git.squeep.com Git - akkoma/blob - lib/pleroma/workers/purge_expired_activity.ex

   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Workers.PurgeExpiredActivity do
   6   @moduledoc """
   7   Worker which purges expired activity.
   8   """
   9
  10   use Oban.Worker, queue: :activity_expiration, max_attempts: 1, unique: [period: :infinity]
  11
  12   import Ecto.Query
  13
  14   alias Pleroma.Activity
  15
  16   @spec enqueue(map()) ::
  17           {:ok, Oban.Job.t()}
  18           | {:error, :expired_activities_disabled}
  19           | {:error, :expiration_too_close}
  20   def enqueue(args) do
  21     with true <- enabled?() do
  22       {scheduled_at, args} = Map.pop(args, :expires_at)
  23
  24       args
  25       |> new(scheduled_at: scheduled_at)
  26       |> Oban.insert()
  27     end
  28   end
  29
  30   @impl Oban.Worker
  31   def timeout(_job) do
  32     Pleroma.Config.get([:workers, :timeout, :activity_expiration]) || :timer.minutes(1)
  33   end
  34
  35   @impl true
  36   def perform(%Oban.Job{args: %{"activity_id" => id}}) do
  37     with %Activity{} = activity <- find_activity(id),
  38          %Pleroma.User{} = user <- find_user(activity.object.data["actor"]) do
  39       Pleroma.Web.CommonAPI.delete(activity.id, user)
  40     end
  41   end
  42
  43   defp enabled? do
  44     with false <- Pleroma.Config.get([__MODULE__, :enabled], false) do
  45       {:error, :expired_activities_disabled}
  46     end
  47   end
  48
  49   defp find_activity(id) do
  50     with nil <- Activity.get_by_id_with_object(id) do
  51       {:error, :activity_not_found}
  52     end
  53   end
  54
  55   defp find_user(ap_id) do
  56     with nil <- Pleroma.User.get_by_ap_id(ap_id) do
  57       {:error, :user_not_found}
  58     end
  59   end
  60
  61   def get_expiration(id) do
  62     from(j in Oban.Job,
  63       where: j.state == "scheduled",
  64       where: j.queue == "activity_expiration",
  65       where: fragment("?->>'activity_id' = ?", j.args, ^id)
  66     )
  67     |> Pleroma.Repo.one()
  68   end
  69
  70   @spec expires_late_enough?(DateTime.t()) :: boolean()
  71   def expires_late_enough?(scheduled_at) do
  72     now = DateTime.utc_now()
  73     diff = DateTime.diff(scheduled_at, now, :millisecond)
  74     min_lifetime = Pleroma.Config.get([__MODULE__, :min_lifetime], 600)
  75     diff > :timer.seconds(min_lifetime)
  76   end
  77 end