podemos-info / iban_bic

require "iban_bic/version"

require "iban_bic/railtie" if defined?(Rails)

require "iban_bic/configuration"

require "iban_bic/iban_parts"

require "iban_bic/models/bic"

module IbanBic

  def configuration

    configuration.instance_eval(&Proc.new)

  end

  def calculate_check(iban)

    98 - "#{iban[4..-1]}#{iban[0..3]}".each_char.map do |char|

      case char

      when "0".."9" then char

      when "A".."Z" then (char.ord - 55).to_s

      else raise("Invalid IBAN")

      end

    end .join.to_i % 97

  end

  def calculate_bic(iban)

    country = iban[0..1]

    parts = IbanParser.partser[country].match(iban)

    return nil unless parts&.fetch(:bank, nil)

    if ActiveRecord::Base.connection.table_exists? "bics"

      Bic.find_by(country: country, bank_code: parts[:bank]).pluck(:bic)

    else

      configuration.static_bics.dig(country, parts[:bank])

    end

  end

  module_function :configuration, :configure, :calculate_check, :calculate_bic

end

require "iban_bic/defaults"