Browser Calls with Ruby and Rails

class TicketsController < ApplicationController
  def create
    support_ticket = Ticket.new(ticket_params)

    if support_ticket.save
      redirect_to root_path, notice:
        'Your ticket was submitted! An agent will call you soon.'
    else
      redirect_to root_path, flash:
        { error: support_ticket.errors.full_messages }
    end
  end

  def ticket_params
    params.require(:ticket).permit(:name, :phone_number, :description)
  end
end

<h2>Support Tickets</h2>

<p class="lead">
This is the list of most recent support tickets. Click the "Call customer" button to start a phone call from your browser.
</p>

<div class="row">
  <div class="col-md-4 col-md-push-8">
    <div class="panel panel-primary client-controls">
      <div class="panel-heading">
        <h3 class="panel-title">Make a call</h3>
      </div>
      <div class="panel-body">
        <p><strong>Status</strong></p>
        <div class="well well-sm" id="call-status">
          Connecting to Twilio...
        </div>

        <button class="btn btn-lg btn-success answer-button" disabled>Answer call</button>
        <button class="btn btn-lg btn-danger hangup-button" disabled onclick="hangUp()">Hang up</button>
      </div>
    </div>
  </div>

  <div class="col-md-8 col-md-pull-4">
    <% @tickets.each do |ticket| %>
    <div class="panel panel-default">
      <div class="panel-heading">
        <h3 class="panel-title">Ticket #<%= ticket.id %>  <small class="pull-right"><%= ticket.created_at %></small></h3>
      </div>

      <div class="panel-body">

        <div class="pull-right">
          <button onclick="callCustomer('<%= ticket.phone_number %>')" type="button" class="btn btn-primary btn-lg call-customer-button">
            <span class="glyphicon glyphicon-earphone" aria-hidden="true"></span>
            Call customer
          </button>
        </div>

        <p><strong>Name:</strong> <%= ticket.name %></p>
        <p><strong>Phone number:</strong> <%= ticket.phone_number %></p>
        <p><strong>Description:</strong></p>
        <%= ticket.description %>
      </div>
    </div>
    <% end %>
  </div>
</div>

require 'pry'

class TwilioCapability
  def self.generate(role)
    # To find TWILIO_ACCOUNT_SID, TWILIO_AUTH_TOKEN visit
    # https://www.twilio.com/user/account
    account_sid     = ENV['TWILIO_ACCOUNT_SID']
    auth_token      = ENV['TWILIO_AUTH_TOKEN']
    application_sid = ENV['TWIML_APPLICATION_SID']
    # binding.pry
    capability = Twilio::JWT::ClientCapability.new(account_sid, auth_token)
    outgoing_scope = Twilio::JWT::ClientCapability::OutgoingClientScope.new(application_sid, role)
    capability.add_scope outgoing_scope

    incoming_scope = Twilio::JWT::ClientCapability::IncomingClientScope.new(role)
    capability.add_scope incoming_scope


    capability.to_s
  end
end

/**
 * Twilio Client configuration for the browser-calls-rails
 * example application.
 */

// Store some selectors for elements we'll reuse
var callStatus = $("#call-status");
var answerButton = $(".answer-button");
var callSupportButton = $(".call-support-button");
var hangUpButton = $(".hangup-button");
var callCustomerButtons = $(".call-customer-button");

/* Helper function to update the call status bar */
function updateCallStatus(status) {
  callStatus.text(status);
}

/* Get a Twilio Client token with an AJAX request */
$(document).ready(function() {
  $.post("/token/generate", {page: window.location.pathname}, function(data) {
    // Set up the Twilio Client Device with the token
    Twilio.Device.setup(data.token);
  });
});

/* Callback to let us know Twilio Client is ready */
Twilio.Device.ready(function (device) {
  updateCallStatus("Ready");
});

/* Report any errors to the call status display */
Twilio.Device.error(function (error) {
  updateCallStatus("ERROR: " + error.message);
});

/* Callback for when Twilio Client initiates a new connection */
Twilio.Device.connect(function (connection) {
  // Enable the hang up button and disable the call buttons
  hangUpButton.prop("disabled", false);
  callCustomerButtons.prop("disabled", true);
  callSupportButton.prop("disabled", true);
  answerButton.prop("disabled", true);

  // If phoneNumber is part of the connection, this is a call from a
  // support agent to a customer's phone
  if ("phoneNumber" in connection.message) {
    updateCallStatus("In call with " + connection.message.phoneNumber);
  } else {
    // This is a call from a website user to a support agent
    updateCallStatus("In call with support");
  }
});

/* Callback for when a call ends */
Twilio.Device.disconnect(function(connection) {
  // Disable the hangup button and enable the call buttons
  hangUpButton.prop("disabled", true);
  callCustomerButtons.prop("disabled", false);
  callSupportButton.prop("disabled", false);

  updateCallStatus("Ready");
});

/* Callback for when Twilio Client receives a new incoming call */
Twilio.Device.incoming(function(connection) {
  updateCallStatus("Incoming support call");

  // Set a callback to be executed when the connection is accepted
  connection.accept(function() {
    updateCallStatus("In call with customer");
  });

  // Set a callback on the answer button and enable it
  answerButton.click(function() {
    connection.accept();
  });
  answerButton.prop("disabled", false);
});

/* Call a customer from a support ticket */
function callCustomer(phoneNumber) {
  updateCallStatus("Calling " + phoneNumber + "...");

  var params = {"phoneNumber": phoneNumber};
  Twilio.Device.connect(params);
}

/* Call the support_agent from the home page */
function callSupport() {
  updateCallStatus("Calling support...");

  // Our backend will assume that no params means a call to support_agent
  Twilio.Device.connect();
}

/* End a call */
function hangUp() {
  Twilio.Device.disconnectAll();
}

/**
 * Twilio Client configuration for the browser-calls-rails
 * example application.
 */

// Store some selectors for elements we'll reuse
var callStatus = $("#call-status");
var answerButton = $(".answer-button");
var callSupportButton = $(".call-support-button");
var hangUpButton = $(".hangup-button");
var callCustomerButtons = $(".call-customer-button");

/* Helper function to update the call status bar */
function updateCallStatus(status) {
  callStatus.text(status);
}

/* Get a Twilio Client token with an AJAX request */
$(document).ready(function() {
  $.post("/token/generate", {page: window.location.pathname}, function(data) {
    // Set up the Twilio Client Device with the token
    Twilio.Device.setup(data.token);
  });
});

/* Callback to let us know Twilio Client is ready */
Twilio.Device.ready(function (device) {
  updateCallStatus("Ready");
});

/* Report any errors to the call status display */
Twilio.Device.error(function (error) {
  updateCallStatus("ERROR: " + error.message);
});

/* Callback for when Twilio Client initiates a new connection */
Twilio.Device.connect(function (connection) {
  // Enable the hang up button and disable the call buttons
  hangUpButton.prop("disabled", false);
  callCustomerButtons.prop("disabled", true);
  callSupportButton.prop("disabled", true);
  answerButton.prop("disabled", true);

  // If phoneNumber is part of the connection, this is a call from a
  // support agent to a customer's phone
  if ("phoneNumber" in connection.message) {
    updateCallStatus("In call with " + connection.message.phoneNumber);
  } else {
    // This is a call from a website user to a support agent
    updateCallStatus("In call with support");
  }
});

/* Callback for when a call ends */
Twilio.Device.disconnect(function(connection) {
  // Disable the hangup button and enable the call buttons
  hangUpButton.prop("disabled", true);
  callCustomerButtons.prop("disabled", false);
  callSupportButton.prop("disabled", false);

  updateCallStatus("Ready");
});

/* Callback for when Twilio Client receives a new incoming call */
Twilio.Device.incoming(function(connection) {
  updateCallStatus("Incoming support call");

  // Set a callback to be executed when the connection is accepted
  connection.accept(function() {
    updateCallStatus("In call with customer");
  });

  // Set a callback on the answer button and enable it
  answerButton.click(function() {
    connection.accept();
  });
  answerButton.prop("disabled", false);
});

/* Call a customer from a support ticket */
function callCustomer(phoneNumber) {
  updateCallStatus("Calling " + phoneNumber + "...");

  var params = {"phoneNumber": phoneNumber};
  Twilio.Device.connect(params);
}

/* Call the support_agent from the home page */
function callSupport() {
  updateCallStatus("Calling support...");

  // Our backend will assume that no params means a call to support_agent
  Twilio.Device.connect();
}

/* End a call */
function hangUp() {
  Twilio.Device.disconnectAll();
}

class CallController < ApplicationController
  skip_before_filter :verify_authenticity_token

  def connect
    render xml: twilio_reponse
  end

  private

  def twilio_reponse
    twilio_number = ENV['TWILIO_PHONE_NUMBER']

    res = Twilio::TwiML::VoiceResponse.new do |response|
      dial = Twilio::TwiML::Dial.new caller_id: twilio_number

      if params.include?(:phoneNumber)
        dial.number params[:phoneNumber]
      else
        dial.client('support_agent')
      end
      response.append(dial)
    end
    return res.to_s
  end
end

/**
 * Twilio Client configuration for the browser-calls-rails
 * example application.
 */

// Store some selectors for elements we'll reuse
var callStatus = $("#call-status");
var answerButton = $(".answer-button");
var callSupportButton = $(".call-support-button");
var hangUpButton = $(".hangup-button");
var callCustomerButtons = $(".call-customer-button");

/* Helper function to update the call status bar */
function updateCallStatus(status) {
  callStatus.text(status);
}

/* Get a Twilio Client token with an AJAX request */
$(document).ready(function() {
  $.post("/token/generate", {page: window.location.pathname}, function(data) {
    // Set up the Twilio Client Device with the token
    Twilio.Device.setup(data.token);
  });
});

/* Callback to let us know Twilio Client is ready */
Twilio.Device.ready(function (device) {
  updateCallStatus("Ready");
});

/* Report any errors to the call status display */
Twilio.Device.error(function (error) {
  updateCallStatus("ERROR: " + error.message);
});

/* Callback for when Twilio Client initiates a new connection */
Twilio.Device.connect(function (connection) {
  // Enable the hang up button and disable the call buttons
  hangUpButton.prop("disabled", false);
  callCustomerButtons.prop("disabled", true);
  callSupportButton.prop("disabled", true);
  answerButton.prop("disabled", true);

  // If phoneNumber is part of the connection, this is a call from a
  // support agent to a customer's phone
  if ("phoneNumber" in connection.message) {
    updateCallStatus("In call with " + connection.message.phoneNumber);
  } else {
    // This is a call from a website user to a support agent
    updateCallStatus("In call with support");
  }
});

/* Callback for when a call ends */
Twilio.Device.disconnect(function(connection) {
  // Disable the hangup button and enable the call buttons
  hangUpButton.prop("disabled", true);
  callCustomerButtons.prop("disabled", false);
  callSupportButton.prop("disabled", false);

  updateCallStatus("Ready");
});

/* Callback for when Twilio Client receives a new incoming call */
Twilio.Device.incoming(function(connection) {
  updateCallStatus("Incoming support call");

  // Set a callback to be executed when the connection is accepted
  connection.accept(function() {
    updateCallStatus("In call with customer");
  });

  // Set a callback on the answer button and enable it
  answerButton.click(function() {
    connection.accept();
  });
  answerButton.prop("disabled", false);
});

/* Call a customer from a support ticket */
function callCustomer(phoneNumber) {
  updateCallStatus("Calling " + phoneNumber + "...");

  var params = {"phoneNumber": phoneNumber};
  Twilio.Device.connect(params);
}

/* Call the support_agent from the home page */
function callSupport() {
  updateCallStatus("Calling support...");

  // Our backend will assume that no params means a call to support_agent
  Twilio.Device.connect();
}

/* End a call */
function hangUp() {
  Twilio.Device.disconnectAll();
}

/**
 * Twilio Client configuration for the browser-calls-rails
 * example application.
 */

// Store some selectors for elements we'll reuse
var callStatus = $("#call-status");
var answerButton = $(".answer-button");
var callSupportButton = $(".call-support-button");
var hangUpButton = $(".hangup-button");
var callCustomerButtons = $(".call-customer-button");

/* Helper function to update the call status bar */
function updateCallStatus(status) {
  callStatus.text(status);
}

/* Get a Twilio Client token with an AJAX request */
$(document).ready(function() {
  $.post("/token/generate", {page: window.location.pathname}, function(data) {
    // Set up the Twilio Client Device with the token
    Twilio.Device.setup(data.token);
  });
});

/* Callback to let us know Twilio Client is ready */
Twilio.Device.ready(function (device) {
  updateCallStatus("Ready");
});

/* Report any errors to the call status display */
Twilio.Device.error(function (error) {
  updateCallStatus("ERROR: " + error.message);
});

/* Callback for when Twilio Client initiates a new connection */
Twilio.Device.connect(function (connection) {
  // Enable the hang up button and disable the call buttons
  hangUpButton.prop("disabled", false);
  callCustomerButtons.prop("disabled", true);
  callSupportButton.prop("disabled", true);
  answerButton.prop("disabled", true);

  // If phoneNumber is part of the connection, this is a call from a
  // support agent to a customer's phone
  if ("phoneNumber" in connection.message) {
    updateCallStatus("In call with " + connection.message.phoneNumber);
  } else {
    // This is a call from a website user to a support agent
    updateCallStatus("In call with support");
  }
});

/* Callback for when a call ends */
Twilio.Device.disconnect(function(connection) {
  // Disable the hangup button and enable the call buttons
  hangUpButton.prop("disabled", true);
  callCustomerButtons.prop("disabled", false);
  callSupportButton.prop("disabled", false);

  updateCallStatus("Ready");
});

/* Callback for when Twilio Client receives a new incoming call */
Twilio.Device.incoming(function(connection) {
  updateCallStatus("Incoming support call");

  // Set a callback to be executed when the connection is accepted
  connection.accept(function() {
    updateCallStatus("In call with customer");
  });

  // Set a callback on the answer button and enable it
  answerButton.click(function() {
    connection.accept();
  });
  answerButton.prop("disabled", false);
});

/* Call a customer from a support ticket */
function callCustomer(phoneNumber) {
  updateCallStatus("Calling " + phoneNumber + "...");

  var params = {"phoneNumber": phoneNumber};
  Twilio.Device.connect(params);
}

/* Call the support_agent from the home page */
function callSupport() {
  updateCallStatus("Calling support...");

  // Our backend will assume that no params means a call to support_agent
  Twilio.Device.connect();
}

/* End a call */
function hangUp() {
  Twilio.Device.disconnectAll();
}

class CallController < ApplicationController
  skip_before_filter :verify_authenticity_token

  def connect
    render xml: twilio_reponse
  end

  private

  def twilio_reponse
    twilio_number = ENV['TWILIO_PHONE_NUMBER']

    res = Twilio::TwiML::VoiceResponse.new do |response|
      dial = Twilio::TwiML::Dial.new caller_id: twilio_number

      if params.include?(:phoneNumber)
        dial.number params[:phoneNumber]
      else
        dial.client('support_agent')
      end
      response.append(dial)
    end
    return res.to_s
  end
end

/**
 * Twilio Client configuration for the browser-calls-rails
 * example application.
 */

// Store some selectors for elements we'll reuse
var callStatus = $("#call-status");
var answerButton = $(".answer-button");
var callSupportButton = $(".call-support-button");
var hangUpButton = $(".hangup-button");
var callCustomerButtons = $(".call-customer-button");

/* Helper function to update the call status bar */
function updateCallStatus(status) {
  callStatus.text(status);
}

/* Get a Twilio Client token with an AJAX request */
$(document).ready(function() {
  $.post("/token/generate", {page: window.location.pathname}, function(data) {
    // Set up the Twilio Client Device with the token
    Twilio.Device.setup(data.token);
  });
});

/* Callback to let us know Twilio Client is ready */
Twilio.Device.ready(function (device) {
  updateCallStatus("Ready");
});

/* Report any errors to the call status display */
Twilio.Device.error(function (error) {
  updateCallStatus("ERROR: " + error.message);
});

/* Callback for when Twilio Client initiates a new connection */
Twilio.Device.connect(function (connection) {
  // Enable the hang up button and disable the call buttons
  hangUpButton.prop("disabled", false);
  callCustomerButtons.prop("disabled", true);
  callSupportButton.prop("disabled", true);
  answerButton.prop("disabled", true);

  // If phoneNumber is part of the connection, this is a call from a
  // support agent to a customer's phone
  if ("phoneNumber" in connection.message) {
    updateCallStatus("In call with " + connection.message.phoneNumber);
  } else {
    // This is a call from a website user to a support agent
    updateCallStatus("In call with support");
  }
});

/* Callback for when a call ends */
Twilio.Device.disconnect(function(connection) {
  // Disable the hangup button and enable the call buttons
  hangUpButton.prop("disabled", true);
  callCustomerButtons.prop("disabled", false);
  callSupportButton.prop("disabled", false);

  updateCallStatus("Ready");
});

/* Callback for when Twilio Client receives a new incoming call */
Twilio.Device.incoming(function(connection) {
  updateCallStatus("Incoming support call");

  // Set a callback to be executed when the connection is accepted
  connection.accept(function() {
    updateCallStatus("In call with customer");
  });

  // Set a callback on the answer button and enable it
  answerButton.click(function() {
    connection.accept();
  });
  answerButton.prop("disabled", false);
});

/* Call a customer from a support ticket */
function callCustomer(phoneNumber) {
  updateCallStatus("Calling " + phoneNumber + "...");

  var params = {"phoneNumber": phoneNumber};
  Twilio.Device.connect(params);
}

/* Call the support_agent from the home page */
function callSupport() {
  updateCallStatus("Calling support...");

  // Our backend will assume that no params means a call to support_agent
  Twilio.Device.connect();
}

/* End a call */
function hangUp() {
  Twilio.Device.disconnectAll();
}

/**
 * Twilio Client configuration for the browser-calls-rails
 * example application.
 */

// Store some selectors for elements we'll reuse
var callStatus = $("#call-status");
var answerButton = $(".answer-button");
var callSupportButton = $(".call-support-button");
var hangUpButton = $(".hangup-button");
var callCustomerButtons = $(".call-customer-button");

/* Helper function to update the call status bar */
function updateCallStatus(status) {
  callStatus.text(status);
}

/* Get a Twilio Client token with an AJAX request */
$(document).ready(function() {
  $.post("/token/generate", {page: window.location.pathname}, function(data) {
    // Set up the Twilio Client Device with the token
    Twilio.Device.setup(data.token);
  });
});

/* Callback to let us know Twilio Client is ready */
Twilio.Device.ready(function (device) {
  updateCallStatus("Ready");
});

/* Report any errors to the call status display */
Twilio.Device.error(function (error) {
  updateCallStatus("ERROR: " + error.message);
});

/* Callback for when Twilio Client initiates a new connection */
Twilio.Device.connect(function (connection) {
  // Enable the hang up button and disable the call buttons
  hangUpButton.prop("disabled", false);
  callCustomerButtons.prop("disabled", true);
  callSupportButton.prop("disabled", true);
  answerButton.prop("disabled", true);

  // If phoneNumber is part of the connection, this is a call from a
  // support agent to a customer's phone
  if ("phoneNumber" in connection.message) {
    updateCallStatus("In call with " + connection.message.phoneNumber);
  } else {
    // This is a call from a website user to a support agent
    updateCallStatus("In call with support");
  }
});

/* Callback for when a call ends */
Twilio.Device.disconnect(function(connection) {
  // Disable the hangup button and enable the call buttons
  hangUpButton.prop("disabled", true);
  callCustomerButtons.prop("disabled", false);
  callSupportButton.prop("disabled", false);

  updateCallStatus("Ready");
});

/* Callback for when Twilio Client receives a new incoming call */
Twilio.Device.incoming(function(connection) {
  updateCallStatus("Incoming support call");

  // Set a callback to be executed when the connection is accepted
  connection.accept(function() {
    updateCallStatus("In call with customer");
  });

  // Set a callback on the answer button and enable it
  answerButton.click(function() {
    connection.accept();
  });
  answerButton.prop("disabled", false);
});

/* Call a customer from a support ticket */
function callCustomer(phoneNumber) {
  updateCallStatus("Calling " + phoneNumber + "...");

  var params = {"phoneNumber": phoneNumber};
  Twilio.Device.connect(params);
}

/* Call the support_agent from the home page */
function callSupport() {
  updateCallStatus("Calling support...");

  // Our backend will assume that no params means a call to support_agent
  Twilio.Device.connect();
}

/* End a call */
function hangUp() {
  Twilio.Device.disconnectAll();
}