=========================================================
FreeSWITCHeR
Copyright (c) 2009 The Rubyists (Jayson Vaughn, Tj Vanderpoel, Michael Fellinger, Kevin Berry) 
Distributed under the terms of the MIT License.
==========================================================

ABOUT
-----
A ruby library for interacting with the "FreeSWITCH" (http://www.freeswitch.org) opensource telephony platform

REQUIREMENTS
------------
* ruby (>= 1.8)
* eventmachine (If you wish to use Outbound and Inbound listener)

USAGE
-----

An Outbound Event Listener Example that reads and returns DTMF input:
--------------------------------------------------------------------

Simply just create a subclass of FSR::Listner::Outbound and all
new calls/sessions will invoke the "session_initiated" callback method.
 
<b>NOTE</b>: FSR uses blocks within the 'session_inititated' method to ensure that the next "freeswich command" is not executed until the previous "Freeswitch command" has finished.  (Basically a continuation) This is kicked off by "answer do". 

  #!/usr/bin/ruby
  require 'fsr'
  require 'fsr/listener/outbound'

  class OutboundDemo < FSR::Listener::Outbound

    def session_initiated
      exten = @session.headers[:caller_caller_id_number]
      FSR::Log.info "*** Answering incoming call from #{exten}"

      answer do
        FSR::Log.info "***Reading DTMF from #{exten}"
        read("/home/freeswitch/freeswitch/sounds/music/8000/sweet.wav", 4, 10, "input", 7000) do |read_var|
          FSR::Log.info "***Success, grabbed #{read_var.to_s.strip} from #{exten}"
          # Tell the caller what they entered
          speak("Got the DTMF of: #{read_var.to_s.strip}") do 
            #Hangup the call
            hangup 
          end
        end
      end

    end

  end

  FSR.start_oes! OutboundDemo, :port => 8084, :host => "127.0.0.1"

An Inbound Event Socket Listener example using FreeSWITCHeR's hook system:
--------------------------------------------------------------------------

  #!/usr/bin/ruby
  require 'fsr'
  require "fsr/listener/inbound"

  class MyEventListener < FSR::Listener::Inbound
    def before_session
      # This adds a hook on CHANNEL_CREATE events. You can also create a method to handle the event you're after. See the next example
      add_event(:CHANNEL_CREATE) { |e| p e }

      # This adds a hook on CHANNEL_HANGUP events with a callback method.
      add_event(:CHANNEL_HANGUP) { |e| channel_hangup(e) }
    end

    def channel_hangup(event)
      p event
    end

    def on_event(event)
      # This gets called for _every_ event that's subscribed (through add_event)
      p event
    end
  end


  # Start FSR Inbound Listener
  FSR.start_ies!(MyEventListener, :host => "localhost", :port => 8021)

A More Advanced Example, Publishing Events To A Web Socket:
-----------------------------------------------------------

  class MyWebSocketClient < Struct.new(:reporter, :socket, :channel_id)
    Channel = EM::Channel.new

    def initialize(reporter, socket)
      self.reporter, self.socket = reporter, socket
      socket.onopen(&method(:on_open))
      socket.onmessage(&method(:on_message))
      socket.onclose(&method(:on_close))
    end

    def on_message(json)
      msg = JSON.parse(json)
      FSR::Log.info "Websocket got #{msg}"
    end

    def send(msg)
      socket.send(msg.to_json)
    end

    def on_open
      FSR::Log.info("Subscribed listener")
      self.channel_id = Channel.subscribe { |message| send(message) }
    end

    def on_close
      Channel.unsubscribe(channel_id)
      FSR::Log.info("Unsubscribed listener")
    end
  end

  # Add the Channel to your event listener
  class MyEventListener
    def on_event(event)
      MyWebSocketClient::Channel << event.content
    end
  end

  # Start Listener within and EM.run
  EM.epoll
  EM.run do
    server, port = '127.0.0.1', 8021
    EventMachine.connect(server, port, MyEventListener, auth: 'MyPassword') do |listener|
      FSR::Log.info "MyEventListener connected to #{server} on #{port}"
      EventMachine.start_server('0.0.0.0'), 8080, EventSocket::WebSocket::Connection, {}) do |websocket|
        MyWebSocketClient.new(listener, websocket)
      end
    end
  end


An Inbound Event Socket Listener example using the on_event callback method instead of hooks:
---------------------------------------------------------------------------------------------

  #!/usr/bin/ruby
  require 'pp'
  require 'fsr'
  require "fsr/listener/inbound"


  class IesDemo < FSR::Listener::Inbound

    def on_event
      pp event.headers
      pp event.content[:event_name]
    end

  end

  FSR.start_ies!(IesDemo, :host => "localhost", :port => 8021, :auth => "ClueCon")


An example of using FSR::CommandSocket to originate a new call in irb:
----------------------------------------------------------------------

  irb(main):001:0> require 'fsr'
  => true

  irb(main):002:0> FSR.load_all_commands
  => [:sofia, :originate]

  irb(main):003:0> sock = FSR::CommandSocket.new
  => #<FSR::CommandSocket:0xb7a89104 @server="127.0.0.1", @socket=#<TCPSocket:0xb7a8908c>, @port="8021", @auth="ClueCon">

  irb(main):007:0> sock.originate(:target => 'sofia/gateway/carlos/8179395222', :endpoint => FSR::App::Bridge.new("user/bougyman")).run
  => {"Job-UUID"=>"732075a4-7dd5-4258-b124-6284a82a5ae7", "body"=>"", "Content-Type"=>"command/reply", "Reply-Text"=>"+OK Job-UUID: 732075a4-7dd5-4258-b124-6284a82a5ae7"}



SUPPORT
-------
Home page at http://code.rubyists.com/projects/fs
#rubyists on FreeNode