forked from AkkomaGang/akkoma
c4439c630f
grep -rl '# Copyright © .* Pleroma' * | xargs sed -i 's;Copyright © .* Pleroma .*;Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>;'
127 lines
3.7 KiB
Elixir
127 lines
3.7 KiB
Elixir
# Pleroma: A lightweight social networking server
|
|
# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
|
|
# SPDX-License-Identifier: AGPL-3.0-only
|
|
|
|
defmodule Pleroma.Web.ActivityPub.MRF.HellthreadPolicy do
|
|
alias Pleroma.User
|
|
|
|
require Pleroma.Constants
|
|
|
|
@moduledoc "Block messages with too much mentions (configurable)"
|
|
|
|
@behaviour Pleroma.Web.ActivityPub.MRF
|
|
|
|
defp delist_message(message, threshold) when threshold > 0 do
|
|
follower_collection = User.get_cached_by_ap_id(message["actor"]).follower_address
|
|
to = message["to"] || []
|
|
cc = message["cc"] || []
|
|
|
|
follower_collection? = Enum.member?(to ++ cc, follower_collection)
|
|
|
|
message =
|
|
case get_recipient_count(message) do
|
|
{:public, recipients}
|
|
when follower_collection? and recipients > threshold ->
|
|
message
|
|
|> Map.put("to", [follower_collection])
|
|
|> Map.put("cc", [Pleroma.Constants.as_public()])
|
|
|
|
{:public, recipients} when recipients > threshold ->
|
|
message
|
|
|> Map.put("to", [])
|
|
|> Map.put("cc", [Pleroma.Constants.as_public()])
|
|
|
|
_ ->
|
|
message
|
|
end
|
|
|
|
{:ok, message}
|
|
end
|
|
|
|
defp delist_message(message, _threshold), do: {:ok, message}
|
|
|
|
defp reject_message(message, threshold) when threshold > 0 do
|
|
with {_, recipients} <- get_recipient_count(message) do
|
|
if recipients > threshold do
|
|
{:reject, "[HellthreadPolicy] #{recipients} recipients is over the limit of #{threshold}"}
|
|
else
|
|
{:ok, message}
|
|
end
|
|
end
|
|
end
|
|
|
|
defp reject_message(message, _threshold), do: {:ok, message}
|
|
|
|
defp get_recipient_count(message) do
|
|
recipients = (message["to"] || []) ++ (message["cc"] || [])
|
|
follower_collection = User.get_cached_by_ap_id(message["actor"]).follower_address
|
|
|
|
if Enum.member?(recipients, Pleroma.Constants.as_public()) do
|
|
recipients =
|
|
recipients
|
|
|> List.delete(Pleroma.Constants.as_public())
|
|
|> List.delete(follower_collection)
|
|
|
|
{:public, length(recipients)}
|
|
else
|
|
recipients =
|
|
recipients
|
|
|> List.delete(follower_collection)
|
|
|
|
{:not_public, length(recipients)}
|
|
end
|
|
end
|
|
|
|
@impl true
|
|
def filter(%{"type" => "Create", "object" => %{"type" => object_type}} = message)
|
|
when object_type in ~w{Note Article} do
|
|
reject_threshold =
|
|
Pleroma.Config.get(
|
|
[:mrf_hellthread, :reject_threshold],
|
|
Pleroma.Config.get([:mrf_hellthread, :threshold])
|
|
)
|
|
|
|
delist_threshold = Pleroma.Config.get([:mrf_hellthread, :delist_threshold])
|
|
|
|
with {:ok, message} <- reject_message(message, reject_threshold),
|
|
{:ok, message} <- delist_message(message, delist_threshold) do
|
|
{:ok, message}
|
|
else
|
|
e -> e
|
|
end
|
|
end
|
|
|
|
@impl true
|
|
def filter(message), do: {:ok, message}
|
|
|
|
@impl true
|
|
def describe,
|
|
do: {:ok, %{mrf_hellthread: Pleroma.Config.get(:mrf_hellthread) |> Enum.into(%{})}}
|
|
|
|
@impl true
|
|
def config_description do
|
|
%{
|
|
key: :mrf_hellthread,
|
|
related_policy: "Pleroma.Web.ActivityPub.MRF.HellthreadPolicy",
|
|
label: "MRF Hellthread",
|
|
description: "Block messages with excessive user mentions",
|
|
children: [
|
|
%{
|
|
key: :delist_threshold,
|
|
type: :integer,
|
|
description:
|
|
"Number of mentioned users after which the message gets removed from timelines and" <>
|
|
"disables notifications. Set to 0 to disable.",
|
|
suggestions: [10]
|
|
},
|
|
%{
|
|
key: :reject_threshold,
|
|
type: :integer,
|
|
description:
|
|
"Number of mentioned users after which the messaged gets rejected. Set to 0 to disable.",
|
|
suggestions: [20]
|
|
}
|
|
]
|
|
}
|
|
end
|
|
end
|