66 lines
1.9 KiB
Elixir
66 lines
1.9 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2019 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.HellthreadPolicy do
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alias Pleroma.User
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@behaviour Pleroma.Web.ActivityPub.MRF
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defp delist_message(message) do
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follower_collection = User.get_cached_by_ap_id(message["actor"]).follower_address
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message
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|> Map.put("to", [follower_collection])
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|> Map.put("cc", ["https://www.w3.org/ns/activitystreams#Public"])
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end
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defp get_recipient_count(message) do
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recipients = (message["to"] || []) ++ (message["cc"] || [])
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cond do
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Enum.member?(recipients, "https://www.w3.org/ns/activitystreams#Public") &&
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Enum.find(recipients, &String.ends_with?(&1, "/followers")) ->
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length(recipients) - 2
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Enum.member?(recipients, "https://www.w3.org/ns/activitystreams#Public") ||
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Enum.find(recipients, &String.ends_with?(&1, "/followers")) ->
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length(recipients) - 1
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true ->
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length(recipients)
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end
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end
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@impl true
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def filter(%{"type" => "Create"} = message) do
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delist_threshold = Pleroma.Config.get([:mrf_hellthread, :delist_threshold])
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reject_threshold =
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Pleroma.Config.get(
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[:mrf_hellthread, :reject_threshold],
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Pleroma.Config.get([:mrf_hellthread, :threshold])
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)
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recipients = get_recipient_count(message)
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cond do
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recipients > reject_threshold and reject_threshold > 0 ->
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{:reject, nil}
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recipients > delist_threshold and delist_threshold > 0 ->
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if Enum.member?(message["to"], "https://www.w3.org/ns/activitystreams#Public") or
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Enum.member?(message["cc"], "https://www.w3.org/ns/activitystreams#Public") do
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{:ok, delist_message(message)}
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else
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{:ok, message}
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end
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true ->
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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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end
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