Moving

Rakefile

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+require 'rake'
+require 'rake/testtask'
+require 'rake/rdoctask'
+
+desc 'Default: run unit tests.'
+task :default => :test
+
+desc 'Test the upcoming_sidebar plugin.'
+Rake::TestTask.new(:test) do |t|
+  t.libs << 'lib'
+  t.pattern = 'test/**/*_test.rb'
+  t.verbose = true
+end
+
+desc 'Generate documentation for the upcoming_sidebar plugin.'
+Rake::RDocTask.new(:rdoc) do |rdoc|
+  rdoc.rdoc_dir = 'rdoc'
+  rdoc.title    = 'UpcomingSidebar'
+  rdoc.options << '--line-numbers' << '--inline-source'
+  rdoc.rdoc_files.include('README')
+  rdoc.rdoc_files.include('lib/**/*.rb')
+end

init.rb

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+require 'sidebar'
+require 'upcoming_sidebar'
+
+UpcomingSidebar.view_root = File.dirname(__FILE__) + '/views'
+

lib/upcoming.rb

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+require 'open-uri'
+require 'rexml/document'
+
+# Example:
+#
+# upcoming = Upcoming.new('http://upcoming.org/syndicate/my_events/<your_user_id>')
+# upcoming.events.each do |event|
+#   puts "#{event.title} @  #{event.timespan} #{event.link} : #{event.description}"
+# end
+#
+
+class Upcoming
+  include REXML
+
+  def choose(num)
+    events.last(num)
+  end
+
+  attr_accessor :events, :link, :title, :description, :url
+
+  # This object holds given information for an Event
+  class Event < Struct.new(:link, :title, :description)
+    def to_s; title end
+
+    def timespan
+      description.split(':')[0]
+    end
+
+    def info
+        description.split(':')[1]
+    end
+  end
+
+  # Pass the url to the RSS feed you would like to keep tabs on
+  # by default this will request the rss from the server right away and
+  # fill the tasks array
+  def initialize(url, refresh = true)
+    self.events  = []
+    self.url    = url
+    self.refresh if refresh
+  end
+
+  # This method lets you refresh the tasks int the tasks array
+  # useful if you keep the object cached in memory and
+  def refresh
+    open(@url) do |http|
+      parse(http.read)
+    end
+  end
+
+private
+
+  def parse(body)
+
+    xml = Document.new(body)
+
+    self.events       = []
+    self.link         = XPath.match(xml, "//channel/link/text()").to_s
+    self.title        = XPath.match(xml, "//channel/title/text()").to_s
+    self.description  = XPath.match(xml, "//channel/description/text()").to_s
+
+    XPath.each(xml, "//item/") do |elem|
+
+      event = Event.new
+      event.title       = XPath.match(elem, "title/text()").to_s
+      event.link        = XPath.match(elem, "link/text()").to_s
+      event.description = XPath.match(elem, "description/text()").to_s
+      event.inspect
+      events << event
+    end
+  end
+end
+
+

lib/upcoming_sidebar.rb

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+class UpcomingSidebar < Sidebar
+  description 'Events from <a href="http://www.upcoming.org">upcoming.org</a>'
+
+  setting :feed, '', :label => 'Feed URL'
+  setting :count, 4, :label => 'Items Limit'
+
+  lifetime 6.hours
+
+  def upcoming
+    @upcoming ||= Upcoming.new(feed)
+  rescue Exception => e
+    logger.info e
+    nil
+  end
+end

test/upcoming_sidebar_test.rb

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+require 'test/unit'
+require File.dirname(__FILE__) + '/../../../../test/test_helper'
+
+class UpcomingSidebarTest < Test::Unit::TestCase
+  def test_sidebar_is_available
+    assert Sidebar.available_sidebars.include?(UpcomingSidebar)
+  end
+end

views/content.rhtml

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+<% if sidebar.upcoming -%>
+<h3>Upcoming Events</h3>
+<ul id="upcoming">
+<% for event in sidebar.upcoming.choose(count.to_i) -%>
+  <li><%= link_to event.title, event.link, {:title => event.description } %> - <%= event.timespan %></li>
+  <% end -%>
+</ul>
+<% end -%>