git.squeep.com Git - akkoma/blob - lib/pleroma/web/activity_pub/mrf/followbot_policy.ex

   1 defmodule Pleroma.Web.ActivityPub.MRF.FollowbotPolicy do
   2   @behaviour Pleroma.Web.ActivityPub.MRF
   3   alias Pleroma.Activity
   4   alias Pleroma.Config
   5   alias Pleroma.User
   6   alias Pleroma.Web.CommonAPI
   7
   8   require Logger
   9
  10   @impl true
  11   def filter(message) do
  12     with follower_nickname <- Config.get([:mrf_follow_bot, :follower_nickname]),
  13          %User{actor_type: "Service"} = follower <-
  14            User.get_cached_by_nickname(follower_nickname),
  15          %{"type" => "Create", "object" => %{"type" => "Note"}} <- message do
  16       try_follow(follower, message)
  17     else
  18       nil ->
  19         Logger.warn(
  20           "#{__MODULE__} skipped because of missing `:mrf_follow_bot, :follower_nickname` configuration, the :follower_nickname
  21             account does not exist, or the account is not correctly configured as a bot."
  22         )
  23
  24         {:ok, message}
  25
  26       _ ->
  27         {:ok, message}
  28     end
  29   end
  30
  31   defp try_follow(follower, message) do
  32     Task.start(fn ->
  33       to = Map.get(message, "to", [])
  34       cc = Map.get(message, "cc", [])
  35       actor = [message["actor"]]
  36
  37       Enum.concat([to, cc, actor])
  38       |> List.flatten()
  39       |> Enum.uniq()
  40       |> User.get_all_by_ap_id()
  41       |> Enum.each(fn user ->
  42         since_thirty_days_ago = NaiveDateTime.utc_now() |> NaiveDateTime.add(-(86_400 * 30))
  43
  44         with false <- user.local,
  45              false <- User.following?(follower, user),
  46              false <- User.locked?(user),
  47              false <- (user.bio || "") |> String.downcase() |> String.contains?("nobot"),
  48              false <-
  49                Activity.follow_requests_outstanding_since?(follower, user, since_thirty_days_ago) do
  50           Logger.info(
  51             "#{__MODULE__}: Follow request from #{follower.nickname} to #{user.nickname}"
  52           )
  53
  54           CommonAPI.follow(follower, user)
  55         end
  56       end)
  57     end)
  58
  59     {:ok, message}
  60   end
  61
  62   @impl true
  63   def describe do
  64     {:ok, %{}}
  65   end
  66 end