exercise.rb

#######################
# Example Usage:
#######################
#
# mailbox = BadMailProcessor::Pop3.new(server, username, password)
# BadMailProcessor.run(mailbox) do |bounce|
#   User.bounce(bounce[:email_address])
#   my_action2
# end
#

class BadMailProcessor

  EMAIL_REGEX = /\b[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}\b/i

  def self.run(mailbox)
    mailbox.bounces.each do |bounce|
      yield { :email_address => bounce[:email_address], :bounce_code => bounce[:bounce_code] }
    end
  end

end

class BadMailProcessor::Pop3

  attr_accessor :bounces

  def initialize
    conn = Net::POP3.new(server)
    conn.start(username, password)

    conn.emails.each do |email|
      tmail = TMail::Mail.parse(email.pop)
      bounce = BounceEmail::Mail.new(tmail)
      if bounce.isbounce && bounce.type =~ /Permanent/
        email_address = tmail.body.scan(BadMailProcessor::EMAIL_REGEX).compact.
          reject { |address| address =~ /recruitmilitary\.com$/i }.first
        @bounces << { :email_address => :email_address, :bounce_code => bounce.code } if email_address
      end
      email.delete
    end
    conn.finish
  end

end