Commit b0adea30 authored by kaniini's avatar kaniini
Browse files

Merge branch 're-mrf' into 'develop'

Add a MRF Policy for appending re: to identical subjects in replies.

See merge request !499
parents 776179c2 d27e3f26
Pipeline #5031 passed with stages
in 2 minutes and 25 seconds
......@@ -39,6 +39,7 @@ Note: `strip_exif` has been replaced by `Pleroma.Upload.Filter.Mogrify`.
* `Pleroma.Web.ActivityPub.MRF.DropPolicy`: Drops all activities. It generally doesn’t makes sense to use in production
* `Pleroma.Web.ActivityPub.MRF.SimplePolicy`: Restrict the visibility of activities from certains instances (See ``:mrf_simple`` section)
* `Pleroma.Web.ActivityPub.MRF.RejectNonPublic`: Drops posts with non-public visibility settings (See ``:mrf_rejectnonpublic`` section)
* `Pleroma.Web.ActivityPub.MRF.EnsureRePrepended`: Rewrites posts to ensure that replies to posts with subjects do not have an identical subject and instead begin with re:.
* `public`: Makes the client API in authentificated mode-only except for user-profiles. Useful for disabling the Local Timeline and The Whole Known Network.
* `quarantined_instances`: List of ActivityPub instances where private(DMs, followers-only) activities will not be send.
* `managed_config`: Whenether the config for pleroma-fe is configured in this config or in ``static/config.json``
defmodule Pleroma.Web.ActivityPub.MRF.EnsureRePrepended do
alias Pleroma.Object
@behaviour Pleroma.Web.ActivityPub.MRF
@reply_prefix Regex.compile!("^re:[[:space:]]*", [:caseless])
def filter_by_summary(
%{"summary" => parent_summary} = parent,
%{"summary" => child_summary} = child
when not is_nil(child_summary) and byte_size(child_summary) > 0 and
not is_nil(parent_summary) and byte_size(parent_summary) > 0 do
if (child_summary == parent_summary and not Regex.match?(@reply_prefix, child_summary)) or
(Regex.match?(@reply_prefix, parent_summary) &&
Regex.replace(@reply_prefix, parent_summary, "") == child_summary) do
Map.put(child, "summary", "re: " <> child_summary)
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"])
child =
do: filter_by_summary(, child),
else: child
object = Map.put(object, "object", child)
{:ok, object}
def filter(object), do: {:ok, object}
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