send a "mood" picture to a user using the Twilio API

extensions.conf

[ck987_mms]
exten => s,1,Background(/home/ck987/asterisk_sounds/moods)
	same => n,WaitExten(10)
exten => 1,1,System(/home/ck987/ruby/mms_send.rb ${CALLERID(num)} grumpy)
	same => n,Hangup
exten => 2,1,System(/home/ck987/ruby/mms_send.rb ${CALLERID(num)} happy)
	same => n,Hangup
exten => 3,1,System(/home/ck987/ruby/mms_send.rb ${CALLERID(num)} excited)
	same => n,Hangup
exten => 4,1,System(/home/ck987/ruby/mms_send.rb ${CALLERID(num)} sad)
	same => n,Hangup

mms_send.rb

#!/usr/bin/env ruby
require 'twilio-ruby'

#usage:   mms_send.rb <phone-number> <mood>
#example: mms_send.rb 12125551212 grumpy

@account_sid = "xxx" # your account SID here
@auth_token = "xxx" # your authtoken here
@from_number = "1917xxxxxx"# your twilio phone number here
@to_number = ARGV[0]  # the number that will receive the sms
# set up a client to talk to the Twilio REST API
@client = Twilio::REST::Client.new(@account_sid, @auth_token)

moods = { :happy => "http://i.imgur.com/aQvVqVZ.gif",
	  :grumpy => "http://i.imgur.com/VE6KwSq.jpg",
	  :excited => "http://i.imgur.com/Bq7Mpak.jpg",
	  :sad => "http://i.imgur.com/tM7fWA7.jpg" }

mood = ARGV[1]

mood_url = moods[mood.to_sym]
@account = @client.account
@message = @account.messages.create({ :from => @from_number,
					  :to => @to_number,
					  :body => 'Here\'s your mood.',
					  :media_url => mood_url })
puts @message