Module: MsoMetadata

Defined in:
lib/mso_metadata.rb,
lib/mso_metadata/version.rb

Defined Under Namespace

Classes: Error

Constant Summary collapse

VERSION = 
"0.1.0"

Class Method Summary collapse

Class Method Details

.read(office_xml_file) ⇒ Object 



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# File 'lib/mso_metadata.rb', line 10

def self.read office_xml_file
  core_metadata = {}
  custom_metadata = {}
  Zip::File.open(office_xml_file) do |zip_file|
    # Read the core metadata (docProps/core.xml)
    core_xml = zip_file.find_entry('docProps/core.xml')&.get_input_stream&.read
    if core_xml
      core_doc = Nokogiri::XML(core_xml)
      core_metadata[:title] = core_doc.at_xpath('//dc:title')&.text
      core_metadata[:subject] = core_doc.at_xpath('//dc:subject')&.text
      core_metadata[:creator] = core_doc.at_xpath('//dc:creator')&.text
      core_metadata[:keywords] = core_doc.at_xpath('//dc:keywords')&.text
      core_metadata[:description] = core_doc.at_xpath('//dc:description')&.text
      core_metadata[:lastModifiedBy] = core_doc.at_xpath('//cp:lastModifiedBy')&.text
      core_metadata[:revision] = core_doc.at_xpath('//cp:revision')&.text
      core_metadata[:category] = core_doc.at_xpath('//cp:category')&.text
      core_metadata[:created] = core_doc.at_xpath('//dcterms:created')&.text
      core_metadata[:modified] = core_doc.at_xpath('//dcterms:modified')&.text
    end

    # Read the app metadata (docProps/app.xml)
    app_xml = zip_file.find_entry('docProps/app.xml')&.get_input_stream&.read
    if app_xml
      app_doc = Nokogiri::XML(app_xml)
      core_metadata[:application] = app_doc.at_xpath('//*:Application')&.text
      core_metadata[:company] = app_doc.at_xpath('//*:Company')&.text
    end

    # Read the custom metadata (docProps/custom.xml)
    custom_xml = zip_file.find_entry('docProps/custom.xml')&.get_input_stream&.read
    if custom_xml
      custom_doc = Nokogiri::XML(custom_xml)
      custom_doc.xpath('//*:property').each do |property|
        value = property.text
        type_name = property.first_element_child.name
        # we convert bool and int, others are strings
        if type_name =~ /bool/
          value = value.downcase == 'true'
        elsif type_name =~ /i\d/
          value = value.to_i
        end
        custom_metadata[property.attr('name')] = value
      end
    end
  end
  { core: core_metadata, custom: custom_metadata }
end