git.squeep.com Git - akkoma/blob - lib/pleroma/web/activity_pub/mrf/ensure_re_prepended.ex

   1 defmodule Pleroma.Web.ActivityPub.MRF.EnsureRePrepended do
   2   alias Pleroma.Object
   3
   4   @behaviour Pleroma.Web.ActivityPub.MRF
   5
   6   @reply_prefix Regex.compile!("^re:[[:space:]]*", [:caseless])
   7   def filter_by_summary(
   8         %{"summary" => parent_summary} = _parent,
   9         %{"summary" => child_summary} = child
  10       )
  11       when not is_nil(child_summary) and byte_size(child_summary) > 0 and
  12              not is_nil(parent_summary) and byte_size(parent_summary) > 0 do
  13     if (child_summary == parent_summary and not Regex.match?(@reply_prefix, child_summary)) or
  14          (Regex.match?(@reply_prefix, parent_summary) &&
  15             Regex.replace(@reply_prefix, parent_summary, "") == child_summary) do
  16       Map.put(child, "summary", "re: " <> child_summary)
  17     else
  18       child
  19     end
  20   end
  21
  22   def filter_by_summary(_parent, child), do: child
  23
  24   def filter(%{"type" => activity_type} = object) when activity_type == "Create" do
  25     child = object["object"]
  26     in_reply_to = Object.normalize(child["inReplyTo"])
  27
  28     child =
  29       if(in_reply_to,
  30         do: filter_by_summary(in_reply_to.data, child),
  31         else: child
  32       )
  33
  34     object = Map.put(object, "object", child)
  35
  36     {:ok, object}
  37   end
  38
  39   def filter(object), do: {:ok, object}
  40 end