class EacRubyUtils::Fs::ClearableDirectory

def clear
  validate_clearable
  directory? ? clear_directory : clear_no_directory
  mkpath
  ::FileUtils.touch(clearable_note_file.to_path)
  self
end

def clear_directory
  children.each do |child|
    if child.directory?
      child.rmtree
    elsif child.file?
      child.unlink
    end
  end
end

def clear_no_directory
  ::FileUtils.rm_rf(to_path)
end

def clearable?
  clearable_negate_message ? true : false
end

def clearable_negate_message
  return if !exist? || empty?
  return "Path \"#{self}\" exists, is not empty and is not a directory" unless directory?
  return if clearable_note_file.exist?
  "Directory \"#{self}\" is not empty and does not have a #{CLEARABLE_BASENAME} file"
end

def clearable_note_file
  join(CLEARABLE_BASENAME)
end

def validate_clearable
  message = clearable_negate_message
  raise message if message
end