Merge remote-tracking branch 'origin/develop' into global-status-expiration
[akkoma] / lib / pleroma / web / activity_pub / mrf / activity_expiration_policy.ex
1 # Pleroma: A lightweight social networking server
2 # Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
3 # SPDX-License-Identifier: AGPL-3.0-only
4
5 defmodule Pleroma.Web.ActivityPub.MRF.ActivityExpirationPolicy do
6 @moduledoc "Adds expiration to all local Create activities"
7 @behaviour Pleroma.Web.ActivityPub.MRF
8
9 @impl true
10 def filter(activity) do
11 activity =
12 if activity["type"] == "Create" && local?(activity) do
13 maybe_add_expiration(activity)
14 else
15 activity
16 end
17
18 {:ok, activity}
19 end
20
21 @impl true
22 def describe, do: {:ok, %{}}
23
24 defp local?(%{"id" => id}) do
25 String.starts_with?(id, Pleroma.Web.Endpoint.url())
26 end
27
28 defp maybe_add_expiration(activity) do
29 days = Pleroma.Config.get([:mrf_activity_expiration, :days], 365)
30 expires_at = NaiveDateTime.utc_now() |> Timex.shift(days: days)
31
32 with %{"expires_at" => existing_expires_at} <- activity,
33 :lt <- NaiveDateTime.compare(existing_expires_at, expires_at) do
34 activity
35 else
36 _ -> Map.put(activity, "expires_at", expires_at)
37 end
38 end
39 end