70 lines
2.4 KiB
Elixir
70 lines
2.4 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.VocabularyPolicy do
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@moduledoc "Filter messages which belong to certain activity vocabularies"
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@behaviour Pleroma.Web.ActivityPub.MRF.Policy
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@impl true
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def filter(%{"type" => "Undo", "object" => child_message} = message) do
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with {:ok, _} <- filter(child_message) do
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{:ok, message}
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else
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{:reject, _} = e -> e
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end
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end
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def filter(%{"type" => message_type} = message) do
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with accepted_vocabulary <- Pleroma.Config.get([:mrf_vocabulary, :accept]),
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rejected_vocabulary <- Pleroma.Config.get([:mrf_vocabulary, :reject]),
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{_, true} <-
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{:accepted,
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Enum.empty?(accepted_vocabulary) || Enum.member?(accepted_vocabulary, message_type)},
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{_, false} <-
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{:rejected,
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length(rejected_vocabulary) > 0 && Enum.member?(rejected_vocabulary, message_type)},
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{:ok, _} <- filter(message["object"]) do
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{:ok, message}
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else
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{:reject, _} = e -> e
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{:accepted, _} -> {:reject, "[VocabularyPolicy] #{message_type} not in accept list"}
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{:rejected, _} -> {:reject, "[VocabularyPolicy] #{message_type} in reject list"}
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_ -> {:reject, "[VocabularyPolicy]"}
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end
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end
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def filter(message), do: {:ok, message}
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@impl true
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def describe,
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do: {:ok, %{mrf_vocabulary: Pleroma.Config.get(:mrf_vocabulary) |> Enum.into(%{})}}
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@impl true
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def config_description do
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%{
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key: :mrf_vocabulary,
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related_policy: "Pleroma.Web.ActivityPub.MRF.VocabularyPolicy",
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label: "MRF Vocabulary",
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description: "Filter messages which belong to certain activity vocabularies",
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children: [
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%{
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key: :accept,
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type: {:list, :string},
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description:
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"A list of ActivityStreams terms to accept. If empty, all supported messages are accepted.",
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suggestions: ["Create", "Follow", "Mention", "Announce", "Like"]
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},
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%{
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key: :reject,
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type: {:list, :string},
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description:
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"A list of ActivityStreams terms to reject. If empty, no messages are rejected.",
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suggestions: ["Create", "Follow", "Mention", "Announce", "Like"]
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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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