require 'indented_io'

module MetaDb
  class DbObject
    def dump
      puts self.class.to_s
      dump_attrs
    end
    
    def dump_attrs(*attrs)
      attrs = Array(attrs)
      attrs = self.class.attrs if attrs.empty?
      indent {
        for attr in Array(attrs)
          value = self.send(attr)
          case value
            when Array
              puts "#{attr}:"
              indent { value.each { |v| v.dump } }
            when DbObject
              puts "#{attr}: #{value.name} (#{value.class})"
          else
            puts "#{attr}: #{self.send(attr).inspect}"
          end
        end
      }
    end
  end
end