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tz_extra

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Time zone-related utilities

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tz_extra lib tz_extra.ex
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lib/tz_extra.ex 

defmodule TzExtra do

  require TzExtra.FileParser.CountryParser

  require TzExtra.FileParser.ZoneParser

  import TzExtra.Helper



  alias TzExtra.FileParser.CountryParser

  alias TzExtra.FileParser.ZoneParser



  tz_data_dir = Path.join(:code.priv_dir(:tz), Tz.version())



  countries = CountryParser.parse(Path.join(tz_data_dir, "iso3166.tab"))

  time_zones = ZoneParser.parse(Path.join(tz_data_dir, "zone1970.tab"), countries)



  time_zones =

    Enum.map(time_zones, fn time_zone ->

      {:ok, periods} = Tz.periods(time_zone.name)



      utc_offset = find_latest_utc_offset_for_periods(periods)

      dst_offset = utc_offset + find_latest_std_offset_for_periods(periods)



      time_zone

      |> Map.put(:utc_offset, utc_offset)

      |> Map.put(:dst_offset, dst_offset)

      |> Map.put(:pretty_utc_offset, offset_to_string(utc_offset))

      |> Map.put(:pretty_dst_offset, offset_to_string(dst_offset))

    end)



  def countries() do

    unquote(Macro.escape(countries))

  end



  def time_zones() do

    unquote(Macro.escape(time_zones))

  end

end