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localize

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Localization (parsing, formatting) of numbers, dates/time/calendar, units of measure, messages and lists. Includes localized collation.

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localize lib localize application.ex
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lib/localize/application.ex 

defmodule Localize.Application do

  @moduledoc false



  use Application



  require Logger



  @impl true

  def start(_type \\ :normal, _args \\ []) do

    ensure_locale_cache_table()



    children = [

      Localize.DataLoader,

      Localize.Locale.Loader,

      Localize.Locale.CacheSweeper,

      Localize.FormatCache,

      Localize.Collation.Table

    ]



    options = [strategy: :one_for_one, name: Localize.Supervisor]



    case Supervisor.start_link(children, options) do

      {:ok, pid} ->

        resolve_supported_locales()

        {:ok, pid}



      error ->

        error

    end

  end



  defp ensure_locale_cache_table do

    if :ets.whereis(:localize_locale_cache) == :undefined do

      :ets.new(:localize_locale_cache, [

        :set,

        :public,

        :named_table,

        read_concurrency: true

      ])

    end

  end



  # ── Supported locales ───────────────────────────────────────────



  defp resolve_supported_locales do

    maybe_warn_deprecated_preload()



    case Application.get_env(:localize, :supported_locales) do

      nil ->

        :ok



      locales when is_list(locales) ->

        expanded = Localize.Locale.expand_locale_list(locales, :supported_locales)

        :persistent_term.put({:localize, :supported_locales}, expanded)

    end

  end



  defp maybe_warn_deprecated_preload do

    case Application.get_env(:localize, :preload_locales) do

      nil ->

        :ok



      _configured ->

        Logger.warning(

          "The :preload_locales configuration key is deprecated and ignored. " <>

            "Use :supported_locales to declare your locale set, and " <>

            "`mix localize.download_locales` to pre-populate the cache " <>

            "at build time. Locale data is loaded lazily into " <>

            ":persistent_term on first access.",

          domain: [:localize]

        )

    end

  end

end