Support menu items that are callables

netbox/netbox/plugins/navigation.py

@@ -38,9 +38,12 @@ class PluginMenuItem:
     permissions = []
     buttons = []
 
-    def __init__(self, link, link_text, auth_required=False, staff_only=False, permissions=None, buttons=None):
+    def __init__(
+        self, link, link_text, url=None, auth_required=False, staff_only=False, permissions=None, buttons=None
+    ):
         self.link = link
         self.link_text = link_text
+        self.url = url
         self.auth_required = auth_required
         self.staff_only = staff_only
         if permissions is not None:
@@ -61,10 +64,11 @@ class PluginMenuButton:
     color = ButtonColorChoices.DEFAULT
     permissions = []
 
-    def __init__(self, link, title, icon_class, color=None, permissions=None):
+    def __init__(self, link, title, icon_class, url=None, color=None, permissions=None):
         self.link = link
         self.title = title
         self.icon_class = icon_class
+        self.url = url
         if permissions is not None:
             if type(permissions) not in (list, tuple):
                 raise TypeError(_("Permissions must be passed as a tuple or list."))

netbox/netbox/plugins/registration.py

@@ -53,8 +53,11 @@ def register_template_extensions(class_list):
 
 
 def register_menu(menu):
-    if not isinstance(menu, PluginMenu):
+    if not (isinstance(menu, PluginMenu) or callable(menu)):
-        raise TypeError(_("{item} must be an instance of netbox.plugins.PluginMenuItem").format(item=menu))
+        raise TypeError(_(
+            "{item} must be an instance of netbox.plugins.PluginMenu "
+            "or a callable returning such an instance").format(item=menu)
+        )
     registry['plugins']['menus'].append(menu)
 
 
@@ -64,15 +67,17 @@ def register_menu_items(section_name, class_list):
     """
     # Validation
     for menu_link in class_list:
-        if not isinstance(menu_link, PluginMenuItem):
+        if not (isinstance(menu_link, PluginMenuItem) or callable(menu_link)):
-            raise TypeError(_("{menu_link} must be an instance of netbox.plugins.PluginMenuItem").format(
+            raise TypeError(_(
-                menu_link=menu_link
+                "{menu_link} must be an instance of netbox.plugins.PluginMenuItem "
-            ))
+                "or a callable returning such an instance").format(menu_link=menu_link)
+            )
         for button in menu_link.buttons:
-            if not isinstance(button, PluginMenuButton):
+            if not (isinstance(button, PluginMenuButton) or callable(button)):
-                raise TypeError(_("{button} must be an instance of netbox.plugins.PluginMenuButton").format(
+                raise TypeError(_(
-                    button=button
+                    "{button} must be an instance of netbox.plugins.PluginMenuButton "
-                ))
+                    "or a callable returning such an instance").format(button=button)
+                )
 
     registry['plugins']['menu_items'][section_name] = class_list
 

netbox/utilities/templates/navigation/menu.html

@@ -41,11 +41,11 @@
               </div>
               {% for item, buttons in items %}
                 <div class="dropdown-item d-flex justify-content-between ps-3 py-0">
-                  <a href="{% url item.link %}" class="d-inline-flex flex-fill py-1">{{ item.link_text }}</a>
+                  <a href="{% if item.url %}{{ item.url }}{% else %}{% url item.link %}{% endif %}" class="d-inline-flex flex-fill py-1">{{ item.link_text }}</a>
                   {% if buttons %}
                     <div class="btn-group ms-1">
                       {% for button in buttons %}
-                        <a href="{% url button.link %}" class="btn btn-sm btn-{{ button.color|default:"outline" }} lh-2 px-2" title="{{ button.title }}">
+                        <a href="{% if button.url %}{{ button.url }}{% else %}{% url button.link %}"{% endif %} class="btn btn-sm btn-{{ button.color|default:"outline" }} lh-2 px-2" title="{{ button.title }}">
                           <i class="{{ button.icon_class }}"></i>
                         </a>
                       {% endfor %}

netbox/utilities/templatetags/navigation.py

@@ -22,10 +22,14 @@ def nav(context):
 
     # Construct the navigation menu based upon the current user's permissions
     for menu in MENUS:
+        if callable(menu):
+            menu = menu()
         groups = []
         for group in menu.groups:
             items = []
             for item in group.items:
+                if callable(item):
+                    item = item()
                 if getattr(item, 'auth_required', False) and not user.is_authenticated:
                     continue
                 if not user.has_perms(item.permissions):
@@ -33,7 +37,9 @@ def nav(context):
                 if item.staff_only and not user.is_staff:
                     continue
                 buttons = [
-                    button for button in item.buttons if user.has_perms(button.permissions)
+                    button for button in [
+                        button() if callable(button) else button for button in item.buttons
+                    ] if user.has_perms(button.permissions)
                 ]
                 items.append((item, buttons))
             if items: