module Backburner
  module Logger

    # Loads in instance and class levels
    def self.included(base)
      base.extend self
    end

    # Print out when a job is about to begin
    def log_job_begin(body)
      log [ "Working", body ].join(' ')
      @job_begun = Time.now
    end

    # Print out when a job completed
    def log_job_end(name, failed=false)
      ellapsed = Time.now - @job_begun
      ms = (ellapsed.to_f * 1000).to_i
      log "Finished #{name} in #{ms}ms #{failed ? ' (failed)' : ''}"
    end

    # Prints message about failure when beastalk cannot be connected
    #
    # @example
    #   failed_connection(ex)
    def failed_connection(e)
      log_error exception_message(e)
      log_error "*** Failed connection to #{connection.url}"
      log_error "*** Check that beanstalkd is running (or set a different beanstalk url)"
      exit 1
    end

    # Print a message to stdout
    #
    # @example
    #   log("Working on task")
    def log(msg)
      puts msg
    end

    # Print an error to stderr
    #
    # @example
    #   log_error("Task failed!")
    def log_error(msg)
      $stderr.puts msg
    end

  end
end