61 lines
1.7 KiB
Elixir
61 lines
1.7 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2023 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Web.ActivityPub.MRF.ActivityExpirationPolicy do
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@moduledoc "Adds expiration to all local Create activities"
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@behaviour Pleroma.Web.ActivityPub.MRF.Policy
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@impl true
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def filter(activity) do
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activity =
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if note?(activity) and local?(activity) do
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maybe_add_expiration(activity)
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else
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activity
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end
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{:ok, activity}
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end
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@impl true
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def describe, do: {:ok, %{}}
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defp local?(%{"actor" => actor}) do
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String.starts_with?(actor, Pleroma.Web.Endpoint.url())
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end
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defp note?(activity) do
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match?(%{"type" => "Create", "object" => %{"type" => "Note"}}, activity)
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end
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defp maybe_add_expiration(activity) do
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days = Pleroma.Config.get([:mrf_activity_expiration, :days], 365)
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expires_at = DateTime.utc_now() |> Timex.shift(days: days)
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with %{"expires_at" => existing_expires_at} <- activity,
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:lt <- DateTime.compare(existing_expires_at, expires_at) do
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activity
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else
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_ -> Map.put(activity, "expires_at", expires_at)
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end
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end
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@impl true
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def config_description do
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%{
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key: :mrf_activity_expiration,
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related_policy: "Pleroma.Web.ActivityPub.MRF.ActivityExpirationPolicy",
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label: "MRF Activity Expiration Policy",
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description: "Adds automatic expiration to all local activities",
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children: [
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%{
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key: :days,
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type: :integer,
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description: "Default global expiration time for all local activities (in days)",
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suggestions: [90, 365]
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}
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]
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}
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end
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end
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