Initial work on #15621

netbox/account/urls.py

@@ -9,6 +9,8 @@ urlpatterns = [
     # Account views
     path('profile/', views.ProfileView.as_view(), name='profile'),
     path('bookmarks/', views.BookmarkListView.as_view(), name='bookmarks'),
+    path('notifications/', views.NotificationListView.as_view(), name='notifications'),
+    path('subscriptions/', views.SubscriptionListView.as_view(), name='subscriptions'),
     path('preferences/', views.UserConfigView.as_view(), name='preferences'),
     path('password/', views.ChangePasswordView.as_view(), name='change_password'),
     path('api-tokens/', views.UserTokenListView.as_view(), name='usertoken_list'),

netbox/account/views.py

@@ -21,8 +21,8 @@ from social_core.backends.utils import load_backends
 from account.models import UserToken
 from core.models import ObjectChange
 from core.tables import ObjectChangeTable
-from extras.models import Bookmark
-from extras.tables import BookmarkTable
+from extras.models import Bookmark, Notification, Subscription
+from extras.tables import BookmarkTable, NotificationTable, SubscriptionTable
 from netbox.authentication import get_auth_backend_display, get_saml_idps
 from netbox.config import get_config
 from netbox.views import generic
@@ -267,6 +267,36 @@ class BookmarkListView(LoginRequiredMixin, generic.ObjectListView):
         }
 
 
+#
+# Notifications & subscriptions
+#
+
+class NotificationListView(LoginRequiredMixin, generic.ObjectListView):
+    table = NotificationTable
+    template_name = 'account/notifications.html'
+
+    def get_queryset(self, request):
+        return Notification.objects.filter(user=request.user)
+
+    def get_extra_context(self, request):
+        return {
+            'active_tab': 'notifications',
+        }
+
+
+class SubscriptionListView(LoginRequiredMixin, generic.ObjectListView):
+    table = SubscriptionTable
+    template_name = 'account/subscriptions.html'
+
+    def get_queryset(self, request):
+        return Subscription.objects.filter(user=request.user)
+
+    def get_extra_context(self, request):
+        return {
+            'active_tab': 'subscriptions',
+        }
+
+
 #
 # User views for token management
 #

netbox/extras/api/serializers.py

@@ -7,6 +7,7 @@ from .serializers_.dashboard import *
 from .serializers_.events import *
 from .serializers_.exporttemplates import *
 from .serializers_.journaling import *
+from .serializers_.notifications import *
 from .serializers_.configcontexts import *
 from .serializers_.configtemplates import *
 from .serializers_.savedfilters import *

netbox/extras/api/serializers_/notifications.py

@@ -0,0 +1,82 @@
+from drf_spectacular.utils import extend_schema_field
+from rest_framework import serializers
+
+from core.models import ObjectType
+from extras.models import Notification, Subscription
+from netbox.api.fields import ContentTypeField, SerializedPKRelatedField
+from netbox.api.serializers import ValidatedModelSerializer
+from users.api.serializers_.users import GroupSerializer, UserSerializer
+from users.models import Group, User
+from utilities.api import get_serializer_for_model
+
+__all__ = (
+    'NotificationSerializer',
+    'NotificationGroupSerializer',
+    'SubscriptionSerializer',
+)
+
+
+class NotificationSerializer(ValidatedModelSerializer):
+    object_type = ContentTypeField(
+        queryset=ObjectType.objects.with_feature('notifications'),
+    )
+    object = serializers.SerializerMethodField(read_only=True)
+    user = UserSerializer(nested=True)
+
+    class Meta:
+        model = Notification
+        fields = [
+            'id', 'url', 'display', 'object_type', 'object_id', 'object', 'user', 'created', 'read', 'kind', 'event',
+        ]
+        brief_fields = ('id', 'url', 'display', 'object_type', 'object_id', 'user', 'kind', 'event')
+
+    @extend_schema_field(serializers.JSONField(allow_null=True))
+    def get_object(self, instance):
+        serializer = get_serializer_for_model(instance.object)
+        context = {'request': self.context['request']}
+        return serializer(instance.object, nested=True, context=context).data
+
+
+class NotificationGroupSerializer(ValidatedModelSerializer):
+    groups = SerializedPKRelatedField(
+        queryset=Group.objects.all(),
+        serializer=GroupSerializer,
+        nested=True,
+        required=False,
+        many=True
+    )
+    users = SerializedPKRelatedField(
+        queryset=User.objects.all(),
+        serializer=UserSerializer,
+        nested=True,
+        required=False,
+        many=True
+    )
+
+    class Meta:
+        model = Notification
+        fields = [
+            'id', 'url', 'display', 'name', 'description', 'object', 'groups', 'users',
+        ]
+        brief_fields = ('id', 'url', 'display', 'name', 'description')
+
+
+class SubscriptionSerializer(ValidatedModelSerializer):
+    object_type = ContentTypeField(
+        queryset=ObjectType.objects.with_feature('notifications'),
+    )
+    object = serializers.SerializerMethodField(read_only=True)
+    user = UserSerializer(nested=True)
+
+    class Meta:
+        model = Subscription
+        fields = [
+            'id', 'url', 'display', 'object_type', 'object_id', 'object', 'user', 'created',
+        ]
+        brief_fields = ('id', 'url', 'display', 'object_id', 'object_type')
+
+    @extend_schema_field(serializers.JSONField(allow_null=True))
+    def get_object(self, instance):
+        serializer = get_serializer_for_model(instance.object)
+        context = {'request': self.context['request']}
+        return serializer(instance.object, nested=True, context=context).data

netbox/extras/api/urls.py

@@ -15,6 +15,9 @@ router.register('custom-links', views.CustomLinkViewSet)
 router.register('export-templates', views.ExportTemplateViewSet)
 router.register('saved-filters', views.SavedFilterViewSet)
 router.register('bookmarks', views.BookmarkViewSet)
+router.register('notifications', views.NotificationViewSet)
+router.register('notification-groups', views.NotificationGroupViewSet)
+router.register('subscriptions', views.SubscriptionViewSet)
 router.register('tags', views.TagViewSet)
 router.register('image-attachments', views.ImageAttachmentViewSet)
 router.register('journal-entries', views.JournalEntryViewSet)

netbox/extras/api/views.py

@@ -140,6 +140,28 @@ class BookmarkViewSet(NetBoxModelViewSet):
     filterset_class = filtersets.BookmarkFilterSet
 
 
+#
+# Notifications & subscriptions
+#
+
+class NotificationViewSet(NetBoxModelViewSet):
+    metadata_class = ContentTypeMetadata
+    queryset = Notification.objects.all()
+    serializer_class = serializers.NotificationSerializer
+
+
+class NotificationGroupViewSet(NetBoxModelViewSet):
+    metadata_class = ContentTypeMetadata
+    queryset = NotificationGroup.objects.all()
+    serializer_class = serializers.NotificationGroupSerializer
+
+
+class SubscriptionViewSet(NetBoxModelViewSet):
+    metadata_class = ContentTypeMetadata
+    queryset = Subscription.objects.all()
+    serializer_class = serializers.SubscriptionSerializer
+
+
 #
 # Tags
 #

netbox/extras/choices.py

@@ -148,6 +148,41 @@ class JournalEntryKindChoices(ChoiceSet):
     ]
 
 
+#
+# Notifications
+#
+
+class NotificationKindChoices(ChoiceSet):
+    key = 'Notification.kind'
+
+    KIND_INFO = 'info'
+    KIND_SUCCESS = 'success'
+    KIND_WARNING = 'warning'
+    KIND_DANGER = 'danger'
+
+    CHOICES = [
+        (KIND_INFO, _('Info'), 'cyan'),
+        (KIND_SUCCESS, _('Success'), 'green'),
+        (KIND_WARNING, _('Warning'), 'yellow'),
+        (KIND_DANGER, _('Danger'), 'red'),
+    ]
+
+
+# TODO: Support dynamic entries from plugins
+class NotificationEventChoices(ChoiceSet):
+    key = 'Notification.event'
+
+    OBJECT_CREATED = 'object_created'
+    OBJECT_CHANGED = 'object_changed'
+    OBJECT_DELETED = 'object_deleted'
+
+    CHOICES = [
+        (OBJECT_CREATED, _('Object created')),
+        (OBJECT_CHANGED, _('Object changed')),
+        (OBJECT_DELETED, _('Object deleted')),
+    ]
+
+
 #
 # Reports and Scripts
 #

netbox/extras/filtersets.py

@@ -8,6 +8,7 @@ from core.models import DataSource, ObjectType
 from dcim.models import DeviceRole, DeviceType, Location, Platform, Region, Site, SiteGroup
 from netbox.filtersets import BaseFilterSet, ChangeLoggedModelFilterSet, NetBoxModelFilterSet
 from tenancy.models import Tenant, TenantGroup
+from users.models import Group
 from utilities.filters import ContentTypeFilter, MultiValueCharFilter, MultiValueNumberFilter
 from virtualization.models import Cluster, ClusterGroup, ClusterType
 from .choices import *
@@ -26,6 +27,7 @@ __all__ = (
     'ImageAttachmentFilterSet',
     'JournalEntryFilterSet',
     'LocalConfigContextFilterSet',
+    'NotificationGroupFilterSet',
     'ObjectTypeFilterSet',
     'SavedFilterFilterSet',
     'ScriptFilterSet',
@@ -336,6 +338,35 @@ class BookmarkFilterSet(BaseFilterSet):
         fields = ('id', 'object_id')
 
 
+class NotificationGroupFilterSet(BaseFilterSet):
+    q = django_filters.CharFilter(
+        method='search',
+        label=_('Search'),
+    )
+    # user_id = django_filters.ModelMultipleChoiceFilter(
+    #     queryset=get_user_model().objects.all(),
+    #     label=_('User (ID)'),
+    # )
+    # group_id = django_filters.ModelMultipleChoiceFilter(
+    #     queryset=Group.objects.all(),
+    #     label=_('Group (ID)'),
+    # )
+
+    class Meta:
+        model = NotificationGroup
+        fields = (
+            'id', 'name', 'description',
+        )
+
+    def search(self, queryset, name, value):
+        if not value.strip():
+            return queryset
+        return queryset.filter(
+            Q(name__icontains=value) |
+            Q(description__icontains=value)
+        )
+
+
 class ImageAttachmentFilterSet(ChangeLoggedModelFilterSet):
     q = django_filters.CharFilter(
         method='search',

netbox/extras/forms/bulk_edit.py

@@ -343,3 +343,17 @@ class JournalEntryBulkEditForm(BulkEditForm):
         required=False
     )
     comments = CommentField()
+
+
+class NotificationGroupBulkEditForm(BulkEditForm):
+    pk = forms.ModelMultipleChoiceField(
+        queryset=NotificationGroup.objects.all(),
+        widget=forms.MultipleHiddenInput
+    )
+    description = forms.CharField(
+        label=_('Description'),
+        max_length=200,
+        required=False
+    )
+
+    nullable_fields = ('description',)

netbox/extras/forms/bulk_import.py

@@ -23,6 +23,7 @@ __all__ = (
     'EventRuleImportForm',
     'ExportTemplateImportForm',
     'JournalEntryImportForm',
+    'NotificationGroupImportForm',
     'SavedFilterImportForm',
     'TagImportForm',
     'WebhookImportForm',
@@ -250,3 +251,10 @@ class JournalEntryImportForm(NetBoxModelImportForm):
         fields = (
             'assigned_object_type', 'assigned_object_id', 'created_by', 'kind', 'comments', 'tags'
         )
+
+
+class NotificationGroupImportForm(CSVModelForm):
+
+    class Meta:
+        model = NotificationGroup
+        fields = ('name', 'description')

netbox/extras/forms/filtersets.py

@@ -9,6 +9,7 @@ from extras.models import *
 from netbox.forms.base import NetBoxModelFilterSetForm
 from netbox.forms.mixins import SavedFiltersMixin
 from tenancy.models import Tenant, TenantGroup
+from users.models import Group
 from utilities.forms import BOOLEAN_WITH_BLANK_CHOICES, FilterForm, add_blank_choice
 from utilities.forms.fields import (
     ContentTypeChoiceField, ContentTypeMultipleChoiceField, DynamicModelMultipleChoiceField, TagFilterField,
@@ -28,6 +29,7 @@ __all__ = (
     'ImageAttachmentFilterForm',
     'JournalEntryFilterForm',
     'LocalConfigContextFilterForm',
+    'NotificationGroupFilterForm',
     'SavedFilterFilterForm',
     'TagFilterForm',
     'WebhookFilterForm',
@@ -496,3 +498,16 @@ class JournalEntryFilterForm(NetBoxModelFilterSetForm):
         required=False
     )
     tag = TagFilterField(model)
+
+
+class NotificationGroupFilterForm(SavedFiltersMixin, FilterForm):
+    user_id = DynamicModelMultipleChoiceField(
+        queryset=get_user_model().objects.all(),
+        required=False,
+        label=_('User')
+    )
+    group_id = DynamicModelMultipleChoiceField(
+        queryset=Group.objects.all(),
+        required=False,
+        label=_('Group')
+    )

netbox/extras/forms/model_forms.py

@@ -12,6 +12,7 @@ from extras.choices import *
 from extras.models import *
 from netbox.forms import NetBoxModelForm
 from tenancy.models import Tenant, TenantGroup
+from users.models import Group, User
 from utilities.forms import add_blank_choice, get_field_value
 from utilities.forms.fields import (
     CommentField, ContentTypeChoiceField, ContentTypeMultipleChoiceField, DynamicModelChoiceField,
@@ -32,7 +33,9 @@ __all__ = (
     'ExportTemplateForm',
     'ImageAttachmentForm',
     'JournalEntryForm',
+    'NotificationGroupForm',
     'SavedFilterForm',
+    'SubscriptionForm',
     'TagForm',
     'WebhookForm',
 )
@@ -238,6 +241,34 @@ class BookmarkForm(forms.ModelForm):
         fields = ('object_type', 'object_id')
 
 
+class NotificationGroupForm(forms.ModelForm):
+    groups = DynamicModelMultipleChoiceField(
+        label=_('Groups'),
+        required=False,
+        queryset=Group.objects.all()
+    )
+    users = DynamicModelMultipleChoiceField(
+        label=_('Users'),
+        required=False,
+        queryset=User.objects.all()
+    )
+
+    class Meta:
+        model = NotificationGroup
+        fields = ('name', 'description', 'groups', 'users')
+
+
+class SubscriptionForm(forms.ModelForm):
+    object_type = ContentTypeChoiceField(
+        label=_('Object type'),
+        queryset=ObjectType.objects.with_feature('notifications')
+    )
+
+    class Meta:
+        model = Subscription
+        fields = ('object_type', 'object_id')
+
+
 class WebhookForm(NetBoxModelForm):
 
     fieldsets = (

netbox/extras/migrations/0118_notifications.py

@@ -0,0 +1,77 @@
+import django.db.models.deletion
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('contenttypes', '0002_remove_content_type_name'),
+        ('extras', '0117_customfield_uniqueness'),
+        ('users', '0009_update_group_perms'),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='NotificationGroup',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('name', models.CharField(max_length=100, unique=True)),
+                ('description', models.CharField(blank=True, max_length=200)),
+                ('groups', models.ManyToManyField(blank=True, related_name='notification_groups', to='users.group')),
+                ('users', models.ManyToManyField(blank=True, related_name='notification_groups', to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'verbose_name': 'notification group',
+                'verbose_name_plural': 'notification groups',
+                'ordering': ('name',),
+            },
+        ),
+        migrations.CreateModel(
+            name='Subscription',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('created', models.DateTimeField(auto_now_add=True)),
+                ('object_id', models.PositiveBigIntegerField()),
+                ('object_type', models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='contenttypes.contenttype')),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'verbose_name': 'subscription',
+                'verbose_name_plural': 'subscriptions',
+                'ordering': ('-created', 'user'),
+            },
+        ),
+        migrations.CreateModel(
+            name='Notification',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('created', models.DateTimeField(auto_now_add=True)),
+                ('read', models.DateTimeField(null=True)),
+                ('object_id', models.PositiveBigIntegerField()),
+                ('kind', models.CharField(default='info', max_length=30)),
+                ('event', models.CharField(max_length=30)),
+                ('object_type', models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='contenttypes.contenttype')),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='notifications', to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'verbose_name': 'notification',
+                'verbose_name_plural': 'notifications',
+                'ordering': ('-created', 'pk'),
+                'indexes': [models.Index(fields=['object_type', 'object_id'], name='extras_noti_object__be74d5_idx')],
+            },
+        ),
+        migrations.AddConstraint(
+            model_name='notification',
+            constraint=models.UniqueConstraint(fields=('object_type', 'object_id', 'user'), name='extras_notification_unique_per_object_and_user'),
+        ),
+        migrations.AddIndex(
+            model_name='subscription',
+            index=models.Index(fields=['object_type', 'object_id'], name='extras_subs_object__37ef68_idx'),
+        ),
+        migrations.AddConstraint(
+            model_name='subscription',
+            constraint=models.UniqueConstraint(fields=('object_type', 'object_id', 'user'), name='extras_subscription_unique_per_object_and_user'),
+        ),
+    ]

netbox/extras/models/__init__.py

@@ -2,6 +2,7 @@ from .configs import *
 from .customfields import *
 from .dashboard import *
 from .models import *
+from .notifications import *
 from .scripts import *
 from .search import *
 from .staging import *

netbox/extras/models/notifications.py

@@ -0,0 +1,171 @@
+from django.conf import settings
+from django.contrib.contenttypes.fields import GenericForeignKey
+from django.core.exceptions import ValidationError
+from django.db import models
+from django.utils.translation import gettext_lazy as _
+
+from core.models import ObjectType
+from extras.choices import *
+from extras.querysets import NotificationQuerySet
+from utilities.querysets import RestrictedQuerySet
+
+__all__ = (
+    'Notification',
+    'NotificationGroup',
+    'Subscription',
+)
+
+
+class Notification(models.Model):
+    """
+    A notification message for a User relating to a specific object in NetBox.
+    """
+    created = models.DateTimeField(
+        verbose_name=_('created'),
+        auto_now_add=True
+    )
+    read = models.DateTimeField(
+        verbose_name=_('read'),
+        null=True
+    )
+    user = models.ForeignKey(
+        to=settings.AUTH_USER_MODEL,
+        on_delete=models.CASCADE,
+        related_name='notifications'
+    )
+    object_type = models.ForeignKey(
+        to='contenttypes.ContentType',
+        on_delete=models.PROTECT
+    )
+    object_id = models.PositiveBigIntegerField()
+    object = GenericForeignKey(
+        ct_field='object_type',
+        fk_field='object_id'
+    )
+    kind = models.CharField(
+        verbose_name=_('kind'),
+        max_length=30,
+        choices=NotificationKindChoices,
+        default=NotificationKindChoices.KIND_INFO
+    )
+    event = models.CharField(
+        verbose_name=_('event'),
+        max_length=30,
+        choices=NotificationEventChoices
+    )
+
+    objects = NotificationQuerySet.as_manager()
+
+    class Meta:
+        ordering = ('-created', 'pk')
+        indexes = (
+            models.Index(fields=('object_type', 'object_id')),
+        )
+        constraints = (
+            models.UniqueConstraint(
+                fields=('object_type', 'object_id', 'user'),
+                name='%(app_label)s_%(class)s_unique_per_object_and_user'
+            ),
+        )
+        verbose_name = _('notification')
+        verbose_name_plural = _('notifications')
+
+    def __str__(self):
+        if self.object:
+            return str(self.object)
+        return super().__str__()
+
+    def get_absolute_url(self):
+        return self.object.get_absolute_url()
+
+    def clean(self):
+        super().clean()
+
+        # Validate the assigned object type
+        if self.object_type not in ObjectType.objects.with_feature('notifications'):
+            raise ValidationError(
+                _("Objects of this type ({type}) do not support notifications.").format(type=self.object_type)
+            )
+
+
+class NotificationGroup(models.Model):
+    """
+    A collection of users and/or groups to be informed for certain notifications.
+    """
+    name = models.CharField(
+        verbose_name=_('name'),
+        max_length=100,
+        unique=True
+    )
+    description = models.CharField(
+        verbose_name=_('description'),
+        max_length=200,
+        blank=True
+    )
+    groups = models.ManyToManyField(
+        to='users.Group',
+        verbose_name=_('groups'),
+        blank=True,
+        related_name='notification_groups'
+    )
+    users = models.ManyToManyField(
+        to='users.User',
+        verbose_name=_('users'),
+        blank=True,
+        related_name='notification_groups'
+    )
+
+    objects = RestrictedQuerySet.as_manager()
+
+    class Meta:
+        ordering = ('name',)
+        verbose_name = _('notification group')
+        verbose_name_plural = _('notification groups')
+
+
+class Subscription(models.Model):
+    """
+    A User's subscription to a particular object, to be notified of changes.
+    """
+    created = models.DateTimeField(
+        verbose_name=_('created'),
+        auto_now_add=True
+    )
+    user = models.ForeignKey(
+        to=settings.AUTH_USER_MODEL,
+        on_delete=models.CASCADE
+    )
+    object_type = models.ForeignKey(
+        to='contenttypes.ContentType',
+        on_delete=models.PROTECT
+    )
+    object_id = models.PositiveBigIntegerField()
+    object = GenericForeignKey(
+        ct_field='object_type',
+        fk_field='object_id'
+    )
+
+    objects = RestrictedQuerySet.as_manager()
+
+    class Meta:
+        ordering = ('-created', 'user')
+        indexes = (
+            models.Index(fields=('object_type', 'object_id')),
+        )
+        constraints = (
+            models.UniqueConstraint(
+                fields=('object_type', 'object_id', 'user'),
+                name='%(app_label)s_%(class)s_unique_per_object_and_user'
+            ),
+        )
+        verbose_name = _('subscription')
+        verbose_name_plural = _('subscriptions')
+
+    def clean(self):
+        super().clean()
+
+        # Validate the assigned object type
+        if self.object_type not in ObjectType.objects.with_feature('notifications'):
+            raise ValidationError(
+                _("Objects of this type ({type}) do not support notifications.").format(type=self.object_type)
+            )

netbox/extras/querysets.py

@@ -5,6 +5,12 @@ from extras.models.tags import TaggedItem
 from utilities.query_functions import EmptyGroupByJSONBAgg
 from utilities.querysets import RestrictedQuerySet
 
+__all__ = (
+    'ConfigContextModelQuerySet',
+    'ConfigContextQuerySet',
+    'NotificationQuerySet',
+)
+
 
 class ConfigContextQuerySet(RestrictedQuerySet):
 
@@ -145,3 +151,9 @@ class ConfigContextModelQuerySet(RestrictedQuerySet):
         )
 
         return base_query
+
+
+class NotificationQuerySet(RestrictedQuerySet):
+
+    def unread(self):
+        return self.filter(read__isnull=True)

netbox/extras/signals.py

@@ -12,15 +12,16 @@ from django_prometheus.models import model_deletes, model_inserts, model_updates
 from core.choices import ObjectChangeActionChoices
 from core.models import ObjectChange, ObjectType
 from core.signals import job_end, job_start
+from extras.choices import NotificationEventChoices, NotificationKindChoices
 from extras.constants import EVENT_JOB_END, EVENT_JOB_START
 from extras.events import process_event_rules
-from extras.models import EventRule
+from extras.models import EventRule, Notification, Subscription
 from netbox.config import get_config
 from netbox.context import current_request, events_queue
 from netbox.models.features import ChangeLoggingMixin
 from netbox.signals import post_clean
 from utilities.exceptions import AbortRequest
-from .events import enqueue_object, get_snapshots, serialize_for_event
+from .events import enqueue_object
 from .models import CustomField, TaggedItem
 from .validators import CustomValidator
 
@@ -281,3 +282,30 @@ def process_job_end_event_rules(sender, **kwargs):
     event_rules = EventRule.objects.filter(type_job_end=True, enabled=True, object_types=sender.object_type)
     username = sender.user.username if sender.user else None
     process_event_rules(event_rules, sender.object_type.model, EVENT_JOB_END, sender.data, username)
+
+
+#
+# Notifications
+#
+
+@receiver(post_save)
+def notify_object_changed(sender, instance, **kwargs):
+    ct = ContentType.objects.get_for_model(instance)
+
+    # Find any Subscriptions for this object
+    subscriptions = Subscription.objects.filter(object_type=ct, object_id=instance.pk).values('user')
+
+    # Delete any existing Notifications for the object
+    subscribed_users = [sub['user'] for sub in subscriptions]
+    Notification.objects.filter(object_type=ct, object_id=instance.pk, user__in=subscribed_users).delete()
+
+    # Create Notifications for Subscribers
+    notifications = [
+        Notification(
+            user_id=sub['user'],
+            object=instance,
+            event=NotificationEventChoices.OBJECT_CHANGED
+        )
+        for sub in subscriptions
+    ]
+    Notification.objects.bulk_create(notifications)

netbox/extras/tables/tables.py

@@ -19,9 +19,12 @@ __all__ = (
     'ExportTemplateTable',
     'ImageAttachmentTable',
     'JournalEntryTable',
+    'NotificationGroupTable',
+    'NotificationTable',
     'SavedFilterTable',
     'ReportResultsTable',
     'ScriptResultsTable',
+    'SubscriptionTable',
     'TaggedItemTable',
     'TagTable',
     'WebhookTable',
@@ -263,6 +266,58 @@ class BookmarkTable(NetBoxTable):
         default_columns = ('object', 'object_type', 'created')
 
 
+class NotificationTable(NetBoxTable):
+    object_type = columns.ContentTypeColumn(
+        verbose_name=_('Object Types'),
+    )
+    object = tables.Column(
+        verbose_name=_('Object'),
+        linkify=True
+    )
+    created = columns.DateTimeColumn(
+        timespec='minutes',
+        verbose_name=_('Created'),
+    )
+    read = columns.DateTimeColumn(
+        timespec='minutes',
+        verbose_name=_('Read'),
+    )
+    actions = columns.ActionsColumn(
+        actions=('delete',)
+    )
+
+    class Meta(NetBoxTable.Meta):
+        model = Notification
+        fields = ('pk', 'object', 'object_type', 'created', 'read')
+        default_columns = ('object', 'object_type', 'created', 'read')
+
+
+class NotificationGroupTable(NetBoxTable):
+
+    class Meta(NetBoxTable.Meta):
+        model = NotificationGroup
+        fields = ('pk', 'name', 'description', 'groups', 'users')
+        default_columns = ('name', 'description')
+
+
+class SubscriptionTable(NetBoxTable):
+    object_type = columns.ContentTypeColumn(
+        verbose_name=_('Object Types'),
+    )
+    object = tables.Column(
+        verbose_name=_('Object'),
+        linkify=True
+    )
+    actions = columns.ActionsColumn(
+        actions=('delete',)
+    )
+
+    class Meta(NetBoxTable.Meta):
+        model = Subscription
+        fields = ('pk', 'object', 'object_type', 'created')
+        default_columns = ('object', 'object_type', 'created')
+
+
 class WebhookTable(NetBoxTable):
     name = tables.Column(
         verbose_name=_('Name'),

netbox/extras/urls.py

@@ -53,6 +53,24 @@ urlpatterns = [
     path('bookmarks/delete/', views.BookmarkBulkDeleteView.as_view(), name='bookmark_bulk_delete'),
     path('bookmarks/<int:pk>/', include(get_model_urls('extras', 'bookmark'))),
 
+    # Notification groups
+    path('notification-groups/', views.NotificationGroupListView.as_view(), name='notificationgroup_list'),
+    path('notification-groups/add/', views.NotificationGroupEditView.as_view(), name='notificationgroup_add'),
+    path('notification-groups/import/', views.NotificationGroupBulkImportView.as_view(), name='notificationgroup_import'),
+    # path('notification-groups/edit/', views.NotificationGroupBulkEditView.as_view(), name='notificationgroup_bulk_edit'),
+    path('notification-groups/delete/', views.NotificationGroupBulkDeleteView.as_view(), name='notificationgroup_bulk_delete'),
+    path('notification-groups/<int:pk>/', include(get_model_urls('extras', 'notificationgroup'))),
+
+    # Notifications
+    path('notifications/', views.NotificationsView.as_view(), name='notifications'),
+    path('notifications/delete/', views.NotificationBulkDeleteView.as_view(), name='notification_bulk_delete'),
+    path('notifications/<int:pk>/', include(get_model_urls('extras', 'notification'))),
+
+    # Subscriptions
+    path('subscriptions/add/', views.SubscriptionCreateView.as_view(), name='subscription_add'),
+    path('subscriptions/delete/', views.SubscriptionBulkDeleteView.as_view(), name='subscription_bulk_delete'),
+    path('subscriptions/<int:pk>/', include(get_model_urls('extras', 'subscription'))),
+
     # Webhooks
     path('webhooks/', views.WebhookListView.as_view(), name='webhook_list'),
     path('webhooks/add/', views.WebhookEditView.as_view(), name='webhook_add'),

netbox/extras/views.py

@@ -6,6 +6,7 @@ from django.db.models import Count, Q
 from django.http import HttpResponseBadRequest, HttpResponseForbidden, HttpResponse
 from django.shortcuts import get_object_or_404, redirect, render
 from django.urls import reverse
+from django.utils import timezone
 from django.utils.translation import gettext as _
 from django.views.generic import View
 
@@ -356,6 +357,130 @@ class BookmarkBulkDeleteView(generic.BulkDeleteView):
         return Bookmark.objects.filter(user=request.user)
 
 
+#
+# Notification groups
+#
+
+class NotificationGroupListView(generic.ObjectListView):
+    queryset = NotificationGroup.objects.all()
+    filterset = filtersets.NotificationGroupFilterSet
+    filterset_form = forms.NotificationGroupFilterForm
+    table = tables.NotificationGroupTable
+
+
+@register_model_view(NotificationGroup)
+class NotificationGroupView(generic.ObjectView):
+    queryset = NotificationGroup.objects.all()
+
+
+@register_model_view(NotificationGroup, 'edit')
+class NotificationGroupEditView(generic.ObjectEditView):
+    queryset = NotificationGroup.objects.all()
+    form = forms.NotificationGroupForm
+
+
+@register_model_view(NotificationGroup, 'delete')
+class NotificationGroupDeleteView(generic.ObjectDeleteView):
+    queryset = NotificationGroup.objects.all()
+
+
+class NotificationGroupBulkImportView(generic.BulkImportView):
+    queryset = NotificationGroup.objects.all()
+    model_form = forms.NotificationGroupImportForm
+
+
+# class NotificationGroupBulkEditView(generic.BulkEditView):
+#     queryset = NotificationGroup.objects.all()
+#     filterset = filtersets.NotificationGroupFilterSet
+#     table = tables.NotificationGroupTable
+#     form = forms.NotificationGroupBulkEditForm
+
+
+class NotificationGroupBulkDeleteView(generic.BulkDeleteView):
+    queryset = NotificationGroup.objects.all()
+    filterset = filtersets.NotificationGroupFilterSet
+    table = tables.NotificationGroupTable
+
+
+#
+# Notifications
+#
+
+class NotificationsView(LoginRequiredMixin, View):
+
+    def get(self, request):
+        notifications = Notification.objects.filter(
+            user=request.user,
+            read__isnull=True
+        )
+        return render(request, 'htmx/notifications.html', {
+            'notifications': notifications,
+        })
+
+    def post(self, request):
+        form = forms.RenderMarkdownForm(request.POST)
+        if not form.is_valid():
+            HttpResponseBadRequest()
+        rendered = render_markdown(form.cleaned_data['text'])
+
+        return HttpResponse(rendered)
+
+
+@register_model_view(Notification, 'read')
+class NotificationReadView(LoginRequiredMixin, View):
+
+    def get(self, request, pk):
+        request.user.notifications.filter(pk=pk).update(read=timezone.now())
+
+        notifications = request.user.notifications.unread()[:10]
+        return render(request, 'htmx/notifications.html', {
+            'notifications': notifications,
+        })
+
+
+@register_model_view(Notification, 'delete')
+class NotificationDeleteView(generic.ObjectDeleteView):
+
+    def get_queryset(self, request):
+        return Notification.objects.filter(user=request.user)
+
+
+class NotificationBulkDeleteView(generic.BulkDeleteView):
+    table = tables.NotificationTable
+
+    def get_queryset(self, request):
+        return Notification.objects.filter(user=request.user)
+
+
+#
+# Subscriptions
+#
+
+class SubscriptionCreateView(generic.ObjectEditView):
+    form = forms.SubscriptionForm
+
+    def get_queryset(self, request):
+        return Subscription.objects.filter(user=request.user)
+
+    def alter_object(self, obj, request, url_args, url_kwargs):
+        obj.user = request.user
+        return obj
+
+
+@register_model_view(Subscription, 'delete')
+class SubscriptionDeleteView(generic.ObjectDeleteView):
+
+    def get_queryset(self, request):
+        return Subscription.objects.filter(user=request.user)
+
+
+class SubscriptionBulkDeleteView(generic.BulkDeleteView):
+    table = tables.SubscriptionTable
+
+    def get_queryset(self, request):
+        return Subscription.objects.filter(user=request.user)
+
+
 #
 # Webhooks
 #

netbox/netbox/models/__init__.py

@@ -29,6 +29,7 @@ class NetBoxFeatureSet(
     CustomValidationMixin,
     ExportTemplatesMixin,
     JournalingMixin,
+    NotificationsMixin,
     TagsMixin,
     EventRulesMixin
 ):

netbox/netbox/models/features.py

@@ -34,6 +34,7 @@ __all__ = (
     'ImageAttachmentsMixin',
     'JobsMixin',
     'JournalingMixin',
+    'NotificationsMixin',
     'SyncedDataMixin',
     'TagsMixin',
     'register_models',
@@ -377,6 +378,25 @@ class BookmarksMixin(models.Model):
         abstract = True
 
 
+class NotificationsMixin(models.Model):
+    """
+    Enables support for user notifications.
+    """
+    notifications = GenericRelation(
+        to='extras.Notification',
+        content_type_field='object_type',
+        object_id_field='object_id'
+    )
+    subscriptions = GenericRelation(
+        to='extras.Subscription',
+        content_type_field='object_type',
+        object_id_field='object_id'
+    )
+
+    class Meta:
+        abstract = True
+
+
 class JobsMixin(models.Model):
     """
     Enables support for job results.
@@ -582,13 +602,14 @@ FEATURES_MAP = {
     'custom_fields': CustomFieldsMixin,
     'custom_links': CustomLinksMixin,
     'custom_validation': CustomValidationMixin,
+    'event_rules': EventRulesMixin,
     'export_templates': ExportTemplatesMixin,
     'image_attachments': ImageAttachmentsMixin,
     'jobs': JobsMixin,
     'journaling': JournalingMixin,
+    'notifications': NotificationsMixin,
     'synced_data': SyncedDataMixin,
     'tags': TagsMixin,
-    'event_rules': EventRulesMixin,
 }
 
 registry['model_features'].update({

netbox/netbox/navigation/menu.py

@@ -355,6 +355,7 @@ OPERATIONS_MENU = Menu(
         MenuGroup(
             label=_('Logging'),
             items=(
+                get_model_item('extras', 'notificationgroup', _('Notification Groups')),
                 get_model_item('extras', 'journalentry', _('Journal Entries'), actions=['import']),
                 get_model_item('core', 'objectchange', _('Change Log'), actions=[]),
             ),

netbox/netbox/settings.py

@@ -84,6 +84,11 @@ DEFAULT_PERMISSIONS = getattr(configuration, 'DEFAULT_PERMISSIONS', {
     'extras.add_bookmark': ({'user': '$user'},),
     'extras.change_bookmark': ({'user': '$user'},),
     'extras.delete_bookmark': ({'user': '$user'},),
+    # Permit users to manage their own subscriptions
+    'extras.view_subscription': ({'user': '$user'},),
+    'extras.add_subscription': ({'user': '$user'},),
+    'extras.change_subscription': ({'user': '$user'},),
+    'extras.delete_subscription': ({'user': '$user'},),
     # Permit users to manage their own API tokens
     'users.view_token': ({'user': '$user'},),
     'users.add_token': ({'user': '$user'},),

netbox/templates/account/base.html

@@ -9,6 +9,12 @@
     <li role="presentation" class="nav-item">
       <a class="nav-link{% if active_tab == 'bookmarks' %} active{% endif %}" href="{% url 'account:bookmarks' %}">{% trans "Bookmarks" %}</a>
     </li>
+    <li role="presentation" class="nav-item">
+      <a class="nav-link{% if active_tab == 'notifications' %} active{% endif %}" href="{% url 'account:notifications' %}">{% trans "Notifications" %}</a>
+    </li>
+    <li role="presentation" class="nav-item">
+      <a class="nav-link{% if active_tab == 'subscriptions' %} active{% endif %}" href="{% url 'account:subscriptions' %}">{% trans "Subscriptions" %}</a>
+    </li>
     <li role="presentation" class="nav-item">
       <a class="nav-link{% if active_tab == 'preferences' %} active{% endif %}" href="{% url 'account:preferences' %}">{% trans "Preferences" %}</a>
     </li>

netbox/templates/account/notifications.html

@@ -0,0 +1,32 @@
+{% extends 'account/base.html' %}
+{% load buttons %}
+{% load helpers %}
+{% load render_table from django_tables2 %}
+{% load i18n %}
+
+{% block title %}{% trans "Notifications" %}{% endblock %}
+
+{% block content %}
+  <form method="post" class="form form-horizontal">
+    {% csrf_token %}
+    <input type="hidden" name="return_url" value="{% url 'account:notifications' %}" />
+
+    {# Table #}
+    <div class="row">
+      <div class="col col-md-12">
+        <div class="card">
+          <div class="htmx-container table-responsive" id="object_list">
+            {% include 'htmx/table.html' %}
+          </div>
+        </div>
+      </div>
+    </div>
+
+    {# Form buttons #}
+    <div class="btn-list d-print-none mt-2">
+      {% if 'bulk_delete' in actions %}
+        {% bulk_delete_button model query_params=request.GET %}
+      {% endif %}
+    </div>
+  </form>
+{% endblock %}

netbox/templates/account/subscriptions.html

@@ -0,0 +1,32 @@
+{% extends 'account/base.html' %}
+{% load buttons %}
+{% load helpers %}
+{% load render_table from django_tables2 %}
+{% load i18n %}
+
+{% block title %}{% trans "Subscriptions" %}{% endblock %}
+
+{% block content %}
+  <form method="post" class="form form-horizontal">
+    {% csrf_token %}
+    <input type="hidden" name="return_url" value="{% url 'account:subscriptions' %}" />
+
+    {# Table #}
+    <div class="row">
+      <div class="col col-md-12">
+        <div class="card">
+          <div class="htmx-container table-responsive" id="object_list">
+            {% include 'htmx/table.html' %}
+          </div>
+        </div>
+      </div>
+    </div>
+
+    {# Form buttons #}
+    <div class="btn-list d-print-none mt-2">
+      {% if 'bulk_delete' in actions %}
+        {% bulk_delete_button model query_params=request.GET %}
+      {% endif %}
+    </div>
+  </form>
+{% endblock %}

netbox/templates/generic/object.html

@@ -77,6 +77,9 @@ Context:
       {% if perms.extras.add_bookmark and object.bookmarks %}
         {% bookmark_button object %}
       {% endif %}
+      {% if perms.extras.add_subscription %}
+        {% subscribe_button object %}
+      {% endif %}
       {% if request.user|can_add:object %}
         {% clone_button object %}
       {% endif %}

netbox/templates/htmx/notifications.html

@@ -0,0 +1,24 @@
+{% load i18n %}
+<div class="list-group list-group-flush list-group-hoverable" style="min-width: 300px">
+  {% for notification in notifications %}
+    <div class="list-group-item p-2">
+      <div class="row align-items-center">
+        <div class="col text-truncate">
+          <a href="{{ notification.get_absolute_url }}" class="text-body d-block">{{ notification.object }}</a>
+          <div class="d-block text-secondary fs-5">{{ notification.get_event_display }} {{ notification.created|timesince }} {% trans "ago" %}</div>
+        </div>
+        <div class="col-auto">
+          <a href="#" hx-get="{% url 'extras:notification_read' pk=notification.pk %}" hx-target="closest .notifications" class="list-group-item-actions text-secondary" title="{% trans "Mark read" %}">
+            <i class="mdi mdi-close"></i>
+          </a>
+        </div>
+      </div>
+    </div>
+  {% empty %}
+    <div class="dropdown-item text-muted">
+      {% trans "No unread notifications" %}
+    </div>
+  {% endfor %}
+</div>
+<hr class="dropdown-divider" />
+<a href="{% url 'account:notifications' %}" class="dropdown-item">{% trans "All notifications" %}</a>

netbox/templates/inc/user_menu.html

@@ -2,6 +2,21 @@
 {% load navigation %}
 
 {% if request.user.is_authenticated %}
+  {# Notifications #}
+  {% with notifications=request.user.notifications.unread.exists %}
+    <div class="nav-item dropdown">
+      <a href="#" class="nav-link" data-bs-toggle="dropdown" hx-get="{% url 'extras:notifications' %}" hx-target="next .notifications" aria-label="Notifications">
+          {% if notifications %}
+            <span class="text-primary"><i class="mdi mdi-bell-badge"></i></span>
+          {% else %}
+            <i class="mdi mdi-bell"></i>
+          {% endif %}
+      </a>
+      <div class="dropdown-menu dropdown-menu-end dropdown-menu-arrow notifications"></div>
+    </div>
+  {% endwith %}
+
+  {# User menu #}
   <div class="nav-item dropdown">
     <a href="#" class="nav-link d-flex lh-1 text-reset p-0" data-bs-toggle="dropdown" aria-label="Open user menu">
       <div class="d-xl-block ps-2">
@@ -29,6 +44,9 @@
       <a href="{% url 'account:bookmarks' %}" class="dropdown-item">
         <i class="mdi mdi-bookmark"></i> {% trans "Bookmarks" %}
       </a>
+      <a href="{% url 'account:subscriptions' %}" class="dropdown-item">
+        <i class="mdi mdi-bell"></i> {% trans "Subscriptions" %}
+      </a>
       <a href="{% url 'account:preferences' %}" class="dropdown-item">
         <i class="mdi mdi-wrench"></i> {% trans "Preferences" %}
       </a>

netbox/utilities/templates/buttons/bookmark.html

@@ -10,7 +10,7 @@
     </button>
   {% else %}
     <button type="submit" class="btn btn-cyan">
-      <i class="mdi mdi-bookmark-check"></i> {% trans "Bookmark" %}
+      <i class="mdi mdi-bookmark-plus"></i> {% trans "Bookmark" %}
     </button>
   {% endif %}
 </form>

netbox/utilities/templates/buttons/subscribe.html

@@ -0,0 +1,16 @@
+{% load i18n %}
+<form action="{{ form_url }}?return_url={{ return_url }}" method="post">
+  {% csrf_token %}
+  {% for field, value in form_data.items %}
+    <input type="hidden" name="{{ field }}" value="{{ value }}" />
+  {% endfor %}
+  {% if subscription %}
+    <button type="submit" class="btn btn-cyan">
+      <i class="mdi mdi-bell-minus"></i> {% trans "Unsubscribe" %}
+    </button>
+  {% else %}
+    <button type="submit" class="btn btn-cyan">
+      <i class="mdi mdi-bell-plus"></i> {% trans "Subscribe" %}
+    </button>
+  {% endif %}
+</form>

netbox/utilities/templatetags/buttons.py

@@ -3,7 +3,7 @@ from django.contrib.contenttypes.models import ContentType
 from django.urls import NoReverseMatch, reverse
 
 from core.models import ObjectType
-from extras.models import Bookmark, ExportTemplate
+from extras.models import Bookmark, ExportTemplate, Subscription
 from utilities.querydict import prepare_cloned_fields
 from utilities.views import get_viewname
 
@@ -17,6 +17,7 @@ __all__ = (
     'edit_button',
     'export_button',
     'import_button',
+    'subscribe_button',
     'sync_button',
 )
 
@@ -94,6 +95,37 @@ def delete_button(instance):
     }
 
 
+@register.inclusion_tag('buttons/subscribe.html', takes_context=True)
+def subscribe_button(context, instance):
+    # Check if this user has already subscribed to the object
+    content_type = ContentType.objects.get_for_model(instance)
+    subscription = Subscription.objects.filter(
+        object_type=content_type,
+        object_id=instance.pk,
+        user=context['request'].user
+    ).first()
+
+    # Compile form URL & data
+    if subscription:
+        form_url = reverse('extras:subscription_delete', kwargs={'pk': subscription.pk})
+        form_data = {
+            'confirm': 'true',
+        }
+    else:
+        form_url = reverse('extras:subscription_add')
+        form_data = {
+            'object_type': content_type.pk,
+            'object_id': instance.pk,
+        }
+
+    return {
+        'subscription': subscription,
+        'form_url': form_url,
+        'form_data': form_data,
+        'return_url': instance.get_absolute_url(),
+    }
+
+
 @register.inclusion_tag('buttons/sync.html')
 def sync_button(instance):
     viewname = get_viewname(instance, 'sync')