43 lines
1.2 KiB
Elixir
43 lines
1.2 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2020 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
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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?(%{"id" => id}) do
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String.starts_with?(id, 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 = NaiveDateTime.utc_now() |> Timex.shift(days: days)
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with %{"expires_at" => existing_expires_at} <- activity,
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:lt <- NaiveDateTime.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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end
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