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ex_cldr_calendars

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Localized month- and week-based calendars and calendar functions based upon CLDR data.

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ex_cldr_calendars lib cldr calendar fiscal_years.ex
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lib/cldr/calendar/fiscal_years.ex 

defmodule Cldr.Calendar.FiscalYear do

  @fiscal_year_data "./priv/fiscal_years_by_territory.csv"



  [_headings | rows] =

    @fiscal_year_data

    |> File.read!()

    |> String.split("\r\n")



  rows =

    Enum.map(rows, fn row ->

      String.split(row, ~r/(,\"|\",)/)

      |> Enum.flat_map(fn r ->

        if String.contains?(r, "\"") do

          ["dont_care"]

        else

          String.split(r, ",")

        end

      end)

    end)



  @fiscal_year_by_territory rows

                            |> Enum.map(fn

                              [_, "", _, _, _month, _day, _min_days, _] ->

                                nil



                              [

                                _,

                                territory,

                                _,

                                "Cldr.Calendar.Gregorian" = calendar,

                                month,

                                _day,

                                _min_days,

                                _

                              ] ->

                                {:ok, territory} = Cldr.validate_territory(territory)

                                calendar = Module.concat([calendar])

                                month = String.to_integer(month)

                                {territory, [calendar: calendar, month: month]}



                              _other ->

                                nil

                            end)

                            |> Enum.reject(&is_nil/1)

                            |> Map.new()



  @known_fiscal_calendars Map.keys(@fiscal_year_by_territory)



  def known_fiscal_years do

    @fiscal_year_by_territory

  end



  def known_fiscal_calendars do

    @known_fiscal_calendars

  end



  def calendar_for(territory) do

    with {:ok, territory} <- Cldr.validate_territory(territory),

         {:ok, territory} <- known_fiscal_calendar(territory) do

      get_or_create_calendar_for(territory, Map.get(known_fiscal_years(), territory))

    end

  end



  defp known_fiscal_calendar(territory) do

    if territory in @known_fiscal_calendars do

      {:ok, territory}

    else

      {:error,

       {Cldr.UnknownCalendarError, "Fiscal calendar is unknown for #{inspect(territory)}"}}

    end

  end



  defp get_or_create_calendar_for(territory, config) do

    module = Module.concat(Cldr.Calendar.FiscalYear, territory)

    Cldr.Calendar.new(module, :month, config)

  end

end