user_tracking_plug.ex
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user_tracking_plug.ex
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	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Web.Plugs.UserTrackingPlug do
	alias Pleroma.User

	import Plug.Conn, only: [assign: 3]

	@update_interval :timer.hours(24)

	def init(opts), do: opts

	def call(%{assigns: %{user: %User{id: id} = user}} = conn, _) when not is_nil(id) do
	with true <- needs_update?(user),
	{:ok, user} <- User.update_last_active_at(user) do
	assign(conn, :user, user)
	else
	_ -> conn
	end
	end

	def call(conn, _), do: conn

	defp needs_update?(%User{last_active_at: nil}), do: true

	defp needs_update?(%User{last_active_at: last_active_at}) do
	NaiveDateTime.diff(NaiveDateTime.utc_now(), last_active_at, :millisecond) >= @update_interval
	end
	end