module Playbook::JustifySelf

def justify_self_props
  selected_props = justify_self_options.keys.select { |sk| try(sk) }
  return nil unless selected_props.present?
  selected_props.map do |k|
    justify_self_value = send(k)
    if justify_self_value.is_a?(Hash)
      justify_self_value.map do |media_size, self_value|
        "justify_self_#{media_size}_#{self_value}" if justify_self_values.include? self_value
      end
    else
      "justify_self_#{justify_self_value}" if justify_self_values.include? justify_self_value
    end
  end.compact.join(" ")
end