add mrf

pleroma/custom-modules/mrf_yeehaw_policy.ex

@@ -0,0 +1,50 @@
+defmodule Pleroma.Web.ActivityPub.MRF.YeehawPolicy do
+  @behaviour Pleroma.Web.ActivityPub.MRF.Policy
+
+  require Logger
+
+  @impl true
+  def filter(
+        %{
+          "type" => "Create",
+          "object" => %{"type" => "Note", "content" => _content} = object,
+          "actor" => actor
+        } = activity
+      ) do
+    actor_info = URI.parse(actor)
+    local_instance = Pleroma.Config.get([Pleroma.Web.Endpoint, :url, :host])
+    try do
+      if actor_info.host == local_instance do
+        {:ok,
+         Map.put(
+           activity,
+           "object",
+           object |> update_in(["content"], fn x -> x <> "\n\n- Yeehaw" end)
+         )}
+      else
+        {:ok, activity}
+      end
+    rescue
+      err ->
+        Logger.warning(inspect(err))
+        {:ok, activity}
+    end
+  end
+
+  def filter(activity), do: {:ok, activity}
+
+  @impl true
+  def describe do
+    {:ok, %{}}
+  end
+
+  @impl true
+  def config_description do
+    %{
+      key: :mrf_yeehawpolicy,
+      related_policy: "Pleroma.Web.ActivityPub.MRF.YeeHawPolicy",
+      label: "YeeHaw at everyone",
+      description: "YeeHaw at everyone on the local instance"
+    }
+  end
+end