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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/imap'

module Redmine

  module IMAP

    class << self

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

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

        port = imap_options[:port] || '143'

        ssl = !imap_options[:ssl].nil?

        folder = imap_options[:folder] || 'INBOX'

        imap = Net::IMAP.new(host, port, ssl)

        imap.login(imap_options[:username], imap_options[:password]) unless imap_options[:username].nil?

        imap.select(folder)

        imap.search(['NOT', 'SEEN']).each do |message_id|

          msg = imap.fetch(message_id,'RFC822')[0].attr['RFC822']

          logger.debug "Receiving message #{message_id}" if logger && logger.debug?

          if MailHandler.receive(msg, options)

            logger.debug "Message #{message_id} successfully received" if logger && logger.debug?

            if imap_options[:move_on_success]

              imap.copy(message_id, imap_options[:move_on_success])

            end

            imap.store(message_id, "+FLAGS", [:Seen, :Deleted])

          else

            logger.debug "Message #{message_id} can not be processed" if logger && logger.debug?

            imap.store(message_id, "+FLAGS", [:Seen])

            if imap_options[:move_on_failure]

              imap.copy(message_id, imap_options[:move_on_failure])

              imap.store(message_id, "+FLAGS", [:Deleted])

            end

          end

        end

        imap.expunge

      end

      private

      def logger

        ::Rails.logger

      end

    end

  end

end