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tz_extra

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Time zone-related utilities

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tz_extra lib update_periodically.ex
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lib/update_periodically.ex 

defmodule TzExtra.UpdatePeriodically do

  use GenServer



  require Logger



  alias Tz.HTTP

  alias Tz.Updater, as: TzUpdater

  alias TzExtra.Compiler



  defp maybe_recompile_tz() do

    TzUpdater.maybe_recompile()

  end



  defp maybe_recompile_tz_extra() do

    if Tz.iana_version() != TzExtra.iana_version() do

      Logger.info("TzExtra is recompiling the time zone data...")

      Code.compiler_options(ignore_module_conflict: true)

      Compiler.compile()

      Code.compiler_options(ignore_module_conflict: false)

      Logger.info("TzExtra compilation done")

    end

  end



  def start_link(opts) do

    HTTP.get_http_client!()



    GenServer.start_link(__MODULE__, opts)

  end



  def init(opts) do

    maybe_recompile_tz()

    maybe_recompile_tz_extra()

    schedule_work(opts[:interval_in_days])

    {:ok, %{opts: opts}}

  end



  def handle_info(:work, %{opts: opts}) do

    maybe_recompile_tz()

    maybe_recompile_tz_extra()

    schedule_work(opts[:interval_in_days])

    {:noreply, %{opts: opts}}

  end



  defp schedule_work(interval_in_days) do

    interval_in_days = interval_in_days || 1

    Process.send_after(self(), :work, interval_in_days * 24 * 60 * 60 * 1000)

  end

end