pleroma

software_policy.ex (1425B)

# Pleroma: A lightweight social networking server
# Copyright © 2017-2023 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.ActivityPub.MRF.SoftwarePolicy do
  @moduledoc "Filter activities depending on the software used"
  @behaviour Pleroma.Web.ActivityPub.MRF.Policy
  alias Pleroma.Instances.Instance
  defp check_wildebeest(%URI{host: nil}, object), do: {:ok, object}
  defp check_wildebeest(%URI{} = uri, object) do
    instance_info = Instance.get_or_update_metadata(uri)
    if instance_info && Map.get(instance_info, :software_name) == "wildebeest" do
      {:reject, "[SoftwarePolicy] Cloudflare Wildebeest"}
    else
      {:ok, object}
    end
  end
  @impl true
  def filter(%{"id" => actor} = object) do
    uri = URI.parse(actor)
    with {:ok, object} <- check_wildebeest(uri, object) do
      {:ok, object}
    else
      {:reject, nil} -> {:reject, "[SoftwarePolicy]"}
      {:reject, _} = e -> e
      _ -> {:reject, "[SoftwarePolicy]"}
    end
  end
  def filter(object) when is_binary(object) do
    uri = URI.parse(object)
    with {:ok, object} <- check_wildebeest(uri, object) do
      {:ok, object}
    else
      {:reject, nil} -> {:reject, "[SoftwarePolicy]"}
      {:reject, _} = e -> e
      _ -> {:reject, "[SoftwarePolicy]"}
    end
  end
  def filter(object), do: {:ok, object}
  @impl true
  def describe, do: {:ok, %{}}
end