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# Redmine - project management software

# Copyright (C) 2006-2013  Jean-Philippe Lang

#

# This program is free software; you can redistribute it and/or

# modify it under the terms of the GNU General Public License

# as published by the Free Software Foundation; either version 2

# of the License, or (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

require 'net/pop'

module Redmine

  module POP3

    class << self

      def check(pop_options={}, options={})

        host = pop_options[:host] || '127.0.0.1'

        port = pop_options[:port] || '110'

        apop = (pop_options[:apop].to_s == '1')

        delete_unprocessed = (pop_options[:delete_unprocessed].to_s == '1')

        pop = Net::POP3.APOP(apop).new(host,port)

        logger.debug "Connecting to #{host}..." if logger && logger.debug?

        pop.start(pop_options[:username], pop_options[:password]) do |pop_session|

          if pop_session.mails.empty?

            logger.debug "No email to process" if logger && logger.debug?

          else

            logger.debug "#{pop_session.mails.size} email(s) to process..." if logger && logger.debug?

            pop_session.each_mail do |msg|

              message = msg.pop

              message_id = (message =~ /^Message-I[dD]: (.*)/ ? $1 : '').strip

              if MailHandler.receive(message, options)

                msg.delete

                logger.debug "--> Message #{message_id} processed and deleted from the server" if logger && logger.debug?

              else

                if delete_unprocessed

                  msg.delete

                  logger.debug "--> Message #{message_id} NOT processed and deleted from the server" if logger && logger.debug?

                else

                  logger.debug "--> Message #{message_id} NOT processed and left on the server" if logger && logger.debug?

                end

              end

            end

          end

        end

      end

      private

      def logger

        ::Rails.logger

      end

    end

  end

end