#
# Copyright (c) 2006-2011 Hal Brodigan (postmodern.mod3 at gmail.com)
#
# This file is part of Ronin Support.
#
# Ronin Support is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ronin Support 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with Ronin Support.  If not, see <http://www.gnu.org/licenses/>.
#

require 'ronin/network/esmtp'
require 'ronin/ui/output/helpers'
require 'ronin/mixin'

require 'parameters'

module Ronin
  module Network
    module Mixins
      #
      # Adds ESMTP convenience methods and connection parameters to a class.
      #
      # Defines the following parameters:
      #
      # * `host` (`String`) - ESMTP host.
      # * `port` (`Integer`) - ESMTP port.
      # * `esmtp_login` (`String`) - ESMTP authentication method to use.
      # * `esmtp_user` (`String`) - ESMTP user to login as.
      # * `esmtp_password` (`String`) - ESMTP password to login with.
      #
      module ESMTP
        include Mixin

        mixin UI::Output::Helpers, Parameters

        mixin do
          # ESMTP host
          parameter :host, :type => String,
                           :description => 'ESMTP host'

          # ESMTP port
          parameter :port, :type => Integer,
                           :description => 'ESMTP port'

          # ESMTP authentication method to use
          parameter :esmtp_login, :type => String,
                                  :description => 'ESMTP authentication method to use'

          # ESMTP user to login as
          parameter :esmtp_user, :type => String,
                                 :description => 'ESMTP user to login as'

          # ESMTP password to login with
          parameter :esmtp_password, :type => String,
                                     :description => 'ESMTP password to login with'
        end

        protected

        #
        # @see Ronin::Network::SMTP.message.
        #
        # @api public
        #
        def esmtp_message(options={},&block)
          Network::SMTP.message(options,&block)
        end

        #
        # Creates a connection to the ESMTP server. The `host`, `port`,
        # `esmtp_login`, `esmtp_user` and `esmtp_password` parameters
        # will also be used to connect to the ESMTP server.
        #
        # @param [Hash] options
        #   Additional options.
        #
        # @option options [Integer] :port (Ronin::Network::SMTP.default_port)
        #  The port to connect to.
        #
        # @option options [String] :helo
        #   The HELO domain.
        #
        # @option options [Symbol] :auth
        #   The type of authentication to use.
        #   Can be either `:login`, `:plain`, or `:cram_md5`.
        #
        # @option options [String] :user
        #   The user-name to authenticate with.
        #
        # @option options [String] :password
        #   The password to authenticate with.
        #
        # @yield [session]
        #   If a block is given, it will be passed an ESMTP enabled
        #   session object.
        #
        # @yieldparam [Net::SMTP] session
        #   The ESMTP session.
        #
        # @return [Net::SMTP]
        #   The ESMTP enabled session.
        #
        # @api public
        #
        def esmtp_connect(options={},&block)
          options[:port] ||= self.port
          options[:login] ||= self.esmtp_login
          options[:user] ||= self.esmtp_user
          options[:password] ||= self.esmtp_password

          if self.port
            print_info "Connecting to #{self.host}:#{self.port} ..."
          else
            print_info "Connecting to #{self.host} ..."
          end

          return ::Net.esmtp_connect(self.host,options,&block)
        end

        #
        # Starts a session with the ESMTP server. The `host`, `port`,
        # `esmtp_login`, `esmtp_user` and `esmtp_password` parameters
        # will also be used to connect to the ESMTP server.
        #
        # @param [Hash] options
        #   Additional options.
        #
        # @yield [session]
        #   If a block is given, it will be passed an ESMTP enabled
        #   session object. After the block has returned, the session
        #   will be closed.
        #
        # @yieldparam [Net::SMTP] session
        #   The ESMTP session.
        #
        # @see esmtp_connect
        #
        # @api public
        #
        def esmtp_session(options={})
          esmtp_connect(options) do |sess|
            yield sess if block_given?

            sess.close

            if self.port
              print_info "Disconnecting from #{self.host}:#{self.port}"
            else
              print_info "Disconnecting from #{self.host}"
            end
          end
        end
      end
    end
  end
end