nodeinfo: allow opting out of MRF transparency

config/config.exs

@@ -79,7 +79,8 @@
     "text/plain",
     "text/html",
     "text/markdown"
-  ]
+  ],
+  mrf_transparency: true
 
 config :pleroma, :markup,
   # XXX - unfortunately, inline images must be enabled by default right now, because

lib/pleroma/web/nodeinfo/nodeinfo_controller.ex

@@ -4,6 +4,7 @@ defmodule Pleroma.Web.Nodeinfo.NodeinfoController do
   alias Pleroma.Stats
   alias Pleroma.Web
   alias Pleroma.{User, Repo}
+  alias Pleroma.Web.ActivityPub.MRF
 
   def schemas(conn, _params) do
     response = %{
@@ -31,15 +32,9 @@ def nodeinfo(conn, %{"version" => "2.0"}) do
       Application.get_env(:pleroma, :mrf_simple)
       |> Enum.into(%{})
 
-    mrf_policies = Keyword.get(instance, :rewrite_policy)
-
     mrf_policies =
-      if(is_list(mrf_policies)) do
-        mrf_policies
-        |> Enum.map(fn policy -> to_string(policy) |> String.split(".") |> List.last() end)
-      else
-        [to_string(mrf_policies) |> String.split(".") |> List.last()]
-      end
+      MRF.get_policies()
+      |> Enum.map(fn policy -> to_string(policy) |> String.split(".") |> List.last() end)
 
     quarantined = Keyword.get(instance, :quarantined_instances)
 
@@ -55,6 +50,19 @@ def nodeinfo(conn, %{"version" => "2.0"}) do
       |> Repo.all()
       |> Enum.map(fn u -> u.ap_id end)
 
+    mrf_transparency = Keyword.get(instance, :mrf_transparency)
+
+    federation_response =
+      if mrf_transparency do
+        %{
+          mrf_policies: mrf_policies,
+          mrf_simple: mrf_simple,
+          quarantined_instances: quarantined
+        }
+      else
+        %{}
+      end
+
     response = %{
       version: "2.0",
       software: %{
@@ -88,11 +96,7 @@ def nodeinfo(conn, %{"version" => "2.0"}) do
         staffAccounts: staff_accounts,
         chat: Keyword.get(chat, :enabled),
         gopher: Keyword.get(gopher, :enabled),
-        federation: %{
-          mrf_policies: mrf_policies,
-          mrf_simple: mrf_simple,
-          quarantined_instances: quarantined
-        },
+        federation: federation_response,
         postFormats: Keyword.get(instance, :allowed_post_formats)
       }
     }