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SMS and MMS Marketing Notifications with Ruby and Sinatra

Ready to implement SMS and MMS marketing notifications in your Ruby and Sinatra application?

Here's how it will work at a high level:

  1. A possible customer sends an SMS to a Twilio phone number you advertise somewhere.
  2. Your application confirms that the user wants to receive SMS and MMS notifications from your company.
  3. An administrator or marketing campaign manager uses a web form to craft a message that will go out to all subscribers via SMS/MMS message.

Building Blocks

To get this done, you'll be working with the following tools:

  • TwiML and the <Message> Verb: We'll use TwiML to manage interactions initiated by the user via SMS.
  • Messages Resource: We will use the REST API to broadcast messages out to all subscribers.
  • Sinatra Framework: We'll use Sinatra to structure the application.
  • DataMapper: We'll use DataMapper to define the model and to persist it.

Let's get started! Click the button below to move on to the next step of the tutorial.


The Subscriber Model

In order to send out marketing notifications to a subscriber, we need to provide the right model.

  • phone_number will store where to send the notifications.
  • subscribed lets the application identify which subscribers are active (only an active subscriber will receive notifications).

        The Subscriber model


        Next up, let's see how to handle incoming messages.


        Handle Incoming messages

        This is the endpoint that will be called every time our application receives a message.

        It checks if the command sent in the message is one of the commands that we are expecting. Depending on that it returns a message formatted in TwiML - either a confirmation or a helpful message with our legal commands.

        Twilio can send your web application an HTTP request when certain events happen, such as an incoming text message to one of your Twilio phone numbers. These requests are called webhooks, or status callbacks. For more, check out our guide to Getting Started with Twilio Webhooks. Find other webhook pages, such as a security guide and an FAQ in the Webhooks section of the docs.


              SMS and MMS Marketing Notifications


              Let's see how to create new subscribers next.

              Create New Subscribers!

              Create New Subscribers

              On an incoming message, we look in the database for a matching number. If there isn't one, we create a new Subscriber. If it does, we validate the command from the message body and send an appropriate TwiML response.

              And that's all we want at this step! We've created a Subscriber model to keep track of the people that have requested our messages. We also have saved their information on the database after receiving a text message with an 'add' command.


                    Register a new subscriber in the database


                    Now let's look at how our users can manage their subscriptions.


                    Managing Subscriptions

                    We want to provide our users with two SMS commands to manage their subscription status: add and remove.

                    These commands will toggle a boolean flag for a Subscriber record in the database and will determine whether or not our user will receive messages from our marketing campaign. We don't opt them in automatically - rather, we have them confirm that they want to receive our messages.

                    To make this happen, we will need to update the controller logic which handles the incoming text message to do a couple things:

                    • If it is an add command or remove command, then create/update her or his subscription with the right status in the database.
                    • If it is a command we don't recognize, then send a message explaining our available commands.

                          Validate and execute a subscriber's command


                          Next up, let's look at how to send notifications.

                          How Do I Send Notifications?

                          Sending Notifications

                          When we receive a form submission from the frontend, we first grab the message text and optional image URL. Second, we loop through all Subscribers and call the send_message method to send the message out.

                          When the messages are on their way, we render back the index page with a success message (and make the marketing team happy).


                                Webhook to send a message to all active subscribers


                                Let's take an even closer look at how to send SMS or MMS notifications.

                                Zoom in on Sending MMS and SMS Messages

                                Send SMS or MMS Notifications

                                In the method send_message we create a Twilio REST API client that can be used to send SMS and MMS messages. The client requires your Twilio account credentials (an account SID and auth token), which can be found in the console:

                                Account Credentials

                                Next all we need to do is call create on the client.messages object in order to send our message. The Twilio Message API call requires a from, to and body parameter. The media_url is optional.


                                      Use Twilio Ruby client to send a message


                                      That's it! We've just implemented an opt-in process and an administrative interface to run an SMS and MMS marketing campaign.

                                      Next let's look at what other features you might like to deploy.

                                      What Else Can I Build?

                                      Where to Next?

                                      Twilio and Ruby mix incredibly well. To prove it, here are two excellent tutorials on how to add other features:

                                      Employee Directory

                                      Add an interface to your employee directory to look up contact information through your phone.

                                      Automated Survey

                                      Follow along with this simple tutorial to see the code necessary to implement automated surveys that integrate directly with your CRM and customer database.

                                      Did this help?

                                      Thanks for checking out this tutorial! Tweet @twilio to let us know what you think!

                                      Jarod Reyes Hector Ortega Kat King Mica Swyers Andrew Baker Paul Kamp Stephanie Marchante
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                                      Need some help?

                                      We all do sometimes; code is hard. Get help now from our support team, or lean on the wisdom of the crowd by visiting Twilio's Stack Overflow Collective or browsing the Twilio tag on Stack Overflow.


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