nodeinfo: use MRF.describe() instead of hardcoded MRF transparency stuff

lib/pleroma/web/nodeinfo/nodeinfo_controller.ex

@@ -34,64 +34,18 @@ defmodule Pleroma.Web.Nodeinfo.NodeinfoController do
   def raw_nodeinfo do
     stats = Stats.get_stats()
 
-    exclusions = Config.get([:instance, :mrf_transparency_exclusions])
-
-    mrf_simple =
-      Config.get(:mrf_simple)
-      |> Enum.map(fn {k, v} -> {k, Enum.reject(v, fn v -> v in exclusions end)} end)
-      |> Enum.into(%{})
-
-    # This horror is needed to convert regex sigils to strings
-    mrf_keyword =
-      Config.get(:mrf_keyword, [])
-      |> Enum.map(fn {key, value} ->
-        {key,
-         Enum.map(value, fn
-           {pattern, replacement} ->
-             %{
-               "pattern" =>
-                 if not is_binary(pattern) do
-                   inspect(pattern)
-                 else
-                   pattern
-                 end,
-               "replacement" => replacement
-             }
-
-           pattern ->
-             if not is_binary(pattern) do
-               inspect(pattern)
-             else
-               pattern
-             end
-         end)}
-      end)
-      |> Enum.into(%{})
-
-    mrf_policies =
-      MRF.get_policies()
-      |> Enum.map(fn policy -> to_string(policy) |> String.split(".") |> List.last() end)
-
     quarantined = Config.get([:instance, :quarantined_instances], [])
 
     staff_accounts =
       User.all_superusers()
       |> Enum.map(fn u -> u.ap_id end)
 
-    mrf_user_allowlist =
-      Config.get([:mrf_user_allowlist], [])
-      |> Enum.into(%{}, fn {k, v} -> {k, length(v)} end)
-
     federation_response =
       if Config.get([:instance, :mrf_transparency]) do
-        %{
+        {:ok, data} = MRF.describe()
-          mrf_policies: mrf_policies,
+
-          mrf_simple: mrf_simple,
+        data
-          mrf_keyword: mrf_keyword,
+        |> Map.merge(%{quarantined_instances: quarantined})
-          mrf_user_allowlist: mrf_user_allowlist,
-          quarantined_instances: quarantined,
-          exclusions: length(exclusions) > 0
-        }
       else
         %{}
       end