Class: Dbtools::Converter::GoogleDrive2RDFConverter

Inherits:
Object
  • Object
show all
Defined in:
lib/dbtools/converter/google_drive2_rdf_converter.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ GoogleDrive2RDFConverter

Returns a new instance of GoogleDrive2RDFConverter.



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# File 'lib/dbtools/converter/google_drive2_rdf_converter.rb', line 7

def initialize
  Spira.repository = RDF::Repository.new
end

Instance Method Details

#drivefile2rdf(google_drive_file) ⇒ String

Converts a google drive file instance to RDF statements

Parameters:

  • google_drive_file (Google::Apis::DriveV3::File) —

    Google drive file that will be converted.

Returns:

  • (String) —

    RDF ntriples in string format.



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# File 'lib/dbtools/converter/google_drive2_rdf_converter.rb', line 16

def drivefile2rdf(google_drive_file)
  file = google_drive_file
  result = []
  Spira.repository ||= RDF::Repository.new

  if file.mime_type == 'application/vnd.google-apps.folder'
    # Google Folder specific attributes
    uri = RDF::URI.new("https://drive.google.com/drive/folders/#{file.id}")
    drive_file = uri.as(Dbtools::Google_Drive::GoogleDriveFolder)
  else
    # Google File specific attributes
    uri = RDF::URI.new(Dbtools::Google_Drive::Google_drive_api.get_url_from_id(file.id))
    drive_file = uri.as(Dbtools::Google_Drive::GoogleDriveFile)
    drive_file.file_extension = file.file_extension
    drive_file.web_content_link = file.web_content_link
  end
  # Shared attributes
  drive_file.name = file.name
  drive_file.identifier = file.id
  drive_file.created_time = file.created_time
  drive_file.mime_type = file.mime_type
  drive_file.size = file.size
  drive_file.modified_time = file.modified_time
  drive_file.icon_link = file.icon_link
  drive_file.description = file.description
  drive_file.web_view_link = file.web_view_link
  drive_file.trashed = file.trashed

  # Assign all key-value pairs from properties attribute to the Spira resource.
  # Could probably be done for all attributes above..
  # Untested so commented to prevent errors
  # file.properties.each do |key, value|
  #   m = "#{key}="
  #   drive_file.send(m, value) if drive_file.respond_to?(m)
  # end if file.properties

  # Add bi-directional relation for parents-children.
  drive_file.parents = file.parents.map do |parent_id|
    parent_uri = RDF::URI.new("https://drive.google.com/drive/folders/#{parent_id}")
    parent_drive_folder = parent_uri.as(Dbtools::Google_Drive::GoogleDriveFolder)
    parent_drive_folder.children << drive_file
    result << parent_drive_folder
    parent_drive_folder
  end if file.parents

  result << drive_file
  return result
end

#serialize_as_rdf(files, verbose: true) ⇒ Object

Serializes a list of files to RDF statements. Yields rdf ntriples for every file.

Parameters:

  • files —

    List of files to be converted. Default is all files.

  • verbose (defaults to: true) —

    Prints progress if true



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# File 'lib/dbtools/converter/google_drive2_rdf_converter.rb', line 71

def serialize_as_rdf(files, verbose: true)
  if verbose
    total = files.size
    count = 0
  end
  files.each do |file|
    if verbose
      count += 1
      STDERR.puts("Converting file to rdf: #{count}/#{total}\t\r")
    end
    # get tree method returns a hash with [id, file].
    file = file[1] if files.is_a?(Hash)
    yield drivefile2rdf(file).map(&:to_ntriples).join("\n")
  end
end