Export Scholar work information including count of files and file sizes

Scholar_work_info.rb

def get_file_size(file)
  @total_size = @total_size + file.file_size.first.to_i
end

def get_object(object_id)
  object = ActiveFedora::Base.find object_id
  if object.class == FileSet
    get_file_size(object)
  end
end

File.write('/tmp/export.csv', "\"Work Title\",\"PURL\",\"DOI\",\"File Count\",\"Size (GB)\"\n")
total_size_by_type = {}
work_types = [Dataset]
work_types.each do |type|
  @total_size = 0
  type.all.each do |work|
    @total_size = 0
    @num_files = 0
    work.ordered_member_ids.each do |object_id|
      get_object(object_id)
      @num_files = @num_files + 1
    end
    @total_size = @total_size.to_f / 1000000000
    collection = ''
    unless work.member_of_collections.first.nil?
      collection = work.member_of_collections.first.title.first
    end
	File.write('/tmp/export.csv', "\"#{work.title.first.to_s}\",\"https://scholar.uc.edu/show/#{work.id.to_s}\",\"#{work.doi.to_s}\",\"#{@num_files}\",\"#{@total_size.round(4)}\",\"#{collection}\"\n", mode: 'a')
  end
  total_size_by_type[type.to_s] = @total_size
end