Shows you how to get the latest tweets from RSS, cache them and display them in Refinery CMS

_latest_tweets.html.erb

<%
  twitter_cache_expiry_maximum = RefinerySetting.find_or_set(:twitter_cache_expiry_seconds, 90)
  twitter_cache = RefinerySetting.find_or_set(:twitter_cache, {
    :timestamp => Time.now + twitter_cache_expiry_maximum.seconds + 30.seconds
  }) # set an invalid one if it doesn't exist.
  #cache twitter for 1 minute
  unless twitter_cache.nil? or
         ((Time.now - twitter_cache[:timestamp]) >= twitter_cache_expiry_maximum.to_i)
    tweets = twitter_cache[:tweets]
    twitter_cache.inspect
  end
-%>

<div id='twitter_content'>
  <% if tweets.present? %>
    <%= render :partial => "/shared/twitter_tweets",
               :locals => {:tweets => tweets} %>
  <% else %>
    <%= image_tag "ajax-loader.gif", :alt => "", :theme => true %> Loading...
  <% end %>
</div>

_twitter_tweets.html.erb

<ul id='tweets'>
  <% tweets.each do |tweet| %>
    <li>
      <%= tweet[:title].gsub("refinerycms: ", "").gsub(/(http:\/\/.*\ ?)/) {
            link_to($1, $1, :target => "_blank")
          } %>
    </li>
  <% end if tweets.present? and tweets.any? %>
</ul>

index.html

<h2>Latest Tweet</h2>
<%= render :partial => "/shared/latest_tweets" %>

<% content_for :scripts do %>
  <script type='text/javascript'>
    $(document).ready(function() {
      try {
        if ($('#twitter_content').children('ul').length == 0) {
          $.get("<%= twitter_url %>", function(data, responseText) {
            $('#twitter_content').html(data);
          });
        }
      }
      catch(error) {
        $('#twitter_content').html("Could not load tweets. Click <a href='http://twitter.com/RefineryCMS' target='_blank'>here</a> to see our twitter feed.")
      }

    });
  </scripts>
<% end %>

routes.rb

ActionController::Routing::Routes.draw do |map|

  map.twitter '/twitter', :controller => "twitter", :action => "twitter"

end

twitter_controller.rb

class TwitterController < ApplicationController

  around_filter :cache_twitter, :only => [:twitter]

  def twitter
    begin
      Timeout::timeout(5) {
        result = RSSParser.run(RefinerySetting.find_or_set(:twitter_rss_feed_url,
                               "http://twitter.com/statuses/user_timeline/19258840.rss"))
        @tweets = result[:items][0..0] if result.present? and result[:items].present?
      }
    rescue Timeout::Error => e
      logger.warn("timeout exceeded for downloading twitter RSS: #{e}")
      @tweets = nil
    end

    render :partial => "/shared/twitter_tweets",
           :locals => {:tweets => @tweets},
           :layout => false
  end

protected

  def cache_twitter
    yield

    RefinerySetting[:twitter_cache] = {
      :tweets => @tweets,
      :timestamp => Time.now
    } if @tweets.present?
  end

end