back
             app = parent.f_globals["__name__"]
+
         cleaned_kwargs = cleanse_dict(sanitize_dict(kwargs))
         event = Event(action=action, app=app, context=cleaned_kwargs)
         return event
@@ -256,6 +316,9 @@ class Event(SerializerModel, ExpiringModel):
         return self
 
     def save(self, *args, **kwargs):
+        # Creating a batch for this event in the save method
+        batch = EventBatch.get_or_create_batch(self.action, self.user, self.app)
+        self.batch_id = batch.batch_id
         if self._state.adding:
             LOGGER.info(
                 "Created Event",
@@ -315,7 +378,17 @@ class NotificationTransport(SerializerModel):
         ),
     )
 
+    enable_batching = models.BooleanField(default=False)
+    batch_timeout = models.IntegerField(default=60)  # Timeout in seconds
+    max_batch_size = models.IntegerField(default=10)
+
     def send(self, notification: "Notification") -> list[str]:
+        """Send a batched notification or a single notification"""
+        if self.enable_batching:
+            return self.process_batch(notification)
+        return self.send_notification(notification)
+
+    def send_notification(self, notification: "Notification") -> list[str]:
         """Send notification to user, called from async task"""
         if self.mode == TransportMode.LOCAL:
             return self.send_local(notification)

authentik/events/tasks.py

@@ -2,11 +2,13 @@
 from typing import Optional
 
 from django.db.models.query_utils import Q
+from django.utils import timezone
 from guardian.shortcuts import get_anonymous_user
 from structlog.stdlib import get_logger
 
 from authentik.core.exceptions import PropertyMappingExpressionException
 from authentik.core.models import User
+from authentik.events.models import EventBatch  # Importing the EventBatch model
 from authentik.events.models import (
     Event,
     Notification,
@@ -19,6 +21,7 @@ from authentik.events.monitored_tasks import (
     TaskResult,
     TaskResultStatus,
     prefill_task,
+    shared_task,
 )
 from authentik.policies.engine import PolicyEngine
 from authentik.policies.models import PolicyBinding, PolicyEngineMode
@@ -110,19 +113,36 @@ def notification_transport(
         event = Event.objects.filter(pk=event_pk).first()
         if not event:
             return
+
         user = User.objects.filter(pk=user_pk).first()
         if not user:
             return
         trigger = NotificationRule.objects.filter(pk=trigger_pk).first()
         if not trigger:
             return
+
+        # Check if batching is enabled and process accordingly
+        transport = NotificationTransport.objects.filter(pk=transport_pk).first()
+        if transport and transport.enable_batching:
+            # Process the event for batching
+            batch = EventBatch.get_or_create_batch(event.action, event.app, event.user)
+            batch.add_event_to_batch(event)
+            # Check if the batch has reached its limits
+            if not batch.check_batch_limits():
+                return
+
+            batch_summary = batch.process_batch()
+            batch.delete()
+            notification = Notification(
+                severity=trigger.severity, body=batch_summary, event=event, user=user
+            )
+        else:
             notification = Notification(
                 severity=trigger.severity, body=event.summary, event=event, user=user
             )
-        transport = NotificationTransport.objects.filter(pk=transport_pk).first()
+
-        if not transport:
+        transport.send_notification(notification)
-            return
+
-        transport.send(notification)
         self.set_status(TaskResult(TaskResultStatus.SUCCESSFUL))
     except (NotificationTransportError, PropertyMappingExpressionException) as exc:
         self.set_status(TaskResult(TaskResultStatus.ERROR).with_error(exc))
@@ -147,3 +167,16 @@ def notification_cleanup(self: MonitoredTask):
         notification.delete()
     LOGGER.debug("Expired notifications", amount=amount)
     self.set_status(TaskResult(TaskResultStatus.SUCCESSFUL, [f"Expired {amount} Notifications"]))
+
+# Scheduled task to check and send pending batches
+@CELERY_APP.task(base=MonitoredTask)
+@shared_task
+def check_and_send_pending_batches():
+    """Check for pending batches that haven't been sent and have been idle for a specified time."""
+    idle_time = timezone.now() - timedelta(minutes=10)  # Example idle time
+    pending_batches = EventBatch.objects.filter(sent=False, last_updated__lt=idle_time)
+    for batch in pending_batches:
+        batch.send_notification()
+        batch.sent = True
+        batch.save()
+

blueprints/schema.json

@@ -3022,6 +3022,11 @@
                     "type": "object",
                     "additionalProperties": true,
                     "title": "Tenant"
+                },
+                "batch_id": {
+                    "type": "string",
+                    "format": "uuid",
+                    "title": "Batch id"
                 }
             },
             "required": []
@@ -3056,6 +3061,22 @@
                     "type": "boolean",
                     "title": "Send once",
                     "description": "Only send notification once, for example when sending a webhook into a chat channel."
+                },
+                "enable_batching": {
+                    "type": "boolean",
+                    "title": "Enable batching"
+                },
+                "batch_timeout": {
+                    "type": "integer",
+                    "minimum": -2147483648,
+                    "maximum": 2147483647,
+                    "title": "Batch timeout"
+                },
+                "max_batch_size": {
+                    "type": "integer",
+                    "minimum": -2147483648,
+                    "maximum": 2147483647,
+                    "title": "Max batch size"
                 }
             },
             "required": []
@@ -3131,6 +3152,11 @@
                             "type": "object",
                             "additionalProperties": true,
                             "title": "Tenant"
+                        },
+                        "batch_id": {
+                            "type": "string",
+                            "format": "uuid",
+                            "title": "Batch id"
                         }
                     },
                     "required": [

schema.yml

@@ -31489,6 +31489,10 @@ components:
           type: string
           format: date-time
         tenant: {}
+        batch_id:
+          type: string
+          format: uuid
+          nullable: true
       required:
       - action
       - app
@@ -31988,6 +31992,10 @@ components:
           type: string
           format: date-time
         tenant: {}
+        batch_id:
+          type: string
+          format: uuid
+          nullable: true
       required:
       - action
       - app
@@ -34539,6 +34547,16 @@ components:
           type: boolean
           description: Only send notification once, for example when sending a webhook
             into a chat channel.
+        enable_batching:
+          type: boolean
+        batch_timeout:
+          type: integer
+          maximum: 2147483647
+          minimum: -2147483648
+        max_batch_size:
+          type: integer
+          maximum: 2147483647
+          minimum: -2147483648
       required:
       - mode_verbose
       - name
@@ -34575,6 +34593,16 @@ components:
           type: boolean
           description: Only send notification once, for example when sending a webhook
             into a chat channel.
+        enable_batching:
+          type: boolean
+        batch_timeout:
+          type: integer
+          maximum: 2147483647
+          minimum: -2147483648
+        max_batch_size:
+          type: integer
+          maximum: 2147483647
+          minimum: -2147483648
       required:
       - name
     NotificationTransportTest:
@@ -37521,6 +37549,10 @@ components:
           type: string
           format: date-time
         tenant: {}
+        batch_id:
+          type: string
+          format: uuid
+          nullable: true
     PatchedExpressionPolicyRequest:
       type: object
       description: Group Membership Policy Serializer
@@ -38038,6 +38070,16 @@ components:
           type: boolean
           description: Only send notification once, for example when sending a webhook
             into a chat channel.
+        enable_batching:
+          type: boolean
+        batch_timeout:
+          type: integer
+          maximum: 2147483647
+          minimum: -2147483648
+        max_batch_size:
+          type: integer
+          maximum: 2147483647
+          minimum: -2147483648
     PatchedNotificationWebhookMappingRequest:
       type: object
       description: NotificationWebhookMapping Serializer