You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: rpmlint_log_extractor.rb
    path of file: ./repos/open-build-service/src/api/app/services
    
    the code of the file until where you have to start completion: class RpmlintLogExtractor
  attr_reader :project, :package, :repository, :architecture, :log_content

  def initialize(attributes = {})
    @project = attributes[:project]
    @package = attributes[:package]
    @repository = attributes[:repository]
    @architecture = attributes[:architecture]

    @log_content = ''

    # metrics
    @rpmlint_log_file_found = true
    @parse_internal_log_file = false
    @mark_found = true
  end

  def call
    time_start = Time.now.to_f
    content = begin
      # Retrieve the content of the 'rpmlint.log' file
      Backend::Api::BuildResults::Binaries.rpmlint_log(project, package, repository, architecture)
    rescue Backend::NotFound
    
  def retrieve_rpmlint_log_from_log
    @parse_internal_log_file = true

    log_content = Backend::Api::BuildResults::Binaries.file(project, repository, architecture, package, '_log')
    # Remove invalid byte sequences
    log_content.scrub!

    # The OBS rpmlint mark is defined here: https://github.com/openSUSE/obs-build/blob/44e43abe9da522c1c6685742aecc55be158da55b/build-recipe-spec#L331
    mark1 = '\[\s*\d+s\]\s\n'
    mark2 = '\[\s*\d+s\]\sRPMLINT report:\n'
    mark3 = '\[\s*\d+s\]\s===============\n'

    log_content.sub!(/.+#{mark1}#{mark2}#{mark3}/m, '')

    # Return if the OBS rpmlint mark was not found
    return unless (@mark_found = log_content.present?)

    # Remove lines after last line of rpmlint log
    mark1 = '\[\s*\d+s\] +\d+ packages and \d+ specfiles checked; [^\n]+\n'
    log_content = log_content.sub(/(.+#{mark1}).+/m, '\1')

    # Remove column of brackets and times
    log_content.gsub(/^\[\s*\d+s\] /, '')
  end