no_empty_policy.ex (1730B)
- # Pleroma: A lightweight social networking server
- # Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
- # SPDX-License-Identifier: AGPL-3.0-only
- defmodule Pleroma.Web.ActivityPub.MRF.NoEmptyPolicy do
- @moduledoc "Filter local activities which have no content"
- @behaviour Pleroma.Web.ActivityPub.MRF.Policy
- alias Pleroma.Web.Endpoint
- @impl true
- def filter(%{"actor" => actor} = object) do
- with true <- local?(actor),
- true <- eligible_type?(object),
- true <- note?(object),
- false <- has_attachment?(object),
- true <- only_mentions?(object) do
- {:reject, "[NoEmptyPolicy]"}
- else
- _ ->
- {:ok, object}
- end
- end
- def filter(object), do: {:ok, object}
- defp local?(actor) do
- if actor |> String.starts_with?("#{Endpoint.url()}") do
- true
- else
- false
- end
- end
- defp has_attachment?(%{
- "object" => %{"type" => "Note", "attachment" => attachments}
- })
- when length(attachments) > 0,
- do: true
- defp has_attachment?(_), do: false
- defp only_mentions?(%{"object" => %{"type" => "Note", "source" => source}}) do
- source =
- case source do
- %{"content" => text} -> text
- _ -> source
- end
- non_mentions =
- source |> String.split() |> Enum.filter(&(not String.starts_with?(&1, "@"))) |> length
- if non_mentions > 0 do
- false
- else
- true
- end
- end
- defp only_mentions?(_), do: false
- defp note?(%{"object" => %{"type" => "Note"}}), do: true
- defp note?(_), do: false
- defp eligible_type?(%{"type" => type}) when type in ["Create", "Update"], do: true
- defp eligible_type?(_), do: false
- @impl true
- def describe, do: {:ok, %{}}
- end