Twilio Click to call in the inbox controller

inbox_controller.rb

require 'twilio-ruby'

class InboxController < ApplicationController
	BASE_URL = 'http://www.andyjiang.com/'
	
	# /click-to-call-request
	def click_to_call(calling_to)
		# debugging purposes.
		twilio_number = '4154444444'
		calling_to = digits_only(calling_to)

		agent_phone = '5555555555'
		caller_id = agent_phone

		# When we call the agent (andy + our apartment), we set the caller ID to the party we're eventually
		# calling. Why? So you could call them back from normal cellphone later.
		begin
			@client = Twilio::REST::Client.new ACCOUNT_SID, AUTH_TOKEN
			@client.account.calls.create(
				:from => twilio_number,
				:to => agent_phone,
				:url => BASE_URL + '/click-to-call-callscreen?calling_to=' + calling_to + '&caller_id=' + caller_id
			)
			puts "click to call initiated."
		rescue
			400
		end

		render 'app/views/inbox/sfapartments.html', :formats => [:html] 
	end
	
	# /click-to-call-callscreen
	# This handler receives an HTTP callback from Twilio once the agent has picked up
	# their phone. It first verifies that they're ready to receive the call (to avoid
	# voicemail) and then defers to the final twiml URL.
	def click_to_call_callscreen
		@post_to = BASE_URL + '/click-to-call-twiml?calling_to=' + params['calling_to'] + '&caller_id=' + params['caller_id']
		render :action => 'clicktocallcallscreen.xml.builder', :layout => false
	end

	# /click-to-call-twiml
	# This handler is fired if the callscreen detected a digit
	def click_to_call_twiml
		@calling_to = params['calling_to']
		@caller_id = params['caller_id']
		render :action => 'clicktocall.xml.builder', :layout => false
	end
	
	def digits_only(string)
		return string.gsub(/[^[0-9]]/, "")
	end
end