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akkoma/lib/pleroma/web/activity_pub/mrf/reject_non_public.ex

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# Pleroma: A lightweight social networking server
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# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.ActivityPub.MRF.RejectNonPublic do
@moduledoc "Rejects non-public (followers-only, direct) activities"
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alias Pleroma.Config
alias Pleroma.User
@behaviour Pleroma.Web.ActivityPub.MRF
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@public "https://www.w3.org/ns/activitystreams#Public"
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@impl true
def filter(%{"type" => "Create"} = object) do
user = User.get_cached_by_ap_id(object["actor"])
# Determine visibility
visibility =
cond do
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@public in object["to"] -> "public"
@public in object["cc"] -> "unlisted"
user.follower_address in object["to"] -> "followers"
true -> "direct"
end
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policy = Config.get(:mrf_rejectnonpublic)
cond do
visibility in ["public", "unlisted"] ->
{:ok, object}
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visibility == "followers" and Keyword.get(policy, :allow_followersonly) ->
{:ok, object}
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visibility == "direct" and Keyword.get(policy, :allow_direct) ->
{:ok, object}
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true ->
{:reject, nil}
end
end
@impl true
def filter(object), do: {:ok, object}
end