Add Sinatra app for feeds.

Gemfile

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+source :rubygems
+
+gem 'sinatra'
+gem 'sinatra-jsonp'
+gem 'faraday'
+gem 'xml-simple'
+gem 'foreman'
+
+group :development do
+  gem 'shotgun'
+end
+
+group :production do
+  gem 'thin'
+end

Gemfile.lock

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+GEM
+  remote: http://rubygems.org/
+  specs:
+    daemons (1.1.9)
+    eventmachine (1.0.0)
+    faraday (0.8.4)
+      multipart-post (~> 1.1)
+    foreman (0.61.0)
+      thor (>= 0.13.6)
+    multi_json (1.3.7)
+    multipart-post (1.1.5)
+    rack (1.5.0)
+    rack-protection (1.3.2)
+      rack
+    shotgun (0.9)
+      rack (>= 1.0)
+    sinatra (1.3.3)
+      rack (~> 1.3, >= 1.3.6)
+      rack-protection (~> 1.2)
+      tilt (~> 1.3, >= 1.3.3)
+    sinatra-jsonp (0.4.1)
+      multi_json (~> 1.3.7)
+      sinatra (~> 1.0)
+    thin (1.5.0)
+      daemons (>= 1.0.9)
+      eventmachine (>= 0.12.6)
+      rack (>= 1.0.0)
+    thor (0.17.0)
+    tilt (1.3.3)
+    xml-simple (1.1.2)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  faraday
+  foreman
+  shotgun
+  sinatra
+  sinatra-jsonp
+  thin
+  xml-simple

config.ru

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+require 'bundler'
+
+Bundler.setup
+require './tubefeed'
+
+run Tubefeed

tubefeed.rb

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+require 'sinatra'
+require 'json'
+require 'xmlsimple'
+require 'faraday'
+
+class Tubefeed < Sinatra::Base
+  def parse_xml_feed(feed_url)
+    uri = URI(feed_url)
+    conn = Faraday.new(:url => "#{uri.scheme}://#{uri.host}")
+    response = conn.get(uri.request_uri)
+    XmlSimple.xml_in response.body
+  end
+
+  get '/' do
+    send_file File.join(settings.public_folder, 'index.html')
+  end
+
+  get '/now.json' do
+    feed_data = parse_xml_feed("http://cloud.tfl.gov.uk/TrackerNet/LineStatus")
+
+    # Parse the XML into the appropriate structure for our app.
+    data = feed_data["LineStatus"].map do |line|
+      { :id => line["Line"].first["Name"].downcase.gsub(/ (and)?/, ""),
+        :name => line["Line"].first["Name"],
+        :status => line["Status"].first["Description"].downcase,
+        :messages => [] }
+    end
+
+    JSON data
+  end
+
+  get '/weekend.json' do
+    feed_data = parse_xml_feed("http://www.tfl.gov.uk/tfl/businessandpartners/syndication/feed.aspx?email=#{ENV["TUBESTATUS_FEED_EMAIL"]}&feedId=1")
+
+    # Parse the XML into the appropriate structure for our app.
+    data = feed_data["Lines"].first["Line"].map do |line|
+      messages = line["Status"].first["Message"].first["Text"]
+      # Ensure messages is an empty array if there are no messages.
+      if messages.first.is_a?(Hash)
+        messages = []
+      end
+
+      { :id => line["Name"].first.downcase.gsub(/ (&)?/, ""),
+        :name => line["Name"].first,
+        :status => line["Status"].first["Text"].first.downcase,
+        :messages => messages }
+    end
+
+    JSON data
+  end
+end