117 lines
3.2 KiB
Elixir
117 lines
3.2 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Web.ActivityPub.MRF.HashtagPolicy do
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require Pleroma.Constants
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alias Pleroma.Config
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alias Pleroma.Object
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@moduledoc """
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Reject, TWKN-remove or Set-Sensitive messsages with specific hashtags (without the leading #)
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Note: This MRF Policy is always enabled, if you want to disable it you have to set empty lists.
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"""
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@behaviour Pleroma.Web.ActivityPub.MRF
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defp check_reject(message, hashtags) do
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if Enum.any?(Config.get([:mrf_hashtag, :reject]), fn match -> match in hashtags end) do
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{:reject, "[HashtagPolicy] Matches with rejected keyword"}
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else
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{:ok, message}
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end
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end
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defp check_ftl_removal(%{"to" => to} = message, hashtags) do
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if Pleroma.Constants.as_public() in to and
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Enum.any?(Config.get([:mrf_hashtag, :federated_timeline_removal]), fn match ->
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match in hashtags
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end) do
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to = List.delete(to, Pleroma.Constants.as_public())
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cc = [Pleroma.Constants.as_public() | message["cc"] || []]
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message =
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message
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|> Map.put("to", to)
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|> Map.put("cc", cc)
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|> Kernel.put_in(["object", "to"], to)
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|> Kernel.put_in(["object", "cc"], cc)
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{:ok, message}
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else
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{:ok, message}
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end
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end
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defp check_ftl_removal(message, _hashtags), do: {:ok, message}
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defp check_sensitive(message, hashtags) do
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if Enum.any?(Config.get([:mrf_hashtag, :sensitive]), fn match -> match in hashtags end) do
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{:ok, Kernel.put_in(message, ["object", "sensitive"], true)}
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else
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{:ok, message}
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end
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end
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@impl true
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def filter(%{"type" => "Create", "object" => object} = message) do
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hashtags = Object.hashtags(%Object{data: object})
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if hashtags != [] do
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with {:ok, message} <- check_reject(message, hashtags),
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{:ok, message} <- check_ftl_removal(message, hashtags),
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{:ok, message} <- check_sensitive(message, hashtags) do
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{:ok, message}
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end
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else
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{:ok, message}
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end
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end
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@impl true
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def filter(message), do: {:ok, message}
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@impl true
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def describe do
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mrf_hashtag =
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Config.get(:mrf_hashtag)
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|> Enum.into(%{})
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{:ok, %{mrf_hashtag: mrf_hashtag}}
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end
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@impl true
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def config_description do
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%{
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key: :mrf_hashtag,
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related_policy: "Pleroma.Web.ActivityPub.MRF.HashtagPolicy",
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label: "MRF Hashtag",
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description: @moduledoc,
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children: [
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%{
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key: :reject,
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type: {:list, :string},
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description: "A list of hashtags which result in message being rejected.",
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suggestions: ["foo"]
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},
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%{
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key: :federated_timeline_removal,
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type: {:list, :string},
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description:
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"A list of hashtags which result in message being removed from federated timelines (a.k.a unlisted).",
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suggestions: ["foo"]
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},
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%{
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key: :sensitive,
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type: {:list, :string},
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description:
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"A list of hashtags which result in message being set as sensitive (a.k.a NSFW/R-18)",
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suggestions: ["nsfw", "r18"]
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}
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]
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}
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end
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end
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