Voicemail-by-email with Twilio

app.rb

require 'rubygems'
require 'twilio-ruby'
require 'sinatra'
require 'pony'
require 'open-uri'

# Config
MY_NUMBER = "+19995551234"
TO_EMAIL = "voicemail@adambard.com"
SMTP_HOST = "<SMTP hostname here>"
SMTP_USER = "<your username here>"
SMTP_PASSWORD = "<your password here>"

# Send a message with an mp3 voicemail attachment
def send_message(subject, message, file_url)
    Pony.mail({
        :to => TO_EMAIL
        :body => message,
        :via => :smtp,
        :via_options => {
            :address => SMTP_HOST,
            :user_name => SMTP_USER,
            :password => SMTP_PASSWORD,
            :port => SMTP_PORT,
            :authentication => :plain },
        :attachments => {"message.mp3" => open(file_url) {|f| f.read }}
    })
end

# Answer the call and try to call MY_NUMBER
get '/answer' do
    Twilio::TwiML::Response.new do |r|
        r.Say "Thank you for calling. Please wait while we attempt to connect you."
        r.Dial :timeout => "10", :action => "/record-or-hangup", :method => "get" do |d|
            r.Number MY_NUMBER
        end
    end.text
end

# If DialCallStatus is "completed", just hang up. Otherwise, record a message
get '/record-or-hangup' do
    Twilio::TwiML::Response.new do |r|
        if params['DialCallStatus'] == 'completed'
            r.Hangup
        else
            r.Say "Sorry, looks like nobody's around. Please leave a message."
            r.Record :action => "/save-recording", :method => "get"
        end
    end.text
end

# Email the message, then thank the caller and hang up
get '/save-recording' do
    send_message("New Message on the hotline",
                 "Message length: #{params['RecordingDuration']}",
                 params['RecordingUrl'] + '.mp3')

    Twilio::TwiML::Response.new do |r|
        r.Say "Thank you for calling. Bye!"
        r.Hangup
    end.text
end