feat: add personalized navigation and tenant filtering

netbox_utilities/runtime.py

@@ -0,0 +1,33 @@
+from django.core.cache import cache
+from django.db import OperationalError, ProgrammingError
+from netbox.plugins import get_plugin_config
+
+from .models import UtilitiesSettings
+
+SETTINGS_CACHE_KEY = "netbox_utilities.runtime_settings.v1"
+
+
+def navigation_customization_enabled():
+    return bool(get_plugin_config("netbox_utilities", "navigation_customization_enabled"))
+
+
+def tenant_filter_enabled():
+    if not get_plugin_config("netbox_utilities", "tenant_filter_enabled"):
+        return False
+
+    enabled = cache.get(SETTINGS_CACHE_KEY)
+    if enabled is None:
+        try:
+            enabled = (
+                UtilitiesSettings.objects.filter(singleton_id=1).values_list("tenant_filter_enabled", flat=True).first()
+            )
+        except (OperationalError, ProgrammingError):
+            # The middleware can be imported before the first plugin migration.
+            enabled = True
+        enabled = True if enabled is None else enabled
+        cache.set(SETTINGS_CACHE_KEY, enabled, timeout=30)
+    return bool(enabled)
+
+
+def clear_runtime_settings_cache():
+    cache.delete(SETTINGS_CACHE_KEY)