class RubyXL::WorkbookRoot

def self.default
  obj = self.new
  obj.document_properties    = RubyXL::DocumentPropertiesFile.new
  obj.core_properties        = RubyXL::CorePropertiesFile.new
  obj.relationship_container = RubyXL::RootRelationships.new
  obj.content_types          = RubyXL::ContentTypes.new
  obj
end

def self.parse_file(xl_file_path, opts)
  raise 'Not .xlsx or .xlsm excel file' unless opts[:skip_filename_check] || 
                                          %w{.xlsx .xlsm}.include?(File.extname(xl_file_path))
  ::Zip::File.open(xl_file_path) { |zip_file|
    root = self.new
    root.filepath = xl_file_path
    root.content_types = RubyXL::ContentTypes.parse_file(zip_file)
    root.load_relationships(zip_file)
    root.workbook.root = root
    root
  }
end

def attach_relationship(rid, rf)
  case rf
  when RubyXL::ThumbnailFile          then self.thumbnail = rf
  when RubyXL::CorePropertiesFile     then self.core_properties = rf
  when RubyXL::DocumentPropertiesFile then self.document_properties = rf
  when RubyXL::CustomPropertiesFile   then self.custom_properties = rf
  when RubyXL::Workbook               then self.workbook = rf
  else store_relationship(rf, :unknown)
  end
end

def related_objects
  [ content_types, thumbnail, core_properties, document_properties, workbook ]
end

def relationship_file_class
  RubyXL::RootRelationships
end