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

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defmodule Pleroma.Web.ActivityPub.MRF.FollowbotPolicy do
@behaviour Pleroma.Web.ActivityPub.MRF
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alias Pleroma.Activity
alias Pleroma.Config
alias Pleroma.User
alias Pleroma.Web.CommonAPI
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require Logger
@impl true
def filter(message) do
with follower_nickname <- Config.get([:mrf_follow_bot, :follower_nickname]),
%User{actor_type: "Service"} = follower <-
User.get_cached_by_nickname(follower_nickname),
%{"type" => "Create", "object" => %{"type" => "Note"}} <- message do
try_follow(follower, message)
else
nil ->
Logger.warn(
"#{__MODULE__} skipped because of missing `:mrf_follow_bot, :follower_nickname` configuration, the :follower_nickname
account does not exist, or the account is not correctly configured as a bot."
)
{:ok, message}
_ ->
{:ok, message}
end
end
defp try_follow(follower, message) do
Task.start(fn ->
to = Map.get(message, "to", [])
cc = Map.get(message, "cc", [])
actor = [message["actor"]]
Enum.concat([to, cc, actor])
|> List.flatten()
|> Enum.uniq()
|> User.get_all_by_ap_id()
|> Enum.each(fn user ->
since_thirty_days_ago = NaiveDateTime.utc_now() |> NaiveDateTime.add(-(86_400 * 30))
with false <- user.local,
false <- User.following?(follower, user),
false <- User.locked?(user),
false <- (user.bio || "") |> String.downcase() |> String.contains?("nobot"),
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false <-
Activity.follow_requests_outstanding_since?(follower, user, since_thirty_days_ago) do
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Logger.info(
"#{__MODULE__}: Follow request from #{follower.nickname} to #{user.nickname}"
)
CommonAPI.follow(follower, user)
end
end)
end)
{:ok, message}
end
@impl true
def describe do
{:ok, %{}}
end
end