module RequestLogAnalyzer::FileFormat
  # The DelayedJob4 file format parsed log files that are created by DelayedJob 4.0 or higher.
  # By default, the log file can be found in RAILS_ROOT/log/delayed_job.log
  class DelayedJob4 < Base
    extend CommonRegularExpressions

    line_definition :job_completed do |line|
      line.header = true
      line.footer = true
      line.regexp = /(#{timestamp('%Y-%m-%dT%H:%M:%S%z')}): \[Worker\(\S+ host:(#{hostname_or_ip_address}) pid:(\d+)\)\] Job (.+) \(id=\d+\) COMPLETED after (\d+\.\d+)/
      line.capture(:timestamp).as(:timestamp)
      line.capture(:host)
      line.capture(:pid).as(:integer)
      line.capture(:job)
      line.capture(:duration).as(:duration, unit: :sec)
    end

    line_definition :job_failed do |line|
      line.header = true
      line.footer = true
      line.regexp = /(#{timestamp('%Y-%m-%dT%H:%M:%S%z')}): \[Worker\(\S+ host:(#{hostname_or_ip_address}) pid:(\d+)\)\] Job (.+) FAILED \((\d+) prior attempts\) with (.+)/
      line.capture(:timestamp).as(:timestamp)
      line.capture(:host)
      line.capture(:pid).as(:integer)
      line.capture(:job)
      line.capture(:attempts).as(:integer)
      line.capture(:error)
    end

    line_definition :job_deleted do |line|
      line.header = true
      line.footer = true
      line.regexp = /(#{timestamp('%Y-%m-%dT%H:%M:%S%z')}): \[Worker\(\S+ host:(#{hostname_or_ip_address}) pid:(\d+)\)\] Job (.+) REMOVED permanently because of (\d+) consecutive failures/
      line.capture(:timestamp).as(:timestamp)
      line.capture(:host)
      line.capture(:pid).as(:integer)
      line.capture(:job)
      line.capture(:failures).as(:integer)
    end

    report do |analyze|
      analyze.timespan
      analyze.hourly_spread

      analyze.frequency :job, line_type: :job_completed, title: 'Completed jobs'
      analyze.frequency :job, category: lambda { |r| "#{r[:job]} #{r[:error]}" }, line_type: :job_failed, title: 'Failed jobs'
      analyze.frequency :failures, category: :job, line_type: :job_deleted, title: 'Deleted jobs'
      analyze.duration :duration, category: :job, line_type: :job_completed, title: 'Job duration'
    end
  end
end