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A CNAB file helper. This library aims to help your bank or cooperative read, decode, display, and perform various operations on a CNAB file. Supported operations: - Read CNAB240 file - Return some data - Get details type

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ex_cnab app cnabex cnab240 services get_file_info.ex
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app/cnabex/cnab240/services/get_file_info.ex 

defmodule ExCnab.Cnab240.Services.GetFileInfo do

  @moduledoc """

  Service to get file infos from filename

  """



  import Helpers.ConvertPosition



  @spec run(String.t()) :: {:ok, Map.t()}

  def run(filename) do

    filename

    |> String.slice(0..3)

    |> String.match?(~r/\d+/)

    |> filename_template(filename)

  end



  defp filename_template(true, filename) do

    {:ok,

     %{

       codigo_convenio: convert_position(filename, 1, 3),

       dia_geracao_arquivo: convert_position(filename, 4, 5),

       codigo_mes_geracao_arquivo: convert_position(filename, 6),

       sequencia_arquivo: convert_position(filename, 7, 8),

       nome_arquivo: filename

     }}

  end



  defp filename_template(false, filename) do

    {:ok,

     %{

       codigo_convenio: convert_position(filename, 1, 4),

       dia_geracao_arquivo: convert_position(filename, 5, 6),

       sequencia_arquivo: convert_position(filename, 7, 8),

       nome_arquivo: filename

     }}

  end

end