Closes #10543: Introduce get_plugin_config() utility function

docs/plugins/development/index.md

@@ -117,11 +117,11 @@ NetBox looks for the `config` variable within a plugin's `__init__.py` to load i
 All required settings must be configured by the user. If a configuration parameter is listed in both `required_settings` and `default_settings`, the default setting will be ignored.
 
 !!! tip "Accessing Config Parameters"
-    Plugin configuration parameters can be accessed in `settings.PLUGINS_CONFIG`, mapped by plugin name. For example:
+    Plugin configuration parameters can be accessed using the `get_plugin_config()` function. For example:
     
     ```python
-    from django.conf import settings
-    settings.PLUGINS_CONFIG['myplugin']['verbose_name']
+    from extras.plugins import get_plugin_config
+    get_plugin_config('my_plugin', 'verbose_name')
     ```
 
 #### Important Notes About `django_apps`

netbox/extras/plugins/__init__.py

@@ -1,6 +1,7 @@
 import collections
 
 from django.apps import AppConfig
+from django.conf import settings
 from django.core.exceptions import ImproperlyConfigured
 from django.utils.module_loading import import_string
 from packaging import version
@@ -140,3 +141,23 @@ class PluginConfig(AppConfig):
         for setting, value in cls.default_settings.items():
             if setting not in user_config:
                 user_config[setting] = value
+
+
+#
+# Utilities
+#
+
+def get_plugin_config(plugin_name, parameter, default=None):
+    """
+    Return the value of the specified plugin configuration parameter.
+
+    Args:
+        plugin_name: The name of the plugin
+        parameter: The name of the configuration parameter
+        default: The value to return if the parameter is not defined (default: None)
+    """
+    try:
+        plugin_config = settings.PLUGINS_CONFIG[plugin_name]
+        return plugin_config.get(parameter, default)
+    except KeyError:
+        raise ImproperlyConfigured(f"Plugin {plugin_name} is not registered.")

netbox/extras/tests/test_plugins.py

@@ -5,7 +5,7 @@ from django.core.exceptions import ImproperlyConfigured
 from django.test import Client, TestCase, override_settings
 from django.urls import reverse
 
-from extras.plugins import PluginMenu
+from extras.plugins import PluginMenu, get_plugin_config
 from extras.tests.dummy_plugin import config as dummy_config
 from netbox.graphql.schema import Query
 from netbox.registry import registry
@@ -173,3 +173,13 @@ class PluginTest(TestCase):
 
         self.assertIn(DummyQuery, registry['plugins']['graphql_schemas'])
         self.assertTrue(issubclass(Query, DummyQuery))
+
+    @override_settings(PLUGINS_CONFIG={'extras.tests.dummy_plugin': {'foo': 123}})
+    def test_get_plugin_config(self):
+        """
+        Validate that get_plugin_config() returns config parameters correctly.
+        """
+        plugin = 'extras.tests.dummy_plugin'
+        self.assertEqual(get_plugin_config(plugin, 'foo'), 123)
+        self.assertEqual(get_plugin_config(plugin, 'bar'), None)
+        self.assertEqual(get_plugin_config(plugin, 'bar', default=456), 456)