Merge branch 'reply-visibility-user-guard' into 'develop'

Mastodon API: fix the public timeline returning an error when the `reply_visibility` parameter is set to `self` for an unauthenticated user

See merge request pleroma/pleroma!2999

lib/pleroma/web/activity_pub/activity_pub.ex

@@ -744,7 +744,7 @@ defp restrict_replies(query, %{exclude_replies: true}) do
   end
 
   defp restrict_replies(query, %{
-         reply_filtering_user: user,
+         reply_filtering_user: %User{} = user,
          reply_visibility: "self"
        }) do
     from(
@@ -760,7 +760,7 @@ defp restrict_replies(query, %{
   end
 
   defp restrict_replies(query, %{
-         reply_filtering_user: user,
+         reply_filtering_user: %User{} = user,
          reply_visibility: "following"
        }) do
     from(

test/web/activity_pub/activity_pub_test.exs

@@ -1773,6 +1773,14 @@ test "public timeline with default reply_visibility `self`", %{users: %{u1: user
         |> Enum.map(& &1.id)
 
       assert activities_ids == []
+
+      activities_ids =
+        %{}
+        |> Map.put(:reply_visibility, "self")
+        |> Map.put(:reply_filtering_user, nil)
+        |> ActivityPub.fetch_public_activities()
+
+      assert activities_ids == []
     end
 
     test "home timeline", %{users: %{u1: user}} do