tests MRF filters

lib/pleroma/web/activity_pub/mrf/ensure_re_prepended.ex

@@ -9,8 +9,9 @@ defmodule Pleroma.Web.ActivityPub.MRF.EnsureRePrepended do
   @behaviour Pleroma.Web.ActivityPub.MRF
 
   @reply_prefix Regex.compile!("^re:[[:space:]]*", [:caseless])
+
   def filter_by_summary(
-        %{"summary" => parent_summary} = _parent,
+        %{data: %{"summary" => parent_summary}} = _in_reply_to,
         %{"summary" => child_summary} = child
       )
       when not is_nil(child_summary) and byte_size(child_summary) > 0 and
@@ -24,17 +25,13 @@ defmodule Pleroma.Web.ActivityPub.MRF.EnsureRePrepended do
     end
   end
 
-  def filter_by_summary(_parent, child), do: child
-
-  def filter(%{"type" => activity_type} = object) when activity_type == "Create" do
-    child = object["object"]
-    in_reply_to = Object.normalize(child["inReplyTo"])
+  def filter_by_summary(_in_reply_to, child), do: child
 
+  def filter(%{"type" => "Create", "object" => child_object} = object) do
     child =
-      if(in_reply_to,
-        do: filter_by_summary(in_reply_to.data, child),
-        else: child
-      )
+      child_object["inReplyTo"]
+      |> Object.normalize(child_object["inReplyTo"])
+      |> filter_by_summary(child_object)
 
     object = Map.put(object, "object", child)
 

lib/pleroma/web/activity_pub/mrf/no_placeholder_text_policy.ex

@@ -10,19 +10,11 @@ defmodule Pleroma.Web.ActivityPub.MRF.NoPlaceholderTextPolicy do
   def filter(
         %{
           "type" => "Create",
-          "object" => %{"content" => content, "attachment" => _attachment} = child_object
+          "object" => %{"content" => content, "attachment" => _} = _child_object
         } = object
       )
       when content in [".", "<p>.</p>"] do
-    child_object =
-      child_object
-      |> Map.put("content", "")
-
-    object =
-      object
-      |> Map.put("object", child_object)
-
-    {:ok, object}
+    {:ok, put_in(object, ["object", "content"], "")}
   end
 
   @impl true

lib/pleroma/web/activity_pub/mrf/normalize_markup.ex

@@ -8,18 +8,14 @@ defmodule Pleroma.Web.ActivityPub.MRF.NormalizeMarkup do
 
   @behaviour Pleroma.Web.ActivityPub.MRF
 
-  def filter(%{"type" => activity_type} = object) when activity_type == "Create" do
+  def filter(%{"type" => "Create", "object" => child_object} = object) do
     scrub_policy = Pleroma.Config.get([:mrf_normalize_markup, :scrub_policy])
 
-    child = object["object"]
-
     content =
-      child["content"]
+      child_object["content"]
       |> HTML.filter_tags(scrub_policy)
 
-    child = Map.put(child, "content", content)
-
-    object = Map.put(object, "object", child)
+    object = put_in(object, ["object", "content"], content)
 
     {:ok, object}
   end

lib/pleroma/web/activity_pub/mrf/reject_non_public.ex

@@ -3,46 +3,42 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.ActivityPub.MRF.RejectNonPublic do
-  alias Pleroma.User
   @moduledoc "Rejects non-public (followers-only, direct) activities"
+
+  alias Pleroma.Config
+  alias Pleroma.User
+
   @behaviour Pleroma.Web.ActivityPub.MRF
 
+  @public "https://www.w3.org/ns/activitystreams#Public"
+
   @impl true
   def filter(%{"type" => "Create"} = object) do
     user = User.get_cached_by_ap_id(object["actor"])
-    public = "https://www.w3.org/ns/activitystreams#Public"
 
     # Determine visibility
     visibility =
       cond do
-        public in object["to"] -> "public"
-        public in object["cc"] -> "unlisted"
+        @public in object["to"] -> "public"
+        @public in object["cc"] -> "unlisted"
         user.follower_address in object["to"] -> "followers"
         true -> "direct"
       end
 
-    policy = Pleroma.Config.get(:mrf_rejectnonpublic)
+    policy = Config.get(:mrf_rejectnonpublic)
 
-    case visibility do
-      "public" ->
+    cond do
+      visibility in ["public", "unlisted"] ->
         {:ok, object}
 
-      "unlisted" ->
+      visibility == "followers" and Keyword.get(policy, :allow_followersonly) ->
         {:ok, object}
 
-      "followers" ->
-        with true <- Keyword.get(policy, :allow_followersonly) do
-          {:ok, object}
-        else
-          _e -> {:reject, nil}
-        end
+      visibility == "direct" and Keyword.get(policy, :allow_direct) ->
+        {:ok, object}
 
-      "direct" ->
-        with true <- Keyword.get(policy, :allow_direct) do
-          {:ok, object}
-        else
-          _e -> {:reject, nil}
-        end
+      true ->
+        {:reject, nil}
     end
   end
 

lib/pleroma/web/activity_pub/mrf/tag_policy.ex

@@ -19,12 +19,17 @@ defmodule Pleroma.Web.ActivityPub.MRF.TagPolicy do
      - `mrf_tag:disable-any-subscription`: Reject any follow requests
   """
 
+  @public "https://www.w3.org/ns/activitystreams#Public"
+
   defp get_tags(%User{tags: tags}) when is_list(tags), do: tags
   defp get_tags(_), do: []
 
   defp process_tag(
          "mrf_tag:media-force-nsfw",
-         %{"type" => "Create", "object" => %{"attachment" => child_attachment} = object} = message
+         %{
+           "type" => "Create",
+           "object" => %{"attachment" => child_attachment} = object
+         } = message
        )
        when length(child_attachment) > 0 do
     tags = (object["tag"] || []) ++ ["nsfw"]
@@ -41,7 +46,10 @@ defmodule Pleroma.Web.ActivityPub.MRF.TagPolicy do
 
   defp process_tag(
          "mrf_tag:media-strip",
-         %{"type" => "Create", "object" => %{"attachment" => child_attachment} = object} = message
+         %{
+           "type" => "Create",
+           "object" => %{"attachment" => child_attachment} = object
+         } = message
        )
        when length(child_attachment) > 0 do
     object = Map.delete(object, "attachment")
@@ -52,19 +60,22 @@ defmodule Pleroma.Web.ActivityPub.MRF.TagPolicy do
 
   defp process_tag(
          "mrf_tag:force-unlisted",
-         %{"type" => "Create", "to" => to, "cc" => cc, "actor" => actor} = message
+         %{
+           "type" => "Create",
+           "to" => to,
+           "cc" => cc,
+           "actor" => actor,
+           "object" => object
+         } = message
        ) do
     user = User.get_cached_by_ap_id(actor)
 
-    if Enum.member?(to, "https://www.w3.org/ns/activitystreams#Public") do
-      to =
-        List.delete(to, "https://www.w3.org/ns/activitystreams#Public") ++ [user.follower_address]
-
-      cc =
-        List.delete(cc, user.follower_address) ++ ["https://www.w3.org/ns/activitystreams#Public"]
+    if Enum.member?(to, @public) do
+      to = List.delete(to, @public) ++ [user.follower_address]
+      cc = List.delete(cc, user.follower_address) ++ [@public]
 
       object =
-        message["object"]
+        object
         |> Map.put("to", to)
         |> Map.put("cc", cc)
 
@@ -82,19 +93,22 @@ defmodule Pleroma.Web.ActivityPub.MRF.TagPolicy do
 
   defp process_tag(
          "mrf_tag:sandbox",
-         %{"type" => "Create", "to" => to, "cc" => cc, "actor" => actor} = message
+         %{
+           "type" => "Create",
+           "to" => to,
+           "cc" => cc,
+           "actor" => actor,
+           "object" => object
+         } = message
        ) do
     user = User.get_cached_by_ap_id(actor)
 
-    if Enum.member?(to, "https://www.w3.org/ns/activitystreams#Public") or
-         Enum.member?(cc, "https://www.w3.org/ns/activitystreams#Public") do
-      to =
-        List.delete(to, "https://www.w3.org/ns/activitystreams#Public") ++ [user.follower_address]
-
-      cc = List.delete(cc, "https://www.w3.org/ns/activitystreams#Public")
+    if Enum.member?(to, @public) or Enum.member?(cc, @public) do
+      to = List.delete(to, @public) ++ [user.follower_address]
+      cc = List.delete(cc, @public)
 
       object =
-        message["object"]
+        object
         |> Map.put("to", to)
         |> Map.put("cc", cc)
 
@@ -123,7 +137,8 @@ defmodule Pleroma.Web.ActivityPub.MRF.TagPolicy do
     end
   end
 
-  defp process_tag("mrf_tag:disable-any-subscription", %{"type" => "Follow"}), do: {:reject, nil}
+  defp process_tag("mrf_tag:disable-any-subscription", %{"type" => "Follow"}),
+    do: {:reject, nil}
 
   defp process_tag(_, message), do: {:ok, message}
 

lib/pleroma/web/activity_pub/mrf/user_allowlist_policy.ex

@@ -21,7 +21,12 @@ defmodule Pleroma.Web.ActivityPub.MRF.UserAllowListPolicy do
   @impl true
   def filter(%{"actor" => actor} = object) do
     actor_info = URI.parse(actor)
-    allow_list = Config.get([:mrf_user_allowlist, String.to_atom(actor_info.host)], [])
+
+    allow_list =
+      Config.get(
+        [:mrf_user_allowlist, String.to_atom(actor_info.host)],
+        []
+      )
 
     filter_by_list(object, allow_list)
   end