Using LumenVox with RAGI

You can use something like the following to access LumenVox from RAGI.

  # speech_handler.rb
  require 'ragi/call_handler'
  
  module RAGI
    # reopen the CallConnection class and add new methods 
    class CallConnection
  
      #
      # returns the name of the calling function or '<unknown>'
      #
      def callee(back=1)
        /in `([a-z_\?\!]+)'/ =~ caller(back).first
        "#{$1}" || '<unknown>'
      end
  
      #
      # call lumenvox applications via asterisk exec, we will raise an exception if it fails
      #
      # note : classify assumes rails "active_support" is available and loaded
      def lumenvox_cmd(func,*params)
        var = exec(func.classify, params.join(","))
        var = var.to_i
        raise "Exception #{var} : running #{func.classify}(#{params.join(",")})" if var < 0
        var
      end
  
      def speech_start
        lumenvox_cmd(callee())
      end
  
      def speech_create
        lumenvox_cmd(callee())
      end
  
      def speech_destroy
        lumenvox_cmd(callee())
      end
  
      def speech_activate_grammar(grammar)
        lumenvox_cmd(callee(),grammar)
      end
  
      def speech_deactivate_grammar(grammar)
        lumenvox_cmd(callee(),grammar)
      end
  
      def speech_background(background)
        lumenvox_cmd(callee(),background)
      end
    end
  end

  class SpeechHandler < RAGI::CallHandler
    
    # When the RAGI server connects from Asterisk over AGI to our app, it calls this method.	
    def dialup
      answer  # answer the call
      wait(1)  # give it 1 seconds to make sure the connection is established
   
      speech_create
    
      # name of grammar as defined in /etc/asterisk/lumenvox.conf
      speech_activate_grammar("grammar")
      speech_start

      # prompt from sounds directory 
      speech_background("beep|5") # you could also use "tt-weasels" or add your own

      # get the wordslists and score 
      xml = get_variable("SPEECH_TEXT(0)")
      score=get_variable("SPEECH_SCORE(0)")
      speech_deactivate_grammar("grammar")
      speech_destroy

      # process the xml and score as you like
      # do some thing with recognized words
    rescue 
      puts $! 
    ensure      
      hang_up  #end the call
    end

  end