class CurrencyInput < SimpleForm::Inputs::Base
  include ActionView::Helpers::NumberHelper

  def input
    input_field = @builder.text_field(attribute_name, input_html_options)
  end

  def input_html_options
    merge_formatted_value(super)
  end

  private

  def merge_formatted_value(hash)
    if object.errors[attribute_name].empty?
      hash[:value] ||= number_to_currency(object.send(attribute_name))
    end
    hash
  end
end