Convert page listing view to a class-based view

wagtail/admin/urls/__init__.py

@@ -28,8 +28,12 @@ urlpatterns = [
     path("api/", include(api_urls)),
     path("failwhale/", home.error_test, name="wagtailadmin_error_test"),
     # TODO: Move into wagtailadmin_pages namespace
-    path("pages/", listing.index, name="wagtailadmin_explore_root"),
-    path("pages/<int:parent_page_id>/", listing.index, name="wagtailadmin_explore"),
+    path("pages/", listing.IndexView.as_view(), name="wagtailadmin_explore_root"),
+    path(
+        "pages/<int:parent_page_id>/",
+        listing.IndexView.as_view(),
+        name="wagtailadmin_explore",
+    ),
     # bulk actions
     path(
         "bulk/<str:app_label>/<str:model_name>/<str:action>/",

wagtail/admin/views/pages/listing.py

@@ -5,6 +5,8 @@ from django.http import Http404
 from django.shortcuts import get_object_or_404, redirect
 from django.template.response import TemplateResponse
 from django.urls import reverse
+from django.utils.decorators import method_decorator
+from django.views.generic import View
 
 from wagtail import hooks
 from wagtail.admin.auth import user_has_any_page_permission, user_passes_test
@@ -12,8 +14,9 @@ from wagtail.admin.ui.side_panels import PageSidePanels
 from wagtail.permission_policies.pages import Page, PagePermissionPolicy
 
 
-@user_passes_test(user_has_any_page_permission)
-def index(request, parent_page_id=None):
+class IndexView(View):
+    @method_decorator(user_passes_test(user_has_any_page_permission))
+    def get(self, request, parent_page_id=None):
         if parent_page_id:
             parent_page = get_object_or_404(Page, id=parent_page_id)
         else:
@@ -26,7 +29,9 @@ def index(request, parent_page_id=None):
 
         # If this page isn't a descendant of the user's explorable root page,
         # then redirect to that explorable root page instead.
-    if not (parent_page.pk == root_page.pk or parent_page.is_descendant_of(root_page)):
+        if not (
+            parent_page.pk == root_page.pk or parent_page.is_descendant_of(root_page)
+        ):
             return redirect("wagtailadmin_explore", root_page.pk)
 
         parent_page = parent_page.specific