twilio.rb

require 'twilio-ruby'
require 'thread'

# Simple interface to send long SMS over twilio and test it like
# ActionMailer. Requires gem twilio-ruby, and following constants from
# your twilio console: SMS_ACCOUNT_SID, SMS_ACCONT_TOKEN,SMS_FROM_NUMBER.
#
# Thread safe.
#
# Enjoy ;) real.sergeych@gmail.com
#
class TwilioSms
  @@twilio_lock = Mutex.new

  if defined?(Rails) && Rails.env.test?
    @@deliveries = []

     # in test more use TwilioSms.deliveries array which holds { to:, text:} objects
    def self.deliveries
      @@deliveries
    end

    # send an SMS
    def self.send to:, text:, **kwargs
      @@deliveries << OpenStruct.new({ to: to, text: text })
    end

  else

    # send an SMS
    def self.send to:, text:, **kwargs
      # set up a client to talk to the Twilio REST API
      @@twilio_lock.synchronize {
        @@client  ||= Twilio::REST::Client.new(SMS_ACCOUNT_SID, SMS_ACCONT_TOKEN)
        account = @@client.account
        account.messages.create({ :from => SMS_FROM_NUMBER, :to => to, :body => text })
      }
    end

  end
end