Closes #9416: Dashboard widgets (#11823)

* Replace masonry with gridstack

* Initial work on dashboard widgets

* Implement function to save dashboard layout

* Define a default dashboard

* Clean up widgets

* Implement widget configuration views & forms

* Permit merging dict value with existing dict in user config

* Add widget deletion view

* Enable HTMX for widget configuration

* Implement view to add dashboard widgets

* ObjectCountsWidget: Identify models by app_label & name

* Add color customization to dashboard widgets

* Introduce Dashboard model to store user dashboard layout & config

* Clean up utility functions

* Remove hard-coded API URL

* Use fixed grid cell height

* Add modal close button

* Clean up dashboard views

* Rebuild JS

netbox/extras/api/serializers.py

@@ -34,6 +34,7 @@ __all__ = (
     'ContentTypeSerializer',
     'CustomFieldSerializer',
     'CustomLinkSerializer',
+    'DashboardSerializer',
     'ExportTemplateSerializer',
     'ImageAttachmentSerializer',
     'JobResultSerializer',
@@ -563,3 +564,13 @@ class ContentTypeSerializer(BaseModelSerializer):
     class Meta:
         model = ContentType
         fields = ['id', 'url', 'display', 'app_label', 'model']
+
+
+#
+# User dashboard
+#
+
+class DashboardSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Dashboard
+        fields = ('layout', 'config')

netbox/extras/api/urls.py

@@ -1,3 +1,5 @@
+from django.urls import include, path
+
 from netbox.api.routers import NetBoxRouter
 from . import views
 
@@ -22,4 +24,7 @@ router.register('job-results', views.JobResultViewSet)
 router.register('content-types', views.ContentTypeViewSet)
 
 app_name = 'extras-api'
-urlpatterns = router.urls
+urlpatterns = [
+    path('dashboard/', views.DashboardView.as_view(), name='dashboard'),
+    path('', include(router.urls)),
+]

netbox/extras/api/views.py

@@ -4,6 +4,7 @@ from django_rq.queues import get_connection
 from rest_framework import status
 from rest_framework.decorators import action
 from rest_framework.exceptions import PermissionDenied
+from rest_framework.generics import RetrieveUpdateDestroyAPIView
 from rest_framework.permissions import IsAuthenticated
 from rest_framework.renderers import JSONRenderer
 from rest_framework.response import Response
@@ -423,3 +424,15 @@ class ContentTypeViewSet(ReadOnlyModelViewSet):
     queryset = ContentType.objects.order_by('app_label', 'model')
     serializer_class = serializers.ContentTypeSerializer
     filterset_class = filtersets.ContentTypeFilterSet
+
+
+#
+# User dashboard
+#
+
+class DashboardView(RetrieveUpdateDestroyAPIView):
+    queryset = Dashboard.objects.all()
+    serializer_class = serializers.DashboardSerializer
+
+    def get_object(self):
+        return Dashboard.objects.filter(user=self.request.user).first()